Sample records for black lung disability

  1. aallll IIrreell aanndd ccaanncceerr ssttaattiissttiiccss sseeccoonndd rreeppoorrtt 11999988--22000000 Lung cancer Lung cancer Lung cancer Lung c

    E-Print Network [OSTI]

    Paxton, Anthony T.

    --22000000 34 Lung cancer Lung cancer Lung cancer Lung c ancer Lung cancer Lung cancer Lung cancer L ung cancer Lung cancer Lung cancer Lung can cer Lung cancer Lung cancer Lung cancer Lun g cancer Lung cancer Lung cancer Lung cance r Lung cancer Lung cancer Lung cancer Lung cancer Lung cancer Lung cancer Lung cancer

  2. Information For Disabled

    E-Print Network [OSTI]

    Oakley, Jeremy

    Information For Disabled And Dyslexic Students. #12;1. What is the Disability and Dyslexia Support and advice. WHAt iS tHe DiSAbility AnD DySlexiA SuppOrt Service (DDSS)? Information for disabledStreet Western Bank The Disability and Dyslexia Support Service University of Sheffield Tram Stop Postal Address

  3. Disability Action Plan Establishment

    E-Print Network [OSTI]

    , TAFE and students with disabilities on the University's access programs and general services Learning Centre, Careers & Employer Liaison Centre and Health, Counselling & Disability Service. · Continue with disabilities (e.g. Auslan interpreters). · Ensure that students with disabilities are regularly consulted

  4. Information For Disabled

    E-Print Network [OSTI]

    Dixon, Peter

    ;1. What is the Disability and Dyslexia Support Service? 2. How to contact us 3. Applying to the University to provide additional information and advice. WHAt iS tHe DiSAbility AnD DySlexiA SUppOrt Service (DDSS Hounsfield Road Durham Road ClarksonStreet Western Bank The Disability and Dyslexia Support Service

  5. T:\\PTSData\\ParkingRequest\\Disabled Permit Disabled Student Services

    E-Print Network [OSTI]

    de Lijser, Peter

    T:\\PTSData\\ParkingRequest\\Disabled Permit Disabled Student Services Temporary Disabled Person Parking Permit Request Form Parking & Transportation Services (657) 278-3082 / Fax (657) 278-4533 Temporary Disabled Person permits will be issued after completion of Section II by Disabled Student Services

  6. Information For Disabled

    E-Print Network [OSTI]

    Li, Yi

    the Disability and Dyslexia Support Service. The Service facilitates students' full inclusion in academic life and Dyslexia Support Service? 3 2. How to contact us 4 3. Applying to the university and accessing support 5 a/from the University 30 l. Securing personal care support 31 Index 32 #12;3 1. What is the Disability and Dyslexia

  7. American Disabilities Act

    Broader source: Energy.gov [DOE]

    The Americans with Disabilities Act prohibits private employers, state and local governments, employment agencies and labor unions from discriminating against qualified individuals with disabilities in job application procedures, hiring, firing, advancement, compensation, job training, and other terms, conditions, and privileges of employment.

  8. Disability Employment Awareness Month

    Broader source: Energy.gov [DOE]

    Utilizing the talents of all Americans is essential for our Nation to out-innovate, out-educate, and out-build the rest of the world. During National Disability Employment Awareness Month, we...

  9. Essays on disability and employment

    E-Print Network [OSTI]

    Thompkins, Allison V. (Allison Victoria)

    2011-01-01T23:59:59.000Z

    This dissertation consists of three essays which examine the impact of public policy on labor market outcomes of those with disabilities. The first essay analyzes a microlending program for people with disabilities in ...

  10. Black Holes

    E-Print Network [OSTI]

    P. K. Townsend

    1997-07-04T23:59:59.000Z

    Lecture notes for a 'Part III' course 'Black Holes' given in DAMTP, Cambridge. The course covers some of the developments in Black Hole physics of the 1960s and 1970s.

  11. Frizzled-8 as a putative therapeutic target in human lung cancer

    SciTech Connect (OSTI)

    Wang, Hua-qing [Department of Radiation and Medical Oncology, Zhongnan Hospital, Hubei Cancer Clinical Study Center, Wuhan University, Wuhan 430071 (China) [Department of Radiation and Medical Oncology, Zhongnan Hospital, Hubei Cancer Clinical Study Center, Wuhan University, Wuhan 430071 (China); Department of Medical Oncology, Tianjin Medical University Cancer Hospital, Tianjin 300060 (China); Xu, Mei-lin [Department of Pathology, Tianjin Chest Hospital, Tianjin 300051 (China)] [Department of Pathology, Tianjin Chest Hospital, Tianjin 300051 (China); Ma, Jie [Department of Pathology, Henan Cancer Hospital, Zhengzhou (China)] [Department of Pathology, Henan Cancer Hospital, Zhengzhou (China); Zhang, Yi [Department of Thoracic Surgery, Xuanwu Hospital, Capital Medical University, Beijing 100053 (China)] [Department of Thoracic Surgery, Xuanwu Hospital, Capital Medical University, Beijing 100053 (China); Xie, Cong-hua, E-mail: publication.submission@gmail.com [Department of Radiation and Medical Oncology, Zhongnan Hospital, Hubei Cancer Clinical Study Center, Wuhan University, Wuhan 430071 (China)] [Department of Radiation and Medical Oncology, Zhongnan Hospital, Hubei Cancer Clinical Study Center, Wuhan University, Wuhan 430071 (China)

    2012-01-06T23:59:59.000Z

    Highlights: Black-Right-Pointing-Pointer Fzd-8 is over-expressed in human lung cancer. Black-Right-Pointing-Pointer shRNA knock-down of Fzd-8 inhibits proliferation and Wnt pathway in lung cancer cells. Black-Right-Pointing-Pointer shRNA knock-down of Fzd-8 suppresses tumor growth in vivo. Black-Right-Pointing-Pointer shRNA knock-down Fzd-8 sensitizes lung cancer cells to chemotherapy Taxotere. -- Abstract: Lung cancer is the leading cause of cancer related deaths worldwide. It is necessary to better understand the molecular mechanisms involved in lung cancer in order to develop more effective therapeutics for the treatment of this disease. Recent reports have shown that Wnt signaling pathway is important in a number of cancer types including lung cancer. However, the role of Frizzled-8 (Fzd-8), one of the Frizzled family of receptors for the Wnt ligands, in lung cancer still remains to be elucidated. Here in this study we showed that Fzd-8 was over-expressed in human lung cancer tissue samples and cell lines. To investigate the functional importance of the Fzd-8 over-expression in lung cancer, we used shRNA to knock down Fzd-8 mRNA in lung cancer cells expressing the gene. We observed that Fzd-8 shRNA inhibited cell proliferation along with decreased activity of Wnt pathway in vitro, and also significantly suppressed A549 xenograft model in vivo (p < 0.05). Furthermore, we found that knocking down Fzd-8 by shRNA sensitized the lung cancer cells to chemotherapy Taxotere. These data suggest that Fzd-8 is a putative therapeutic target for human lung cancer and over-expression of Fzd-8 may be important for aberrant Wnt activation in lung cancer.

  12. Forestry Commission Disability Equality

    E-Print Network [OSTI]

    Duty Statistics The FC's employment monitoring statistics for 1 April 2007 until 31 March 2008 provides details of how the FC will address the requirements of the Disability Equality Employment Duties, to provide annual monitoring statistics of the FC's staff and to highlight examples of good practice through

  13. Revised: 4.26.2012 Making Your Blackboard Courses Accessible to Students with Disabilities p. 1 of 2 What is accessibility?

    E-Print Network [OSTI]

    Qiu, Weigang

    with disabilities. These assistive devices need to be taken into consideration when designing accessible web your Blackboard site. Use a dark color font that is easy to read on a white background. While black

  14. Does aluminum smelting cause lung disease

    SciTech Connect (OSTI)

    Abramson, M.J.; Wlodarczyk, J.H.; Saunders, N.A.; Hensley, M.J.

    1989-04-01T23:59:59.000Z

    The evidence concerning a relationship between work in the aluminum industry and lung disease has been reviewed using epidemiologic criteria. Adequate data on environmental exposure are rarely presented. Case series on aluminum potroom workers over the past 50 years have identified an asthmalike syndrome that appears to be due to an irritant rather than an allergic mechanism. These studies have been supported by evidence of within shift variability of measures of lung function. However, to date, there is inadequate evidence to resolve the question of whether potroom exposure initiates asthma or merely precipitates asthmalike symptoms in a predisposed individual. Cross-sectional studies have demonstrated evidence of reduced lung function, consistent with chronic airflow limitation. In exposed aluminum smelter workers compared to unexposed control subjects. Cigarette smoking, the major potential confounding variable, has been measured and accounted for in multivariate analyses. To date, evidence is lacking from longitudinal studies about the development of disabling chronic obstructive lung disease. Exposure to coal tar pitch volatiles in the production and consumption of anodes has biologic plausibility for an association of lung cancer with work in an aluminum smelter. Although retrospective mortality studies have failed to account for the probable high prevalence of smoking in blue collar workers, the relative risk of lung cancer is very low if present at all. Pulmonary fibrosis has not been shown to be a significant problem in aluminum smelter workers. Future research in the aluminum industry needs to concentrate on longitudinal studies, preferably with an inception cohort for the investigation of potroom asthma. 92 references.

  15. AmericanLungAssociationStateofLungDiseaseinDiverseCommunities2010 55 Lung Cancer

    E-Print Network [OSTI]

    Kaski, Samuel

    AmericanLungAssociationStateofLungDiseaseinDiverseCommunities2010 55 Lung Cancer Lung cancer of cancer cells (tumors) then form and grow . Besides interfering with how the lung functions, cancer cells organs . Causes Cigarette smoking is by far the most important cause of lung cancer, and the risk from

  16. Americans with Disabilities Act Signed (1990)

    Broader source: Energy.gov [DOE]

    The Americans with Disabilities Act of 1990 (ADA) prohibits discrimination and ensures equal opportunity for persons with disabilities in employment, State and local government services, public...

  17. Student Handbook SERVICES FOR STUDENTS WITH DISABILITIES

    E-Print Network [OSTI]

    Texas at Austin, University of

    Student Handbook SERVICES FOR STUDENTS WITH DISABILITIES #12;Contents Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 Services for Students with Disabilities . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 Step students should take

  18. Welcoming and Supporting Disabled Students

    E-Print Network [OSTI]

    points in providing written material 19 Web links 20 6 Preparing the physical environment 21 6Concept4:DisclosureofDisability 37 1 Opportunities for disclosure 37 2 Positive action 38 3 Confidentiality 39 4 Level of disclosure 40 5 Barriers to disclosure 40 6 Non - identification with `disability' 42 7

  19. Documentation Requirements for Learning Disabilities

    E-Print Network [OSTI]

    Documentation Requirements for Learning Disabilities Students, faculty, staff, and campus guests wishing to request accommodations due to learning disabilities should refer to the following documentation of interest. C) Documentation must be typed, dated, signed by the evaluator and submitted to ODR

  20. Fluid blade disablement tool

    DOE Patents [OSTI]

    Jakaboski, Juan-Carlos (Albuquerque, NM); Hughs, Chance G. (Albuquerque, NM); Todd, Steven N. (Rio Rancho, NM)

    2012-01-10T23:59:59.000Z

    A fluid blade disablement (FBD) tool that forms both a focused fluid projectile that resembles a blade, which can provide precision penetration of a barrier wall, and a broad fluid projectile that functions substantially like a hammer, which can produce general disruption of structures behind the barrier wall. Embodiments of the FBD tool comprise a container capable of holding fluid, an explosive assembly which is positioned within the container and which comprises an explosive holder and explosive, and a means for detonating. The container has a concavity on the side adjacent to the exposed surface of the explosive. The position of the concavity relative to the explosive and its construction of materials with thicknesses that facilitate inversion and/or rupture of the concavity wall enable the formation of a sharp and coherent blade of fluid advancing ahead of the detonation gases.

  1. Disability Services | Department of Energy

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Delicious Rank EERE:Year in Review: TopEnergy DOEDealingVehicle BatteryofDisability Services Disability Services

  2. QUESTIONS & ANSWERS ABOUT LUNG CANCER

    E-Print Network [OSTI]

    QUESTIONS & ANSWERS ABOUT LUNG CANCER Q: What are the early signs of lung cancer? How would I know I have it? A: Some of the early warning signs of lung cancer are: · A cough that doesn't go away what may be causing these symptoms. Q: How is lung cancer diagnosed? A: Your doctor may do one or more

  3. Lung pair phantom

    DOE Patents [OSTI]

    Olsen, Peter C. (West Richland, WA); Gordon, N. Ross (Kennewick, WA); Simmons, Kevin L. (Kennewick, WA)

    1993-01-01T23:59:59.000Z

    The present invention is a material and method of making the material that exhibits improved radiation attenuation simulation of real lungs, i.e., an "authentic lung tissue" or ALT phantom. Specifically, the ALT phantom is a two-part polyurethane medium density foam mixed with calcium carbonate, potassium carbonate if needed for K-40 background, lanthanum nitrate, acetone, and a nitrate or chloride form of a radionuclide. This formulation is found to closely match chemical composition and linear attenuation of real lungs. The ALT phantom material is made according to established procedures but without adding foaming agents or preparing thixotropic concentrate and with a modification for ensuring uniformity of density of the ALT phantom that is necessary for accurate simulation. The modification is that the polyurethane chemicals are mixed at a low temperature prior to pouring the polyurethane mixture into the mold.

  4. Forestry Commission Disability Equality Scheme

    E-Print Network [OSTI]

    Forestry Commission Disability Equality Scheme 2009-2012 #12;CONTENTS Page · Foreword by the Forestry Commissioners 3 · Introduction 4 · The Forestry Commission's Structure 9 · Legal Obligations 12 20 · The Forestry Commission as a Service Provider 22 · The Forestry Commission as an Employer 23

  5. Early Lung Cancer Detection Program

    Broader source: Energy.gov [DOE]

    Since 2000, DOE has made screening for occupational lung cancer with low-dose helical computed tomography (CT) scans available to workers at high risk for lung cancer. Because former workers undertook essential activities to fulfill the Department's mission, many of them were at risk for lung cancer.

  6. Disability Employment | Department of Energy

    Energy Savers [EERE]

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Delicious RankCombustion |Energy UsageAUDITVehicles » AlternativeUp HomeHorseDOECybersecurity andDisability Employment

  7. MYTHS AND FACTS REGARDING HIRING PEOPLE WITH DISABILITIES Providing accommodations for people with disabilities is expensive.

    E-Print Network [OSTI]

    Tsien, Roger Y.

    MYTHS AND FACTS REGARDING HIRING PEOPLE WITH DISABILITIES MYTH: Providing accommodations for people, with many costing nothing at all. MYTH: The ADA (Americans with Disabilities Act) forces employers to hire

  8. BUILD Program bridge to university for individuals with learning disabilities

    E-Print Network [OSTI]

    : ·Discovertheuniquechallenges faced by students with learning disabilities in their transition to university ·Developtime-management.uwindsor.ca/disability If you are a student with a learning disability, making a successful transition

  9. Disability & Dyslexia Support Service (DDSS) Consent to Share Information Form

    E-Print Network [OSTI]

    Li, Yi

    Disability & Dyslexia Support Service (DDSS) Consent to Share Information Form Please print By registering with the Disability and Dyslexia Support Service (DDSS) I understand that I am subscribed

  10. STEM Career Showcase for Students with Disabilities - North Carolina...

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

    STEM Career Showcase for Students with Disabilities - North Carolina Museum of Natural Sciences STEM Career Showcase for Students with Disabilities - North Carolina Museum of...

  11. (P0607-1797) Disability Office

    E-Print Network [OSTI]

    Harman, Neal.A.

    (P0607-1797) Disability Office University Policy on Specific Learning Difficulties (Dyslexia) #12. What is Dyslexia? 3 4. Recording Lectures 4 5. Assessment and Examination Provision 4 5.1. Marking from students with disabilities. Dyslexia, a Specific Learning Difficulty (SpLD), is a registered

  12. (P0607-1796) Disability Office

    E-Print Network [OSTI]

    Harman, Neal.A.

    (P0607-1796) Disability Office Dyslexia and Specific Learning Difficulties A Document on Good Practice, including Marking Guidelines Dr. Margaret Meehan, Dyslexia Tutor May 2007 Disability Office. What is Dyslexia? 4 4. How is a Student Officially Assessed as Dyslexic? 6 5. Problems Encountered

  13. Student Disability Transportation Policies and Procedures

    E-Print Network [OSTI]

    Portman, Douglas

    Student Disability Transportation Policies and Procedures Enrolled students with a permanent or temporary disability that require transportation while on-campus, should submit an application form through the University Health Service office. If approved through UHS, the transportation coordinator will contact you

  14. Disability Guide We are here to help

    E-Print Network [OSTI]

    Library Disability Guide #12;We are here to help The library team is here to make sure everyone can: for help with borrowing and requesting books, registration and general enquiries All contact details and support To help deliver bespoke support we work closely with the College Disability Advisory Service

  15. Black Pine Engineering

    Broader source: Energy.gov [DOE]

    Black Pine Engineering is commercializing a disruptive technology in the turbomachinery industry. Using a patented woven composite construction, Black Pine Engineering can make turbomachines (turbines, compressors) that are cheaper and lighter than competing technologies. Using this technology, Black Pine Engineering will sell turbo-compressors which solve the problem of wasted steam in geothermal power plants.

  16. Black Hole Chemistry

    E-Print Network [OSTI]

    David Kubiznak; Robert B. Mann

    2014-04-08T23:59:59.000Z

    The mass of a black hole has traditionally been identified with its energy. We describe a new perspective on black hole thermodynamics, one that identifies the mass of a black hole with chemical enthalpy, and the cosmological constant as thermodynamic pressure. This leads to an understanding of black holes from the viewpoint of chemistry, in terms of concepts such as Van der Waals fluids, reentrant phase transitions, and triple points. Both charged and rotating black holes exhibit novel chemical-type phase behaviour, hitherto unseen.

  17. ANNUAL ACCOMPLISHMENT PLAN UPDATE FOR DISABLED VETERANS

    National Nuclear Security Administration (NNSA)

    more disabled comprise 4.7%. *Data current as of September 22, 2012 FY 2012 NNSA DVAAP Report 5 Organizational Structure FY 2012 NNSA DVAAP Report 6 o Agency Mission Overview The...

  18. Bicycling Black Rings

    E-Print Network [OSTI]

    Elvang, Henriette

    2008-01-01T23:59:59.000Z

    We present detailed physics analyses of two different 4+1-dimensional asymptotically flat vacuum black hole solutions with spin in two independent planes: the doubly spinning black ring and the bicycling black ring system ("bi-rings"). The latter is a new solution describing two concentric orthogonal rotating black rings which we construct using the inverse scattering technique. We focus particularly on extremal zero-temperature limits of the solutions. Such limits exist for both types of solutions; for the bi-rings it is obtained when the two rings drag each other to extremality through the effect of gravitational frame-dragging. We construct the phase diagram of currently known zero-temperature vacuum black hole solutions with a single event horizon, and discuss the non-uniqueness introduced by more exotic black hole configurations such as bi-rings and multi-ring saturns.

  19. Bicycling Black Rings

    E-Print Network [OSTI]

    Henriette Elvang; Maria J. Rodriguez

    2008-01-25T23:59:59.000Z

    We present detailed physics analyses of two different 4+1-dimensional asymptotically flat vacuum black hole solutions with spin in two independent planes: the doubly spinning black ring and the bicycling black ring system ("bi-rings"). The latter is a new solution describing two concentric orthogonal rotating black rings which we construct using the inverse scattering technique. We focus particularly on extremal zero-temperature limits of the solutions. We construct the phase diagram of currently known zero-temperature vacuum black hole solutions with a single event horizon, and discuss the non-uniqueness introduced by more exotic black hole configurations such as bi-rings and multi-ring saturns.

  20. BLACK HISTORY MONTH

    Broader source: Energy.gov [DOE]

    Black History Month is an annual celebration of achievements by black Americans and a time for recognizing the central role of African Americans in U.S. history. The event grew out of Negro History Week, created by historian Carter G. Woodson and other prominent African Americans. Other countries around the world, including Canada and the United Kingdom, also devote a month to celebrating black history.

  1. A Black Hole Levitron

    E-Print Network [OSTI]

    Xerxes D. Arsiwalla; Erik P. Verlinde

    2009-02-02T23:59:59.000Z

    We study the problem of spatially stabilising four dimensional extremal black holes in background electric/magnetic fields. Whilst looking for stationary stable solutions describing black holes kept in external fields we find that taking a continuum limit of Denef et al's multi-center solutions provides a supergravity description of such backgrounds within which a black hole can be trapped in a given volume. This is realised by levitating a black hole over a magnetic dipole base. We comment on how such a construction resembles a mechanical Levitron.

  2. Dynamics of black holes

    E-Print Network [OSTI]

    Sean A. Hayward

    2009-02-28T23:59:59.000Z

    This is a review of current theory of black-hole dynamics, concentrating on the framework in terms of trapping horizons. Summaries are given of the history, the classical theory of black holes, the defining ideas of dynamical black holes, the basic laws, conservation laws for energy and angular momentum, other physical quantities and the limit of local equilibrium. Some new material concerns how processes such as black-hole evaporation and coalescence might be described by a single trapping horizon which manifests temporally as separate horizons.

  3. "Hybrid" Black Holes

    E-Print Network [OSTI]

    Valeri P. Frolov; Andrei V. Frolov

    2014-12-30T23:59:59.000Z

    We discuss a solution of the Einstein equations, obtained by gluing the external Kerr metric and the internal Weyl metric, describing an axisymmetric static vacuum distorted black hole. These metrics are glued at the null surfaces representing their horizons. For this purpose we use the formalism of massive thin null shells. The corresponding solution is called a "hybrid" black hole. The massive null shell has an angular momentum which is the origin of the rotation of the external Kerr spacetime. At the same time, the shell distorts the geometry inside the horizon. The inner geometry of the "hybrid" black hole coincides with the geometry of the interior of a non-rotating Weyl-distorted black hole. Properties of the "hybrid" black holes are briefly discussed.

  4. National Heart, Lung, and Blood Institute

    E-Print Network [OSTI]

    Bandettini, Peter A.

    National Heart, Lung, and Blood Institute A T - A - G L A N C E : Asthma A sthma is a chronic Heart, Lung, and Blood Institute (NHLBI) Web site at www.nhlbi.nih.gov (under Health Information

  5. FUNCTIONAL NEUROIMAGING STUDIES OF READING AND READING DISABILITY

    E-Print Network [OSTI]

    FUNCTIONAL NEUROIMAGING STUDIES OF READING AND READING DISABILITY (DEVELOPMENTAL DYSLEXIA) Kenneth in develop- mental dyslexia. Reading disabled readers, relative to nonimpaired readers, demonstrate Reviews 2000;6:207­213. Key Words: dyslexia; neuroimaging; reading; lexical processing; phonol- ogy R

  6. CIGNA Study Uncovers Relationship of Disabilities to Total Benefits Costs

    Broader source: Energy.gov [DOE]

    The findings of a new study reveal an interesting trend. Integrating disability programs with health care programs can potentially lower employers' total benefits costs and help disabled employees get back to work sooner and stay at work.

  7. Contrasting Adult Literacy Learners With and Without Specific Learning Disabilities

    E-Print Network [OSTI]

    Patterson, Margaret; Mellard, Daryl

    2008-04-01T23:59:59.000Z

    Contrasting adult literacy learners with and without specific learning disabilities This study of 311 adult education (AE) learners found 29% self-reported having a specific learning disability (SLD). Significant differences ...

  8. EasyVoice: Breaking barriers for people with voice disabilities

    E-Print Network [OSTI]

    Condado, Paulo

    disabilities. With the advances in computing power, new applications have been developed for helping peopleEasyVoice: Breaking barriers for people with voice disabilities Paulo A. Condado and Fernando G,flobo}@ualg.pt Abstract. Text-to-speech technology has been broadly used to help people with voice disabilities

  9. Richard L. Wiener Steven L. Willborn Disability and Aging

    E-Print Network [OSTI]

    Raina, Ramesh

    federal retirement program (Costa, 1998). The post-Civil War shift toward the classification of disability the Rehabilitation Act of 1973, the Individuals with Disabilities Education Act, and the Americans with Disabilities Act (ADA) of 1990 and as amended in 2008. In a program of study, my colleagues and I, and others

  10. Decloaking disability : images of disability and technology in science fiction media

    E-Print Network [OSTI]

    Verlager, Alicia

    2006-01-01T23:59:59.000Z

    This work examines how images of disability are used to frame cultural narratives regarding technology. As advances in biotechnology ensure that more people will be living with technological prosthetics against and beneath ...

  11. Charging Black Saturn?

    E-Print Network [OSTI]

    Brenda Chng; Robert Mann; Eugen Radu; Cristian Stelea

    2008-10-28T23:59:59.000Z

    We construct new charged static solutions of the Einstein-Maxwell field equations in five dimensions via a solution generation technique utilizing the symmetries of the reduced Lagrangian. By applying our method on the multi-Reissner-Nordstrom solution in four dimensions, we generate the multi-Reissner-Nordstrom solution in five dimensions. We focus on the five-dimensional solution describing a pair of charged black objects with general masses and electric charges. This solution includes the double Reissner-Nordstrom solution as well as the charged version of the five-dimensional static black Saturn. However, all the black Saturn configurations that we could find present either a conical singularity or a naked singularity. We also obtain a non-extremal configuration of charged black strings that reduces in the extremal limit to a Majumdar-Papapetrou like solution in five dimensions.

  12. Charged Schrodinger black holes

    E-Print Network [OSTI]

    Adams, Allan

    We construct charged and rotating asymptotically Schrdinger black hole solutions of type IIB supergravity. We begin by obtaining a closed-form expression for the null Melvin twist of a broad class of type IIB backgrounds, ...

  13. Helical superconducting black holes

    E-Print Network [OSTI]

    Aristomenis Donos; Jerome P. Gauntlett

    2012-05-17T23:59:59.000Z

    We construct novel static, asymptotically $AdS_5$ black hole solutions with Bianchi VII$_0$ symmetry that are holographically dual to superconducting phases in four spacetime dimensions with a helical p-wave order. We calculate the precise temperature dependence of the pitch of the helical order. At zero temperature the black holes have vanishing entropy and approach domain wall solutions that reveal homogenous, non-isotropic dual ground states with emergent scaling symmetry.

  14. Library Services for Users with Disabilities

    E-Print Network [OSTI]

    Burton, Geoffrey R.

    Library Services for Users with Disabilities Welcome to the University of Bath Library. In support to the Library Your Subject Librarian will be happy to introduce you to the Library and to show you how to use the Library Catalogue and other subject-specific databases. You can find contact details for your librarian

  15. On Black Hole Entropy

    E-Print Network [OSTI]

    Ted Jacobson; Gungwon Kang; Robert C. Myers

    1994-01-03T23:59:59.000Z

    Two techniques for computing black hole entropy in generally covariant gravity theories including arbitrary higher derivative interactions are studied. The techniques are Wald's Noether charge approach introduced recently, and a field redefinition method developed in this paper. Wald's results are extended by establishing that his local geometric expression for the black hole entropy gives the same result when evaluated on an arbitrary cross-section of a Killing horizon (rather than just the bifurcation surface). Further, we show that his expression for the entropy is not affected by ambiguities which arise in the Noether construction. Using the Noether charge expression, the entropy is evaluated explicitly for black holes in a wide class of generally covariant theories. Further, it is shown that the Killing horizon and surface gravity of a stationary black hole metric are invariant under field redefinitions of the metric of the form $\\bar{g}_{ab}\\equiv g_{ab} + \\Delta_{ab}$, where $\\Delta_{ab}$ is a tensor field constructed out of stationary fields. Using this result, a technique is developed for evaluating the black hole entropy in a given theory in terms of that of another theory related by field redefinitions. Remarkably, it is established that certain perturbative, first order, results obtained with this method are in fact {\\it exact}. The possible significance of these results for the problem of finding the statistical origin of black hole entropy is discussed.}

  16. Gasification of black liquor

    SciTech Connect (OSTI)

    Kohl, A.L.

    1987-07-28T23:59:59.000Z

    A process is described for treating a concentrated aqueous black liquor carbonaceous material and alkali metal sulfur compounds to form a combustible gas and a sulfide-rich melt comprising: (a) providing a gasifier vessel maintained at a pressure of from about 1 to 50 atmospheres and containing a relatively shallow molten salt pool at its bottom within a sump equipped with an overflow discharge; (b) introducing into the top of the drying zone the concentrated aqueous black liquor containing carbonaceous material and alkali metal sulfur compounds; (c) evaporating water from the concentrated aqueous black liquor in the drying zone by direct contact of the aqueous black liquor with the hot gas rising from the gasification zone to produce dried black liquor solids; (d) introducing a first portion of an oxygen-containing gas into the gas space in the gasification zone located below the drying zone immediately above the molten salt pool to partially oxidize and gasify a fraction of the carbonaceous material in the dried black liquor solids falling through the zone to form a hot combustible gas; (e) introducing a second portion of the oxygen-containing gas beneath the surface of the molten salt pool in an amount sufficient to cause gasification of essentially all carbonaceous material entering the pool from the gasification zone but not sufficient to create oxidizing conditions in the pool; (f) withdrawing the cooled combustible gas having a higher heating value of at least about 90 Btu/scf (dry basis) from an upper portion of the drying zone; and (g) withdrawing from the overflow discharge in the molten salt reduction zone a melt in which the sulfur content is predominantly in the form of alkali metal sulfide.

  17. Disaster case management and individuals with disabilities

    E-Print Network [OSTI]

    Stough, Laura

    2010-01-01T23:59:59.000Z

    following the 9/11 Twin Towers disaster. Individuals receiving disability- related services were found to require case management for a longer length of time during the long-term recovery period and to be more likely to need housing or financial assistance... disaster case management program in U.S. history. Method Participants Case managers. Two groups of participants were used for data collection. The first group consisted of case managers at NDRN affiliate offices who provided direct support, such as lo...

  18. Trajectories of Happiness Following Acquired Disability

    E-Print Network [OSTI]

    McCord, Carly Elizabeth

    2013-07-09T23:59:59.000Z

    ................................................. 69 3 Reported Ethnicity for the Total Sample at Time 1 ............................................ 70 4 Injury Severity by Injury Type for the Total Sample........................................... 71 5 Tukey Post... disability, they are more likely to employ health-promoting and self-care activities that reduce the risk of both physical (i.e. pressure sores and urinary tract infections) and mental health complications (i.e. anxiety and depression; Elliott et. al...

  19. Accommodations for Physical Disabilities | Department of Energy

    Energy Savers [EERE]

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Delicious RankCombustion |Energy UsageAUDITVehiclesTankless orA BRIEF HISTORY OF THE|Physical Disabilities

  20. Black holes at accelerators.

    E-Print Network [OSTI]

    Webber, Bryan R

    ar X iv :h ep -p h/ 05 11 12 8v 3 6 A pr 2 00 6 Black Holes at Accelerators Bryan Webber Cavendish Laboratory, University of Cambridge, Cambridge CB3 0HE, UK In theories with large extra dimensions and TeV-scale gravity, black holes... 2000 3000 Missing ET (GeV) Ar bi tra ry S ca le p p ? QCD SUSY 5 TeV BH (n=6) 5 TeV BH (n=2) (PT > 600 GeV) (SUGRA point 5) Figure 10: Missing transverse energy for various processes at the LHC. 4.2. Event Characteristics Turning from single...

  1. m:\\disability\\policies\\marking-dyslexia.doc THE UNIVERSITY OF SUSSEX

    E-Print Network [OSTI]

    Sussex, University of

    m:\\disability\\policies\\marking-dyslexia.doc THE UNIVERSITY OF SUSSEX Policy and Procedures for a reason relating to his or her disability. 1.2 Dyslexia is a registered disability under the Disability editor could put right. #12;m:\\disability\\policies\\marking-dyslexia.doc 2.3.2 The written work

  2. Extremal black disks in QCD

    E-Print Network [OSTI]

    Alexey V. Popov

    2008-05-12T23:59:59.000Z

    We argue that in the high energy QCD a true black disk wave function necessarily contains many quarks. This corresponds to necessity of non-vacuum reggeon loops in formation of a black disk. The result comes from decomposition of the black disk S-matrix in characters on group manifold.

  3. Black holes and black strings in plane waves

    E-Print Network [OSTI]

    Julian Le Witt; Simon F. Ross

    2009-10-30T23:59:59.000Z

    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. Hence, the space of asymptotically plane wave solutions is restricted. 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.

  4. Mapping the Hallmarks of Lung Adenocarcinoma with Massively Parallel Sequencing

    E-Print Network [OSTI]

    Lander, Eric S.

    Lung adenocarcinoma, the most common subtype of non-small cell lung cancer, is responsible for more than 500,000 deaths per year worldwide. Here, we report exome and genome sequences of 183 lung adenocarcinoma tumor/normal ...

  5. Comprehensive genomic characterization of squamous cell lung cancers

    E-Print Network [OSTI]

    Lander, Eric S.

    Lung squamous cell carcinoma is a common type of lung cancer, causing approximately 400,000 deaths per year worldwide. Genomic alterations in squamous cell lung cancers have not been comprehensively characterized, and no ...

  6. Gasification of black liquor

    DOE Patents [OSTI]

    Kohl, Arthur L. (Woodland Hills, CA)

    1987-07-28T23:59:59.000Z

    A concentrated aqueous black liquor containing carbonaceous material and alkali metal sulfur compounds is treated in a gasifier vessel containing a relatively shallow molten salt pool at its bottom to form a combustible gas and a sulfide-rich melt. The gasifier vessel, which is preferably pressurized, has a black liquor drying zone at its upper part, a black liquor solids gasification zone located below the drying zone, and a molten salt sulfur reduction zone which comprises the molten salt pool. A first portion of an oxygen-containing gas is introduced into the gas space in the gasification zone immediatley above the molten salt pool. The remainder of the oxygen-containing gas is introduced into the molten salt pool in an amount sufficient to cause gasification of carbonaceous material entering the pool from the gasification zone but not sufficient to create oxidizing conditions in the pool. The total amount of the oxygen-containing gas introduced both above the pool and into the pool constitutes between 25 and 55% of the amount required for complete combustion of the black liquor feed. A combustible gas is withdrawn from an upper portion of the drying zone, and a melt in which the sulfur content is predominantly in the form of alkali metal sulfide is withdrawn from the molten salt sulfur reduction zone.

  7. Gasification of black liquor

    DOE Patents [OSTI]

    Kohl, A.L.

    1987-07-28T23:59:59.000Z

    A concentrated aqueous black liquor containing carbonaceous material and alkali metal sulfur compounds is treated in a gasifier vessel containing a relatively shallow molten salt pool at its bottom to form a combustible gas and a sulfide-rich melt. The gasifier vessel, which is preferably pressurized, has a black liquor drying zone at its upper part, a black liquor solids gasification zone located below the drying zone, and a molten salt sulfur reduction zone which comprises the molten salt pool. A first portion of an oxygen-containing gas is introduced into the gas space in the gasification zone immediately above the molten salt pool. The remainder of the oxygen-containing gas is introduced into the molten salt pool in an amount sufficient to cause gasification of carbonaceous material entering the pool from the gasification zone but not sufficient to create oxidizing conditions in the pool. The total amount of the oxygen-containing gas introduced both above the pool and into the pool constitutes between 25 and 55% of the amount required for complete combustion of the black liquor feed. A combustible gas is withdrawn from an upper portion of the drying zone, and a melt in which the sulfur content is predominantly in the form of alkali metal sulfide is withdrawn from the molten salt sulfur reduction zone. 2 figs.

  8. Black Hole Thermodynamics Today

    E-Print Network [OSTI]

    Ted Jacobson

    1998-01-07T23:59:59.000Z

    A brief survey of the major themes and developments of black hole thermodynamics in the 1990's is given, followed by summaries of the talks on this subject at MG8 together with a bit of commentary, and closing with a look towards the future.

  9. Combustion of black liquor

    SciTech Connect (OSTI)

    Mullen, W.T.

    1989-08-15T23:59:59.000Z

    This patent describes an improvement in the combustion of black liquor in an existing Tomlison recovery boiler unit in which black liquor is sprayed into a furnace in which it is successively dried, pyrolyzed and converted to a bed of solid carbonaceous residue, using a primary air stream and a secondary air stream and the residue is subsequently converted to a smelt. The improvement comprises: the addition of between an effective amount up to 5% oxygen by volume to the primary air stream directed at the bed of solid carbonaceous residue, the amount of oxygen added being sufficient to increase the adiabatic flame temperature, the combustion rate of the solid carbonaceous material, the rate of pyrolysis, the temperature in the lower portion of the furnace, the the drying rate of black liquor droplets, and to decrease the temperature of the gases entering the heat transfer surfaces in the upper portion of the furnace and the rate of deposit formation on the surfaces and wherein the amount of black liquor combusted is increased as compared with the amount combusted in the same furnace operated without the addition of oxygen to the primary air.

  10. Quantum black hole inflation

    E-Print Network [OSTI]

    M. B. Altaie

    2001-05-07T23:59:59.000Z

    In this paper we follow a new approach for particle creation by a localized strong gravitational field. The approach is based on a definition of the physical vacuum drawn from Heisenberg uncertainty principle. Using the fact that the gravitational field red-shifts the frequency modes of the vacuum, a condition on the minimum stregth of the gravitational field required to achieve real particle creation is derived. Application of this requirement on a Schwartzchid black hole resulted in deducing an upper limit on the region, outside the event horizon, where real particles can be created. Using this regional upper limit, and considering particle creation by black holes as a consequence of the Casimir effect, with the assumption that the created quanta are to be added to the initial energy, we deduce a natural power law for the development of the event horizon, and consequently a logarithmic law for the area spectrum of an inflating black hole. Application of the results on a cosmological model shows that if we start with a Planck-dimensional black hole, then through the process of particle creation we end up with a universe having the presently estimated critical density. Such a universe will be in a state of eternal inflation.

  11. Black brane steady states

    E-Print Network [OSTI]

    Amado, Irene

    2015-01-01T23:59:59.000Z

    We follow the evolution of an asymptotically AdS black brane with a fixed temperature gradient at spatial infinity until a steady state is formed. The resulting energy density and energy flux of the steady state in the boundary theory are compared to a conjecture on the behavior of steady states in conformal field theories. Very good agreement is found.

  12. antipsychotics limit disability: Topics by E-print Network

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

    Martin, Ralph R. 49 with Learning Disabilities CiteSeer Summary: Developmental dyslexia is defined as an unexpected difficulty in reading in adults and children who...

  13. agency disability examiners: Topics by E-print Network

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

    Martin, Ralph R. 46 with Learning Disabilities CiteSeer Summary: Developmental dyslexia is defined as an unexpected difficulty in reading in adults and children who...

  14. Instructor Exam Procedures for Students with Disabilities in courses ...

    E-Print Network [OSTI]

    Kelly Beranger

    2014-08-15T23:59:59.000Z

    Instructor Exam Procedures for Students with Disabilities in courses with at least one common exam. This document addresses all courses that have any...

  15. CAREERS & the disABLED Magazine's Career Expo for People with...

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

    People with Disabilities CAREERS & the disABLED Magazine's Career Expo for People with Disabilities November 22, 2013 1:00PM EST Washington DC Contact http:www.eop.comexpos.php...

  16. A Model for Conducting Research with Learning Disabled Adolescents and Young Adults

    E-Print Network [OSTI]

    Meyen, Edward L.; Schiefelbusch, Richard L.; Deshler, Donald D.; Alley, Gordon R.; Schumaker, Jean B.; Clark, Frances L.

    1980-01-01T23:59:59.000Z

    Issues from the field of learning disabilities and the field of education in general which impact the learning disabled individual are discussed as they relate to research with learning disabled adolescents and young adults ...

  17. allergic lung inflammation: Topics by E-print Network

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

    the air pollutants which damage lungs and are linked to respiratory problems such as asthma. A Low symptoms, inflammation in the lung, exposure to traffic-related air...

  18. National Heart, Lung, and Blood Institute

    E-Print Network [OSTI]

    Bandettini, Peter A.

    National Heart, Lung, and Blood Institute A T - A - G L A N C E : Facts About Healthy Weight Why. The more you weigh, the more likely you are to suffer from heart disease, high blood pressure, diabetes indicator of your risk for a variety of diseases. To check your BMI, use the National Heart, Lung, and Blood

  19. National Heart, Lung, and Blood Institute

    E-Print Network [OSTI]

    Bandettini, Peter A.

    National Heart, Lung, and Blood Institute A T - A - G L A N C E : Healthy Sleep S leep is not just on a regular basis increases the risk of high blood pressure, heart disease, and other medical conditions information on healthy sleep and sleep disorders is available from the National Heart, Lung, and Blood

  20. BLACK HOLE AURORA POWERED BY A ROTATING BLACK HOLE

    SciTech Connect (OSTI)

    Takahashi, Masaaki [Department of Physics and Astronomy, Aichi University of Education, Kariya, Aichi 448-8542 (Japan); Takahashi, Rohta, E-mail: takahasi@phyas.aichi-edu.ac.j [Cosmic Radiation Laboratory, Institute of Physical and Chemical Research, 2-1 Hirosawa, Wako, Saitama 351-0198 (Japan)

    2010-05-15T23:59:59.000Z

    We present a model for high-energy emission sources generated by a standing magnetohydrodynamical (MHD) shock in a black hole magnetosphere. The black hole magnetosphere would be constructed around a black hole with an accretion disk, where a global magnetic field could be originated by currents in the accretion disk and its corona. Such a black hole magnetosphere may be considered as a model for the central engine of active galactic nuclei, some compact X-ray sources, and gamma-ray bursts. The energy sources of the emission from the magnetosphere are the gravitational and electromagnetic energies of magnetized accreting matters and the rotational energy of a rotating black hole. When the MHD shock generates in MHD accretion flows onto the black hole, the plasma's kinetic energy and the black hole's rotational energy can convert to radiative energy. In this Letter, we demonstrate the huge energy output at the shock front by showing negative energy postshock accreting MHD flows for a rapidly rotating black hole. This means that the extracted energy from the black hole can convert to the radiative energy at the MHD shock front. When an axisymmetric shock front is formed, we expect a ring-shaped region with very hot plasma near the black hole; this would look like an 'aurora'. The high-energy radiation generated from there would carry to us the information for the curved spacetime due to the strong gravity.

  1. Services for Students with Disabilities Confidentiality Statement Services for Students with Disabilities

    E-Print Network [OSTI]

    Buehrer, R. Michael

    within the SSD office. The SSD office utilizes a secure, password protected, electronic database(s). This Information Disclosure describes how disability information about a student who is registered with the SSD of the personal, educational, and health information entrusted to us. In order to protect this privacy, we have

  2. SDSU-Student Disability Services Page 1 of 5 Student Disability Services

    E-Print Network [OSTI]

    Gallo, Linda C.

    Documentation Guidelines for Learning Disabilities In order to determine eligibility for accommodations include names and titles of the evaluators as well as the date(s) of testing. The following guidelines Achievement Test (WRAT) is not a comprehensive measure of achievement and is therefore not suitable as a sole

  3. Accommodations for Vision Disabilities | Department of Energy

    Energy Savers [EERE]

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Delicious RankCombustion |Energy UsageAUDITVehiclesTankless orA BRIEF HISTORY OF THE|Physical DisabilitiesVision

  4. Disability Employment POCs | Department of Energy

    Office of Environmental Management (EM)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr May Jun Jul(Summary) " ,"ClickPipelinesProvedDecember 2005Department ofDOEDisability Employment POCs Disability Employment POCs

  5. ANNUAL ACCOMPLISHMENT PLAN UPDATE FOR DISABLED VETERANS

    National Nuclear Security Administration (NNSA)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr May Jun Jul(Summary) "ofEarlyEnergyDepartmentNational NuclearhasAdministration77 Sandia National005-2010 orDisabled Veterans

  6. Supermassive Black Holes

    E-Print Network [OSTI]

    Fulvio Melia

    2007-05-10T23:59:59.000Z

    Supermassive black holes have generally been recognized as the most destructive force in nature. But in recent years, they have undergone a dramatic shift in paradigm. These objects may have been critical to the formation of structure in the early universe, spawning bursts of star formation and nucleating proto-galactic condensations. Possibly half of all the radiation produced after the Big Bang may be attributed to them, whose number is now known to exceed 300 million. The most accessible among them is situated at the Center of Our Galaxy. In the following pages, we will examine the evidence that has brought us to this point, and we will understand why many expect to actually image the event horizon of the Galaxy's central black hole within this decade.

  7. Shape of black holes

    E-Print Network [OSTI]

    Clement, Mara E Gabach

    2015-01-01T23:59:59.000Z

    It is well known that celestial bodies tend to be spherical due to gravity and that rotation produces deviations from this sphericity. We discuss what is known and expected about the shape of black holes' horizons from their formation to their final, stationary state. We present some recent results showing that black hole rotation indeed manifests in the widening of their central regions, limits their global shapes and enforces their whole geometry to be close to the extreme Kerr horizon geometry at almost maximal rotation speed. The results depend only on the horizon area and angular momentum. In particular they are entirely independent of the surrounding geometry of the spacetime and of the presence of matter satisfying the strong energy condition. We also discuss the the relation of this result with the Hoop conjecture.

  8. Black Pine Circle Project

    SciTech Connect (OSTI)

    Mytko, Christine

    2014-03-31T23:59:59.000Z

    A group of seventh graders from Black Pine Circle school in Berkeley had the opportunity to experience the Advanced Light Source (ALS) as "users" via a collaborative field trip and proposal project. The project culminated with a field trip to the ALS for all seventh graders, which included a visit to the ALS data visualization room, a diffraction demonstration, a beamline tour, and informative sessions about x-rays and tomography presented by ALS scientists.

  9. Black Pine Circle Project

    ScienceCinema (OSTI)

    Mytko, Christine

    2014-09-15T23:59:59.000Z

    A group of seventh graders from Black Pine Circle school in Berkeley had the opportunity to experience the Advanced Light Source (ALS) as "users" via a collaborative field trip and proposal project. The project culminated with a field trip to the ALS for all seventh graders, which included a visit to the ALS data visualization room, a diffraction demonstration, a beamline tour, and informative sessions about x-rays and tomography presented by ALS scientists.

  10. Graduate Medical Education Committee (GMEC) Policy on Accommodations for Disabilities

    E-Print Network [OSTI]

    Mohaghegh, Shahab

    _the_employability_and_retention_of_persons_with_disabilities_policy http://intranet.wvu.edu/human_resources/procedures/wvuhr37.htm We will work with the University Department of Human Resources and the ADA Coordinator in determining if a resident has a disability and what. The resident is responsible for the costs of verification. Approved by GMEC Taskforce 12/14/06 ACGME

  11. Interactive ergonomic analysis of a physically disabled person's workplace

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    Interactive ergonomic analysis of a physically disabled person's workplace Matthieu Aubry1 , Fr approach for in- teractive ergonomics evaluation, and especially adaptation of physically disabled people's workplaces. After a general survey of existing tools, we describe the requirements to perform ergonomic

  12. Red-black Tree Jingjing Xia

    E-Print Network [OSTI]

    Chen, Yangjun

    Advanced Algorithm Design Red-black Tree Jingjing Xia #12;Red-Black Tree A red-black tree is a binary search tree, and each node contains one extra field: its color, it can be either black or red of the binary search tree. If a binary search tree satisfies all the following red-black properties, it is a red

  13. Black holes in massive gravity

    E-Print Network [OSTI]

    Babichev, Eugeny

    2015-01-01T23:59:59.000Z

    We review the black hole solutions of the ghost-free massive gravity theory and its bimetric extension and outline the main results on the stability of these solutions against small perturbations. Massive (bi)-gravity accommodates exact black hole solutions, analogous to those of General Relativity. In addition to these solutions, hairy black holes -- solutions with no correspondent in General Relativity -- have been found numerically, whose existence is a natural consequence of the absence of the Birkhoff's theorem in these theories. The existence of extra propagating degrees of freedom, makes the stability properties of these black holes richer and more complex than those of General Relativity. In particular, the bi-Schwarzschild black hole exhibits an unstable spherically symmetric mode, while the bi-Kerr geometry is also generically unstable, both against the spherical mode and against superradiant instabilities. If astrophysical black holes are described by these solutions, the superradiant instability o...

  14. Black Hole's 1/N Hair

    E-Print Network [OSTI]

    Gia Dvali; Cesar Gomez

    2012-03-29T23:59:59.000Z

    According to the standard view classically black holes carry no hair, whereas quantum hair is at best exponentially weak. We show that suppression of hair is an artifact of the semi-classical treatment and that in the quantum picture hair appears as an inverse mass-square effect. Such hair is predicted in the microscopic quantum description in which a black hole represents a self-sustained leaky Bose-condensate of N soft gravitons. In this picture the Hawking radiation is the quantum depletion of the condensate. Within this picture we show that quantum black hole physics is fully compatible with continuous global symmetries and that global hair appears with the strength B/N, where B is the global charge swallowed by the black hole. For large charge this hair has dramatic effect on black hole dynamics. Our findings can have interesting astrophysical consequences, such as existence of black holes with large detectable baryonic and leptonic numbers.

  15. Observational Evidence for Black Holes

    E-Print Network [OSTI]

    Ramesh Narayan; Jeffrey E. McClintock

    2014-07-20T23:59:59.000Z

    Astronomers have discovered two populations of black holes: (i) stellar-mass black holes with masses in the range 5 to 30 solar masses, millions of which are present in each galaxy in the universe, and (ii) supermassive black holes with masses in the range 10^6 to 10^{10} solar masses, one each in the nucleus of every galaxy. There is strong circumstantial evidence that all these objects are true black holes with event horizons. The measured masses of supermassive black hole are strongly correlated with properties of their host galaxies, suggesting that these black holes, although extremely small in size, have a strong influence on the formation and evolution of entire galaxies. Spin parameters have recently been measured for a handful of black holes. Based on the data, there is an indication that the kinetic power of at least one class of relativistic jet ejected from accreting black holes may be correlated with black hole spin. If verified, it would suggest that these jets are powered by a generalized Penrose process mediated by magnetic fields.

  16. Why Blue-Collar Blacks Help Less

    E-Print Network [OSTI]

    Smith, Sandra Susan; Young, Kara Alexis

    2013-01-01T23:59:59.000Z

    In Hispanics in the Why Blacks Help Less U.S. Economy, eds.71(1):42-71. Why Blacks Help Less Fernandez, Roberto M. andProblems 49 (1): 11- Why Blacks Help Less Heflin, Coleen M.

  17. Black-white asymmetry in visual perception

    E-Print Network [OSTI]

    Lu, Z.-L.; Sperling, G.

    2012-01-01T23:59:59.000Z

    tion of black and white in human vision. Investi- gativeneural responses to black and white ments are balanced, weand observers. The black white asymmetry with a 1.28 is

  18. Why Blue-Collar Blacks Help Less

    E-Print Network [OSTI]

    Smith, Sandra Susan; Young, Kara Alexis

    2013-01-01T23:59:59.000Z

    Exclude Black Men from Blue-Collar Jobs. Berkeley, CA:How Black and Latino Blue Collar Workers Make Decisionsof Sample Respondents Blue-Collar Latinos Blue-Collar Black

  19. RHIC | Black Holes?

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr May JunDatastreamsmmcrcalgovInstrumentsrucLas ConchasPassive Solar HomePromising Science for1 20115, 2001 MediaBrookhavenBlack Holes at

  20. ARM - Black Forest News

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr May Jun Jul(Summary)morphinanInformation Desert SouthwestTechnologies |NovemberARMContactsARM Engineering6,GermanyBlack Forest News

  1. RHIC | Black Holes?

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr MayAtmosphericNuclear Security Administration the1 -the Mid-Infrared at 278, 298, and 323 K.Office ofMayPVREPORTPortalPriceA/4Black

  2. What Types of Jobs Do People with Disabilities Want? Mohammad Ali Lisa Schur Peter Blanck

    E-Print Network [OSTI]

    Raina, Ramesh

    to employment facing many people with disabilities. Keywords Disability Á Job preference Á Employment barriersWhat Types of Jobs Do People with Disabilities Want? Mohammad Ali · Lisa Schur · Peter Blanck-employed people with disabilities want to work, and if so, what types of jobs do they want? Researchers seeking

  3. Black Stars and Gamma Ray Bursts

    E-Print Network [OSTI]

    Tanmay Vachaspati

    2007-06-08T23:59:59.000Z

    Stars that are collapsing toward forming a black hole but are frozen near the Schwarzschild horizon are termed ``black stars''. Collisions of black stars, in contrast to black hole collisions, may be sources of gamma ray bursts, whose basic parameters are estimated quite simply and are found to be consistent with observed gamma ray bursts. Black star gamma ray bursts should be preceded by gravitational wave emission similar to that from the coalescence of black holes.

  4. Optical black holes and solitons

    E-Print Network [OSTI]

    Shawn Westmoreland

    2010-12-21T23:59:59.000Z

    We exhibit a static, cylindrically symmetric, exact solution to the Euler-Heisenberg field equations (EHFE) and prove that its effective geometry contains (optical) black holes. It is conjectured that there are also soliton solutions to the EHFE which contain black hole geometries.

  5. Entropy of Lovelock Black Holes

    E-Print Network [OSTI]

    Ted Jacobson; Robert C. Myers

    1993-05-06T23:59:59.000Z

    A general formula for the entropy of stationary black holes in Lovelock gravity theories is obtained by integrating the first law of black hole mechanics, which is derived by Hamiltonian methods. The entropy is not simply one quarter of the surface area of the horizon, but also includes a sum of intrinsic curvature invariants integrated over a cross section of the horizon.

  6. Black Holes of Negative Mass

    E-Print Network [OSTI]

    R. B. Mann

    1997-05-06T23:59:59.000Z

    I demonstrate that, under certain circumstances, regions of negative energy density can undergo gravitational collapse into a black hole. The resultant exterior black hole spacetimes necessarily have negative mass and non-trivial topology. A full theory of quantum gravity, in which topology-changing processes take place, could give rise to such spacetimes.

  7. E-Print Network 3.0 - awaiting lung transplantation Sample Search...

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

    www.nejm.org november 22, 2007 2143 Summary: of patients with cystic fibrosis awaiting heart and lung transplantation. J Heart Lung Transplant 1993... original article Lung...

  8. Radiation-induced lung injury

    SciTech Connect (OSTI)

    Rosiello, R.A.; Merrill, W.W. (Yale Univ. Medical Center, New Haven, CT (USA))

    1990-03-01T23:59:59.000Z

    The use of radiation therapy is limited by the occurrence of the potentially fatal clinical syndromes of radiation pneumonitis and fibrosis. Radiation pneumonitis usually becomes clinically apparent from 2 to 6 months after completion of radiation therapy. It is characterized by fever, cough, dyspnea, and alveolar infiltrates on chest roentgenogram and may be difficult to differentiate from infection or recurrent malignancy. The pathogenesis is uncertain, but appears to involve both direct lung tissue toxicity and an inflammatory response. The syndrome may resolve spontaneously or may progress to respiratory failure. Corticosteroids may be effective therapy if started early in the course of the disease. The time course for the development of radiation fibrosis is later than that for radiation pneumonitis. It is usually present by 1 year following irradiation, but may not become clinically apparent until 2 years after radiation therapy. It is characterized by the insidious onset of dyspnea on exertion. It most often is mild, but can progress to chronic respiratory failure. There is no known successful treatment for this condition. 51 references.

  9. When Students Grieve: Teachers of Students With Intellectual Disabilities

    E-Print Network [OSTI]

    McAdams-Ducy, Elizabeth

    2014-04-30T23:59:59.000Z

    of this study was to explore the experiences of teachers who have had elementary students with intellectual disabilities who have lost a parent or guardian. Additionally, this study documented behavioral changes and grief symptoms noted by teachers...

  10. Teaching Shape Recognition to Students with Significant Intellectual Disabilities

    E-Print Network [OSTI]

    Lyon, Kristin Joannou

    2014-05-31T23:59:59.000Z

    disabilities, need mathematics skills to lead productive and independent lives. Geometry skills help students make sense of the world around them. Mastery of shape recognition is a beginning geometry skill that is necessary for progressing to more advanced...

  11. Identification of Learning Disabled Adolescents: A Bayesian Approach

    E-Print Network [OSTI]

    Alley, Gordon R.; Deshler, Donald D.; Warner, Michael M.

    1980-01-01T23:59:59.000Z

    The identification of learning disabled adolescents for program placement is a major concern of school personnel. The identification model discussed in this article addresses an array of problems associated with identification ...

  12. Medicaid managed care: Issues for beneficiaries with disabilities

    E-Print Network [OSTI]

    Hall, Jean P.; Kurth, Noelle K.; Chapman, Shawna L.C.; Shireman, Theresa I.

    2015-01-01T23:59:59.000Z

    - ities during and after this transition. Objective: To document experiences of Medicaid enrollees with disabilities using long-term services and supports during transition to Medicaid managed care in Kansas. Methods: During the spring of 2013, 105 Kansans... with disabilities using Medicaid long-term services and supports (LTSS) were surveyed via telephone or in-person as they transitioned to managed care. Qualitative data analysis of survey responses was conducted to learn more about the issues encountered by people...

  13. Black optic display

    DOE Patents [OSTI]

    Veligdan, James T. (Manorville, NY)

    1997-01-01T23:59:59.000Z

    An optical display includes a plurality of stacked optical waveguides having first and second opposite ends collectively defining an image input face and an image screen, respectively, with the screen being oblique to the input face. Each of the waveguides includes a transparent core bound by a cladding layer having a lower index of refraction for effecting internal reflection of image light transmitted into the input face to project an image on the screen, with each of the cladding layers including a cladding cap integrally joined thereto at the waveguide second ends. Each of the cores is beveled at the waveguide second end so that the cladding cap is viewable through the transparent core. Each of the cladding caps is black for absorbing external ambient light incident upon the screen for improving contrast of the image projected internally on the screen.

  14. Commencement Accessibility for People with Disabilities The Rose Garden Arena allows for the ease of access for people with disabilities to fully enjoy

    E-Print Network [OSTI]

    Bertini, Robert L.

    companion sit with them in the accessible seating section, to allow as many people with disabilitiesCommencement Accessibility for People with Disabilities The Rose Garden Arena allows for the ease of access for people with disabilities to fully enjoy the commencement ceremonies

  15. Thermodynamics of regular black hole

    E-Print Network [OSTI]

    Yun Soo Myung; Yong-Wan Kim; Young-Jai Park

    2008-09-21T23:59:59.000Z

    We investigate thermodynamics for a magnetically charged regular black hole (MCRBH), which comes from the action of general relativity and nonlinear electromagnetics, comparing with the Reissner-Norstr\\"om (RN) black hole in both four and two dimensions after dimensional reduction. We find that there is no thermodynamic difference between the regular and RN black holes for a fixed charge $Q$ in both dimensions. This means that the condition for either singularity or regularity at the origin of coordinate does not affect the thermodynamics of black hole. Furthermore, we describe the near-horizon AdS$_2$ thermodynamics of the MCRBH with the connection of the Jackiw-Teitelboim theory. We also identify the near-horizon entropy as the statistical entropy by using the AdS$_2$/CFT$_1$ correspondence.

  16. Black Hole Interior Mass Formula

    E-Print Network [OSTI]

    Parthapratim Pradhan

    2014-05-06T23:59:59.000Z

    We argue by explicit computations that, although the area product, horizon radii product, entropy product and \\emph {irreducible mass product} of the event horizon and Cauchy horizon are universal, the \\emph{surface gravity product}, \\emph{surface temperature product} and \\emph{Komar energy product} of the said horizons do not seem to be universal for Kerr-Newman (KN) black hole space-time. We show the black hole mass formula on the \\emph{Cauchy horizon} following the seminal work by Smarr\\cite{smarr} for the outer horizon. We also prescribed the \\emph{four} laws of black hole mechanics for the \\emph{inner horizon}. New definition of the extremal limit of a black hole is discussed.

  17. WON EXPOSURE AND LUNG CANCER RISK

    E-Print Network [OSTI]

    unknown authors

    As information on indoor air quality accumulated * it became apparent that radon and its progeny are invariably present in indoor environments and that concentrations may reach unacceptably high levels. The lung cancer excess anong miners exposed to radon progeny raised concern that exposure to radon progeny might also cause lung cancer in the general population. This presentation first provides an ovemiew of radon daughter carcinogenesis, and then reviews the recent BEIR IV report. The report described a statistical model * based on analysis of data from four studies of miners, for estimating the lung cancer risk associated with exposure to radon progeny. Tbe analyses showed that the risk of radon exposure declines with time since exposure and with increasing age. The BEIR IV committee concluded that radon progeny and cigarette smoking interact in a multiplicative fashion and that exposure-dose relationships are similar for exposure in homes and in mines.

  18. Lattice Black Holes

    E-Print Network [OSTI]

    Steven Corley; Ted Jacobson

    1998-03-26T23:59:59.000Z

    We study the Hawking process on lattices falling into static black holes. The motivation is to understand how the outgoing modes and Hawking radiation can arise in a setting with a strict short distance cutoff in the free-fall frame. We employ two-dimensional free scalar field theory. For a falling lattice with a discrete time-translation symmetry we use analytical methods to establish that, for Killing frequency $\\omega$ and surface gravity $\\kappa$ satisfying $\\kappa\\ll\\omega^{1/3}\\ll 1$ in lattice units, the continuum Hawking spectrum is recovered. The low frequency outgoing modes arise from exotic ingoing modes with large proper wavevectors that "refract" off the horizon. In this model with time translation symmetry the proper lattice spacing goes to zero at spatial infinity. We also consider instead falling lattices whose proper lattice spacing is constant at infinity and therefore grows with time at any finite radius. This violation of time translation symmetry is visible only at wavelengths comparable to the lattice spacing, and it is responsible for transmuting ingoing high Killing frequency modes into low frequency outgoing modes.

  19. Fishing in Black Holes

    E-Print Network [OSTI]

    A. Brotas

    2006-09-01T23:59:59.000Z

    The coordinate system $(\\bar{x},\\bar{t})$ defined by $r = 2m + K\\bar{x}- c K \\bar{t}$ and $t=\\bar{x}/cK - 1 /cK \\int_{r_a}^r (1- 2m/r + K^2)^{1/2} (1 - 2m/r)^{-1}dr$ allow us to write the Schwarzschild metric in the form: \\[ds^2=c^2 d\\bar{t}^2 + (W^2/K^2 - 2W/K) d\\bar{x}^2 + 2c (1 + W/K) d\\bar{x}d\\bar{t} - r^2 (d\\theta^2 + cos^2\\theta d\\phi^2)\\] with $W=(1 - 2m/r + K^2)^{1/2}$, in which the coefficients' pathologies are moved to $r_K = 2m/(1+K^2)$. This new coordinate system is used to study the entrance into a black hole of a rigid line (a line in which the shock waves propagate with velocity c).

  20. Red-Black Trees 1 2004 Goodrich, Tamassia Red-Black Trees

    E-Print Network [OSTI]

    Alechina, Natasha

    Red-Black Trees 1© 2004 Goodrich, Tamassia Red-Black Trees 6 3 8 4 v z #12;Red-Black Trees 2© 2004 Goodrich, Tamassia From (2,4) to Red-Black Trees A red-black tree is a representation of a (2,4) tree by means of a binary tree whose nodes are colored red or black In comparison with its associated (2,4) tree

  1. Kraft black liquor delivery systems

    SciTech Connect (OSTI)

    Adams, T.N.; Empie, H.L.; Obuskovic, N.; Spielbauer, T.M.

    1990-02-01T23:59:59.000Z

    Improvement of spray nozzles for black liquor injection into kraft recovery furnaces is expected to result from obtaining a controlled, well-defined droplet size distribution. Work this year has centered on defining the capabilities of commercial black liquor nozzles currently in use. Considerations of the observed mechanism of droplet formation suggest a major revision is needed in the theory of how droplets form from these nozzles. High resolution, high sensitivity video has been shown to be superior to flash x-ray as a technique for measuring the droplet size distribution as well as the formation history. An environmentally sound spray facility capable of spraying black liquor at temperatures up to normal firing conditions is being constructed before data acquisition continues. Preliminary correlations have been developed between liquor properties, nozzle design, and droplet size. Three aspects of nozzle design have been investigated: droplet size distribution, fluid sheet thickness, and flow and pressure drop characteristics. The standard deviation about the median droplet size for black liquor is nearly the same as the for a wide variety of other fluids and nozzle types. Preliminary correlation for fluid sheet thickness on the plate of a splashplate nozzle show the strong similarities of black liquor to other fluids. The flow and pressure drop characteristic of black liquor nozzle, follow a simple two-term relationship similar to other flow devices. This means that in routine mill operation of black liquor nozzles only the fluid acceleration in the nozzle is important, viscous losses are quiet small. 21 refs., 53 figs., 10 tabs.

  2. Influence of Manufacturing Processes on the Performance of Phantom Lungs

    SciTech Connect (OSTI)

    Traub, Richard J.

    2008-10-01T23:59:59.000Z

    Chest counting is an important tool for estimating the radiation dose to individuals who have inhaled radioactive materials. Chest counting systems are calibrated by counting the activity in the lungs of phantoms where the activity in the phantom lungs is known. In the United States a commonly used calibration phantom was developed at the Lawrence Livermore National Laboratory and is referred to as the Livermore Torso Phantom. An important feature of this phantom is that the phantom lungs can be interchanged so that the counting system can be challenged by different combinations of radionuclides and activity. Phantom lungs are made from lung tissue substitutes whose constituents are foaming plastics and various adjuvants selected to make the lung tissue substitute similar to normal healthy lung tissue. Some of the properties of phantom lungs cannot be readily controlled by phantom lung manufacturers. Some, such as density, are a complex function of the manufacturing process, while others, such as elemental composition of the bulk plastic are controlled by the plastics manufacturer without input, or knowledge of the phantom manufacturer. Despite the fact that some of these items cannot be controlled, they can be measured and accounted for. This report describes how manufacturing processes can influence the performance of phantom lungs. It is proposed that a metric that describes the brightness of the lung be employed by the phantom lung manufacturer to determine how well the phantom lung approximates the characteristics of a human lung. For many purposes, the linear attenuation of the lung tissue substitute is an appropriate surrogate for the brightness.

  3. National Heart, Lung, and Blood Institute

    E-Print Network [OSTI]

    Bandettini, Peter A.

    National Heart, Lung, and Blood Institute A T - A - G L A N C E : Lowering Your Blood Pressure foods that are heart healthy and low in salt and sodium. High blood pressure, which is blood pressure is dangerous because it makes your heart work too hard, hardens the walls of your arteries, and can cause

  4. National Heart, Lung, and Blood Institute

    E-Print Network [OSTI]

    Bandettini, Peter A.

    problems, including heart attack, stroke, or even death. Overview Atherosclerosis can affect any artery-rich blood to your heart. CHD can lead to angina (chest pain) and heart attack. CHD is the leading causeNational Heart, Lung, and Blood Institute A T - A - G L A N C E : Atherosclerosis A therosclerosis

  5. National Heart, Lung, and Blood Institute

    E-Print Network [OSTI]

    Bandettini, Peter A.

    National Heart, Lung, and Blood Institute A T - A - G L A N C E : Physical Activity and Your Heart, is that even modest amounts of physi- cal activity are good for your health, especially your heart health activity is the type of physical activity that benefits your heart the most. This type of activity moves

  6. National Heart, Lung, and Blood Institute

    E-Print Network [OSTI]

    Bandettini, Peter A.

    National Heart, Lung, and Blood Institute A T - A - G L A N C E : What You Need To Know About High- tors for heart disease. In fact, the higher your blood cholesterol, the greater your risk of developing heart disease or having a heart attack. Heart disease is the #1 killer of men and women in the United

  7. National Heart, Lung, and Blood Institute

    E-Print Network [OSTI]

    Bandettini, Peter A.

    National Heart, Lung, and Blood Institute A T - A - G L A N C E : Coronary Heart Disease C oronary heart disease (CHD), also called coronary artery disease, is the leading cause of death in the United. These arteries supply your heart muscle with oxygen-rich blood. Plaque is made up of fat, cholesterol, calcium

  8. An fMRI study of multimodal semantic and phonological processing in reading disabled adolescents

    E-Print Network [OSTI]

    2009 /Accepted: 11 September 2009 # The International Dyslexia Association 2009 Abstract Using Dyslexia . fMRI . Performance . Phonology. Reading disability. Semantics Introduction The neurobiology of reading disability An increasing body of research suggests that the core deficit in developmental dyslexia

  9. Hurdling Barriers: Labor and Employment Experiences of Asian Americans with Disabilities

    E-Print Network [OSTI]

    Wong, Peter Joseph

    2012-01-01T23:59:59.000Z

    French (2001) noted that negative attitudes about people with disabilities are sometimes disguised as a broad-French (2001) noted that negative attitudes about people with disabilities are sometimes disguised as a broad-

  10. 1 | P a g e Policy Name: Accessibility for Persons with Disabilities

    E-Print Network [OSTI]

    Carleton University

    personal assistive devices; service animals and support persons. Persons with disabilities and the public of goods and services offered by Carleton University (1) Assistive devices Persons with disabilities are permitted to use personal assistive devices to acces

  11. Energy on black hole spacetimes

    E-Print Network [OSTI]

    Alejandro Corichi

    2012-07-18T23:59:59.000Z

    We consider the issue of defining energy for test particles on a background black hole spacetime. We revisit the different notions of energy as defined by different observers. The existence of a time-like isometry allows for the notion of a total conserved energy to be well defined, and subsequently the notion of a gravitational potential energy is also meaningful. We then consider the situation in which the test particle is adsorbed by the black hole, and analyze the energetics in detail. In particular, we show that the notion of horizon energy es defined by the isolated horizons formalism provides a satisfactory notion of energy compatible with the particle's conserved energy. As another example, we comment a recent proposal to define energy of the black hole as seen by an observer at rest. This account is intended to be pedagogical and is aimed at the level of and as a complement to the standard textbooks on the subject.

  12. Cross{calibration of stroke disability measures: Bayesian analysis of longitudinal ordinal categorical data

    E-Print Network [OSTI]

    West, Mike

    Cross{calibration of stroke disability measures: Bayesian analysis of longitudinal ordinal. Duncan, Sue Min Lai, David B. Matchar Running head: Stroke disability measures. Giovanni Parmigiani; Abstract It is common to assess disability of stroke patients using standardized scales, such as the Rankin

  13. DIVISION OF HOUSING AND FOOD SERVICES SERVICES FOR STUDENTS WITH DISABILITIES

    E-Print Network [OSTI]

    Texas at Austin, University of

    ES 1/14 DIVISION OF HOUSING AND FOOD SERVICES SERVICES FOR STUDENTS WITH DISABILITIES REQUEST with Disabilities (SSD) staff has permission to speak with the Division of Housing and Food Services (DHFS to release disability related information to the Division of Housing and Food Services as it relates to my

  14. DIVISION OF HOUSING AND FOOD SERVICES SERVICES FOR STUDENTS WITH DISABILITIES

    E-Print Network [OSTI]

    Texas at Austin, University of

    ES 4/13 DIVISION OF HOUSING AND FOOD SERVICES SERVICES FOR STUDENTS WITH DISABILITIES REQUEST with Disabilities (SSD) staff has permission to speak with the Division of Housing and Food Services (DHFS to release disability related information to the Division of Housing and Food Services as it relates to my

  15. DIVISION OF HOUSING AND FOOD SERVICES SERVICES FOR STUDENTS WITH DISABILITIES

    E-Print Network [OSTI]

    Texas at Austin, University of

    ES 12/11 DIVISION OF HOUSING AND FOOD SERVICES SERVICES FOR STUDENTS WITH DISABILITIES REQUEST with Disabilities (SSD) staff has permission to speak with the Division of Housing and Food Services (DHFS to release disability related information to the Division of Housing and Food Services as it relates to my

  16. Call for Papers and Panels Unleashing the Black Erotic

    E-Print Network [OSTI]

    Kunkle, Tom

    and the Hypersexuality of Black Women Alternative Modes of Black Love and Family The Politics and Economics of Porn

  17. Black Hills Energy- Solar Power Program

    Broader source: Energy.gov [DOE]

    Black Hills Energy has a performance-based incentive (PBI) for photovoltaic (PV) systems up to 100 kilowatts (kW) in capacity. In exchange for these incentives, Black Hills Energy earns the right...

  18. Black Literary Suite: Kansas Authors Edition

    E-Print Network [OSTI]

    Wiggins, Meredith Joan

    2015-03-04T23:59:59.000Z

    authors were born or lived in the Sunflower State, and their work often reflects their time in Kansas. This Black Literary Suite exhibit highlights four important black writersLangston Hughes, Gwendolyn Brooks, Frank Marshall Davis, and Kevin Young...

  19. Black brane entropy and hydrodynamics

    SciTech Connect (OSTI)

    Booth, Ivan; Heller, Michal P.; Spalinski, Michal [Department of Mathematics and Statistics, Memorial University of Newfoundland, St. John's, Newfoundland and Labrador, A1C 5S7 (Canada); Instituut voor Theoretische Fysica, Universiteit van Amsterdam, Science Park 904, 1090 GL Amsterdam (Netherlands); Soltan Institute for Nuclear Studies, Hoza 69, 00-681 Warsaw (Poland) and Physics Department, University of Bialystok, 15-424 Bialystok (Poland)

    2011-03-15T23:59:59.000Z

    Recent advances in holography have led to the formulation of fluid-gravity duality, a remarkable connection between the hydrodynamics of certain strongly coupled media and dynamics of higher dimensional black holes. This paper introduces a correspondence between phenomenologically defined entropy currents in relativistic hydrodynamics and 'generalized horizons' of near-equilibrium black objects in a dual gravitational description. A general formula is given, expressing the divergence of the entropy current in terms of geometric objects which appear naturally in the gravity dual geometry. The proposed definition is explicitly covariant with respect to boundary diffeomorphisms and reproduces known results when evaluated for the event horizon.

  20. Hawking Emission and Black Hole Thermodynamics

    E-Print Network [OSTI]

    Don N. Page

    2006-12-18T23:59:59.000Z

    A brief review of Hawking radiation and black hole thermodynamics is given, based largely upon hep-th/0409024.

  1. On the nature of black hole entropy

    E-Print Network [OSTI]

    Ted Jacobson

    2000-01-13T23:59:59.000Z

    I argue that black hole entropy counts only those states of a black hole that can influence the outside, and attempt (with only partial success) to defend this claim against various objections, all but one coming from string theory. Implications for the nature of the Bekenstein bound are discussed, and in particular the case for a holographic principle is challenged. Finally, a generalization of black hole thermodynamics to "partial event horizons" in general spacetimes without black holes is proposed.

  2. 6, 34193463, 2006 Black carbon or

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    ACPD 6, 3419­3463, 2006 Black carbon or brown carbon M. O. Andreae and A. Gelencs´er Title Page Chemistry and Physics Discussions Black carbon or brown carbon? The nature of light-absorbing carbonaceous;ACPD 6, 3419­3463, 2006 Black carbon or brown carbon M. O. Andreae and A. Gelencs´er Title Page

  3. White holes and eternal black holes

    E-Print Network [OSTI]

    Stephen D. H. Hsu

    2011-11-16T23:59:59.000Z

    We investigate isolated white holes surrounded by vacuum, which correspond to the time reversal of eternal black holes that do not evaporate. We show that isolated white holes produce quasi- thermal Hawking radiation. The time reversal of this radiation, incident on a black hole precursor, constitutes a special preparation that will cause the black hole to become eternal.

  4. Conservation Assessment for Bloodroot in the Black

    E-Print Network [OSTI]

    Conservation Assessment for Bloodroot in the Black Hills National Forest, South Dakota and Wyoming Forest Service Rocky Mountain Region Black Hills National Forest Custer, South Dakota April 2003 #12;Species Assessment of Bloodroot in the Black Hills National Forest, South Dakota and Wyoming J. Hope

  5. Absorption cross section in Lifshitz black hole

    E-Print Network [OSTI]

    Taeyoon Moon; Yun Soo Myung

    2012-10-05T23:59:59.000Z

    We derive the absorption cross section of a minimally coupled scalar in the Lifshitz black hole obtained from the new massive gravity. The absorption cross section reduces to the horizon area in the low energy and massless limit of s-wave mode propagation, indicating that the Lifshitz black hole also satisfies the universality of low energy absorption cross section for black holes.

  6. Mobility barrier for disabled people DEJOUX, Virginie; ARMOOGUM, Jimmy

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    Mobility barrier for disabled people DEJOUX, Virginie; ARMOOGUM, Jimmy 12 th WCTR, July 11-15, 2010 92 55 88 virginie.dejoux@inrets.fr ARMOOGUM Jimmy INRETS - DEST Site de Marne-la-Vallée. "Le Descartes 2" 2 rue de la Butte Verte 93166 Noisy le grand cedex Telephone: 33 1 45 92 55 79 jimmy

  7. CERTIFICATION OF HEALTH CARE PROVIDER FOR EMPLOYEE'S PREGNANCY DISABILITY

    E-Print Network [OSTI]

    Eirinaki, Magdalini

    CERTIFICATION OF HEALTH CARE PROVIDER FOR EMPLOYEE'S PREGNANCY DISABILITY HUMAN RESOURCES Employee this form to your medical provider. Section II must be fully completed by the health care provider Department/College name: Campus Phone: I authorize my health care provider to complete this form and provide

  8. Donald Byrne (white) vs. Robert James "Bobby" Fischer (black) 1956 White Black

    E-Print Network [OSTI]

    Zirbel, Craig L.

    Donald Byrne (white) vs. Robert James "Bobby" Fischer (black) 1956 White Black 1. Nf3 Nf6 comments here are called "annotation" 2. c4 g6 3. Nc3 Bg7 black bishop sits on long diagonal 4. d4 0-0 white black threatens the queen 7. Qxc4 c6 8. e4 Nbd7 black's knight on b moves to d7 9. Rd1 Nb6 white's rook

  9. University of Southampton Erasmus Scheme -Guidelines for students with specific learning difficulties/dyslexia, disabilities and health conditions

    E-Print Network [OSTI]

    Anderson, Jim

    difficulties/dyslexia, disabilities and health conditions These guidelines aim to supplement those produced

  10. Method and apparatus for measuring lung density by Compton backscattering

    DOE Patents [OSTI]

    Loo, B.W.; Goulding, F.S.

    1988-03-11T23:59:59.000Z

    The density of the lung of a patient suffering from pulmonary edema is monitored by irradiating the lung by a single collimated beam of monochromatic photons and measuring the energies of photons compton back-scattered from the lung by a single high-resolution, high-purity germanium detector. A compact system geometry and a unique data extraction scheme are utilized to minimize systematic errors due to the presence of the chestwall and multiple scattering. 11 figs., 1 tab.

  11. Black Hole Evaporation as a Nonequilibrium Process

    E-Print Network [OSTI]

    Hiromi Saida

    2008-11-11T23:59:59.000Z

    When a black hole evaporates, there arises a net energy flow from the black hole into its outside environment due to the Hawking radiation and the energy accretion onto black hole. Exactly speaking, due to the net energy flow, the black hole evaporation is a nonequilibrium process. To study details of evaporation process, nonequilibrium effects of the net energy flow should be taken into account. In this article we simplify the situation so that the Hawking radiation consists of non-self-interacting massless matter fields and also the energy accretion onto the black hole consists of the same fields. Then we find that the nonequilibrium nature of black hole evaporation is described by a nonequilibrium state of that field, and we formulate nonequilibrium thermodynamics of non-self-interacting massless fields. By applying it to black hole evaporation, followings are shown: (1) Nonequilibrium effects of the energy flow tends to accelerate the black hole evaporation, and, consequently, a specific nonequilibrium phenomenon of semi-classical black hole evaporation is suggested. Furthermore a suggestion about the end state of quantum size black hole evaporation is proposed in the context of information loss paradox. (2) Negative heat capacity of black hole is the physical essence of the generalized second law of black hole thermodynamics, and self-entropy production inside the matter around black hole is not necessary to ensure the generalized second law. Furthermore a lower bound for total entropy at the end of black hole evaporation is given. A relation of the lower bound with the so-called covariant entropy bound conjecture is interesting but left as an open issue.

  12. asthma lung function: Topics by E-print Network

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

    Junfeng Guo; Kalman Palagyi; Kenneth C. Beck; Geoffrey Mclennan 38 Effet of Combined Nitrogen Dioxide and Carbon Nanoparticle Exposure on Lung Function During Computer...

  13. BSW process of the slowly evaporating charged black hole

    E-Print Network [OSTI]

    Liancheng Wang; Feng He; Xiangyun Fu

    2015-02-09T23:59:59.000Z

    In this paper, we study the BSW process of the slowly evaporating charged black hole. It can be found that the BSW process will also arise near black hole horizon when the evaporation of charged black hole is very slow. But now the background black hole does not have to be an extremal black hole, and it will be approximately an extremal black hole unless it is nearly a huge stationary black hole.

  14. Sex-specific differences in hyperoxic lung injury in mice: Implications for acute and chronic lung disease in humans

    SciTech Connect (OSTI)

    Lingappan, Krithika, E-mail: lingappa@bcm.edu [Department of Pediatrics, Section of Neonatology, Texas Children's Hospital, Baylor College of Medicine, 1102 Bates Avenue, MC: FC530.01, Houston, TX 77030 (United States); Jiang, Weiwu; Wang, Lihua; Couroucli, Xanthi I. [Department of Pediatrics, Section of Neonatology, Texas Children's Hospital, Baylor College of Medicine, 1102 Bates Avenue, MC: FC530.01, Houston, TX 77030 (United States); Barrios, Roberto [Department of Pathology and Genomic Medicine, The Methodist Hospital Physician Organization, 6565 Fannin Street, Suite M227, Houston, TX 77030 (United States); Moorthy, Bhagavatula [Department of Pediatrics, Section of Neonatology, Texas Children's Hospital, Baylor College of Medicine, 1102 Bates Avenue, MC: FC530.01, Houston, TX 77030 (United States)

    2013-10-15T23:59:59.000Z

    Sex-specific differences in pulmonary morbidity in humans are well documented. Hyperoxia contributes to lung injury in experimental animals and humans. The mechanisms responsible for sex differences in the susceptibility towards hyperoxic lung injury remain largely unknown. In this investigation, we tested the hypothesis that mice will display sex-specific differences in hyperoxic lung injury. Eight week-old male and female mice (C57BL/6J) were exposed to 72 h of hyperoxia (FiO{sub 2} > 0.95). After exposure to hyperoxia, lung injury, levels of 8-iso-prostaglandin F{sub 2} alpha (8-iso-PGF 2?) (LCMS/MS), apoptosis (TUNEL) and inflammatory markers (suspension bead array) were determined. Cytochrome P450 (CYP)1A expression in the lung was assessed using immunohistochemistry and western blotting. After exposure to hyperoxia, males showed greater lung injury, neutrophil infiltration and apoptosis, compared to air-breathing controls than females. Pulmonary 8-iso-PGF 2? levels were higher in males than females after hyperoxia exposure. Sexually dimorphic increases in levels of IL-6 (F > M) and VEGF (M > F) in the lungs were also observed. CYP1A1 expression in the lung was higher in female mice compared to males under hyperoxic conditions. Overall, our results support the hypothesis that male mice are more susceptible than females to hyperoxic lung injury and that differences in inflammatory and oxidative stress markers contribute to these sex-specific dimorphic effects. In conclusion, this paper describes the establishment of an animal model that shows sex differences in hyperoxic lung injury in a temporal manner and thus has important implications for lung diseases mediated by hyperoxia in humans. - Highlights: Male mice were more susceptible to hyperoxic lung injury than females. Sex differences in inflammatory markers were observed. CYP1A expression was higher in females after hyperoxia exposure.

  15. Lung Cancer: A Classic Example of Tumor Escape and Progression While Providing Opportunities for Immunological Intervention

    E-Print Network [OSTI]

    2012-01-01T23:59:59.000Z

    of lung cancer, Clinical Cancer Research, vol. 4, no. 7,pathogenesis of lung cancer, Annual Review of Physiology,immunoreac- tivity in lung cancer: yet another player in the

  16. Origin of black string instability

    SciTech Connect (OSTI)

    Kudoh, Hideaki [Department of Physics, University of Tokyo, Tokyo 113-0033 (Japan)

    2006-05-15T23:59:59.000Z

    It is argued that many nonextremal black branes exhibit a classical Gregory-Laflamme (GL) instability. Why does the universal instability exist? To find an answer to this question and explore other possible instabilities, we study stability of black strings for all possible types of gravitational perturbation. The perturbations are classified into tensor-, vector-, and scalar-types, according to their behavior on the spherical section of the background metric. The vector and scalar perturbations have exceptional multipole moments, and we have paid particular attention to them. It is shown that for each type of perturbations there is no normalizable negative (unstable) modes, apart from the exceptional mode known as s-wave perturbation which is exactly the GL mode. We discuss the origin of instability and comment on the implication for the correlated-stability conjecture.

  17. Accelerating and rotating black holes

    E-Print Network [OSTI]

    J. B. Griffiths; J. Podolsky

    2005-07-06T23:59:59.000Z

    An exact solution of Einstein's equations which represents a pair of accelerating and rotating black holes (a generalised form of the spinning C-metric) is presented. The starting point is a form of the Plebanski-Demianski metric which, in addition to the usual parameters, explicitly includes parameters which describe the acceleration and angular velocity of the sources. This is transformed to a form which explicitly contains the known special cases for either rotating or accelerating black holes. Electromagnetic charges and a NUT parameter are included, the relation between the NUT parameter $l$ and the Plebanski-Demianski parameter $n$ is given, and the physical meaning of all parameters is clarified. The possibility of finding an accelerating NUT solution is also discussed.

  18. Charged spinning black holes as particle accelerators

    SciTech Connect (OSTI)

    Wei Shaowen; Liu Yuxiao; Guo Heng; Fu Chune [Institute of Theoretical Physics, Lanzhou University, Lanzhou 730000 (China)

    2010-11-15T23:59:59.000Z

    It has recently been pointed out that the spinning Kerr black hole with maximal spin could act as a particle collider with arbitrarily high center-of-mass energy. In this paper, we will extend the result to the charged spinning black hole, the Kerr-Newman black hole. The center-of-mass energy of collision for two uncharged particles falling freely from rest at infinity depends not only on the spin a but also on the charge Q of the black hole. We find that an unlimited center-of-mass energy can be approached with the conditions: (1) the collision takes place at the horizon of an extremal black hole; (2) one of the colliding particles has critical angular momentum; (3) the spin a of the extremal black hole satisfies (1/{radical}(3)){<=}(a/M){<=}1, where M is the mass of the Kerr-Newman black hole. The third condition implies that to obtain an arbitrarily high energy, the extremal Kerr-Newman black hole must have a large value of spin, which is a significant difference between the Kerr and Kerr-Newman black holes. Furthermore, we also show that, for a near-extremal black hole, there always exists a finite upper bound for center-of-mass energy, which decreases with the increase of the charge Q.

  19. Dave Kaminsky Charles L. Black

    E-Print Network [OSTI]

    Edwin D. McKay Thomas L. McNeely Jean C. Persons Neysa P. Pickens Armant C. Touchy Jack S. Zoller 19511935 $50.00 Dave Kaminsky 1938 $200.00 Charles L. Black 1940 $50.00 Harold S. Miropol 1941 $67. Tennison Ben Thompson 1945 $250.00 Paul Finkelstein Harold J. Jacobs Lawrence Kahn 1946 $2,250.00 David W

  20. Black Hole Thermodynamics and Electromagnetism

    E-Print Network [OSTI]

    Burra G. Sidharth

    2005-07-15T23:59:59.000Z

    We show a strong parallel between the Hawking, Beckenstein black hole Thermodynamics and electromagnetism: When the gravitational coupling constant transform into the electromagnetic coupling constant, the Schwarzchild radius, the Beckenstein temperature, the Beckenstein decay time and the Planck mass transform to respectively the Compton wavelength, the Hagedorn temperature, the Compton time and a typical elementary particle mass. The reasons underlying this parallalism are then discussed in detail.

  1. ARM - Measurement - Black carbon concentration

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr May JunDatastreamsmmcrcalgovInstrumentsruc Documentation RUC : XDCResearch Related InformationAcid RainTheimagegovMeasurementsBlack carbon

  2. Red-Black Trees 11/26/2007 11:09 AM Red-Black Trees 1 2004 Goodrich, Tamassia

    E-Print Network [OSTI]

    Alechina, Natasha

    Red-Black Trees 11/26/2007 11:09 AM 1 Red-Black Trees 1© 2004 Goodrich, Tamassia Red-Black Trees 6 3 8 4 v z Red-Black Trees 2© 2004 Goodrich, Tamassia From (2,4) to Red-Black Trees A red-black tree is a representation of a (2,4) tree by means of a binary tree whose nodes are colored red or black In comparison

  3. Red-Black Trees 11/11/2004 10:02 AM Red-Black Trees 1 2004 Goodrich, Tamassia

    E-Print Network [OSTI]

    Alechina, Natasha

    Red-Black Trees 11/11/2004 10:02 AM 1 Red-Black Trees 1© 2004 Goodrich, Tamassia Red-Black Trees 6 3 8 4 v z Red-Black Trees 2© 2004 Goodrich, Tamassia From (2,4) to Red-Black Trees A red-black tree is a representation of a (2,4) tree by means of a binary tree whose nodes are colored red or black In comparison

  4. Cardiac-Sparing Whole Lung IMRT in Children With Lung Metastasis

    SciTech Connect (OSTI)

    Kalapurakal, John A., E-mail: j-kalapurakal@northwestern.edu [Radiation Oncology, Robert H. Lurie Comprehensive Cancer Center, Northwestern University, Chicago, Illinois (United States); Zhang, Yunkai; Kepka, Alan; Zawislak, Brian; Sathiaseelan, Vythialingam [Radiation Oncology, Robert H. Lurie Comprehensive Cancer Center, Northwestern University, Chicago, Illinois (United States)] [Radiation Oncology, Robert H. Lurie Comprehensive Cancer Center, Northwestern University, Chicago, Illinois (United States); Rigsby, Cynthia [Medical Imaging, Children's Memorial Hospital Chicago, Chicago, Illinois (United States)] [Medical Imaging, Children's Memorial Hospital Chicago, Chicago, Illinois (United States); Gopalakrishnan, Mahesh [Radiation Oncology, Robert H. Lurie Comprehensive Cancer Center, Northwestern University, Chicago, Illinois (United States)] [Radiation Oncology, Robert H. Lurie Comprehensive Cancer Center, Northwestern University, Chicago, Illinois (United States)

    2013-03-01T23:59:59.000Z

    Purpose: To demonstrate the dosimetric advantages of cardiac-sparing (CS) intensity modulated radiation therapy (IMRT) in children undergoing whole lung irradiation (WLI). Methods and Materials: Chest CT scans of 22 children who underwent simulation with 3-dimensional (n=10) or 4-dimensional (n=12) techniques were used for this study. Treatment planning was performed using standard anteroposterior-posteroanterior (S-RT) technique and CS-IMRT. Left and right flank fields were added to WLI fields to determine whether CS-IMRT offered any added protection to normal tissues at the junction between these fields. The radiation dose to the lung PTV, cardiac structures, liver, and thyroid were analyzed and compared. Results: CS-IMRT had 4 significant advantages over S-RT: (1) superior cardiac protection (2) superior 4-dimensional lung planning target volume coverage, (3) superior dose uniformity in the lungs with fewer hot spots, and (4) significantly lower dose to the heart when flank RT is administered after WLI. Conclusions: The use of CS-IMRT and 4-dimensional treatment planning has the potential to improve tumor control rates and reduce cardiac toxicity in children receiving WLI.

  5. Entanglement entropy of black holes

    E-Print Network [OSTI]

    Sergey N. Solodukhin

    2011-04-19T23:59:59.000Z

    The entanglement entropy is a fundamental quantity which characterizes the correlations between sub-systems in a larger quantum-mechanical system. For two sub-systems separated by a surface the entanglement entropy is proportional to the area of the surface and depends on the UV cutoff which regulates the short-distance correlations. The geometrical nature of the entanglement entropy calculation is particularly intriguing when applied to black holes when the entangling surface is the black hole horizon. I review a variety of aspects of this calculation: the useful mathematical tools such as the geometry of spaces with conical singularities and the heat kernel method, the UV divergences in the entropy and their renormalization, the logarithmic terms in the entanglement entropy in 4 and 6 dimensions and their relation to the conformal anomalies. The focus in the review is on the systematic use of the conical singularity method. The relations to other known approaches such as 't Hooft's brick wall model and the Euclidean path integral in the optical metric are discussed in detail. The puzzling behavior of the entanglement entropy due to fields which non-minimally couple to gravity is emphasized. The holographic description of the entanglement entropy of the black hole horizon is illustrated on the two- and four-dimensional examples. Finally, I examine the possibility to interpret the Bekenstein-Hawking entropy entirely as the entanglement entropy.

  6. Quantum Geometry and Black Holes

    E-Print Network [OSTI]

    G., J Fernando Barbero

    2015-01-01T23:59:59.000Z

    We present an overall picture of the advances in the description of black hole physics from the perspective of loop quantum gravity. After an introduction that discusses the main conceptual issues we present some details about the classical and quantum geometry of isolated horizons and their quantum geometry and then use this scheme to give a natural definition of the entropy of black holes. The entropy computations can be neatly expressed in the form of combinatorial problems solvable with the help of methods based on number theory and the use of generating functions. The recovery of the Bekenstein-Hawking law and corrections to it is explained in some detail. After this, due attention is paid to the discussion of semiclassical issues. An important point in this respect is the proper interpretation of the horizon area as the energy that should appear in the statistical-mechanical treatment of the black hole model presented here. The chapter ends with a comparison between the microscopic and semiclassical app...

  7. Dose impact in radiographic lung injury following lung SBRT: Statistical analysis and geometric interpretation

    SciTech Connect (OSTI)

    Yu, Victoria; Kishan, Amar U.; Cao, Minsong; Low, Daniel; Lee, Percy; Ruan, Dan, E-mail: druan@mednet.ucla.edu [Department of Radiation Oncology, David Geffen School of Medicine, University of California, Los Angeles, Los Angeles, California 90024 (United States)] [Department of Radiation Oncology, David Geffen School of Medicine, University of California, Los Angeles, Los Angeles, California 90024 (United States)

    2014-03-15T23:59:59.000Z

    Purpose: To demonstrate a new method of evaluating dose response of treatment-induced lung radiographic injury post-SBRT (stereotactic body radiotherapy) treatment and the discovery of bimodal dose behavior within clinically identified injury volumes. Methods: Follow-up CT scans at 3, 6, and 12 months were acquired from 24 patients treated with SBRT for stage-1 primary lung cancers or oligometastic lesions. Injury regions in these scans were propagated to the planning CT coordinates by performing deformable registration of the follow-ups to the planning CTs. A bimodal behavior was repeatedly observed from the probability distribution for dose values within the deformed injury regions. Based on a mixture-Gaussian assumption, an Expectation-Maximization (EM) algorithm was used to obtain characteristic parameters for such distribution. Geometric analysis was performed to interpret such parameters and infer the critical dose level that is potentially inductive of post-SBRT lung injury. Results: The Gaussian mixture obtained from the EM algorithm closely approximates the empirical dose histogram within the injury volume with good consistency. The average Kullback-Leibler divergence values between the empirical differential dose volume histogram and the EM-obtained Gaussian mixture distribution were calculated to be 0.069, 0.063, and 0.092 for the 3, 6, and 12 month follow-up groups, respectively. The lower Gaussian component was located at approximately 70% prescription dose (35 Gy) for all three follow-up time points. The higher Gaussian component, contributed by the dose received by planning target volume, was located at around 107% of the prescription dose. Geometrical analysis suggests the mean of the lower Gaussian component, located at 35 Gy, as a possible indicator for a critical dose that induces lung injury after SBRT. Conclusions: An innovative and improved method for analyzing the correspondence between lung radiographic injury and SBRT treatment dose has been demonstrated. Bimodal behavior was observed in the dose distribution of lung injury after SBRT. Novel statistical and geometrical analysis has shown that the systematically quantified low-dose peak at approximately 35 Gy, or 70% prescription dose, is a good indication of a critical dose for injury. The determined critical dose of 35 Gy resembles the critical dose volume limit of 30 Gy for ipsilateral bronchus in RTOG 0618 and results from previous studies. The authors seek to further extend this improved analysis method to a larger cohort to better understand the interpatient variation in radiographic lung injury dose response post-SBRT.

  8. Design considerations for vehicular modifications to accommodate the disabled driver

    E-Print Network [OSTI]

    Swarts, Albert Edwin

    1973-01-01T23:59:59.000Z

    of functions to available members. The concepts are for control of an auto- mobile with a single hand (fully intact arm) or a single foot (fully intact leg) . Other varieties of disabilities (having neither a fully intact arm nor a fully intact leg) may... Modifications Single-Footed Controller Vehicle Modifications Pedal Description Auxiliary Controls Adaptability for Special Applications 6. SAFETY CONSIDERATIONS 52 56 63 65 66 67 70 72 74 General Vehicular Safety Safety Features of the Pistol...

  9. Lung Toxicity and Mutagenicity of Emissions From Heavy-Duty Compressed...

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

    Lung Toxicity and Mutagenicity of Emissions From Heavy-Duty Compressed Natural Gas (CNG)-Powered Vehicles Lung Toxicity and Mutagenicity of Emissions From Heavy-Duty Compressed...

  10. E-Print Network 3.0 - american lung association Sample Search...

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

    or bubble- related phenomena in lung alveoli. Let us further evaluate... COMPARISON OF MOUSE AND RABBIT LUNG DAMAGE EXPOSURE TO 30 kHz ... Source: Illinois at...

  11. E-Print Network 3.0 - a549 lung adenocarcinoma Sample Search...

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

    Collection: Mathematics 48 TP53 gene mutations of lung cancer patients in upper northern Thailand and environmental risk factors Summary: TP53 gene mutations of lung cancer...

  12. E-Print Network 3.0 - asbestos-related lung cancer Sample Search...

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

    the level of risk for lung and other cancers. Methods We performed a meta... household coal use and lung cancer risk, and to explore ... Source: Collection: Environmental...

  13. E-Print Network 3.0 - agricultural lung diseases Sample Search...

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

    Biology and Medicine 18 TP53 gene mutations of lung cancer patients in upper northern Thailand and environmental risk factors Summary: TP53 gene mutations of lung cancer...

  14. E-Print Network 3.0 - automated lung nodule Sample Search Results

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

    Information Sciences 2 STATISTICAL MODELING OF THE LUNG NODULES IN LOW DOSE COMPUTED TOMOGRAPHY SCANS OF THE CHEST Summary: STATISTICAL MODELING OF THE LUNG NODULES IN LOW DOSE...

  15. E-Print Network 3.0 - attenuates paraquat-induced lung Sample...

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

    area of the lung using X-ray attenuation data... Lung Assessment Using Computer Tomography A software program that determines the weight, tissue... composition and various...

  16. E-Print Network 3.0 - attenuates age-related lung Sample Search...

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

    area of the lung using X-ray attenuation data... Lung Assessment Using Computer Tomography A software program that determines the weight, tissue... composition and various...

  17. Combustion properties of Kraft Black Liquors

    SciTech Connect (OSTI)

    Frederick, W.J. Jr.; Hupa, M. (Aabo Akademi, Turku (Finland))

    1993-04-01T23:59:59.000Z

    In a previous study of the phenomena involved in the combustion of black liquor droplets a numerical model was developed. The model required certain black liquor specific combustion information which was then not currently available, and additional data were needed for evaluating the model. The overall objectives of the project reported here was to provide experimental data on key aspects of black liquor combustion, to interpret the data, and to put it into a form which would be useful for computational models for recovery boilers. The specific topics to be investigated were the volatiles and char carbon yields from pyrolysis of single black liquor droplets; a criterion for the onset of devolatilization and the accompanying rapid swelling; and the surface temperature of black liquor droplets during pyrolysis, combustion, and gasification. Additional information on the swelling characteristics of black liquor droplets was also obtained as part of the experiments conducted.

  18. NF-{kappa}B signaling is activated and confers resistance to apoptosis in three-dimensionally cultured EGFR-mutant lung adenocarcinoma cells

    SciTech Connect (OSTI)

    Sakuma, Yuji, E-mail: ysakuma@gancen.asahi.yokohama.jp [Molecular Pathology and Genetics Division, Kanagawa Cancer Center Research Institute, Yokohama (Japan)] [Molecular Pathology and Genetics Division, Kanagawa Cancer Center Research Institute, Yokohama (Japan); Yamazaki, Yukiko; Nakamura, Yoshiyasu; Yoshihara, Mitsuyo; Matsukuma, Shoichi; Koizume, Shiro; Miyagi, Yohei [Molecular Pathology and Genetics Division, Kanagawa Cancer Center Research Institute, Yokohama (Japan)] [Molecular Pathology and Genetics Division, Kanagawa Cancer Center Research Institute, Yokohama (Japan)

    2012-07-13T23:59:59.000Z

    Highlights: Black-Right-Pointing-Pointer EGFR-mutant cells in 3D culture resist EGFR inhibition compared with suspended cells. Black-Right-Pointing-Pointer Degradation of I{kappa}B and activation of NF-{kappa}B are observed in 3D-cultured cells. Black-Right-Pointing-Pointer Inhibiting NF-{kappa}B enhances the efficacy of the EGFR inhibitor in 3D-cultured cells. -- Abstract: Epidermal growth factor receptor (EGFR)-mutant lung adenocarcinoma cells in suspension undergo apoptosis to a greater extent than adherent cells in a monolayer when EGFR autophosphorylation is inhibited by EGFR tyrosine kinase inhibitors (TKIs). This suggests that cell adhesion to a culture dish may activate an anti-apoptotic signaling pathway other than the EGFR pathway. Since the microenvironment of cells cultured in a monolayer are substantially different to that of cells existing in three-dimension (3D) in vivo, we assessed whether two EGFR-mutant lung adenocarcinoma cell lines, HCC827 and H1975, were more resistant to EGFR TKI-induced apoptosis when cultured in a 3D extracellular matrix (ECM) as compared with in suspension. The ECM-adherent EGFR-mutant cells in 3D were significantly less sensitive to treatment with WZ4002, an EGFR TKI, than the suspended cells. Further, a marked degradation of I{kappa}B{alpha}, the inhibitor of nuclear factor (NF)-{kappa}B, was observed only in the 3D-cultured cells, leading to an increase in the activation of NF-{kappa}B. Moreover, the inhibition of NF-{kappa}B with pharmacological inhibitors enhanced EGFR TKI-induced apoptosis in 3D-cultured EGFR-mutant cells. These results suggest that inhibition of NF-{kappa}B signaling would render ECM-adherent EGFR-mutant lung adenocarcinoma cells in vivo more susceptible to EGFR TKI-induced cell death.

  19. Investigating the initiation and progression of small cell lung cancer

    E-Print Network [OSTI]

    Brauneis, Alison Dooley

    2011-01-01T23:59:59.000Z

    Small cell lung cancer (SCLC) comprises 18% of all lung cancer cases and is an aggressive disease with a five-year survival rate of less than 5%, mainly due to the advanced nature of the disease at the time of diagnosis. ...

  20. Lung Cancer and Arsenic Concentrations in Drinking Water in Chile

    E-Print Network [OSTI]

    California at Berkeley, University of

    Lung Cancer and Arsenic Concentrations in Drinking Water in Chile Catterina Ferreccio,1,2 Claudia in northern Chile had arsenic concentrations of 860 g/liter in drinking water in the period 1958­1970. Concen and arsenic in drinking water in northern Chile in a case-control study involving patients diagnosed with lung

  1. Dirac Quasinormal modes of MSW black holes

    E-Print Network [OSTI]

    Sebastian, Saneesh

    2014-01-01T23:59:59.000Z

    In this paper we study the Dirac quasinormal modes of an uncharged 2 + 1 black hole proposed by Mandal et. al and referred to as MSW black hole in this work. The quasi- normal mode is studied using WKB approximation method. The study shows that the imaginary part of quasinormal frequencies increases indicating that the oscillations are damping and hence the black hole is stable against Dirac perturbations.

  2. Dirac Quasinormal modes of MSW black holes

    E-Print Network [OSTI]

    Saneesh Sebastian; V. C. Kuriakose

    2014-01-15T23:59:59.000Z

    In this paper we study the Dirac quasinormal modes of an uncharged 2 + 1 black hole proposed by Mandal et. al and referred to as MSW black hole in this work. The quasi- normal mode is studied using WKB approximation method. The study shows that the imaginary part of quasinormal frequencies increases indicating that the oscillations are damping and hence the black hole is stable against Dirac perturbations.

  3. Black hole entropy: inside or out?

    E-Print Network [OSTI]

    Ted Jacobson; Donald Marolf; Carlo Rovelli

    2005-01-14T23:59:59.000Z

    A trialogue. Ted, Don, and Carlo consider the nature of black hole entropy. Ted and Carlo support the idea that this entropy measures in some sense ``the number of black hole microstates that can communicate with the outside world.'' Don is critical of this approach, and discussion ensues, focusing on the question of whether the first law of black hole thermodynamics can be understood from a statistical mechanics point of view.

  4. Spinning Black Holes as Particle Accelerators

    E-Print Network [OSTI]

    Ted Jacobson; Thomas P. Sotiriou

    2010-01-21T23:59:59.000Z

    It has recently been pointed out that particles falling freely from rest at infinity outside a Kerr black hole can in principle collide with arbitrarily high center of mass energy in the limiting case of maximal black hole spin. Here we aim to elucidate the mechanism for this fascinating result, and to point out its practical limitations, which imply that ultra-energetic collisions cannot occur near black holes in nature.

  5. Probing the Constituent Structure of Black Holes

    E-Print Network [OSTI]

    Lukas Gruending; Stefan Hofmann; Sophia Mller; Tehseen Rug

    2014-12-12T23:59:59.000Z

    We calculate the cross section for scattering processes between graviton emitters on the near side of a Schwarzschild surface and absorbers on its far side, that is black hole constituents. We show that these scatterings allow to directly extract structural observables such as the momentum distribution of black hole constituents. For this we employ a quantum bound state description originally developed in quantum chromodynamics and recently applied to general relativity that allows to consider black holes in a relativistic Hartree like framework.

  6. Remarks on Renormalization of Black Hole Entropy

    E-Print Network [OSTI]

    Sang Pyo Kim; Sung Ku Kim; Kwang-Sup Soh; Jae Hyung Yee

    1996-07-07T23:59:59.000Z

    We elaborate the renormalization process of entropy of a nonextremal and an extremal Reissner-Nordstr\\"{o}m black hole by using the Pauli-Villars regularization method, in which the regulator fields obey either the Bose-Einstein or Fermi-Dirac distribution depending on their spin-statistics. The black hole entropy involves only two renormalization constants. We also discuss the entropy and temperature of the extremal black hole.

  7. Absorption cross section of RN black hole

    E-Print Network [OSTI]

    Sini R.; V. C. Kuriakose

    2007-08-23T23:59:59.000Z

    The behavior of a charged scalar field in the RN black hole space time is studied using WKB approximation. In the present work it is assumed that matter waves can get reflected from the event horizon. Using this effect, the Hawking temperature and the absorption cross section for RN black hole placed in a charged scalar field are calculated. The absorption cross section $\\sigma _{abs}$ is found to be inversely proportional to square of the Hawking temperature of the black hole.

  8. Black holes with massive graviton hair

    E-Print Network [OSTI]

    Richard Brito; Vitor Cardoso; Paolo Pani

    2013-09-03T23:59:59.000Z

    No-hair theorems exclude the existence of nontrivial scalar and massive vector hair outside four-dimensional, static, asymptotically flat black-hole spacetimes. We show, by explicitly building nonlinear solutions, that black holes can support massive graviton hair in theories of massive gravity. These hairy solutions are, most likely, the generic end state of the recently discovered monopole instability of Schwarzschild black holes in massive graviton theories.

  9. Red-black Trees To know what a red-black tree is (10.1).

    E-Print Network [OSTI]

    Liang, Y. Daniel

    809 CHAPTER 10 Red-black Trees Objectives · To know what a red-black tree is (§10.1). · To convert a red-black tree to a 2-4 tree and vice versa (§10.2). · To design the RBTree class that extends the BinaryTree class (§10.3). · To insert an element in a red-black tree and resolve the double red problem

  10. Destroying black holes with test bodies

    E-Print Network [OSTI]

    Ted Jacobson; Thomas P. Sotiriou

    2010-06-09T23:59:59.000Z

    If a black hole can accrete a body whose spin or charge would send the black hole parameters over the extremal limit, then a naked singularity would presumably form, in violation of the cosmic censorship conjecture. We review some previous results on testing cosmic censorship in this way using the test body approximation, focusing mostly on the case of neutral black holes. Under certain conditions a black hole can indeed be over-spun or over-charged in this approximation, hence radiative and self-force effects must be taken into account to further test cosmic censorship.

  11. Black Liquor Research Program symposium: proceedings

    SciTech Connect (OSTI)

    Emerson, D.B.; Whitworth, B.A.

    1985-03-01T23:59:59.000Z

    In the paper pulp industry's recovery boilers, black liquor is sprayed in through nozzle guns near the top of the furnace. This report includes eight papers. (DLC)

  12. Black Hills Power- Commercial Energy Efficiency Programs

    Broader source: Energy.gov [DOE]

    Black Hills Power provides rebates for its commercial customers who install energy efficient heat pumps, motors, variable frequency drives, lighting, and water heaters. Custom rebates for approved...

  13. Black Hills Power- Residential Customer Rebate Program

    Broader source: Energy.gov [DOE]

    Black Hills Power offers cash rebates to residential customers who purchase and install energy efficient equipment in their homes. Incentives exist for water heaters, demand control units, air...

  14. Lower Dimensional Black Holes: Inside and Out

    E-Print Network [OSTI]

    R. B. Mann

    1995-01-27T23:59:59.000Z

    I survey the physics of black holes in two and three spacetime dimensions, with special attention given to an understanding of their exterior and interior properties.

  15. International House Collection / William Black (collector)

    E-Print Network [OSTI]

    Handy, Todd C.

    International House Collection / William Black (collector) Revised by Erwin Wodarczak (2010 (collector). 1950-1953. 45 p. of textual records. Biographical Sketch Born in London, England, William

  16. Black Holes: from Speculations to Observations

    E-Print Network [OSTI]

    Thomas W. Baumgarte

    2006-04-13T23:59:59.000Z

    This paper provides a brief review of the history of our understanding and knowledge of black holes. Starting with early speculations on ``dark stars'' I discuss the Schwarzschild "black hole" solution to Einstein's field equations and the development of its interpretation from "physically meaningless" to describing the perhaps most exotic and yet "most perfect" macroscopic object in the universe. I describe different astrophysical black hole populations and discuss some of their observational evidence. Finally I close by speculating about future observations of black holes with the new generation of gravitational wave detectors.

  17. Superconducting Hair on Charged Black String Background

    E-Print Network [OSTI]

    Lukasz Nakonieczny; Marek Rogatko

    2012-01-25T23:59:59.000Z

    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.

  18. A new spin on black hole hair

    E-Print Network [OSTI]

    Herdeiro, Carlos A R

    2014-01-01T23:59:59.000Z

    We show that scalar hair can be added to rotating, vacuum black holes of general relativity. These hairy black holes (HBHs) clarify a lingering question concerning gravitational solitons: if a black hole can be added at the centre of a boson star, as it typically can for other solitons. We argue that it can, but only if it is spinning. The existence of such HBHs is related to the Kerr superradiant instability triggered by a massive scalar field. This connection leads to the following conjecture: a (hairless) black hole which is afflicted by the superradiant instability of a given field must allow hairy generalizations with that field.

  19. Black Swans, Dragons-Kings and Prediction Black Swan (Cygnus atratus)

    E-Print Network [OSTI]

    Black Swans, Dragons-Kings and Prediction Black Swan (Cygnus atratus) www.er.ethz.ch Didier hurricanes normalized to 1995 dollars by inflation, personal property increases and coastal county population;12 2008 FINANCIAL CRISIS #12;Crises are not but "Dragon-kings" Dragon-king hypothesis #12;Black Swan story

  20. National Society of Black EngineersNational Society of Black Engineers Columbia University Chapter

    E-Print Network [OSTI]

    Hone, James

    National Society of Black EngineersNational Society of Black Engineers Columbia University Chapter #12;Columbia University Greetings NSBE Family and Friends! My name is Ken Yearwood, the 2008-2009 Columbia University NSBE (National Society of Black Engineers) Chapter President. On behalf of the Columbia

  1. Memory and normal ageing in adults with intellectual disabilities : a research portfolio

    E-Print Network [OSTI]

    McPaul, Ann

    2014-07-01T23:59:59.000Z

    Background: Assessment of dementia in adults with intellectual disabilities poses specific challenges. Firstly, there is a paucity of validated, standardised and appropriate neuropsychological assessments of memory for ...

  2. Mothers with Learning Disabilities' Experience of Relationships with their Parents, Partners and Friends: An IPA study .

    E-Print Network [OSTI]

    Scully, Tamara

    2009-01-01T23:59:59.000Z

    ??Many mothers with learning disabilities experience social isolation (McGaw, 1998; Booth & Booth, 1996) despite current research clearly delineating the importance of supportive relationships for (more)

  3. E-Print Network 3.0 - amc linear disability Sample Search Results

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

    search results for: amc linear disability Page: << < 1 2 3 4 5 > >> 1 American Mathematics Competitions AMC 1012 A Summary: for individual awards. Students with Visual or...

  4. Power/knowledge in an age of reform| General education teachers and discourses of disability.

    E-Print Network [OSTI]

    Lightman, Timohty

    2015-01-01T23:59:59.000Z

    ?? In this qualitative study, comprised of interviews and observations, I explore how discourses of disability circulating within the epistemologies and practices of four general (more)

  5. Deep Frames, White Men's Discourse, and Black Female Bodies

    E-Print Network [OSTI]

    Slatton, Brittany C.

    2012-02-14T23:59:59.000Z

    In this qualitative study, I examine the persistent trend of black women as an excluded relationship partner for white men. Integral to understanding the exclusion of black women as relationship partners is the construction of black female bodies...

  6. Causticizing for Black Liquor Gasifiers

    SciTech Connect (OSTI)

    Scott Sinquefeld; James Cantrell; Xiaoyan Zeng; Alan Ball; Jeff Empie

    2009-01-07T23:59:59.000Z

    The cost-benefit outlook of black liquor gasification (BLG) could be greatly improved if the smelt causticization step could be achieved in situ during the gasification step. Or, at a minimum, the increase in causticizing load associated with BLG could be mitigated. A number of chemistries have been proven successful during black liquor combustion. In this project, three in situ causticizing processes (titanate, manganate, and borate) were evaluated under conditions suitable for high temperature entrained flow BLG, and low temperature steam reforming of black liquor. The evaluation included both thermodynamic modeling and lab experimentation. Titanate and manganate were tested for complete direct causticizing (to thus eliminate the lime cycle), and borates were evaluated for partial causticizing (to mitigate the load increase associated with BLG). Criteria included high carbonate conversion, corresponding hydroxide recovery upon hydrolysis, non process element (NPE) removal, and economics. Of the six cases (three chemistries at two BLG conditions), only two were found to be industrially viable: titanates for complete causticizing during high temperature BLG, and borates for partial causticizing during high temperature BLG. These two cases were evaluated for integration into a gasification-based recovery island. The Larsen [28] BLG cost-benefit study was used as a reference case for economic forecasting (i.e. a 1500 tpd pulp mill using BLG and upgrading the lime cycle). By comparison, using the titanate direct causticizing process yielded a net present value (NPV) of $25M over the NPV of BLG with conventional lime cycle. Using the existing lime cycle plus borate autocausticizing for extra capacity yielded a NPV of $16M.

  7. REFRACTORY FOR BLACK LIQUOR GASIFIERS

    SciTech Connect (OSTI)

    William L. Headrick Jr; Musa Karakus; Jun Wei

    2005-03-01T23:59:59.000Z

    The University of Missouri-Rolla will identify materials that will permit the safe, reliable and economical operation of combined cycle gasifiers by the pulp and paper industry. The primary emphasis of this project will be to resolve the material problems encountered during the operation of low-pressure high-temperature (LPHT) and low-pressure low-temperature (LPLT) gasifiers while simultaneously understanding the materials barriers to the successful demonstration of high-pressure high-temperature (HPHT) black liquor gasifiers. This study will define the chemical, thermal and physical conditions in current and proposed gasifier designs and then modify existing materials and develop new materials to successfully meet the formidable material challenges. Resolving the material challenges of black liquor gasification combined cycle technology will provide energy, environmental, and economic benefits that include higher thermal efficiencies, up to three times greater electrical output per unit of fuel, and lower emissions. In the near term, adoption of this technology will allow the pulp and paper industry greater capital effectiveness and flexibility, as gasifiers are added to increase mill capacity. In the long term, combined-cycle gasification will lessen the industry's environmental impact while increasing its potential for energy production, allowing the production of all the mill's heat and power needs along with surplus electricity being returned to the grid. An added benefit will be the potential elimination of the possibility of smelt-water explosions, which constitute an important safety concern wherever conventional Tomlinson recovery boilers are operated. Developing cost-effective materials with improved performance in gasifier environments may be the best answer to the material challenges presented by black liquor gasification. Refractory materials may be selected/developed that either react with the gasifier environment to form protective surfaces in-situ; are functionally-graded to give the best combination of thermal, mechanical, and physical properties and chemical stability; or are relatively inexpensive, reliable repair materials. This report covers Task 1.3, Simulative corrosion of candidate materials developed by refractory producers and in the laboratory based on the results of Task 1.1 and Task 1.2. Refractories provided by in-kind sponsors were tested by cup testing, density/porosity determinations, chemical analysis and microscopy. The best performing materials in the cup testing were fused cast materials. However, 2 castables appear to outperforming any of the previously tested materials and may perform better than the fused cast materials in operation. The basis of the high performance of these materials is the low open porosity and permeability to black liquor smelt.

  8. Multi-walled carbon nanotube-induced gene expression in the mouse lung: Association with lung pathology

    SciTech Connect (OSTI)

    Pacurari, M. [Mary Babb Randolph Cancer Center, West Virginia University, Morgantown, WV 26506-9300 (United States); Qian, Y., E-mail: yaq2@cdc.gov [Pathology and Physiology Research Branch, Health Effects Laboratory Division, National Institute for Occupational Safety and Health, Morgantown, WV 26505 (United States); Porter, D.W.; Wolfarth, M. [Pathology and Physiology Research Branch, Health Effects Laboratory Division, National Institute for Occupational Safety and Health, Morgantown, WV 26505 (United States); Wan, Y.; Luo, D. [Mary Babb Randolph Cancer Center, West Virginia University, Morgantown, WV 26506-9300 (United States); Ding, M. [Pathology and Physiology Research Branch, Health Effects Laboratory Division, National Institute for Occupational Safety and Health, Morgantown, WV 26505 (United States); Castranova, V. [Mary Babb Randolph Cancer Center, West Virginia University, Morgantown, WV 26506-9300 (United States); Pathology and Physiology Research Branch, Health Effects Laboratory Division, National Institute for Occupational Safety and Health, Morgantown, WV 26505 (United States); Guo, N.L., E-mail: lguo@hsc.wvu.edu [Mary Babb Randolph Cancer Center, West Virginia University, Morgantown, WV 26506-9300 (United States); Department of Community Medicine, School of Medicine, West Virginia University, Morgantown, WV 26506-9190 (United States)

    2011-08-15T23:59:59.000Z

    Due to the fibrous shape and durability of multi-walled carbon nanotubes (MWCNT), concerns regarding their potential for producing environmental and human health risks, including carcinogenesis, have been raised. This study sought to investigate how previously identified lung cancer prognostic biomarkers and the related cancer signaling pathways are affected in the mouse lung following pharyngeal aspiration of well-dispersed MWCNT. A total of 63 identified lung cancer prognostic biomarker genes and major signaling biomarker genes were analyzed in mouse lungs (n = 80) exposed to 0, 10, 20, 40, or 80 {mu}g of MWCNT by pharyngeal aspiration at 7 and 56 days post-exposure using quantitative PCR assays. At 7 and 56 days post-exposure, a set of 7 genes and a set of 11 genes, respectively, showed differential expression in the lungs of mice exposed to MWCNT vs. the control group. Additionally, these significant genes could separate the control group from the treated group over the time series in a hierarchical gene clustering analysis. Furthermore, 4 genes from these two sets of significant genes, coiled-coil domain containing-99 (Ccdc99), muscle segment homeobox gene-2 (Msx2), nitric oxide synthase-2 (Nos2), and wingless-type inhibitory factor-1 (Wif1), showed significant mRNA expression perturbations at both time points. It was also found that the expression changes of these 4 overlapping genes at 7 days post-exposure were attenuated at 56 days post-exposure. Ingenuity Pathway Analysis (IPA) found that several carcinogenic-related signaling pathways and carcinogenesis itself were associated with both the 7 and 11 gene signatures. Taken together, this study identifies that MWCNT exposure affects a subset of lung cancer biomarkers in mouse lungs. - Research Highlights: > Multi-Walled Carbon Nanotubes affect lung cancer biomarkers in mouse lungs. > The results suggest potentially harmful effects of MWCNT exposure on human lungs. > The results could potentially be used for the medical surveillance of workers.

  9. Congressional Black Caucus Foundation, Inc. Meet/Match Procurement...

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

    Congressional Black Caucus Foundation, Inc. MeetMatch Procurement Forum Congressional Black Caucus Foundation, Inc. MeetMatch Procurement Forum Presented by Congresswoman Sheila...

  10. White House Initiative on Historically Black Colleges and Universities...

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

    White House Initiative on Historically Black Colleges and Universities White House Initiative on Historically Black Colleges and Universities How WHI-HBCU are ran White House...

  11. Austin E. Quigley Black Box Theater Proposal Form

    E-Print Network [OSTI]

    Hone, James

    -1- Austin E. Quigley Black Box Theater Proposal Form Sponsoring Organization indicate that you have read the Austin E. Quigley Black Box Theatre Policy and Procedure Guidelines

  12. Energy conservation for dynamical black holes

    E-Print Network [OSTI]

    Sean A. Hayward

    2004-08-03T23:59:59.000Z

    An energy conservation law is described, expressing the increase in mass-energy of a general black hole in terms of the energy densities of the infalling matter and gravitational radiation. For a growing black hole, this first law of black-hole dynamics is equivalent to an equation of Ashtekar & Krishnan, but the new integral and differential forms are regular in the limit where the black hole ceases to grow. An effective gravitational-radiation energy tensor is obtained, providing measures of both ingoing and outgoing, transverse and longitudinal gravitational radiation on and near a black hole. Corresponding energy-tensor forms of the first law involve a preferred time vector which plays the role for dynamical black holes which the stationary Killing vector plays for stationary black holes. Identifying an energy flux, vanishing if and only if the horizon is null, allows a division into energy-supply and work terms, as in the first law of thermodynamics. The energy supply can be expressed in terms of area increase and a newly defined surface gravity, yielding a Gibbs-like equation, with a similar form to the so-called first law for stationary black holes.

  13. Quantum Entropy of Charged Rotating Black Holes

    E-Print Network [OSTI]

    R. B. Mann

    1996-07-10T23:59:59.000Z

    I discuss a method for obtaining the one-loop quantum corrections to the tree-level entropy for a charged Kerr black hole. Divergences which appear can be removed by renormalization of couplings in the tree-level gravitational action in a manner similar to that for a static black hole.

  14. Black holes cannot support conformal scalar hair

    E-Print Network [OSTI]

    T. Zannias

    1994-09-14T23:59:59.000Z

    It is shown that the only static asymptotically flat non-extrema black hole solution of the Einstein-conformally invariant scalar field equations having the scalar field bounded on the horizon, is the Schwarzschild one. Thus black holes cannot be endowed with conformal scalar hair of finite length.

  15. The Kansas Black Bass Tournament Monitoring Program

    E-Print Network [OSTI]

    The Kansas Black Bass (Micropterus spp.) Tournament Monitoring Program was begun by the Kansas Fish and Game program of the Kansas Fish and Game Commission avoids both of these prob- lems. The Kansas Black Bass annually to each of the bass clubs in Kansas before the bulk of fishing begins, and clubs are asked

  16. Topological Black Holes in Quantum Gravity

    E-Print Network [OSTI]

    J. Kowalski-Glikman; D. Nowak-Szczepaniak

    2000-07-31T23:59:59.000Z

    We derive the black hole solutions with horizons of non-trivial topology and investigate their properties in the framework of an approach to quantum gravity being an extension of Bohm's formulation of quantum mechanics. The solutions we found tend asymptotically (for large $r$) to topological black holes. We also analyze the thermodynamics of these space-times.

  17. Cooking with Black-Eyed Peas

    E-Print Network [OSTI]

    Anding, Jenna

    2008-12-09T23:59:59.000Z

    the most protein from the peas, serve them with grain foods such as corn, rice or wheat. A serving size is ? cup. Uses Use black-eyed peas as a tasty side dish or include it in casseroles, soups, and salads. Black-eyed peas are often packaged in 1- or 2...

  18. Distortion of Schwarzschild-anti-de Sitter black holes to black strings

    E-Print Network [OSTI]

    A. Tomimatsu

    2005-06-25T23:59:59.000Z

    Motivated by the existence of black holes with various topologies in four-dimensional spacetimes with a negative cosmological constant, we study axisymmetric static solutions describing any large distortions of Schwarzschild-anti-de Sitter black holes parametrized by the mass $m$. Under the approximation such that $m$ is much larger than the anti-de Sitter radius, it is found that a cylindrically symmetric black string is obtained as a special limit of distorted spherical black holes. Such a prolonged distortion of the event horizon connecting a Schwarzschild-anti-de Sitter black hole to a black string is allowed without violating both the usual black hole thermodynamics and the hoop conjecture for the horizon circumference.

  19. Physiological Interaction of Heart and Lung in Thoracic Irradiation

    SciTech Connect (OSTI)

    Ghobadi, Ghazaleh; Veen, Sonja van der [Department of Radiation Oncology, University of Groningen, University Medical Center Groningen, Groningen (Netherlands) [Department of Radiation Oncology, University of Groningen, University Medical Center Groningen, Groningen (Netherlands); Department of Cell Biology, University of Groningen, University Medical Center Groningen, Groningen (Netherlands); Bartelds, Beatrijs [Center for Congenital Heart Disease, Beatrix Children Hospital, University of Groningen, University Medical Center Groningen, Groningen (Netherlands)] [Center for Congenital Heart Disease, Beatrix Children Hospital, University of Groningen, University Medical Center Groningen, Groningen (Netherlands); Boer, Rudolf A. de [Department of Cardiology, University of Groningen, University Medical Center Groningen, Groningen (Netherlands)] [Department of Cardiology, University of Groningen, University Medical Center Groningen, Groningen (Netherlands); Dickinson, Michael G. [Center for Congenital Heart Disease, Beatrix Children Hospital, University of Groningen, University Medical Center Groningen, Groningen (Netherlands)] [Center for Congenital Heart Disease, Beatrix Children Hospital, University of Groningen, University Medical Center Groningen, Groningen (Netherlands); Jong, Johan R. de [Department of Nuclear Medicine and Molecular Imaging, University of Groningen, University Medical Center Groningen, Groningen (Netherlands)] [Department of Nuclear Medicine and Molecular Imaging, University of Groningen, University Medical Center Groningen, Groningen (Netherlands); Faber, Hette; Niemantsverdriet, Maarten [Department of Radiation Oncology, University of Groningen, University Medical Center Groningen, Groningen (Netherlands) [Department of Radiation Oncology, University of Groningen, University Medical Center Groningen, Groningen (Netherlands); Department of Cell Biology, University of Groningen, University Medical Center Groningen, Groningen (Netherlands); Brandenburg, Sytze [Kernfysisch Versneller Instituut, University of Groningen, Groningen (Netherlands)] [Kernfysisch Versneller Instituut, University of Groningen, Groningen (Netherlands); Berger, Rolf M.F. [Center for Congenital Heart Disease, Beatrix Children Hospital, University of Groningen, University Medical Center Groningen, Groningen (Netherlands)] [Center for Congenital Heart Disease, Beatrix Children Hospital, University of Groningen, University Medical Center Groningen, Groningen (Netherlands); Langendijk, Johannes A. [Department of Radiation Oncology, University of Groningen, University Medical Center Groningen, Groningen (Netherlands)] [Department of Radiation Oncology, University of Groningen, University Medical Center Groningen, Groningen (Netherlands); Coppes, Robert P. [Department of Radiation Oncology, University of Groningen, University Medical Center Groningen, Groningen (Netherlands) [Department of Radiation Oncology, University of Groningen, University Medical Center Groningen, Groningen (Netherlands); Department of Cell Biology, University of Groningen, University Medical Center Groningen, Groningen (Netherlands); Luijk, Peter van, E-mail: p.van.luijk@umcg.nl [Department of Radiation Oncology, University of Groningen, University Medical Center Groningen, Groningen (Netherlands)

    2012-12-01T23:59:59.000Z

    Introduction: The risk of early radiation-induced lung toxicity (RILT) limits the dose and efficacy of radiation therapy of thoracic tumors. In addition to lung dose, coirradiation of the heart is a known risk factor in the development RILT. The aim of this study was to identify the underlying physiology of the interaction between lung and heart in thoracic irradiation. Methods and Materials: Rat hearts, lungs, or both were irradiated to 20 Gy using high-precision proton beams. Cardiopulmonary performance was assessed using breathing rate measurements and F{sup 18}-fluorodeoxyglucose positron emission tomography ({sup 18}F-FDG-PET) scans biweekly and left- and right-sided cardiac hemodynamic measurements and histopathology analysis at 8 weeks postirradiation. Results: Two to 12 weeks after heart irradiation, a pronounced defect in the uptake of {sup 18}F-FDG in the left ventricle (LV) was observed. At 8 weeks postirradiation, this coincided with LV perivascular fibrosis, an increase in LV end-diastolic pressure, and pulmonary edema in the shielded lungs. Lung irradiation alone not only increased pulmonary artery pressure and perivascular edema but also induced an increased LV relaxation time. Combined irradiation of lung and heart induced pronounced increases in LV end-diastolic pressure and relaxation time, in addition to an increase in right ventricle end-diastolic pressure, indicative of biventricular diastolic dysfunction. Moreover, enhanced pulmonary edema, inflammation and fibrosis were also observed. Conclusions: Both lung and heart irradiation cause cardiac and pulmonary toxicity via different mechanisms. Thus, when combined, the loss of cardiopulmonary performance is intensified further, explaining the deleterious effects of heart and lung coirradiation. Our findings show for the first time the physiological mechanism underlying the development of a multiorgan complication, RILT. Reduction of dose to either of these organs offers new opportunities to improve radiation therapy treatment of thoracic tumors, potentially facilitating increased treatment doses and tumor control.

  20. Single-Session Radiofrequency Ablation of Bilateral Lung Metastases

    SciTech Connect (OSTI)

    Palussiere, Jean, E-mail: palussiere@bergonie.org; Gomez, Fernando; Cannella, Matthieu; Ferron, Stephane; Descat, Edouard [Institut Bergonie, Department of Radiology, Regional Cancer Centre (France); Fonck, Marianne [Institut Bergonie, Department of Digestive Oncology (France); Brouste, Veronique [Institut Bergonie, Clinical and Epidemiological Research Unit (France); Avril, Antoine [Institut Bergonie, Department of Surgery (France)

    2012-08-15T23:59:59.000Z

    Purpose: This retrospective study examined the feasibility and efficacy of bilateral lung radiofrequency ablation (RFA) performed in a single session. Methods: From 2002-2009, patients with bilateral lung metastases were treated by RFA, where possible in a single session under general anesthesia with CT guidance. The second lung was punctured only if no complications occurred after treatment of the first lung. Five lung metastases maximum per patient were treated by RFA and prospectively followed. The primary endpoint was the evaluation of acute and delayed complications. Secondary endpoints were calculation of hospitalization duration, local efficacy, median survival, and median time to tumor progression. Local efficacy was evaluated on CT or positron emission tomography (PET) CT. Results: Sixty-seven patients were treated for bilateral lung metastases with RFA (mean age, 62 years). Single-session treatment was not possible in 40 due to severe pneumothoraces (n = 24), bilateral pleural contact (n = 14), and operational exclusions (n = 2). Twenty-seven (41%) received single-session RFA of lesions in both lungs for 66 metastases overall. Fourteen unilateral and four bilateral pneumothoraces occurred (18 overall, 66.7%). Unilateral (n = 13) and bilateral (n = 2) chest tube drainage was required. Median hospitalization was 3 (range, 2-8) days. Median survival was 26 months (95% confidence interval (CI), 19-33). Four recurrences on RFA sites were observed (4 patients). Median time to tumor progression was 9.5 months (95% CI, 4.2-23.5). Conclusions: Although performing single-session bilateral lung RFA is not always possible due to pneumothoraces after RFA of first lung, when it is performed, this technique is safe and effective.

  1. REFRACTORY FOR BLACK LIQUOR GASIFIERS

    SciTech Connect (OSTI)

    William L. Headrick Jr; Musa Karakus; Xiaoting Liang; Alireza Rezaie

    2004-10-01T23:59:59.000Z

    The University of Missouri-Rolla will identify materials that will permit the safe, reliable and economical operation of combined cycle gasifiers by the pulp and paper industry. The primary emphasis of this project will be to resolve the material problems encountered during the operation of low-pressure high-temperature (LPHT) and low-pressure low-temperature (LPLT) gasifiers while simultaneously understanding the materials barriers to the successful demonstration of high-pressure high-temperature (HPHT) black liquor gasifiers. This study will define the chemical, thermal and physical conditions in current and proposed gasifier designs and then modify existing materials and develop new materials to successfully meet the formidable material challenges. Resolving the material challenges of black liquor gasification combined cycle technology will provide energy, environmental, and economic benefits that include higher thermal efficiencies, up to three times greater electrical output per unit of fuel, and lower emissions. In the near term, adoption of this technology will allow the pulp and paper industry greater capital effectiveness and flexibility, as gasifiers are added to increase mill capacity. In the long term, combined-cycle gasification will lessen the industry's environmental impact while increasing its potential for energy production, allowing the production of all the mill's heat and power needs along with surplus electricity being returned to the grid. An added benefit will be the potential elimination of the possibility of smelt-water explosions, which constitute an important safety concern wherever conventional Tomlinson recovery boilers are operated. Developing cost-effective materials with improved performance in gasifier environments may be the best answer to the material challenges presented by black liquor gasification. Refractory materials may be selected/developed that either react with the gasifier environment to form protective surfaces in-situ; are functionally-graded to give the best combination of thermal, mechanical, and physical properties and chemical stability; or are relatively inexpensive, reliable repair materials. Material development will be divided into 2 tasks: Task 1, Development and property determinations of improved and existing refractory systems for black liquor containment. Refractory systems of interest include magnesium aluminate and barium aluminate for binder materials, both dry and hydratable, and materials with high alumina contents, 85-95 wt%, aluminum oxide, 5.0-15.0 wt%, and BaO, SrO, CaO, ZrO{sub 2} and SiC. Task 2, Finite element analysis of heat flow and thermal stress/strain in the refractory lining and steel shell of existing and proposed vessel designs. Stress and strain due to thermal and chemical expansion has been observed to be detrimental to the lifespan of existing black liquor gasifiers. The thermal and chemical strain as well as corrosion rates must be accounted for in order to predict the lifetime of the gasifier containment materials.

  2. Refractory for Black Liquor Gasifiers

    SciTech Connect (OSTI)

    William L. Headrick; Musa Karakus; Alireza Rezaie

    2004-03-30T23:59:59.000Z

    The University of Missouri-Rolla will identify materials that will permit the safe, reliable and economical operation of combined cycle gasifiers by the pulp and paper industry. The primary emphasis of this project will be to resolve the material problems encountered during the operation of low-pressure high-temperature (LPHT) and low-pressure low-temperature (LPLT) gasifiers while simultaneously understanding the materials barriers to the successful demonstration of high-pressure high-temperature (HPHT) black liquor gasifiers. This study will define the chemical, thermal and physical conditions in current and proposed gasifier designs and then modify existing materials and develop new materials to successfully meet the formidable material challenges. Resolving the material challenges of black liquor gasification combined cycle technology will provide energy, environmental, and economic benefits that include higher thermal efficiencies, up to three times greater electrical output per unit of fuel, and lower emissions. In the near term, adoption of this technology will allow the pulp and paper industry greater capital effectiveness and flexibility, as gasifiers are added to increase mill capacity. In the long term, combined-cycle gasification will lessen the industry's environmental impact while increasing its potential for energy production, allowing the production of all the mill's heat and power needs along with surplus electricity being returned to the grid. An added benefit will be the potential elimination of the possibility of smelt-water explosions, which constitute an important safety concern wherever conventional Tomlinson recovery boilers are operated. Developing cost-effective materials with improved performance in gasifier environments may be the best answer to the material challenges presented by black liquor gasification. Refractory materials may be selected/developed that either react with the gasifier environment to form protective surfaces in-situ; are functionally-graded to give the best combination of thermal, mechanical, and physical properties and chemical stability; or are relatively inexpensive, reliable repair materials. Material development will be divided into 2 tasks: Task 1, Development and property determinations of improved and existing refractory systems for black liquor containment. Refractory systems of interest include magnesium aluminate and barium aluminate for binder materials, both dry and hydratable, and materials with high alumina contents, 85-95 wt%, aluminum oxide, 5.0-15.0 wt%, and BaO, SrO, CaO, ZrO2 and SiC. Task 2, Finite element analysis of heat flow and thermal stress/strain in the refractory lining and steel shell of existing and proposed vessel designs. Stress and strain due to thermal and chemical expansion has been observed to be detrimental to the lifespan of existing black liquor gasifiers. The thermal and chemical strain as well as corrosion rates must be accounted for in order to predict the lifetime of the gasifier containment materials.

  3. REFRACTORY FOR BLACK LIQUOR GASIFIERS

    SciTech Connect (OSTI)

    William L. Headrick Jr; Musa Karakus; Xiaoting Liang; Alireza Rezaie

    2004-07-01T23:59:59.000Z

    The University of Missouri-Rolla will identify materials that will permit the safe, reliable and economical operation of combined cycle gasifiers by the pulp and paper industry. The primary emphasis of this project will be to resolve the material problems encountered during the operation of low-pressure high-temperature (LPHT) and low-pressure low-temperature (LPLT) gasifiers while simultaneously understanding the materials barriers to the successful demonstration of high-pressure high-temperature (HPHT) black liquor gasifiers. This study will define the chemical, thermal and physical conditions in current and proposed gasifier designs and then modify existing materials and develop new materials to successfully meet the formidable material challenges. Resolving the material challenges of black liquor gasification combined cycle technology will provide energy, environmental, and economic benefits that include higher thermal efficiencies, up to three times greater electrical output per unit of fuel, and lower emissions. In the near term, adoption of this technology will allow the pulp and paper industry greater capital effectiveness and flexibility, as gasifiers are added to increase mill capacity. In the long term, combined-cycle gasification will lessen the industry's environmental impact while increasing its potential for energy production, allowing the production of all the mill's heat and power needs along with surplus electricity being returned to the grid. An added benefit will be the potential elimination of the possibility of smelt-water explosions, which constitute an important safety concern wherever conventional Tomlinson recovery boilers are operated. Developing cost-effective materials with improved performance in gasifier environments may be the best answer to the material challenges presented by black liquor gasification. Refractory materials may be selected/developed that either react with the gasifier environment to form protective surfaces in-situ; are functionally-graded to give the best combination of thermal, mechanical, and physical properties and chemical stability; or are relatively inexpensive, reliable repair materials. Material development will be divided into 2 tasks: Task 1, Development and property determinations of improved and existing refractory systems for black liquor containment. Refractory systems of interest include magnesium aluminate and barium aluminate for binder materials, both dry and hydratable, and materials with high alumina contents, 85-95 wt%, aluminum oxide, 5.0-15.0 wt%, and BaO, SrO, CaO, ZrO{sub 2} and SiC. Task 2, Finite element analysis of heat flow and thermal stress/strain in the refractory lining and steel shell of existing and proposed vessel designs. Stress and strain due to thermal and chemical expansion has been observed to be detrimental to the lifespan of existing black liquor gasifiers. The thermal and chemical strain as well as corrosion rates must be accounted for in order to predict the lifetime of the gasifier containment materials.

  4. Refractory for Black Liquor Gasifiers

    SciTech Connect (OSTI)

    William L. Headrick Jr; Musa Karakus; Xiaoting Liang

    2005-10-01T23:59:59.000Z

    The University of Missouri-Rolla identified materials that permit the safe, reliable and economical operation of combined cycle gasifiers by the pulp and paper industry. The primary emphasis of this project was to resolve the material problems encountered during the operation of low-pressure high-temperature (LPHT) and low-pressure low-temperature (LPLT) gasifiers while simultaneously understanding the materials barriers to the successful demonstration of high-pressure high-temperature (HPHT) black liquor gasifiers. This study attempted to define the chemical, thermal and physical conditions in current and proposed gasifier designs and then modify existing materials and develop new materials to successfully meet the formidable material challenges. Resolving the material challenges of black liquor gasification combined cycle technology will provide energy, environmental, and economic benefits that include higher thermal efficiencies, up to three times greater electrical output per unit of fuel, and lower emissions. In the near term, adoption of this technology will allow the pulp and paper industry greater capital effectiveness and flexibility, as gasifiers are added to increase mill capacity. In the long term, combined-cycle gasification will lessen the industry's environmental impact while increasing its potential for energy production, allowing the production of all the mill's heat and power needs along with surplus electricity being returned to the grid. An added benefit will be the potential elimination of the possibility of smelt-water explosions, which constitute an important safety concern wherever conventional Tomlinson recovery boilers are operated. Developing cost-effective materials with improved performance in gasifier environments may be the best answer to the material challenges presented by black liquor gasification. Refractory materials were selected/developed that either react with the gasifier environment to form protective surfaces in-situ; and were functionally-graded to give the best combination of thermal, mechanical, and physical properties and chemical stability; or are relatively inexpensive, reliable repair materials. Material development were divided into 2 tasks: Task 1, Development and property determinations of improved and existing refractory systems for black liquor containment. Refractory systems of interest include magnesium aluminate and barium aluminate for binder materials, both dry and hydratable, and materials with high alumina contents, 85-95 wt%, aluminum oxide, 5.0-15.0 wt%, and BaO, SrO, CaO, ZrO{sub 2} and SiC. Task 2, Finite element analysis of heat flow and thermal stress/strain in the refractory lining and steel shell of existing and proposed vessel designs. Stress and strain due to thermal and chemical expansion has been observed to be detrimental to the lifespan of existing black liquor gasifiers. The thermal and chemical strain as well as corrosion rates must be accounted for in order to predict the lifetime of the gasifier containment materials.

  5. REFRACTORY FOR BLACK LIQUOR GASIFIERS

    SciTech Connect (OSTI)

    William L. Headrick Jr.; Alireza Rezaie

    2004-04-01T23:59:59.000Z

    The University of Missouri-Rolla will identify materials that will permit the safe, reliable and economical operation of combined cycle gasifiers by the pulp and paper industry. The primary emphasis of this project will be to resolve the materials problems encountered during the operation of low-pressure high-temperature (LPHT) and low-pressure low-temperature (LPLT) gasifiers while simultaneously understanding the materials barriers to the successful demonstration of high-pressure high-temperature (HPHT) black liquor gasifiers. This study will define the chemical, thermal and physical conditions in current and proposed gasifier designs and then modify existing materials and develop new materials to successfully meet the formidable material challenges. Resolving the material challenges of black liquor gasification combined cycle technology will provide energy, environmental, and economic benefits that include higher thermal efficiencies, up to three times greater electrical output per unit of fuel, and lower emissions. In the near term, adoption of this technology will allow the pulp and paper industry greater capital effectiveness and flexibility, as gasifiers are added to increase mill capacity. In the long term, combined-cycle gasification will lessen the industry's environmental impact while increasing its potential for energy production, allowing the production of all the mill's heat and power needs along with surplus electricity being returned to the grid. An added benefit will be the potential elimination of the possibility of smelt-water explosions, which constitute an important safety concern wherever conventional Tomlinson recovery boilers are operated. Developing cost-effective materials with improved performance in gasifier environments may be the best answer to the material challenges presented by black liquor gasification. Refractory materials may be selected/developed that either react with the gasifier environment to form protective surfaces in-situ; are functionally-graded to give the best combination of thermal, mechanical, and physical properties and chemical stability; or are relatively inexpensive, reliable repair materials. Material development will be divided into 2 tasks: Task 1, Development and property determinations of improved and existing refractory systems for black liquor containment. Refractory systems of interest include magnesium aluminate and barium aluminate spinels for binder materials, both dry and hydratable, and materials with high alumina contents, 85-95 wt%, aluminum oxide, 5.0-15.0 wt%, and BaO, SrO, CaO, ZrO{sub 2} and SiC. Task 2, Finite element analysis of heat flow and thermal stress/strain in the refractory lining and steel shell of existing and proposed vessel designs. Stress and strain due to thermal and chemical expansion has been observed to be detrimental to the lifespan of existing black liquor gasifiers. The thermal and chemical strain as well as corrosion rates must be accounted for in order to predict the lifetime of the gasifier containment materials.

  6. REFRACTORY FOR BLACK LIQUOR GASIFIERS

    SciTech Connect (OSTI)

    William L. Headrick Jr; Musa Karakus; Xiaoting Liang; Jun Wei

    2005-04-01T23:59:59.000Z

    The University of Missouri-Rolla will identify materials that will permit the safe, reliable and economical operation of combined cycle gasifiers by the pulp and paper industry. The primary emphasis of this project will be to resolve the material problems encountered during the operation of low-pressure high-temperature (LPHT) and low-pressure low-temperature (LPLT) gasifiers while simultaneously understanding the materials barriers to the successful demonstration of high-pressure high-temperature (HPHT) black liquor gasifiers. This study will define the chemical, thermal and physical conditions in current and proposed gasifier designs and then modify existing materials and develop new materials to successfully meet the formidable material challenges. Resolving the material challenges of black liquor gasification combined cycle technology will provide energy, environmental, and economic benefits that include higher thermal efficiencies, up to three times greater electrical output per unit of fuel, and lower emissions. In the near term, adoption of this technology will allow the pulp and paper industry greater capital effectiveness and flexibility, as gasifiers are added to increase mill capacity. In the long term, combined-cycle gasification will lessen the industry's environmental impact while increasing its potential for energy production, allowing the production of all the mill's heat and power needs along with surplus electricity being returned to the grid. An added benefit will be the potential elimination of the possibility of smelt-water explosions, which constitute an important safety concern wherever conventional Tomlinson recovery boilers are operated. Developing cost-effective materials with improved performance in gasifier environments may be the best answer to the material challenges presented by black liquor gasification. Refractory materials may be selected/developed that either react with the gasifier environment to form protective surfaces in-situ; are functionally-graded to give the best combination of thermal, mechanical, and physical properties and chemical stability; or are relatively inexpensive, reliable repair materials. Material development will be divided into 2 tasks: Task 1, Development and property determinations of improved and existing refractory systems for black liquor containment. Refractory systems of interest include magnesium aluminate and barium aluminate for binder materials, both dry and hydratable, and materials with high alumina contents, 85-95 wt%, aluminum oxide, 5.0-15.0 wt%, and BaO, SrO, CaO, ZrO{sub 2} and SiC. Task 2, Finite element analysis of heat flow and thermal stress/strain in the refractory lining and steel shell of existing and proposed vessel designs. Stress and strain due to thermal and chemical expansion has been observed to be detrimental to the lifespan of existing black liquor gasifiers. The thermal and chemical strain as well as corrosion rates must be accounted for in order to predict the lifetime of the gasifier containment materials.

  7. REFRACTORY FOR BLACK LIQUOR GASIFIERS

    SciTech Connect (OSTI)

    William L. Headrick Jr; Musa Karakus; Xiaoting Liang

    2005-07-01T23:59:59.000Z

    The University of Missouri-Rolla will identify materials that will permit the safe, reliable and economical operation of combined cycle gasifiers by the pulp and paper industry. The primary emphasis of this project will be to resolve the material problems encountered during the operation of low-pressure high-temperature (LPHT) and low-pressure low-temperature (LPLT) gasifiers while simultaneously understanding the materials barriers to the successful demonstration of high-pressure high-temperature (HPHT) black liquor gasifiers. This study will define the chemical, thermal and physical conditions in current and proposed gasifier designs and then modify existing materials and develop new materials to successfully meet the formidable material challenges. Resolving the material challenges of black liquor gasification combined cycle technology will provide energy, environmental, and economic benefits that include higher thermal efficiencies, up to three times greater electrical output per unit of fuel, and lower emissions. In the near term, adoption of this technology will allow the pulp and paper industry greater capital effectiveness and flexibility, as gasifiers are added to increase mill capacity. In the long term, combined-cycle gasification will lessen the industry's environmental impact while increasing its potential for energy production, allowing the production of all the mill's heat and power needs along with surplus electricity being returned to the grid. An added benefit will be the potential elimination of the possibility of smelt-water explosions, which constitute an important safety concern wherever conventional Tomlinson recovery boilers are operated. Developing cost-effective materials with improved performance in gasifier environments may be the best answer to the material challenges presented by black liquor gasification. Refractory materials may be selected/developed that either react with the gasifier environment to form protective surfaces in-situ; are functionally-graded to give the best combination of thermal, mechanical, and physical properties and chemical stability; or are relatively inexpensive, reliable repair materials. Material development will be divided into 2 tasks: Task 1, Development and property determinations of improved and existing refractory systems for black liquor containment. Refractory systems of interest include magnesium aluminate and barium aluminate for binder materials, both dry and hydratable, and materials with high alumina contents, 85-95 wt%, aluminum oxide, 5.0-15.0 wt%, and BaO, SrO, CaO, ZrO{sub 2} and SiC. Task 2, Finite element analysis of heat flow and thermal stress/strain in the refractory lining and steel shell of existing and proposed vessel designs. Stress and strain due to thermal and chemical expansion has been observed to be detrimental to the lifespan of existing black liquor gasifiers. The thermal and chemical strain as well as corrosion rates must be accounted for in order to predict the lifetime of the gasifier containment materials.

  8. REFRACTORY FOR BLACK LIQUOR GASIFIERS

    SciTech Connect (OSTI)

    William L. Headrick Jr; Musa Karakus; Xiaoting Liang; Jun Wei

    2005-01-01T23:59:59.000Z

    The University of Missouri-Rolla will identify materials that will permit the safe, reliable and economical operation of combined cycle gasifiers by the pulp and paper industry. The primary emphasis of this project will be to resolve the material problems encountered during the operation of low-pressure high-temperature (LPHT) and low-pressure low-temperature (LPLT) gasifiers while simultaneously understanding the materials barriers to the successful demonstration of high-pressure high-temperature (HPHT) black liquor gasifiers. This study will define the chemical, thermal and physical conditions in current and proposed gasifier designs and then modify existing materials and develop new materials to successfully meet the formidable material challenges. Resolving the material challenges of black liquor gasification combined cycle technology will provide energy, environmental, and economic benefits that include higher thermal efficiencies, up to three times greater electrical output per unit of fuel, and lower emissions. In the near term, adoption of this technology will allow the pulp and paper industry greater capital effectiveness and flexibility, as gasifiers are added to increase mill capacity. In the long term, combined-cycle gasification will lessen the industry's environmental impact while increasing its potential for energy production, allowing the production of all the mill's heat and power needs along with surplus electricity being returned to the grid. An added benefit will be the potential elimination of the possibility of smelt-water explosions, which constitute an important safety concern wherever conventional Tomlinson recovery boilers are operated. Developing cost-effective materials with improved performance in gasifier environments may be the best answer to the material challenges presented by black liquor gasification. Refractory materials may be selected/developed that either react with the gasifier environment to form protective surfaces in-situ; are functionally-graded to give the best combination of thermal, mechanical, and physical properties and chemical stability; or are relatively inexpensive, reliable repair materials. Material development will be divided into 2 tasks: Task 1, Development and property determinations of improved and existing refractory systems for black liquor containment. Refractory systems of interest include magnesium aluminate and barium aluminate for binder materials, both dry and hydratable, and materials with high alumina contents, 85-95 wt%, aluminum oxide, 5.0-15.0 wt%, and BaO, SrO, CaO, ZrO{sub 2} and SiC. Task 2, Finite element analysis of heat flow and thermal stress/strain in the refractory lining and steel shell of existing and proposed vessel designs. Stress and strain due to thermal and chemical expansion has been observed to be detrimental to the lifespan of existing black liquor gasifiers. The thermal and chemical strain as well as corrosion rates must be accounted for in order to predict the lifetime of the gasifier containment materials.

  9. Refractory for Black Liquor Gasifiers

    SciTech Connect (OSTI)

    William L. Headrick Jr; Alireza Rezaie

    2003-12-01T23:59:59.000Z

    The University of Missouri-Rolla will identify materials that will permit the safe, reliable and economical operation of combined cycle gasifiers by the pulp and paper industry. The primary emphasis of this project will be to resolve the materials problems encountered during the operation of low-pressure high-temperature (LFHT) and low-pressure low-temperature (LPLT) gasifiers while simultaneously understanding the materials barriers to the successful demonstration of high-pressure high-temperature (HPHT) black liquor gasifiers. This study will define the chemical, thermal and physical conditions in current and proposed gasifier designs and then modify existing materials and develop new materials to successfully meet the formidable material challenges. Resolving the material challenges of black liquor gasification combined cycle technology will provide energy, environmental, and economic benefits that include higher thermal efficiencies, up to three times greater electrical output per unit of fuel, and lower emissions. In the near term, adoption of this technology will allow the pulp and paper industry greater capital effectiveness and flexibility, as gasifiers are added to increase mill capacity. In the long term, combined-cycle gasification will lessen the industry's environmental impact while increasing its potential for energy production, allowing the production of all the mill's heat and power needs along with surplus electricity being returned to the grid. An added benefit will be the potential elimination of the possibility of smelt-water explosions, which constitute an important safety concern wherever conventional Tomlinson recovery boilers are operated. Developing cost-effective materials with improved performance in gasifier environments may be the best answer to the material challenges presented by black liquor gasification. Refractory materials may be selected/developed that either react with the gasifier environment to form protective surfaces in-situ; are functionally-graded to give the best combination of thermal, mechanical, and physical properties and chemical stability; or are relatively inexpensive, reliable repair materials. Material development will be divided into 2 tasks: Task 1, Development and property determinations of improved and existing refractory systems for black liquor containment. Refractory systems of interest include magnesia aluminate and baria aluminate spinels for binder materials, both dry and hydratable, and materials with high alumina contents, 85-95 wt%, aluminum oxide, 5.0-15.0 wt%, and BaO, SrO, CaO, ZrO and SiC. Task 2, Finite element analysis of heat flow and thermal stress/strain in the refractory lining and steel shell of existing and proposed vessel designs. Stress and strain due to thermal and chemical expansion has been observed to be detrimental to the lifespan of existing black liquor gasifiers. The thermal and chemical strain as well as corrosion rates must be accounted for in order to predict the lifetime of the gasifier containment materials.

  10. Refractory for Black Liquor Gasifiers

    SciTech Connect (OSTI)

    William L. Headrick Jr; Alireza Rezaie; Xiaoting Liang; Musa Karakus; Jun Wei

    2005-12-01T23:59:59.000Z

    The University of Missouri-Rolla identified materials that permit the safe, reliable and economical operation of combined cycle gasifiers by the pulp and paper industry. The primary emphasis of this project was to resolve the material problems encountered during the operation of low-pressure high-temperature (LPHT) and low-pressure low-temperature (LPLT) gasifiers while simultaneously understanding the materials barriers to the successful demonstration of high-pressure high-temperature (HPHT) black liquor gasifiers. This study attempted to define the chemical, thermal and physical conditions in current and proposed gasifier designs and then modify existing materials and develop new materials to successfully meet the formidable material challenges. Resolving the material challenges of black liquor gasification combined cycle technology will provide energy, environmental, and economic benefits that include higher thermal efficiencies, up to three times greater electrical output per unit of fuel, and lower emissions. In the near term, adoption of this technology will allow the pulp and paper industry greater capital effectiveness and flexibility, as gasifiers are added to increase mill capacity. In the long term, combined-cycle gasification will lessen the industry's environmental impact while increasing its potential for energy production, allowing the production of all the mill's heat and power needs along with surplus electricity being returned to the grid. An added benefit will be the potential elimination of the possibility of smelt-water explosions, which constitute an important safety concern wherever conventional Tomlinson recovery boilers are operated. Developing cost-effective materials with improved performance in gasifier environments may be the best answer to the material challenges presented by black liquor gasification. Refractory materials were selected or developed that reacted with the gasifier environment to form protective surfaces in-situ; and were functionally-graded to give the best combination of thermal, mechanical and physical properties and chemical stability; and are relatively inexpensive, reliable repair materials. Material development was divided into 2 tasks: Task 1 was development and property determinations of improved and existing refractory systems for black liquor containment. Refractory systems of interest include magnesium aluminate and barium aluminate for binder materials, both dry and hydratable, and materials with high alumina contents, 85-95 wt%, aluminum oxide, 5.0-15.0 wt%, and BaO, SrO, CaO, ZrO2 and SiC. Task 2 was finite element analysis of heat flow and thermal stress/strain in the refractory lining and steel shell of existing and proposed vessel designs. Stress and strain due to thermal and chemical expansion has been observed to be detrimental to the lifespan of existing black liquor gasifiers. The thermal and chemical strain as well as corrosion rates must be accounted for in order to predict the lifetime of the gasifier containment materials.

  11. REFRACTORY FOR BLACK LIQUOR GASIFIERS

    SciTech Connect (OSTI)

    William L. Headrick Jr.; Alireza Rezaie

    2003-12-01T23:59:59.000Z

    The University of Missouri-Rolla will identify materials that will permit the safe, reliable and economical operation of combined cycle gasifiers by the pulp and paper industry. The primary emphasis of this project will be to resolve the materials problems encountered during the operation of low-pressure high-temperature (LFHT) and low-pressure low-temperature (LPLT) gasifiers while simultaneously understanding the materials barriers to the successful demonstration of high-pressure high-temperature (HPHT) black liquor gasifiers. This study will define the chemical, thermal and physical conditions in current and proposed gasifier designs and then modify existing materials and develop new materials to successfully meet the formidable material challenges. Resolving the material challenges of black liquor gasification combined cycle technology will provide energy, environmental, and economic benefits that include higher thermal efficiencies, up to three times greater electrical output per unit of fuel, and lower emissions. In the near term, adoption of this technology will allow the pulp and paper industry greater capital effectiveness and flexibility, as gasifiers are added to increase mill capacity. In the long term, combined-cycle gasification will lessen the industry's environmental impact while increasing its potential for energy production, allowing the production of all the mill's heat and power needs along with surplus electricity being returned to the grid. An added benefit will be the potential elimination of the possibility of smelt-water explosions, which constitute an important safety concern wherever conventional Tomlinson recovery boilers are operated. Developing cost-effective materials with improved performance in gasifier environments may be the best answer to the material challenges presented by black liquor gasification. Refractory materials may be selected/developed that either react with the gasifier environment to form protective surfaces in-situ; are functionally-graded to give the best combination of thermal, mechanical, and physical properties and chemical stability; or are relatively inexpensive, reliable repair materials. Material development will be divided into 2 tasks: Task 1, Development and property determinations of improved and existing refractory systems for black liquor containment. Refractory systems of interest include magnesia aluminate and baria aluminate spinels for binder materials, both dry and hydratable, and materials with high alumina contents, 85-95 wt%, aluminum oxide, 5.0-15.0 wt%, and BaO, SrO, CaO, ZrO and SiC. Task 2, Finite element analysis of heat flow and thermal stress/strain in the refractory lining and steel shell of existing and proposed vessel designs. Stress and strain due to thermal and chemical expansion has been observed to be detrimental to the lifespan of existing black liquor gasifiers. The thermal and chemical strain as well as corrosion rates must be accounted for in order to predict the lifetime of the gasifier containment materials.

  12. Refractory for Black Liquor Gasifiers

    SciTech Connect (OSTI)

    William L. Headrick Jr; Alireza Rezaie

    2003-08-01T23:59:59.000Z

    The University of Missouri-Rolla will identify materials that will permit the safe, reliable and economical operation of combined cycle gasifiers by the pulp and paper industry. The primary emphasis of this project will be to resolve the materials problems encountered during the operation of low-pressure high-temperature (LFHT) and low-pressure low-temperature (LPLT) gasifiers while simultaneously understanding the materials barriers to the successful demonstration of high-pressure high-temperature (HPHT) black liquor gasifiers. This study will define the chemical, thermal and physical conditions in current and proposed gasifier designs and then modify existing materials and develop new materials to successfully meet the formidable material challenges. Resolving the material challenges of black liquor gasification combined cycle technology will provide energy, environmental, and economic benefits that include higher thermal efficiencies, up to three times greater electrical output per unit of fuel, and lower emissions. In the near term, adoption of this technology will allow the pulp and paper industry greater capital effectiveness and flexibility, as gasifiers are added to increase mill capacity. In the long term, combined-cycle gasification will lessen the industry's environmental impact while increasing its potential for energy production, allowing the production of all the mill's heat and power needs along with surplus electricity being returned to the grid. An added benefit will be the potential elimination of the possibility of smelt-water explosions, which constitute an important safety concern wherever conventional Tomlinson recovery boilers are operated. Developing cost-effective materials with improved performance in gasifier environments may be the best answer to the material challenges presented by black liquor gasification. Refractory materials may be selected/developed that either react with the gasifier environment to form protective surfaces in-situ; are functionally-graded to give the best combination of thermal, mechanical, and physical properties and chemical stability; or are relatively inexpensive, reliable repair materials. Material development will be divided into 2 tasks: Task 1, Development and property determinations of improved and existing refractory systems for black liquor containment. Refractory systems of interest include magnesia aluminate and baria aluminate spinels for binder materials, both dry and hydratable, and materials with high alumina contents, 85-95 wt%, aluminum oxide, 5.0-15.0 wt%, and BaO, SrO, CaO, ZrO and SiC. Task 2, Finite element analysis of heat flow and thermal stress/strain in the refractory lining and steel shell of existing and proposed vessel designs. Stress and strain due to thermal and chemical expansion has been observed to be detrimental to the lifespan of existing black liquor gasifiers. The thermal and chemical strain as well as corrosion rates must be accounted for in order to predict the lifetime of the gasifier containment materials.

  13. Refractory for Black Liquor Gasifiers

    SciTech Connect (OSTI)

    Robert E. Moore; William L. Headrick; Alireza Rezaie

    2003-03-31T23:59:59.000Z

    The University of Missouri-Rolla will identify materials that will permit the safe, reliable and economical operation of combined cycle gasifiers by the pulp and paper industry. The primary emphasis of this project will be to resolve the materials problems encountered during the operation of low-pressure high-temperature (LFHT) and low-pressure low-temperature (LPLT) gasifiers while simultaneously understanding the materials barriers to the successful demonstration of high-pressure high-temperature (HPHT) black liquor gasifiers. This study will define the chemical, thermal and physical conditions in current and proposed gasifier designs and then modify existing materials and develop new materials to successfully meet the formidable material challenges. Resolving the material challenges of black liquor gasification combined cycle technology will provide energy, environmental, and economic benefits that include higher thermal efficiencies, up to three times greater electrical output per unit of fuel, and lower emissions. In the near term, adoption of this technology will allow the pulp and paper industry greater capital effectiveness and flexibility, as gasifiers are added to increase mill capacity. In the long term, combined-cycle gasification will lessen the industry's environmental impact while increasing its potential for energy production, allowing the production of all the mill's heat and power needs along with surplus electricity being returned to the grid. An added benefit will be the potential elimination of the possibility of smelt-water explosions, which constitute an important safety concern wherever conventional Tomlinson recovery boilers are operated. Developing cost-effective materials with improved performance in gasifier environments may be the best answer to the material challenges presented by black liquor gasification. Refractory materials may be selected/developed that either react with the gasifier environment to form protective surfaces in-situ; are functionally-graded to give the best combination of thermal, mechanical, and physical properties and chemical stability; or are relatively inexpensive, reliable repair materials. Material development will be divided into 2 tasks: Task 1, Development and property determinations of improved and existing refractory systems for black liquor containment. Refractory systems of interest include magnesia aluminate and baria aluminate spinels for binder materials, both dry and hydratable, and materials with high alumina contents, 85-95 wt%, aluminum oxide, 5.0-15.0 wt%, and BaO, SrO, CaO, ZrO and SiC. Task 2, Finite element analysis of heat flow and thermal stress/strain in the refractory lining and steel shell of existing and proposed vessel designs. Stress and strain due to thermal and chemical expansion has been observed to be detrimental to the lifespan of existing black liquor gasifiers. The thermal and chemical strain as well as corrosion rates must be accounted for in order to predict the lifetime of the gasifier containment materials.

  14. Black hole and holographic dark energy

    E-Print Network [OSTI]

    Yun Soo Myung

    2007-04-11T23:59:59.000Z

    We discuss the connection between black hole and holographic dark energy. We examine the issue of the equation of state (EOS) for holographic energy density as a candidate for the dark energy carefully. This is closely related to the EOS for black hole, because the holographic dark energy comes from the black hole energy density. In order to derive the EOS of a black hole, we may use its dual (quantum) systems. Finally, a regular black hole without the singularity is introduced to describe an accelerating universe inside the cosmological horizon. Inspired by this, we show that the holographic energy density with the cosmological horizon as the IR cutoff leads to the dark energy-dominated universe with $\\omega_{\\rm \\Lambda}=-1$.

  15. Black Hole Thermodynamics Based on Unitary Evolutions

    E-Print Network [OSTI]

    Feng, Yu-Lei

    2015-01-01T23:59:59.000Z

    In this paper, we try to construct black hole thermodynamics based on the fact that, the formation and evaporation of a black hole can be described by quantum unitary evolutions. First, we show that the Bekenstein-Hawking entropy $S_{BH}$ cannot be a Boltzmann or thermal entropy. To confirm this statement, we show that the original black hole's "first law" cannot be treated as the first law of thermodynamics formally, due to some missing metric perturbations caused by matter. Then, by including those (quantum) metric perturbations, we show that the black hole formation and evaporation can be described in a unitary manner effectively, through a quantum channel between the exterior and interior of the event horizon. In this way, the paradoxes of information loss and firewall can be resolved effectively. Finally, we show that black hole thermodynamics can be constructed in an ordinary way, by constructing statistical mechanics.

  16. An electromagnetic black hole made of metamaterials

    E-Print Network [OSTI]

    Cheng, Qiang

    2009-01-01T23:59:59.000Z

    Traditionally, a black hole is a region of space with huge gravitational field in the means of general relativity, which absorbs everything hitting it including the light. In general relativity, the presence of matter-energy densities results in the motion of matter propagating in a curved spacetime1, which is similar to the electromagnetic-wave propagation in a curved space and in an inhomogeneous metamaterial2. Hence one can simulate the black hole using electromagnetic fields and metamaterials. In a recent theoretical work, an optical black hole has been proposed based on metamaterials, in which the numerical simulations showed a highly efficient light absorption3. Here we report the first experimental demonstration of electromagnetic black hole in the microwave frequencies. The proposed black hole is composed of non-resonant and resonant metamaterial structures, which can absorb electromagnetic waves efficiently coming from all directions due to the local control of electromagnetic fields. Hence the elect...

  17. Black holes in Asymptotically Safe Gravity

    E-Print Network [OSTI]

    Saueressig, Frank; D'Odorico, Giulio; Vidotto, Francesca

    2015-01-01T23:59:59.000Z

    Black holes are among the most fascinating objects populating our universe. Their characteristic features, encompassing spacetime singularities, event horizons, and black hole thermodynamics, provide a rich testing ground for quantum gravity ideas. In this note we observe that the renormalization group improved Schwarzschild black holes constructed by Bonanno and Reuter within Weinberg's asymptotic safety program constitute a prototypical example of a Hayward geometry used to model non-singular black holes within quantum gravity phenomenology. Moreover, they share many features of a Planck star: their effective geometry naturally incorporates the one-loop corrections found in the effective field theory framework, their Kretschmann scalar is bounded, and the black hole singularity is replaced by a regular de Sitter patch. The role of the cosmological constant in the renormalization group improvement process is briefly discussed.

  18. Black Hole Superradiance in Dynamical Spacetime

    E-Print Network [OSTI]

    William E. East; Fethi M. Ramazano?lu; Frans Pretorius

    2014-03-14T23:59:59.000Z

    We study the superradiant scattering of gravitational waves by a nearly extremal black hole (dimensionless spin $a=0.99$) by numerically solving the full Einstein field equations, thus including backreaction effects. This allows us to study the dynamics of the black hole as it loses energy and angular momentum during the scattering process. To explore the nonlinear phase of the interaction, we consider gravitational wave packets with initial energies up to $10%$ of the mass of the black hole. We find that as the incident wave energy increases, the amplification of the scattered waves, as well as the energy extraction efficiency from the black hole, is reduced. During the interaction the apparent horizon geometry undergoes sizable nonaxisymmetric oscillations. The largest amplitude excitations occur when the peak frequency of the incident wave packet is above where superradiance occurs, but close to the dominant quasinormal mode frequency of the black hole.

  19. Effects of disabled vehicles stopped on a freeway shoulder

    E-Print Network [OSTI]

    Wilshire, Roy Leon

    1963-01-01T23:59:59.000Z

    EFFECTS OF !3ISABLED VEHICLES STOPPFD ON A FREEWAY SHOULDER A Thesis ROY LEON WILSHIRE S" bmitted to tl-, e Graduate School of the Agricultural and Mechar. ical Col lege of Texas in partial fulfillment of the t equiremcnts for the degree... of MASTER OF SCIENCE August 1963 Major Subject; Cevil Engineering EFFECTS OF DISABLED VEHICLES STOPPED ON A FREEWAY SHOULDER A Thesis By ROY LEON WILSHIRE Approved as to style and content by: Chairman of Committee H ad of Department August 196 3...

  20. Disabled Veterans Affirmative Action Plan | Department of Energy

    Office of Environmental Management (EM)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr May Jun Jul(Summary) "of EnergyEnergy CooperationRequirements Matrix U.S. DepartmentBaseload OperationDirect s-CO2Disabled

  1. Any health care reform must allow continuation of robust Medicaid Buy-In programs for working people with disabilities

    E-Print Network [OSTI]

    Otto, B.; Salley, S.; Hall, Jean P.; Himmelstein, J.

    2009-10-20T23:59:59.000Z

    National health care reform must meet the unique health care needs of people with disabilities. However, obtaining health care coverage for a person with disabilities can be challenging in an employer-based health insurance environment. The final...

  2. Validation of the Revised Children's Manifest Anxiety Scale, Second Edition (RCMAS-2) Scores for Children with Specific Learning Disabilities

    E-Print Network [OSTI]

    Raad, Jennifer Marie

    2013-08-31T23:59:59.000Z

    Specific learning disabilities are one of the most common and debilitating disorders experienced by children and adolescents, and students with specific learning disabilities may be particularly vulnerable to anxiety. The ...

  3. DIVISION OF HOUSING AND FOOD SERVICES SERVICES FOR STUDENTS WITH DISABILITIES

    E-Print Network [OSTI]

    Texas at Austin, University of

    ES 5/14 DIVISION OF HOUSING AND FOOD SERVICES SERVICES FOR STUDENTS WITH DISABILITIES REQUEST to release disability related information to the Division of Housing and Food Services as it relates to my requesting the accommodation. This information and the student's signature are required so Services

  4. DIVISION OF HOUSING AND FOOD SERVICES SERVICES FOR STUDENTS WITH DISABILITIES

    E-Print Network [OSTI]

    Texas at Austin, University of

    ES 6/14 DIVISION OF HOUSING AND FOOD SERVICES SERVICES FOR STUDENTS WITH DISABILITIES REQUEST and Food Services (DHFS). Requests will not be processed until both the Request for Housing and Food to release disability related information to the Division of Housing and Food Services as it relates to my

  5. Refractory for Black Liquor Gasifiers

    SciTech Connect (OSTI)

    William L. Headrick Jr; Musa Karakus; Xiaoting Laing

    2005-10-01T23:59:59.000Z

    The University of Missouri-Rolla will identify materials that will permit the safe, reliable and economical operation of combined cycle gasifiers by the pulp and paper industry. The primary emphasis of this project will be to resolve the material problems encountered during the operation of low-pressure high-temperature (LPHT) and low-pressure low-temperature (LPLT) gasifiers while simultaneously understanding the materials barriers to the successful demonstration of high-pressure high-temperature (HPHT) black liquor gasifiers. This study will define the chemical, thermal and physical conditions in current and proposed gasifier designs and then modify existing materials and develop new materials to successfully meet the formidable material challenges. Resolving the material challenges of black liquor gasification combined cycle technology will provide energy, environmental, and economic benefits that include higher thermal efficiencies, up to three times greater electrical output per unit of fuel, and lower emissions. In the near term, adoption of this technology will allow the pulp and paper industry greater capital effectiveness and flexibility, as gasifiers are added to increase mill capacity. In the long term, combined-cycle gasification will lessen the industry's environmental impact while increasing its potential for energy production, allowing the production of all the mill's heat and power needs along with surplus electricity being returned to the grid. An added benefit will be the potential elimination of the possibility of smelt-water explosions, which constitute an important safety concern wherever conventional Tomlinson recovery boilers are operated. Developing cost-effective materials with improved performance in gasifier environments may be the best answer to the material challenges presented by black liquor gasification. Refractory materials may be selected/developed that either react with the gasifier environment to form protective surfaces in-situ; are functionally-graded to give the best combination of thermal, mechanical, and physical properties and chemical stability; or are relatively inexpensive, reliable repair materials. This report covers Task 1.4, Industrial Trial of candidate materials developed by refractory producers and in the laboratory based on the results of Task 1.1, 1.2 and 1.3. Refractories provided by in-kind sponsors to industrial installations tested by cup testing, density/porosity determinations, chemical analysis and microscopy. None of the materials produced in this program have been tried in high temperature gasifiers, but the mortar developed Morcocoat SP-P is outperforming other mortars tested at ORNL. MORCO PhosGun M-90-O has shown in laboratory testing to be an acceptable candidate for hot and cold repairs of existing high temperature gasifiers. It may prove to be an acceptable lining material.

  6. Chin-Lung Wang Professor in Mathematics, NTU

    E-Print Network [OSTI]

    Huang, Su-Yun

    Chin-Lung Wang Position Professor in Mathematics, NTU Research Fields Algebraic Geometry to the non-vanishing conjecture for a pseudo-effective adjoint divisor. I am interested in studying the an

  7. Tumour microenvironment interactions of small cell lung cancer.

    E-Print Network [OSTI]

    Hodkinson, Philip Simon

    2009-01-01T23:59:59.000Z

    Small cell lung cancer (SCLC) is characterised by rapid growth, early metastatic spread and poor long-term survival. The tumour is initially sensitive to chemotherapy and thus objective response rates are high. Unfortunately, ...

  8. Functional lung imaging in humans using Positron Emission Tomography

    E-Print Network [OSTI]

    Layfield, Dominick, 1971-

    2003-01-01T23:59:59.000Z

    This thesis deals with a method of functional lung imaging using Positron Emission Tomography (PET). In this technique, a radioactive tracer, nitrogen-13, is dissolved in saline solution, and injected into a peripheral ...

  9. a549 human lung: Topics by E-print Network

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

    Human (more) Weems, Jessica Marie 2010-01-01 26 KILLING OF TARGET CELLS DUE TO RADON PROGENY IN THE HUMAN LUNG Physics Websites Summary: to the epidemiologically derived value...

  10. aerosol lung inhalation: Topics by E-print Network

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

    This work describes a pilot study to calculate lung dose from the deposition of radon progeny, via estimates of cumulative exposure derived from in vivo measurements of sup 2...

  11. Lung cancer epidemiology in New Mexico uranium miners

    SciTech Connect (OSTI)

    Samet, J.M.

    1991-11-01T23:59:59.000Z

    This investigation assesses the health effects of radon progeny exposure in New Mexico uranium miners. Cumulative exposures sustained by most New Mexico miners are well below those received earlier in the Colorado Plateau. This project utilizes the research opportunity offered by New Mexico miners to address unresolved issues related to radon progeny exposure: (1) the lung cancer risk of lower levels of exposure, (2) interaction between radon progeny exposure and cigarette smoking in the causation of lung cancer, (3) the relationship between lung cancer histologic type and radon progeny exposure, and (4) possible effects of radon progeny exposure other than lung cancer. A cohort study of 3800 men with at least one year of underground uranium mining experience in New Mexico is in progress. Results are discussed.

  12. Selectins Mediate Small Cell Lung Cancer Systemic Metastasis

    E-Print Network [OSTI]

    Heidemann, Franziska

    Metastasis formation is the major reason for the extremely poor prognosis in small cell lung cancer (SCLC) patients. The molecular interaction partners regulating metastasis formation in SCLC are largely unidentified, ...

  13. Thermodynamics of Dyonic Lifshitz Black Holes

    E-Print Network [OSTI]

    Tobias Zingg

    2011-07-15T23:59:59.000Z

    Black holes with asymptotic anisotropic scaling are conjectured to be gravity duals of condensed matter system close to quantum critical points with non-trivial dynamical exponent z at finite temperature. A holographic renormalization procedure is presented that allows thermodynamic potentials to be defined for objects with both electric and magnetic charge in such a way that standard thermodynamic relations hold. Black holes in asymptotic Lifshitz spacetimes can exhibit paramagnetic behavior at low temperature limit for certain values of the critical exponent z, whereas the behavior of AdS black holes is always diamagnetic.

  14. Some remarks on black hole thermodynamics

    E-Print Network [OSTI]

    R. Y. Chiao

    2011-02-04T23:59:59.000Z

    Two thermodynamic "paradoxes" of black hole physics are re-examined. The first is that there is a thermal instability involving two coupled blackbody cavities containing two black holes, and second is that a classical black hole can swallow up entropy in the form of ambient blackbody photons without increasing its mass. The resolution of the second paradox by Bekenstein and by Hawking is re-visited. The link between Hawking radiation and Wigner's superluminal tunneling time is discussed using two equivalent Feynman diagrams, and Feynman's re-interpretation principle.

  15. Spectroscopy and Thermodynamics of MSW Black Hole

    E-Print Network [OSTI]

    Sebastian, Saneesh

    2013-01-01T23:59:59.000Z

    We study the thermodynamics and spectroscopy of a 2+1 dimensional black hole pro- posed by Mandal et. al1 . We put the background space time in Kruskal like co-ordinate and find period with respect to Euclidean time. Different thermodynamic quantities like entropy, specific heat, temperature etc are obtained. The adiabatic invariant for the black hole is found out and quantized using Bohr-Sommerfeld quantization rule. The study shows that the area spectrum of MSW black hole is equally spaced and the value of spacing is found to be h bar

  16. Spectroscopy and Thermodynamics of MSW Black Hole

    E-Print Network [OSTI]

    Saneesh Sebastian; V. C. Kuriakose

    2013-09-02T23:59:59.000Z

    We study the thermodynamics and spectroscopy of a 2+1 dimensional black hole pro- posed by Mandal et. al1 . We put the background space time in Kruskal like co-ordinate and find period with respect to Euclidean time. Different thermodynamic quantities like entropy, specific heat, temperature etc are obtained. The adiabatic invariant for the black hole is found out and quantized using Bohr-Sommerfeld quantization rule. The study shows that the area spectrum of MSW black hole is equally spaced and the value of spacing is found to be h bar

  17. Tunable optical properties of multilayers black phosphorus

    E-Print Network [OSTI]

    Low, Tony; Carvalho, A; Jiang, Yongjin; Wang, Han; Xia, Fengnian; Neto, A H Castro

    2014-01-01T23:59:59.000Z

    We calculated the optical conductivity tensor of multilayers black phosphorus using the Kubo formula within an effective low-energy Hamiltonian. The optical absorption spectra of multilayers black phosphorus are shown to vary sensitively with thickness, doping, and light polarization. In conjunction with experimental spectra obtained from infrared absorption spectroscopy, we discuss the role of interband coupling and disorder on the observed anisotropic absorption spectra. Multilayers black phosphorus might offer attractive alternatives to narrow gap compound semiconductors for optoelectronics across mid- to near-infrared frequencies.

  18. CHARYBDIS: A Black hole event generator.

    E-Print Network [OSTI]

    Harris, Chris M; Richardson, P; Webber, Bryan R

    model of black hole production and decay which can be interfaced to existing Monte Carlo programs using the Les Houches accord [4]. The major new theoretical input to the generator is the inclusion of the recently calculated grey-body factors for black... ? TH geometric arguments show that ?l,m? ? (?rh)2 in any number of dimensions, which means that at high energies the shape of the spectrum is like that of a black body. However the low energy behaviour of the grey-body factors is spin-dependent and also...

  19. Black hole hair in higher dimensions

    E-Print Network [OSTI]

    Chao Cao; Yi-Xin Chen; Jian-Long Li

    2008-04-02T23:59:59.000Z

    We study the property of matter in equilibrium with a static, spherically symmetric black hole in D-dimensional spacetime. It requires this kind of matter has an equation of state (\\omega\\equiv p_r/\\rho=-1/(1+2kn), k,n\\in \\mathbb{N}), which seems to be independent of D. However, when we associate this with specific models, some interesting limits on space could be found: (i)(D=2+2kn) while the black hole is surrounded by cosmic strings; (ii)the black hole can be surrounded by linear dilaton field only in 4-dimensional spacetime. In both cases, D=4 is special.

  20. Morphology of PolyethyleneCarbon Black Composites G. BEAUCAGE,1

    E-Print Network [OSTI]

    Beaucage, Gregory

    Morphology of Polyethylene­Carbon Black Composites G. BEAUCAGE,1 S. RANE,1 D. W. SCHAEFER,1 G. LONG-ray scattering (SAXS) study of a conductive grade of carbon black and carbon black­polymer composites(methyl methacrylate); carbon black; filler; composite; conductivity; percolation INTRODUCTION The morphology

  1. Phase transitions and Geometrothermodynamics of Regular black holes

    E-Print Network [OSTI]

    R. Tharanath; Jishnu Suresh; V. C. Kuriakose

    2014-06-16T23:59:59.000Z

    In this paper we study the thermodynamics and state space geometry of regular black hole solutions such as Bardeen black hole, Ay\\'{o}n-Beato and Garc\\'{i}a black hole, Hayward black hole and Berej-Matyjasek-Trynieki-Wornowicz black hole. We find that all these black holes show second order thermodynamic phase transitions(SOTPT) by observing discontinuities in heat capacity-entropy graphs as well as the cusp type double point in free energy-temperature graph. Using the formulation of geometrothermodynamics we again find the singularities in the heat capacity of the black holes by calculating the curvature scalar of the Legendre invariant metric.

  2. SU-E-J-86: Lobar Lung Function Quantification by PET Galligas and CT Ventilation Imaging in Lung Cancer Patients

    SciTech Connect (OSTI)

    Eslick, E; Kipritidis, J; Keall, P [University of Sydney, Camperdown, NSW (Australia); Bailey, D; Bailey, E [Royal North Shore Hospital, St. Leonards, NSW (Australia)

    2014-06-01T23:59:59.000Z

    Purpose: The purpose of this study was to quantify the lobar lung function using the novel PET Galligas ([68Ga]-carbon nanoparticle) ventilation imaging and the investigational CT ventilation imaging in lung cancer patients pre-treatment. Methods: We present results on our first three lung cancer patients (2 male, mean age 78 years) as part of an ongoing ethics approved study. For each patient a PET Galligas ventilation (PET-V) image and a pair of breath hold CT images (end-exhale and end-inhale tidal volumes) were acquired using a Siemens Biograph PET CT. CT-ventilation (CT-V) images were created from the pair of CT images using deformable image registration (DIR) algorithms and the Hounsfield Unit (HU) ventilation metric. A comparison of ventilation quantification from each modality was done on the lobar level and the voxel level. A Bland-Altman plot was used to assess the difference in mean percentage contribution of each lobe to the total lung function between the two modalities. For each patient, a voxel-wise Spearmans correlation was calculated for the whole lungs between the two modalities. Results: The Bland-Altman plot demonstrated strong agreement between PET-V and CT-V for assessment of lobar function (r=0.99, p<0.001; range mean difference: ?5.5 to 3.0). The correlation between PET-V and CT-V at the voxel level was moderate(r=0.60, p<0.001). Conclusion: This preliminary study on the three patients data sets demonstrated strong agreement between PET and CT ventilation imaging for the assessment of pre-treatment lung function at the lobar level. Agreement was only moderate at the level of voxel correlations. These results indicate that CT ventilation imaging has potential for assessing pre-treatment lobar lung function in lung cancer patients.

  3. Reclaiming Blackness: (Counter) Narratives of Racial Kinship in Black Gay Mens Sexual Stories

    E-Print Network [OSTI]

    Chambers, Christopher Scott

    2012-07-16T23:59:59.000Z

    and Prevention CME Christian Methodist Episcopal church DL Down Low GLBT Gay, Lesbian, Bisexual and Transgendered HIV Human Immunodeficiency Virus MCC Metropolitan Community Church MSM Men Who Have Sex with Men NCBLG National Coalition of Black Lesbians... and Gays SBM Super Black Man SGL Same Gender Loving STDs Sexually Transmitted Diseases The Forum National Black Gay and Lesbian Leadership Forum TVC Traditional Values Coalition x TABLE OF CONTENTS Page ABSTRACT...

  4. Thermodynamics of Schwarzschild-de Sitter black hole: thermal stability of Nariai black hole

    E-Print Network [OSTI]

    Yun Soo Myung

    2008-03-28T23:59:59.000Z

    We study thermodynamics of the Schwarzschild-de Sitter black hole in five dimensions by introducing two temperatures based on the standard and Bousso-Hawking normalizations. We use the first-law of thermodynamics to derive thermodynamic quantities. The two temperatures indicate that the Nariai black hole is thermodynamically unstable. However, it seems that black hole thermodynamics favors the standard normalization, and does not favor the Bousso-Hawking normalization.

  5. Thermodynamics and evaporation of the noncommutative black hole

    E-Print Network [OSTI]

    Yun Soo Myung; Yong-Wan Kim; Young-Jai Park

    2007-01-21T23:59:59.000Z

    We investigate the thermodynamics of the noncommutative black hole whose static picture is similar to that of the nonsingular black hole known as the de Sitter-Schwarzschild black hole. It turns out that the final remnant of extremal black hole is a thermodynamically stable object. We describe the evaporation process of this black hole by using the noncommutativity-corrected Vaidya metric. It is found that there exists a close relationship between thermodynamic approach and evaporation process.

  6. Black hole evolution: I. Supernova-regulated black hole growth

    E-Print Network [OSTI]

    Dubois, Yohan; Silk, Joseph; Devriendt, Julien; Slyz, Adrianne; Teyssier, Romain

    2015-01-01T23:59:59.000Z

    The growth of a supermassive black hole (BH) is determined by how much gas the host galaxy is able to feed it, which in turn is controlled by the cosmic environment, through galaxy mergers and accretion of cosmic flows that time how galaxies obtain their gas, but also by internal processes in the galaxy, such as star formation and feedback from stars and the BH itself. In this paper, we study the growth of a 10^12 Msun halo at z=2, which is the progenitor of an archetypical group of galaxies at z=0, and of its central BH by means of a high-resolution zoomed cosmological simulation, the Seth simulation. We study the evolution of the BH driven by the accretion of cold gas in the galaxy, and explore the efficiency of the feedback from supernovae (SNe). For a relatively inefficient energy input from SNe, the BH grows at the Eddington rate from early times, and reaches self-regulation once it is massive enough. We find that at early cosmic times z>3.5, efficient feedback from SNe forbids the formation of a settled...

  7. Ethnic identification among blacks and whites

    E-Print Network [OSTI]

    Glass, Teresa Gail

    1996-01-01T23:59:59.000Z

    Two central questions drive this research: (1) Are there trends in ethnic identification among blacks and whites; and (2) Are there meaningful differences between groups that identify differently? I use descriptive and regression analysis...

  8. Energy of 4-Dimensional Black Hole, etc

    E-Print Network [OSTI]

    Dmitriy Palatnik

    2011-07-18T23:59:59.000Z

    In this letter I suggest possible redefinition of mass density, not depending on speed of the mass element, which leads to a more simple stress-energy for an object. I calculate energy of black hole.

  9. Topological Black Holes -- Outside Looking In

    E-Print Network [OSTI]

    R. B. Mann

    1997-09-15T23:59:59.000Z

    I describe the general mathematical construction and physical picture of topological black holes, which are black holes whose event horizons are surfaces of non-trivial topology. The construction is carried out in an arbitrary number of dimensions, and includes all known special cases which have appeared before in the literature. I describe the basic features of massive charged topological black holes in $(3+1)$ dimensions, from both an exterior and interior point of view. To investigate their interiors, it is necessary to understand the radiative falloff behaviour of a given massless field at late times in the background of a topological black hole. I describe the results of a numerical investigation of such behaviour for a conformally coupled scalar field. Significant differences emerge between spherical and higher genus topologies.

  10. Horizon Operator Approach to Black Hole Quantization

    E-Print Network [OSTI]

    G. 't Hooft

    1994-02-21T23:59:59.000Z

    The $S$-matrix Ansatz for the construction of a quantum theory of black holes is further exploited. We first note that treating the metric tensor $g_{\\m\

  11. Towards Black Hole Entropy in Shape Dynamics

    E-Print Network [OSTI]

    Gabriel Herczeg; Vasudev Shyam

    2014-10-21T23:59:59.000Z

    Shape dynamics is classical theory of gravity which agrees with general relativity in many important cases, but possesses different gauge symmetries and constraints. Rather than spacetime diffeomorphism invariance, shape dynamics takes spatial diffeomorphism invariance and spatial Weyl invariance as the fundamental gauge symmetries associated with the gravitational field. Since the area of the event horizon of a black hole transforms under a generic spatial Weyl transformation, there has been some doubt that one can speak sensibly about the thermodynamics of black holes in shape dynamics. The purpose of this paper is to show that by treating the event horizon of a black hole as an interior boundary, one can recover familiar notions of black hole thermodynamics in shape dynamics and define a gauge invariant entropy that agrees with general relativity.

  12. BLACK ENGLISH AND THE AMERICAN VALUE SYSTEM

    E-Print Network [OSTI]

    Drake, Glendon F.

    1973-10-01T23:59:59.000Z

    The strategy of enlightened bi-dialectalism used by the schools in the United States to deal with the problem of Black English is a significant attempt at social engineering. This attempt is motivated by basic linguistic ...

  13. The structure of the carbon black flame

    E-Print Network [OSTI]

    Anderson, W. Kermi

    1945-01-01T23:59:59.000Z

    THE STRUCTURE OF THE CARBON BLACK FLAME A Dissertation By W1 111 ami Kermit Anderson THEHSR UCOF Approval as to style and content recommended Head of tiie Department of Chemistry A Dissertation Submitted to the Faculty of the Agricultural... and Mechanical College of. Texas in Parti ail Fulfilment of the Requirements for the Degree of Doctor of Philosophy THE STRUCTURE OF THE CARBON BLACK FLAME Major Subject: Chemistry AB William Hermit Anderson:\\ t * August 1945 THE STRUCTURE OF THE. CARBON...

  14. Notes on Black Hole Fluctuations and Backreaction

    E-Print Network [OSTI]

    B. L. Hu; Alpan Raval; Sukanya Sinha

    1999-01-05T23:59:59.000Z

    In these notes we prepare the ground for a systematic investigation into the issues of black hole fluctuations and backreaction by discussing the formulation of the problem, commenting on possible advantages and shortcomings of existing works, and introducing our own approach via a stochastic semiclassical theory of gravity based on the Einstein-Langevin equation and the fluctuation-dissipation relation for a self-consistent description of metric fluctuations and dissipative dynamics of the black hole with backreaction of its Hawking radiance.

  15. Electromagnetic Beams Overpass the Black Hole Horizon

    E-Print Network [OSTI]

    Alexander Burinskii

    2008-06-16T23:59:59.000Z

    We show that the electromagnetic excitations of the Kerr black hole have very strong back reaction on metric. In particular, the electromagnetic excitations aligned with the Kerr congruence form the light-like beams which overcome horizon, forming the holes in it, which allows matter to escape interior. So, there is no information lost inside the black hole. This effect is based exclusively on the analyticity of the algebraically special solutions.

  16. Duke University/Health System Disability Management System, 402 Oregon Street, Box 90142, Telephone: (919) 668-6213 Fax: (919) 668-3977 TTY (919) 668-1329

    E-Print Network [OSTI]

    Oren, Ram

    Duke University/Health System Disability Management System, 402 Oregon Street, Box 90142, Telephone,000 ­ Send Accommodation Fund application to the Disability Management System at (919) 668-6213 or leigh be obtained through the Disability Management System, or downloaded from the Disability Management System

  17. Tritium level along Romanian Black Sea Coast

    SciTech Connect (OSTI)

    Varlam, C.; Stefanescu, I.; Popescu, I.; Faurescu, I. [National Inst. for Cryogenic and Isotopic Technologies, PO Box 10, Rm. Valcea, 24050 (Romania)

    2008-07-15T23:59:59.000Z

    Establishing the tritium level along the Romanian Black Sea Coast, after 10 years of exploitation of the nuclear power plant from Cernavoda, is a first step in evaluating its impact on the Black Sea ecosystem. The monitoring program consists of tritium activity concentration measurement in sea water and precipitation from Black Sea Coast between April 2005 and April 2006. The sampling points were spread over the Danube-Black Sea Canal - before the locks Agigea and Navodari, and Black Sea along the coast to the Bulgarian border. The average tritium concentration in sea water collected from the sampling locations had the value of 11.1 {+-} 2.1 TU, close to tritium concentration in precipitation. Although an operating nuclear power plant exists in the monitored area, the values of tritium concentration in two locations are slightly higher than those recorded elsewhere. To conclude, it could be emphasized that until now, Cernavoda NPP did not had any influence on the tritium concentration of the Black Sea Shore. (authors)

  18. Black liquor gasifier/gas turbine cogeneration

    SciTech Connect (OSTI)

    Consonni, S. [Politecnico di Milano (Italy). Dept. di Energetica; Larson, E.D.; Keutz, T.G. [Princeton Univ., NJ (United States); Berglin, N. [Chalmers Univ. of Technology, Goteborg (Sweden). Dept. of Heat and Power Technology

    1998-07-01T23:59:59.000Z

    The kraft process dominates pulp and paper production worldwide. Black liquor, a mixture of lignin and inorganic chemicals, is generated in this process as fiber is extracted from wood. At most kraft mills today, black liquor is burned in Tomlinson boilers to produce steam for on-site heat and power and to recover the inorganic chemicals for reuse in the process. Globally, the black liquor generation rate is about 85,000 MW{sub fuel} (or 0.5 million tonnes of dry solids per day), with nearly 50% of this in North America. The majority of presently installed Tomlinson boilers will reach the end of their useful lives during the next 5 to 20 years. As a replacement for Tomlinson-based cogeneration, black liquor-gasifier/gas turbine cogeneration promises higher electrical efficiency, with prospective environmental, safety, and capital cost benefits for kraft mills. Several companies are pursuing commercialization of black liquor gasification for gas turbine applications. This paper presents results of detailed performance modeling of gasifier/gas turbine cogeneration systems using different black liquor gasifiers modeled on proposed commercial designs.

  19. Asymptotically Lifshitz brane-world black holes

    SciTech Connect (OSTI)

    Ranjbar, Arash, E-mail: a_ranjbar@sbu.ac.ir; Sepangi, Hamid Reza, E-mail: hr-sepangi@sbu.ac.ir; Shahidi, Shahab, E-mail: s_shahidi@sbu.ac.ir

    2012-12-15T23:59:59.000Z

    We study the gravity dual of a Lifshitz field theory in the context of a RSII brane-world scenario, taking into account the effects of the extra dimension through the contribution of the electric part of the Weyl tensor. We study the thermodynamical behavior of such asymptotically Lifshitz black holes. It is shown that the entropy imposes the critical exponent z to be bounded from above. This maximum value of z corresponds to a positive infinite entropy as long as the temperature is kept positive. The stability and phase transition for different spatial topologies are also discussed. - Highlights: Black-Right-Pointing-Pointer Studying the gravity dual of a Lifshitz field theory in the context of brane-world scenario. Black-Right-Pointing-Pointer Studying the thermodynamical behavior of asymptotically Lifshitz black holes. Black-Right-Pointing-Pointer Showing that the entropy imposes the critical exponent z to be bounded from above. Black-Right-Pointing-Pointer Discussing the phase transition for different spatial topologies.

  20. Black Carbons Properties and Role in the Environment: A Comprehensive Review

    E-Print Network [OSTI]

    Shrestha, Gyami

    2010-01-01T23:59:59.000Z

    H. Can reducing black carbon emissions counteract globalinventory of black carbon emissions. Atmos. Environ. 1993,commonly studied form of carbon emissions. Black carbon (BC)

  1. Instructional Practices that Promote Acquisition and Generalization of Skills by Learning Disabled Adolescents

    E-Print Network [OSTI]

    Deshler, Donald D.; Alley, Gordon R.; Warner, Michael M.; Schumaker, Jean B.

    1980-01-01T23:59:59.000Z

    While most efforts in programming for learning disabled adolescents have been directed to the content of instructional offering, the authors identify procedures to promote acquisition and generalization of skills . Exemplified ...

  2. Rehabilitation engineers help people with disabilities with wireless technology LATEST NEWS

    E-Print Network [OSTI]

    Information Technology Management & Policy Sciences RELATED LINKS - Economic Development News - GTRI Annual two parallel goals: (1) to develop new and innovative ways of applying mobile wireless technologiesRehabilitation engineers help people with disabilities with wireless technology SEARCH LATEST NEWS

  3. Therapeutic Camps as Respite Care Providers: Benefits for Families of Children with Disabilities

    E-Print Network [OSTI]

    Shelton, Kyle J.

    2011-02-22T23:59:59.000Z

    ), as well as other chronic illnesses (Florian & Krulik, 1991). Other studies also found that a child?s disability was negatively related to the parents? psychological health (Hauenstein, 1990; Waddington & Buschrossnagel, 1992). Taken together...

  4. Artificial Tongue-Placed Tactile Biofeedback for perceptual supplementation: application to human disability and biomedical engineering

    E-Print Network [OSTI]

    Vuillerme, Nicolas; Moreau-Gaudry, Alexandre; Demongeot, Jacques; Payan, Yohan

    2007-01-01T23:59:59.000Z

    The present paper aims at introducing the innovative technologies, based on the concept of "sensory substitution" or "perceptual supplementation", we are developing in the fields of human disability and biomedical engineering. Precisely, our goal is to design, develop and validate practical assistive biomedical and/technical devices and/or rehabilitating procedures for persons with disabilities, using artificial tongue-placed tactile biofeedback systems. Proposed applications are dealing with: (1) pressure sores prevention in case of spinal cord injuries (persons with paraplegia, or tetraplegia); (2) ankle proprioceptive acuity improvement for driving assistance in older and/or disabled adults; and (3) balance control improvement to prevent fall in older and/or disabled adults. This paper presents results of three feasibility studies performed on young healthy adults.

  5. Examining Employer Attitudes and Valued Employability Skills For Individuals With and Without Disabilities

    E-Print Network [OSTI]

    Ju, Song

    2012-10-19T23:59:59.000Z

    This dissertation presents three separate studies designed to examine perspectives on employment for individuals with disabilities from employers and educators. First, a literature review was conducted on the studies published in the past decade...

  6. The Impact of Major Events on the Lives of Family Caregivers of Children with Disabilities

    E-Print Network [OSTI]

    McDonald, Thomas P.; Couchonnal, Graciela; Early, Theresa

    1996-01-01T23:59:59.000Z

    The authors examine the family caregiving experience among families with children with severe emotional disabilities from a perspective that recognizes the importance of the family's views and feelings. This viewpoint ...

  7. Human-Centered Public Transportation Systems for Persons with Cognitive Disabilities

    E-Print Network [OSTI]

    Fischer, Gerhard

    Human-Centered Public Transportation Systems for Persons with Cognitive Disabilities -- Challenges to use mainstream public transportation systems. This project faces two unique challenges: (1) there are no true "experts" who understand all facets of public transportation system design, operation

  8. The Medicaid Medically Improved Group: Losing Disability Status and Growing Earnings

    E-Print Network [OSTI]

    Hall, Jean P.; Thomas, Kathleen C.

    2014-01-01T23:59:59.000Z

    Objectives: Under the Ticket to Work and Work Incentives Improvement Act (PL 106-170), states may extend Medicaid Buy-In coverage to a medically improved group. Improved group coverage allows adults with disabilities ...

  9. A Research Strategy for Studying Learning Disabled Adolescents and Young Adults

    E-Print Network [OSTI]

    Schumaker, Jean B.; Alley, Gordon R.; Warner, Michael M.; Deshler, Donald D.

    1980-01-01T23:59:59.000Z

    Unique problems related to adolescents and young adults which researchers must consider in designing interventions are discussed. These unique factors associate with the condition of learning disabilities in adolescents ...

  10. Research Approaches to Studying the Link Between Learning Disabilities and Juvenile Delinquency

    E-Print Network [OSTI]

    Hazel, J. Stephen; Schumaker, Jean B.; Deshler, Donald D.

    1980-01-01T23:59:59.000Z

    A relationship between learning disabilities and juvenile delinquency has been hypothesized for a period of time. Research on this relationship has been clouded with methodological difficulties. These problems include the ...

  11. Assumptions and Strategies for Conducting Research with Learning Disabled Adolescents and Young Adults

    E-Print Network [OSTI]

    Meyen, Edward L.; Schiefelbusch, Richard L.; Deshler, Donald D.; Alley, Gordon R.; Moran, Mary Ross; Clark, Frances L.

    1980-01-01T23:59:59.000Z

    This paper details the assumptions about learning disabled adolescents and young adults as well as assumptions about conducting research with this population held by researchers at the Kansas Institute. Strategies developed ...

  12. Studying the Learning Disabled Adolescent Through Epidemiological and Intervention Research Tactics

    E-Print Network [OSTI]

    Altman, Reuben

    1980-01-01T23:59:59.000Z

    This paper examines the relationship between epidemiological and intervention research with learning disabled adolescents. Several historical trends and contemporary issues (e.g., the importance of prevention as opposed ...

  13. Examining individual and ecological predictors of the self-determination of students with disabilities

    E-Print Network [OSTI]

    Shogren, Karrie A.; Wehmeyer, Michael L.; Palmer, Susan B.; Soukup, Jane Helen; Little, Todd D.; Garner, Nancy; Lawrence, Margaret

    2007-01-01T23:59:59.000Z

    This article examines the impact of multiple individual and ecological factors on the self-determination of students with learning disabilities, mild and moderate mental retardation, and other health impairments. Baseline ...

  14. The relationship between disability and depression in multiple sclerosis: the role of uncertainty, coping, and hope.

    E-Print Network [OSTI]

    Lynch, Sharon G.; Kroencke, Dawn C.; Denney, Douglas R.

    2001-12-01T23:59:59.000Z

    The relationship between disability and depression was studied in 188 patients with clinically definite multiple sclerosis (MS). Patients were administered the Zung Self-Rating Depression Scale, Ways of Coping, Uncertainty ...

  15. Predicting School Readiness for Low-Income Children With Disability Risks Identified Early.

    E-Print Network [OSTI]

    Jeon, Hyun-Joo; Peterson, Carla A.; Wall, Shavaun; Carta, Judith J.; Gayle, Luze; Eshbaugh, Elaine M.; Swanson, Mark

    2011-01-01T23:59:59.000Z

    This study examined school readiness at kindergarten entry for low-income children whose disability indicators were identified before age 3. Data were collected as part ofthe Early Head Start Research and Evaluation ...

  16. Holographic superconductor in the exact hairy black hole

    E-Print Network [OSTI]

    Yun Soo Myung; Chanyong Park

    2011-09-13T23:59:59.000Z

    We study the charged black hole of hyperbolic horizon with scalar hair (charged Martinez-Troncoso-Zanelli: CMTZ black hole) as a model of analytic hairy black hole for holographic superconductor. For this purpose, we investigate the second order phase transition between CMTZ and hyperbolic Reissner-Nordstr\\"om-AdS (HRNAdS) black holes. However, this transition unlikely occur. As an analytic treatment for holographic superconductor, we develop superconductor in the bulk and superfluidity on the boundary using the CMTZ black hole below the critical temperature. The presence of charge destroys the condensates around the zero temperature, which is in accord with the thermodynamic analysis of the CMTZ black hole.

  17. E-Print Network 3.0 - a549 lung cancer Sample Search Results

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

    and lung cancer: systematic review and meta-analysis of casecontrol Summary: Household coal use and lung cancer: systematic review and meta-analysis of case-control studies... ,...

  18. A review of "A History of Intelligence and 'Intellectual Disability'" by C. F. Goodey

    E-Print Network [OSTI]

    Navarro, Mara G.

    2013-01-01T23:59:59.000Z

    the concepts of intellectual ability and disability became part of psychology, medicine and biology. Focusing on the period between the Protestant Reform and 1700, this book shows that in many cases it has been accepted without scienti#15;c and psychological... will in Protestant theology. However, it is important to not forget that this diagnostic is not equivalent to the author?s claim to regard intelligence and intellectual disability as historical contingences. #14;e book is well structured. Having in mind...

  19. Access to health care for individuals with developmental disabilities from minority backgrounds

    E-Print Network [OSTI]

    Reichard, Amanda; Sacco, T. M.; Turnbull, H. Rutherford

    2011-12-27T23:59:59.000Z

    MENTAL RETARDATION VOLUME 42, NUMBER 6: 459470 DECEMBER 2004 459qAmerican Association on Mental Retardation Access to Health Care for Individuals With Developmental Disabilities From Minority Backgrounds Amanda Reichard, Therese Marie Sacco, and H.... Rutherford Turnbull, III Abstract In this project we examined access to health care by individuals with developmental disabilities in Kansas from low-income populations and from minority backgrounds. Four criteria for deter- mining access were employed...

  20. Children with disabilities in the context of disaster: A social vulnerability perspective

    E-Print Network [OSTI]

    Stough, Laura

    2010-01-01T23:59:59.000Z

    draw on empirical studies from disaster researchers and focus on the adverse physical, psychological, and educational vulnera- bilities that children with disabilities may experi- ence in the context of disaster. We conclude with a discussion... of the theory of resilience as it per- tains to children with disabilities in disaster and outline additional research needs. Social Vulnerability and Disaster Historically, disasters have been viewed as random events that cause indiscriminate losses and suffer...

  1. Perturbative String Thermodynamics near Black Hole Horizons

    E-Print Network [OSTI]

    Thomas G. Mertens; Henri Verschelde; Valentin I. Zakharov

    2014-10-29T23:59:59.000Z

    We provide further computations and ideas to the problem of near-Hagedorn string thermodynamics near (uncharged) black hole horizons, building upon our earlier work JHEP 1403 (2014) 086. The relevance of long strings to one-loop black hole thermodynamics is emphasized. We then provide an argument in favor of the absence of $\\alpha'$-corrections for the (quadratic) heterotic thermal scalar action in Rindler space. We also compute the large $k$ limit of the cigar orbifold partition functions (for both bosonic and type II superstrings) which allows a better comparison between the flat cones and the cigar cones. A discussion is made on the general McClain-Roth-O'Brien-Tan theorem and on the fact that different torus embeddings lead to different aspects of string thermodynamics. The black hole/string correspondence principle for the 2d black hole is discussed in terms of the thermal scalar. Finally, we present an argument to deal with arbitrary higher genus partition functions, suggesting the breakdown of string perturbation theory (in $g_s$) to compute thermodynamical quantities in black hole spacetimes.

  2. The Environmental Impact of Supermassive Black Holes

    E-Print Network [OSTI]

    Abraham Loeb

    2004-08-10T23:59:59.000Z

    The supermassive black holes observed at the centers of almost all present-day galaxies, had a profound impact on their environment. I highlight the principle of self-regulation, by which supermassive black holes grow until they release sufficient energy to unbind the gas that feeds them from their host galaxy. This principle explains several observed facts, including the correlation between the mass of a central black hole and the depth of the gravitational potential well of its host galaxy, and the abundance and clustering properties of bright quasars in the redshift interval of z~2-6. At lower redshifts, quasars might have limited the maximum mass of galaxies through the suppression of cooling flows in X-ray clusters. The seeds of supermassive black holes were likely planted in dwarf galaxies at redshifts z>10, through the collapse of massive or supermassive stars. The minimum seed mass can be identified observationally through the detection of gravitational waves from black hole binaries by Advanced LIGO or LISA. Aside from shaping their host galaxies, quasar outflows filled the intergalactic medium with magnetic fields and heavy elements. Beyond the reach of these outflows, the brightest quasars at z>6 have ionized exceedingly large volumes of gas (tens of comoving Mpc) prior to global reionization, and must have suppressed the faint end of the galaxy luminosity function in these volumes before the same occurred through the rest of the universe.

  3. Investigating Dark Energy with Black Hole Binaries

    E-Print Network [OSTI]

    Laura Mersini-Houghton; Adam Kelleher

    2009-06-08T23:59:59.000Z

    The accelerated expansion of the universe is ascribed to the existence of dark energy. Black holes accretion of dark energy induces a mass change proportional to the energy density and pressure of the background dark energy fluid. The time scale during which the mass of black holes changes considerably is too long relative to the age of the universe, thus beyond detection possibilities. We propose to take advantage of the modified black hole masses for exploring the equation of state $w[z]$ of dark energy, by investigating the evolution of supermassive black hole binaries on a dark energy background. Deriving the signatures of dark energy accretion on the evolution of binaries, we find that dark energy imprints on the emitted gravitational radiation and on the changes in the orbital radius of the binary can be within detection limits for certain supermassive black hole binaries. In this talk I describe how binaries can provide a useful tool in obtaining complementary information on the nature of dark energy, based on the work done with A.Kelleher.

  4. Black Holes with Flavors of Quantum Hair?

    E-Print Network [OSTI]

    Gia Dvali

    2006-07-20T23:59:59.000Z

    We show that black holes can posses a long-range quantum hair of super-massive tensor fields, which can be detected by Aharonov-Bohm tabletop interference experiments, in which a quantum-hairy black hole, or a remnant particle, passes through the loop of a magnetic solenoid. The long distance effect does not decouple for an arbitrarily high mass of the hair-providing field. Because Kaluza-Klein and String theories contain infinite number of massive tensor fields, we study black holes with quantum Kaluza-Klein hair. We show that in five dimensions such a black hole can be interpreted as a string of `combed' generalized magnetic monopoles, with their fluxes confined along it. For the compactification on a translation-invariant circle, this substructure uncovers hidden flux conservation and quantization of the monopole charges, which constrain the quantum hair of the resulting four-dimensional black hole. For the spin-2 quantum hair this result is somewhat unexpected, since the constituent `magnetic' charges have no `electric' counterparts. Nevertheless, the information about their quantization is encoded in singularity.

  5. Perfusion lung scan: an aid in detection of lymphangitic carcinomatosis

    SciTech Connect (OSTI)

    Bates, S.E.; Tranum, B.L.

    1982-07-15T23:59:59.000Z

    Lymphangitic carcinomatosis is usually a late manifestation of metastatic disease. The patient usually presents with cough or dyspnea, and the chest radiograph is often nondiagnostic. Two patients are presented who developed symptoms while on adjuvant chemotherapy. Both had abnormal perfusion lung scans. One had matching ventilation defects; the other a normal ventilation study. Biopsy revealed metastatic carcinoma; in one case tumor was seen in both the pulmonary lymphatics and arterioles; in the other, tumor was identified but the site could not be specified. The radionuclide lung scan is a technique which can speed diagnosis and institution of therapy in lymphangitic carcinomatosis.

  6. Comment on ``Ultrasound-induced lung hemorrhage is not caused by inertial cavitation''

    E-Print Network [OSTI]

    Illinois at Urbana-Champaign, University of

    Comment on ``Ultrasound-induced lung hemorrhage is not caused by inertial cavitation'' [J. Acoust­1297 2000 that ultrasound-induced lung hemorrhage is not caused by inertial cavitation. An argument is provided that illustrates how cavitation inception conditions in the lungs of animals are not altered

  7. Neutrino Majorana Mass from Black Hole

    E-Print Network [OSTI]

    Yosuke Uehara

    2002-05-25T23:59:59.000Z

    We propose a new mechanism to generate the neutrino Majorana mass in TeV-scale gravity models. The black hole violates all non-gauged symmetries and can become the origin of lepton number violating processes. The fluctuation of higher-dimensional spacetime can result in the production of a black hole, which emits 2 neutrinos. If neutrinos are Majorana particles, this process is equivalent to the free propagation of a neutrino with the insertion of the black hole. From this fact, we derive the neutrino Majorana mass. The result is completely consistent with the recently observed evidence of neutrinoless double beta decay. And the obtained neutrino Majorana mass satisfies the constraint from the density of the neutrino dark matter, which affects the cosmic structure formation. Furthermore, we can explain the ultrahigh energy cosmic rays by the Z-burst scenario with it.

  8. Black Hole Chromosphere at the LHC

    E-Print Network [OSTI]

    Luis Anchordoqui; Haim Goldberg

    2003-02-26T23:59:59.000Z

    If the scale of quantum gravity is near a TeV, black holes will be copiously produced at the LHC. In this work we study the main properties of the light descendants of these black holes. We show that the emitted partons are closely spaced outside the horizon, and hence they do not fragment into hadrons in vacuum but more likely into a kind of quark-gluon plasma. Consequently, the thermal emission occurs far from the horizon, at a temperature characteristic of the QCD scale. We analyze the energy spectrum of the particles emerging from the "chromosphere", and find that the hard hadronic jets are almost entirely suppressed. They are replaced by an isotropic distribution of soft photons and hadrons, with hundreds of particles in the GeV range. This provides a new distinctive signature for black hole events at LHC.

  9. Black Hole Complementarity in Gravity's Rainbow

    E-Print Network [OSTI]

    Gim, Yongwan

    2015-01-01T23:59:59.000Z

    We calculate the required energy for duplication of information in the context of black hole complementarity in the rainbow Schwarzschild black hole. The resultant energy can be written as the well-defined limit given by the conventional result for the vanishing rainbow parameter which characterizes the deformation of the relativistic dispersion relation in the freely falling frame. It shows that the duplication of information in quantum mechanics could be not allowed below a certain critical value of the rainbow parameter; however, it could be possible above the critical value of the rainbow parameter, so that the consistent formulation in the rainbow Schwarzschild black hole requires additional constraints or any other resolutions for the latter case.

  10. Extremal limits and black hole entropy

    E-Print Network [OSTI]

    Sean M. Carroll; Matthew C. Johnson; Lisa Randall

    2009-01-08T23:59:59.000Z

    Taking the extremal limit of a non-extremal Reissner-Nordstr\\"om black hole (by externally varying the mass or charge), the region between the inner and outer event horizons experiences an interesting fate -- while this region is absent in the extremal case, it does not disappear in the extremal limit but rather approaches a patch of $AdS_2\\times S^2$. In other words, the approach to extremality is not continuous, as the non-extremal Reissner-Nordstr\\"om solution splits into two spacetimes at extremality: an extremal black hole and a disconnected $AdS$ space. We suggest that the unusual nature of this limit may help in understanding the entropy of extremal black holes.

  11. Regional Normal Lung Tissue Density Changes in Patients Treated With Stereotactic Body Radiation Therapy for Lung Tumors

    SciTech Connect (OSTI)

    Diot, Quentin, E-mail: quentin.diot@ucdenver.edu [Department of Radiation Oncology, University of Colorado School of Medicine, Aurora, Colorado (United States)] [Department of Radiation Oncology, University of Colorado School of Medicine, Aurora, Colorado (United States); Kavanagh, Brian; Schefter, Tracey; Gaspar, Laurie; Stuhr, Kelly; Miften, Moyed [Department of Radiation Oncology, University of Colorado School of Medicine, Aurora, Colorado (United States)] [Department of Radiation Oncology, University of Colorado School of Medicine, Aurora, Colorado (United States)

    2012-11-15T23:59:59.000Z

    Purpose: To describe regional lung tissue density changes in normal lung tissue of patients with primary and metastatic lung tumors who received stereotactic body radiation therapy (SBRT). Methods and Materials: A total of 179 post-SBRT follow-up computed tomography (CT) scans of 62 patients who received SBRT between 2003 and 2009 were studied. Median prescription dose was 54 Gy (range, 30-60 Gy) in 3 to 5 fractions. SBRT-induced lung density changes on post-SBRT follow-up CT were evaluated at approximately 3, 6, 12, 18, 24, and 30 months after treatment. Dose-response curves (DRC) were generated for SBRT-induced lung damage by averaging CT number (HU) changes for regions of the lungs receiving the same dose at 5-Gy intervals. Results: For all follow-up interval periods, CT numbers linearly increased with dose until 35 Gy and were constant thereafter. For 3, 18, 24, and 30 months, the rate of relative electron density increase with dose was approximately 0.24% per Gy. At 6 months, the rate was also similar below 20 Gy but then rose to 0.6% per Gy above this threshold. After 6 months, DRCs were mostly time-independent. When split between patients treated with 3 fractions of 12 to 20 Gy (median, 20 Gy; average tumor volume, 12 {+-} 16 cm{sup 3}) and with >3 fractions of 6 to 12.5 Gy (median, 9 Gy; average tumor volume, 30 {+-} 40 cm{sup 3}), DRCs differed significantly. In both cases, CT changes at 3, 18, 24, and 30 months were identical to those of the population DRC; however, patients who received >3 fractions showed 6-month CT changes that were more than twice those for the group that received 3 fractions. Conclusions: This analysis of SBRT-induced normal lung density changes indicates that lung normal tissue has more pronounced self-limited acute effects than late effects. Differences in acute CT changes following treatments in 3 fractions were considerably less than for treatments in >3 fractions.

  12. Legendary Tuskegee Airmen to Speak at Jefferson Lab's Black History...

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

    Lab's Black History Month Event February 3, 2004 Three members of the legendary, World War II era Tuskegee Airmen will speak at Jefferson Lab's Black History Month celebration at...

  13. Improved recovery of tall oil from black liquors

    SciTech Connect (OSTI)

    Zucker, J.

    1980-12-09T23:59:59.000Z

    Applying a d.c. of less than 15 V to acidified black liquor separates a significant amount of tall oil remaining in the black liquor sludge. An apparatus with graphite electrodes for this process is described.

  14. Topological black holes in Horava-Lifshitz gravity

    SciTech Connect (OSTI)

    Cai Ronggen [Key Laboratory of Frontiers in Theoretical Physics, Institute of Theoretical Physics, Chinese Academy of Sciences, P.O. Box 2735, Beijing 100190 (China) and Kavli Institute for Theoretical Physics China (KITPC), Chinese Academy of Sciences, P.O. Box 2735, Beijing 100190 (China); Cao Liming [Asia Pacific Center for Theoretical Physics, Pohang, Gyeongbuk 790-784 (Korea, Republic of); Ohta, Nobuyoshi [Department of Physics, Kinki University, Higashi-Osaka, Osaka 577-8502 (Japan)

    2009-07-15T23:59:59.000Z

    We find topological (charged) black holes whose horizon has an arbitrary constant scalar curvature 2k in Horava-Lifshitz theory. Without loss of generality, one may take k=1, 0, and -1. The black hole solution is asymptotically anti-de Sitter with a nonstandard asymptotic behavior. Using the Hamiltonian approach, we define a finite mass associated with the solution. We discuss the thermodynamics of the topological black holes and find that the black hole entropy has a logarithmic term in addition to an area term. We find a duality in Hawking temperature between topological black holes in Horava-Lifshitz theory and Einstein's general relativity: the temperature behaviors of black holes with k=1, 0, and -1 in Horava-Lifshitz theory are, respectively, dual to those of topological black holes with k=-1, 0, and 1 in Einstein's general relativity. The topological black holes in Horava-Lifshitz theory are thermodynamically stable.

  15. Black Hills Energy (Gas)- Residential Energy Efficiency Rebate Programs

    Broader source: Energy.gov [DOE]

    Black Hills Energy offers its residential Iowa customers incentives to encourage energy efficiency in their homes. Black Hills Energy offers a free home energy evaluation to customers (both owners...

  16. The Development of the Emerald Programming Language Andrew P. Black

    E-Print Network [OSTI]

    Black, Andrew P.

    The Development of the Emerald Programming Language Andrew P. Black Portland State University black@cs.pdx.edu Norman C. Hutchinson University of British Columbia norm@cs.ubc.ca Eric Jul University of Copenhagen eric

  17. Dynamics of galaxy cores and supermassive black holes

    E-Print Network [OSTI]

    David Merritt

    2006-05-02T23:59:59.000Z

    Recent work on the dynamical evolution of galactic nuclei containing supermassive black holes is reviewed. Topics include galaxy structural properties; collisionless and collisional equilibria; loss-cone dynamics; and dynamics of binary and multiple supermassive black holes.

  18. CHARYBDIS: A Black Hole Event Generator

    E-Print Network [OSTI]

    C. M. Harris; P. Richardson; B. R. Webber

    2003-07-24T23:59:59.000Z

    CHARYBDIS is an event generator which simulates the production and decay of miniature black holes at hadronic colliders as might be possible in certain extra dimension models. It interfaces via the Les Houches accord to general purpose Monte Carlo programs like HERWIG and PYTHIA which then perform the parton evolution and hadronization. The event generator includes the extra-dimensional `grey-body' effects as well as the change in the temperature of the black hole as the decay progresses. Various options for modelling the Planck-scale terminal decay are provided.

  19. Might black holes reveal their inner secrets?

    E-Print Network [OSTI]

    Ted Jacobson; Thomas P. Sotiriou

    2010-06-09T23:59:59.000Z

    Black holes harbor a spacetime singularity of infinite curvature, where classical spacetime physics breaks down, and current theory cannot predict what will happen. However, the singularity is invisible from the outside because strong gravity traps all signals, even light, behind an event horizon. In this essay we discuss whether it might be possible to destroy the horizon, if a body is tossed into the black hole so as to make it spin faster and/or have more charge than a certain limit. It turns out that one could expose a "naked" singularity if effects of the body's own gravity can be neglected. We suspect however that such neglect is unjustified.

  20. BLACK HOLE ENTROPY IN HIGHER CURVATURE GRAVITY

    E-Print Network [OSTI]

    TED JACOBSON; GUNGWON KANG; ROBERT C. MYERS

    1995-02-27T23:59:59.000Z

    We discuss some recent results on black hole thermodynamics within the context of effective gravitational actions including higher-curvature interactions. Wald's derivation of the First Law demonstrates that black hole entropy can always be expressed as a local geometric density integrated over a space-like cross-section of the horizon. In certain cases, it can also be shown that these entropy expressions satisfy a Second Law. One such simple example is considered from the class of higher curvature theories where the Lagrangian consists of a polynomial in the Ricci scalar.

  1. How red is a quantum black hole?

    E-Print Network [OSTI]

    Viqar Husain; Oliver Winkler

    2005-05-30T23:59:59.000Z

    Radiating black holes pose a number of puzzles for semiclassical and quantum gravity. These include the transplanckian problem -- the nearly infinite energies of Hawking particles created near the horizon, and the final state of evaporation. A definitive resolution of these questions likely requires robust inputs from quantum gravity. We argue that one such input is a quantum bound on curvature. We show how this leads to an upper limit on the redshift of a Hawking emitted particle, to a maximum temperature for a black hole, and to the prediction of a Planck scale remnant.

  2. Black nickel selective absorber, optimization of parameters

    SciTech Connect (OSTI)

    Akinoglu, B.; Cercioglu, V.; Ecevit, A.

    1983-12-01T23:59:59.000Z

    Electroplated black nickel selective absorber is one of the most commercially used element of solar energy systems. Electrodeposition parameters such as time of deposition, pH, current density, electrolyte temperature should be optimized to produce the most efficient selective absorber. The topology of the substrate material is very effective on selectivity and it should also be optimized. In this study, by controlling the conditions of electrodeposition black nickel selective absorbers are produced and their reflectivities are measured. The effects of the electrodeposition parameters together with the topology of the substrate, on the selective properties are investigated.

  3. Tachyon Perturbation on Two Dimensional Black Hole

    E-Print Network [OSTI]

    Aniket Basu

    2014-07-03T23:59:59.000Z

    We study the black hole geometry in the presence of tachyonic perturbations, and solve for the form of allowed tachyonic hair in the presence of back reaction, and for the form of the metric under the assumption that only the metric is perturbed but not the dilaton. We evaluate the Kretschmann scalar and argue that the horizon becomes singular in the presence of tachyons, implying that the black hole has turned into a naked singularity. A form of the allowed tachyon potential emerges as a requirement of self-consistency of our solution.

  4. Chaotic Information Processing by Extremal Black Holes

    E-Print Network [OSTI]

    Axenides, Minos; Nicolis, Stam

    2015-01-01T23:59:59.000Z

    We review an explicit regularization of the AdS$_2$/CFT$_1$ correspondence, that preserves all isometries of bulk and boundary degrees of freedom. This scheme is useful to characterize the space of the unitary evolution operators that describe the dynamics of the microstates of extremal black holes in four spacetime dimensions. Using techniques from algebraic number theory to evaluate the transition amplitudes, we remark that the regularization scheme expresses the fast quantum computation capability of black holes as well as its chaotic nature.

  5. BlackGold Biofuels | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Office of InspectorConcentrating SolarElectricEnergyCTBarre BiomassTHIS PAGE ISJump to: navigation,BlackBlackGold

  6. Low Floor Americans with Disabilities Compliant Alternate Fuel Vehicle Project

    SciTech Connect (OSTI)

    James Bartel

    2004-11-26T23:59:59.000Z

    This project developed a low emission, cost effective, fuel efficient, medium-duty community/transit shuttle bus that meets American's with Disabilities Act (ADA) requirements and meets National Energy Policy Act requirements (uses alternative fuel). The Low Profile chassis, which is the basis of this vehicle is configured to be fuel neutral to accommodate various alternative fuels. Demonstration of the vehicle in Yellowstone Park in summer (wheeled operation) and winter (track operation) demonstrated the feasibility and flexibility for this vehicle to provide year around operation throughout the Parks system as well as normal transit operation. The unique configuration of the chassis which provides ADA access with a simple ramp and a flat floor throughout the passenger compartment, provides maximum access for all passengers as well as maximum flexibility to configure the vehicle for each application. Because this product is derived from an existing medium duty truck chassis, the completed bus is 40-50% less expensive than existing low floor transit buses, with the reliability and durability of OEM a medium duty truck.

  7. Isotope Biogeochemistry of Diagenesis caused by a Black

    E-Print Network [OSTI]

    the coasts of Surinam and French Guyana #12;µ Black shales in Leg 207 sediments and pore water response depth

  8. Can the fluctuations of a black hole be treated thermodynamically?

    E-Print Network [OSTI]

    Kostyantyn Ropotenko

    2008-03-31T23:59:59.000Z

    Since the temperature of a typical Schwarzschild black hole is very low, some doubts are raised about whether the fluctuations of the black hole can be treated thermodynamically. It is shown that this is not the case: the thermodynamic fluctuations of a black hole are considerably larger than the corresponding quantum fluctuations. Moreover the ratio of the mean square thermodynamic fluctuation to the corresponding quantum fluctuation can be interpreted as a number of the effective constituents of a black hole.

  9. A Note on Black Hole Temperature and Entropy

    E-Print Network [OSTI]

    P. R. Silva

    2006-05-09T23:59:59.000Z

    We propose intuitive derivations of the Hawking temperature and the Bekenstein-Hawking entropy of a Schwarzschild black hole.

  10. Black holes in Born-Infeld extended new massive gravity

    SciTech Connect (OSTI)

    Ghodsi, Ahmad; Yekta, Davood Mahdavian [Department of Physics, Ferdowsi University of Mashhad, P.O. Box 1436, Mashhad (Iran, Islamic Republic of)

    2011-05-15T23:59:59.000Z

    In this paper we find different types of black holes for the Born-Infeld extended new massive gravity. Our solutions include (un)charged warped (anti-)de Sitter black holes for four and six derivative expanded action. We also look at the black holes in unexpanded Born-Infeld action. In each case we calculate the entropy, angular momentum and mass of the black holes. We also find the central charges for the conformal field theory duals.

  11. Particles and scalar waves in noncommutative charged black hole spacetime

    E-Print Network [OSTI]

    Bhar, Piyali; Biswas, Ritabrata; Mondal, U F

    2015-01-01T23:59:59.000Z

    In this paper we have discussed geodesics and the motion of test particle in the gravitational field of noncommutative charged black hole spacetime. The motion of massive and massless particle have been discussed seperately. A comparative study of noncommutative charged black hole and usual Reissner-Nordstrom black hole has been done. The study of effective potential has also been included. Finally, we have examined the scattering of scalar waves in noncommutative charged black hole spacetime.

  12. Entropy and Area of Black Holes in Loop Quantum Gravity

    E-Print Network [OSTI]

    I. B. Khriplovich

    2002-03-31T23:59:59.000Z

    Simple arguments related to the entropy of black holes strongly constrain the spectrum of the area operator for a Schwarzschild black hole in loop quantum gravity. In particular, this spectrum is fixed completely by the assumption that the black hole entropy is maximum. Within the approach discussed, one arrives in loop quantum gravity at a quantization rule with integer quantum numbers $n$ for the entropy and area of a black hole.

  13. lung cancer smoke-free 6 One man's

    E-Print Network [OSTI]

    Roy, Subrata

    Fighting lung cancer Living smoke-free 6 One man's mission85 #12;Cure is the newsletter for the University of Florida Shands Cancer Center, home to cancer care and research for the Southeast's most? For more information about care and services offered at the UF Shands Cancer Center, call 352

  14. Modifications of lung clearance mechanisms by acute influenza A infection

    SciTech Connect (OSTI)

    Levandowski, R.A.; Gerrity, T.R.; Garrard, C.S.

    1985-10-01T23:59:59.000Z

    Four volunteers with naturally acquired, culture-proved influenza A infection inhaled a radiolabeled aerosol to permit investigation of lung mucociliary clearance mechanisms during and after symptomatic illness. Mucus transport in the trachea was undetectable when monitored with an external multidetector probe within 48 hours of the onset of the illness, but was found at a normal velocity by 1 week in three of the four subjects. In two volunteers who coughed 23 to 48 times during the 4.5-hour observation period, whole lung clearance was as fast within the first 48 hours of illness as during health 3 months later in spite of the absence of measurable tracheal mucus transport. Conversely, in spite of the return 1 week later of mucus transport at velocities expected in the trachea, whole lung clearance for the 4.5-hour period was slowed in two volunteers who coughed less than once an hour. The data offer evidence that cough is important in maintaining lung clearance for at least several days after symptomatic influenza A infection when other mechanisms that depend on ciliary function are severely deficient.

  15. Emission of scalar particles from cylindrical black holes

    E-Print Network [OSTI]

    H. Gohar; K. Saifullah

    2011-09-27T23:59:59.000Z

    We study quantum tunneling of scalar particles from black strings. For this purpose we apply WKB approximation and Hamilton-Jacobi method to solve the Klein-Gordon equation for outgoing trajectories. We find the tunneling probability of outgoing charged and uncharged scalars from the event horizon of black strings, and hence the Hawking temperature for these black configurations.

  16. Are black holes with hair a normal state of matter?

    SciTech Connect (OSTI)

    Nieuwenhuizen, Th. M. [Institute for Theoretical Physics, Science Park 904, P. O. Box 94485, 1090 GL Amsterdam (Netherlands)

    2011-03-28T23:59:59.000Z

    Recent observations put forward that quasars are black holes with a magnetic dipole moment and no event horizon. To model hairy black holes a quantum field for hydrogen is considered in curved space, coupled to the scalar curvature. An exact, regular solution for the interior metric occurs for supermassive black holes. The equation of state is p = -{rho}c{sup 2}/3.

  17. A Link Between Black Holes and the Golden Ratio

    E-Print Network [OSTI]

    J. A. Nieto

    2011-06-02T23:59:59.000Z

    We consider a variational formalism to describe black holes solution in higher dimensions. Our procedure clarifies the arbitrariness of the radius parameter and, in particular, the meaning of the event horizon of a black hole. Moreover, our formalism enables us to find a surprising link between black holes and the golden ratio.

  18. Location and Geology Fig 1. The Macasty black shale

    E-Print Network [OSTI]

    , Quebec, is organic-rich black shale and hosting oil and gas. It is equivalent to the Ithaca shaleLocation and Geology Fig 1. The Macasty black shale in the Anticosti Island in the Gulf of St. d13C for calcite disseminated in the black shale range from 2.6o to 2.8 / The values are lower

  19. T-534: Vulnerability in the PDF distiller of the BlackBerry Attachment Service for the BlackBerry Enterprise Server

    Broader source: Energy.gov [DOE]

    BlackBerry advisory describes a security issue that the BlackBerry Attachment Service component of the BlackBerry Enterprise Server is susceptible to. The issue relates to a known vulnerability in the PDF distiller component of the BlackBerry Attachment Service that affects how the BlackBerry Attachment Service processes PDF files.

  20. Black Holes and Sub-millimeter Dimensions

    E-Print Network [OSTI]

    Argyres, Philip C; March-Russell, John David; Argyres, Philip C.; Dimopoulos, Savas; March-Russell, John

    1998-01-01T23:59:59.000Z

    Recently, a new framework for solving the hierarchy problem was proposed which does not rely on low energy supersymmetry or technicolor. The fundamental Planck mass is at a TeV and the observed weakness of gravity at long distances is due the existence of new sub-millimeter spatial dimensions. In this letter, we study how the properties of black holes are altered in these theories. Small black holes---with Schwarzschild radii smaller than the size of the new spatial dimensions---are quite different. They are bigger, colder, and longer-lived than a usual $(3+1)$-dimensional black hole of the same mass. Furthermore, they primarily decay into harmless bulk graviton modes rather than standard-model degrees of freedom. We discuss the interplay of our scenario with the holographic principle. Our results also have implications for the bounds on the spectrum of primordial black holes (PBHs) derived from the photo-dissociation of primordial nucleosynthesis products, distortion of the diffuse gamma-ray spectrum, overcl...

  1. Black Holes in Einstein-Aether Theory

    E-Print Network [OSTI]

    Christopher Eling; Ted Jacobson

    2010-03-28T23:59:59.000Z

    We study black hole solutions in general relativity coupled to a unit timelike vector field dubbed the "aether". To be causally isolated a black hole interior must trap matter fields as well as all aether and metric modes. The theory possesses spin-0, spin-1, and spin-2 modes whose speeds depend on four coupling coefficients. We find that the full three-parameter family of local spherically symmetric static solutions is always regular at a metric horizon, but only a two-parameter subset is regular at a spin-0 horizon. Asymptotic flatness imposes another condition, leaving a one-parameter family of regular black holes. These solutions are compared to the Schwarzschild solution using numerical integration for a special class of coupling coefficients. They are very close to Schwarzschild outside the horizon for a wide range of couplings, and have a spacelike singularity inside, but differ inside quantitatively. Some quantities constructed from the metric and aether oscillate in the interior as the singularity is approached. The aether is at rest at spatial infinity and flows into the black hole, but differs significantly from the the 4-velocity of freely-falling geodesics.

  2. Geodesic study of a charged black hole

    E-Print Network [OSTI]

    Mehedi Kalam; Nur Farhad; Sk. Monowar Hossein

    2013-03-17T23:59:59.000Z

    The behavior of the timelike and null geodesics of charged E. Ay$\\acute{o}$n-Beato and A. Garcia (ABG) black hole are investigated. For circular and radial geodesics, we investigate all the possible motions by plotting the effective potentials for different parameters. In conclusion, we have shown that there is no phenomenon of \\textit{superradiance} in this case.

  3. Limits on New Physics from Black Holes

    E-Print Network [OSTI]

    Clifford Cheung; Stefan Leichenauer

    2014-08-02T23:59:59.000Z

    Black holes emit high energy particles which induce a finite density potential for any scalar field $\\phi$ coupling to the emitted quanta. Due to energetic considerations, $\\phi$ evolves locally to minimize the effective masses of the outgoing states. In theories where $\\phi$ resides at a metastable minimum, this effect can drive $\\phi$ over its potential barrier and classically catalyze the decay of the vacuum. Because this is not a tunneling process, the decay rate is not exponentially suppressed and a single black hole in our past light cone may be sufficient to activate the decay. Moreover, decaying black holes radiate at ever higher temperatures, so they eventually probe the full spectrum of particles coupling to $\\phi$. We present a detailed analysis of vacuum decay catalyzed by a single particle, as well as by a black hole. The former is possible provided large couplings or a weak potential barrier. In contrast, the latter occurs much more easily and places new stringent limits on theories with hierarchical spectra. Finally, we comment on how these constraints apply to the standard model and its extensions, e.g. metastable supersymmetry breaking.

  4. Pulsed combustion process for black liquor gasification

    SciTech Connect (OSTI)

    Durai-Swamy, K.; Mansour, M.N.; Warren, D.W.

    1991-02-01T23:59:59.000Z

    The objective of this project is to test an energy efficient, innovative black liquor recovery system on an industrial scale. In the MTCI recovery process, black liquor is sprayed directly onto a bed of sodium carbonate solids which is fluidized by steam. Direct contact of the black liquor with hot bed solids promotes high rates of heating and pyrolysis. Residual carbon, which forms as a deposit on the particle surface, is then gasified by reaction with steam. Heat is supplied from pulse combustor resonance tubes which are immersed within the fluid bed. A portion of the gasifier product gas is returned to the pulse combustors to provide the energy requirements of the reactor. Oxidized sulfur species are partially reduced by reaction with the gasifier products, principally carbon monoxide and hydrogen. The reduced sulfur decomposed to solid sodium carbonate and gaseous hydrogen sulfide (H{sub 2}S). Sodium values are recovered by discharging a dry sodium carbonate product from the gasifier. MTCI's indirectly heated gasification technology for black liquor recovery also relies on the scrubbing of H{sub 2}S for product gases to regenerate green liquor for reuse in the mill circuit. Due to concerns relative to the efficiency of sulfur recovery in the MTCI integrated process, an experimental investigation was undertaken to establish performance and design data for this portion of the system.

  5. Schwarzschild black hole in dark energy background

    E-Print Network [OSTI]

    Ngangbam Ishwarchandra; Ng. Ibohal; K. Yugindro Singh

    2014-09-27T23:59:59.000Z

    In this paper we present an exact solution of Einstein's field equations describing the Schwarzschild black hole in dark energy background. It is also regarded as an embedded solution that the Schwarzschild black hole is embedded into the dark energy space producing Schwarzschild-dark energy black hole. It is found that the space-time geometry of Schwarzschild-dark energy solution is non-vacuum Petrov type $D$ in the classification of space-times. We study the energy conditions (like weak, strong and dominant conditions) for the energy-momentum tensor of the Schwarzschild-dark energy solution. We also find that the energy-momentum tensor of the Schwarzschild-dark energy solution violates the strong energy condition due to the negative pressure leading to a repulsive gravitational force of the matter field in the space-time. It is shown that the time-like vector field for an observer in the Schwarzschild-dark energy space is expanding, accelerating, shearing and non-rotating. We investigate the surface gravity and the area of the horizons for the Schwarzschild-dark energy black hole.

  6. 4, 871891, 2007 Mobility of black

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    BGD 4, 871­891, 2007 Mobility of black carbon J. Leifeld et al. Title Page Abstract Introduction Discussion EGU Biogeosciences Discuss., 4, 871­891, 2007 www.biogeosciences-discuss.net/4/871/2007/ © Author ­ Published: 23 March 2007 Correspondence to: J. Leifeld (jens.leifeld@art.admin.ch) 871 #12;BGD 4, 871

  7. Supermassive Black Hole Binaries: The Search Continues

    E-Print Network [OSTI]

    Tamara Bogdanovic

    2014-06-19T23:59:59.000Z

    Gravitationally bound supermassive black hole binaries (SBHBs) are thought to be a natural product of galactic mergers and growth of the large scale structure in the universe. They however remain observationally elusive, thus raising a question about characteristic observational signatures associated with these systems. In this conference proceeding I discuss current theoretical understanding and latest advances and prospects in observational searches for SBHBs.

  8. Typechecking Polymorphism in Emerald Andrew P. Black

    E-Print Network [OSTI]

    Black, Andrew P.

    Typechecking Polymorphism in Emerald Andrew P. Black Digital Equipment Corporation Norman, distributed programming. c Digital Equipment Corporation and Norman Hutchinson 1991. All rights reserved by the National Science Foundation under Grant CCR-8701516. Norman Hutchinson was with the University of Arizona

  9. Six Sigma Black Belts Fight For Quality

    E-Print Network [OSTI]

    Vardeman, Stephen B.

    Six Sigma Black Belts Fight For Quality Ron Scott Ross Finnestad Rodney Kalsow IE 361 mini-paper 9/22/00 #12;Six Sigma is a breakthrough management strategy that is revolutionizing the world's top corporations. So what is Six Sigma? "It is a business process that allows companies to drastically improve

  10. Brief review on higher spin black holes

    E-Print Network [OSTI]

    Alfredo Perez; David Tempo; Ricardo Troncoso

    2014-05-12T23:59:59.000Z

    We review some relevant results in the context of higher spin black holes in three-dimensional spacetimes, focusing on their asymptotic behaviour and thermodynamic properties. For simplicity, we mainly discuss the case of gravity nonminimally coupled to spin-3 fields, being nonperturbatively described by a Chern-Simons theory of two independent sl(3,R) gauge fields. Since the analysis is particularly transparent in the Hamiltonian formalism, we provide a concise discussion of their basic aspects in this context; and as a warming up exercise, we briefly analyze the asymptotic behaviour of pure gravity, as well as the BTZ black hole and its thermodynamics, exclusively in terms of gauge fields. The discussion is then extended to the case of black holes endowed with higher spin fields, briefly signaling the agreements and discrepancies found through different approaches. We conclude explaining how the puzzles become resolved once the fall off of the fields is precisely specified and extended to include chemical potentials, in a way that it is compatible with the asymptotic symmetries. Hence, the global charges become completely identified in an unambiguous way, so that different sets of asymptotic conditions turn out to contain inequivalent classes of black hole solutions being characterized by a different set of global charges.

  11. Repackaging SRS Black Box TRU Waste

    SciTech Connect (OSTI)

    Swale, D. J.; Stone, K.A.; Milner, T. N.

    2006-01-09T23:59:59.000Z

    Historically, large items of TRU Waste, which were too large to be packaged in drums for disposal have been packaged in various sizes of custom made plywood boxes at the Savannah River Site (SRS), for many years. These boxes were subsequently packaged into large steel ''Black Boxes'' for storage at SRS, pending availability of Characterization and Certification capability, to facilitate disposal of larger items of TRU Waste. There are approximately 107 Black Boxes in inventory at SRS, each measuring some 18' x 12' x 7', and weighing up to 45,000 lbs. These Black Boxes have been stored since the early 1980s. The project to repackage this waste into Standard Large Boxes (SLBs), Standard Waste Boxes (SWB) and Ten Drum Overpacks (TDOP), for subsequent characterization and WIPP disposal, commenced in FY04. To date, 10 Black Boxes have been repackaged, resulting in 40 SLB-2's, and 37 B25 overpack boxes, these B25's will be overpacked in SLB-2's prior to shipping to WIPP. This paper will describe experience to date from this project.

  12. Ecology, Silviculture, and Management of Black Hills

    E-Print Network [OSTI]

    Fried, Jeremy S.

    . Battaglia United States Department of Agriculture Forest Service Rocky Mountain Research Station General Technical Report RMRS-GTR-97 September 2002 #12;Shepperd, Wayne D.; Battaglia, Michael A. 2002. Ecology in Arizona, and the Black Hills of South Dakota. Michael A. Battaglia is a research associate with METI

  13. Geodesics and Geodesic Deviation in static Charged Black Holes

    E-Print Network [OSTI]

    Ragab M. Gad

    2010-03-03T23:59:59.000Z

    The radial motion along null geodesics in static charged black hole space-times, in particular, the Reissner-Nordstr\\"om and stringy charged black holes are studied. We analyzed the properties of the effective potential. The circular photon orbits in these space-times are investigated. We found that the radius of circular photon orbits in both charged black holes are different and differ from that given in Schwarzschild space-time. We studied the physical effects of the gravitational field between two test particles in stringy charged black hole and compared the results with that given in Schwarzschild and Reissner-Nordstr\\"om black holes.

  14. Entropy spectra of single horizon black holes in two dimensions

    E-Print Network [OSTI]

    A. Lopez-Ortega

    2011-12-29T23:59:59.000Z

    The Hod conjecture proposes that the asymptotic quasinormal frequencies determine the entropy quantum of a black hole. Considering the Maggiore modification of this conjecture we calculate the entropy spectra of general, single horizon, asymptotically flat black holes in two-dimensional dilaton gravity. We also compute the entropy quanta of the two-dimensional Witten and AdS(2) black holes. Using the results for the entropy quanta of these two-dimensional black holes we discuss whether the produced values are generic. Finally we extend the results on the entropy spectra of other black holes.

  15. Quantum spectrum and statistic entropy of black hole

    E-Print Network [OSTI]

    Zhao Ren; Li Huaifan; Zhang Shengli

    2006-10-16T23:59:59.000Z

    Taking the horizon surface of the black hole as a compact membrane and solving the oscillation equation of this membrane by Klein-Gordon equation, we derive the frequencies of oscillation modes of the horizon surface, which are proportional to the radiation temperature of the black hole. However, the frequencies of oscillation modes are not equidistant. Using the distribution of obtained frequencies of oscillation mode we compute the statistic entropy of the black hole and obtain that the statistic entropy of the black hole is proportional to the area of the horizon. Therefore, it is proven that the quantum statistic entropy of the black hole is consistent with Bekenstein-Hawking entropy.

  16. Disability rights in dialogue with clinical genetics conference, May 31 to June 2, 1996

    SciTech Connect (OSTI)

    NONE

    1996-12-31T23:59:59.000Z

    The issue of prenatal diagnosis and selective abortion has been hotly debated in the medical, genetic counselling, feminist, parents, disability rights and bio-ethics literature, each of the various positions critiquing each other. People from the disability rights community in particular have began to articulate a critical view of the practice of widespread prenatal diagnosis with intent to abort because the pregnancy might result in a child with a disability. Unfortunately, people from the various disciplines and perspectives, such as bioethics, disability rights, feminism and so forth, by and large, have tended only to write for themselves and their colleagues. Few people have crossed disciplines to try to talk to people with other views. The rapid advances of genome research have continued to produce new prenatal tests, raising many complex ethical questions regarding the applications of prenatal testing. But the widely disparate positions of the various factions has made it difficult to move toward formulation of public policy change necessary to encompass these new genetic technologies. Genetic counselling is in the front lines of the controversial social and ethical issues arising from prenatal diagnosis, in its interface between medical science and the consumer of services. The primary intent of the conference was to invite and facilitate productive dialogue between individuals and groups of people who have traditionally not interacted as a result of their disparate views on these issues and to learn from this process, emphasizing the involvement of people with disabilities and people who work in clinical genetics.

  17. Fate of black branes in Einstein-Gauss-Bonnet gravity

    SciTech Connect (OSTI)

    Suranyi, P.; Wijewardhana, L. C. R. [Department of Physics, University of Cincinnati, Cincinnati, Ohio, 45221-0011 (United States); Vaz, C. [Department of Physics, University of Cincinnati, Cincinnati, Ohio, 45221-0011 (United States); RWC, University of Cincinnati, Cincinnati, Ohio, 45221 (United States)

    2009-06-15T23:59:59.000Z

    Black branes are studied in Einstein-Gauss-Bonnet gravity. Evaporation drives black branes toward one of two singularities depending on the sign of {alpha}, the Gauss-Bonnet coupling. For positive {alpha} and sufficiently large ratio {radical}({alpha})/L, where L/2{pi} is the radius of compactification, black branes avoid the Gregory-Laflamme (GL) instability before reaching a critical state. No black branes with the radius of horizon smaller than the critical value can exist. Approaching the critical state branes have a nonzero Hawking temperature. For negative {alpha} all black branes encounter the GL instability. No black branes may exist outside of the interval of the critical values 0{<=}{beta}<3, where {beta}=1-8{alpha}/r{sub h}{sup 2} and r{sub h} is the radius of horizon of the black brane. The first order phase transition line of GL transitions ends in a second order phase transition point at {beta}=0.

  18. Acoustic clouds: standing sound waves around a black hole analogue

    E-Print Network [OSTI]

    Carolina L. Benone; Luis C. B. Crispino; Carlos Herdeiro; Eugen Radu

    2015-01-28T23:59:59.000Z

    Under certain conditions sound waves in fluids experience an acoustic horizon with analogue properties to those of a black hole event horizon. In particular, a draining bathtub-like model can give rise to a rotating acoustic horizon and hence a rotating black hole (acoustic) analogue. We show that sound waves, when enclosed in a cylindrical cavity, can form stationary waves around such rotating acoustic black holes. These acoustic perturbations display similar properties to the scalar clouds that have been studied around Kerr and Kerr-Newman black holes; thus they are dubbed acoustic clouds. We make the comparison between scalar clouds around Kerr black holes and acoustic clouds around the draining bathtub explicit by studying also the properties of scalar clouds around Kerr black holes enclosed in a cavity. Acoustic clouds suggest the possibility of testing, experimentally, the existence and properties of black hole clouds, using analog models.

  19. Acoustic clouds: standing sound waves around a black hole analogue

    E-Print Network [OSTI]

    Benone, Carolina L; Herdeiro, Carlos; Radu, Eugen

    2014-01-01T23:59:59.000Z

    Under certain conditions sound waves in fluids experience an acoustic horizon with analogue properties to those of a black hole event horizon. In particular, a draining bathtub-like model can give rise to a rotating acoustic horizon and hence a rotating black hole (acoustic) analogue. We show that sound waves, when enclosed in a cylindrical cavity, can form stationary waves around such rotating acoustic black holes. These acoustic perturbations display similar properties to the scalar clouds that have been studied around Kerr and Kerr-Newman black holes; thus they are dubbed acoustic clouds. We make the comparison between scalar clouds around Kerr black holes and acoustic clouds around the draining bathtub explicit by studying also the properties of scalar clouds around Kerr black holes enclosed in a cavity. Acoustic clouds suggest the possibility of testing, experimentally, the existence and properties of black hole clouds, using analog models.

  20. Policy for University Accommodations of Persons with Disabilities Page 1 of 6 Virginia Polytechnic Institute and State University No. 4075 Rev.: 4

    E-Print Network [OSTI]

    Buehrer, R. Michael

    Policy for University Accommodations of Persons with Disabilities Page 1 of 6 Virginia Polytechnic Institute and State University No. 4075 Rev.: 4 Policy and Procedures Date: June 30, 2010 __________________________________________________________________________________ Subject: Policy for University Accommodations of Persons with Disabilities

  1. POLICY FOR DISABLED & VIETNAM-ERA VETERANS Clemson University prohibits discrimination against any employee or applicant for

    E-Print Network [OSTI]

    Bolding, M. Chad

    POLICY FOR DISABLED & VIETNAM-ERA VETERANS Clemson University prohibits discrimination against any be in violation of the University's policy. Clemson University will treat qualified disabled veterans and veterans a policy related question should contact the Office of Access and Equity, 110 Holtzendorff Hall. Phone

  2. Health, Counselling and Disability Services (HCDS) 146 Stuart Street (613) 533-2506 www.queensu.ca/hcds

    E-Print Network [OSTI]

    Abolmaesumi, Purang

    Health, Counselling and Disability Services (HCDS) 146 Stuart Street (613) 533-2506 www For in Students: · Listlessness, lack of energy, or apparent loss of interest · Unusual or bizarre behavior, sexual or cultural identity #12;Health, Counselling and Disability Services (HCDS) 146 Stuart Street (613

  3. Lung Tumor Radiofrequency Ablation: Where Do We Stand?

    SciTech Connect (OSTI)

    Baere, Thierry de, E-mail: debaere@igr.fr [Institut Gustave Roussy, Department of Interventional Radiology (France)

    2011-04-15T23:59:59.000Z

    Today, radiofrequency ablation (RFA) of primary and metastatic lung tumor is increasingly used. Because RFA is most often used with curative intent, preablation workup must be a preoperative workup. General anesthesia provides higher feasibility than conscious sedation. The electrode positioning must be performed under computed tomography for sake of accuracy. The delivery of RFA must be adapted to tumor location, with different impedances used when treating tumors with or without pleural contact. The estimated rate of incomplete local treatment at 18 months was 7% (95% confidence interval, 3-14) per tumor, with incomplete treatment depicted at 4 months (n = 1), 6 months (n = 2), 9 months (n = 2), and 12 months (n = 2). Overall survival and lung disease-free survival at 18 months were, respectively, 71 and 34%. Size is a key point for tumor selection because large size is predictive of incomplete local treatment and poor survival. The ratio of ablation volume relative to tumor volume is predictive of complete ablation. Follow-up computed tomography that relies on the size of the ablation zone demonstrates the presence of incomplete ablation. Positron emission tomography might be an interesting option. Chest tube placement for pneumothorax is reported in 8 to 12%. Alveolar hemorrhage and postprocedure hemoptysis occurred in approximately 10% of procedures and rarely required specific treatment. Death was mostly related to single-lung patients and hilar tumors. No modification of forced expiratory volume in the first second between pre- and post-RFA at 2 months was found. RFA in the lung provides a high local efficacy rate. The use of RFA as a palliative tool in combination with chemotherapy remains to be explored.

  4. Outcome after Radiofrequency Ablation of Sarcoma Lung Metastases

    SciTech Connect (OSTI)

    Koelblinger, Claus, E-mail: claus.koelblinger@bhs.at [KH Barmherzige Schwestern Ried, Department of Radiology (Austria); Strauss, Sandra, E-mail: s.strauss@ucl.ac.uk [UCL and UCLH, Department of Medical Oncology (United Kingdom); Gillams, Alice, E-mail: alliesorting@gmail.com [The London Clinic, Department of Radiology (United Kingdom)

    2013-05-14T23:59:59.000Z

    PurposeResection is the mainstay of management in patients with sarcoma lung metastases, but there is a limit to how many resections can be performed. Some patients with inoperable disease have small-volume lung metastases that are amenable to thermal ablation. We report our results after radiofrequency ablation (RFA).MethodsThis is a retrospective study of patients treated from 2007 to 2012 in whom the intention was to treat all sites of disease and who had a minimum CT follow-up of 4months. Treatment was performed under general anesthesia/conscious sedation using cool-tip RFA. Follow-up CT scans were analyzed for local control. Primary tumor type, location, grade, disease-free interval, prior resection/chemotherapy, number and size of lung tumors, uni- or bilateral disease, complications, and overall and progression-free survival were recorded.ResultsTwenty-two patients [15 women; median age 48 (range 1078) years] with 55 lung metastases were treated in 30 sessions. Mean and median tumor size and initial number were 0.9cm and 0.7 (range 0.52) cm, and 2.5 and 1 (17) respectively. Median CT and clinical follow-up were 12 (454) and 20 (863) months, respectively. Primary local control rate was 52 of 55 (95%). There were 2 of 30 (6.6%) Common Terminology Criteria grade 3 complications with no long-term sequelae. Mean (median not reached) and 2- and 3-year overall survival were 51months, and 94 and 85%. Median and 1- and 2-year progression-free survival were 12months, and 53 and 23%. Prior disease-free interval was the only significant factor to affect overall survival.ConclusionRFA is a safe and effective treatment for patients with small-volume sarcoma metastases.

  5. Perfusion lung scan: an aid in detection of lymphangitic carcinomatosis

    SciTech Connect (OSTI)

    Bates, S.E.; Tranum, B.L.

    1982-07-15T23:59:59.000Z

    Lymphangitic carcinomatosis is usually a late manifestation of metastatic disease. The patient usually presents with cough or dyspnea, and the chest radiograph is often nondiagnostic. Two patients are presented who developed symptoms while on adjuvant chemotherapy. Both had abnormal perfusion lung scans. One had matching ventilation defects; the other a normal ventilation study. Biopsy revealed metastatic carcinoma; in one case tumor was seen in both the pulmonary lymphatics and arterioles; in technique which can speed diagnosis and institution of therapy in lymphangitic carcinomatosis.

  6. Rholography, Black Holes and Scherk-Schwarz

    E-Print Network [OSTI]

    Nava Gaddam; Alessandra Gnecchi; Stefan Vandoren; Oscar Varela

    2014-12-23T23:59:59.000Z

    We present both the macroscopic and microscopic description of a class of near-extremal asymptotically flat black hole solutions in four (or five) dimensional gauged supergravity with R-symmetry gaugings obtained from Scherk-Schwarz reductions on a circle. The entropy of these black holes is counted holographically by the well known MSW (or D1/D5) system, with certain twisted boundary conditions labeled by a twist parameter \\rho. We find that the corresponding (0,4) (or (4,4)) superconformal algebras are exactly those studied by Schwimmer and Seiberg, using a twist on the outer automorphism group. The interplay between R-symmetries, \\rho-algebras and holography leads us to name our construction "Rholography".

  7. Black Hole Entropy and Induced Gravity

    E-Print Network [OSTI]

    Ted Jacobson

    1994-04-19T23:59:59.000Z

    In this short essay we review the arguments showing that black hole entropy is, at least in part, ``entanglement entropy", i.e., missing information contained in correlations between quantum field fluctuations inside and outside the event horizon. Although the entanglement entropy depends upon the matter field content of the theory, it turns out that so does the Bekenstein-Hawking entropy $A/4\\hbar G_{ren}$, in precisely the same way, because the effective gravitational constant $G_{ren}$ is renormalized by the very same quantum fluctuations. It appears most satisfactory if the entire gravitational action is ``induced", in the manner suggested by Sakharov, since then the black hole entropy is purebred entanglement entropy, rather than being hybrid with bare gravitational entropy (whatever that might be.)

  8. Geometric description of BTZ black holes thermodynamics

    E-Print Network [OSTI]

    Hernando Quevedo; Alberto Sanchez

    2008-11-15T23:59:59.000Z

    We study the properties of the space of thermodynamic equilibrium states of the Ba\\~nados-Teitelboim-Zanelli (BTZ) black hole in (2+1)-gravity. We use the formalism of geometrothermodynamics to introduce in the space of equilibrium states a $2-$dimensional thermodynamic metric whose curvature is non-vanishing, indicating the presence of thermodynamic interaction, and free of singularities, indicating the absence of phase transitions. Similar results are obtained for generalizations of the BTZ black hole which include a Chern-Simons term and a dilatonic field. Small logarithmic corrections of the entropy turn out to be represented by small corrections of the thermodynamic curvature, reinforcing the idea that thermodynamic curvature is a measure of thermodynamic interaction.

  9. Quantized black holes, their spectrum and radiation

    SciTech Connect (OSTI)

    Khriplovich, I. B. [Budker Institute of Nuclear Physics (Russian Federation)], E-mail: khriplovich@inp.nsk.su

    2008-04-15T23:59:59.000Z

    Under quite natural general assumptions, the following results are obtained. The maximum entropy of a quantized surface is demonstrated to be proportional to the surface area in the classical limit. The general structure of the horizon spectrum is found. In the special case of loop quantum gravity, the value of the Barbero-Immirzi parameter is found. The discrete spectrum of thermal radiation of a black hole fits the Wien profile. The natural widths of the lines are much smaller than the distances between them. The total intensity of the thermal radiation is estimated. If the density of quantized primordial black holes is close to the present upper limit on the dark-matter density in our Solar system, the sensitivity of modern detectors is close to that necessary for detecting this radiation.

  10. Tissue Heterogeneity in IMRT Dose Calculation for Lung Cancer

    SciTech Connect (OSTI)

    Pasciuti, Katia, E-mail: ka.pasciuti@libero.i [Laboratory of Medical Physics, Istituto Regina Elena, Roma (Italy); Iaccarino, Giuseppe; Strigari, Lidia [Laboratory of Medical Physics, Istituto Regina Elena, Roma (Italy); Malatesta, Tiziana [Medical Physics Department, S. Giovanni Calibita, Fatebenefratelli Hospital, Roma (Italy); Benassi, Marcello; Di Nallo, Anna Maria [Laboratory of Medical Physics, Istituto Regina Elena, Roma (Italy); Mirri, Alessandra; Pinzi, Valentina [Division of Radiotherapy, Istituto Regina Elena, Roma (Italy); Landoni, Valeria [Laboratory of Medical Physics, Istituto Regina Elena, Roma (Italy)

    2011-07-01T23:59:59.000Z

    The aim of this study was to evaluate the differences in accuracy of dose calculation between 3 commonly used algorithms, the Pencil Beam algorithm (PB), the Anisotropic Analytical Algorithm (AAA), and the Collapsed Cone Convolution Superposition (CCCS) for intensity-modulated radiation therapy (IMRT). The 2D dose distributions obtained with the 3 algorithms were compared on each CT slice pixel by pixel, using the MATLAB code (The MathWorks, Natick, MA) and the agreement was assessed with the {gamma} function. The effect of the differences on dose-volume histograms (DVHs), tumor control, and normal tissue complication probability (TCP and NTCP) were also evaluated, and its significance was quantified by using a nonparametric test. In general PB generates regions of over-dosage both in the lung and in the tumor area. These differences are not always in DVH of the lung, although the Wilcoxon test indicated significant differences in 2 of 4 patients. Disagreement in the lung region was also found when the {Gamma} analysis was performed. The effect on TCP is less important than for NTCP because of the slope of the curve at the level of the dose of interest. The effect of dose calculation inaccuracy is patient-dependent and strongly related to beam geometry and to the localization of the tumor. When multiple intensity-modulated beams are used, the effect of the presence of the heterogeneity on dose distribution may not always be easily predictable.

  11. Economic aspects of black bases in Texas

    E-Print Network [OSTI]

    Schoen, Wayne Ayron

    1976-01-01T23:59:59.000Z

    the f easibility of using sand-asphalt stabilized base courses. Gregg reported that the sand-asphalt bases investigated in the field studies performed well under moving traffic. Moduli of resilient deformation of the bitumen-sand mixtures were... Ayron Schoen, B. S. , Texas ARK University Chairman of Advisory Committee: Dr. Jon A. Epps Although black base construction has gained increasing popularity in recent years, the rising costs of asphalt and asphalt materials have demanded that more...

  12. The high energy emission from black holes

    E-Print Network [OSTI]

    M. D. Caballero-Garcia; J. M. Miller; E. Kuulkers

    2007-11-06T23:59:59.000Z

    The origin of the high energy emission (X-rays and gamma-rays) from black holes is still a matter of debate. We present new evidence that hard X-ray emission in the low/hard state may not be dominated by thermal Comptonization. We present an alternative scenario for the origin of the high energy emission that is well suited to explain the high energy emission from GRO J1655-40.

  13. Refined Black Hole Ensembles and Topological Strings

    E-Print Network [OSTI]

    Mina Aganagic; Kevin Schaeffer

    2012-10-05T23:59:59.000Z

    We formulate a refined version of the Ooguri-Strominger-Vafa (OSV) conjecture. The OSV conjecture that Z_{BH} = |Z_{top}|^2 relates the BPS black hole partition function to the topological string partition function Z_{top}. In the refined conjecture, Z_{BH} is the partition function of BPS black holes counted with spin, or more precisely the protected spin character. Z_{top} becomes the partition function of the refined topological string, which is itself an index. Both the original and the refined conjecture are examples of large N duality in the 't Hooft sense. The refined conjecture applies to non-compact Calabi-Yau manifolds only, so the black holes are really BPS particles with large entropy, of order N^2. The refined OSV conjecture states that the refined BPS partition function has a large N dual which is captured by the refined topological string. We provide evidence that the conjecture holds by studying local Calabi-Yau threefolds consisting of line bundles over a genus g Riemann surface. We show that the refined topological string partition function on these geometries is computed by a two-dimensional TQFT. We also study the refined black hole partition function arising from N D4 branes on the Calabi-Yau, and argue that it reduces to a (q,t)-deformed version of two-dimensional SU(N) Yang-Mills. Finally, we show that in the large N limit this theory factorizes to the square of the refined topological string in accordance with the refined OSV conjecture.

  14. Density matrix of black hole radiation

    E-Print Network [OSTI]

    Lasma Alberte; Ram Brustein; Andrei Khmelnitsky; A. J. M. Medved

    2015-02-09T23:59:59.000Z

    Hawking's model of black hole evaporation is not unitary and leads to a mixed density matrix for the emitted radiation, while the Page model describes a unitary evaporation process in which the density matrix evolves from an almost thermal state to a pure state. We compare a recently proposed model of semiclassical black hole evaporation to the two established models. In particular, we study the density matrix of the outgoing radiation and determine how the magnitude of the off-diagonal corrections differs for the three frameworks. For Hawking's model, we find power-law corrections to the two-point functions that induce exponentially suppressed corrections to the off-diagonal elements of the full density matrix. This verifies that the Hawking result is correct to all orders in perturbation theory and also allows one to express the full density matrix in terms of the single-particle density matrix. We then consider the semiclassical theory for which the corrections, being non-perturbative from an effective field-theory perspective, are much less suppressed and grow monotonically in time. In this case, the R\\'enyi entropy for the outgoing radiation is shown to grow linearly at early times; but this growth slows down and the entropy eventually starts to decrease at the Page time. In addition to comparing models, we emphasize the distinction between the state of the radiation emitted from a black hole, which is highly quantum, and that of the radiation emitted from a typical classical black body at the same temperature.

  15. Entanglement from thermal black body radiation

    E-Print Network [OSTI]

    Daniel Braun

    2005-09-06T23:59:59.000Z

    Two non--interacting quantum systems which couple to a common environment with many degrees of freedom initially in thermal equilibrium can become entangled due to the indirect interaction mediated through this heat bath. I examine here the dynamics of reservoir induced entanglement for a heat bath consisting of a thermal electro--magnetic radiation field, such as black body radiation or the cosmic microwave background, and show how the effect can be understood as result of an effective induced interaction.

  16. Comparing quantum black holes and naked singularities

    E-Print Network [OSTI]

    T. P. Singh

    2000-12-21T23:59:59.000Z

    There are models of gravitational collapse in classical general relativity which admit the formation of naked singularities as well as black holes. These include fluid models as well as models with scalar fields as matter. Even if fluid models were to be regarded as unphysical in their matter content, the remaining class of models (based on scalar fields) generically admit the formation of visible regions of finite but arbitrarily high curvature. Hence it is of interest to ask, from the point of view of astrophysics, as to what a stellar collapse leading to a naked singularity (or to a visible region of very high curvature) will look like, to a far away observer. The emission of energy during such a process may be divided into three phases - (i) the classical phase, during which matter and gravity can both be treated according to the laws of classical physics, (ii) the semiclassical phase, when gravity is treated classically but matter behaves as a quantum field, and (iii) the quantum gravitational phase. In this review, we first give a summary of the status of naked singularities in classical relativity, and then report some recent results comparing the semiclassical phase of black holes with the semiclassical phase of spherical collapse leading to a naked singularity. In particular, we ask how the quantum particle creation during the collapse leading to a naked singularity compares with the Hawking radiation from a star collapsing to form a black hole. It turns out that there is a fundamental difference between the two cases. A spherical naked star emits only about one Planck energy during its semiclassical phase, and the further evolution can only be determined by the laws of quantum gravity. This contrasts with the semiclassical evaporation of a black hole.

  17. Electromagnetic wave scattering by Schwarzschild black holes

    E-Print Network [OSTI]

    Lus C. B. Crispino; Sam R. Dolan; Ednilton S. Oliveira

    2009-05-20T23:59:59.000Z

    We analyze the scattering of a planar monochromatic electromagnetic wave incident upon a Schwarzschild black hole. We obtain accurate numerical results from the partial wave method for the electromagnetic scattering cross section, and show that they are in excellent agreement with analytical approximations. The scattering of electromagnetic waves is compared with the scattering of scalar, spinor and gravitational waves. We present a unified picture of the scattering of all massless fields for the first time.

  18. Lowering kraft black liquor viscosity of ultrafiltration

    SciTech Connect (OSTI)

    Hill, M.K.; Violette, D.A.; Woerner, D.L.

    1988-10-01T23:59:59.000Z

    High viscosity is a major factor limiting the percentage total dissolved solids (%TDS) to which kraft black liquor (KBL), a spent pulping liquor, can be concentrated before it is burned to recover its fuel value and its inorganic chemicals. The effect on black liquor viscosity of removing high molecular weight lignin by ultrafiltration of 16% and 24% TDS liquors was studied. Viscosities of ultrafiltration permeates were reduced relative to feed black liquors. When a permeate was concentrated to higher %TDS levels, its viscosity decreased yet further relative to feed samples evaporated to similar solids levels. Retentate viscosity was very high relative to both feed and permeate. Ultrafiltration was carried out at 75/degrees/C using polysulfone membranes in a plate-and-frame or hollow fiber system. Flux rates varied greatly depending upon the specific liquor used. Flux was enhanced by increased temperature and increased linear velocity. The membrane molecular weight cutoff (MWCO) typically used was 50,000; increasing 100,000 or 200,000 did not enhance flux.

  19. In Situ Causticizing for Black Liquor Gasification

    SciTech Connect (OSTI)

    Scott Alan Sinquefield

    2005-10-01T23:59:59.000Z

    Black liquor gasification offers a number of attractive incentives to replace Tomlinson boilers but it also leads to an increase in the causticizing load. Reasons for this have been described in previous reports (FY04 ERC, et.al.). The chemistries have also been covered but will be reviewed here briefly. Experimental results of the causticizing reactions with black liquor are presented here. Results of the modeling work were presented in detail in the Phase 1 report. They are included in Table 2 for comparison but will not be discussed in detail. The causticizing agents were added to black liquor in the ratios shown in Table 1, mixed, and then spray-dried. The mixture ratios (doping levels) reflect amount calculated from the stoichiometry above to achieve specified conversions shown in the table. The solids were sieved to 63-90 microns for use in the entrained flow reactors. The firing conditions are shown in Table 2. Pictures and descriptions of the reactors can be found in the Phase 1 annual report. Following gasification, the solids (char) was collected and analyzed by coulometric titration (for carbonate and total carbon), and by inductively coupled plasma emission spectroscopy (ICP) for a wide array of metals.

  20. Quantization of rotating linear dilaton black holes

    E-Print Network [OSTI]

    I. Sakalli

    2014-06-19T23:59:59.000Z

    In this paper, we firstly prove that the adiabatic invariant quantity, which is commonly used in the literature for quantizing the rotating black holes (BHs) is fallacious. We then show how its corrected form should be. The main purpose of this paper is to study the quantization of 4-dimensional rotating linear dilaton black hole (RLDBH) spacetime describing with an action, which emerges in the Einstein-Maxwell-Dilaton-Axion (EMDA) theory. The RLDBH spacetime has a non-asymptotically flat (NAF) geometry. They reduces to the linear dilaton black hole (LDBH) metric when vanishing its rotation parameter $a$. While studying its scalar perturbations, it is shown that the Schr\\"odinger-like wave equation around the event horizon reduces to a confluent hypergeometric differential equation. Then the associated complex frequencies of the quasinormal modes (QNMs) are computed. By using those QNMs in the true definition of the rotational adiabatic invariant quantity, we obtain the quantum spectra of entropy/area for the RLDBH. It is found out that both spectra are discrete and equidistant. Besides, we reveal that the quantum spectra do not depend on $a$ in spite of the QNMs are modulated by it.

  1. Kerr black holes with scalar hair

    E-Print Network [OSTI]

    Herdeiro, Carlos A R

    2014-01-01T23:59:59.000Z

    We present a family of solutions of Einstein's gravity minimally coupled to a complex, massive scalar field, describing asymptotically flat, spinning black holes with scalar hair and a regular horizon. These hairy black holes (HBHs) are supported by rotation and have no static limit. Besides mass M and angular momentum J, they carry a conserved, continuous Noether charge Q measuring the scalar hair. HBHs branch off from the Kerr metric at the threshold of the superradiant instability and reduce to spinning boson stars in the limit of vanishing horizon area. They overlap with Kerr black holes for a set of (M,J) values. A single Killing vector field preserves the solutions, tangent to the null geodesic generators of the event horizon. HBHs can exhibit sharp physical differences when compared to the Kerr solution, such as J/M^2>1, quadrupole moment larger than J^2/M and larger orbital angular velocity at the innermost stable circular orbit. Families of HBHs connected to the Kerr geometry should exist in scalar (...

  2. Black hole fireworks: quantum-gravity effects outside the horizon spark black to white hole tunneling

    E-Print Network [OSTI]

    Hal M. Haggard; Carlo Rovelli

    2014-07-06T23:59:59.000Z

    We show that there is a classical metric satisfying the Einstein equations outside a finite spacetime region where matter collapses into a black hole and then emerges from a white hole. We compute this metric explicitly. We show how quantum theory determines the (long) time for the process to happen. A black hole can thus quantum-tunnel into a white hole. For this to happen, quantum gravity should affect the metric also in a small region outside the horizon: we show that contrary to what is commonly assumed, this is not forbidden by causality or by the semiclassical approximation, because quantum effects can pile up over a long time. This scenario alters radically the discussion on the black hole information puzzle.

  3. Molecular Markers of Lung Cancer in MAYAK Workers

    SciTech Connect (OSTI)

    Steven A. Belinsky, PhD

    2007-02-15T23:59:59.000Z

    The molecular mechanisms that result in the elevated risk for lung cancer associated with exposure to radiation have not been well characterized. Workers from the MAYAK nuclear enterprise are an ideal cohort in which to study the molecular epidemiology of cancer associated with radiation exposure and to identify the genes targeted for inactivation that in turn affect individual risk for radiation-induced lung cancer. Epidemiology studies of the MAYAK cohort indicate a significantly higher frequency for adenocarcinoma and squamous cell carcinoma (SCC) in workers than in a control population and a strong correlation between these tumor types and plutonium exposure. Two hypotheses will be evaluated through the proposed studies. First, radiation exposure targets specific genes for inactivation by promoter methylation. This hypothesis is supported by our recent studies with the MAYAK population that demonstrated the targeting of the p16 gene for inactivation by promoter methylation in adenocarcinomas from workers (1). Second, genes inactivated in tumors can serve as biomarkers for lung cancer risk in a cancer-free population of workers exposed to plutonium. Support for this hypothesis is based on exciting preliminary results of our nested, case-control study of persons from the Colorado cohort. In that study, a panel of methylation markers for predicting lung cancer risk is being evaluated in sputum samples from incident lung cancer cases and controls. The first hypothesis will be tested by determining the prevalence for promoter hypermethylation of a panel of genes shown to play a critical role in the development of either adenocarcinoma and/or SCC associated with tobacco. Our initial studies on adenocarcinoma in MAYAK workers will be extended to evaluate methylation of the PAX5 {alpha}, PAX5 {beta}, H-cadherin, GATA5, and bone morphogenesis 3B (BMP3B) genes in the original sample set described under Preliminary studies. In addition, studies will be initiated in SCC from workers and controls to identify genes targeted for inactivation by plutonium in this other common histologic form of lung cancer. We will examine methylation of the p16, O{sup 6}-methylguanine-DNA methyl-transferase (MGMT), and death associated protein kinase genes ([DAP-K], evaluated previously in adenocarcinomas) as well as the new genes being assessed in the adenocarcinomas. The second hypothesis will be tested in a cross-sectional study of cancer-free workers exposed to plutonium and an unexposed population. A cohort of 700 cancer-free workers and 700 unexposed persons is being assembled, exposures are being defined, and induced sputum collected at initial entry into the study and approximately 1-year later. Exposed and unexposed persons will be matched by 5-year age intervals and smoking status (current and former). The frequency for methylation of four genes that show the greatest difference in prevalence in tumors from workers and controls will be determined in exfoliated cells within sputum. These studies will extend those in primary tumors to determine whether difference in prevalence for individual or multiple genes are detected in sputum samples from high-risk subjects exposed to plutonium. Follow-up of this cohort offers the opportunity to validate these endpoints and future biomarkers as true markers for lung cancer risk.

  4. Pulmonary function and symptoms of Nigerian workers exposed to carbon black in dry cell battery and tire factories

    SciTech Connect (OSTI)

    Oleru, U.G.; Elegbeleye, O.O.; Enu, C.C.; Olumide, Y.M.

    1983-02-01T23:59:59.000Z

    The pulmonary function and symptoms of 125 workers exposed to carbon black in dry cell battery and tire manufacturing plants were investigated. There was no significant difference in the pulmonary function of the subjects in the two plants. There was good agreement in the symptoms reported in the two different factories: cough with phlegm production, tiredness, chest pain, catarrh, headache, and skin irritation. The symptoms also corroborate those reported in the few studies on the pulmonary effects of carbon black. The suspended particulate levels in the dry cell battery plant ranged from 25 to 34 mg/m/sup 3/ and the subjects with the highest probable exposure level had the most impaired pulmonary function. The pulmonary function of the exposed subjects was significantly lower than that of a control, nonindustrially exposed population. The drop in the lung function from the expected value per year of age was relatively constant for all the study subgroups but the drop per year of duration of employment was more severe in the earlier years of employment. This study has underscored the need for occupational health regulations in the industries of developing countries.

  5. Correlation of Clinical and Dosimetric Factors With Adverse Pulmonary Outcomes in Children After Lung Irradiation

    SciTech Connect (OSTI)

    Venkatramani, Rajkumar, E-mail: rvenkatramani@chla.usc.edu [Division of Hematology/Oncology, Children's Hospital Los Angeles, Los Angeles, California (United States); Department of Pediatrics, Keck School of Medicine, University of Southern California, Los Angeles, California (United States); Kamath, Sunil [Department of Pulmonology, Children's Hospital Los Angeles, Los Angeles, California (United States); Wong, Kenneth [Division of Hematology/Oncology, Children's Hospital Los Angeles, Los Angeles, California (United States); Olch, Arthur J. [Division of Hematology/Oncology, Children's Hospital Los Angeles, Los Angeles, California (United States); Department of Radiation Oncology, University of Southern California, Los Angeles, California (United States); Malvar, Jemily [Department of Preventive Medicine, Keck School of Medicine, University of Southern California, Los Angeles, California (United States); Sposto, Richard [Division of Hematology/Oncology, Children's Hospital Los Angeles, Los Angeles, California (United States); Department of Preventive Medicine, Keck School of Medicine, University of Southern California, Los Angeles, California (United States); Goodarzian, Fariba [Department of Radiology, Children's Hospital Los Angeles, Los Angeles, California (United States); Freyer, David R. [Division of Hematology/Oncology, Children's Hospital Los Angeles, Los Angeles, California (United States); Department of Pediatrics, Keck School of Medicine, University of Southern California, Los Angeles, California (United States); Keens, Thomas G. [Department of Pediatrics, Keck School of Medicine, University of Southern California, Los Angeles, California (United States); Department of Pulmonology, Children's Hospital Los Angeles, Los Angeles, California (United States); and others

    2013-08-01T23:59:59.000Z

    Purpose: To identify the incidence and the risk factors for pulmonary toxicity in children treated for cancer with contemporary lung irradiation. Methods and Materials: We analyzed clinical features, radiographic findings, pulmonary function tests, and dosimetric parameters of children receiving irradiation to the lung fields over a 10-year period. Results: We identified 109 patients (75 male patients). The median age at irradiation was 13.8 years (range, 0.04-20.9 years). The median follow-up period was 3.4 years. The median prescribed radiation dose was 21 Gy (range, 0.4-64.8 Gy). Pulmonary toxic chemotherapy included bleomycin in 58.7% of patients and cyclophosphamide in 83.5%. The following pulmonary outcomes were identified and the 5-year cumulative incidence after irradiation was determined: pneumonitis, 6%; chronic cough, 10%; pneumonia, 35%; dyspnea, 11%; supplemental oxygen requirement, 2%; radiographic interstitial lung disease, 40%; and chest wall deformity, 12%. One patient died of progressive respiratory failure. Post-irradiation pulmonary function tests available from 44 patients showed evidence of obstructive lung disease (25%), restrictive disease (11%), hyperinflation (32%), and abnormal diffusion capacity (12%). Thoracic surgery, bleomycin, age, mean lung irradiation dose (MLD), maximum lung dose, prescribed dose, and dosimetric parameters between V{sub 22} (volume of lung exposed to a radiation dose ?22 Gy) and V{sub 30} (volume of lung exposed to a radiation dose ?30 Gy) were significant for the development of adverse pulmonary outcomes on univariate analysis. MLD, maximum lung dose, and V{sub dose} (percentage of volume of lung receiving the threshold dose or greater) were highly correlated. On multivariate analysis, MLD was the sole significant predictor of adverse pulmonary outcome (P=.01). Conclusions: Significant pulmonary dysfunction occurs in children receiving lung irradiation by contemporary techniques. MLD rather than prescribed dose should be used to perform risk stratification of patients receiving lung irradiation.

  6. Black Carbon Emissions by Rocket Engines Types of rocket engines Emissions

    E-Print Network [OSTI]

    Toohey, Darin W.

    Black Carbon Emissions by Rocket Engines Types of rocket engines Emissions Liquid Hydrogen. Note: Black carbon does not deplete ozone. What happens is the black carbon emissions from the rocket. Other black carbon emissions: The number one contributor to black carbon is burning biomass. Also

  7. Black holes in extra dimensions can decay on the bulk

    E-Print Network [OSTI]

    A. K. Chaudhuri

    2003-01-08T23:59:59.000Z

    In the extra dimensional theories, with TeV scale Plank constant, black holes may be produced in the Large Hadron Collider experiments. We have argued that in the d-dimensional black hole, the intrinsically 4-dimensional brane fields do not see the same geometry at the horizon, as in a 4-dimensional space-time. Kaluza-Klein modes invades the brane and surroundings and the brane fields can be considered as a thermal system at the temperature of the black hole. From energy and entropy consideration, we show that whether or not a six-dimensional black hole will decay by emitting Kaluza-Klein modes or the standard model particles, will depend on the length scale of the extra dimensions as well as on the mass of the black hole. For higher dimensional black holes, Kaluza-Klein modes will dominate the decay.

  8. E-Print Network 3.0 - advanced stage lung Sample Search Results

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

    to lungs. Their effectiveness may Source: Hamza-Lup, Felix G. - School of Computing, Armstrong Atlantic State University Collection: Computer Technologies and Information Sciences...

  9. HE3286, an oral synthetic steroid, treats lung inflammation in mice without immune suppression

    E-Print Network [OSTI]

    2010-01-01T23:59:59.000Z

    implications for therapy. Treat Respir Med 2004, 3:147-59.as a potential agent to treat autoimmune diseases. Autoimmunan oral synthetic steroid, treats lung inflammation in mice

  10. E-Print Network 3.0 - allergic lung disease Sample Search Results

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

    disease and promote... , teaches people with lung ... Source: National Center for Environmental Health- Publications and Products Collection: Environmental Sciences and Ecology 3...

  11. E-Print Network 3.0 - aromatic hydrocarbon-exposed lung Sample...

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

    in non-smoking and smoking lung cancer... of the fetus. These mutageniccarcinogenic pollutants include aromatic compounds such as polycyclic aromatic... of transplacental exposure...

  12. E-Print Network 3.0 - advanced lung cancer Sample Search Results

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

    cancer Search Powered by Explorit Topic List Advanced Search Sample search results for: advanced lung cancer Page: << < 1 2 3 4 5 > >> 1 aallll IIrreell aanndd ccaanncceerr...

  13. E-Print Network 3.0 - assessing lung cancer Sample Search Results

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

    - Department of Genetics, Yale University Collection: Biology and Medicine 20 Household coal use and lung cancer: systematic review and meta-analysis of casecontrol Summary:...

  14. E-Print Network 3.0 - asbestos exposure lung Sample Search Results

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

    "Physicians for Social Responsibility,"Sept. 2000... -treated playsets face an increased risk of getting lung or bladder cancer later in ... Source: Callender, Craig - Department...

  15. E-Print Network 3.0 - analysis gallium-67 lung Sample Search...

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

    ILD... , interstitial lung disease, texture analysis, co-occurrence matrix, computed tomography I. INTRODUCTION Computer... %. The aim of our work is to develop a novel texture ......

  16. A toroidal black hole for the AGN phenomenon

    E-Print Network [OSTI]

    Fulvio Pompilio; S. M. Harun-or-Rashid; Matts Roos

    2000-08-30T23:59:59.000Z

    A new approach to the study of the AGN phenomenon is proposed, in which the nucleus activity is related to the metric of the inner massive black hole. The possibility of a Toroidal Black Hole (TBH), in contrast to the usual Spherical Black Hole (SBH), is discussed as a powerful tool in understanding AGN related phenomena, such as the energetics, the production of jets and the acceleration of particles, the shape of the magnetic field and the lifetime of nucleus activity.

  17. KKW Analysis for the Dyadosphere of a Charged Black Hole

    E-Print Network [OSTI]

    I. Radinschi

    2005-11-28T23:59:59.000Z

    The Keski-Vakkuri, Kraus and Wilczek (KKW) analysis is used to compute the temperature and entropy in the dyadosphere of a charged black hole solution. For our purpose we choose the dyadosphere region of the Reissner-Nordstrom black hole solution. Our results show that the expressions of the temperature and entropy in the dyadosphere of this charged black hole are not the Hawking temperature and the Bekenstein-Hawking entropy, respectively.

  18. Hawking radiation of Dirac particles from black strings

    SciTech Connect (OSTI)

    Ahmed, Jamil; Saifullah, K., E-mail: jamil_051@yahoo.com, E-mail: saifullah@qau.edu.pk [Department of Mathematics, Quaid-i-Azam University, Islamabad (Pakistan)

    2011-08-01T23:59:59.000Z

    Hawking radiation has been studied as a phenomenon of quantum tunneling in different black holes. In this paper we extend this semi-classical approach to cylindrically symmetric black holes. Using the Hamilton-Jacobi method and WKB approximation we calculate the tunneling probabilities of incoming and outgoing Dirac particles from the event horizon and find the Hawking temperature of these black holes. We obtain results both for uncharged as well as charged particles.

  19. Brownian Motion of Black Holes in Dense Nuclei

    E-Print Network [OSTI]

    David Merritt; Peter Berczik; Frederik Laun

    2006-10-18T23:59:59.000Z

    We evaluate the Brownian motion of a massive particle ("black hole") at the center of a galaxy using N-body simulations. Our galaxy models have power-law central density cusps like those observed at the centers of elliptical galaxies. The simulations show that the black hole achieves a steady-state kinetic energy that is substantially different than would be predicted based on the properties of the galaxy model in the absence of the black hole. The reason appears to be that the black hole responds to stars whose velocities have themselves been raised by the presence of the black hole. Over a wide range of density slopes and black hole masses, the black hole's mean kinetic energy is equal to what would be predicted under the assumption that it is in energy equipartition with stars lying within a distance ~r_h/2 from it, where r_h is the black hole's influence radius. The dependence of the Brownian velocity on black hole mass is approximately ~ 1/M^{1/(3-gamma)} with gamma the power-law index of the stellar density profile, rho~1/r^gamma. This is less steep than the 1/M dependence predicted in a model where the effect of the black hole on the stellar velocities is ignored. The influence of a stellar mass spectrum on the black hole's Brownian motion is also evaluated and found to be consistent with predictions from Chandrasekhar's theory. We use these results to derive a probability function for the mass of the Milky Way black hole based on a measurement of its proper motion velocity. Interesting constraints on M will require a velocity resolution exceeding 0.5 km/s.

  20. Classical and Quantum Properties of Liouville Black Holes

    E-Print Network [OSTI]

    R. B. Mann

    1994-04-25T23:59:59.000Z

    Black hole spacetimes can arise when a Liouville field is coupled to two- dimensional gravity. Exact solutions are obtained both classically and when quantum corrections due to back reaction effects are included. The black hole temperature depends upon the mass and the thermodynamic limit breaks down before evaporation of the black hole is complete, indicating that higher-loop effects must be included for a full description of the process.

  1. A Quantum Material Model of Static Schwarzschild Black Holes

    E-Print Network [OSTI]

    S. -T. Sung

    1997-03-16T23:59:59.000Z

    A quantum-mechanical prescription of static Einstein field equation is proposed in order to construct the matter-metric eigen-states in the interior of a static Schwarzschild black hole where the signature of space-time is chosen as (--++). The spectrum of the quantum states is identified to be the integral multiples of the surface gravity. A statistical explanation of black hole entropy is given and a quantisation rule for the masses of Schwarzschild black holes is proposed.

  2. Factory Express a New Mexico Service Disabled Veteran-Owned Company

    E-Print Network [OSTI]

    Factory Express a New Mexico Service Disabled Veteran-Owned Company ... a New Mexico small business the company.'" Factory Express is the exclusive provider in New Mexico of service and sales for the type Kirtland Air Force Base in Albuquerque, New Mexico. Office size? Small. Staff size? Small. Budget? Small

  3. Mothers' Perceptions of Community Integration Opportunities for Children with Disabilities in Qatar

    E-Print Network [OSTI]

    Abbs, Alyn K

    2009-12-14T23:59:59.000Z

    .......................................................................... 61 3.1 Introduction .......................................................................................... 61 3.2 Hermeneutic Phenomenology .............................................................. 61 3.3 Participants... of the phenomena of the lived experiences of mothers of children with disabilities in Qatar and the way in which these mothers have dealt with those experiences within their own community and cultural context. 5. Hermeneutics is the science and art...

  4. Audience Response & Disability Representation in Four Film and Television Dramas: A Qualitative Audience Study

    E-Print Network [OSTI]

    Arenas Velez, Fernando

    2008-03-20T23:59:59.000Z

    . ?Realism?: Comparing Movies to Life, 151 vi Chapter 5. The Sea Inside and The Brooke Ellison Story: Truth, Lies and the ?Based on a True Story? Disability (Melo)Drama, 164 Truth and Lies in Adaptation, 168 A Movie or a Film: Distinctions of Ethics and Taste...

  5. ALTERNATE FORMATS OF THIS AGENDA WILL BE MADE AVAILABLE UPON REQUEST TO QUALIFIED INDIVIDUALS WITH DISABILITIES.

    E-Print Network [OSTI]

    , Treasurer, Deputy Treasurer, Collector, Deputy Collector, Assessor, Deputy Assessor, and General Counsel WITH DISABILITIES. APPROPRIATE INTERPRETIVE SERVICES FOR THIS MEETING WILL BE PROVIDED IF FEASIBLE UPON ADVANCE _____________________________ General Manager, Casey Hashimoto Executive Secretary to the Board, Tami Wallenburg 333 E. Canal Drive

  6. The gap in term of mobility for disabled travellers in France DEJOUX, Virginie; ARMOOGUM, Jimmy

    E-Print Network [OSTI]

    Boyer, Edmond

    The gap in term of mobility for disabled travellers in France DEJOUX, Virginie; ARMOOGUM, Jimmy 12 Verte 93166 Noisy le grand cedex Telephone: 33 1 45 92 55 88 virginie.dejoux@inrets.fr ARMOOGUM Jimmy cedex Telephone: 33 1 45 92 55 79 jimmy.armoogum@inrets.fr ABSTRACT The demographic and social changes

  7. POLICY FOR INDIVIDUALS WITH DISABILITIES Clemson University prohibits discrimination against any employee or applicant for

    E-Print Network [OSTI]

    Bolding, M. Chad

    POLICY FOR INDIVIDUALS WITH DISABILITIES Clemson University prohibits discrimination against any, layoff or termination - would be in violation of the University's policy. Clemson University will treat feels discriminated against or who has a policy related question should contact the Office of Access

  8. ODS 8/12 18 ODS DOCUMENTATION OF A LEARNING DISABILITY/ADD

    E-Print Network [OSTI]

    appropriate disability certification. The guidelines below describe the necessary components of acceptable with a copy of these guidelines. Additional questions about documentation or accommodations may be referred Test 4 (WRAT4) is not a comprehensive measure of achievement and therefore is not suitable. Information

  9. Black Holes as Conformal Field Theories on Horizons

    E-Print Network [OSTI]

    Halyo, Edi

    2015-01-01T23:59:59.000Z

    We show that any nonextreme black hole can be described by a state with $L_0=E_R$ in a $D=2$ chiral conformal field theory with central charge $c=12E_R$ where $E_R$ is the dimensionless Rindler energy of the black hole. The theory lives in the very near horizon region, i.e. around the origin of Rindler space. Black hole hair is the momentum along the Euclidean dimensionless Rindler time direction. As evidence, we show that $D$--dimensional Schwarzschild black holes and $D=2$ dilatonic ones that are obtained from them by spherical reduction are described by the same conformal field theory states.

  10. Origin of palladium black by an infrared spectroscopic method

    SciTech Connect (OSTI)

    Vozdvizhenskii, V.F.; Levintova, T.D.; Sokol'skii, D.V.

    1987-03-01T23:59:59.000Z

    Metal blacks are used as catalysts in a number of organic synthesis processes. Using the method of matrix insulation of blacks obtained from organometallic compounds in the inert atmosphere the IR spectra have been recorded for carbon monoxide adsorbed on actual palladium blacks. The controllable mild conditions for reduction of the initial complex by hydrazine hydrate provide a means of separating the intermediate states of this process. By discontinuing at various stages the reduction of the organometallic complex being investigated the authors have obtained IR spectra of carbon monoxide characterizing the stages of forming the metallic palladium black.

  11. Improved methods for simulating nearly extremal binary black holes

    E-Print Network [OSTI]

    Mark A. Scheel; Matthew Giesler; Daniel A. Hemberger; Geoffrey Lovelace; Kevin Kuper; Michael Boyle; Bela Szilagyi; Lawrence E. Kidder

    2014-12-04T23:59:59.000Z

    Astrophysical black holes could be nearly extremal (that is, rotating nearly as fast as possible); therefore, nearly extremal black holes could be among the binaries that current and future gravitational-wave observatories will detect. Predicting the gravitational waves emitted by merging black holes requires numerical-relativity simulations, but these simulations are especially challenging when one or both holes have mass $m$ and spin $S$ exceeding the Bowen-York limit of $S/m^2=0.93$. We present improved methods that enable us to simulate merging, nearly extremal black holes more robustly and more efficiently. We use these methods to simulate an unequal-mass, precessing binary black hole coalescence, where the larger black hole has $S/m^2=0.99$. We also use these methods to simulate a non-precessing binary black hole coalescence, where both black holes have $S/m^2=0.994$, nearly reaching the Novikov-Thorne upper bound for holes spun up by thin accretion disks. We demonstrate numerical convergence and estimate the numerical errors of the waveforms; we compare numerical waveforms from our simulations with post-Newtonian and effective-one-body waveforms; we compare the evolution of the black-hole masses and spins with analytic predictions; and we explore the effect of increasing spin magnitude on the orbital dynamics (the so-called "orbital hangup" effect).

  12. U-012: BlackBerry Enterprise Server Collaboration Service Bug...

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

    Advisory ID: KB28524 SecurityTracker Alert ID: 1026179 CVE-2011-0290 IMPACT ASSESSMENT: Medium Discussion: A vulnerability exists in the BlackBerry Collaboration Service...

  13. Primordial black hole evolution in tensor-scalar cosmology

    E-Print Network [OSTI]

    Ted Jacobson

    1999-09-06T23:59:59.000Z

    A perturbative analysis shows that black holes do not remember the value of the scalar field $\\phi$ at the time they formed if $\\phi$ changes in tensor-scalar cosmology. Moreover, even when the black hole mass in the Einstein frame is approximately unaffected by the changing of $\\phi$, in the Jordan-Fierz frame the mass increases. This mass increase requires a reanalysis of the evaporation of primordial black holes in tensor-scalar cosmology. It also implies that there could have been a significant magnification of the (Jordan-Fierz frame) mass of primordial black holes.

  14. Argonne's African American Black Club awards scholarships to...

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

    students July 30, 2014 Tweet EmailPrint The African American Black Club (AABC) at Argonne has awarded four scholarships to promising local Illinois high school students to...

  15. National Conference of Black Mayors, Inc. | Department of Energy

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

    Black Mayors, Inc., members' capacity for energy and environmental planning through computer-based technology, Internet access, and a training workshop. National Conference of...

  16. Black Pine Engineering Wins Clean Energy Trust Clean Energy Challenge...

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

    the Energy Innovation Portal Last week the student team of Black Pine Engineering from Michigan State University took top honors at the Eastern Midwest regional competition of...

  17. Black Hills Energy (Electric)- Residential Energy Efficiency Program

    Broader source: Energy.gov [DOE]

    Black Hills Energy (BHE) offers rebates for residential Colorado customers who purchase energy efficient residential equipment. This program offers rebates for customers who purchase and install...

  18. Black Hills Energy (Gas)- Commercial Energy Efficiency Rebate Programs

    Broader source: Energy.gov [DOE]

    Black Hills Energy offers commercial and industrial customers incentives to encourage energy efficiency in eligible businesses. Prescriptive rebates are available for furnace and boiler...

  19. Black Hills Energy (Gas)- Commercial Energy Efficiency Program

    Broader source: Energy.gov [DOE]

    Black Hills Energy offers multiple programs for Colorado commercial and industrial customers to save natural gas in eligible facilities. The commercial prescriptive rebate program provides...

  20. Black Hills Energy (Electric)- Commercial Energy Efficiency Program

    Broader source: Energy.gov [DOE]

    Black Hills Energy offers multiple programs for its Colorado commercial and industrial customers to save electricity in their facilities. The commercial prescriptive rebate program provides...

  1. Black Hills Energy (Gas)- Residential Energy Efficiency Program

    Broader source: Energy.gov [DOE]

    Black Hills Energy (BHE) offers a variety of rebates for residential Colorado customers who purchase and install energy efficient natural gas appliances, heating equipment and insulation materials....

  2. Small Hairy Black Holes in Global AdS Spacetime

    E-Print Network [OSTI]

    Pallab Basu; Jyotirmoy Bhattacharya; Sayantani Bhattacharyya; R. Loganayagam; Shiraz Minwalla; V. Umesh

    2010-05-16T23:59:59.000Z

    We study small charged black holes in global AdS spacetime in the presence of a charged massless minimally coupled scalar field. In a certain parameter range these black holes suffer from well known superradiant instabilities. We demonstrate that the end point of the resultant tachyon condensation process is a hairy black hole which we construct analytically in a perturbative expansion in the black hole radius. At leading order our solution is a small undeformed RNAdS black hole immersed into a charged scalar condensate that fills the AdS `box'. These hairy black hole solutions appear in a two parameter family labelled by their mass and charge. Their mass is bounded from below by a function of their charge; at the lower bound a hairy black hole reduces to a regular horizon free soliton which can also be thought of as a nonlinear Bose condensate. We compute the microcanonical phase diagram of our system at small mass, and demonstrate that it exhibits a second order `phase transition' between the RNAdS black hole and the hairy black hole phases.

  3. Absorption of scalars by extremal black holes in string theory

    E-Print Network [OSTI]

    Filipe Moura

    2014-06-13T23:59:59.000Z

    We show that the low frequency absorption cross section of minimally coupled massless scalar fields by extremal spherically symmetric black holes in d dimensions in the presence of string-theoretical alpha' corrections is equal to the horizon area. Classically one has the relation sigma=4GS between the absorption cross section and the black hole entropy. We discuss the validity of such relation in the presence of alpha' corrections for extremal black holes, both nonsupersymmetric and supersymmetric. The examples we consider seem to indicate that this relation is verified in the presence of alpha' corrections for supersymmetric black holes, but not for nonsupersymmetric ones.

  4. Extremal charged rotating dilaton black holes in odd dimensions

    SciTech Connect (OSTI)

    Allahverdizadeh, Masoud; Kunz, Jutta; Navarro-Lerida, Francisco [Institut fuer Physik, Universitaet Oldenburg, Postfach 2503 D-26111 Oldenburg (Germany); Departamento de Fisica Atomica, Molecular y Nuclear, Ciencias Fisicas Universidad Complutense de Madrid, E-28040 Madrid (Spain)

    2010-09-15T23:59:59.000Z

    Employing higher-order perturbation theory, we find a new class of charged rotating black hole solutions of Einstein-Maxwell-dilaton theory with general dilaton coupling constant. Starting from the Myers-Perry solutions, we use the electric charge as the perturbative parameter, and focus on extremal black holes with equal-magnitude angular momenta in odd dimensions. We perform the perturbations up to 4th order for black holes in 5 dimensions and up to 3rd order in higher odd dimensions. We calculate the physical properties of these black holes and study their dependence on the charge and the dilaton coupling constant.

  5. Extremal Charged Rotating Dilaton Black Holes in Odd Dimensions

    E-Print Network [OSTI]

    Masoud Allahverdizadeh; Jutta Kunz; Francisco Navarro-Lerida

    2010-07-24T23:59:59.000Z

    Employing higher order perturbation theory, we find a new class of charged rotating black hole solutions of Einstein-Maxwell-dilaton theory with general dilaton coupling constant. Starting from the Myers-Perry solutions, we use the electric charge as the perturbative parameter, and focus on extremal black holes with equal-magnitude angular momenta in odd dimensions. We perform the perturbations up to 4th order for black holes in 5 dimensions and up to 3rd order in higher odd dimensions. We calculate the physical properties of these black holes and study their dependence on the charge and the dilaton coupling constant.

  6. Homogeneous Einstein Metrics on SU(n) Manifolds, Hoop Conjecture for Black Rings, and Ergoregions in Magnetised Black Hole Spacetimes

    E-Print Network [OSTI]

    Mujtaba, Abid Hasan

    2013-01-09T23:59:59.000Z

    HOMOGENEOUS EINSTEIN METRICS ON SU(n) MANIFOLDS, HOOP CONJECTURE FOR BLACK RINGS, AND ERGOREGIONS IN MAGNETISED BLACK HOLE SPACETIMES A Dissertation by ABID HASAN MUJTABA Submitted to the O ce of Graduate Studies of Texas A&M University... Subject: Physics Copyright 2013 Abid Hasan Mujtaba ABSTRACT This Dissertation covers three aspects of General Relativity: inequivalent Einstein metrics on Lie Group Manifolds, proving the Hoop Conjecture for Black Rings, and investigating ergoregions...

  7. A southern black community comes of age: black San Antonio in the Great Depression, 1930-1941

    E-Print Network [OSTI]

    Jackson, Charles Christopher

    1989-01-01T23:59:59.000Z

    A&M University Press, 1984) compares the Depression This thesis follows the format of the Journal of 9 t ~Ht experiences of black, white, and Mexican American women of San Antonio. Judy Kaaz Doyle's "Maury Maverick and Racial Politics in San...A SOUTHERN BLACK COMMUNITY COMES OF AGE: BLACK SAN ANTONIO IN THE GREAT DEPRESSION, 1930-1941 A Thesis by CHARLES CHRISTOPHER JACKSON Submitted to the Office of Graduate Studies of Texas A&M University in partial fulfillment...

  8. Extraneous Carbon Assessments in Radiocarbon Measurements of Black Carbon in Environmental Matrices

    E-Print Network [OSTI]

    Coppola, Alysha; Ziolkowski, L. A.; Druffel, E. R. M.

    2013-01-01T23:59:59.000Z

    rived (black/elemental) carbon in soils and sediments usingbon measurements of black carbon in aerosols and oceanMWI, Noack AG. 2000. Black carbon in soils and sediments:

  9. T-602: BlackBerry Enterprise Server Input Validation Flaw in...

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

    02: BlackBerry Enterprise Server Input Validation Flaw in BlackBerry Web Desktop Manager Permits Cross-Site Scripting Attacks T-602: BlackBerry Enterprise Server Input Validation...

  10. Entropy: From Black Holes to Ordinary Systems

    E-Print Network [OSTI]

    J. P. Badiali

    2005-05-11T23:59:59.000Z

    Several results of black holes thermodynamics can be considered as firmly founded and formulated in a very general manner. From this starting point we analyse in which way these results may give us the opportunity to gain a better understanding in the thermodynamics of ordinary systems for which a pre-relativistic description is sufficient. First, we investigated the possibility to introduce an alternative definition of the entropy basically related to a local definition of the order in a spacetime model rather than a counting of microstates. We show that such an alternative approach exists and leads to the traditional results provided an equilibrium condition is assumed. This condition introduces a relation between a time interval and the reverse of the temperature. We show that such a relation extensively used in the black hole theory, mainly as a mathematical trick, has a very general and physical meaning here; in particular its derivation is not related to the existence of a canonical density matrix. Our dynamical approach of thermodynamic equilibrium allows us to establish a relation between action and entropy and we show that an identical relation exists in the case of black holes. The derivation of such a relation seems impossible in the Gibbs ensemble approach of statistical thermodynamics. From these results we suggest that the definition of entropy in terms of order in spacetime should be more general that the Boltzmann one based on a counting of microstates. Finally we point out that these results are obtained by reversing the traditional route going from the Schr\\"{o}dinger equation to statistical thermodynamics.

  11. Formation of subhorizon black holes from preheating

    E-Print Network [OSTI]

    E. Torres-Lomas; Juan Carlos Hidalgo; Karim A. Malik; L. Arturo Urea-Lpez

    2014-04-29T23:59:59.000Z

    We study the production of primordial black holes (PBHs) during the preheating stage that follows a chaotic inflationary phase. The scalar fields present in the process are evolved numerically using a modified version of the HLATTICE code. From the output of the numerical simulation, we compute the probability distribution of curvature fluctuations, paying particular attention to sub-horizon scales. We find that in some specific models these modes grow to large amplitudes developing highly non-Gaussian probability distributions. We then calculate PBH abundances using the standard Press-Schechter criterion and find that overproduction of PBHs is likely in some regions of the chaotic preheating parameter space.

  12. A black potential for spin less particles

    E-Print Network [OSTI]

    Ananya Ghatak; Mohammad Hasan; Bhabani Prasad Mandal

    2014-12-02T23:59:59.000Z

    We consider the most general non-Hermitian Hulthen potential to study the scattering of spin-less relativistic particles. The conditions for CC, SS and CPA are obtained analytically for this potential. We show that almost total absorption occurs for entire range of incidence energy for certain parameter ranges of the potential and hence term this as `black potential'. Time reversed of the same potential shows perfect emission for the entire range of particle energy. We also present the classical analog of this potential in terms of waveguide cross section.

  13. Conformal Invariance of Black Hole Temperature

    E-Print Network [OSTI]

    Ted Jacobson; Gungwon Kang

    1993-07-06T23:59:59.000Z

    It is shown that the surface gravity and temperature of a stationary black hole are invariant under conformal transformations of the metric that are the identity at infinity. More precisely, we find a conformal invariant definition of the surface gravity of a conformal Killing horizon that agrees with the usual definition(s) for a true Killing horizon and is proportional to the temperature as defined by Hawking radiation. This result is reconciled with the intimate relation between the trace anomaly and the Hawking effect, despite the {\\it non}invariance of the trace anomaly under conformal transformations.

  14. Black Hole Thermodynamics and Lorentz Symmetry

    E-Print Network [OSTI]

    Ted Jacobson; Aron C. Wall

    2010-02-04T23:59:59.000Z

    Recent developments point to a breakdown in the generalized second law of thermodynamics for theories with Lorentz symmetry violation. It appears possible to construct a perpetual motion machine of the second kind in such theories, using a black hole to catalyze the conversion of heat to work. Here we describe and extend the arguments leading to that conclusion. We suggest the inference that local Lorentz symmetry may be an emergent property of the macroscopic world with origins in a microscopic second law of causal horizon thermodynamics.

  15. Geodesic Study of Regular Hayward Black Hole

    E-Print Network [OSTI]

    G. Abbas; U. Sabiullah

    2014-06-03T23:59:59.000Z

    This paper is devoted to study the geodesic structure of regular Hayward black hole. The timelike and null geodesic have been studied explicitly for radial and non-radial motion. For timelike and null geodesic in radial motion there exists analytical solution, while for non-radial motion the effective potential has been plotted, which investigates the position and turning points of the particle. It has been found that massive particle moving along timelike geodesics path are dragged towards the BH and continues move around BH in particular orbits.

  16. Fundamental studies of black liquor combustion

    SciTech Connect (OSTI)

    Clay, D.T.; Lien, S.J.; Grace, T.M.; Brown, C.A.; Empie, H.L.; Macek, A.; Amin, N.; Charangundla, S.R.

    1990-03-01T23:59:59.000Z

    The fundamentals of black liquor combustion are being studied in a project being carried out for the US Department of Energy by the Institute of Paper Science Technology (IPST, formerly the Institute of Paper Chemistry) and the National Institute of Science Technology (NIST, formerly the National Bureau of Standards). The project was divided into four phases. This report covers the completion of Phase 1 (in-flight processes), the results of all of the work on Phase 2 (char bed processes), Phase 3 (fume processes), and Phase 4 (furnace simulation). 41 refs., 62 figs., 30 tabs.

  17. Black River Electric Coop | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Office of Inspector GeneralDepartmentAUDIT REPORTOpenWendeGuo Feng Bio JumpVenturesCoral Capital JumpBlack River

  18. Black Warrior Geothermal Area | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Office of Inspector GeneralDepartmentAUDIT REPORTOpenWendeGuo Feng Bio JumpVenturesCoral Capital JumpBlack

  19. Black Diamond Power Co | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home5b9fcbce19 NoPublic Utilities Address: 160Benin: Energy ResourcesJersey:form ViewBlack Diamond Power Co Jump to: navigation,

  20. Black Hills Corporation | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home5b9fcbce19 NoPublic Utilities Address: 160Benin: Energy ResourcesJersey:form ViewBlack Diamond Power Co JumpHawk County,

  1. Black Hills Power Inc | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home5b9fcbce19 NoPublic Utilities Address: 160Benin: Energy ResourcesJersey:form ViewBlack Diamond Power Co JumpHawk County,Power

  2. Black Warrior Geothermal Area | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home5b9fcbce19 NoPublic Utilities Address: 160Benin: Energy ResourcesJersey:form ViewBlack Diamond Power Co JumpHawkIII(Redirected

  3. BlackHawk Fund | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home5b9fcbce19 NoPublic Utilities Address: 160Benin: Energy ResourcesJersey:form ViewBlack Diamond Power CoWolf, Wisconsin:

  4. Black Mountain Insulation | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Office of InspectorConcentrating SolarElectricEnergyCTBarre BiomassTHIS PAGE ISJump to: navigation,Black Hills Name:

  5. Lumens Placard (Black) | Department of Energy

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr May Jun Jul(Summary) "ofEarly Career Scientists'Montana.ProgramJulietipDepartmentJuneWhenJulyBadgesSeptemberoflumens_placard-black.eps

  6. Thermodynamics of (2+1)-dimensional acoustic black hole based on the generalized uncertainty principle

    E-Print Network [OSTI]

    Wontae Kim; Edwin J. Son; Myungseok Yoon

    2008-01-09T23:59:59.000Z

    We study thermodynamic quantities of an acoustic black hole and its thermodynamic stability in a cavity based on the generalized uncertainty principle. It can be shown that there is a minimal black hole which can be a stable remnant after black hole evaporation. Moreover, the behavior of the free energy shows that the large black hole is stable too. Therefore, the acoustic black hole can decay into the remnant or the large black hole.

  7. Does living near heavy industry cause lung cancer in women? A case control study using life grid interviews.

    E-Print Network [OSTI]

    Edwards, R; Pless-Mulloli, T; Howel, D; Chadwick, TJ; Bhopal, Raj; Harrison, R N; Gribbin, H

    2006-10-13T23:59:59.000Z

    of a modestly raised risk of lung cancer with prolonged residence close to heavy industry, although the confidence intervals were wide. The effect of air pollution on the incidence of lung cancer merits continued study....

  8. Using the master's tools : representations of blackness and the strategies of stereotype

    E-Print Network [OSTI]

    Zygmonski, Aimee

    2010-01-01T23:59:59.000Z

    Watermelon, Black Woman with Drumstick, and other-worldlyBlack Woman with Drumstick, making obvious connotations toWith Watermelon? and With Drumstick? I would argue the

  9. E-Print Network 3.0 - ads schwarzschild black Sample Search Results

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

    spacetime. However, unlike shock matching outside a Black Hole... to infinity along a geodesic of the Schwarzschild metric outside the Black Hole. Thus the OS solution gives... ,...

  10. E-Print Network 3.0 - asian black latino Sample Search Results

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

    Ethnic Summary: IndianNative American Asian Black or African American HispanicLatino White Multi-Racial Unspecified... Native American Asian Black or African American Hispanic...

  11. Black Carbons Properties and Role in the Environment: A Comprehensive Review

    E-Print Network [OSTI]

    Shrestha, Gyami

    2010-01-01T23:59:59.000Z

    NOAA/ESRL. Mauna Loa Carbon Dioxide Annual Mean Data.H. Can reducing black carbon emissions counteract globalanalysis of black carbon in soils. Global Biogeochem. Cycle.

  12. Ultrasound-induced lung hemorrhage is not caused by inertial cavitation

    E-Print Network [OSTI]

    Illinois at Urbana-Champaign, University of

    Ultrasound-induced lung hemorrhage is not caused by inertial cavitation William D. O'Brien, Jr to an inertial cavitation mechanism. The purpose of this article is to report the results of two experiments that directly contradict the hypothesis that ultrasound-induced lung hemorrhage is caused by inertial cavitation

  13. Response to ``Comment on `Ultrasound-induced lung hemorrhage is not caused by inertial cavitation'''

    E-Print Network [OSTI]

    Illinois at Urbana-Champaign, University of

    Response to ``Comment on `Ultrasound-induced lung hemorrhage is not caused by inertial cavitation cavitation nuclei in lung versus other tissues such that overpressure does not affect the inertial cavitation this question, let us first be clear as to what we believe would and would not constitute inertial cavitation

  14. KILLING OF TARGET CELLS DUE TO RADON PROGENY IN THE HUMAN LUNG

    E-Print Network [OSTI]

    Yu, K.N.

    KILLING OF TARGET CELLS DUE TO RADON PROGENY IN THE HUMAN LUNG B. M. F. Lau1 , D. Nikezic1,2 and K to inhaled radon progeny in the human lung. The present work uses the microdosimetric approach and determines- ratory tract (HRT) due to inhaled radon progeny, ICRP66(1) made use of the absorbed fraction (AF) which

  15. Decrements in Lung Function Related to Arsenic in Drinking Water in West Bengal, India

    E-Print Network [OSTI]

    California at Berkeley, University of

    Decrements in Lung Function Related to Arsenic in Drinking Water in West Bengal, India Ondine S­2000, the authors investigated relations between lung function, respiratory symptoms, and arsenic in drinking water. Worldwide, populations have been identified that con- sume drinking water with arsenic concentrations above

  16. Nonrotating black hole in a post-Newtonian tidal environment

    E-Print Network [OSTI]

    Stephanne Taylor; Eric Poisson

    2008-09-11T23:59:59.000Z

    We examine the motion and tidal dynamics of a nonrotating black hole placed within a post-Newtonian external spacetime. The tidal perturbation created by the external environment is treated as a small perturbation. At a large distance from the black hole, the gravitational field of the external distribution of matter is assumed to be sufficiently weak to be adequately described by the (first) post-Newtonian approximation to general relativity. There, the black hole is treated as a monopole contribution to the total gravitational field. There exists an overlap in the domains of validity of each description, and the black-hole and post-Newtonian metrics are matched in the overlap. The matching procedure produces the equations of motion for the black hole and the gravito-electric and gravito-magnetic tidal fields acting on the black hole. We first calculate the equations of motion and tidal fields by making no assumptions regarding the nature of the post-Newtonian environment; this could contain a continuous distribution of matter or any number of condensed bodies. We next specialize our discussion to a situation in which the black hole is a member of a post-Newtonian two-body system. As an application of our results, we examine the geometry of the deformed event horizon and calculate the tidal heating of the black hole, the rate at which it acquires mass as a result of its tidal interaction with the companion body.

  17. Verifying Red-Black Trees Paolo Baldan1

    E-Print Network [OSTI]

    Baldan, Paolo

    Verifying Red-Black Trees Paolo Baldan1 , Andrea Corradini2 , Javier Esparza3 , Tobias Heindel3,heindets,koenigba,koziouvi}@fmi.uni-stuttgart.de Abstract. We show how to verify the correctness of insertion of ele- ments into red-black trees--a form of balanced search trees--using anal- ysis techniques developed for graph rewriting. We first model red

  18. Accelerating and rotating black holes J. B. Griffiths1

    E-Print Network [OSTI]

    Accelerating and rotating black holes J. B. Griffiths1 and J. Podolsk´y2 1Department Abstract An exact solution of Einstein's equations which represents a pair of accelerating and rotating which explicitly contains the known special cases for either rotating or accelerating black holes

  19. Large rotating AdS black holes from fluid mechanics

    E-Print Network [OSTI]

    Sayantani Bhattacharyya; Subhaneil Lahiri; R. Loganayagam; Shiraz Minwalla

    2008-07-25T23:59:59.000Z

    We use the AdS/CFT correspondence to argue that large rotating black holes in global AdS(D) spaces are dual to stationary solutions of the relativistic Navier-Stokes equations on S**(D-2). Reading off the equation of state of this fluid from the thermodynamics of non-rotating black holes, we proceed to construct the nonlinear spinning solutions of fluid mechanics that are dual to rotating black holes. In all known examples, the thermodynamics and the local stress tensor of our solutions are in precise agreement with the thermodynamics and boundary stress tensor of the spinning black holes. Our fluid dynamical description applies to large non-extremal black holes as well as a class of large non-supersymmetric extremal black holes, but is never valid for supersymmetric black holes. Our results yield predictions for the thermodynamics of all large black holes in all theories of gravity on AdS spaces, for example, string theory on AdS(5) x S**5 and M theory on AdS(4) x S**7 and AdS(7) x S**4.

  20. Analysis of spherically symmetric black holes in Braneworld models

    E-Print Network [OSTI]

    A. B. Pavan

    2010-05-25T23:59:59.000Z

    Research on black holes and their physical proprieties has been active on last 90 years. With the appearance of the String Theory and the Braneworld models as alternative descriptions of our Universe, the interest on black holes, in these context, increased. In this work we studied black holes in Braneworld models. A class of spherically symmetric black holes is investigaded as well its stability under general perturbations. Thermodynamic proprieties and quasi-normal modes are discussed. The black holes studied are the SM (zero mass) and CFM solutions, obtained by Casadio {\\it et al.} and Bronnikov {\\it et al.}. The geometry of bulk is unknown. However the Campbell-Magaard Theorem guarantees the existence of a 5-dimensional solution in the bulk whose projection on the brane is the class of black holes considered. They are stable under scalar perturbations. Quasi-normal modes were observed in both models. The tail behavior of the perturbations is the same. The entropy upper bound of a body absorved by the black holes studied was calculated. This limit turned out to be independent of the black hole parameters.

  1. Pair Production of Topological anti de Sitter Black Holes

    E-Print Network [OSTI]

    R. B. Mann

    1996-07-28T23:59:59.000Z

    The pair creation of black holes with event horizons of non-trivial topology is described. The spacetimes are all limiting cases of the cosmological $C$ metric. They are generalizations of the $(2+1)$ dimensional black hole and have asymptotically anti de Sitter behaviour. Domain walls instantons can mediate their pair creation for a wide range of mass and charge.

  2. Synchronous Black Hole Search in Directed Graphs Adrian Kosowski

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    Synchronous Black Hole Search in Directed Graphs Adrian Kosowski Alfredo Navarra Cristina M called black hole nodes, and once a robot enters in one of them, it is destroyed. The goal is to find supported by the Italian CNR Short-Term Mobility Program. A. Kosowski was supported Polish Ministry Grant N

  3. Modified Black Hole with Polar Jet and Vortex

    E-Print Network [OSTI]

    T. Tmmalm

    2001-12-06T23:59:59.000Z

    There are many models relating an accretion disk of Black Hole to jet outflow. The herein heuristic model describes the continuation of an external accretion disk to an internal accretion disk for less than Black Hole horizon, and subsequent polar jet outflow along polar axis out of polar vortex wherein the event horizon is no longer descriptive.

  4. Electromagnetic extraction of energy from Kerr black holes

    E-Print Network [OSTI]

    Isao Okamoto

    2005-06-14T23:59:59.000Z

    We elucidate the `right' process for energy extraction from Kerr black holes through `FFDE' magnetospheres, free from causality violation. It is shown that the magnetosphere of a Kerr black hole possesses the double-structure, consisting of the inner and outer magnetospheres with the pair-creation gap between them and with respective unipolar batteries at the inner and outer surfaces of the gap.

  5. "Black Box" EMC model for Power Electronics Converter Mikael Foissac

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    "Black Box" EMC model for Power Electronics Converter Mikael Foissac Grenoble Electrical be forecasted accurately, in order to avoid disturbance of the complete system. To quantify the EMC behaviour will then illustrate the method on a complete chopper cell. II. BLACK BOX EMC MODEL Any EMC analysis must account

  6. X] THEPROPAGATIONOF BLACK BASS IN PONDS. BY WILLIAM F. PAGE,

    E-Print Network [OSTI]

    X] THEPROPAGATIONOF BLACK BASS IN PONDS. BY WILLIAM F. PAGE, Superintendent U.S. Fish Commission to add to the fish supply by broadening the habitat of the black bass. But while fish-culturists were States, engaged in fish-culture were annually, at the period of the bass spawning, devoting every energy

  7. Structure and Mass Absorption of Hypothetical Terrestrial Black Holes

    E-Print Network [OSTI]

    A. P. VanDevender; J. Pace VanDevender

    2011-05-02T23:59:59.000Z

    The prospect of mini black holes, either primordial or in planned experiments at the Large Hadron Collider, interacting with the earth motivate us to examine how they may be detected and the scope of their impact on the earth. We propose that the more massive of these objects may gravitationally bind matter without significant absorption. Since the wave functions of gravitationally bound atoms orbiting a black hole are analogous to those of electrons around a nucleus, we call such an object the Gravitationally Equivalent of an Atom (GEA). Mini black holes are expected to lose mass through quantum evaporation, which has become well accepted on purely theoretical grounds. Since all attempts to directly observe x-rays from an evaporating black hole have failed, we examine the possibility of the inverse test: search for extant mini black holes by looking for emissions from matter bound in a GEA. If quantum evaporation does not occur, then miniature black holes left over from the early universe may be stable, contribute to dark matter, and in principle be detectable through emissions associated with the bound matter. We show that small black holes-with masses below \\sim10^12 kg-can bind matter without readily absorbing it into the black hole but the emissions are too weak to be detected from earth.

  8. Instabilities of (near) extremal rotating black holes in higher dimensions

    E-Print Network [OSTI]

    Stefan Hollands; Akihiro Ishibashi

    2014-08-04T23:59:59.000Z

    Recently, Durkee and Reall have conjectured a criterion for linear instability of rotating, extremal, asymptotically Minkowskian black holes in $d\\ge 4$ dimensions, such as the Myers-Perry black holes. They considered a certain elliptic operator, $\\cal A$, acting on symmetric traceless tensors intrinsic to the horizon. Based in part on numerical evidence, they suggested that if the lowest eigenvalue, $\\lambda$, of this operator is less than the critical value $-1/4$ ( called "effective BF-bound"), then the black hole is linearly unstable. In this paper, we prove their conjecture. Our proof uses a combination of methods such as (i) the "canonical energy method" of Hollands-Wald, (ii) algebraically special properties of the near horizon geometries associated with the black hole, and (iii) the structure of the (linearized) constraint equations. Our method of proof is also applicable to rotating, extremal asymptotically Anti-deSitter black holes. In that case, our methods show that "all" such black holes are unstable. Although we explicitly discuss in this paper only extremal black holes, we argue that our methods can be generalized straightforwardly to obtain the same results for "near" extremal black holes.

  9. Sequencing the Black Aspergilli species complex

    SciTech Connect (OSTI)

    Kuo, Alan; Salamov, Asaf; Zhou, Kemin; Otillar, Robert; Baker, Scott; Grigoriev, Igor

    2011-03-11T23:59:59.000Z

    The ~15 members of the Aspergillus section Nigri species complex (the "Black Aspergilli") are significant as platforms for bioenergy and bioindustrial technology, as members of soil microbial communities and players in the global carbon cycle, and as food processing and spoilage agents and agricultural toxigens. Despite their utility and ubiquity, the morphological and metabolic distinctiveness of the complex's members, and thus their taxonomy, is poorly defined. We are using short read pyrosequencing technology (Roche/454 and Illumina/Solexa) to rapidly scale up genomic and transcriptomic analysis of this species complex. To date we predict 11197 genes in Aspergillus niger, 11624 genes in A. carbonarius, and 10845 genes in A. aculeatus. A. aculeatus is our most recent genome, and was assembled primarily from 454-sequenced reads and annotated with the aid of >2 million 454 ESTs and >300 million Solexa ESTs. To most effectively deploy these very large numbers of ESTs we developed 2 novel methods for clustering the ESTs into assemblies. We have also developed a pipeline to propose orthologies and paralogies among genes in the species complex. In the near future we will apply these methods to additional species of Black Aspergilli that are currently in our sequencing pipeline.

  10. Light Loop Echoes and Blinking Black Holes

    E-Print Network [OSTI]

    Boyle, Latham

    2011-01-01T23:59:59.000Z

    Radiation emitted near a black hole reaches the observer by multiple paths; and when this radiation varies in time, the time-delays between the various paths generate a "blinking" effect in the observed light curve L(t) or its auto-correlation function xi(T)= . For the particularly important "face-on" configuration (in which the hole is viewed roughly along its spin axis, while the emission comes roughly from its equatorial plane -- e.g. from the inner edge of its accretion disk, or from the violent flash of a nearby/infalling star) we calculate the blinking in detail by computing the time delay Delta t_{j}(r,a) and magnification mu_{j}(r,a) of the jth path (j=1,2,3,...), relative to the primary path (j=0), as a function of the emission radius r and black hole spin 0

  11. Black holes in f(R) theories

    SciTech Connect (OSTI)

    Cruz-Dombriz, A. de la; Dobado, A.; Maroto, A. L. [Departamento de Fisica Teorica I, Universidad Complutense de Madrid, 28040 Madrid (Spain)

    2009-12-15T23:59:59.000Z

    In the context of f(R) theories of gravity, we address the problem of finding static and spherically symmetric black hole solutions. Several aspects of constant curvature solutions with and without electric charge are discussed. We also study the general case (without imposing constant curvature). Following a perturbative approach around the Einstein-Hilbert action, it is found that only solutions of the Schwarzschild-(anti) de Sitter type are present up to second order in perturbations. Explicit expressions for the effective cosmological constant are obtained in terms of the f(R) function. Finally, we have considered the thermodynamics of black holes in anti-de Sitter space-time and found that this kind of solution can only exist provided the theory satisfies R{sub 0}+f(R{sub 0})<0. Interestingly, this expression is related to the condition which guarantees the positivity of the effective Newton's constant in this type of theories. In addition, it also ensures that the thermodynamical properties in f(R) gravities are qualitatively similar to those of standard general relativity.

  12. Black Hole Instabilities and Exponential Growth

    E-Print Network [OSTI]

    Prabhu, Kartik

    2015-01-01T23:59:59.000Z

    Recently, a general analysis has been given of the stability with respect to axisymmetric perturbations of stationary-axisymmetric black holes and black branes in vacuum general relativity in arbitrary dimensions. It was shown that positivity of canonical energy on an appropriate space of perturbations is necessary and sufficient for stability. However, the notions of both "stability" and "instability" in this result are significantly weaker than one would like to obtain. In this paper, we prove that if a perturbation of the form $\\pounds_t \\delta g$---with $\\delta g$ a solution to the linearized Einstein equation---has negative canonical energy, then that perturbation must, in fact, grow exponentially in time. The key idea is to make use of the $t$- or ($t$-$\\phi$)-reflection isometry, $i$, of the background spacetime and decompose the initial data for perturbations into their odd and even parts under $i$. We then write the canonical energy as $\\mathscr E\\ = \\mathscr K + \\mathscr U$, where $\\mathscr K$ and $...

  13. Primordial black holes as biased tracers

    E-Print Network [OSTI]

    Tada, Yuichiro

    2015-01-01T23:59:59.000Z

    Primordial black holes (PBHs) are theoretical black holes which may be formed during the radiation dominant era and, basically, caused by the gravitational collapse of radiational overdensities. It has been well known that in the context of the structure formation in our Universe such collapsed objects, e.g., halos/galaxies, could be considered as bias tracers of underlying matter fluctuations and the halo/galaxy bias has been studied well. Employing a peak-background split picture which is known to be a useful tool to discuss the halo bias, we consider the large scale clustering behavior of the PBH and propose an almost mass-independent constraint to the scenario that dark matters (DMs) consist of PBHs. We consider the case where the statistics of the primordial curvature perturbations is almost Gaussian, but with small local-type non-Gaussianity. If PBHs account for the DM abundance, such a large scale clustering of PBHs behaves as nothing but the matter isocurvature perturbation and constrained strictly by...

  14. Black holes can have curly hair

    E-Print Network [OSTI]

    K. A. Bronnikov; O. B. Zaslavskii

    2008-05-29T23:59:59.000Z

    We study equilibrium conditions between a static, spherically symmetric black hole and classical matter in terms of the radial pressure to density ratio p_r/\\rho = w(u), where u is the radial coordinate. It is shown that such an equilibrium is possible in two cases: (i) the well-known case w\\to -1 as $u\\to u_h (the horizon), i.e., "vacuum" matter, for which \\rho(u_h) can be nonzero; (ii) w \\to -1/(1+2k) and \\rho \\sim (u-u_h)^k as u\\to u_h, where k>0 is a positive integer (w=-1/3 in the generic case k=1). A non-interacting mixture of these two kinds of matter can also exist. The whole reasoning is local, hence the results do not depend on any global or asymptotic conditions. They mean, in particular, that a static black hole cannot live inside a star with nonnegative pressure and density. As an example, an exact solution for an isotropic fluid with w = -1/3 (that is, a fluid of disordered cosmic strings), with or without vacuum matter, is presented.

  15. Experimental Signature for Black Hole Production in Neutrino Air Showers

    E-Print Network [OSTI]

    Luis Anchordoqui; Haim Goldberg

    2001-10-15T23:59:59.000Z

    The existence of extra degrees of freedom beyond the electroweak scale may allow the formation of black holes in nearly horizontal neutrino air showers. In this paper we examine the average properties of the light descendants of these black holes. Our analysis indicates that black hole decay gives rise to deeply penetrating showers with an electromagnetic component which differs substantially from that in conventional neutrino interactions, allowing a good characterization of the phenomenon against background. Naturally occurring black holes in horizontal neutrino showers could be detected and studied with the Auger air shower array. Since the expected black hole production rate at Auger is $> 1$ event/year, this cosmic ray observatory could be potentially powerful in probing models with extra dimensions and TeV-scale gravity.

  16. Quasinormal modes of test fields around regular black holes

    E-Print Network [OSTI]

    Bobir Toshmatov; Ahmadjon Abdujabbarov; Zden?k Stuchlk; Bobomurat Ahmedov

    2015-03-19T23:59:59.000Z

    We study scalar, electromagnetic and gravitational test fields in the Hayward, Bardeen and Ay\\'{o}n-Beato-Garc\\'{i}a regular black hole spacetimes and demonstrate that the test fields are stable in all these spacetimes. Using the sixth order WKB approximation of the linear "axial" perturbative scheme, we determine dependence of the quasinormal mode (QNM) frequencies on the characteristic parameters of the test fields and the spacetime charge parameters of the regular black holes. We give also the greybody factors, namely the transmission and reflection coefficients of scattered scalar, electromagnetic and gravitational waves. We show that damping of the QNMs in regular black hole spacetimes is suppressed in comparison to the case of Schwarzschild black holes, and increasing charge parameter of the regular black holes increases reflection and decreases transmission factor of incident waves for each of the test fields.

  17. Implications of a viscosity bound on black hole accretion

    E-Print Network [OSTI]

    Aninda Sinha; Banibrata Mukhopadhyay

    2012-02-13T23:59:59.000Z

    Motivated by the viscosity bound in gauge/gravity duality, we consider the ratio of shear viscosity (eta) to entropy density (s) in black hole accretion flows. We use both an ideal gas equation of state and the QCD equation of state obtained from lattice for the fluid accreting onto a Kerr black hole. The QCD equation of state is considered since the temperature of accreting matter is expected to approach 10^{12}K in certain hot flows. We find that in both the cases eta/s is small only for primordial black holes and several orders of magnitude larger than any known fluid for stellar and supermassive black holes. We show that a lower bound on the mass of primordial black holes leads to a lower bound on eta/s and vice versa. Finally we speculate that the Shakura-Sunyaev viscosity parameter should decrease with increasing density and/or temperatures.

  18. Hypervelocity binary stars: smoking gun of massive binary black holes

    E-Print Network [OSTI]

    Youjun Lu; Qingjuan Yu; D. N. C. Lin

    2007-07-22T23:59:59.000Z

    The hypervelocity stars recently found in the Galactic halo are expelled from the Galactic center through interactions between binary stars and the central massive black hole or between single stars and a hypothetical massive binary black hole. In this paper, we demonstrate that binary stars can be ejected out of the Galactic center with velocities up to 10^3 km/s, while preserving their integrity, through interactions with a massive binary black hole. Binary stars are unlikely to attain such high velocities via scattering by a single massive black hole or through any other mechanisms. Based on the above theoretical prediction, we propose a search for binary systems among the hypervelocity stars. Discovery of hypervelocity binary stars, even one, is a definitive evidence of the existence of a massive binary black hole in the Galactic center.

  19. Black Hole Hair Removal: Non-linear Analysis

    E-Print Network [OSTI]

    Dileep P. Jatkar; Ashoke Sen; Yogesh K. Srivastava

    2009-07-03T23:59:59.000Z

    BMPV black holes in flat transverse space and in Taub-NUT space have identical near horizon geometries but different microscopic degeneracies. It has been proposed that this difference can be accounted for by different contribution to the degeneracies of these black holes from hair modes, -- degrees of freedom living outside the horizon. In this paper we explicitly construct the hair modes of these two black holes as finite bosonic and fermionic deformations of the black hole solution satisfying the full non-linear equations of motion of supergravity and preserving the supersymmetry of the original solutions. Special care is taken to ensure that these solutions do not have any curvature singularity at the future horizon when viewed as the full ten dimensional geometry. We show that after removing the contribution due to the hair degrees of freedom from the microscopic partition function, the partition functions of the two black holes agree.

  20. Bitumen fume-induced gene expression profile in rat lung

    SciTech Connect (OSTI)

    Gate, Laurent [Institut National de Recherche et Securite, Avenue de Bourgogne, BP 27, 54501 Vandoeuvre Cedex (France)]. E-mail: laurent.gate@inrs.fr; Langlais, Cristina [Institut National de Recherche et Securite, Avenue de Bourgogne, BP 27, 54501 Vandoeuvre Cedex (France); Micillino, Jean-Claude [Institut National de Recherche et Securite, Avenue de Bourgogne, BP 27, 54501 Vandoeuvre Cedex (France); Nunge, Herve [Institut National de Recherche et Securite, Avenue de Bourgogne, BP 27, 54501 Vandoeuvre Cedex (France); Bottin, Marie-Claire [Institut National de Recherche et Securite, Avenue de Bourgogne, BP 27, 54501 Vandoeuvre Cedex (France); Wrobel, Richard [Institut National de Recherche et Securite, Avenue de Bourgogne, BP 27, 54501 Vandoeuvre Cedex (France); Binet, Stephane [Institut National de Recherche et Securite, Avenue de Bourgogne, BP 27, 54501 Vandoeuvre Cedex (France)

    2006-08-15T23:59:59.000Z

    Exposure to bitumen fumes during paving and roofing activities may represent an occupational health risk. To date, most of the studies performed on the biological effect of asphalt fumes have been done with regard to their content in carcinogenic polycyclic aromatic hydrocarbons (PAH). In order to gain an additional insight into the mechanisms of action of bitumen fumes, we studied their pulmonary effects in rodents following inhalation using the microarray technology. Fisher 344 rats were exposed for 5 days, 6 h/day to bitumen fumes generated at road paving temperature (170 {sup o}C) using a nose-only exposition device. With the intention of studying the early transcriptional events induced by asphalt fumes, lung tissues were collected immediately following exposure and gene expression profiles in control and exposed rats were determined by using oligonucleotide microarrays. Data analysis revealed that genes involved in lung inflammatory response as well as genes associated with PAH metabolization and detoxification were highly expressed in bitumen-exposed animals. In addition, the expression of genes related to elastase activity and its inhibition which are associated with emphysema was also modulated. More interestingly genes coding for monoamine oxidases A and B involved in the metabolism of neurotransmitters and xenobiotics were downregulated in exposed rats. Altogether, these data give additional information concerning the bitumen fumes biological effects and would allow to better review the health effects of occupational asphalt fumes exposure.

  1. 2D/3D registration algorithm for lung brachytherapy

    SciTech Connect (OSTI)

    Zvonarev, P. S. [McMaster University, Medical Physics and Applied Radiation Sciences, Hamilton, Ontario L8S 4L8 (Canada); Farrell, T. J.; Hunter, R.; Wierzbicki, M.; Hayward, J. E. [McMaster University, Medical Physics and Applied Radiation Sciences, Hamilton, Ontario L8S 4L8 (Canada); Juravinski Cancer Centre, Medical Physics, Hamilton, Ontario L8V 5C2 (Canada); Sur, R. K. [McMaster University, Medical Physics and Applied Radiation Sciences, Hamilton, Ontario L8S 4L8 (Canada); Juravinski Cancer Centre, Radiation Oncology, Hamilton, Ontario L8V 5C2 (Canada)

    2013-02-15T23:59:59.000Z

    Purpose: A 2D/3D registration algorithm is proposed for registering orthogonal x-ray images with a diagnostic CT volume for high dose rate (HDR) lung brachytherapy. Methods: The algorithm utilizes a rigid registration model based on a pixel/voxel intensity matching approach. To achieve accurate registration, a robust similarity measure combining normalized mutual information, image gradient, and intensity difference was developed. The algorithm was validated using a simple body and anthropomorphic phantoms. Transfer catheters were placed inside the phantoms to simulate the unique image features observed during treatment. The algorithm sensitivity to various degrees of initial misregistration and to the presence of foreign objects, such as ECG leads, was evaluated. Results: The mean registration error was 2.2 and 1.9 mm for the simple body and anthropomorphic phantoms, respectively. The error was comparable to the interoperator catheter digitization error of 1.6 mm. Preliminary analysis of data acquired from four patients indicated a mean registration error of 4.2 mm. Conclusions: Results obtained using the proposed algorithm are clinically acceptable especially considering the complications normally encountered when imaging during lung HDR brachytherapy.

  2. Your Words, You are in a unique position to shape the public image of people with disabilities.

    E-Print Network [OSTI]

    Cripple Person with autism, on the autism spectrum Autistic Person with Down syndrome Mongoloid Person Gimp, lame Congenital disability Birth defect Burn survivor Burn victim Post-polio syndrome Suffers

  3. Effectiveness of Employing Multimedia Principles in The Design of Computer-Based Math Tutorials for Students with Learning Disabilities

    E-Print Network [OSTI]

    Kanitkar, Anjali Shridhar

    2010-04-28T23:59:59.000Z

    DL). The animated tutorial prototype, which was studied as part of this project, was for young children. The study evaluated a prototype of online instructional tutorial in mathematics designed for students with disabilities. The tutorial prototype was instructional...

  4. An Analysis of the Relationship between Principal Employment Interview Scores and the Achievement Scores of Students with Specific Learning Disabilities

    E-Print Network [OSTI]

    Ostmeyer, Susan

    2012-05-31T23:59:59.000Z

    Leadership domains ......................................................................................................... 9 Localizing leadership behaviors ..................................................................................... 10...) .......................... 34 Table 9 Correlations for Socio-Economic Status and Measures of Leadership .......................... 34 Table 10 Regression Results for Multiple Predictors and Achievement for Students with Specific Learning Disabilities...

  5. The Perspectives of Individuals with Cognitive Disabilities and/or Autism on Their Lives and Their Problem Behavior.

    E-Print Network [OSTI]

    Ruef, Michael B.; Turnbull, Ann P.

    2002-01-01T23:59:59.000Z

    The purpose of the study was 2-fold: (a) to explore the perceptions of individuals with cognitive disabilities and/ or autism regarding barriers and solutions they have experienced related to problem behavior, and (b) to ...

  6. Love isn't always black and white: understanding black-white interracial couples, their challenges, and their dyadic communication

    E-Print Network [OSTI]

    Wilson, Misty Michelle

    2009-05-15T23:59:59.000Z

    of their privileged position in society, whites life situations had never had necessitated that they learn about the black co-culture. The black partners also reported seeing the white community differently by understanding the nuances of racism at a deeper level...

  7. Hunter College Black Male Initiative-"Brothers for Excellence"-Summer Pipeline Programs Hunter College Black Male Initiative

    E-Print Network [OSTI]

    Qiu, Weigang

    Hunter College Black Male Initiative-"Brothers for Excellence"- Summer Pipeline Programs 1 Hunter College Black Male Initiative "Brothers for Excellence" Summer Pipeline Programs Table of Contents Page 11 Law Pipeline Programs 1 11 Graduate School, Earning a Ph.D., Conduct Research Pipeline Programs 24 16

  8. An anatomically realistic lung model for Monte Carlo-based dose calculations

    SciTech Connect (OSTI)

    Liang Liang; Larsen, Edward W.; Chetty, Indrin J. [Department of Nuclear Engineering and Radiological Sciences, University of Michigan, Ann Arbor, Michigan 48109-2104 (United States); Department of Radiation Oncology, University of Nebraska Medical Center, Omaha, Nebraska 68198-7521 (United States)

    2007-03-15T23:59:59.000Z

    Treatment planning for disease sites with large variations of electron density in neighboring tissues requires an accurate description of the geometry. This self-evident statement is especially true for the lung, a highly complex organ having structures with a wide range of sizes that range from about 10{sup -4} to 1 cm. In treatment planning, the lung is commonly modeled by a voxelized geometry obtained using computed tomography (CT) data at various resolutions. The simplest such model, which is often used for QA and validation work, is the atomic mix or mean density model, in which the entire lung is homogenized and given a mean (volume-averaged) density. The purpose of this paper is (i) to describe a new heterogeneous random lung model, which is based on morphological data of the human lung, and (ii) use this model to assess the differences in dose calculations between an actual lung (as represented by our model) and a mean density (homogenized) lung. Eventually, we plan to use the random lung model to assess the accuracy of CT-based treatment plans of the lung. For this paper, we have used Monte Carlo methods to make accurate comparisons between dose calculations for the random lung model and the mean density model. For four realizations of the random lung model, we used a single photon beam, with two different energies (6 and 18 MV) and four field sizes (1x1, 5x5, 10x10, and 20x20 cm{sup 2}). We found a maximum difference of 34% of D{sub max} with the 1x1, 18 MV beam along the central axis (CAX). A ''shadow'' region distal to the lung, with dose reduction up to 7% of D{sub max}, exists for the same realization. The dose perturbations decrease for larger field sizes, but the magnitude of the differences in the shadow region is nearly independent of the field size. We also observe that, compared to the mean density model, the random structures inside the heterogeneous lung can alter the shape of the isodose lines, leading to a broadening or shrinking of the penumbra region. For small field sizes, the mean lung doses significantly depend on the structures' relative locations to the beam. In addition to these comparisons between the random lung and mean density models, we also provide a preliminary comparison between dose calculations for the random lung model and a voxelized version of this model at 0.4x0.4x0.4 cm{sup 3} resolution. Overall, this study is relevant to treatment planning for lung tumors, especially in situations where small field sizes are used. Our results show that for such situations, the mean density model of the lung is inadequate, and a more accurate CT model of the lung is required. Future work with our model will involve patient motion, setup errors, and recommendations for the resolution of CT models.

  9. Menstrual Support for Females with Developmental Disabilities: Survey and Interview of Parents or Caretakers

    E-Print Network [OSTI]

    Park, Hye Ran

    2013-12-31T23:59:59.000Z

    ramifications of the eugenics movement, however, have proved much more durable. Simultaneously, the states interests in requiring sterilization started outweighing the rights of a person with retardation (Vitello, 1978). In addition, the various movements (de...; Williams & Nind, 1999); and for many years little research investigated the perspectives of females with developmental disabilities (Rodgers, Lipscombe, & Santer, 2006). Although several publications have addressed contraceptive management in females...

  10. Bayesian Screening Procedure for Identification of Learning Disabled Adolescents: Administration, Scoring, and Interpretation

    E-Print Network [OSTI]

    Alley, Gordon R.; Deshler, Donald D.; Warner, Michael M.

    1980-01-01T23:59:59.000Z

    disabilities). These component dis abilities (CD) include : (a) decoding words, (b) .word recognition, (c) mathematical algorithms, and (d) monitoring spelling errors. The Psychometric Batte.ry (Battery) includes subtests from five achievement measures: {a.... Insert Figure 4 about here 12 Items checked in the "No" column on the checklist are not recorded on the Answer Sheet. A slash is drawn through the item number on the answer sheet for each item on the checklist checked in the "Don't Know...

  11. Preschool English Language Learners with Disabilities: A Comparison of Recommended and Actual Language of Instruction Practices

    E-Print Network [OSTI]

    Cole, Corinna V.

    2010-07-14T23:59:59.000Z

    and Rehabilitative Services (OSERS) 27 th Annual Report to Congress (2005) states that since 1992, an 89% reduction exists in the percentage of students ages 6 through 11 receiving special education services under ?specific learning disabilities? (SLD). OSERS... also reports that starting in 1998 the new DD label appears to have de facto replaced the SLD label for children 3 through 9. As a result, the numbers of children identified with SLD have decreased as the numbers of children assigned under the DD...

  12. Coal water suspensions involving carbon black

    SciTech Connect (OSTI)

    Malone, D.P.; Thompson, D.G.

    1988-10-25T23:59:59.000Z

    This patent describes a composition comprising: about 65 to 80% by weight of coal particulates with a particle size distribution within 10% of the value calculated in accordance with a Funk distribution which assumes a maximum coal particle size of about 300 microns and minimum coal particle size of about 0.5 microns; about 0.2 to 2% by weight, as based upon the total weight of dry coal, of carbon black having a primary carbon particle size in the range of about 200 to about 900 Angstroms which primary carbon particles are simultaneously bound together to form primary reticulated chains having lengths in the range of about 500 to 30,000 Angstroms; a carrier liquid comprising 20 to 35 wt % water; and from 0.2 to 2.0 wt % of a dispersant selected from the group consisting of ammonium naphthalene sulfonic acid, hexadecyltrimethylammonium bromide, and ammonium lignosulfonate.

  13. Modeling the black hole excision problem

    SciTech Connect (OSTI)

    Szilagyi, B.; Winicour, J. [Department of Physics and Astronomy, University of Pittsburgh, Pittsburgh, Pennsylvania 15260 (United States); Albert Einstein Institute, Max Planck Gesellschaft, Am Muehlenberg 1, D-14476 Golm (Germany); Kreiss, H.-O. [Albert Einstein Institute, Max Planck Gesellschaft, Am Muehlenberg 1, D-14476 Golm (Germany); NADA, Royal Institute of Technology, 10044 Stockholm (Sweden)

    2005-05-15T23:59:59.000Z

    We analyze the excision strategy for simulating black holes. The problem is modeled by the propagation of quasilinear waves in a 1-dimensional spatial region with timelike outer boundary, spacelike inner boundary and a horizon in between. Proofs of well-posed evolution and boundary algorithms for a second differential order treatment of the system are given for the separate pieces underlying the finite-difference problem. These are implemented in a numerical code which gives accurate long term simulations of the quasilinear excision problem. Excitation of long wavelength exponential modes, which are latent in the problem, are suppressed using conservation laws for the discretized system. The techniques are designed to apply directly to recent codes for the Einstein equations based upon the harmonic formulation.

  14. Char reactions during kraft black liquor pyrolysis

    SciTech Connect (OSTI)

    Frederick, W.J.; Sricharoenchaikul, V.; Reis, V.V. [Oregon State Univ., Corvallis, OR (United States)

    1995-12-01T23:59:59.000Z

    The pyrolysis characteristics of dried black liquor particles were investigated at high heating rates in a laminar entrained-flow reactor at temperatures of 600-1100{degrees}C. Primary pyrolysis of the organic fraction occurred very rapidly, in less 0.5 seconds. Char yields at the end or volatiles evolution were 58-72%. The decreased with increasing reactor temperature to 900{degrees}C but remained constant at higher temperatures. 35-65% of the fuel nitrogen was volatilized, nearly all in less than 0.5 s. Relatively little fuel nitrogen was evolved from the char. Significant alkali metal chloride volatization from the char occurred at all temperatures, while additional sodium volatilization became important above 900{degrees}C. Reduction of sulfur species in the char increased rapidly with increasing temperature. A temperature-dependent delay time in the onset of Na{sub 2}S formation was observed.

  15. Generalized uncertainty principle and black hole thermodynamics

    E-Print Network [OSTI]

    Sunandan Gangopadhyay; Abhijit Dutta; Anirban Saha

    2014-01-08T23:59:59.000Z

    We study the Schwarzschild and Reissner-Nordstr\\"{o}m black hole thermodynamics using the simplest form of the generalized uncertainty principle (GUP) proposed in the literature. The expressions for the mass-temperature relation, heat capacity and entropy are obtained in both cases from which the critical and remnant masses are computed. Our results are exact and reveal that these masses are identical and larger than the so called singular mass for which the thermodynamics quantities become ill-defined. The expression for the entropy reveals the well known area theorem in terms of the horizon area in both cases upto leading order corrections from GUP. The area theorem written in terms of a new variable which can be interpreted as the reduced horizon area arises only when the computation is carried out to the next higher order correction from GUP.

  16. Polymeric Quantization and Black Hole Thermodynamics

    E-Print Network [OSTI]

    M. A. Gorji; Kourosh Nozari; B. Vakili

    2014-05-18T23:59:59.000Z

    Polymer quantization is a non-standard representation of the quantum mechanics that inspired by loop quantum gravity. To study the associated statistical mechanics, one needs to find microstates' energies which are eigenvalues of the Hamiltonian operator in the polymer framework. But, this is not an easy task at all since the Hamiltonian takes a nonlinear form in polymer picture. In this paper, we introduce a semiclassical method in which it is not necessary to solve the eigenvalue problem. Instead, we work with the classical Hamiltonian function and the deformed density of states in the polymeric phase space. Implementing this method, we obtain the canonical partition function for the polymerized systems and we show that our results are in good agreement with those arising from full quantum considerations. Using the partition function, we study the thermodynamics of quantum Schwarzschild black hole and we obtain corrections to the Bekenstein-Hawking entropy due to loop quantum gravity effects.

  17. The Galactic Center Black Hole Laboratory

    E-Print Network [OSTI]

    Eckart, A; Valencia-S., M; Straubmeier, C; Zensus, J A; Karas, V; Kunneriath, D; Alberdi, A; Sabha, N; Schdel, R; Puetzfeld, D

    2015-01-01T23:59:59.000Z

    The super-massive 4 million solar mass black hole Sagittarius~A* (SgrA*) shows flare emission from the millimeter to the X-ray domain. A detailed analysis of the infrared light curves allows us to address the accretion phenomenon in a statistical way. The analysis shows that the near-infrared flare amplitudes are dominated by a single state power law, with the low states in SgrA* limited by confusion through the unresolved stellar background. There are several dusty objects in the immediate vicinity of SgrA*. The source G2/DSO is one of them. Its nature is unclear. It may be comparable to similar stellar dusty sources in the region or may consist predominantly of gas and dust. In this case a particularly enhanced accretion activity onto SgrA* may be expected in the near future. Here the interpretation of recent data and ongoing observations are discussed.

  18. Horizon dynamics of distorted rotating black holes

    E-Print Network [OSTI]

    Tony Chu; Harald P. Pfeiffer; Michael I. Cohen

    2011-04-28T23:59:59.000Z

    We present numerical simulations of a Kerr black hole perturbed by a pulse of ingoing gravitational radiation. For strong perturbations we find up to five concentric marginally outer trapped surfaces. These trapped surfaces appear and disappear in pairs, so that the total number of such surfaces at any given time is odd. The world tubes traced out by the marginally outer trapped surfaces are found to be spacelike during the highly dynamical regime, approaching a null hypersurface at early and late times. We analyze the structure of these marginally trapped tubes in the context of the dynamical horizon formalism, computing the expansion of outgoing and incoming null geodesics, as well as evaluating the dynamical horizon flux law and the angular momentum flux law. Finally, we compute the event horizon. The event horizon is well-behaved and approaches the apparent horizon before and after the highly dynamical regime. No new generators enter the event horizon during the simulation.

  19. Bubbling the Newly Grown Black Ring Hair

    E-Print Network [OSTI]

    Orestis Vasilakis

    2012-02-08T23:59:59.000Z

    New families of BPS black ring solutions with four electric and four dipole magnetic charges have recently been explicitly constructed and uplifted to M-theory. These solutions were found to belong to a CFT with central charge different compared to the one of the STU model. Because of their importance to AdS/CFT, here we give the microstate description of these geometries in terms of topological bubbles and supertubes. The fourth charge results in an additional flux through the topological cycles that resolve the brane singularities. The analog of these solutions in the IIB frame yield a generalized regular supertube with three electric charges and one dipole charge. Direct comparison is also made with the previously-known bubbled geometries.

  20. Higgs Boson Production from Black Holes at the LHC

    E-Print Network [OSTI]

    Gouranga C. Nayak; J. Smith

    2006-06-09T23:59:59.000Z

    If the fundamental Planck scale is near a TeV, then TeV scale black holes should be produced in proton-proton collisions at the LHC where \\sqrt{s} = 14 TeV. As the temperature of the black holes can be ~ 1 TeV we also expect production of Higgs bosons from them via Hawking radiation. This is a different production mode for the Higgs boson, which would normally be produced via direct pQCD parton fusion processes. In this paper we compare total cross sections and transverse momentum distributions d\\sigma/dp_T for Higgs production from black holes at the LHC with those from direct parton fusion processes at next-to-next-to-leading order and next-to-leading order respectively. We find that the Higgs production from black holes can be larger or smaller than the direct pQCD production depending upon the Planck mass and black hole mass. We also find that d\\sigma/dp_T of Higgs production from black holes increases as a function of p_T which is in sharp contrast with the pQCD predictions where d\\sigma/dp_T decreases so we suggest that the measurement of an increase in d\\sigma/dp_T as p_T increases for Higgs (or any other heavy particle) production can be a useful signature for black holes at the LHC.