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Sample records for broken arrows radiological

  1. Broken Arrows: Radiological hazards from nuclear warhead accidents (the Minot USAF base nuclear weapons incident)

    CERN Document Server

    Liolios, Theodore

    2009-01-01

    According to numerous press reports, in 2007 at Minot US Air Force Base six AGM-129 Advanced Cruise Missiles mistakenly armed with W80-1 thermonuclear warheads were loaded on a B-52H heavy bomber in place of six unarmed AGM-129 missiles that were awaiting transport to Barksdale US Air Force Base for disposal. The live nuclear missiles were not reported missing, and stood unsecured and unguarded while mounted to the aircraft for a period of 36 hours. The present work investigates the radiological hazards associated with a worst-case postulated accident that would disperse the nuclear material of the six warheads in large metropolitan cities. Using computer simulations approximate estimates are derived for the ensuing cancer mortality and land contamination after the accident. Health, decontamination and evacuation costs are also estimated in the framework of the linear risk model.

  2. Environment Induced Time Arrow

    CERN Document Server

    Polonyi, Janos

    2012-01-01

    The spread of the time arrows from the environment to an observed subsystem is followed within a harmonic model. A similarity is pointed out between irreversibility and a phase with spontaneously broken symmetry. The causal structure of interaction might be lost in the irreversible case, as well. The Closed Time Path formalism is developed for classical systems and shown to handle the time arrow problem in a clear and flexible manner. The quantum case is considered, as well, and the common origin of irreversibility and decoherence is pointed out.

  3. Arrow ribbon graphs

    CERN Document Server

    Bradford, Robert; Chmutov, Sergei

    2011-01-01

    We introduce an additional structure on ribbon graphs, arrow structure. We extend the Bollob\\'as-Riordan polynomial to ribbon graph with this structure. The extended polynomial satisfies the contraction-deletion relations and naturally behaves with respect to the partial duality of ribbon graphs. We construct an arrow ribbon graph from a virtual link whose extended Bollob\\'as-Riordan polynomial specializes to the arrow polynomial of the virtual link recently introduced by H.Dye and L.Kauffman. This result generalizes the classical Thistlethwaite theorem to the arrow polynomial of virtual links.

  4. Radiology

    OpenAIRE

    Vassallo, Pierre

    2004-01-01

    Radiology is the fastest developing field of medicine and these unprecedented advances have been mainly due to improving computer technology. Digital imaging is a technology whereby images are acquired in a computer format, so that they can be easily stored and recalled for display on any computer workstation. Digital image acquisition has been used in ultrasound, computed tomography (CT) and magnetic resonance imaging (MRI) from the start. The use of digital imaging in conventional X-rays, k...

  5. A Computer's Arrow of Time

    Directory of Open Access Journals (Sweden)

    L. S. Schulman

    2005-10-01

    Full Text Available Abstract: Some researchers believe that the psychological or consciousness arrow of time is a consequence of the thermodynamic arrow. Some don't. As for many issues in this area, the disagreement revolves about fundamental and undebatable assumptions. As a contribution to this standoff I consider the extent to which a computer---presumably governed by nothing more than the thermodynamic arrow---can be said to possess a psychological arrow. My contention is that the parallels are sufficiently strong as to leave little room for an independent psychological arrow. Reservations are nevertheless expressed on the complete objectivity of the thermodynamic arrow.

  6. Broken Bones (For Parents)

    Science.gov (United States)

    ... Feeding Your 1- to 2-Year-Old Broken Bones KidsHealth > For Parents > Broken Bones Print A A ... bone fragments in place. When Will a Broken Bone Heal? Fractures heal at different rates, depending upon ...

  7. Facts about Broken Bones

    Science.gov (United States)

    ... Room? What Happens in the Operating Room? Broken Bones KidsHealth > For Kids > Broken Bones Print A A ... sticking through the skin . What Happens When a Bone Breaks? It hurts to break a bone! It's ...

  8. 77 FR 35082 - Arrow Investment Advisers, LLC and Arrow Investments Trust; Notice of Application

    Science.gov (United States)

    2012-06-12

    ... COMMISSION Arrow Investment Advisers, LLC and Arrow Investments Trust; Notice of Application June 6, 2012... order under section 6(c) of the Investment Company Act of 1940 (``Act'') for an exemption from sections... Investment Advisers, LLC (``Arrow'') and Arrow Investments Trust (the ``Trust''). Summary of...

  9. Bow-arrow interaction in archery.

    Science.gov (United States)

    Kooi, B W

    1998-11-01

    A mathematical model of the flight of the arrow during its discharge from a bow was proposed by Pekalski (1990). His description of the model was incomplete. In this paper, I give a full description of the model. Furthermore, I propose some improvements that make his model more consistent with reality. One achievement is the modelling of contact of the arrow and grip; the pressure button is modelled as a unilateral elastic support. The acceleration force acting upon the arrow during the launch is predicted by an advanced mathematical model of bow dynamics. There is a satisfactory conformity of the simulation and experimental results. The new model predicts that the arrow leaves the pressure button before it leaves the string, as reported previously. The ability to model arrow dynamics can be used to improve the adjustment of the bow-arrow system for optimal performance.

  10. Removal of broken hardware.

    Science.gov (United States)

    Hak, David J; McElvany, Matthew

    2008-02-01

    Despite advances in metallurgy, fatigue failure of hardware is common when a fracture fails to heal. Revision procedures can be difficult, usually requiring removal of intact or broken hardware. Several different methods may need to be attempted to successfully remove intact or broken hardware. Broken intramedullary nail cross-locking screws may be advanced out by impacting with a Steinmann pin. Broken open-section (Küntscher type) intramedullary nails may be removed using a hook. Closed-section cannulated intramedullary nails require additional techniques, such as the use of guidewires or commercially available extraction tools. Removal of broken solid nails requires use of a commercial ratchet grip extractor or a bone window to directly impact the broken segment. Screw extractors, trephines, and extraction bolts are useful for removing stripped or broken screws. Cold-welded screws and plates can complicate removal of locked implants and require the use of carbide drills or high-speed metal cutting tools. Hardware removal can be a time-consuming process, and no single technique is uniformly successful.

  11. Modeling Time’s Arrow

    Directory of Open Access Journals (Sweden)

    Djordje Minic

    2012-03-01

    Full Text Available Quantum gravity, the initial low entropy state of the Universe, and the problem of time are interlocking puzzles. In this article, we address the origin of the arrow of time from a cosmological perspective motivated by a novel approach to quantum gravitation. Our proposal is based on a quantum counterpart of the equivalence principle, a general covariance of the dynamical phase space. We discuss how the nonlinear dynamics of such a system provides a natural description for cosmological evolution in the early Universe. We also underscore connections between the proposed non-perturbative quantum gravity model and fundamental questions in non-equilibrium statistical physics.

  12. Environmental and Molecular Science Laboratory Arrow

    Energy Technology Data Exchange (ETDEWEB)

    2016-06-24

    Arrows is a software package that combines NWChem, SQL and NOSQL databases, email, and social networks (e.g. Twitter, Tumblr) that simplifies molecular and materials modeling and makes these modeling capabilities accessible to all scientists and engineers. EMSL Arrows is very simple to use. The user just emails chemical reactions to arrows@emsl.pnnl.gov and then an email is sent back with thermodynamic, reaction pathway (kinetic), spectroscopy, and other results. EMSL Arrows parses the email and then searches the database for the compounds in the reactions. If a compound isn't there, an NWChem calculation is setup and submitted to calculate it. Once the calculation is finished the results are entered into the database and then results are emailed back.

  13. Illustrating cerebral function: the iconography of arrows.

    Science.gov (United States)

    Schott, G D

    2000-12-29

    For over a century the arrow has appeared in illustrations of cerebral function, yet the implications of using such symbols have not been previously considered. This review seeks to outline the nature, evolution, applications and limitations of this deceptively simple graphic device when it is used to picture functions of the brain. The arrow is found to have been used in several different ways: as a means of endowing anatomical structures with functional properties; as a method of displaying neural function either in free-standing form or in a structural or spatial framework; as a device for correlating functional data with underlying brain topography; and as a technique for linking functions of the brain with the world outside and with various philosophical concepts. For many of these uses the essential feature of the arrow is its directional characteristic. In contrast to the line, it is direction that enables the arrow to display information about time, which in turn can be exploited to depict functional rather than structural data. However, the use of the arrow is fraught with difficulties. It is often unclear whether an arrow has been used to illustrate fact, hypothesis, impression or possibility, or merely to provide a decorative flourish. Furthermore, the powerful symbolic nature of the arrow can so easily confer a spurious validity on the conjectural. Increasingly now there are insuperable difficulties when attempting to illustrate complex mechanisms of brain function. In the iconography of cerebral function, therefore, arrows with all their ambiguities may in certain circumstances become superseded by more non-representational symbols such as the abstract devices of the computational neuroscientist.

  14. Cosmological arrow of time in f(R) gravity

    CERN Document Server

    Yadav, Bal Krishna

    2016-01-01

    The cosmological arrow of time may be linked to the thermodynamic arrow by second law of thermodynamics. The time asymmetry is also associated with dissipative fluid as Tolman introduced a viscous fluid to generate an arrow of time in cyclic cosmology. An arrow of time in cyclic cosmology has been shown using scalar field.In this work we find out the cosmological arrow of time in f(R) gravity. Here we use the relation between a new scalar field and $f(R)$. The dynamics of this new scalar field may emerge the arrow of time.

  15. Weakly broken galileon symmetry

    Energy Technology Data Exchange (ETDEWEB)

    Pirtskhalava, David [Scuola Normale Superiore, Piazza dei Cavalieri 7, 56126 Pisa (Italy); Santoni, Luca; Trincherini, Enrico [Scuola Normale Superiore, Piazza dei Cavalieri 7, 56126 Pisa (Italy); INFN, Sezione di Pisa, Piazza dei Cavalieri 7, 56126 Pisa (Italy); Vernizzi, Filippo [Institut de Physique Théorique, Université Paris Saclay, CEA, CNRS, Gif-sur-Yvette cédex, F-91191 (France)

    2015-09-01

    Effective theories of a scalar ϕ invariant under the internal galileon symmetryϕ→ϕ+b{sub μ}x{sup μ} have been extensively studied due to their special theoretical and phenomenological properties. In this paper, we introduce the notion of weakly broken galileon invariance, which characterizes the unique class of couplings of such theories to gravity that maximally retain their defining symmetry. The curved-space remnant of the galileon’s quantum properties allows to construct (quasi) de Sitter backgrounds largely insensitive to loop corrections. We exploit this fact to build novel cosmological models with interesting phenomenology, relevant for both inflation and late-time acceleration of the universe.

  16. Electromyography of arrow release in archery.

    Science.gov (United States)

    Hennessy, M P; Parker, A W

    1990-01-01

    An electronic arrow movement detector was used to accurately locate the muscle activity associated with release of the arrow during shooting in archery. Digital computer analysis of the electromyograms from thirty shots for two archers facilitated an examination of the relationship between the measured activity of the muscles and their function during release. Changes present in the direct and integrated electromyograms of muscles acting at the wrist and elbow joints of the bow arm and the shoulder of the draw arm tended to anticipate the moment of arrow release. These changes would produce muscular force to reduce unwanted movement at this critical phase of the shot in the bow arm and initiate release of the bow string by the fingers. This study provides a detailed quantitative analysis of the muscular action of the technique and identifies possibilities for prevention of injury by improving the understanding of muscle action in shooting.

  17. Entanglement and the Thermodynamic Arrow of Time

    CERN Document Server

    Jennings, David

    2010-01-01

    We discuss quantum entanglement in the context of the thermodynamic arrow of time. We review the role of correlations in entropy-decreasing events and prove that the occurrence of a transformation between two thermodynamic states constitutes a new type of entanglement witness, one not defined as a separating plane in state space between separable and entangled states, but as a physical process dependent on the local initial properties of the states. Extending work by Partovi, we consider a general entangled multipartite system that allows large reversals of the thermodynamic arrow of time. We describe a hierarchy of arrows that arises from the different correlations allowed in a quantum state and examine these features in the context of Maxwell's Demon. We examine in detail the case of three qubits, and also propose some simple experimental demonstrations possible with small numbers of qubits.

  18. On the mechanics of the arrow : Archer's paradox

    NARCIS (Netherlands)

    Kooi, BW; Sparenberg, JA

    1997-01-01

    In ancient bows the grip of the bow was in the way of the arrow. The arrow needed to get round the bow while being accelerated; this phenomenon is called the 'Archer's Paradox'. In the forties it was observed experimentally with high-speed cameras that the arrow vibrates in a horizontal plane perpen

  19. How Cryptosystems Get Broken

    Institute of Scientific and Technical Information of China (English)

    Adi Shamir

    2009-01-01

    @@ It's all us pleasure to come to China.a great deal of cheerful times already.I hope that we have additional opportunity to meet,talk about cryptography and other components.Today I am going to give a general talk which is not designed for special lists,about how could the systems get broken like this.I think I don't assume you know much about cryptography and some of the basics.Cryptography deals with issue how to send secret information from a sender which is usually called Alice.to a receiver which is usually called Bob.The usual way how to encrypt data is to use an encryption box that accepts the plaintext,the plaintext is the message that you would like to send encrypted.It could be just"Good morning".By using a secret cryptographic key K,you put ciphertext which looks very very strange."zqvkj…".

  20. Tragic Paradox in Achebe's "Arrow of God"

    Science.gov (United States)

    Soile, Sola

    1976-01-01

    Leads into a discussion of Chinua Achebe's "Arrow of God" (1964) from his earlier novel "Things Fall Apart" (1958), because such a comparative approach provides an opportunity to see Achebe's elaboration and development of a subject that is obviously dear to his heart, namely, the trials and tribulations of a dynamic society as…

  1. Remote effects in real induction arrows

    Directory of Open Access Journals (Sweden)

    A. Ádám

    2002-06-01

    Full Text Available In August 2001, Annali di Geofisica, 44 (4, pp. 659-669, published the paper: «Anomalous directional behaviour of the real parts of the induction arrows in the Eastern Alps: tectonic and palaeogeographic implications» written by Marcus Gurk and Pierre-André Schnegg. Concerning this paper we have two brief comments.

  2. The affordances of broken affordances

    DEFF Research Database (Denmark)

    Grünbaum, Martin Gielsgaard; Simonsen, Jakob Grue

    2015-01-01

    important: how users may (i) achieve their goals in the presence of such broken affordances, and may (ii) repurpose or otherwise interact with artefacts with broken affordances. We argue that (A) thorough analyses of breakdowns of affordances and their associated signifiers and feedbacks have implication...

  3. Multi-Stage Programs are Generalized Arrows

    CERN Document Server

    Megacz, Adam

    2010-01-01

    The lambda calculus, subject to typing restrictions, provides a syn- tax for the internal language of cartesian closed categories. This paper establishes a parallel result: staging annotations, subject to named level restrictions, provide a syntax for the internal language of Freyd categories, which are known to be in one-to-one correspondence with Arrows. The connection is made by interpreting multi-stage type systems as indexed functors from polynomial categories to their reindexings (Definitions 15 and 16). This result applies only to multi-stage languages which are (1) homogeneous, (2) allow cross-stage persistence and (3) place no restrictions on the use of structural rules in typing derivations. Removing these restrictions and repeating the construction yields generalized arrows, of which Arrows are a particular case. A translation from well-typed multi-stage programs to single-stage GArrow terms is provided. The translation is defined by induction on the structure of the proof that the multi-stage prog...

  4. Radiological English

    Energy Technology Data Exchange (ETDEWEB)

    Ribes, R. [Hospital Reina Sofia, Cordoba (Spain). Servicio de Radiologia; Ros, P.R. [Harvard Medical School, Boston, MA (United States). Div. of Radiology

    2007-07-01

    The book is an introductory book to radiological English on the basis that there are a lot of radiologists, radiology residents, radiology nurses, radiology students, and radiographers worldwide whose English level is indeterminate because their reading skills are much higher than their fluency. It is intended to help those health care professionals who need English for their work but do not speak English on a day-to-day basis. (orig.)

  5. Broken Bones, Sprains, and Strains (For Parents)

    Science.gov (United States)

    ... Feeding Your 1- to 2-Year-Old Broken Bones, Sprains, and Strains KidsHealth > For Parents > Broken Bones, ... home. What to Do: For a Suspected Broken Bone: Do not move a child whose injury involves ...

  6. Distal Radius Fracture (Broken Wrist)

    Science.gov (United States)

    .org Distal Radius Fracture (Broken Wrist) Page ( 1 ) The radius is the larger of the two bones of the forearm. The ... the distal end. A fracture of the distal radius occurs when the area of the radius near ...

  7. Broken toe - self-care

    Science.gov (United States)

    Fractured toe - self-care; Broken bone - toe - self-care; Fracture - toe - self-care; Fracture phalanx - toe ... often treated without surgery and can be taken care of at home. Severe injuries include: Breaks that ...

  8. Job loss and broken partnerships

    DEFF Research Database (Denmark)

    Kriegbaum, Margit; Christensen, Ulla; Lund, Rikke;

    2008-01-01

    The aim of this study was to investigate the effects of the accumulated number of job losses and broken partnerships (defined as the end of cohabitation) on the risk of fatal and nonfatal events of ischemic heart disease (IHD).......The aim of this study was to investigate the effects of the accumulated number of job losses and broken partnerships (defined as the end of cohabitation) on the risk of fatal and nonfatal events of ischemic heart disease (IHD)....

  9. On the time arrows, and randomness in cosmological signals

    CERN Document Server

    Gurzadyan, V G; Yegorian, G

    2013-01-01

    Arrows of time - thermodynamical, cosmological, electromagnetic, quantum mechanical, psychological - are basic properties of Nature. For a quantum system-bath closed system the de-correlated initial conditions and no-memory (Markovian) dynamics are outlined as necessary conditions for the appearance of the thermodynamical arrow. The emergence of the arrow for the system evolving according to non-unitary dynamics due to the presence of the bath, then, is a result of limited observability, and we conjecture the arrow in the observable Universe as determined by the dark sector acting as a bath. The voids in the large scale matter distribution induce hyperbolicity of the null geodesics, with possible observational consequences.

  10. Radiology fundamentals

    CERN Document Server

    Singh, Harjit

    2011-01-01

    ""Radiology Fundamentals"" is a concise introduction to the dynamic field of radiology for medical students, non-radiology house staff, physician assistants, nurse practitioners, radiology assistants, and other allied health professionals. The goal of the book is to provide readers with general examples and brief discussions of basic radiographic principles and to serve as a curriculum guide, supplementing a radiology education and providing a solid foundation for further learning. Introductory chapters provide readers with the fundamental scientific concepts underlying the medical use of imag

  11. Arrows of time in unconfined systems

    CERN Document Server

    Barbour, Julian

    2016-01-01

    Entropy and the second law of thermodynamcs were discovered through study of the behaviour of gases in confined spaces. The related techniques developed in the kinetic theory of gases have failed to resolve the apparent conflict between the time-reversal symmetry of all known laws of nature and the existence of arrows of time that at all times and everywhere in the universe all point in the same direction. I will argue that the failure may due to unconscious application to the universe of the conceptual framework developed for confined systems. If, as seems plausible, the universe is an unconfined system, new concepts are needed.

  12. Radiology illustrated. Pediatric radiology

    Energy Technology Data Exchange (ETDEWEB)

    Kim, In-One (ed.) [Seoul National Univ. College of Medicine (Korea, Republic of). Dept. of Radiology

    2014-11-01

    Depicts characteristic imaging findings of common and uncommon diseases in the pediatric age group. Will serve as an ideal diagnostic reference in daily practice. Offers an excellent teaching aid, with numerous high-quality illustrations. This case-based atlas presents images depicting the findings typically observed when imaging a variety of common and uncommon diseases in the pediatric age group. The cases are organized according to anatomic region, covering disorders of the brain, spinal cord, head and neck, chest, cardiovascular system, gastrointestinal system, genitourinary system, and musculoskeletal system. Cases are presented in a form resembling teaching files, and the images are accompanied by concise informative text. The goal is to provide a diagnostic reference suitable for use in daily routine by both practicing radiologists and radiology residents or fellows. The atlas will also serve as a teaching aide and a study resource, and will offer pediatricians and surgeons guidance on the clinical applications of pediatric imaging.

  13. Multi-Level Languages are Generalized Arrows

    CERN Document Server

    Megacz, Adam

    2010-01-01

    The lambda calculus, subject to typing restrictions, provides a syntax for the internal language of cartesian closed categories. This paper establishes a parallel result: staging annotations, subject to named level restrictions, provide a syntax for the internal language of (the codomain of) a functor which preserves a premonoidal enrichment. Such functors are uniquely determined by functors from an {\\it enriching} category to an {\\it enriched} category. An equational axiomatization for the latter form is given, and Arrows are shown to constitute a special case. This result is most useful when the enrichment is that of a category of types and terms in a category of judgments. In such a scenario, the proof of correspondence yields a translation from well typed multi-level terms to well typed one-level terms which are parameterized over an instance of a {\\it generalized arrow} (GArrow). The translation is defined by induction on the structure of the proof that the multi-level program is well typed, relying on i...

  14. MRI of menisci repaired with bioabsorbable arrows

    Energy Technology Data Exchange (ETDEWEB)

    Mustonen, Antti O.T.; Kiuru, Martti; Koskinen, Seppo K. [Helsinki University Hospital - Radiology, Helsinki (Finland); Tielinen, Laura; Lindahl, Jan; Hirvensalo, Eero [Helsinki University Hospital - Traumatology, Helsinki (Finland)

    2006-07-15

    To analyze with conventional magnetic resonance imaging (MRI) the signal appearance of menisci repaired with bioabsorbable arrows. Forty-four patients with 47 meniscal tears treated with bioabsorbable arrows underwent follow-up conventional MRI examination. The time interval between the surgery and MRI varied from 5 to 67 months (mean 26 months). Twenty-six patients also had concurrent repair of torn anterior cruciate ligament. The following grades were used to classify meniscal signal intensity: (a) G0; low signal intensity on all sequences and regular configuration in every plane, (b) G1; increased signal intensity within the meniscus, not extending to the meniscal surface, (c) G2; increased signal intensity linear in shape, which may or may not communicate with the capsular margin of the meniscus, without extending to the meniscal surface, and (d) G3; increased signal intensity extending to the meniscal surface. Thirteen menisci (27.5%) had normal signal intensity, 13 menisci (27.5%) Grade 1 signal intensity, 9 menisci (19%) Grade 2 signal intensity and 12 menisci (26%) Grade 3 signal intensity. The time difference between operation and MRI was statistically significant between the G0 (36 months) and G3 groups (14 months; P=0.0288). There was no statistical significance in different grades between medial and lateral meniscus or between patients with operated or intact ACL. On physical examination sixteen patients reported slight symptoms, seen evenly in each group. (orig.)

  15. The sacred weapon: bow and arrow combat in Iran

    Directory of Open Access Journals (Sweden)

    Manouchehr Moshtagh Khorasani

    2012-07-01

    Full Text Available The following article presents the development of the bow and arrow, and its important role in the history of Iran. The bow always played an important role not only on the battlefield, but also in hunting. It was also considered as a sacred weapon and additionally a royal symbol. Bow and arrow were considered as a superior weapon in comparison with other types of weapons because one could fight with them at a safer distance as one offered by swords, maces and axes. The first part of the article presents a short history of the bow in Iran. Based on historical Persian manuscripts, the next part explains the structure of the composite bow and the materials used for making it. The third part describes some types of bows based on the material, place of production, the usage, and bow type based on the length of the bow and the arrows. The following part talks about different types of arrows based on morphology of arrowheads, the type of plume/feather, the material of the shaft, the material of the arrowhead, the length of arrows, the target of arrows, the place of production of arrowheads and terms for describing its different features of an arrowhead. Then, the article talks about different types of thumb rings, bowstrings, quivers and bow cases and arrow guides for shooting short arrows. The next part discusses different principles of archery as explained in Persian manuscripts. Finally the article describes different archery targets.

  16. Probability of intrinsic time-arrow from information loss

    CERN Document Server

    Diósi, L

    2004-01-01

    Time-arrow $s=+/-$, intrinsic to a concrete physical system, is associated with the direction of information loss $\\Delta I$ displayed by the random evolution of the given system. When the information loss tends to zero the intrinsic time-arrow becomes uncertain. We propose the heuristic relationship $1/[1+exp(-s\\Delta I)]$ for the probability of the intrinsic time-arrow. The main parts of the present work are trying to confirm this heuristic equation. The probability of intrinsic time arrow is defined by Bayesian inference from the observed random process. From irreversible thermodynamic systems, the proposed heuristic probabilities follow via the Gallavotti-Cohen relations between time-reversed random processes. In order to explore the underlying microscopic mechanism, a trivial microscopic process is analyzed and an obvious discrepancy is identified. It can be resolved by quantum theory. The corresponding trivial quantum process will exactly confirm the proposed heuristic time-arrow probability.

  17. Probability of Intrinsic Time-Arrow from Information Loss

    Science.gov (United States)

    Diósi, Lajos

    Time-arrow s=±, intrinsic to a concrete physical system, is associated with the direction of information loss I displayed by the random evolution of the given system. When the information loss tends to zero the intrinsic time-arrow becomes uncertain. We propose the heuristic relationship for the probability of the intrinsic time-arrow. The main parts of the present work are trying to confirm this heuristic equation. The probability of intrinsic time arrow is defined by Bayesian inference from the observed random process. From irreversible thermodynamic systems, the proposed heuristic probabilities follow via the Gallavotti-Cohen relations between time-reversed random processes. In order to explore the underlying microscopic mechanism, a trivial microscopic process is analyzed and an obvious discrepancy is identified. It can be resolved by quantum theory. The corresponding trivial quantum process will exactly confirm the proposed heuristic time-arrow probability.

  18. Imaging and radiology

    Science.gov (United States)

    Interventional radiology; Diagnostic radiology; X-ray imaging ... DIAGNOSTIC RADIOLOGY Diagnostic radiology helps health care professionals see structures inside your body. Doctors that specialize in the interpretation ...

  19. Study of the decays D r arrow K 3. pi

    Energy Technology Data Exchange (ETDEWEB)

    Anjos, J.C.; Appel, J.A.; Bean, A.; Bracker, S.B.; Browder, T.E.; Cremaldi, L.M.; Duboscq, J.E.; Elliott, J.R.; Escobar, C.O.; Gibney, M.C.; Hartner, G.F.; Huber, J.; Karchin, P.E.; Kumar, B.R.; Losty, M.J.; Luste, G.J.; Mantsch, P.M.; Martin, J.F.; McHugh, S.; Menary, S.R.; Morrison, R.J.; Nash, T.; Pinfold, J.; Punkar, G.; Purohit, M.V.; Ross, W.R.; Santoro, A.F.S.; Schmidt, D.M.; Shoup, A.L.; Sliwa, K.; Sokoloff, M.D.; Souza, M.H.G.; Sperka, D.; Spalding, W.J.; Streetman, M.E.; Stundzia, A.B.; Witherell, M.S. (University of California, Santa Barbara, California, 93106 (United States) Carleton University, Ottawa, Ontario, Canada K1S5B6 ( ) Centro Brasileiro de Pesquisas Fisicas, Rio de Janeiro (Brazil) University of Cincinnati, Cincinnati, Ohio 45221 (United States) University of Colorado, Boulder, Colorado 80309 (United States) Fermi National Accelerator Laboratory, Batavia, Illinois 60510 (United States) University of Mississippi, Oxford, Mississippi 38677 (United States) Nation

    1992-09-01

    We report measurements of the decays {ital D}{sup 0}{r arrow}{ital K}{sup {minus}}{pi}{sup +}{pi}{sup +}{pi}{sup {minus}}, {ital D}{sup +}{r arrow}{ital {bar K}}{sup 0}{pi}{sup +}{pi}{sup +}{pi}{sup {minus}}, {ital D}{sup +}{r arrow}{ital K}{sup {minus}}{pi}{sup +}{pi}{sup +}{pi}{sup 0}, and {ital D}{sup 0}{r arrow}{ital {bar K}}{sup 0}{pi}{sup +}{pi}{sup {minus}}{pi}{sup 0} from Fermilab photoproduction experiment E691. A complete resonant substructure analysis is used to determine the relative fractions and phases of amplitudes contributing to the decays {ital D}{sup 0}{r arrow}{ital K}{sup {minus}}{pi}{sup +}{pi}{sup +}{pi}{sup {minus}}, {ital D}{sup +}{r arrow}{ital {bar K}}{sup 0}{pi}{sup +}{pi}{sup +}{pi}{sup {minus}}, and {ital D}{sup +}{r arrow}{ital K}{sup {minus}}{pi}{sup +}{pi}{sup +}{pi}{sup 0}.

  20. Learning about Locomotion Patterns: Effective Use of Multiple Pictures and Motion-Indicating Arrows

    Science.gov (United States)

    Imhof, Birgit; Scheiter, Katharina; Edelmann, Jorg; Gerjets, Peter

    2013-01-01

    This study investigated how enriching visualizations with arrows indicating the motion of objects may help in conveying dynamic information: Multiple static-simultaneous visualizations with motion-indicating arrows were compared with either multiple visualizations without arrows or a single visualization with arrows. Seventy-one students were…

  1. Invariants of broken discrete symmetries

    OpenAIRE

    Kalozoumis, P.; Morfonios, C.; Diakonos, F. K.; Schmelcher, P.

    2014-01-01

    The parity and Bloch theorems are generalized to the case of broken global symmetry. Local inversion or translation symmetries are shown to yield invariant currents that characterize wave propagation. These currents map the wave function from an arbitrary spatial domain to any symmetry-related domain. Our approach addresses any combination of local symmetries, thus applying in particular to acoustic, optical and matter waves. Nonvanishing values of the invariant currents provide a systematic ...

  2. Invariants of broken discrete symmetries

    CERN Document Server

    Kalozoumis, P; Diakonos, F K; Schmelcher, P

    2014-01-01

    The parity and Bloch theorems are generalized to the case of broken global symmetry. Local inversion or translation symmetries are shown to yield invariant currents that characterize wave propagation. These currents map the wave function from an arbitrary spatial domain to any symmetry-related domain. Our approach addresses any combination of local symmetries, thus applying in particular to acoustic, optical and matter waves. Nonvanishing values of the invariant currents provide a systematic pathway to the breaking of discrete global symmetries.

  3. Relation between the psychological and thermodynamic arrows of time

    Science.gov (United States)

    Mlodinow, Leonard; Brun, Todd A.

    2014-05-01

    In this paper we lay out an argument that generically the psychological arrow of time should align with the thermodynamic arrow of time where that arrow is well defined. This argument applies to any physical system that can act as a memory, in the sense of preserving a record of the state of some other system. This result follows from two principles: the robustness of the thermodynamic arrow of time to small perturbations in the state, and the principle that a memory should not have to be fine-tuned to match the state of the system being recorded. This argument applies even if the memory system itself is completely reversible and nondissipative. We make the argument with a paradigmatic system, and then formulate it more broadly for any system that can be considered a memory. We illustrate these principles for a few other example systems and compare our criteria to earlier treatments of this problem.

  4. On the time arrows, and randomness in cosmological signals

    Directory of Open Access Journals (Sweden)

    Gurzadyan V.G.

    2013-09-01

    Full Text Available Arrows of time - thermodynamical, cosmological, electromagnetic, quantum mechanical, psychological - are basic properties of Nature. For a quantum system-bath closed system the de-correlated initial conditions and no-memory (Markovian dynamics are outlined as necessary conditions for the appearance of the thermodynamical arrow. The emergence of the arrow for the system evolving according to non-unitary dynamics due to the presence of the bath, then, is a result of limited observability, and we conjecture the arrow in the observable Universe as determined by the dark sector acting as a bath. The voids in the large scale matter distribution induce hyperbolicity of the null geodesics, with possible observational consequences.

  5. ARROW (Version 2) Commercial Software Validation and Configuration Control

    Energy Technology Data Exchange (ETDEWEB)

    HEARD, F.J.

    2000-02-10

    ARROW (Version 2), a compressible flow piping network modeling and analysis computer program from Applied Flow Technology, was installed for use at the U.S. Department of Energy Hanford Site near Richland, Washington.

  6. Invariants of Broken Discrete Symmetries

    Science.gov (United States)

    Kalozoumis, P. A.; Morfonios, C.; Diakonos, F. K.; Schmelcher, P.

    2014-08-01

    The parity and Bloch theorems are generalized to the case of broken global symmetry. Local inversion or translation symmetries in one dimension are shown to yield invariant currents that characterize wave propagation. These currents map the wave function from an arbitrary spatial domain to any symmetry-related domain. Our approach addresses any combination of local symmetries, thus applying, in particular, to acoustic, optical, and matter waves. Nonvanishing values of the invariant currents provide a systematic pathway to the breaking of discrete global symmetries.

  7. Ritual of the Broken Stone

    OpenAIRE

    Bel, Bernard

    2011-01-01

    This “ritual of the broken stone” was performed in July 1996 to celebrate an auspicious event in a private house of Choglamsar, a settlement of Tibetan migrates in a suburb of Leh (Ladakh, India). According to local informants, its performers were ermits living in caves of Spiti. Most astonishing is the mixture of a religious ritual with comical scenes and demonstrations of 'magical' powers. Este “ritual de la piedra rota“ se llevó a cabo en julio de 1996 para celebrar un acontecimiento au...

  8. Broken Windows and Collective Efficacy

    Directory of Open Access Journals (Sweden)

    Aldrin Abdullah

    2015-01-01

    Full Text Available The broken windows thesis posits that signs of disorder increase crime and fear, both directly and indirectly. Although considerable theoretical evidence exists to support the idea that disorder is positively related to fear of crime, the empirical literature on examining the indirect effect of the individual’s perception of incivilities on fear of crime is limited, especially in developing countries. This research was conducted to assess the indirect relationship between perceived disorder and fear of crime through collective efficacy. A total of 235 households from Penang, Malaysia, participated in this study. Results reveal that high perception of disorder is negatively associated with collective efficacy. High collective efficacy is associated with low fear of crime. Moreover, a significant and indirect effect of disorder on fear of crime exists through collective efficacy. The results provide empirical support for the broken windows theory in the Malaysian context and suggest that both environmental conditions and interactions of residents play a role in the perceived fear of crime.

  9. Interventional radiology

    Energy Technology Data Exchange (ETDEWEB)

    Steinbrich, W. (ed.) (Basel Univ. (Switzerland). Inst. fuer Medizinische Radiologie); Gross-Fengels, W. (ed.) (Allgemeines Krankenhaus Harburg, Hamburg (Germany). Abt. fuer Klinische Radiologie)

    1993-01-01

    In interventional radiology adjunctive medical therapy can increase patient's comfort, and should further reduce the risks of the procedures. In order to fulfill the responsibility of the interventionist to the patients and to increase the success rate of the interventions, a profound knowledge of certain drugs is indispensable. This includes, for example, sedatives, analgesics, cardiovascular drugs and agents to prevent infections, thromboembolic complications or restenoses. Moreover, a good monitoring system during complex procedures will increase the safety of radiological interventions. These topics and several more are presented in this book. (orig.). 32 figs.

  10. New technique for withdrawing broken sheath

    Directory of Open Access Journals (Sweden)

    Süleyman Cagan Efe

    2016-03-01

    Full Text Available A sheath that is broken inside vessel is a rare complication, and intravascular fragments from broken sheaths are retrieving transcutaneously by techniques including the loop snare catheter, basket catheter, and grasping/biopsy forceps. We reported a less common type of broken central venous sheath in location and a successful unique technique for retrieving it from subclavian vein by using noncompliant balloon from 40 year old female patient.

  11. Modeling of the Archery Bow and Arrow Vibrations

    Directory of Open Access Journals (Sweden)

    I. Zaniewski

    2009-01-01

    Full Text Available Vibration processes in the compound and open kinematical chain with an external link, as a model of an archery bow and arrow system, are evaluated. A mechanical and mathematical model of bend oscillations of the system during accelerate motion of the external link is proposed. Correlation between longitudinal acceleration and natural frequencies is obtained. There are recommendations regarding determination of virtual forms to study arrow vibrations and buckling. The models and methods have been adapted for realization into the engineering method using well-known mathematical software packages.

  12. Universal arrows to forgetful functors from categories of topological algebra

    CERN Document Server

    Pestov, V G

    1992-01-01

    We survey the present trends in theory of universal arrows to forgetful functors from various categories of topological algebra and functional analysis to categories of topology and topological algebra. Among them are free topological groups, free locally convex spaces, free Banach-Lie algebras, and much more. An accent is put on relationship of those constructions with other areas of mathematics and their possible applications. A number of open problems is discussed; some of them belong to universal arrow theory, and others may hopefully become amenable to methods of this theory.

  13. Environment induced time arrow and the Closed Time Path method

    Science.gov (United States)

    Polonyi, Janos

    2013-06-01

    It is shown in the framework of a harmonic system that the thermodynamical time arrow is induced by the environmental initial conditions in a manner similar to spontaneous symmetry breaking. The Closed Time Path formalism is introduced in classical mechanics to handle Green functions for initial condition problems by the action principle, in a systematic manner. The application of this scheme for quantum systems shows the common dynamical origin of the thermodynamical and the quantum time arrows. It is furthermore conjectured that the quantum-classical transition is strongly coupled.

  14. Arrow y Sen: el rescate del individuo y de las instituciones Arrow and Sen: rescuing the individual and institutions

    OpenAIRE

    Cante Freddy

    1998-01-01

    La teoría de la elección social que propone Arrow y Sen es una ruptura con los desarrollos hegemónicos de la microeconomía y de la macroeconomía en dos sentidos: rescata la diversidad de gustos y valores de cada individuo en oposición a los conceptos agregados; además, muestra que la conducta racional es quizás lo menos importante con lo que abre un diálogo con la economía institucional.The theory of social choice proposed by Arrow and Sen breaks with the hegemonic developments of microeconom...

  15. 49 CFR 230.39 - Broken staybolts.

    Science.gov (United States)

    2010-10-01

    ..., DEPARTMENT OF TRANSPORTATION STEAM LOCOMOTIVE INSPECTION AND MAINTENANCE STANDARDS Boilers and Appurtenances Staybolts § 230.39 Broken staybolts. (a) Maximum allowable number of broken staybolts. No boiler shall be... inside the firebox or combustion chamber on a straight line. No boiler shall be allowed to remain...

  16. Adding and Subtracting Vectors: The Problem with the Arrow Representation

    Science.gov (United States)

    Heckler, Andrew F.; Scaife, Thomas M.

    2015-01-01

    A small number of studies have investigated student understanding of vector addition and subtraction in generic or introductory physics contexts, but in almost all cases the questions posed were in the vector arrow representation. In a series of experiments involving over 1000 students and several semesters, we investigated student understanding…

  17. Entropy, biological evolution and the psychological arrow of time

    CERN Document Server

    Heinrich, Torsten; Päs, Heinrich

    2014-01-01

    We argue that in Universes where future and past differ only by the entropy content a psychological arrow of time pointing in the direction of entropy increase can arise from natural selection in biological evolution. We show that this effect can be demonstrated in very simple toy computer simulations of evolution in an entropy increasing or decreasing environment.

  18. Does quantum electrodynamics have an arrow of time?

    NARCIS (Netherlands)

    Atkinson, David

    2006-01-01

    Quantum electrodynamics is a time-symmetric theory that is part of the electroweak interaction, which is invariant under a generalized form of this symmetry, the PCT transformation. The thesis is defended that the arrow of time in electrodynamics is a consequence of the assumption of an initial stat

  19. Arrow Lakes Reservoir Fertilization Experiment, Technical Report 1999-2004.

    Energy Technology Data Exchange (ETDEWEB)

    Schindler, E.

    2007-02-01

    The Arrow Lakes food web has been influenced by several anthropogenic stressors during the past 45 years. These include the introduction of mysid shrimp (Mysis relicta) in 1968 and 1974 and the construction of large hydroelectric impoundments in 1969, 1973 and 1983. The construction of the impoundments affected the fish stocks in Upper and Lower Arrow lakes in several ways. The construction of Hugh Keenleyside Dam (1969) resulted in flooding that eliminated an estimated 30% of the available kokanee spawning habitat in Lower Arrow tributaries and at least 20% of spawning habitat in Upper Arrow tributaries. The Mica Dam (1973) contributed to water level fluctuations and blocked upstream migration of all fish species including kokanee. The Revelstoke Dam (1983) flooded 150 km of the mainstem Columbia River and 80 km of tributary streams which were used by kokanee, bull trout, rainbow trout and other species. The construction of upstream dams also resulted in nutrient retention which ultimately reduced reservoir productivity. In Arrow Lakes Reservoir (ALR), nutrients settled out in the Revelstoke and Mica reservoirs, resulting in decreased productivity, a process known as oligotrophication. Kokanee are typically the first species to respond to oligotrophication resulting from aging impoundments. To address the ultra-oligotrophic status of ALR, a bottom-up approach was taken with the addition of nutrients (nitrogen and phosphorus in the form of liquid fertilizer from 1999 to 2004). Two of the main objectives of the experiment were to replace lost nutrients as a result of upstream impoundments and restore productivity in Upper Arrow and to restore kokanee and other sport fish abundance in the reservoir. The bottom-up approach to restoring kokanee in ALR has been successful by replacing nutrients lost as a result of upstream impoundments and has successfully restored the productivity of Upper Arrow. Primary production rates increased, the phytoplankton community responded

  20. Search for the decays {eta}{r_arrow}{mu}{ital e} and {eta}{r_arrow}{ital e}{sup +}{ital e}{sup {minus}}

    Energy Technology Data Exchange (ETDEWEB)

    White, D.B.; Tippens, W.B.; Abegg, R.; Baldisseri, A.; Boudard, A.; Briscoe, W.; Fabbro, B.; Garcon, M.; Hermes, E.A.; Jacobs, W.W.; Kessler, R.S.; Lytkin, L.; Mayer, B.; Nefkens, B.M.; Niebuhr, C.; Petrov, A.M.; Poitou, J.; Saudinos, J.; Tomasi-Gustafsson, E.; van der Schaaf, A.; van Oers, W.T.; Vigdor, S.E.; Wang, M. [UCLA Department of Physics, Los Angeles, California 90024-1547 (United States)]|[TRIUMF, 4004 Wesbrook Mall, Vancouver, British Columbia, Canada V6TH2A3]|[Service de Physique Nucleaire, CEA-Saclay, 91191 Gif-sur-Yvette (France)]|[Center for Nuclear Studies and Department of Physics, George Washington University, Washington, D.C., 20052 (United States)]|[Physik-Institut der Universitaet Zuerich, CH-8001 Zuerich (Switzerland)]|[Laboratoire National Saturne, F-91191 Gif-sur-Yvette (France)]|[Indiana University Cyclotron Facility, 2401 Milo B. Sampson Lane, Bloomington, Indiana 47405 (United States)]|[Joint Institute for Nuclear Research, Laboratory of Nuclear Problems, 141980 Dubna, Moscow District (Russia)

    1996-06-01

    A search for the lepton-family-violating decay {eta}{r_arrow}{mu}{ital e} and the rare decay {eta}{r_arrow}{ital e}{sup +}{ital e}{sup {minus}} yields the following branching ratio ({ital B}) upper limits at a 90{percent} confidence level: {ital B}({eta}{r_arrow}{mu}{ital e}){lt}6{times}10{sup {minus}6} and {ital B}({eta}{r_arrow}{ital e}{sup +}{ital e}{sup {minus}}){lt}2{times}10{sup {minus}4}. This is the first direct search for {eta}{r_arrow}{mu}{ital e}. The measurements were carried out at the SPES2 tagged {eta} facility at Laboratoire National Saturne in the course of a measurement of {ital B}({eta}{r_arrow}{mu}{sup +}{mu}{sup {minus}}). {copyright} {ital 1996 The American Physical Society.}

  1. Arrows as anchors: An analysis of the material features of electric field vector arrows

    Science.gov (United States)

    Gire, Elizabeth; Price, Edward

    2014-12-01

    Representations in physics possess both physical and conceptual aspects that are fundamentally intertwined and can interact to support or hinder sense making and computation. We use distributed cognition and the theory of conceptual blending with material anchors to interpret the roles of conceptual and material features of representations in students' use of representations for computation. We focus on the vector-arrows representation of electric fields and describe this representation as a conceptual blend of electric field concepts, physical space, and the material features of the representation (i.e., the physical writing and the surface upon which it is drawn). In this representation, spatial extent (e.g., distance on paper) is used to represent both distances in coordinate space and magnitudes of electric field vectors. In conceptual blending theory, this conflation is described as a clash between the input spaces in the blend. We explore the benefits and drawbacks of this clash, as well as other features of this representation. This analysis is illustrated with examples from clinical problem-solving interviews with upper-division physics majors. We see that while these intermediate physics students make a variety of errors using this representation, they also use the geometric features of the representation to add electric field contributions and to organize the problem situation productively.

  2. Nobel Prize for work on broken symmetries

    CERN Multimedia

    2008-01-01

    The 2008 Nobel Prize for Physics goes to three physicists who have worked on broken symmetries in particle physics. The announcement of the 2008 Nobel Prize for physics was transmitted to the Globe of Science and Innovation via webcast on the occasion of the preview of the Nobel Accelerator exhibition.On 7 October it was announced that the Royal Swedish Academy of Sciences had awarded the 2008 Nobel Prize for physics to three particle physicists for their fundamental work on the mechanisms of broken symmetries. Half the prize was awarded to Yoichiro Nambu of Fermilab for "the discovery of the mechanism of spontaneous broken symmetry in subatomic physics". The other half is shared by Makato Kobayashi of Japan’s KEK Institute and Toshihide Maskawa of the Yukawa Institute at the University of Kyoto "for the discovery of the origin of the broken symmetry which predicts the existence of at least three families of quarks in Nature". At th...

  3. Damped Arrow-Hurwicz algorithm for sphere packing

    Science.gov (United States)

    Degond, Pierre; Ferreira, Marina A.; Motsch, Sebastien

    2017-03-01

    We consider algorithms that, from an arbitrarily sampling of N spheres (possibly overlapping), find a close packed configuration without overlapping. These problems can be formulated as minimization problems with non-convex constraints. For such packing problems, we observe that the classical iterative Arrow-Hurwicz algorithm does not converge. We derive a novel algorithm from a multi-step variant of the Arrow-Hurwicz scheme with damping. We compare this algorithm with classical algorithms belonging to the class of linearly constrained Lagrangian methods and show that it performs better. We provide an analysis of the convergence of these algorithms in the simple case of two spheres in one spatial dimension. Finally, we investigate the behaviour of our algorithm when the number of spheres is large in two and three spatial dimensions.

  4. Between Arrow and Gibbard-Satterthwaite; A representation theoretic approach

    CERN Document Server

    Falik, Dvir

    2012-01-01

    A central theme in social choice theory is that of impossibility theorems, such as Arrow's theorem and the Gibbard-Satterthwaite theorem, which state that under certain natural constraints, social choice mechanisms are impossible to construct. In recent years, beginning in Kalai`01, much work has been done in finding \\textit{robust} versions of these theorems, showing "approximate" impossibility remains even when most, but not all, of the constraints are satisfied. We study a spectrum of settings between the case where society chooses a single outcome (\\'a-la-Gibbard-Satterthwaite) and the choice of a complete order (as in Arrow's theorem). We use algebraic techniques, specifically representation theory of the symmetric group, and also prove robust versions of the theorems that we state. Our relaxations of the constraints involve relaxing of a version of "independence of irrelevant alternatives", rather than relaxing the demand of a transitive outcome, as is done in most other robustness results.

  5. Multi-Vacuum Initial Conditions and the Arrow of Time

    CERN Document Server

    Bousso, Raphael

    2012-01-01

    Depending on the type and arrangement of metastable vacua in the theory, initial conditions in a de Sitter vacuum with arbitrarily large entropy can be compatible with the observed arrow of time, if the causal patch or related measures are used to regulate divergences. An important condition, however, is that the initial vacuum cannot produce observers from rare fluctuations (Boltzmann brains). Here we consider more general initial conditions where multiple vacua have nonzero initial probability. We examine whether the prediction of an arrow of time is destroyed by a small initial admixture of vacua that can produce Boltzmann brains. We identify general criteria and apply them to two nontrivial examples of such initial probability distributions. The Hartle-Hawking state is superexponentially dominated by the vacuum with smallest positive cosmological constant, so one might expect that other initial vacua can be neglected; but in fact, their inclusion drastically narrows the range of theory parameters for whic...

  6. On the 3-arrow calculus for homotopy categories

    CERN Document Server

    Thomas, Sebastian

    2010-01-01

    We develop a localisation theory for certain categories, yielding a 3-arrow calculus: Every morphism in the localisation is represented by a diagram of length 3, and two such diagrams represent the same morphism if and only if they can be embedded in a 3-by-3 diagram in an appropriate way. The methods to construct this localisation are similar to the Ore localisation for a 2-arrow calculus; in particular, we do not have to use zigzags of arbitrary length. Applications include the localisation of an arbitrary model category with respect to its weak equivalences as well as the localisation of its full subcategories of cofibrant, fibrant and bifibrant objects, giving the homotopy category in all four cases. In contrast to the approach of Dwyer, Hirschhorn, Kan and Smith, the model category under consideration does not need to admit functorial factorisations. Moreover, our method shows that the derived category of any abelian (or idempotent splitting exact) category admits a 3-arrow calculus if we localise the ca...

  7. Arrow y Sen: el rescate del individuo y de las instituciones Arrow and Sen: rescuing the individual and institutions

    Directory of Open Access Journals (Sweden)

    Cante Freddy

    1998-12-01

    Full Text Available La teoría de la elección social que propone Arrow y Sen es una ruptura con los desarrollos hegemónicos de la microeconomía y de la macroeconomía en dos sentidos: rescata la diversidad de gustos y valores de cada individuo en oposición a los conceptos agregados; además, muestra que la conducta racional es quizás lo menos importante con lo que abre un diálogo con la economía institucional.The theory of social choice proposed by Arrow and Sen breaks with the hegemonic developments of microeconomics and macroeconomics in two senses: it rescues the diversity of tastes and values of each individual as opposed to aggregated concepts, and in addition it shows that rational behavior is perhaps the least important kind, which opens up a dialogue with institutional economics.

  8. Current radiology. Volume 5

    Energy Technology Data Exchange (ETDEWEB)

    Wilson, G.H.; Hanafee, W.N.

    1984-01-01

    This book contains 10 selections. They are: Nuclear Magnetic Resonance Imaging, Interventional Vascular Radiology, Genitourinary Radiology, Skeletal Radiology, Digital Subtraction Angiography, Neuroradiology, Computed Tomographic Evaluation of Degenerative Diseases of the Lumbar Spine, The Lung, Otolaringology and Opthalmology, and Pediatric Radiology: Cranial, Facial, Cervical, Vertebral, and Appendicular.

  9. Battling Arrow's Paradox to Discover Robust Water Management Alternatives

    Science.gov (United States)

    Kasprzyk, J. R.; Reed, P. M.; Hadka, D.

    2013-12-01

    This study explores whether or not Arrow's Impossibility Theorem, a theory of social choice, affects the formulation of water resources systems planning problems. The theorem discusses creating an aggregation function for voters choosing from more than three alternatives for society. The Impossibility Theorem is also called Arrow's Paradox, because when trying to add more voters, a single individual's preference will dictate the optimal group decision. In the context of water resources planning, our study is motivated by recent theoretical work that has generalized the insights for Arrow's Paradox to the design of complex engineered systems. In this framing of the paradox, states of society are equivalent to water planning or design alternatives, and the voters are equivalent to multiple planning objectives (e.g. minimizing cost or maximizing performance). Seen from this point of view, multi-objective water planning problems are functionally equivalent to the social choice problem described above. Traditional solutions to such multi-objective problems aggregate multiple performance measures into a single mathematical objective. The Theorem implies that a subset of performance concerns will inadvertently dictate the overall design evaluations in unpredictable ways using such an aggregation. We suggest that instead of aggregation, an explicit many-objective approach to water planning can help overcome the challenges posed by Arrow's Paradox. Many-objective planning explicitly disaggregates measures of performance while supporting the discovery of the planning tradeoffs, employing multiobjective evolutionary algorithms (MOEAs) to find solutions. Using MOEA-based search to address Arrow's Paradox requires that the MOEAs perform robustly with increasing problem complexity, such as adding additional objectives and/or decisions. This study uses comprehensive diagnostic evaluation of MOEA search performance across multiple problem formulations (both aggregated and many

  10. Radiological Control Manual

    Energy Technology Data Exchange (ETDEWEB)

    1993-04-01

    This manual has been prepared by Lawrence Berkeley Laboratory to provide guidance for site-specific additions, supplements, and clarifications to the DOE Radiological Control Manual. The guidance provided in this manual is based on the requirements given in Title 10 Code of Federal Regulations Part 835, Radiation Protection for Occupational Workers, DOE Order 5480.11, Radiation Protection for Occupational Workers, and the DOE Radiological Control Manual. The topics covered are (1) excellence in radiological control, (2) radiological standards, (3) conduct of radiological work, (4) radioactive materials, (5) radiological health support operations, (6) training and qualification, and (7) radiological records.

  11. Modified Noether theorem and arrow of time in quantum mechanics

    Energy Technology Data Exchange (ETDEWEB)

    Asadov, V V; Kechkin, O V, E-mail: asadov@neurok.co, E-mail: kechkin@gmail.co [Neur OK-III, Lomonosov Moscow State University, Vorob' jovy Gory, 119899 Moscow (Russian Federation)

    2010-06-01

    Relativistic quantum mechanics is presented with modified Noether theorem. It was shown that Noether charges are related with thermodynamic potentials in such scheme. Broken symmetries generated by thermodynamic mode lead to gravity appearance as effective quantum field.

  12. Softly Broken Supersymmetric Gauge Theories through Compactifications

    CERN Document Server

    Takenaga, K

    1998-01-01

    Effects of boundary conditions of fields for compactified space directions on the supersymmetric gauge theories are discussed. For general and possible boundary conditions the supersymmetry is explicitly broken to yield universal soft supersymmetry breaking terms, and the gauge symmetry of the theory can also be broken through the dynamics of non-integrable phases, depending on number and the representation under the gauge group of matters. The 4-dimensional supersymmetric QCD is studied as a toy model when one of the space coordinates is compactified on $S^1$.

  13. Of arrows and flows. Causality, determination, and specificity in the Central Dogma of molecular biology.

    Science.gov (United States)

    Fantini, Bernardino

    2006-01-01

    From its first proposal, the Central Dogma had a graphical form, complete with arrows of different types, and this form quickly became its standard presentation. In different scientific contexts, arrows have different meanings and in this particular case the arrows indicated the flow of information among different macromolecules. A deeper analysis illustrates that the arrows also imply a causal statement, directly connected to the causal role of genetic information. The author suggests a distinction between two different kinds of causal links, defined as 'physical causality' and 'biological determination', both implied in the production of biological specificity.

  14. Aeroballistic Parameters of Arab arrows On the Medieval Tract "Arab Archery"

    Directory of Open Access Journals (Sweden)

    Nikolas W. Mitiukov

    2015-06-01

    Full Text Available With a helping of simple mathematical models there was analyzed the ballistic information of the Arab arrow on medieval Arabic treatise "Arab archery". It is shown that there were no any errors on the text and the translation was correct, then, apparently, Arabian heavy arrow had specific design and can no to be in one quiver with the light arrows. Regarding light arrows, then, apparently, they have the typical design with coefficient of drag function cx ≈ 2, and firing was carried out to a maximum range Arabic archer with an elevation angle about 10°.

  15. Determination of B ( D sub s sup + r arrow. phi. pi. sup + ) via observation of D sub s sup + r arrow. phi. l sup +. nu

    Energy Technology Data Exchange (ETDEWEB)

    Alexander, J.; Artuso, M.; Bebek, C.; Berkelman, K.; Browder, T.; Cassel, D.G.; Cheu, E.; Coffman, D.M.; Crawford, G.; DeWire, J.W.; Drell, P.S.; Ehrlich, R.; Galik, R.S.; Gittelman, B.; Gray, S.W.; Halling, A.M.; Hartill, D.L.; Heltsley, B.K.; Kandaswamy, J.; Katayama, N.; Kreinick, D.L.; Lewis, J.D.; Ludwig, G.S.; Mistry, N.B.; Mueller, J.; Nandi, S.; Nordberg, E.; O' Grady, C.; Peterson, D.; Pisharody, M.; Riley, D.; Sapper, M.; Selen, M.; Silverman, A.; Stone, S.; Worden, H.; Worris, M.; Sadoff, A.J.; Avery, P.; Besson, D.; Garren, L.; Yelton, J.; Bowcock, T.; Kinoshita, K.; Pipkin, F.M.; Procario, M.; Wilson, R.; Wolinski, J.; Xiao, D.; Zhu, Y.; Ammar, R.; Baringer, P.; Coppage, D.; Haas, P.; Kelly, M.; Kwak, N.; Lam, H.; Ro, S.; Kubota, Y.; Nelson, J.K.; Perticone, D.; Poling, R.; Fulton, R.; Jensen, T.; Johnson, D.R.; Kagan, H.; Kass, R.; Morrow, F.; Whitmore, J.; Wilson, P.; Bortoletto, D.; Chen, W.; Dominick, J.; McIlwain, R.L.; Miller, D.H.; Ng, C.R.; Schaffner, S.F.; Shibata,

    1990-09-24

    Using the CLEO detector at the Cornell Electron Storage Ring (CESR), we have determined the ratio {Gamma}({ital D}{sub {ital s}}{sup +}{r arrow}{phi}{ital l}{sup +}{nu})/{Gamma}({ital D}{sub {ital s}}{sup +} {r arrow}{phi}{pi}{sup +})=0.49{plus minus}0.10{sub {minus}0.14}{sup +0.10}. We use this measurement to derive {ital B}({ital D}{sub {ital s}}{sup +}{r arrow}{phi}{pi}{sup +}).

  16. Educational treasures in Radiology: The Radiology Olympics - striving for gold in Radiology education

    OpenAIRE

    Talanow, Roland

    2010-01-01

    This article focuses on Radiology Olympics (www.RadiologyOlympics.com) - a collaboration with the international Radiology community for Radiology education, Radiolopolis (www.Radiolopolis.com). The Radiology Olympics honour the movers and shakers in Radiology education and offer an easy to use platform for educating medical professionals based on Radiology cases.

  17. Which mutation classes of quivers have constant number of arrows?

    CERN Document Server

    Ladkani, Sefi

    2011-01-01

    We classify the connected quivers with the property that all the quivers in their mutation class have the same number of arrows. These are the ones having at most two vertices, or the ones arising from triangulations of marked bordered oriented surfaces of two kinds: either surfaces with non-empty boundary having exactly one marked point on each boundary component and no punctures, or surfaces without boundary having exactly one puncture. This combinatorial property has also a representation-theoretic counterpart: to each such quiver there is a naturally associated potential such that the Jacobian algebras of all the QP in its mutation class are derived equivalent.

  18. Ratchet due to broken friction symmetry

    DEFF Research Database (Denmark)

    Norden, Bengt; Zolotaryuk, Yaroslav; Christiansen, Peter Leth;

    2002-01-01

    A ratchet mechanism that occurs due to asymmetric dependence of the friction of a moving system on its velocity or a driving force is reported. For this kind of ratchet, instead of a particle moving in a periodic potential, the dynamics of which have broken space-time symmetry, the system must be...

  19. Broken windows, mediocre methods, and substandard statistics

    NARCIS (Netherlands)

    Wicherts, J.M.; Bakker, M.

    2014-01-01

    Broken windows theory states that cues of inappropriate behavior like litter or graffiti amplify norm-violating behavior. In a series of quasi-experiments, Keizer, Lindenberg, and Steg altered cues of inappropriate behavior in public places and observed how many passersby subsequently violated norms

  20. PERIODIC-SOLUTIONS IN SPONTANEOUSLY BROKEN THEORIES

    NARCIS (Netherlands)

    BRIHAYE, Y; KUNZ, J

    1992-01-01

    A class of spontaneously broken field theories is proposed, and the occurrence of their periodic, classical solutions is investigated in detail. The emergence of multiple solutions is observed, their normal modes of oscillation are studied, and the bifurcations of the classical energy functional are

  1. Society of Interventional Radiology

    Science.gov (United States)

    ... Search Patient information Membership Directory (SIR login) Interventional Radiology General News Multiple procedure payment reduction (MPPR) rate ... contact Eleanore Moye . Learn more . American Board of Radiology Announces Maintenance of Certification Part 3: ABR diplomates ...

  2. Broken Ergodicity in Ideal, Homogeneous, Incompressible Turbulence

    Science.gov (United States)

    Morin, Lee; Shebalin, John; Fu, Terry; Nguyen, Phu; Shum, Victor

    2010-01-01

    We discuss the statistical mechanics of numerical models of ideal homogeneous, incompressible turbulence and their relevance for dissipative fluids and magnetofluids. These numerical models are based on Fourier series and the relevant statistical theory predicts that Fourier coefficients of fluid velocity and magnetic fields (if present) are zero-mean random variables. However, numerical simulations clearly show that certain coefficients have a non-zero mean value that can be very large compared to the associated standard deviation. We explain this phenomena in terms of broken ergodicity', which is defined to occur when dynamical behavior does not match ensemble predictions on very long time-scales. We review the theoretical basis of broken ergodicity, apply it to 2-D and 3-D fluid and magnetohydrodynamic simulations of homogeneous turbulence, and show new results from simulations using GPU (graphical processing unit) computers.

  3. Simple Technique for Removing Broken Pedicular Screws

    Directory of Open Access Journals (Sweden)

    A Agrawal

    2014-03-01

    Full Text Available The procedure for removing a broken pedicle screw should ideally be technically easy and minimally invasive, as any damage to the pedicle, during removal of the broken screw, may weaken the pedicle, thus compromising on the success of re-instrumentation. We describe the case of a 32-year old man who had undergone surgery for traumatic third lumbar vertebral body fracture three years prior to current admission and had developed the complication of pedicle screw breakage within the vertebral body. The patient underwent re-exploration and removal of the distal screws. Through a paravertebral incision and muscle separation, the screws and rods were exposed and the implants were removed.

  4. Ennakkohuoltojen ja varastokirjaamisien kehittäminen Arrow Maint ohjelmistoon

    OpenAIRE

    Virta, Jarkko

    2010-01-01

    Tämän opinnäytteen tarkoituksena on parantaa ja kehittää Osuuskunta Maitomaan käytössä olevaa Arrow Maint kunnossapitojärjestelmää. Kehittämisen painopiste on varastokirjaamisissa ja pastörointilinjojen 1 ja 2 huolloissa. Alkutilanteessa varaosavaraston sisällöstä ei olut kenelläkään tarkkaa tietoa ja ennakkohuolto-ohjeistus oli puutteellinen. Opinnäyte tehtiin meijeriympäristössä, yhteistyössä kohdeyhteisön kanssa. Päättötyö vaati opiskelua, palavereja ja kenttätyötä. Varastokirjaamis...

  5. Bell's theorem and the causal arrow of time

    Science.gov (United States)

    Argaman, Nathan

    2010-10-01

    Einstein held that the formalism of quantum mechanics involves "spooky actions at a distance." In the 1960s, Bell amplified this by showing that the predictions of quantum mechanics disagree with the results of any locally causal description. It should be appreciated that accepting nonlocal descriptions while retaining causality leads to a clash with relativity. Furthermore, the causal arrow of time by definition contradicts time-reversal symmetry. For these reasons, Wheeler and Feynman, Costa de Beauregard, Cramer, Price, and others have advocated abandoning microscopic causality. In this paper, a simplistic but concrete example of this line of thought is presented, in the form of a retro-causal toy model that is stochastic and provides an appealing description of the quantum correlations discussed by Bell. It is concluded that Einstein's "spooky actions" may occur "in the past" rather than "at a distance," resolving the tension between quantum mechanics and relativity and opening unexplored possibilities for future reformulations of quantum mechanics.

  6. Cosmic update dark puzzles : arrow of time : future history

    CERN Document Server

    Adams, Fred; Mersini-Houghton, Laura; Nekoogar, Farzad

    2012-01-01

    "...The Multiversal book series is equally unique, providing book-length extensions of the lectures with enough additional depth for those who truly want to explore these fields, while also providing the kind of clarity that is appropriate for interested lay people to grasp the general principles involved." - Lawrence M. Krauss Cosmic Update covers: A novel approach to uncover the dark faces of the Standard Model of cosmology. The possibility that Dark Energy and Dark Matter are manifestations of the inhomogeneous geometry of our Universe. The history of cosmological model building and the general architecture of cosmological models. Illustrations of the Large Scale Structure of the Universe. A new perspective on the classical static Einstein Cosmos. Global properties of World Models including their Topology. The Arrow of Time in a Universe with a Positive Cosmological Constant. The exploration of the consequences of a fundamental Cosmological Constant for our Universe. The exploration of why the current ob...

  7. Quantum Solution to the Arrow-of-Time Dilemma

    Science.gov (United States)

    Maccone, Lorenzo

    2009-08-01

    The arrow-of-time dilemma states that the laws of physics are invariant for time inversion, whereas the familiar phenomena we see everyday are not (i.e., entropy increases). I show that, within a quantum mechanical framework, all phenomena which leave a trail of information behind (and hence can be studied by physics) are those where entropy necessarily increases or remains constant. All phenomena where the entropy decreases must not leave any information of their having happened. This situation is completely indistinguishable from their not having happened at all. In the light of this observation, the second law of thermodynamics is reduced to a mere tautology: physics cannot study those processes where entropy has decreased, even if they were commonplace.

  8. The Universal Arrow of Time II: Quantum mechanics case

    CERN Document Server

    Kupervasser, Oleg

    2011-01-01

    The given paper is natural continuation of our previous paper arXiv:1011.4173 We have illustrated earlier, that in the classical Hamilton mechanics for an overwhelming majority of real chaotic macroscopic systems there is alignment of their thermodynamic time arrows because of their small interaction. This fact and impossibility to observe entropy decrease at introspection explain the second low of thermodynamics. In a quantum mechanics the situation even is little bit easier - all closed systems of finite volume are periodic or nearly periodic. The proof in a quantum mechanics is in many respects similar to the proof in the classical Hamilton mechanics - it also uses small interaction between subsystems and impossibility to observe entropy decrease at introspection. However there are special cases which were not in the classical mechanics. In these cases a one microstate corresponds to a set of possible macrostates (more precisely their quantum superposition). Consideration this property with using decoheren...

  9. Strength Assessment of Broken Rock Postgrouting Reinforcement Based on Initial Broken Rock Quality and Grouting Quality

    Directory of Open Access Journals (Sweden)

    Hongfa Xu

    2017-01-01

    Full Text Available To estimate postgrouting rock mass strength growth is important for engineering design. In this paper, using self-developed indoor pressure-grouting devices, 19 groups of test cubic blocks were made of the different water cement ratio grouting into the broken rock of three kinds of particle sizes. The shear strength parameters of each group under different conditions were tested. Then this paper presents a quantitative calculation method for predicting the strength growth of grouted broken rock. Relational equations were developed to investigate the relationship between the growth rates of uniaxial compressive strength (UCS, absolute value of uniaxial tensile strength (AUTS, internal friction angle, and cohesion for post- to pregrouting broken rock based on Mohr-Coulomb strength criterion. From previous test data, the empirical equation between the growth rate of UCS and the ratio of the initial rock mass UCS to the grout concretion UCS has been determined. The equations of the growth rates of the internal friction coefficient and UCS for grouting broken rock with rock mass rating (RMR and its increment have been established. The calculated results are consistent with the experimental results. These observations are important for engineered design of grouting reinforcement for broken rock mass.

  10. O debate de Amartya Sen com Kenneth Arrow e John Rawls e a abordagem das capacidades

    OpenAIRE

    2009-01-01

    O objetivo dessa dissertação é investigar em que sentido é pertinente localizar na teoria da escolha social de Kenneth Arrow e na teoria da justiça de John Rawls as duas principais raízes teóricas da abordagem das capacidades de Amartya Sen. Argumentar-se-á que a teoria da escolha social de Arrow cumpriu o papel de explicitar as deficiências da teoria econômica do bem-estar. Desse modo, as análises de Arrow apontam as limitações a serem superadas para se chegar a uma teor...

  11. Broken Lifshitz invariance, spin waves and hydrodynamics

    CERN Document Server

    Roychowdhury, Dibakar

    2016-01-01

    In this paper, based on the basic principles of thermodynamics, we explore the hydrodynamic regime of interacting Lifshitz field theories in the presence of broken rotational invariance. We compute the entropy current and discover new dissipative effects those are consistent with the principle of local entropy production in the fluid. In our analysis, we consider both the parity even as well as the parity odd sector upto first order in the derivative expansion. Finally, we argue that the present construction of the paper could be systematically identified as that of the hydrodynamic description associated with \\textit{spin waves} (away from the domain of quantum criticality) under certain limiting conditions.

  12. Spontaneously broken Lorentz symmetry and gravity

    CERN Document Server

    Jacobson, T; Jacobson, Ted; Mattingly, David

    2000-01-01

    We study a generally covariant model in which local Lorentz invariance is broken "spontaneously" by a dynamical unit timelike vector field $u^a$---the "aether". Such a model makes it possible to study the gravitational and cosmological consequences of preferred frame effects, such as ``variable speed of light" or high frequency dispersion, while preserving a generally covariant metric theory of gravity. In this paper we restrict attention to an action for an effective theory of the aether which involves only the antisymmetrized derivative $\

  13. Broken safety pin in bronchus - Anaesthetic considerations

    Directory of Open Access Journals (Sweden)

    Roona Shad

    2012-01-01

    Full Text Available Safety pins are not commonly aspirated objects in infants and form only a small fraction of all the metallic foreign body (FB which accounts for 4.4% of all foreign bodies found in tracheobronchial tree. Bronchoscopy procedure has various complications, in addition to failure to remove FB due to its impaction, especially with metallic pointed objects ending up in open surgical removal. Infant with inhaled foreign body are always a challenge to anaesthetist. We had one such case of broken safety pin impacted in the wall of right bronchus of an infant with failure to remove on repeated attempts at rigid bronchoscopy.

  14. Broken safety pin in bronchus - Anaesthetic considerations.

    Science.gov (United States)

    Shad, Roona; Agarwal, Aditya

    2012-11-01

    Safety pins are not commonly aspirated objects in infants and form only a small fraction of all the metallic foreign body (FB) which accounts for 4.4% of all foreign bodies found in tracheobronchial tree. Bronchoscopy procedure has various complications, in addition to failure to remove FB due to its impaction, especially with metallic pointed objects ending up in open surgical removal. Infant with inhaled foreign body are always a challenge to anaesthetist. We had one such case of broken safety pin impacted in the wall of right bronchus of an infant with failure to remove on repeated attempts at rigid bronchoscopy.

  15. Rotating optical microcavities with broken chiral symmetry

    CERN Document Server

    Sarma, Raktim; Wiersig, Jan; Cao, Hui

    2014-01-01

    We demonstrate in open microcavities with broken chiral symmetry, quasi-degenerate pairs of co-propagating modes in a non-rotating cavity evolve to counter-propagating modes with rotation. The emission patterns change dramatically by rotation, due to distinct output directions of CW and CCW waves. By tuning the degree of spatial chirality, we maximize the sensitivity of microcavity emission to rotation. The rotation-induced change of emission is orders of magnitude larger than the Sagnac effect, pointing to a promising direction for ultrasmall optical gyroscopes.

  16. Comments on Holography with Broken Lorentz Invariance

    CERN Document Server

    Gordeli, Ivan

    2009-01-01

    Recently a family of solutions of the Einstein equations in backgrounds with broken Lorentz invariance was found ArXiv:0712.1136. We show that the gravitational solution recently obtained by Kachru, Liu and Mulligan in ArXiv:0808.1725 is a part of the former solution which was derived earlier in the framework of extra dimensional theories. We show how the energy-momentum and Einstein tensors are related and establish a correspondence between parameters which govern Lorentz invariance violation. At the end we speculate on relations between the RG flow of a boundary theory and asymptotic behavior of gravitational solutions in the bulk.

  17. Neutrino masses and spontaneously broken flavor symmetries

    Energy Technology Data Exchange (ETDEWEB)

    Staudt, Christian

    2014-06-16

    We study the phenomenology of supersymmetric flavor models. We show how the predictions of models based on spontaneously broken non-Abelian discrete flavor symmetries are altered when we include so-called Kaehler corrections. Furthermore, we discuss anomaly-free discrete R symmetries which are compatible with SU(5) unification. We find a set of symmetries compatible with suppressed Dirac neutrino masses and a unique symmetry consistent with the Weinberg operator. We also study a pseudo-anomalous U(1){sub R} symmetry which explains the fermion mass hierarchies and, when amended with additional singlet fields, ameliorates the fine-tuning problem.

  18. Essentials of skeletal radiology

    Energy Technology Data Exchange (ETDEWEB)

    Yochum, T.R.; Rowe, L.J.

    1987-01-01

    This book discusses the following topics of skeletal radiology: Positioning of patients for diagnostic radiology and normal anatomy; congenital malformations of skeleton; measurements in radiology; spondylolisthesis; metabolic and endocrine diseases of bone and their diagnostic aspects; image processing of vertebrae, skeleton, bone fractures evaluations and epidemiological and social aspects of some bone diseases. Various modalities as CT scanning, NMR imaging, ultrasonography and biomedical radiography are briefly discussed in relation to bone pathology.

  19. Radiological Emergency Response Data

    Data.gov (United States)

    U.S. Environmental Protection Agency — Quality Data Asset includes all current and historical emergency radiological response event and incident of national significance data and surveillance, monitoring,...

  20. Absorption of solar radiation in broken clouds

    Energy Technology Data Exchange (ETDEWEB)

    Zuev, V.E.; Titov, G.A.; Zhuravleva, T.B. [Institute of Atmospheric Optics, Tomsk (Russian Federation)

    1996-04-01

    It is recognized now that the plane-parallel model unsatisfactorily describes the transfer of radiation through broken clouds and that, consequently, the radiation codes of general circulation models (GCMs) must be refined. However, before any refinement in a GCM code is made, it is necessary to investigate the dependence of radiative characteristics on the effects caused by the random geometry of cloud fields. Such studies for mean fluxes of downwelling and upwelling solar radiation in the visible and near-infrared (IR) spectral range were performed by Zuev et al. In this work, we investigate the mean spectral and integrated absorption of solar radiation by broken clouds (in what follows, the term {open_quotes}mean{close_quotes} will be implied but not used, for convenience). To evaluate the potential effect of stochastic geometry, we will compare the absorption by cumulus (0.5 {le} {gamma} {le} 2) to that by equivalent stratus ({gamma} <<1) clouds; here {gamma} = H/D, H is the cloud layer thickness and D the characteristic horizontal cloud size. The equivalent stratus clouds differ from cumulus only in the aspect ratio {gamma}, all the other parameters coinciding.

  1. Literary Translation: The Experience of Translating Chinua Achebe's "Arrow of God" into French.

    Science.gov (United States)

    d'Almeida, Irene

    1981-01-01

    Uses Achebe's "Arrow of God" as example of difficulty in translating English into French when author and translators are not native speakers of these languages. Suggests inventing French gibberish or use of translator's notes to translate Pidgin English. (BK)

  2. Existence of Arrow-Debreu Equilibrium with S-shaped Utility Function

    Institute of Scientific and Technical Information of China (English)

    Yang Xi

    2007-01-01

    This paper characterizes the optimal solution of subjective expected utility with S-shaped utility function, by using the prospect theory (PT). We also prove the existence of Arrow-Debreu equilibrium.

  3. Arrow Lakes Reservoir Fertilization Experiment; Years 4 and 5, Technical Report 2002-2003.

    Energy Technology Data Exchange (ETDEWEB)

    Schindler, E.

    2007-02-01

    This report presents the fourth and fifth year (2002 and 2003, respectively) of a five-year fertilization experiment on the Arrow Lakes Reservoir. The goal of the experiment was to increase kokanee populations impacted from hydroelectric development on the Arrow Lakes Reservoir. The impacts resulted in declining stocks of kokanee, a native land-locked sockeye salmon (Oncorhynchus nerka), a key species of the ecosystem. Arrow Lakes Reservoir, located in southeastern British Columbia, has undergone experimental fertilization since 1999. It is modeled after the successful Kootenay Lake fertilization experiment. The amount of fertilizer added in 2002 and 2003 was similar to the previous three years. Phosphorus loading from fertilizer was 52.8 metric tons and nitrogen loading from fertilizer was 268 metric tons. As in previous years, fertilizer additions occurred between the end of April and the beginning of September. Surface temperatures were generally warmer in 2003 than in 2002 in the Arrow Lakes Reservoir from May to September. Local tributary flows to Arrow Lakes Reservoir in 2002 and 2003 were generally less than average, however not as low as had occurred in 2001. Water chemistry parameters in select rivers and streams were similar to previous years results, except for dissolved inorganic nitrogen (DIN) concentrations which were significantly less in 2001, 2002 and 2003. The reduced snow pack in 2001 and 2003 would explain the lower concentrations of DIN. The natural load of DIN to the Arrow system ranged from 7200 tonnes in 1997 to 4500 tonnes in 2003; these results coincide with the decrease in DIN measurements from water samples taken in the reservoir during this period. Water chemistry parameters in the reservoir were similar to previous years of study except for a few exceptions. Seasonal averages of total phosphorus ranged from 2.11 to 7.42 {micro}g/L from 1997 through 2003 in the entire reservoir which were indicative of oligo-mesotrophic conditions

  4. Physics of Radiology

    CERN Document Server

    Johns, Harold Elford

    1983-01-01

    Authority, comprehensivity and a consummate manner of presentation have been hallmarks of The Physics of Radiology since it first saw publication some three decades past. This Fourth Edition adheres to that tradition but again updates the context. It thoroughly integrates ideas recently advanced and practices lately effected. Students and professionals alike will continue to view it, in essence, as the bible of radiological physics.

  5. Study of the decays D sup 0 r arrow K K ,. pi. pi

    Energy Technology Data Exchange (ETDEWEB)

    Alexander, J.; Artuso, M.; Bebek, C.; Berkelman, K.; Browder, T.; Cassel, D.G.; Cheu, E.; Coffman, D.M.; Crawford, G.; DeWire, J.W.; Drell, P.S.; Ehrlich, R.; Gittelman, B.; Gray, S.W.; Halling, A.M.; Hartill, D.L.; Heltsley, B.K.; Honscheid, K.; Kandaswamy, J.; Katayama, N.; Kreinick, D.L.; Lewis, J.D.; Ludwig, G.S.; Mistry, N.B.; Nandi, S.; Nordberg, E.; O' Grady, C.; Peterson, D.; Pisharody, M.; Riley, D.; Sapper, M.; Selen, M.; Silverman, A.; Stone, S.; Worden, H.; Worris, M.; Sadoff, A.J.; Avery, P.; Besson, D.; Garren, L.; Yelton, J.; Kinoshita, K.; Pipkin, F.M.; Procario, M.; Wilson, R.; Wolinski, J.; Xiao, D.; Zhu, Y.; Ammar, R.; Baringer, P.; Coppage, D.; Haas, P.; Kelly, M.; Kwak, N.; Lam, H.; Ro, S.; Jawahery, A.; Kubota, Y.; Nelson, J.K.; Perticone, D.; Poling, R.; Fulton, R.; Jensen, T.; Johnson, D.R.; Kagan, H.; Kass, R.; Morrow, F.; Whitmore, J.; Wilson, P.; Bortoletto, D.; Chen, W.; Dominick, J.; McIlwain, R.L.; Miller, D.H.; Ng, C.R.; Schaffner, S.F.; Shibata, E.I.; Shi

    1990-09-03

    Using the CLEO detector we have observed the Cabibbo-suppressed decays {ital D}{sup 0}{r arrow}{ital K}{sup 0}{ital {bar K}0}, {ital K}{sup +}{ital K}{sup {minus}}, and {pi}{sup +}{pi}{sup {minus}}. We determine {ital B}({ital D}{sup 0}{r arrow}{ital K}{sup 0}{ital {bar K}0})= (0.13{sup +0.07}{sub {minus}0.05}{sup +0.02}{sub {minus}0.02})%. Our measurement {ital B}({ital D}{sup 0}{r arrow}{ital K}{sup +}{ital K}{sup {minus}})/{ital B}({ital D}{sup 0}{r arrow}{pi}{sup +}{pi}{sup {minus}})=2.35{plus minus}0.37{plus minus}0.28 represents asubstantial improvement over previous results. We find no evidence for the decay {ital D}{sup 0}{r arrow}{pi}{sup 0}{pi}{sup 0}, and place a 90%-confidence-level upper limit of {ital B}({ital D}{sup 0}{r arrow}{pi}{sup 0}{pi}{sup 0}){lt}0.46%.

  6. Liquid Core ARROW Waveguides: A Promising Photonic Structure for Integrated Optofluidic Microsensors

    Directory of Open Access Journals (Sweden)

    Genni Testa

    2016-03-01

    Full Text Available In this paper, we introduce a liquid core antiresonant reflecting optical waveguide (ARROW as a novel optofluidic device that can be used to create innovative and highly functional microsensors. Liquid core ARROWs, with their dual ability to guide the light and the fluids in the same microchannel, have shown great potential as an optofluidic tool for quantitative spectroscopic analysis. ARROWs feature a planar architecture and, hence, are particularly attractive for chip scale integrated system. Step by step, several improvements have been made in recent years towards the implementation of these waveguides in a complete on-chip system for highly-sensitive detection down to the single molecule level. We review applications of liquid ARROWs for fluids sensing and discuss recent results and trends in the developments and applications of liquid ARROW in biomedical and biochemical research. The results outlined show that the strong light matter interaction occurring in the optofluidic channel of an ARROW and the versatility offered by the fabrication methods makes these waveguides a very promising building block for optofluidic sensor development.

  7. A tight quantitative version of Arrow's impossibility theorem

    CERN Document Server

    Keller, Nathan

    2010-01-01

    The well-known Impossibility Theorem of Arrow asserts that any Generalized Social Welfare Function (GSWF) with at least three alternatives, which satisfies Independence of Irrelevant Alternatives (IIA) and Unanimity and is not a dictatorship, is necessarily non-transitive. In 2002, Kalai asked whether one can obtain the following quantitative version of the theorem: For any $\\epsilon>0$, there exists $\\delta=\\delta(\\epsilon)$ such that if a GSWF on three alternatives satisfies the IIA condition and its probability of non-transitive outcome is at most $\\delta$, then the GSWF is at most $\\epsilon$-far from being a dictatorship or from breaching the Unanimity condition. In 2009, Mossel proved such quantitative version, with $\\delta(\\epsilon)=\\exp(-C/\\epsilon^{21})$, and generalized it to GSWFs with $k$ alternatives, for all $k \\geq 3$. In this paper we show that the quantitative version holds with $\\delta(\\epsilon)=C \\cdot \\epsilon^3$, and that this result is tight up to logarithmic factors. Furthermore, our res...

  8. Restoring broken entanglement by injecting separable correlations

    CERN Document Server

    Pirandola, Stefano

    2012-01-01

    The distribution of entanglement is central in many protocols of quantum information and computation. However it is also known to be a very fragile process when loss and noise come into play. The inevitable interaction of the quantum systems with the external environment induces effects of decoherence which may be so strong to destroy any input entanglement, a phenomenon known as "entanglement breaking". Here we study this catastrophic process in a correlated-noise environment showing how the presence of classical-type correlations can restore the distribution of entanglement. In particular, we consider a Gaussian environment whose thermal noise is strong enough to break the entanglement of two bosonic modes of the electromagnetic field. In this scenario, we show that the injection of separable correlations from the same environment is able to reactivate the broken entanglement. This paradoxical effect happens both in schemes of direct distribution, where a third party (Charlie) broadcasts entangled states to...

  9. Effective Action of Softly Broken Supersymmetric Theories

    CERN Document Server

    Nibbelink, S G; Nibbelink, Stefan Groot; Nyawelo, Tino S.

    2007-01-01

    We study the renormalization of (softly) broken supersymmetric theories at the one loop level in detail. We perform this analysis in a superspace approach in which the supersymmetry breaking interactions are parameterized using spurion insertions. We comment on the uniqueness of this parameterization. We compute the one loop renormalization of such theories by calculating superspace vacuum graphs with multiple spurion insertions. To preform this computation efficiently we develop algebraic properties of spurion operators, that naturally arise because the spurions are often surrounded by superspace projection operators. Our results are general apart from the restrictions that higher super covariant derivative terms and some finite effects due to non-commutativity of superfield dependent mass matrices are ignored. One of the soft potentials induces renormalization of the Kaehler potential.

  10. Nonreciprocal Multiferroic Superlattices with Broken Parity Symmetry

    Science.gov (United States)

    Tang, Zhenghua; Zhang, Weiyi

    Multiferroic materials are characterized by the coexistence of ferroelectric and ferromagnetic (or antiferromagnetic) orders, the coupling to lattice vibration can be invoked either through piezoelectric or piezomagnetic effects. In this paper, the polaritonic band structures of multiferroic superlattices composed of oppositely polarized domains are investigated using the generalized transfer matrix method. For the primitive cell with broken parity symmetry, the polaritonic band structure is asymmetrical with respect to the forward and backward propagation directions (nonreciprocality). In particular, the band extreme points move away from the Brillouin zone center. This asymmetry in band-gap positions and widths can be used to design compact one-way optical isolators, while the extremely slow light velocities near the asymmetrical upper edges of lower bands includes the essential ingredients for designing slow light devices.

  11. Effects of broken affordance on visual extinction.

    Science.gov (United States)

    Wulff, Melanie; Humphreys, Glyn W

    2015-01-01

    Previous studies have shown that visual extinction can be reduced if two objects are positioned to "afford" an action. Here we tested if this affordance effect was disrupted by "breaking" the affordance, i.e., if one of the objects actively used in the action had a broken handle. We assessed the effects of broken affordance on recovery from extinction in eight patients with right hemisphere lesions and left-sided extinction. Patients viewed object pairs that were or were not commonly used together and that were positioned for left- or right-hand actions. In the unrelated pair conditions, either two tools or two objects were presented. In line with previous research (e.g., Riddoch et al., 2006), extinction was reduced when action-related object pairs and when unrelated tool pairs were presented compared to unrelated object pairs. There was no significant difference in recovery rate between action-related (object-tool) and unrelated tool pairs. In addition, performance with action-related objects decreased when the tool appeared on the ipsilesional side compared to when it was on the contralesional side, but only when the tool handle was intact. There were minimal effects of breaking the handle of an object rather than a tool, and there was no effect of breaking the handle on either tools or objects on single item trials. The data suggest that breaking the handle of a tool lessens the degree to which it captures attention, with this attentional capture being strongest when the tool appears on the ipsilesional side. The capture of attention by the ipsilesional item then reduces the chance of detecting the contralesional stimulus. This attentional capture effect is mediated by the affordance to the intact tool.

  12. Effects of broken affordance on visual extinction

    Directory of Open Access Journals (Sweden)

    Melanie eWulff

    2015-09-01

    Full Text Available Previous studies have shown that visual extinction can be reduced if two objects are positioned to afford an action. Here we tested if this affordance effect was disrupted by breaking the affordance – if one of the objects actively used in the action had a broken handle. We assessed the effects of broken affordance on recovery from extinction in eight patients with right hemisphere lesions and left-sided extinction. Patients viewed object pairs that were or were not commonly used together and that were positioned for left- or right-hand actions. In the unrelated pair conditions, either two tools or two objects were presented. In line with previous research (e.g., Riddoch et al., 2006, extinction was reduced when action-related object pairs and when unrelated tool pairs were presented compared to unrelated object pairs. There was no significant difference in recovery rate between action-related (object-tool and unrelated tool-tool pairs. In addition, performance with action-related objects decreased when the tool appeared on the ipsilesional side compared to when it was on the contralesional side, but only when the tool handle was intact. There were minimal effects of breaking the handle of an object rather than a tool, and there was no effect of breaking the handle on either tools or objects on single item trials. The data suggest that breaking the handle of a tool lessens the degree to which it captures attention, with this attentional capture being strongest when the tool appears on the ipsilesional side. The capture of attention by the ipsilesional item then reduces the chance of detecting the contralesional stimulus. This attentional capture effect is mediated by the affordance to the intact tool.

  13. Modified broken rice starch as fat substitute in sausages

    Directory of Open Access Journals (Sweden)

    Valéria Maria Limberger

    2011-09-01

    Full Text Available The demand for low-fat beef products has led the food industry to use fat substitutes such as modified starch. About 14% of broken rice is generated during processing. Nevertheless, this by-product contains high levels of starch; being therefore, great raw material for fat substitution. This study evaluated the applicability of chemically and physically modified broken rice starch as fat substitute in sausages. Extruded and phosphorylated broken rice was used in low-fat sausage formulation. All low-fat sausages presented about 55% reduction in the fat content and around 28% reduction in the total caloric value. Fat replacement with phosphorylated and extruded broken rice starch increased the texture acceptability of low-fat sausages, when compared to low-fat sausages with no modified broken rice. Results suggest that modified broken rice can be used as fat substitute in sausage formulations, yielding lower caloric value products with acceptable sensory characteristics.

  14. Arrow: la elección, los valores y la ideología del mercado Arrow: choice, values and the ideology of the market

    Directory of Open Access Journals (Sweden)

    González Jorge Iván

    1998-06-01

    Full Text Available En nuestro medio se conocen más los trabajos de Arrow sobre el equilibrio que sus estudios sobre la teoría de la elección. Este artículo recuerda el postulado central de Arrow: los mecanismos de mercado son incapaces de resolver el conflicto entre valores individuales y elecció social. También existe conflicto entre la evolución de los valores y la formación de los deseos. La teoría de la elección ofrece elementos muy valiosos para entender las contradicciones a las que conduce el individualismo metodológico neoclásico. También pone en tela de juicio la forma indebida en que el discurso neoliberal se ha apropiado de la teoría neoclásica.We tend to know Arrow more for his work on equilibrium than for his studies on the theory of choice. This article recalls Arrow's central postulate: market mechanisms are incapable of resolving the conflict between individual values and social choice. There is also a conflict between the evolution of values and the formation of desires. Choice theory offers valuable elements for understanding the contradictions to which neoclassical methodological individualism leads. It also puts in doubt the undue form in which neoliberal discourse has appropriated
    neoclassical theory.

  15. [Controlling instruments in radiology].

    Science.gov (United States)

    Maurer, M

    2013-10-01

    Due to the rising costs and competitive pressures radiological clinics and practices are now facing, controlling instruments are gaining importance in the optimization of structures and processes of the various diagnostic examinations and interventional procedures. It will be shown how the use of selected controlling instruments can secure and improve the performance of radiological facilities. A definition of the concept of controlling will be provided. It will be shown which controlling instruments can be applied in radiological departments and practices. As an example, two of the controlling instruments, material cost analysis and benchmarking, will be illustrated.

  16. Laenderyggens degeneration og radiologi

    DEFF Research Database (Denmark)

    Jacobsen, Steffen; Gosvig, Kasper Kjaerulf; Sonne-Holm, Stig

    2006-01-01

    Low back pain (LBP) is one of the most common conditions, and at the same time one of the most complex nosological entities. The lifetime prevalence is approximately 80%, and radiological features of lumbar degeneration are almost universal in adults. The individual risk factors for LBP and signi......Low back pain (LBP) is one of the most common conditions, and at the same time one of the most complex nosological entities. The lifetime prevalence is approximately 80%, and radiological features of lumbar degeneration are almost universal in adults. The individual risk factors for LBP...... and significant relationships between radiological findings and subjective symptoms have both been notoriously difficult to identify. The lack of consensus on clinical criteria and radiological definitions has hampered the undertaking of properly executed epidemiological studies. The natural history of LBP...

  17. Radiologic Technology Program Standards.

    Science.gov (United States)

    Georgia Univ., Athens. Dept. of Vocational Education.

    This publication contains statewide standards for the radiologic technology program in Georgia. The standards are divided into 12 categories; Foundations (philosophy, purpose, goals, program objectives, availability, evaluation); Admissions (admission requirements, provisional admission requirements, recruitment, evaluation and planning); Program…

  18. Arrow Machine Track ohjelmiston hyödyntäminen päivittäisessä johtamisessa

    OpenAIRE

    Pohjala, Matti

    2016-01-01

    Tämän opinnäytetyön tarkoituksena on tutkia Teknikum Oy:n letkutuotannossa käytössä olevan Arrow Machine Track konekäyntiseurannan toimintaa ja hyödyntää saatuja tuloksia päivittäisessä johtamisessa. Arrow Machine Track ohjelmisto otettiin käyttöön letkutuotannossa keväällä 2015 kaiken kaikkiaan kuuteen tuotannon avainkoneeseen. Arrow Machine Track ohjelmisto liittyy vahvasti tuotannon virtauksen kasvattamiseen. Arrow Machine Track ohjelmistolla on tarkoitus päästä kiinni tuotannon kannal...

  19. Hygiene in radiology

    Energy Technology Data Exchange (ETDEWEB)

    Kapp-Schwoerer, A.; Daschner, F.

    1987-07-01

    A survey is given of the hygienic management in radiological departments with special regard to the handling of injections and infusions. It includes prevention of bacterial as well as viral infections. In radiological departments disinfection of X-ray tables is necessary only in exceptional cases. A special proposal for disinfection is added. A safe method of sterilisation of flexible catheders is included, which proved to prevent bacterial infection.

  20. Radiologic science for technologists

    Energy Technology Data Exchange (ETDEWEB)

    Bushong, S.C.

    1988-01-01

    This book provides in-depth coverage of physics, biology and protection for the radiologic technology student. It presents a significant portion of all of the science required of radiologic technology students under one cover. Chapter content reflects a readable and practical organization with outlines listed on the first page of each chapter and sample problems at the end. New to this edition are: new and expanded sections on radiation techniques, digital imaging, and magnetic resonance imaging and ultrasound.

  1. Diagnostic and interventional radiology

    Energy Technology Data Exchange (ETDEWEB)

    Vogl, Thomas J. [Klinikum der Johann Wolfgang Goethe-Universitaet, Frankfurt am Main (Germany). Inst. fuer Diagnostische und Interventionelle Radiologie; Reith, Wolfgang [Universitaetsklinikum des Saarlandes, Homburg/Saar (Germany). Klinik fuer Diagnostische und Interventionelle Neuroradiologie; Rummeny, Ernst J. (ed.) [Technische Univ. Muenchen Klinikum rechts der Isar, Muenchen (Germany). Inst. fuer Radiologie

    2016-08-01

    This exceptional book covers all aspects of diagnostic and interventional radiology within one volume, at a level appropriate for the specialist. From the basics through diagnosis to intervention: the reader will find a complete overview of all areas of radiology. The clear, uniform structure, with chapters organized according to organ system, facilitates the rapid retrieval of information. Features include: Presentation of the normal radiological anatomy Classification of the different imaging procedures according to their diagnostic relevance Imaging diagnosis with many reference images Precise description of the interventional options The inclusion of many instructive aids will be of particular value to novices in decision making: Important take home messages and summaries of key radiological findings smooth the path through the jungle of facts Numerous tables on differential diagnosis and typical findings in the most common diseases offer a rapid overview and orientation Diagnostic flow charts outline the sequence of diagnostic evaluation All standard procedures within the field of interventional radiology are presented in a clinically relevant and readily understandable way, with an abundance of illustrations. This is a textbook, atlas, and reference in one: with more than 2500 images for comparison with the reader's own findings. This comprehensive and totally up-to-date book provides a superb overview of everything that the radiology specialist of today needs to know.

  2. Planck driven by vision, broken by war

    CERN Document Server

    Brown, Brandon R

    2015-01-01

    Planck's Law, an equation used by physicists to determine the radiation leaking from any object in the universe, was described by Albert Einstein as "the basis of all twentieth-century physics." Max Planck is credited with being the father of quantum theory, and his work laid the foundation for our modern understanding of matter and energetic processes. But Planck's story is not well known, especially in the United States. A German physicist working during the first half of the twentieth century, his library, personal journals, notebooks, and letters were all destroyed with his home in World War II. What remains, other than his contributions to science, are handwritten letters in German shorthand, and tributes from other scientists of the time, including his close friend Albert Einstein. In Planck: Driven by Vision, Broken by War, Brandon R. Brown interweaves the voices and writings of Planck, his family, and his contemporaries-with many passages appearing in English for the first time-to create a portrait of...

  3. The wave has finally broken: now what?

    Science.gov (United States)

    Simborg, Donald W; Detmer, Don Eugene; Berner, Eta S

    2013-06-01

    In 2005, the authors published a paper, 'Will the wave finally break? A brief view of the adoption of electronic medical records in the United States', which predicted that rapid adoption of electronic health records (EHR) would occur in the next 5 years given appropriate incentives. The wave has finally broken with the stimulus of the health information technology for economic and clinical health legislation in 2009, and there have been both positive and negative developments in the ensuing years. The positive developments, among others described, are increased adoption of EHR, the emergence of a national network infrastructure and the recognition of clinical informatics as a medical specialty. Problems that still exist include, among others described, continued user interface problems, distrust of EHR-generated notes and an increased potential for fraud and abuse. It is anticipated that in the next 5 years there will be near universal EHR adoption, greater emphasis on standards and interoperability, greater involvement of Congress in health information technology (IT), breakthroughs in user interfaces, compelling online medical and IT education, both increased use of data analytics for personalized healthcare and a realization of the difficulties of this approach, a blurring of the distinction between EHR and telemedicine, a resurgence of computer-assisted diagnosis and the emergence of a 'continuously learning' healthcare system.

  4. MEGA -- A search for {mu} {r_arrow} e{gamma}

    Energy Technology Data Exchange (ETDEWEB)

    Mischke, R.E.; MEGA Collaboration

    1998-12-01

    The MEGA experiment is a search for the decay {mu} {r_arrow} e{gamma}. Even though there is no fundamental reason to expect lepton number to be a conserved quantity, processes such as {mu} {r_arrow} e{gamma} have not been observed. (The present upper limit for the branching ratio for {mu} {r_arrow} e{gamma} is 4.9 x 10{sup {minus}11}.) The minimal standard model of electroweak interactions, which is enormously successful, builds in lepton number conservation. However, the decay {mu} {r_arrow} e{gamma} is expected in many extensions to the standard model, in particular in supersymmetry models. The experimental signature for {mu} {r_arrow} e{gamma} from decays at rest is the observation of a positron and photon, each of 52.8 MeV , that are back-to-back, in time coincidence, and originate from a common spatial point. The MEGA detector consists of two spectrometers designed to measure the kinematic characteristics of positrons and photons to search for events with this signature. The primary difficulty in the analysis of these data has been the development of reconstruction algorithms that balance efficiency and resolution. Also, many calibrations and corrections are needed to get optimum resolutions. Most surviving candidate events are accidentals. Results of analysis are given.

  5. Arrows of Time in the Bouncing Universes of the No-boundary Quantum State

    CERN Document Server

    Hartle, James

    2012-01-01

    We derive the arrows of time of our universe that follow from the no-boundary theory of its quantum state (NBWF) in a minisuperspace model. Arrows of time are viewed four-dimensionally as properties of the four-dimensional Lorentzian histories of the universe. Probabilities for these histories are predicted by the NBWF. For histories with a regular `bounce' at a minimum radius we find that fluctuations are small at the bounce and grow in the direction of expansion on either side. For recollapsing classical histories with big bang and big crunch singularities we find that the fluctuations are small near one singularity and grow through the expansion and recontraction to the other singularity. The arrow of time defined by the growth in fluctuations thus points in one direction over the whole of a recollapsing spacetime but is bidirectional in a bouncing spacetime. We argue that the electromagnetic, thermodynamic, and psychological arrows of time are aligned with the fluctuation arrow. The implications of a bidi...

  6. The conflict adaptation is affected by attentional strategies: evidence from the arrow flanker task

    Institute of Scientific and Technical Information of China (English)

    CHEN Jia; LI Chang; HE ChunHong; CHEN AnTao

    2009-01-01

    Recently, several studies have considered factors affecting the occurrence of congruency sequence effect (CSE) in the arrow flanker task. In the present study, the influence of the following factors was examined: the presentation of a fixation and the intertrial interval (ITI) were considered. Results of the study showed that the CSE was significant when there was no fixation and when the ITI was long for response repetitions and response changes, but disappeared for response change trials in other conditions. These results showed that, even in the arrow flanker task, the conflict adaptation effect did contribute to the CSE. The current results suggested that the conflict adaptation effect in the arrow flanker task was based on the appropriate application of attention strategies.

  7. References and arrow notation instead of join operation in query languages

    Directory of Open Access Journals (Sweden)

    Alexandr Savinov

    2012-10-01

    Full Text Available We study properties of the join operation in query languages and describe some of its major drawbacks. We provide strong arguments against using joins as a main construct for retrieving related data elements in general purpose query languages and argue for using references instead. Since conventional references are quite restrictive when applied to data modeling and query languages, we propose to use generalized references as they are defined in the concept-oriented model (COM. These references are used by two new operations, called projection and de-projection, which are denoted by right and left arrows and therefore this access method is referred to as arrow notation. We demonstrate advantages of the arrow notation in comparison to joins and argue that it makes queries simpler, more natural, easier to understand, and the whole query writing process more productive and less error-prone.

  8. The Future of Radiology

    Directory of Open Access Journals (Sweden)

    Alexander R. Margulis

    2011-07-01

    Full Text Available It has been my good fortune to live and practice radiology during a long period of momentous change – to see the transformation of the discipline from a supportive service into a mainstream, essential branch of clinical medicine. I remember wearing red goggles to adapt my vision before performing fluoroscopy; observing the horrible, now thankfully obsolete, practice of ventriculography, which was considered advanced neuroradiology; and performing other, now rarely prescribed procedures, such as double-contrast barium enemas and intravenous pyelography. Witnessing the beginnings of interventional radiology, I suggested its name in an editorial. I also had the good fortune to see the introduction of computed tomography (CT and a technology first known as nuclear magnetic resonance imaging. Together with fellow members of a committee of the American College of Radiology and editors of prestigious radiological journals, I took part in changing the name of the latter modality to MRI, freeing it from threatening implications. Looking back on these experiences, one lesson stands out above all: Innovation and transformation never cease. Looking forward, it is clear that radiology, along with the rest of medicine, is now undergoing further momentous changes that will affect the future of all those already practicing as well as those yet to start their careers.

  9. Radiological protection; Proteccion radiologica

    Energy Technology Data Exchange (ETDEWEB)

    Azorin N, J. [Universidad Autonoma Metropolitana, Unidad Iztapalapa, Division de Ciencias Basicas e Ingenieria, Av. San Rafael Atlixco 186, Col. Vicentina, 09340 Mexico, D. F. (Mexico); Azorin V, J. C. [Universidad de Guanajuato, Campus Leon, Division de Ciencias e Ingenieria, Loma del Bosque 103, Lomas del Campestre, 37150 Leon de los Aldama, Guanajuato (Mexico)

    2010-07-01

    This work is directed to all those people related with the exercise of the radiological protection and has the purpose of providing them a base of knowledge in this discipline so that they can make decisions documented on technical and scientist factors for the protection of the personnel occupationally exposed, the people in general and the environment during the work with ionizing radiations. Before de lack of a text on this matter, this work seeks to cover the specific necessities of our country, providing a solid presentation of the radiological protection, included the bases of the radiations physics, the detection and radiation dosimetry, the radiobiology, the normative and operational procedures associates, the radioactive wastes, the emergencies and the transport of the radioactive material through the medical and industrial applications of the radiations, making emphasis in the relative particular aspects to the radiological protection in Mexico. The book have 16 chapters and with the purpose of supplementing the given information, are included at the end four appendixes: 1) the radioactive waste management in Mexico, 2-3) the Mexican official standards related with the radiological protection, 4) a terms glossary used in radiological protection. We hope this book will be of utility for those people that work in the investigation and the applications of the ionizing radiations. (Author)

  10. Evidence for the Decay K{sup +}{r_arrow}{pi}{sup +}{nu}{bar v}

    Energy Technology Data Exchange (ETDEWEB)

    Adler, S.; Atiya, M.S.; Chiang, I.; Diwan, M.V.; Frank, J.S.; Haggerty, J.S.; Kettell, S.H.; Kycia, T.F.; Li, K.K.; Littenberg, L.S.; Ng, C.; Sambamurti, A.; Stevens, A.; Strand, R.C.; Witzig, C. [Brookhaven National Laboratory, Upton, New York 11973 (United States); Komatsubara, T.K.; Kuriki, M.; Muramatsu, N.; Sugimoto, S. [High Energy Accelerator Research Organization (KEK), Tanashi-branch, Midoricho, Tanashi, Tokyo 188 (Japan); Inagaki, T.; Kabe, S.; Kobayashi, M.; Kuno, Y.; Sato, T.; Shinkawa, T.; Yoshimura, Y. [High Energy Accelerator Research Organization (KEK), Oho, Tsukuba, Ibaraki 305 (Japan); Kishi, Y.; Nakano, T. [Department of Physics, Osaka University, Machikaneyama, Toyonaka, Osaka 560 (Japan); Ardebili, M.; Bazarko, A.O.; Convery, M.R.; Ito, M.M.; Marlow, D.R.; McPherson, R.A.; Meyers, P.D.; Shoemaker, F.C.; Smith, A.J.; Stone, J.R. [Joseph Henry Laboratories, Princeton University, Princeton, New Jersey 08544 (United States); Aoki, M.; Blackmore, E.W.; Bergbusch, P.C.; Bryman, D.A.; Konaka, A.; Macdonald, J.A.; Mildenberger, J.; Numao, T.; Padley, P.; Poutissou, J.; Poutissou, R.; Redlinger, G.; Roy, J.; Turcot, A.S. [TRIUMF, 4004 Wesbrook Mall, Vancouver, British Columbia, Canada, V6T 2A3 (CANADA); Kitching, P.; Soluk, R. [Centre for Subatomic Research, University of Alberta, Edmonton, Alberta, Canada, T6G 2N5 (CANADA)

    1997-09-01

    An event consistent with the signature expected for the rare kaon decay K{sup +}{r_arrow}{pi}{sup +}{nu}{bar {nu}} has been observed. In the pion momentum region examined, 211{lt}P{lt}230 MeV/c , the backgrounds are estimated to contribute 0.08{plus_minus}0.03 events. If the event is due to K{sup +}{r_arrow}{pi}{sup +}{nu}{bar {nu}} , the branching ratio is 4.2{sup +9.7}{sub {minus}3.5}{times}10{sup {minus}10} . {copyright} {ital 1997} {ital The American Physical Society}

  11. Arrow-Elicited Cueing Effects at Short Intervals: Rapid Attentional Orienting or Cue-Target Stimulus Conflict?

    Science.gov (United States)

    Green, Jessica J.; Woldorff, Marty G.

    2012-01-01

    The observation of cueing effects (faster responses for cued than uncued targets) rapidly following centrally-presented arrows has led to the suggestion that arrows trigger rapid automatic shifts of spatial attention. However, these effects have primarily been observed during easy target-detection tasks when both cue and target remain on the…

  12. Organizational decentralization in radiology.

    Science.gov (United States)

    Aas, I H Monrad

    2006-01-01

    At present, most hospitals have a department of radiology where images are captured and interpreted. Decentralization is the opposite of centralization and means 'away from the centre'. With a Picture Archiving and Communication System (PACS) and broadband communications, transmitting radiology images between sites will be far easier than before. Qualitative interviews of 26 resource persons were performed in Norway. There was a response rate of 90%. Decentralization of radiology interpretations seems less relevant than centralization, but several forms of decentralization have a role to play. The respondents mentioned several advantages, including exploitation of capacity and competence. They also mentioned several disadvantages, including splitting professional communities and reduced contact between radiologists and clinicians. With the new technology decentralization and centralization of image interpretation are important possibilities in organizational change. This will be important for the future of teleradiology.

  13. Radiology illustrated. Hepatobiliary and pancreatic radiology

    Energy Technology Data Exchange (ETDEWEB)

    Choi, Byung Ihn (ed.) [Seoul National Univ. Hospital (Korea, Republic of). Dept. of Radiology

    2014-04-01

    Clear, practical guide to the diagnostic imaging of diseases of the liver, biliary tree, gallbladder, pancreas, and spleen. A wealth of carefully selected and categorized illustrations. Highlighted key points to facilitate rapid review. Aid to differential diagnosis. Radiology Illustrated: Hepatobiliary and Pancreatic Radiology is the first of two volumes that will serve as a clear, practical guide to the diagnostic imaging of abdominal diseases. This volume, devoted to diseases of the liver, biliary tree, gallbladder, pancreas, and spleen, covers congenital disorders, vascular diseases, benign and malignant tumors, and infectious conditions. Liver transplantation, evaluation of the therapeutic response of hepatocellular carcinoma, trauma, and post-treatment complications are also addressed. The book presents approximately 560 cases with more than 2100 carefully selected and categorized illustrations, along with key text messages and tables, that will allow the reader easily to recall the relevant images as an aid to differential diagnosis. At the end of each text message, key points are summarized to facilitate rapid review and learning. In addition, brief descriptions of each clinical problem are provided, followed by both common and uncommon case studies that illustrate the role of different imaging modalities, such as ultrasound, radiography, CT, and MRI.

  14. Radiology's value chain.

    Science.gov (United States)

    Enzmann, Dieter R

    2012-04-01

    A diagnostic radiology value chain is constructed to define its main components, all of which are vulnerable to change, because digitization has caused disaggregation of the chain. Some components afford opportunities to improve productivity, some add value, while some face outsourcing to lower labor cost and to information technology substitutes, raising commoditization risks. Digital image information, because it can be competitive at smaller economies of scale, allows faster, differential rates of technological innovation of components, initiating a centralization-to-decentralization technology trend. Digitization, having triggered disaggregation of radiology's professional service model, may soon usher in an information business model. This means moving from a mind-set of "reading images" to an orientation of creating and organizing information for greater accuracy, faster speed, and lower cost in medical decision making. Information businesses view value chain investments differently than do small professional services. In the former model, producing a better business product will extend image interpretation beyond a radiologist's personal fund of knowledge to encompass expanding external imaging databases. A follow-on expansion with integration of image and molecular information into a report will offer new value in medical decision making. Improved interpretation plus new integration will enrich and diversify radiology's key service products, the report and consultation. A more robust, information-rich report derived from a "systems" and "computational" radiology approach will be facilitated by a transition from a professional service to an information business. Under health care reform, radiology will transition its emphasis from volume to greater value. Radiology's future brightens with the adoption of a philosophy of offering information rather than "reads" for decision making. Staunchly defending the status quo via turf wars is unlikely to constitute a

  15. Radiological worker training

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1998-10-01

    This Handbook describes an implementation process for core training as recommended in Implementation Guide G441.12, Radiation Safety Training, and as outlined in the DOE Radiological Control Standard (RCS). The Handbook is meant to assist those individuals within the Department of Energy, Managing and Operating contractors, and Managing and Integrating contractors identified as having responsibility for implementing core training recommended by the RCS. This training is intended for radiological workers to assist in meeting their job-specific training requirements of 10 CFR 835. While this Handbook addresses many requirements of 10 CFR 835 Subpart J, it must be supplemented with facility-specific information to achieve full compliance.

  16. Westinghouse radiological containment guide

    Energy Technology Data Exchange (ETDEWEB)

    Aitken, S.B. [Idaho National Engineering Lab., Idaho Falls, ID (United States); Brown, R.L. [Westinghouse Hanford Co., Richland, WA (United States); Cantrell, J.R. [Westinghouse Savannah River Co., Aiken, SC (United States); Wilcox, D.P. [West Valley Nuclear Services Co., Inc., West Valley, NY (United States)

    1994-03-01

    This document provides uniform guidance for Westinghouse contractors on the implementation of radiological containments. This document reflects standard industry practices and is provided as a guide. The guidance presented herein is consistent with the requirements of the DOE Radiological Control Manual (DOE N 5480.6). This guidance should further serve to enable and encourage the use of containments for contamination control and to accomplish the following: Minimize personnel contamination; Prevent the spread of contamination; Minimize the required use of protective clothing and personal protective equipment; Minimize the generation of waste.

  17. Radiological sciences dictionary

    CERN Document Server

    Dowsett, David

    2009-01-01

    The Radiological Sciences Dictionary is a rapid reference guide for all hospital staff employed in diagnostic imaging, providing definitions of over 3000 keywords as applied to the technology of diagnostic radiology.Written in a concise and easy to digest form, the dictionary covers a wide variety of subject matter, including:· radiation legislation and measurement · computing and digital imaging terminology· nuclear medicine radionuclides and radiopharmaceuticals· radiographic contrast agents (x-ray, MRI and ultrasound)· definitions used in ultrasound and MRI technology· statistical exp

  18. Archery by the Apaches – implications of using the bow and arrow in hunter-gatherer communities

    Directory of Open Access Journals (Sweden)

    Žiga Šmit

    2016-12-01

    Full Text Available This review focuses on the technical and social details of production, training, and use of archery equipment by a Native American tribe, the Apaches. The study aims to understand the use of the bow in the Mesolithic and Early and Middle Neolithic societies of the Old World. The paper further describes arrow ballistics. An arrow and bow with similar dimensions and materials to those used by the Apaches was reconstructed and used in ballistic experiments. Shooting and the subsequent model calculation showed that the effective range of arrows made of reed and projected by a bow of medium strength (16–18kg was not more than approx. 20m. Due to the initial flat part of the ballistic trajectory, such arrows were quite efficient in close-range contests. Within the model calculation, a regression procedure was introduced to determine the arrow air-drag parameters from an ensemble of shots.

  19. Poul Erik Andersen's radiological work on Osteochondrodysplasias and interventional radiology

    DEFF Research Database (Denmark)

    Andersen, Poul Erik

    2011-01-01

    Hospital. His significant experience and extensive scientific work has led to many posts in the Danish Society of Interventional Radiology, the European Society of Radiology and the Cardiovascular and Interventional Radiological Society of Europe, where he is a fellow and has passed the European Board...

  20. Radiologic quality and safety: mapping value into radiology.

    Science.gov (United States)

    Swensen, Stephen J; Johnson, C Daniel

    2005-12-01

    The authors have created a radiology quality map to help understand the opportunities for improvement in the radiologic safety, reliability, quality, and appropriateness of examinations and interventions. It entails 9 steps with dozens of specific opportunities for improving care to patients. The radiology profession has an obligation to robustly document and improve quality and safety in its practice.

  1. A Note on a Broken-Cycle Theorem for Hypergraphs

    Directory of Open Access Journals (Sweden)

    Trinks Martin

    2014-08-01

    Full Text Available Whitney’s Broken-cycle Theorem states the chromatic polynomial of a graph as a sum over special edge subsets. We give a definition of cycles in hypergraphs that preserves the statement of the theorem there

  2. 324 Building Baseline Radiological Characterization

    Energy Technology Data Exchange (ETDEWEB)

    R.J. Reeder, J.C. Cooper

    2010-06-24

    This report documents the analysis of radiological data collected as part of the characterization study performed in 1998. The study was performed to create a baseline of the radiological conditions in the 324 Building.

  3. Radiological Approach to Forefoot Pain

    Directory of Open Access Journals (Sweden)

    Sai Chung Ho

    2015-06-01

    Full Text Available Forefoot pain is a common clinical complaint in orthopaedic practice. In this article, we discuss the anatomy of the forefoot, clinical and radiological approaches to forefoot pain, and common painful forefoot disorders and their associated radiological features.

  4. Paediatric musculoskeletal interventional radiology

    Science.gov (United States)

    Paolantonio, Guglielmo; Fruhwirth, Rodolfo; Alvaro, Giuseppe; Parapatt, George K; Toma', Paolo; Rollo, Massimo

    2016-01-01

    Interventional radiology technique is now well established and widely used in the adult population. Through minimally invasive procedures, it increasingly replaces surgical interventions that involve higher percentages of invasiveness and, consequently, of morbidity and mortality. For these advantageous reasons, interventional radiology in recent years has spread to the paediatric age as well. The aim of this study was to review the literature on the development, use and perspectives of these procedures in the paediatric musculoskeletal field. Several topics are covered: osteomuscle neoplastic malignant and benign pathologies treated with invasive diagnostic and/or therapeutic procedures such as radiofrequency ablation in the osteoid osteoma; invasive and non-invasive procedures in vascular malformations; treatment of aneurysmal bone cysts; and role of interventional radiology in paediatric inflammatory and rheumatic inflammations. The positive results that have been generated with interventional radiology procedures in the paediatric field highly encourage both the development of new ad hoc materials, obviously adapted to young patients, as well as the improvement of such techniques, in consideration of the fact that childrens' pathologies do not always correspond to those of adults. In conclusion, as these interventional procedures have proven to be less invasive, with lower morbidity and mortality rates as well, they are becoming a viable and valid alternative to surgery in the paediatric population. PMID:26235144

  5. Radiologic Technology Program Guide.

    Science.gov (United States)

    Georgia Univ., Athens. Dept. of Vocational Education.

    This guide presents the standard curriculum for technical institutes in Georgia. The curriculum addresses the minimum competencies for a radiologic technology program. The guide contains four major sections. The General Information section contains an introduction giving an overview and defining purpose and objectives; a program description,…

  6. Radiological Safety Handbook.

    Science.gov (United States)

    Army Ordnance Center and School, Aberdeen Proving Ground, MD.

    Written to be used concurrently with the U.S. Army's Radiological Safety Course, this publication discusses the causes, sources, and detection of nuclear radiation. In addition, the transportation and disposal of radioactive materials are covered. The report also deals with the safety precautions to be observed when working with lasers, microwave…

  7. Offline detection of broken rotor bars in AC induction motors

    Science.gov (United States)

    Powers, Craig Stephen

    ABSTRACT. OFFLINE DETECTION OF BROKEN ROTOR BARS IN AC INDUCTION MOTORS. The detection of the broken rotor bar defect in medium- and large-sized AC induction machines is currently one of the most difficult tasks for the motor condition and monitoring industry. If a broken rotor bar defect goes undetected, it can cause a catastrophic failure of an expensive machine. If a broken rotor bar defect is falsely determined, it wastes time and money to physically tear down and inspect the machine only to find an incorrect diagnosis. Previous work in 2009 at Baker/SKF-USA in collaboration with the Korea University has developed a prototype instrument that has been highly successful in correctly detecting the broken rotor bar defect in ACIMs where other methods have failed. Dr. Sang Bin and his students at the Korea University have been using this prototype instrument to help the industry save money in the successful detection of the BRB defect. A review of the current state of motor conditioning and monitoring technology for detecting the broken rotor bar defect in ACIMs shows improved detection of this fault is still relevant. An analysis of previous work in the creation of this prototype instrument leads into the refactoring of the software and hardware into something more deployable, cost effective and commercially viable.

  8. Broken Ergodicity in Two-Dimensional Homogeneous Magnetohydrodynamic Turbulence

    Science.gov (United States)

    Shebalin, John V.

    2010-01-01

    Two-dimensional (2-D) homogeneous magnetohydrodynamic (MHD) turbulence has many of the same qualitative features as three-dimensional (3-D) homogeneous MHD turbulence.The se features include several ideal invariants, along with the phenomenon of broken ergodicity. Broken ergodicity appears when certain modes act like random variables with mean values that are large compared to their standard deviations, indicating a coherent structure or dynamo.Recently, the origin of broken ergodicity in 3-D MHD turbulence that is manifest in the lowest wavenumbers was explained. Here, a detailed description of the origins of broken ergodicity in 2-D MHD turbulence is presented. It will be seen that broken ergodicity in ideal 2-D MHD turbulence can be manifest in the lowest wavenumbers of a finite numerical model for certain initial conditions or in the highest wavenumbers for another set of initial conditions.T he origins of broken ergodicity in ideal 2-D homogeneous MHD turbulence are found through an eigen analysis of the covariance matrices of the modal probability density functions.It will also be shown that when the lowest wavenumber magnetic field becomes quasi-stationary, the higher wavenumber modes can propagate as Alfven waves on these almost static large-scale magnetic structures

  9. Ethical problems in radiology: radiological consumerism.

    Science.gov (United States)

    Magnavita, N; Bergamaschi, A

    2009-10-01

    One of the causes of the increasing request for radiological examinations occurring in all economically developed countries is the active role played by the patient-consumer. Consumerism places the radiologist in an ethical dilemma, between the principle of autonomy on the one hand and the ethical principles of beneficence, nonmaleficence and justice on the other. The choice made by radiologists in moral dilemmas is inspired by an adherence to moral principles, which in Italy and elsewhere refer to the Judaeo-Christian tradition or to neo-Darwinian relativism. Whatever the choice, the radiologist is bound to adhere to that choice and to provide the patient with all the relevant information regarding his or her state of health.

  10. Making Sense of the Arrow-Pushing Formalism among Chemistry Majors Enrolled in Organic Chemistry

    Science.gov (United States)

    Ferguson, Robert; Bodner, George M.

    2008-01-01

    This paper reports results of a qualitative study of sixteen students enrolled in a second year organic chemistry course for chemistry and chemical engineering majors. The focus of the study was student use of the arrow-pushing formalism that plays a central role in both the teaching and practice of organic chemistry. The goal of the study was to…

  11. Ballistic parameters and trauma potential of carbon dioxide-actuated arrow pistols.

    Science.gov (United States)

    Nguyen, Tien Thanh; Grossjohann, Rico; Ekkernkamp, Axel; Bockholdt, Britta; Frank, Matthias

    2015-05-01

    Medical literature abounds with reports of injuries and fatalities caused by arrows and crossbow bolts. Crossbows are of particular forensic and traumatological interest, because their mode of construction allows for temporary mechanical storage of energy. A newly developed type of pistol (Arcus Arrowstar), which belongs to the category of air and carbon dioxide weapons, discharges arrow-shaped bolts actuated by carbon dioxide cylinders. As, to the best of the authors' knowledge, literature contains no information on this uncommon subclass of weapons it is the aim of this work to provide the experimental data and to assess the trauma potential of these projectiles based on the ascertained physical parameters. Basic kinetic parameters of these carbon dioxide-actuated bolts (velocity v = 39 m/s, energy E = 7.2 J, energy density E' = 0.26 J/mm(2)) are similar to bolts discharged by pistol crossbows. Subsequent firing resulted in a continuous and fast decrease in kinetic energy of the arrows. Test shots into ballistic soap blocks reveal a high penetration capacity, especially when compared to conventional projectiles of equal kinetic energy values (like, e.g., airgun pellets). To conclude, these data demonstrate the high efficiency of arrow-shaped projectiles, which are also characterized by a high cross-sectional density (ratio of mass to cross-sectional area of a projectile).

  12. Polarization of cumulative protons in the reaction. gamma. A r arrow pX

    Energy Technology Data Exchange (ETDEWEB)

    Avakyan, R.O.; Avetisyan, A.E.; Arestakesyan, G.A.; Bartikyan, M.V.; Garibyan, Y.A.; Grigoryan, A.E.; Eganov, V.S.; Karapetyan, A.P.; Karapetyan, M.P.; Keropyan, I.A.; and others

    1989-02-01

    The polarization of cumulative protons has been measured in the reaction {gamma}{ital A}{r arrow}{ital pX} in the proton-energy region 170--270 MeV for C and Sn nuclei in bremsstrahlung beams produced by 4.5- and 1.5-GeV electrons. The measured polarization value is close to zero.

  13. Six Impossible Mechanisms before Breakfast: Arrow Pushing as an Instructional Device in Inorganic Chemistry

    Science.gov (United States)

    Berg, Steffen; Ghosh, Abhik

    2013-01-01

    In a recent article by the authors, the suggestion was made that arrow pushing, a widely used tool in organic chemistry, could also be profitably employed in the teaching of introductory inorganic chemistry. A number of relatively simple reactions were used to illustrate this thesis, raising the question whether the same approach might rationalize…

  14. Decorating with Arrows: Toward the Development of Representational Competence in Organic Chemistry

    Science.gov (United States)

    Grove, Nathaniel P.; Cooper, Melanie M.; Rush, Kelli M.

    2012-01-01

    Much effort has been expended in developing improved methods for presenting mechanistic thinking and the curved-arrow notation to organic chemistry students; however, most of these techniques are not research-based. The little research that has been conducted has mainly focused on understanding the meaning that students associate with the…

  15. Physical and cognitive task analysis in interventional radiology

    Energy Technology Data Exchange (ETDEWEB)

    Johnson, S. [School of Psychology, University of Liverpool, Liverpool (United Kingdom)]. E-mail: sheenajj@liv.ac.uk; Healey, A. [Royal Liverpool University Hospital, Liverpool (United Kingdom); Evans, J. [Royal Liverpool University Hospital, Liverpool (United Kingdom); Murphy, M. [Royal Liverpool University Hospital, Liverpool (United Kingdom); Crawshaw, M. [Department of Psychology, University of Hull, Hull (United Kingdom); Gould, D. [Royal Liverpool University Hospital, Liverpool (United Kingdom)

    2006-01-15

    AIM: To identify, describe and detail the cognitive thought processes, decision-making, and physical actions involved in the preparation and successful performance of core interventional radiology procedures. MATERIALS AND METHODS: Five commonly performed core interventional radiology procedures were selected for cognitive task analysis. Several examples of each procedure being performed by consultant interventional radiologists were videoed. The videos of those procedures, and the steps required for successful outcome, were analysed by a psychologist and an interventional radiologist. Once a skeleton algorithm of the procedures was defined, further refinement was achieved using individual interview techniques with consultant interventional radiologists. Additionally a critique of each iteration of the established algorithm was sought from non-participating independent consultant interventional radiologists. RESULTS: Detailed task descriptions and decision protocols were developed for five interventional radiology procedures (arterial puncture, nephrostomy, venous access, biopsy-using both ultrasound and computed tomography, and percutaneous transhepatic cholangiogram). Identical tasks performed within these procedures were identified and standardized within the protocols. CONCLUSIONS: Complex procedures were broken down and their constituent processes identified. This might be suitable for use as a training protocol to provide a universally acceptable safe practice at the most fundamental level. It is envisaged that data collected in this way can be used as an educational resource for trainees and could provide the basis for a training curriculum in interventional radiology. It will direct trainees towards safe practice of the highest standard. It will also provide performance objectives of a simulator model.

  16. Radiation exposure and radiological protection in interventional radiological procedures with special attention to neurointerventional radiology

    Energy Technology Data Exchange (ETDEWEB)

    Okamoto, Kouichirou; Sakai, Kunio [Niigata Univ. (Japan). School of Medicine; Yoshimura, Shutaro; Oka, Tetsuya; Ito, Jusuke

    2000-11-01

    It is necessary to interventional radiologists to understand the system of radiological protection recommended by the International Commission on Radiological Protection: justification, optimization, and individual dose and risk limits. Estimation and measurements of the radiation exposure to patients and personnel are important for radiological protection to avoid radiation injuries, such as temporal epilation and cataract. The practical principle of ALARA (as low as reasonably achievable) should be kept in any interventional radiological procedure. (author)

  17. The Comet With a Broken Heart

    Science.gov (United States)

    2006-04-01

    ). Fragment B seems to have fragmented again, bringing the total of fragments close to 40, some being most probably very small, boulder-sized objects with irregular and short-lived activity. The new observations reveal that this new small fragment has split again! The image clearly reveals that below the main B fragment, there is a small fragment that is divided into two and a careful analysis reveals five more tiny fragments almost aligned. Thus, this image alone shows at least 7 fragments. The comet has thus produced a whole set of mini-comets! ESO PR Photo 15b/06 ESO PR Photo 15b/06 Broken Fragments of Comet SW-3 Will the process continue? Will more and more fragments form and will the comet finally disintegrate? How bright will the fragments be when the comet will be the closest to the Earth, on 11 to 14 May, and how many new fragments will have appeared before the comet reaches its closest approach to the Sun, around 7 June? Fragment C of the comet should be the closest to Earth on 11 May, when it will be about 12 million km away, while fragment B will come as 'close' as 10 million km from Earth on 14 May. Although this is the closest a comet ever approached Earth in more than twenty years - even Comet Hyakutake's smallest distance was 15 million km - this is still 26 times the distance between the Earth and the Moon and therefore does not pose any threat to our planet. ESO PR Photo 15/06 ESO PR Photo 15c/06 Mini-Comets coming off Comet SW-3 If nothing else happens, at the time of closest approach, fragment B will be just visible with unaided eye by experienced observers. It should be an easy target however to observe with binoculars. If we are lucky, however, fragment B presents another outburst, becoming a magnificent sight in the night sky. On the other hand, it could just as well fade away into oblivion. But then, the main fragment C should still be visible, even possibly with the unaided eye. ESO telescopes will observe the comet in the greatest detail at the end of

  18. Data mining in radiology.

    Science.gov (United States)

    Kharat, Amit T; Singh, Amarjit; Kulkarni, Vilas M; Shah, Digish

    2014-04-01

    Data mining facilitates the study of radiology data in various dimensions. It converts large patient image and text datasets into useful information that helps in improving patient care and provides informative reports. Data mining technology analyzes data within the Radiology Information System and Hospital Information System using specialized software which assesses relationships and agreement in available information. By using similar data analysis tools, radiologists can make informed decisions and predict the future outcome of a particular imaging finding. Data, information and knowledge are the components of data mining. Classes, Clusters, Associations, Sequential patterns, Classification, Prediction and Decision tree are the various types of data mining. Data mining has the potential to make delivery of health care affordable and ensure that the best imaging practices are followed. It is a tool for academic research. Data mining is considered to be ethically neutral, however concerns regarding privacy and legality exists which need to be addressed to ensure success of data mining.

  19. Data mining in radiology

    Directory of Open Access Journals (Sweden)

    Amit T Kharat

    2014-01-01

    Full Text Available Data mining facilitates the study of radiology data in various dimensions. It converts large patient image and text datasets into useful information that helps in improving patient care and provides informative reports. Data mining technology analyzes data within the Radiology Information System and Hospital Information System using specialized software which assesses relationships and agreement in available information. By using similar data analysis tools, radiologists can make informed decisions and predict the future outcome of a particular imaging finding. Data, information and knowledge are the components of data mining. Classes, Clusters, Associations, Sequential patterns, Classification, Prediction and Decision tree are the various types of data mining. Data mining has the potential to make delivery of health care affordable and ensure that the best imaging practices are followed. It is a tool for academic research. Data mining is considered to be ethically neutral, however concerns regarding privacy and legality exists which need to be addressed to ensure success of data mining.

  20. Microcephaly: a radiological review

    Energy Technology Data Exchange (ETDEWEB)

    Tarrant, Ailbhe; Garel, Catherine; Germanaud, David; Lenoir, Marion; Pointe, Hubert Ducou le [Universite Paris VI Pierre et Marie Curie, Radiology Department, Hopital d' Enfants Armand-Trousseau, Paris (France); Villemeur, Thierry Billette de; Mignot, Cyril [Universite Paris V Rene Descartes, CNRS (UMR 8104), Inserm, U567, Institut Cochin, Paris (France); Universite Paris VI Pierre et Marie Curie, Paediatric Neurology Department, Hopital d' Enfants Armand-Trousseau, Paris (France)

    2009-08-15

    Microcephaly results from inadequate brain growth during development. It may develop in utero, and therefore be present at birth, or may develop later as a result of perinatal events or postnatal conditions. The aetiology of microcephaly may be congenital (secondary to cerebral malformations or metabolic abnormalities) or acquired, most frequently following an ischaemic insult. This distinct radiological and pathological entity is reviewed with a specific focus on aetiology. (orig.)

  1. Radiological safety and control

    Energy Technology Data Exchange (ETDEWEB)

    Chang, Sea Young; Yoo, Y. S.; Lee, J. C.; Lee, T. Y.; Lee, J. L.; Kim, B. W.; Lee, B. J.; Chung, K. K.; Chung, R. I.; Kim, J. S.; Lee, H. S.; Han, Y. D.; Lee, J. I.; Lee, K. C.; Yoon, J. H.; Sul, C. W.; Kim, C. K.; Yoon, K. S.; Seo, K. W.; Yoon, Y. C. [Korea Atomic Energy Research Institute, Taejon (Korea, Republic of)

    1996-01-01

    This report describes the annual results of radiological safety and control program of 1995. This program consists of working area monitoring including HANARO, personnel radiation monitoring, education for radiation protection. As a result, the objectives of radiation protection have been achieved satisfactorily through the activities mentioned above. Also, the calibration services were provided to insure accurate radiation measurement in the radiation working places. 21 figs., 39 tabs., 5 refs. (Author) .new.

  2. Disabling Radiological Dispersal Terror

    Energy Technology Data Exchange (ETDEWEB)

    Hart, M

    2002-11-08

    Terror resulting from the use of a radiological dispersal device (RDD) relies upon an individual's lack of knowledge and understanding regarding its significance. Disabling this terror will depend upon realistic reviews of the current conservative radiation protection regulatory standards. It will also depend upon individuals being able to make their own informed decisions merging perceived risks with reality. Preparation in these areas will reduce the effectiveness of the RDD and may even reduce the possibility of its use.

  3. Pitfalls in diagnostic radiology

    Energy Technology Data Exchange (ETDEWEB)

    Peh, Wilfred C.G. (ed.) [Khoo Teck Puat Hospital (Singapore). Dept. of Diagnostic Radiology

    2015-04-01

    Only textbook to focus primarily on the topic of pitfalls in diagnostic radiology. Highlights the pitfalls in a comprehensive and systematic manner. Written by experts in different imaging modalities and subspecialties from reputable centers across the world. The practice of diagnostic radiology has become increasingly complex, with the use of numerous imaging modalities and division into many subspecialty areas. It is becoming ever more difficult for subspecialist radiologists, general radiologists, and residents to keep up with the advances that are occurring year on year, and this is particularly true for less familiar topics. Failure to appreciate imaging pitfalls often leads to diagnostic error and misinterpretation, and potential medicolegal problems. Diagnostic errors may be due to various factors such as inadequate imaging technique, imaging artifacts, failure to recognize normal structures or variants, lack of correlation with clinical and other imaging findings, and poor training or inexperience. Many, if not most, of these factors are potentially recognizable, preventable, or correctable. This textbook, written by experts from reputable centers across the world, systematically and comprehensively highlights the pitfalls that may occur in diagnostic radiology. Both pitfalls specific to different modalities and techniques and those specific to particular organ systems are described with the help of numerous high-quality illustrations. Recognition of these pitfalls is crucial in helping the practicing radiologist to achieve a more accurate diagnosis.

  4. Bifurcation and catastrophe of seepage flow system in broken rock

    Institute of Scientific and Technical Information of China (English)

    MIAO Xie-xing; LI Shun-cai; CHEN Zhan-qing

    2009-01-01

    The study of dynamical behavior of water or gas flows in broken rock is a basic research topic among a series of key projects about stability control of the surrounding rocks in mines and the prevention of some disasters such as water inrush or gas outburst and the protection of the groundwater resource. It is of great theoretical and engineering importance in respect of promo-tion of security in mine production and sustainable development of the coal industry. According to the non-Darcy property of seepage flow in broken rock dynamic equations of non-Darcy and non-steady flows in broken rock are established. By dimensionless transformation, the solution diagram of steady-states satisfying the given boundary conditions is obtained. By numerical analysis of low relaxation iteration, the dynamic responses corresponding to the different flow parameters have been obtained. The stability analysis of the steady-states indicate that a saddle-node bifurcaton exists in the seepage flow system of broken rock. Consequently, using catastrophe theory, the fold catastrophe model of seepage flow instability has been obtained. As a result, the bifurcation curves of the seepage flow systems with different control parameters are presented and the standard potential function is also given with respect to the generalized state variable for the fold catastrophe of a dynamic system of seepage flow in broken rock.

  5. Broken-Rotor-Bar Diagnosis for Induction Motors

    Science.gov (United States)

    Wang, Jinjiang; Gao, Robert X.; Yan, Ruqiang

    2011-07-01

    Broken rotor bar is one of the commonly encountered induction motor faults that may cause serious motor damage to the motor if not detected timely. Past efforts on broken rotor bar diagnosis have been focused on current signature analysis using spectral analysis and wavelet transform. These methods require accurate slip estimation to localize fault-related frequency. This paper presents a new approach to broken rotor bar diagnosis without slip estimation, based on the ensemble empirical mode decomposition (EEMD) and the Hilbert transform. Specifically, the Hilbert transform first extracts the envelope of the motor current signal, which contains broken rotor fault-related frequency information. Subsequently, the envelope signal is adaptively decomposed into a number of intrinsic mode functions (IMFs) by the EEMD algorithm. Two criteria based on the energy and correlation analyses have been investigated to automate the IMF selection. Numerical and experimental studies have confirmed that the proposed approach is effective in diagnosing broken rotor bar faults for improved induction motor condition monitoring and damage assessment.

  6. Neutrino Mixing: from the Broken \\mu-\\tau Symmetry to the Broken Friedberg-Lee Symmetry

    CERN Document Server

    Xing, Z

    2007-01-01

    I argue that the observed flavor structures of leptons and quarks might imply the existence of certain flavor symmetries. The latter should be a good starting point to build realistic models towards deeper understanding of the fermion mass spectra and flavor mixing patterns. The \\mu-\\tau permutation symmetry serves for such an example to interpret the almost maximal atmospheric neutrino mixing angle (\\theta_23 \\sim 45^\\circ) and the strongly suppressed CHOOZ neutrino mixing angle (\\theta_13 < 10^\\circ). In this talk I like to highlight a new kind of flavor symmetry, the Friedberg-Lee symmetry, for the effective Majorana neutrino mass operator. Luo and I have shown that this symmetry can be broken in an oblique way, such that the lightest neutrino remains massless but an experimentally-favored neutrino mixing pattern is achievable. We get a novel prediction for \\theta_13 in the CP-conserving case: \\sin\\theta_13 = \\tan\\theta_12 |(1- \\tan\\theta_23)/ (1+ \\tan\\theta_{23})|. Our scenario can simply be generalize...

  7. Neutrino Mixing:. from the Broken μ-τ Symmetry to the Broken Friedberg-Lee Symmetry

    Science.gov (United States)

    Xing, Zhi-Zhong

    I argue that the observed flavor structures of leptons and quarks might imply the existence of certain flavor symmetries. The latter should be a good starting point to build realistic models towards deeper understanding of the fermion mass spectra and flavor mixing patterns. The μ-τ permutation symmetry serves for such an example to interpret the almost maximal atmospheric neutrino mixing angle (θ23 ~ 45°) and the strongly suppressed CHOOZ neutrino mixing angle (θ13 Friedberg-Lee symmetry, for the effective Majorana neutrino mass operator. Luo and I have shown that this symmetry can be broken in an oblique way, such that the lightest neutrino remains massless but an experimentally-favored neutrino mixing pattern is achievable. We get a novel prediction for θ13 in the CP-conserving case: sinθ13 = tanθ12|(1 - tanθ23)/(1 + tanθ23)|. Our scenario can simply be generalized to accommodate CP violation and be combined with the seesaw mechanism. Finally I stress the importance of probing possible effects of μ-τ symmetry breaking either in terrestrial neutrino oscillation experiments or with ultrahigh-energy cosmic neutrino telescopes.

  8. Improved upper limits on B(K{sub L}{sup 0} {r_arrow} {mu}e) and B(K{sub L}{sup 0} {r_arrow} ee) and a new value for B(K{sub L}{sup 0} {r_arrow} {mu}{mu})

    Energy Technology Data Exchange (ETDEWEB)

    Molzon, W.R.

    1998-09-01

    The author gives recent results from E791 at BNL with improved upper limits on the branching fractions B(K{sub L}{sup 0} {r_arrow} {mu}e) and B(K{sub L}{sup 0} {r_arrow} ee) of 8.5 {times} 10{sup {minus}11} and 11.6 {times} 10{sup {minus}11} at 90% C.L. He also gives a preliminary result of a new measurement B(K{sub L}{sup 0} {r_arrow} {mu}{mu}) = 7.6 {+-} 0.5(stat) {+-} 0.4(syst) {times} 10{sup {minus}9}.

  9. Misunderstanding that the Effective Action is Convex under Broken Symmetry

    CERN Document Server

    Asanuma, Nobu-Hiko

    2016-01-01

    The widespread belief that the effective action is convex and has a flat bottom under broken global symmetry is shown to be wrong. We show spontaneous symmetry breaking necessarily accompanies non-convexity in the effective action for quantum field theory, or in the free energy for statistical mechanics, and clarify the magnitude of non-convexity. For quantum field theory, it is also explicitly proved that translational invariance breaks spontaneously when the system is in the non-convex region, and that different vacua of spontaneously broken symmetry cannot be superposed. As applications of non-convexity, we study the first-order phase transition which happens at the zero field limit of spontaneously broken symmetry, and we propose a simple model of phase coexistence which obeys the Born rule.

  10. Strongly broken Peccei-Quinn symmetry in the early Universe

    Energy Technology Data Exchange (ETDEWEB)

    Takahashi, Fuminobu [Department of Physics, Tohoku University,Sendai, Miyagi 980-8578 (Japan); Kavli IPMU (WPI), TODIAS, The University of Tokyo,Kashiwa, Chiba 277-8583 (Japan); Yamada, Masaki [Kavli IPMU (WPI), TODIAS, The University of Tokyo,Kashiwa, Chiba 277-8583 (Japan); Institute for Cosmic Ray Research, ICRR, The University of Tokyo,Kashiwa, Chiba 277-8582 (Japan)

    2015-10-06

    We consider QCD axion models where the Peccei-Quinn symmetry is badly broken by a larger amount in the past than in the present, in order to avoid the axion isocurvature problem. Specifically we study supersymmetric axion models where the Peccei-Quinn symmetry is dynamically broken by either hidden gauge interactions or the SU(3){sub c} strong interactions whose dynamical scales are temporarily enhanced by the dynamics of flat directions. The former scenario predicts a large amount of self-interacting dark radiation as the hidden gauge symmetry is weakly coupled in the present Universe. We also show that the observed amount of baryon asymmetry can be generated by the QCD axion dynamics via spontaneous baryogenesis. We briefly comment on the case in which the PQ symmetry is broken by a non-minimal coupling to gravity.

  11. Experimental Study on the Porosity Creep Properties of Broken Limestone

    Directory of Open Access Journals (Sweden)

    Li Shun-cai

    2016-01-01

    Full Text Available In the underground engineering, the long-term stability of the surrounding rocks (especially the broken rocks containing water and the ground settlement resulted from the seepage-creep coupling above goaf have been the important research subjects concerning the deep mining. For the broken rock, its porosity is an important structural parameter determining its creep properties, and the porosity change rate is more superior to describe the creep characteristics compared with the strain change rate at a certain direction. In this paper, MTS815.02 Rock Mechanics Test System is used to carry out the creep experiments on water-saturated broken limestone, and then the time curves of porosity and of the porosity change rate are obtained. By regression, we have got the relation equation between the porosity change rate with the instant porosity and the stress level during the creep. The study indicates that when the stress retains a constant level, the relation between the porosity change rate and the instant porosity can be fitted with a cubical polynomial. The obtained creep relation equation between the porosity change rate and the instant porosity and the instant stress provides a necessary state equation for studying the coupling between the seepage and the creep of the broken rock. Furthermore, the seepage in the broken rock has been verified to satisfy the Forchheimer’s non-Darcy flow according to our previous studies, and its seepage properties, k, β and ca can all be expressed respectively as the polynomial of the porosity, so, by combining with these three state equations we have obtained the four essential state equations for solving the coupling problems of the seepage and the creep for the broken rocks.

  12. Elastoconductivity as a probe of broken mirror symmetries

    Energy Technology Data Exchange (ETDEWEB)

    Hlobil, Patrik; Maharaj, Akash V.; Hosur, Pavan; Shapiro, M. C.; Fisher, I. R.; Raghu, S.

    2015-07-27

    We propose the possible detection of broken mirror symmetries in correlated two-dimensional materials by elastotransport measurements. Using linear response theory we calculate the“shear conductivity” Γ x x , x y , defined as the linear change of the longitudinal conductivity σ x x due to a shear strain ε x y . This quantity can only be nonvanishing when in-plane mirror symmetries are broken and we discuss how candidate states in the cuprate pseudogap regime (e.g., various loop current or charge orders) may exhibit a finite shear conductivity. We also provide a realistic experimental protocol for detecting such a response.

  13. Phaeocroides Nanus (Arrow), Phaeocroides Mapellii Petrovitz and Phaeocroides Orientalis (Petrovitz): notes on Generic status, synonymy and types; redescriptions (Coleoptera: Hybosoridae)

    NARCIS (Netherlands)

    Kuijten, P.J.

    1988-01-01

    Phaeochrous nanus Arrow is transferred to Phaeocroides (comb. nov.); Phaeocroides mapellii Petrovitz is a synonym (syn. nov.). Commentaries on the types and spelling of the generic name, differences from the other Indian genera and redescriptions are given.

  14. Search for the decay [ital D][sup 0][r arrow][mu][sup +][mu][sup [minus

    Energy Technology Data Exchange (ETDEWEB)

    Mishra, C.S.; Brown, C.N.; Cooper, W.E.; Gounder, K. (Fermilab, P.O. Box 500, Batavia, Illinois 60510 (United States)); Kaplan, D.M.; Martin, V.M.; Preston, R.S.; Sa, J.; Tanikella, V. (Northern Illinois University, DeKalb, Illinois 60115 (United States)); Isenhower, L.D.; Sadler, M.E.; Schnathorst, R. (Abilene Christian University, Abilene, Texas 79699 (United States)); Lederman, L.M.; Schub, M.H. (University of Chicago, Chicago, Illinois 60637 (United States)); Gidal, G.; Kowitt, M.S.; Luk, K.B. (Lawrence Berkeley Laboratory and University of California, Berkeley, California 94720 (United States)); Carey, T.A.; Jeppesen, R.E.; Kapustinsky, J.S.; Lane, D.W.; Leitch, M.J.; Lillberg, J.W.; McGaughey, P.L.; Moss, J.M.; Peng, J.C. (Los Alamos National Laboratory, Los Alamos, New Mexico 87545 (United States)); Childers, R.L.; Darden, C.W. (University of South Carolina, Columbia, South Carolina 29208 (United States)); Teng, P.K. (Institute of Physics, Academia Sinica, Taipei (Taiwan

    1994-07-01

    Using a silicon-microstrip detector array to identify secondary vertices occurring downstream of a short platinum target, we have searched for the decay [ital D][sup 0][r arrow][mu][sup +][mu][sup [minus

  15. The facile synthesis of single crystalline palladium arrow-headed tripods and their application in formic acid electro-oxidation.

    Science.gov (United States)

    Su, Na; Chen, Xueying; Ren, Yuanhang; Yue, Bin; Wang, Han; Cai, Wenbin; He, Heyong

    2015-04-28

    Single crystalline palladium arrow-headed tripods prepared via a simple one-pot strategy exhibit high electro-activity in formic acid oxidation, which could be a promising anodic catalyst for direct formic acid fuel cells.

  16. High Statistics Measurement of B arrow Λc X and Σc X

    Science.gov (United States)

    Wappler, Frank

    1997-04-01

    This analysis is based on about 5 fb-1 of data recorded by the CLEO II detector operating at CESR on the Υ(4S) resonance and at center-of-mass energies just below the threshold for the production of B\\overlineB mesons. The first observation of the inclusive decays B arrow Λ_c^+ X, Σ_c^0 X and Σ_c^++X has already been reported by ARGUS (1988) and CLEO (1992). We now present a high statistics measurement of these decay modes. Improved values for branching fractions and momentum spectra will be presented. Results of the search for the inclusive decay B arrow Σ_c^+ X, which has not yet been observed, will also be presented.

  17. Radiological aspects of Gaucher disease

    Energy Technology Data Exchange (ETDEWEB)

    Katz, Robert; Booth, Tom; Hargunani, Rikin; Wylie, Peter; Holloway, Brian [Royal Free Hospital, Radiology Department, London (United Kingdom)

    2011-12-15

    Advances in imaging and the development of commercially available enzyme therapy have significantly altered the traditional radiology of Gaucher disease. The cost of treatment and need for monitoring response to therapy have magnified the importance of imaging. There are no recent comprehensive reviews of the radiology of this relatively common lysosomal storage disease. This article describes the modern imaging, techniques and radiological manifestations of Gaucher disease. (orig.)

  18. Renewal of radiological equipment.

    Science.gov (United States)

    2014-10-01

    In this century, medical imaging is at the heart of medical practice. Besides providing fast and accurate diagnosis, advances in radiology equipment offer new and previously non-existing options for treatment guidance with quite low morbidity, resulting in the improvement of health outcomes and quality of life for the patients. Although rapid technological development created new medical imaging modalities and methods, the same progress speed resulted in accelerated technical and functional obsolescence of the same medical imaging equipment, consequently creating a need for renewal. Older equipment has a high risk of failures and breakdowns, which might cause delays in diagnosis and treatment of the patient, and safety problems both for the patient and the medical staff. The European Society of Radiology is promoting the use of up-to-date equipment, especially in the context of the EuroSafe Imaging Campaign, as the use of up-to-date equipment will improve quality and safety in medical imaging. Every healthcare institution or authority should have a plan for medical imaging equipment upgrade or renewal. This plan should look forward a minimum of 5 years, with annual updates. Teaching points • Radiological equipment has a definite life cycle span, resulting in unavoidable breakdown and decrease or loss of image quality which renders equipment useless after a certain time period.• Equipment older than 10 years is no longer state-of-the art equipment and replacement is essential. Operating costs of older equipment will be high when compared with new equipment, and sometimes maintenance will be impossible if no spare parts are available.• Older equipment has a high risk of failure and breakdown, causing delays in diagnosis and treatment of the patient and safety problems both for the patient and the medical staff.• Every healthcare institution or authority should have a plan for medical imaging equipment upgrade or replacement. This plan should look forward a

  19. Radiological evaluation of chondroblastoma

    Energy Technology Data Exchange (ETDEWEB)

    Hudson, T.M.; Hawkins, I.F. Jr.

    1981-04-01

    Eleven new and six recurrent chondroblastomas were studied with multiple radiological imaging methods (plain radiography, conventional tomography, computed tomography, radionuclide bone scanning, and angiography). When the plain radiographic appearance was typical, conventional tomography or computed tomography (CT) was helpful, but other studies were not. Periosteal reaction and angiographic hypervascularity were common and did not indicate cortical breakthrough. For large, aggressive, or atypical lesions, conventional tomography and CT were helpful in delineating anatomic extent, and angiography was of value in demonstrating major vessel displacement. Radionuclide bone scanning was not useful.

  20. Radiological Calibration and Standards Facility

    Data.gov (United States)

    Federal Laboratory Consortium — PNNL maintains a state-of-the-art Radiological Calibration and Standards Laboratory on the Hanford Site at Richland, Washington. Laboratory staff provide expertise...

  1. Logical and historical determination of the Arrow and Sen impossibility theorems

    Directory of Open Access Journals (Sweden)

    Boričić Branislav

    2007-01-01

    Full Text Available General classification of mathematical statements divides them into universal, those of the form xA , and existential ЭxA ones. Common formulations of impossibility theorems of K. J. Arrow and A. K. Sen are represented by the statements of the form "there is no x such that A". Bearing in mind logical equivalence of formulae ¬ЭxA and x¬A, we come to the conclusion that the corpus of impossibility theorems, which appears in the theory of social choice, could make a specific and recognizable subclass of universal statements. In this paper, on the basis of the established logical and methodological criteria, we point to a sequence of extremely significant "impossibility theorems", reaching throughout the history of mathematics to the present days and the famous results of Arrow and Sen in field of mathematical economics. We close with specifying the context which makes it possible to formulate the results of Arrow and Sen accurately, presenting a new direct proof of Sen’s result, with no reliance on the notion of minimal liberalism. .

  2. Evidence for {Kappa}{sup +} {r_arrow} {pi}{sup +}{nu}{anti {nu}}

    Energy Technology Data Exchange (ETDEWEB)

    Kettell, S.

    1998-12-31

    The first observation of the decay {Kappa}{sup +} {r_arrow} {pi}{sup +}{nu}{anti {nu}} has been reported. The E787 experiment presented evidence for the {Kappa}{sup +} {r_arrow} {pi}{sup +}{nu}{anti {nu}} decay, based on the observation of a single clean event from data collected during the 1995 run of the AGS (Alternating Gradient Synchrotron at Brookhaven National Laboratory). The branching ratio indicated by this observation, {Beta}({Kappa}{sup +} {r_arrow} {pi}{sup +}{nu}{anti {nu}}) = 4.2{sub {minus}3.5}{sup +9.7} {times} 10{sup {minus}10}, is consistent with the Standard Model expectation although the central experimental value is four times larger. The final E787 data sample, from the 1995--98 runs, should reach a sensitivity of about five times that of the 1995 run alone. A new experiment, E949, has been given scientific approval and should start data collection in 2001. It is expected to achieve a sensitivity of more than an order of magnitude below the prediction of the Standard Model.

  3. Evidence for K{sup +} {r_arrow} {pi}{sup +} {nu}{anti {nu}}

    Energy Technology Data Exchange (ETDEWEB)

    Kettell, S.; E787 Collaboration; E949 Collaboration

    1998-12-31

    The decay K{sup +} {r_arrow} {pi}{sup +}{nu}{anti {nu}} has been observed for the first time. The E787 experiment has presented evidence for the K{sup +} {r_arrow} {pi}{sup +}{nu}{anti {nu}} decay, based on the observation of a single clean event from data collected during the 1995 run of the AGS (Alternating Gradient Synchrotron at Brookhaven National Laboratory). The branching ratio indicated by this observation, B(K{sup +} {r_arrow} {pi}{sup +}{nu}{anti {nu}}) = 4.2{sub {minus}3.5}{sup +9.7} {times} 10{sup {minus}10}, is consistent with the Standard Model expectation although the central experimental value is four times larger. The final E787 data sample, from the 1995--99 runs, should reach a sensitivity of about eight times that of the 1995 run alone. A new experiment, E949, has been approved to run, starting in the year 2000, and is expected to achieve a sensitivity of more than an order of magnitude below the prediction of the Standard Model.

  4. Quantum restoration of broken symmetry in onedimensional loop space

    Indian Academy of Sciences (India)

    Pinaki Patra; Tanmay Mandal; Jyoti Prasad Saha

    2014-06-01

    For one-dimensional loop space, a nonlinear nonlocal transformation of fields is given to make the action of the self-interacting quantum field to the free one. A specific type of classically broken symmetry is restored in quantum theory. One-dimensional sine-Gordon system and sech interactions are treated as the explicit examples.

  5. Bags in relativistic quantum field theory with spontaneously broken symmetry

    Energy Technology Data Exchange (ETDEWEB)

    Wadati, M.; Matsumoto, H.; Umezawa, H.

    1978-08-15

    Presented is a microscopic derivation of bags from a relativistic quantum theory with spontaneously broken symmetry. The static energy of a bag whose singularity is the surface of a sphere coincides with the volume tension in the MIT bag theory. A similarity between the bags and the point defects in crystals is pointed out.

  6. Dynamically broken Anti-de Sitter action for gravity

    CERN Document Server

    Tresguerres, Romualdo

    2008-01-01

    Due to a suitable Higgs mechanism, a standard Anti-de Sitter gauge theory becomes spontaneously broken. The resulting Lorentz invariant gravitational action includes the Hilbert-Einstein term of ordinary Einstein-Cartan gravity with cosmological constant, plus contributions quadratic in curvature and torsion, and a scalar Higgs sector.

  7. Radiology illustrated. Spine

    Energy Technology Data Exchange (ETDEWEB)

    Kang, Heung Sik; Lee, Joon Woo [Seoul National Univ. Bundang Hospital, Seongnam, Kyonggi-do (Korea, Republic of). Dept. of Radiology; Kwon, Jong Won [Samsung Medical Center, Seoul (Korea, Republic of). Dept. of Radiology

    2014-04-01

    Offers a practical approach to image interpretation for spinal disorders. Includes numerous high-quality radiographic images and schematic illustrations. Will serve as a self-learning book covering daily routine cases from the basic to the advanced. Radiology Illustrated: Spine is an up-to-date, superbly illustrated reference in the style of a teaching file that has been designed specifically to be of value in clinical practice. Common, critical, and rare but distinctive spinal disorders are described succinctly with the aid of images highlighting important features and informative schematic illustrations. The first part of the book, on common spinal disorders, is for radiology residents and other clinicians who are embarking on the interpretation of spinal images. A range of key disorders are then presented, including infectious spondylitis, cervical trauma, spinal cord disorders, spinal tumors, congenital disorders, uncommon degenerative disorders, inflammatory arthritides, and vascular malformations. The third part is devoted to rare but clinically significant spinal disorders with characteristic imaging features, and the book closes by presenting practical tips that will assist in the interpretation of confusing cases.

  8. Radiological changes of adult sprue

    Energy Technology Data Exchange (ETDEWEB)

    Neutard, E.; Kluge, F.

    1981-08-01

    Radiological findings of 10 adult patients with sprue were compared with histology. Patients suffering from subtotal villous atrophy were showing distinct radiological changes. The most important finding of sprue is the dilatation of the small intestine. Further typical changes are segmentations and fragmentations as well as mucous hypertrophy and the sign of moulage. In a 57-year-old female patient who was suffering from sprue for 35 years, a carcinoma of the small bowl was found and was resected during laparatomy. Sprue is a premalignant disease; therefore radiological investigations are of special importance. Therapy by a diet without gluten can reduce the radiological changes to normal very bad changes rarely can be reduced totally. Radiological changes are not significant, but the diagnosis can be made in most cases by investigation with barium.

  9. Radiological Work Planning and Procedures

    CERN Document Server

    Kurtz, J E

    2000-01-01

    Each facility is tasked with maintaining personnel radiation exposure as low as reasonably achievable (ALARA). A continued effort is required to meet this goal by developing and implementing improvements to technical work documents (TWDs) and work performance. A review of selected TWDs from most facilities shows there is a need to incorporate more radiological control requirements into the TWD. The Radioactive Work Permit (RWP) provides a mechanism to place some of the requirements but does not provide all the information needed by the worker as he/she is accomplishing the steps of the TWD. Requiring the engineers, planners and procedure writers to put the radiological control requirements in the work steps would be very easy if all personnel had a strong background in radiological work planning and radiological controls. Unfortunately, many of these personnel do not have the background necessary to include these requirements without assistance by the Radiological Control organization at each facility. In add...

  10. Radiology today. Volume 4

    Energy Technology Data Exchange (ETDEWEB)

    Heuck, F.H.W.; Donner, M.W.

    1987-01-01

    The book discusses the following contents: Advances in Cardiovascular Imaging: Digital Arteriography: Ongoing Developments. Magnetic Resonance Imaging of the Cardiovascular System. Comparison of Vascular CT and MRI. Characterization of Vascular Lesions by Ultrasound - Progress in Vascular Interventions: Laser Angioplasty: A Review. Fibrinolytic Therapy Combined with Clot Extraction. Drugs Useful in Angioplasty. Developments in Cardiovascular Imaging: Blood Flow Measurements with Digital Arteriography. Selection of Imaging Techniques for Venous Thromboembolic Disease. Clinical Usefulness of High-Verus Low-Osmolality Contrast Agents. Developments in Angiographic and Interventional Instrumentation. Progress in Cardiovascular Interventions. Inferior Vena Cava Filters: Types, Placement, and Efficiency. Transluminal Vascular Stenting and Grafting. Venography and Sclerotherapy of Varioceles in Children and Adolescents. A New Catheter System - Important Hip Problems: Radiologic and Pathologic Correlation and Hip Disease. Comparison of Imaging Modalities in Femoral Head Necrosis. Osteoartrosis and Arthritis (Synovitis) of the Hip. Hip Anthrography.

  11. Radiologic findings in neurofibromatosis

    Energy Technology Data Exchange (ETDEWEB)

    Kim, Dai Young; Jeon, Seok Chol; Lee, Kwan Se; Yeon, Kyung Mo; Choo, Dong Woon [Seoul National University College of Medicine, Seoul (Korea, Republic of)

    1979-12-15

    Neurofibromatosis is an uncommon but certainly not a rare hereditary disorder, probably of neuralcrest origin, involving not only neuroectoderm and mesoderm but also endoderm and characterized by cafe au lait spots and cutaneous and subcutaneous tumors, with secondary mesodermal defects responsible for protean osseous abnormalities and various manifestations in other systems. This paper is a study of confirmed 143 cases of neurofibromatosis collected for past 8 years. In this analysis, special attention was given to the selected 37 cases which showed abnormal findings on radiological examinations. Overall male to female ratio was 1 : 1.3. The most frequent kind of abnormalities was vertebral kyphoscoliosis in 12 cases. Among the more pathognomonic but uncommon abnormalities to neurofibromatosis, we experienced each 2 cases of lambdoid defect, pseudoarthrosis and renovascular hypertension, and 1 cases of sphenoid bone absence.

  12. Radiology illustrated. Gastrointestinal tract

    Energy Technology Data Exchange (ETDEWEB)

    Choi, Byung Ihn (ed.) [Seoul National University Hospital (Korea, Republic of). Dept. of Radiology

    2015-02-01

    Radiology Illustrated: Gastrointestinal Tract is the second of two volumes designed to provide clear and practical guidance on the diagnostic imaging of abdominal diseases. The book presents approximately 300 cases with 1500 carefully selected and categorized illustrations of gastrointestinal tract diseases, along with key text messages and tables that will help the reader easily to recall the relevant images as an aid to differential diagnosis., Essential points are summarized at the end of each text message to facilitate rapid review and learning. Additionally, brief descriptions of each clinical problem are provided, followed by case studies of both common and uncommon pathologies that illustrate the roles of the different imaging modalities, including ultrasound, radiography, computed tomography, and magnetic resonance imaging.

  13. Form factors of the transitions {gamma}{sup *}{pi}{sup 0} {r_arrow} {gamma} and {gamma}{sup *}{eta}{r_arrow}{gamma}

    Energy Technology Data Exchange (ETDEWEB)

    Afanasev, A. [Continuous Electron Beam Accelerator Facility, Newport News, VA (United States)

    1994-04-01

    The author discusses possibilities to study {gamma}*{pi}{sup 0} and {gamma}*{eta} {r_arrow} {gamma} transition form factors at CEBAF energies. The author shows that for 4 GeV electron beam, these form factors can be measured at CEBAF for the 4-momentum transfers Q{sup 2} {le} 2.5 (GeV/c){sup 2} using virtual Compton scattering on the proton and nuclear target in the kinematic regime of low momentum transfers to the target. These measurements can be extended to Q{sup 2} {le} 4.0 (GeV/c){sup 2} using the electron beam with the energy 6 GeV.

  14. Optimal Radiologic Report

    Directory of Open Access Journals (Sweden)

    Esmaeel Shokrollahi

    2010-05-01

    Full Text Available The radiological report is the medical document that qualifies the radiologist as a clinician and as a specialist, because through it radiologists expresse their professionalism."nThere is nothing more debatable than the report and how it should be written. It is conditioned by many variables that derive from the wide variety of sensitivities and personal or local cultures. In addition, there has never been a specific school in which these rules are taught."nIn the assessment of each written material, two things are explained:"n1. Methodology of the writing process itself as an act"n2. Characters of the written material "nIn assessing the method of writing a radiological report, two dimensions are discussed: "n1. Hardware: including data gathering, their processing and preparing them to be seen, the me-thod of reporting, conditions of workspace, instru-ments and all the physical parts of the work."n2. Software: how someone watches the images, me-thodology of thought and logical reasoning, and ultimately, how pictures are transferred to understandable, meaningful and useful written material."nIn assessing the characters of the written material itself, we should note:"n1. The configuration includes the structure of the words and grammar, style of writing, order of things to come after each other. This is the carrier of the content. "n2. The content is the main reason of the writing which contains the whole meaning and all parts of what one wants his or her audience to get from the note.

  15. Corneoscleral abscess resulting from a broken suture after cataract surgery.

    Science.gov (United States)

    Cameron, J A; Huaman, A

    1994-01-01

    An 82-year-old man had pain and decreased vision in his right eye 15 months after uncomplicated cataract surgery. Examination revealed a large corneoscleral abscess with a 2 mm x 1 mm area of fluorescein staining at the base of a broken protruding 10-0 nylon suture. Streptococcus pneumoniae was isolated from both the suture and base of the ulcer. Despite intensive topical, subconjunctival, and systemic antibiotics, a large corneal perforation developed, necessitating a 10 mm tectonic penetrating keratoplasty. Long-term follow-up of patients after cataract surgery is important and should include an inspection of the limbal wound and removal of loose or broken exposed sutures. Suture-related complications will be eliminated if clinical studies prove the safety and efficacy of sutureless cataract surgery.

  16. Consistency condition for inflation from (broken) conformal symmetry

    Energy Technology Data Exchange (ETDEWEB)

    Schalm, Koenraad; Aalst, Ted van der [Instituut-Lorentz for Theoretical Physics, Universiteit Leiden, Niels Bohrweg 2, Leiden (Netherlands); Shiu, Gary, E-mail: kschalm@lorentz.leidenuniv.nl, E-mail: shiu@physics.wisc.edu, E-mail: vdaalst@lorentz.leidenuniv.nl [Department of Physics, University of Wisconsin-Madison, Madison, WI 53706 (United States)

    2013-03-01

    We investigate the symmetry constraints on the bispectrum, i.e. the three-point correlation function of primordial density fluctuations, in slow-roll inflation. It follows from the defining property of slow-roll inflation that primordial correlation functions inherit most of their structure from weakly broken de Sitter symmetries. Using holographic techniques borrowed from the AdS/CFT correspondence, the symmetry constraints on the bispectrum can be mapped to a set of stress-tensor Ward identities in a weakly broken 2+1-dimensional Euclidean CFT. We construct the consistency condition from these Ward identities using conformal perturbation theory. This requires a second order Ward identity and the use of the evolution equation. Our result also illustrates a subtle difference between conformal perturbation theory and the slow-roll expansion.

  17. Adiabatic approximation for the Rabi model with broken inversion symmetry

    Science.gov (United States)

    Shen, Li-Tuo; Yang, Zhen-Biao; Wu, Huai-Zhi

    2017-01-01

    We study the properties and behavior of the Rabi model with broken inversion symmetry. Using an adiabatic approximation approach, we explore the high-frequency qubit and oscillator regimes, and obtain analytical solutions for the qubit-oscillator system. We demonstrate that, due to broken inversion symmetry, the positions of two potentials and zero-point energies in the oscillators become asymmetric and have a quadratic dependence on the mean dipole moments within the high-frequency oscillator regime. Furthermore, we find that there is a critical point above which the qubit-oscillator system becomes unstable, and the position of this critical point has a quadratic dependence on the mean dipole moments within the high-frequency qubit regime. Finally, we verify this critical point based on the method of semiclassical approximation.

  18. Afterglow Light Curves and Broken Power Laws: A Statistical Study

    CERN Document Server

    J'ohannesson, G; Gudmundsson, E H; J\\'ohannesson, Gudlaugur; Bj\\"ornsson, Gunnlaugur; Gudmundsson, Einar H.

    2006-01-01

    In gamma-ray burst research it is quite common to fit the afterglow light curves with a broken power law to interpret the data. We apply this method to a computer simulated population of afterglows and find systematic differences between the known model parameters of the population and the ones derived from the power law fits. In general, the slope of the electron energy distribution is overestimated from the pre-break light curve slope while being underestimated from the post-break slope. We also find that the jet opening angle derived from the fits is overestimated in narrow jets and underestimated in wider ones. Results from fitting afterglow light curves with broken power laws must therefore be interpreted with caution since the uncertainties in the derived parameters might be larger than estimated from the fit. This may have implications for Hubble diagrams constructed using gamma-ray burst data.

  19. Anomalous dimensions in CFT with weakly broken higher spin symmetry

    Science.gov (United States)

    Giombi, Simone; Kirilin, Vladimir

    2016-11-01

    In a conformal field theory with weakly broken higher spin symmetry, the leading order anomalous dimensions of the broken currents can be efficiently determined from the structure of the classical non-conservation equations. We apply this method to the explicit example of O( N) invariant scalar field theories in various dimensions, including the large N critical O( N) model in general d, the Wilson-Fisher fixed point in d = 4 - ɛ, cubic scalar models in d = 6 - ɛ and the nonlinear sigma model in d = 2 + ɛ. Using information from the d = 4 - ɛ and d = 2 + ɛ expansions, we obtain some estimates for the dimensions of the higher spin operators in the critical 3d O( N) models for a few low values of N and spin.

  20. Risk management in radiology departments

    Science.gov (United States)

    Craciun, Horea; Mankad, Kshitij; Lynch, Jeremy

    2015-01-01

    Medical imaging and interventional radiology sustained prompt changes in the last few years, mainly as a result of technology breakthroughs, rise in workload, deficit in workforce and globalization. Risk is considered to be the chance or possibility of incurring loss or of a negative event happening that may cause injury to patients or medical practitioners. There are various causes of risks leading to harm and injury in radiology departments, and it is one of the objectives of this paper to scrutinize some of the causes. This will drive to consideration of some of the approaches that are used in managing risks in radiology. This paper aims at investigating risk management in radiology, and this will be achieved through a thorough assessment of the risk control measures that are used in the radiology department. It has been observed that the major focus of risk management in such medical setting is to reduce and eliminate harm and injury to patients through integration of various medical precautions. The field of Radiology is rapidly evolving due to technology advances and the globalization of healthcare. This ongoing development will have a great impact on the level of quality of care and service delivery. Thus, risk management in radiology is essential in protecting the patients, radiologists, and the medical organization in terms of capital and widening of the reputation of the medical organization with the patients. PMID:26120383

  1. Risk management in radiology departments

    Institute of Scientific and Technical Information of China (English)

    Horea; Craciun; Kshitij; Mankad; Jeremy; Lynch

    2015-01-01

    Medical imaging and interventional radiology sustained prompt changes in the last few years, mainly as aresult of technology breakthroughs, rise in workload, deficit in workforce and globalization. Risk is considered to be the chance or possibility of incurring loss or of a negative event happening that may cause injury to patients or medical practitioners. There are various causes of risks leading to harm and injury in radiology departments, and it is one of the objectives of this paper to scrutinize some of the causes. This will drive to consideration of some of the approaches that are used in managing risks in radiology. This paper aims at investigating risk management in radiology, and this will be achieved through a thorough assessment of the risk control measures that are used in the radiology department. It has been observed that the major focus of risk management in such medical setting is to reduce and eliminate harm and injury to patients through integration of various medical precautions. The field of Radiology is rapidly evolving due to technology advances and the globalization of healthcare. This ongoing development will have a great impact on the level of quality of care and service delivery. Thus, risk management in radiology is essential in protecting the patients, radiologists, and the medical organization in terms of capital and widening of the reputation of the medical organization with the patients.

  2. Mass Formulae for Broken Supersymmetry in Curved Space-Time

    CERN Document Server

    Ferrara, Sergio

    2016-01-01

    We derive the mass formulae for ${\\cal N}=1$, $D=4$ matter-coupled Supergravity for broken (and unbroken) Supersymmetry in curved space-time. These formulae are applicable to de Sitter configurations as is the case for inflation. For unbroken Supersymmetry in anti-de Sitter (AdS) one gets the mass relations modified by the AdS curvature. We compute the mass relations both for the potential and its derivative non-vanishing.

  3. Baryon currents in the C-broken phase of QCD

    CERN Document Server

    Lucini, B; Pica, C

    2007-01-01

    In a space with some sufficiently small compact dimension (with non-trivial cycles) and with periodic boundary conditions for the fermions, the charge conjugation (C), spatial parity (P), time reversal (T) and CPT symmetries are spontaneously broken in QCD. We have investigated what are the physical consequences of the breaking of these discrete symmetries, that is what local observables can be used to detect it. We show that the breaking induces the generation of baryon currents, propagating along the compact dimensions.

  4. Radiological aspects of rheumatoid arthritis

    Energy Technology Data Exchange (ETDEWEB)

    Schacherl, M.

    1985-09-23

    An introductory summary of the imaging-diagnosis will be given. The necessity of acquiring a catalogue of application to particular imaging methods is emphasized. Discussion of step by step diagnosis regarding rheumatologic questions is given on example of the hand. Technically insufficient radiographs and bad habits during diagnostic analysis are pointed out. Radiologic problems in differentiating arthritis/osteoarthrosis will be mentioned. The discussion of these points is followed by outlining the radiology of rheumatoid arthritis and the complexity of this disease. Introduction of a new stage classification. Finally twelve basic radiologic types of rheumatoid arthritis will be presented.

  5. Ichthyosporidium weissii n. sp. (Microsporidia) infecting the arrow goby (Clevelandia ios).

    Science.gov (United States)

    Sanders, Justin; Myers, Mark S; Tomanek, Lars; Cali, Ann; Takvorian, Peter M; Kent, Michael L

    2012-01-01

    Gonadal infections by a novel microsporidium were discovered in 34% (13/38) of arrow gobies, Clevelandia ios, sampled over a 3-yr period from Morro Bay Marina in Morro Bay, California. Gonadal tumors had been reported in arrow gobies from this geographic area. The infected gonads, found primarily in females, typically appeared grossly as large, white-gray firm and lobulated masses. Histological examination revealed large, multilobate xenomas within the ovaries and no evidence of neoplasia. Typical of the genus Ichthyosporidium, the large xenomas were filled with developmental stages and pleomorphic spores. Wet mount preparations showed two general spore types: microspores with mean length of 6.2 (7.0-4.9, SD = 0.6, N = 20) μm and mean width of 4.3 (5.3-2.9, SD = 0.8) μm; and less numerous macrospores with mean length of 8.5 (10.1-7.1, SD = 1.0, N = 10) μm and mean width of 5.5 (6.2-4.8, SD = 0.5) μm. Transmission electron microscopy demonstrated stages consistent with the genus and 35-50 turns of the polar filament. Small subunit rDNA gene sequence analysis revealed that the parasite from arrow gobies was most closely related to, but distinct from Ichthyosporidium sp. based on sequences available in GenBank. We conclude that this microsporidium represents a new species of Ichthyosporidium, the first species of this genus described from a member of the family Gobiidae and from the Pacific Ocean.

  6. Ultrasound Won't Help Broken Bones Heal, Expert Panel Says

    Science.gov (United States)

    ... fullstory_163763.html Ultrasound Won't Help Broken Bones Heal, Expert Panel Says Detailed review suggests it's ... LIPUS) -- to help speed the healing of broken bones. But an international panel of experts now says ...

  7. [Upsilon](1[ital S])[r arrow][gamma]+noninteracting particles

    Energy Technology Data Exchange (ETDEWEB)

    Balest, R.; Cho, K.; Ford, T.; Johnson, D.R.; Lingel, K.; Lohner, M.; Rankin, P.; Smith, J.G.; Alexander, J.P.; Bebek, C.; Berkelman, K.; Bloom, K.; Browder, T.E.; Cassel, D.G.; Cho, H.A.; Coffman, D.M.; Crowcroft, D.S.; Drell, P.S.; Dumas, D.; Ehrlich, R.; Gaidarev, P.; Galik, R.S.; Garcia-Sciveres, M.; Geiser, B.; Gittelman, B.; Gray, S.W.; Hartill, D.L.; Heltsley, B.K.; Henderson, S.; Jones, C.D.; Jones, S.L.; Kandaswamy, J.; Katayama, N.; Kim, P.C.; Kreinick, D.L.; Ludwig, G.S.; Masui, J.; Mevissen, J.; Mistry, N.B.; Ng, C.R.; Nordberg, E.; Patterson, J.R.; Peterson, D.; Riley, D.; Salman, S.; Sapper, M.; Wuerthwein, F.; Urish, M.M.; Avery, P.; Freyberger, A.; Rodriguez, J.; Yang, S.; Yelton, J.; Cinabro, D.; Liu, T.; Saulnier, M.; Wilson, R.; Yamamoto, H.; Bergfeld, T.; Eisenstein, B.I.; Gollin, G.; Ong, B.; Palmer, M.; Selen, M.; Thaler, J.J.; Edwards, K.W.; Ogg, M.; Bellerive, A.; Britton, D.I.; Hyatt, E.R.F.; MacFarlane, D.B.; Patel, P.M.; Spaan, B.; Sadoff, A.J.; Ammar, R.; Ba; (CLEO Collaboration)

    1995-03-01

    We consider the decay of [Upsilon](1[ital S]) particles produced at CESR into a photon which is observed by the CLEO detector plus particles which are not seen. These could be real particles which fall outside of our acceptance, or particles which are noninteracting. We report the results of our search fo the process [Upsilon](1[ital S])[r arrow][gamma]+ unseen'' for photon energies [gt]1 GeV, obtaining limits for the case where unseen'' is either a single particle or a particle-antiparticle pair. Our upper limits represent the highest sensitivity measurements for such decays to date.

  8. Some experimental and theoretical flutter characteristics of an arrow-wing configuration

    Science.gov (United States)

    Doggett, R. V., Jr.; Ricketts, R. H.

    1977-01-01

    Experimental and theoretical flutter results are presented for a simplified 1/50-size wind-tunnel model of an arrow-wing configuration. Transonic flutter characteristics are presented for three configurations - wing without engine nacelles, wing with flow-through nacelles, and wing with pencil nacelles (thin, streamline bodies). Experimental results are correlated with analytical results obtained from kernel-function and doublet-lattice unsteady aerodynamic theories. Theoretical results are presented that show the effects on flutter of systematic changes in structural stiffness and mass.

  9. Registro de Cyclocephala flavipennis Arrow, 1914 (Coleoptera: Melolonthidae danificando plantas de mirtileiro no Brasil

    Directory of Open Access Journals (Sweden)

    Gabriela Inés Diez-Rodríguez

    2015-02-01

    Full Text Available Larvas de Cyclocephala flavipennis Arrow, 1914, são comumente encontradas em cereais de inverno (trigo, cevada, aveia e triticale, milho e soja, no Rio Grande do Sul. Em março de 2012, larvas desta espécie foram detectadas em plantas de mirtileiro (Vaccinium ashei Reade, cultivar 'O´Neal', no município de Pelotas, RS. Os insetos alimentaram-se de raízes em áreas restritas do pomar. Este é o primeiro relato da ocorrência do coró-pequeno, C. flavipennis, em plantas de mirtileiro

  10. Arrow y sen: el rescate del individuo y de las instituciones

    OpenAIRE

    Cante, Freddy

    2010-01-01

    La teoría de la elección social que propone Arrow y Sen es una ruptura con los desarrollos hegemónicos de la microeconomía y de la macroeconomía en dos sentidos: rescata la diversidad de gustos y valores de cada individuo en oposición a los conceptos agregados; además, muestra que la conducta racional es quizás lo menos importante con lo que abre un diálogo con la economía institucional.

  11. Cardiac radiology: centenary review.

    Science.gov (United States)

    de Roos, Albert; Higgins, Charles B

    2014-11-01

    During the past century, cardiac imaging technologies have revolutionized the diagnosis and treatment of acquired and congenital heart disease. Many important contributions to the field of cardiac imaging were initially reported in Radiology. The field developed from the early stages of cardiac imaging, including the use of coronary x-ray angiography and roentgen kymography, to nowadays the widely used echocardiographic, nuclear medicine, cardiac computed tomographic (CT), and magnetic resonance (MR) applications. It is surprising how many of these techniques were not recognized for their potential during their early inception. Some techniques were described in the literature but required many years to enter the clinical arena and presently continue to expand in terms of clinical application. The application of various CT and MR contrast agents for the diagnosis of myocardial ischemia is a case in point, as the utility of contrast agents continues to expand the noninvasive characterization of myocardium. The history of cardiac imaging has included a continuous process of advances in our understanding of the anatomy and physiology of the cardiovascular system, along with advances in imaging technology that continue to the present day.

  12. The Radiological Research Accelerator Facility

    Energy Technology Data Exchange (ETDEWEB)

    Hall, E.J.

    1992-05-01

    The Radiological Research Accelerator Facility (RARAF) is based on a 4-MV Van de Graaff accelerator, which is used to generate a variety of well-characterized radiation beams for research in radiobiology, radiological physics, and radiation chemistry. It is part of the Center for Radiological Research (CRR) -- formerly the Radiological Research Laboratory (RRL) -- of Columbia University, and its operation is supported as a National Facility by the US Department of Energy (DOE). As such, RARAF is available to all potential users on an equal basis, and scientists outside the CRR are encouraged to submit proposals for experiments at RARAF. The operation of the Van de Graaff is supported by the DOE, but the research projects themselves must be supported separately. Experiments performed from May 1991--April 1992 are described.

  13. The Radiological Research Accelerator Facility

    Energy Technology Data Exchange (ETDEWEB)

    Hall, E.J.; Marino, S.A.

    1993-05-01

    The Radiological Research Accelerator Facility (RARAF) is based on a 4-MV Van de Graaff accelerator, which is used to generate a variety of well-characterized radiation beams for research in radiobiology, radiological physics, and radiation chemistry. It is part of the Center for Radiological Research (CRR) - formerly the Radiological Research Laboratory of Columbia University, and its operation is supported as a National Facility by the US Department of Energy (DOE). As such, RARAF is available to all potential users on an equal basis and scientists outside the CRR are encouraged to submit proposals for experiments at RARAF. The operation of the Van de Graaff is supported by the DOE, but the research projects themselves must be supported separately. This report provides a listing and brief description of experiments performed at RARAF during the May 1, 1992 through April 30, 1993.

  14. Radiological Assistance Program (RAP) Regions

    Data.gov (United States)

    Department of Homeland Security — The U.S. Department of Energy (DOE) created the Radiological Assistance Program (RAP) in the 1950s to make DOE resources and expertise available to organizations...

  15. National Radiological Fixed Lab Data

    Data.gov (United States)

    U.S. Environmental Protection Agency — The National Radiological Fixed Laboratory Data Asset includes data produced in support of various clients such as other EPA offices, EPA Regional programs, DOE,...

  16. Development of Mobile Radiological Monitor

    Institute of Scientific and Technical Information of China (English)

    2008-01-01

    <正>Mobile radiological monitor is used to detect gamma rays and neutron for personal and vehicle. It can be installed on a microbus as a mobile monitoring system. One large plastic scintillation detector is

  17. Peer review in cardiothoracic radiology.

    Science.gov (United States)

    Kanne, Jeffrey P

    2014-09-01

    A variety of peer review methods can be used as part of quality assurance and quality improvement in cardiothoracic radiology. Traditionally, peer review in radiology is a retrospective process relying primarily on review of previously interpreted studies at the time of follow-up or additional imaging. However, peer review can be enhanced with other methods such as double reads, focused practice review, practice audit, and correlation with operative and pathologic findings. Furthermore, feedback from referring physicians can be extremely useful in improving the quality of a radiology practice. This article discusses peer review in radiology with a focus on cardiothoracic imaging. Types of peer review, advantages and shortcomings, and future challenges are addressed.

  18. First measurement of the rate for the inclusive radiative penguin decay {ital b}{r_arrow}{ital s}{gamma}

    Energy Technology Data Exchange (ETDEWEB)

    Alam, M.S.; Kim, I.J.; Ling, Z.; Mahmood, A.H.; O`Neill, J.J.; Severini, H.; Sun, C.R.; Wappler, F.; Crawford, G.; Daubenmier, C.M.; Fulton, R.; Fujino, D.; Gan, K.K.; Honscheid, K.; Kagan, H.; Kass, R.; Lee, J.; Sung, M.; White, C.; Wolf, A.; Zoeller, M.M.; Butler, F.; Fu, X.; Nemati, B.; Ross, W.R.; Skubic, P.; Wood, M.; Bishai, M.; Fast, J.; Gerndt, E.; Hinson, J.W.; McIlwain, R.L.; Miao, T.; Miller, D.H.; Modesitt, M.; Payne, D.; Shibata, E.I.; Shipsey, I.P.J.; Wang, P.N.; Battle, M.; Ernst, J.; Gibbons, L.; Kwon, Y.; Roberts, S.; Thorndike, E.H.; Wang, C.H.; Coan, T.; Dominick, J.; Fadeyev, V.; Korolkov, I.; Lambrecht, M.; Sanghera, S.; Shelkov, V.; Skwarnicki, T.; Stroynowski, R.; Volobouev, I.; Wei, G.; Artuso, M.; Gao, M.; Goldberg, M.; He, D.; Horwitz, N.; Moneti, G.C.; Mountain, R.; Muheim, F.; Mukhin, Y.; Playfer, S.; Rozen, Y.; Stone, S.; Xing, X.; Zhu, G.; Bartelt, J.; Csorna, S.E.; Egyed, Z.; Jain, V.; Gibaut, D.; Kinoshita, K.; Pomianowski, P.; Barish, B.; Chadha, M.; Chan, S.; Cowen, D.F.; Eigen, G.; Miller, J.S.; O`Grady, C.; Urheim, J.; Weinstein, A.J.; Athanas, M.; Brower, W.; Masek, G.; Paar, H.P.; Gronberg, J.; Korte, C.M.; Kutschke, R.; Menary, S.; Morrison, R.J.; Nakanishi, S.; Nelson, H.N.; Nelson, T.K.; Qiao, C.; Richman, J.D.; Ryd, A.; Sperka, D.; Tajima, H.; Witherell, M.S.; Balest, R.; Cho, K.; Ford, W.T.; Johnson, D.R.; Lingel, K.; Lohner, M.; Rankin, P.; Smith, J.G.; Alexander, J.P.; Bebek, C.; Berkelman, K.; Bloom, K.; Browder, T.E.; Cassel, D.G.; Cho, H.A.; Coffman, D.M.; Crowcroft, D.S.; Drell, P.S.; Dumas, D.J.; Ehrlich, R.; Gaidarev, P.; Garcia-Sciveres, M.; Geiser, B.; Gittelman, B.; Gray, S.W.; Hartill, D.L.; Heltsley, B.K.; Henderson, S.; Jones, C.D.; Jones, S.L.; Kandaswamy, J.; Katayama, N.; Kim, P.C.; Kreinick, D.L.; Ludwig, G.S.; Masui, J.; Mevissen, J.; Mistry, N.B.; Ng, C.R.; Nordberg, E.; Patterson, J.R.; Peterson, D.; Riley, D.; Salman, S.; Sapper, M.; Wuerthwein, F.; Avery, P.; Freyberger, A.; Rodriguez, J.; (CLEO Co...

    1995-04-10

    We have measured the inclusive {ital b}{r_arrow}{ital s}{gamma} branching ratio to be (2.32{plus_minus}0.57{plus_minus}0.35){times}10{sup {minus}4}, where the first error is statistical and the second is systematic. Upper and lower limits on the branching ratio, each at 95% C.L., are {ital B}({ital b}{r_arrow}{ital s}{gamma}){lt}4.2{times}10{sup {minus}4} and {ital B}({ital b}{r_arrow}{ital s}{gamma}){gt}1.0{times}10{sup {minus}4}. These limits restrict the parameters of extensions of the standard model.

  19. Medieval Tract «Arab Archery» About the Parameters of Bows and Arrows as A Historical Source

    Directory of Open Access Journals (Sweden)

    Aleksei V. Korobeinikov

    2015-06-01

    Full Text Available The article deals with the excerpts from the tract «Arab Archery» dedicated to the parameters of the arab bows and arrows. The attention is paid to the system of archers`gestures, ballistic parameters. The work has comments. The author came to the conclusion that among the archers, in all probability, there was a specialization: skillful direction (snipers by the light arrows at high speed and a high degree of sharpening lethal hit the particularly important individual goals – armored commanders, signalers, communications, monitors, and so on. While the bulk of shooters cloud of arrows showered group goals: bezdospeshnuyu (or "lightly armored" infantry, and not caring about the accuracy of each of his shots.

  20. Financial accounting for radiology executives.

    Science.gov (United States)

    Seidmann, Abraham; Mehta, Tushar

    2005-03-01

    The authors review the role of financial accounting information from the perspective of a radiology executive. They begin by introducing the role of pro forma statements. They discuss the fundamental concepts of accounting, including the matching principle and accrual accounting. The authors then explore the use of financial accounting information in making investment decisions in diagnostic medical imaging. The paper focuses on critically evaluating the benefits and limitations of financial accounting for decision making in a radiology practice.

  1. Radiological training for tritium facilities

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1996-12-01

    This program management guide describes a recommended implementation standard for core training as outlined in the DOE Radiological Control Manual (RCM). The standard is to assist those individuals, both within DOE and Managing and Operating contractors, identified as having responsibility for implementing the core training recommended by the RCM. This training may also be given to radiological workers using tritium to assist in meeting their job specific training requirements of 10 CFR 835.

  2. Radiological appearances of sinonasal abnormalities

    Energy Technology Data Exchange (ETDEWEB)

    El-Beltagi, A.H.; Sobeih, A.A.; Valvoda, M.; Dahniya, M.H.; Badr, S.S

    2002-08-01

    The aim of this pictorial review is to present a variety of abnormalities of the sinonasal cavities to emphasize the diversity of lesions occurring in this region. These include congenital, neoplastic and granulomatous disorders and some allergic and inflammatory lesions with uncommon radiological appearances, as well as expanding lesions of the facial bones or of dental origin with secondary involvement of the related sinus(es). El-Beltagi, A.H. et al. (2002). Clinical Radiology 57, 702-718.

  3. FDH radiological design review guidelines

    Energy Technology Data Exchange (ETDEWEB)

    Millsap, W.J.

    1998-09-29

    These guidelines discuss in more detail the radiological design review process used by the Project Hanford Management Contractors as described in HNF-PRO-1622, Radiological Design Review Process. They are intended to supplement the procedure by providing background information on the design review process and providing a ready source of information to design reviewers. The guidelines are not intended to contain all the information in the procedure, but at points, in order to maintain continuity, they contain some of the same information.

  4. Radiological Control Manual. Revision 0, January 1993

    Energy Technology Data Exchange (ETDEWEB)

    1993-04-01

    This manual has been prepared by Lawrence Berkeley Laboratory to provide guidance for site-specific additions, supplements, and clarifications to the DOE Radiological Control Manual. The guidance provided in this manual is based on the requirements given in Title 10 Code of Federal Regulations Part 835, Radiation Protection for Occupational Workers, DOE Order 5480.11, Radiation Protection for Occupational Workers, and the DOE Radiological Control Manual. The topics covered are (1) excellence in radiological control, (2) radiological standards, (3) conduct of radiological work, (4) radioactive materials, (5) radiological health support operations, (6) training and qualification, and (7) radiological records.

  5. Social Conflicts in Arrow Of God: Lessons in Flexibility and Good Governance

    Directory of Open Access Journals (Sweden)

    Anaso George Nworah

    2016-01-01

    Full Text Available Chinua Achebe’s second novel, Arrow of God, is concerned with the theme of conflict. According to Holman C. Hugh (1960, there are four basic levels of conflict: struggle between the protagonist and the antagonist, the protagonist with the society, struggle in the mind of the protagonist or the protagonist struggling with fate, destiny or force of nature. Conflicts in Arrow of God delineate three of these struggles in a concentration of events leading to the destruction of the social order in the community (Umuaro. However, the conflicts are linked with colonialism which is at the root of the conflict. In this view, the novel is to some extent, a protest against colonialism and the suffering that it brought to the colonised people generally and the Igbo specifically. Arising from the above, this paper draws some implications from the actions of the protagonist to reveal the connection between a leader’s flexibility and good governance as reflected in the life of the old chief priest (Ezeulu. The novel made its debut in 1964, symbolically marking a year since Nigeria’s adoption of Republican Constitution. The connection between Umuaro’s institution of Ulu and its priest as source of law and order with Nigeria’s adoption of the republican constitution is made obvious in this study. Through this, the nexus between literature and reality is thus reinforced. Keywords: Colonialism, Conflict, Myth, Protest, Governance, Republicanism

  6. Resolving conflicting views: Gaze and arrow cues do not trigger rapid reflexive shifts of attention.

    Science.gov (United States)

    Green, Jessica J; Gamble, Marissa L; Woldorff, Marty G

    2013-01-01

    It has become widely accepted that the direction of another individual's eye gaze induces rapid, automatic, attentional orienting, due to it being such a vital cue as to where in our environment we should attend. This automatic orienting has also been associated with the directional-arrow cues used in studies of spatial attention. Here, we present evidence that the response-time cueing effects reported for spatially non-predictive gaze and arrow cues are not the result of rapid, automatic shifts of attention. For both cue types, response-time effects were observed only for long-duration cue and target stimuli that overlapped temporally, were largest when the cues were presented simultaneously with the response-relevant target, and were driven by a slowing of responses for invalidly cued targets rather than speeding for validly cued ones. These results argue against automatic attention-orienting accounts and support a novel spatial-incongruency explanation for a whole class of rapid behavioral cueing effects.

  7. Exposing the cuing task: the case of gaze and arrow cues.

    Science.gov (United States)

    Hayward, Dana A; Ristic, Jelena

    2015-05-01

    The prevailing theoretical accounts of social cognitive processes propose that attention is preferentially engaged by social information. However, empirical investigations report virtually indistinguishable attention effects for social (e.g., gaze) and nonsocial (e.g., arrow) stimuli when a cuing task is used. Here, we show that this discrepancy between theory and data reflects a difference in how the extraneous processes induced by the cuing task's parameters (i.e., tonic alertness and voluntary temporal preparation) modulate cue-specific attentional effects. Overall, we found that tonic alertness and voluntary temporal preparation interacted within the cuing task, resulting in underadditive magnitudes of spatial orienting and superadditive magnitudes of the foreperiod effect. However, those interactions differentially affected social and nonsocial attention. While typical rapid social orienting was resilient to changing task parameters, sustained social orienting was eliminated only when the contribution of both extraneous processes was reduced. In contrast, orienting elicited by nonsocial arrows grew in magnitude with the reduction of voluntary temporal preparation and was delayed by the joint reduction of tonic alertness and voluntary temporal preparation. Together, these data indicate that cue-specific attention effects are masked by task dynamics of the cuing paradigm and highlight a pivotal role of the cuing task parameters in both the measurement and the theoretical attribution of spatial attention effects.

  8. Language of Mechanisms: Exam Analysis Reveals Students' Strengths, Strategies, and Errors When Using the Electron-Pushing Formalism (Curved Arrows) in New Reactions

    Science.gov (United States)

    Flynn, Alison B.; Featherstone, Ryan B.

    2017-01-01

    This study investigated students' successes, strategies, and common errors in their answers to questions that involved the electron-pushing (curved arrow) formalism (EPF), part of organic chemistry's language. We analyzed students' answers to two question types on midterms and final exams: (1) draw the electron-pushing arrows of a reaction step,…

  9. DOE standard: Radiological control

    Energy Technology Data Exchange (ETDEWEB)

    1999-07-01

    The Department of Energy (DOE) has developed this Standard to assist line managers in meeting their responsibilities for implementing occupational radiological control programs. DOE has established regulatory requirements for occupational radiation protection in Title 10 of the Code of Federal Regulations, Part 835 (10 CFR 835), ``Occupational Radiation Protection``. Failure to comply with these requirements may lead to appropriate enforcement actions as authorized under the Price Anderson Act Amendments (PAAA). While this Standard does not establish requirements, it does restate, paraphrase, or cite many (but not all) of the requirements of 10 CFR 835 and related documents (e.g., occupational safety and health, hazardous materials transportation, and environmental protection standards). Because of the wide range of activities undertaken by DOE and the varying requirements affecting these activities, DOE does not believe that it would be practical or useful to identify and reproduce the entire range of health and safety requirements in this Standard and therefore has not done so. In all cases, DOE cautions the user to review any underlying regulatory and contractual requirements and the primary guidance documents in their original context to ensure that the site program is adequate to ensure continuing compliance with the applicable requirements. To assist its operating entities in achieving and maintaining compliance with the requirements of 10 CFR 835, DOE has established its primary regulatory guidance in the DOE G 441.1 series of Guides. This Standard supplements the DOE G 441.1 series of Guides and serves as a secondary source of guidance for achieving compliance with 10 CFR 835.

  10. Massive Kaluza-Klein theories and their spontaneously broken symmetries

    Energy Technology Data Exchange (ETDEWEB)

    Hohm, O.

    2006-07-15

    In this thesis we investigate the effective actions for massive Kaluza-Klein states, focusing on the massive modes of spin-3/2 and spin-2 fields. To this end we determine the spontaneously broken gauge symmetries associated to these 'higher-spin' states and construct the unbroken phase of the Kaluza-Klein theory. We show that for the particular background AdS{sub 3} x S{sup 3} x S{sup 3} a consistent coupling of the first massive spin-3/2 multiplet requires an enhancement of local supersymmetry, which in turn will be partially broken in the Kaluza-Klein vacuum. The corresponding action is constructed as a gauged maximal supergravity in D=3. Subsequently, the symmetries underlying an infinite tower of massive spin-2 states are analyzed in case of a Kaluza-Klein compactification of four-dimensional gravity to D=3. It is shown that the resulting gravity-spin-2 theory is given by a Chern-Simons action of an affine algebra and also allows a geometrical interpretation in terms of 'algebra-valued' differential geometry. The global symmetry group is determined, which contains an affine extension of the Ehlers group. We show that the broken phase can in turn be constructed via gauging a certain subgroup of the global symmetry group. Finally, deformations of the Kaluza-Klein theory on AdS{sub 3} x S{sup 3} x S{sup 3} and the corresponding symmetry breakings are analyzed as possible applications for the AdS/CFT correspondence. (Orig.)

  11. General broken lines as advanced track fitting method

    Energy Technology Data Exchange (ETDEWEB)

    Kleinwort, Claus

    2012-01-15

    In HEP experiments the description of the trajectory of a charged particle is obtained from a fit to measurements in tracking detectors. The parametrization of the trajectory has to account for bending in the magnetic field, energy loss and multiple scattering in the detector material. General broken lines implement a track model with proper description of multiple scattering leading to linear equations with a special structure of the corresponding matrix allowing for a fast solution with the computing time depending linearly on the number of measurements. The calculation of the full covariance matrix along the trajectory enables the application to track based alignment and calibration of large detectors with global methods. (orig.)

  12. Tuning the cosmological constant, broken scale invariance, unitarity

    Energy Technology Data Exchange (ETDEWEB)

    Förste, Stefan; Manz, Paul [Bethe Center for Theoretical Physics,Nussallee 12, 53115 Bonn (Germany); Physikalisches Institut der Universität Bonn,Nussallee 12, 53115 Bonn (Germany)

    2016-06-10

    We study gravity coupled to a cosmological constant and a scale but not conformally invariant sector. In Minkowski vacuum, scale invariance is spontaneously broken. We consider small fluctuations around the Minkowski vacuum. At the linearised level we find that the trace of metric perturbations receives a positive or negative mass squared contribution. However, only for the Fierz-Pauli combination the theory is free of ghosts. The mass term for the trace of metric perturbations can be cancelled by explicitly breaking scale invariance. This reintroduces fine-tuning. Models based on four form field strength show similarities with explicit scale symmetry breaking due to quantisation conditions.

  13. Mass formulae for broken supersymmetry in curved space-time

    Energy Technology Data Exchange (ETDEWEB)

    Ferrara, Sergio [Theoretical Physics Department, CERN, Geneva (Switzerland); INFN - Laboratori Nazionali di Frascati, Frascati (Italy); Department of Physics and Astronomy, U.C.L.A, Los Angeles, CA (United States); Proeyen, Antoine van [KU Leuven, Institute for Theoretical Physics, Leuven (Belgium)

    2016-11-15

    We derive the mass formulae for N = 1, D = 4 matter-coupled Supergravity for broken (and unbroken) Supersymmetry in curved space-time. These formulae are applicable to De Sitter configurations as is the case for inflation. For unbroken Supersymmetry in anti-de Sitter (AdS) one gets the mass relations modified by the AdS curvature. We compute the mass relations both for the potential and its derivative non-vanishing. (copyright 2016 WILEY-VCH Verlag GmbH and Co. KGaA, Weinheim)

  14. The Small Step toward Asymmetry: Aesthetic Judgment of Broken Symmetries

    Directory of Open Access Journals (Sweden)

    Andreas Gartus

    2013-08-01

    Full Text Available Symmetry and complexity both affect the aesthetic judgment of abstract patterns. However, although beauty tends to be associated with symmetry, there are indications that small asymmetries can also be beautiful. We investigated the influence of small deviations from symmetry on people's aesthetic liking for abstract patterns. Breaking symmetry not only decreased patterns' symmetry but also increased their complexity. While an increase of complexity normally results in a higher liking, we found that even a small decrease of symmetry has a strong effect, such that patterns with slightly broken symmetries were significantly less liked than fully symmetric ones.

  15. Raman amplification in the broken-wave regime

    CERN Document Server

    Farmer, John P

    2015-01-01

    In regimes far beyond the wavebreaking theshold of Raman amplification, we show that significant amplifcation can occur after the onset of wavebreaking, before phase mixing destroys the coupling between pump and probe. The amplification efficiency in this regime is therefore strongly dependent on the energy-transfer rate when wavebreaking occurs, and is, as such, sensitive to both the probe amplitude and profile. In order to access the higher-efficiency broken-wave regime, a short, intense probe is required. Parameter scans show the marked difference in behaviour compared to below wavebreaking, where longer, more energetic pulses lead to improved efficiencies.

  16. Broken current anomalous dimensions, conformal manifolds and RG flows

    CERN Document Server

    Bashmakov, Vladimir; Raj, Himanshu

    2016-01-01

    We consider deformations of a conformal field theory explicitly breaking some global symmetries of the theory, addressing both cases of marginal and relevant deformations. Exploiting the constraints put by conformal symmetry, we compute anomalous dimensions of broken currents. Our analysis is done using field theory techniques and also holographic ones, where necessary. Field theoretical methods suffice to discuss e.g. symmetry-breaking deformations of the $O(N )$ model in $d=4-\\epsilon$ dimensions. Holography is instrumental, instead, to compute current anomalous dimensions in $\\beta$-deformed superconformal field theories, and in a class of $N = 1$ RG flows at large 't Hooft coupling.

  17. Radiological impacts of phosphogypsum.

    Science.gov (United States)

    Al Attar, Lina; Al-Oudat, Mohammad; Kanakri, Salwa; Budeir, Youssef; Khalily, Hussam; Al Hamwi, Ahmad

    2011-09-01

    This study was carried out to assess the radiological impact of Syrian phosphogypsum (PG) piles in the compartments of the surrounding ecosystem. Estimating the distribution of naturally occurring radionuclides (i.e. (226)Ra, (238)U, (232)Th, (210)Po and (210)Pb) in the raw materials, product and by-product of the Syrian phosphate fertilizer industry was essential. The data revealed that the concentrations of the radionuclides were enhanced in the treated phosphate ore. In PG, (226)Ra content had a mean activity of 318 Bq kg(-1). The uranium content in PG was low, ca. 33 Bq kg(-1), because uranium remained in the phosphoric acid produced. Over 80% of (232)Th, (210)Po and (210)Pb present partitioned in PG. The presence of PG piles did not increase significantly the concentration of (222)Rn or gamma rays exposure dose in the area studied. The annual effective dose was only 0.082 mSv y(-1). The geometric mean of total suspended air particulates (TSP) ca. 85 μg m(-3). The activity concentration of the radionuclides in filtrates and runoff waters were below the detection limits (ca. 0.15 mBq L(-1) for (238)U, 0.1 mBq L(-1) for (232)Th and 0.18 mBq L(-1) for both of (210)Po and (210)Pb); the concentration of the radionuclides in ground water samples and Qattina Lake were less than the permissible limits set for drinking water by the World Health Organisation, WHO, (10, 1 and 0.1 Bq L(-1) for (238)U, (232)Th and both of (210)Po and (210)Pb, respectively). Eastern sites soil samples of PG piles recorded the highest activity concentrations, i.e. 26, 33, 28, 61 and 40 Bq kg(-1) for (226)Ra, (238)U, (232)Th, (210)Po and (210)Pb, respectively, due to the prevailing western and north-western wind in the area, but remained within the natural levels reported in Syrian soil (13-32 Bq kg(-1) for (226)Ra, 24.9-62.2 Bq kg(-1) for (238)U and 10-32 Bq kg(-1) for (232)Th). The impact of PG piles on plants varied upon the plant species. Higher concentrations of the radionuclides were

  18. Mass spectra in softly broken ${\\cal N}=2$ SQCD

    CERN Document Server

    Chernyak, Victor L

    2016-01-01

    Considered is ${\\cal N}=2\\,\\, SU(N_c)$ or $U(N_c)$ SQCD with $N_c+1broken down to ${\\cal N}=1$ by the mass term $\\mu_{\\rm x}{\\rm Tr} (X^2)$ of colored adjoint scalar partners of gluons, $\\mu_{\\rm x}\\ll\\Lambda_2$ ( $\\Lambda_2$ is the scale factor of the $SU(N_c)$ gauge coupling). There is a large number of different types of vacua in this theory with both unbroken and spontaneously broken global flavor symmetry $U(N_F)\\rightarrow U({\\rm n}_1)\\times U({\\rm n}_2)$. We consider in this paper the large subset of these vacua with the unbroken nontrivial $Z_{2N_c-N_F\\geq 2}$ discrete symmetry, at different hierarchies between the Lagrangian parameters $m\\gtrless\\Lambda_2,\\, \\mu_{\\rm x}\\gtrless m$. The forms of low energy Lagrangians, quantum numbers of light particles and mass spectra are described for all these vacua. Our results differ from corresponding results in recent papers arXiv:1304.0822; 1403.60...

  19. Soflty broken supersymmetry and the fine-tuning problem

    Energy Technology Data Exchange (ETDEWEB)

    Foda, O.E.

    1984-02-20

    The supersymmetry of the simple Wess-Zumino model is broken, in the tree-approximation, by adding all possible parity-even(mass)-dimension 2 and 3 terms. The model is then renormalized using BPHZ and the normal product algorithm, such that supersymmetry is only softly broken (in the original sense of Schroer and Symanzik). We show that, within the above renormalization scheme, none of the added breaking terms give rise to technical fine-tuning problems (defined in the sense of Gildener) in larger models, with scalar multiplets and hierarchy of mass scales, which is in contrast to what we obtain via analytic schemes such as dimensional renormalization, or supersymmetry extension of which. The discrepancy (which can be shown to persist in more general models) originates in the inherent local ambiguity in the finite parts of subtracted Feynman integrals. Emphasizing that the issue is purely technical (as opposed to physical) in origin, and that all physical properties are scheme-independent (as they should be), we conclude that the technical fine-tuning problem, in the specific sense used in this paper, being scheme dependent, is not a well-defined issue within the context of renormalized perturbation theory. 30 references.

  20. Banishment in Public Housing: Testing an Evolution of Broken Windows

    Directory of Open Access Journals (Sweden)

    Jose Torres

    2016-10-01

    Full Text Available Banishment policies grant police the authority to formally ban individuals from entering public housing and arrest them for trespassing if they violate the ban. Despite its widespread use and the social consequences resulting from it, an empirical evaluation of the effectiveness of banishment has not been performed. Understanding banishment enforcement is an evolution of broken windows policing, this study explores how effective bans are at reducing crime in public housing. We analyze crime data, spanning the years 2001–2012, from six public housing communities and 13 surrounding communities in one southeastern U.S. city. Using Arellano-Bond dynamic panel models, we investigate whether or not issuing bans predicts reductions in property and violent crimes as well as increases in drug and trespass arrests in public housing. We find that this brand of broken windows policing does reduce crime, albeit relatively small reductions and only for property crime, while resulting in an increase in trespass arrests. Given our findings that these policies have only a modest impact on property crime, yet produce relatively larger increases in arrests for minor offenses in communities of color, and ultimately have no significant impact on violent crime, it will be important for police, communities, and policy makers to discuss whether the returns are worth the potential costs.

  1. Classification of Broken Rice Kernels using 12D Features

    Directory of Open Access Journals (Sweden)

    SUNDER ALI KHOWAJA

    2016-07-01

    Full Text Available Integrating the technological aspect for assessment of rice quality is very much needed for the Asian markets where rice is one of the major exports. Methods based on image analysis has been proposed for automated quality assessment by taking into account some of the textural features. These features are good at classifying when rice grains are scanned in controlled environment but it is not suitable for practical implementation. Rice grains are placed randomly on the scanner which neither maintains the uniformity in intensity regions nor the placement strategy is kept ideal thus resulting in false classification of grains. The aim of this research is to propose a method for extracting set of features which can overcome the said issues. This paper uses morphological features along-with gray level and Hough transform based features to overcome the false classification in the existing methods. RBF (Radial Basis function is used as a classification mechanism to classify between complete grains and broken grains. Furthermore the broken grains are classified into two classes? i.e. acceptable grains and non-acceptable grains. This research also uses image enhancement technique prior to the feature extraction and classification process based on top-hat transformation. The proposed method has been simulated in MATLAB to visually analyze and validate the results.

  2. Evidence of Broken Reciprocity in Chiral Liquid Crystals

    Science.gov (United States)

    Moreira, Michele; Venkataraman, Nithya; Taheri, Bahman; Palffy-Muhoray, Peter

    2008-03-01

    Reciprocity in light scattering is predicated on bounded scattering media with symmetric and linear permittivity, conductivity and permeability. Due to their anisotropy and chirality, cholesteric liquid crystal form periodic dielectric structures. If the periodicity is comparable to the wavelength of light, these phases are self-assembled photonic band gap structures. There appear in the permittivity odd powers of the wave vector resulting from nonlocality and broken inversion symmetry. Evidence of non-reciprocity has been found in optically active crystals by Bennett [1] and in stacks of cholesteric and nematic liquid crystal cells by Takezoe [2]. We present experimental data showing broken reciprocity in transmittance and reflectance in cholesteric cells with different pitches having overlapping but distinct reflection bands. We explain our results in terms of simple analytic descriptions of material properties and propagating modes. [1] P.J. Bennett, S. Dhanjal, Yu. P. Svirko and N. I. Zheludev, Opt. Lett. 21, 1955 (1996) [2] J. Hwang; M.H. Song; B. Park; S. Nishimura; T. Toyooka; J.W. Wu; Y. Takanishi; K. Ishikawa; H. Takezoe, Nat. Mat. 4, 383 (2005).

  3. Water-resisting ability of cemented broken rocks

    Institute of Scientific and Technical Information of China (English)

    Yu Bangyong; Chen Zhanqing; Yu Linli

    2016-01-01

    Using the self-designed testing system, the seepage tests for cemented broken rocks were conducted, and the impact of different factors on water-resisting ability was analyzed. The results show that (1) seepage process of the cemented broken rocks can be divided into two categories:in one category, seepage insta-bility occurs after a period of time, in the other, the permeability decreases slowly and tends to be stable, and seepage instability does not occur;(2) cementing performance of cementing agent and grain size dis-tribution are the decisive factors for water-resisting ability, with the increase of cementing performance and the mass percentage of large grains, the water-resisting ability of the specimen strengthens; (3) aggregate type has little effect on seepage stability, for the specimens with different aggregate types, the permeability and the duration of seepage instability have small difference; (4) initial porosity has a certain effect on the water-resisting ability of the specimen, but has no decisive role. With the increase of the initial porosity, the duration of seepage instability decreases.

  4. Recognition of Damaged Arrow-Road Markings by Visible Light Camera Sensor Based on Convolutional Neural Network

    Directory of Open Access Journals (Sweden)

    Husan Vokhidov

    2016-12-01

    Full Text Available Automobile driver information as displayed on marked road signs indicates the state of the road, traffic conditions, proximity to schools, etc. These signs are important to insure the safety of the driver and pedestrians. They are also important input to the automated advanced driver assistance system (ADAS, installed in many automobiles. Over time, the arrow-road markings may be eroded or otherwise damaged by automobile contact, making it difficult for the driver to correctly identify the marking. Failure to properly identify an arrow-road marker creates a dangerous situation that may result in traffic accidents or pedestrian injury. Very little research exists that studies the problem of automated identification of damaged arrow-road marking painted on the road. In this study, we propose a method that uses a convolutional neural network (CNN to recognize six types of arrow-road markings, possibly damaged, by visible light camera sensor. Experimental results with six databases of Road marking dataset, KITTI dataset, Málaga dataset 2009, Málaga urban dataset, Naver street view dataset, and Road/Lane detection evaluation 2013 dataset, show that our method outperforms conventional methods.

  5. New result on K{sup +} {r_arrow} {pi}{sup +} {nu}{bar {nu}} from BNL E787

    Energy Technology Data Exchange (ETDEWEB)

    REDLINGER,G.

    1999-06-21

    E787 at BNL has reported evidence for the rare decay K{sup +} {r_arrow} {pi}{sup +}{nu}{bar {nu}}, based on the observation of one candidate event. In this paper, we present the result of analyzing a new dataset of comparable sensitivity to the published result.

  6. Radiology information management system, TOSRIM

    Energy Technology Data Exchange (ETDEWEB)

    Tani, Yuichiro; Uchiyama, Akira; Kimura, Hirohito (Toshiba Corp., Kawasaki, Kanagawa (Japan))

    1991-02-01

    This is a report on a new type of distributed computer system for radiology departments named 'TOSRIM' (Toshiba radiology information management system), which is designed to be installed between medical diagnosis equipment and a host computer system in a hospital. Recently, a new type of host computer system has been developed which enables doctors to order any of the hospital's entire activities using terminals. By connecting 'TOSRIM' to this type of host computer system, many of the activities of a radiology department can be carried out via terminals without the use of examination requirement forms. As well as being connected to medical diagnosis equipment, 'TOSRIM' can also be connected to a medical imaging system which stores and displays medical images. By means of these connections, doctors will be able to diagnose medical images using display terminals without the need for films. (author).

  7. Radiological control manual. Revision 1

    Energy Technology Data Exchange (ETDEWEB)

    Kloepping, R.

    1996-05-01

    This Lawrence Berkeley National Laboratory Radiological Control Manual (LBNL RCM) has been prepared to provide guidance for site-specific additions, supplements and interpretation of the DOE Radiological Control Manual. The guidance provided in this manual is one methodology to implement the requirements given in Title 10 Code of Federal Regulations Part 835 (10 CFR 835) and the DOE Radiological Control Manual. Information given in this manual is also intended to provide demonstration of compliance to specific requirements in 10 CFR 835. The LBNL RCM (Publication 3113) and LBNL Health and Safety Manual Publication-3000 form the technical basis for the LBNL RPP and will be revised as necessary to ensure that current requirements from Rules and Orders are represented. The LBNL RCM will form the standard for excellence in the implementation of the LBNL RPP.

  8. Managing Generational Differences in Radiology.

    Science.gov (United States)

    Eastland, Robin; Clark, Kevin R

    2015-01-01

    Diversity can take many forms. One type of recent focus is generational differences and intergenerational issues. Much research exists regarding generational differences in the workplace and in healthcare as a whole. Very little has been done on generational differences within the field of radiology. An analysis of current research of generational differences within radiology, nursing, and healthcart in general was performed to identify current trends and establish similarities and discordance in available studies. An emphasis was placed on how generational differences influence education, teamwork, and patient care, along with what challenges and opportunities exist for managers, leaders, and organizations.

  9. Characterization of X-ray fields at the center for devices and radiological health

    Energy Technology Data Exchange (ETDEWEB)

    Cerra, F. [Center for Devices and Radiological Health, Rockville, MD (United States)

    1993-12-31

    This talk summarizes the process undertaken by the Center for Devices and Radiological Health (CDRH) for establishing reference x-ray fields in its accredited calibration laboratory. The main considerations and their effects on the calibration parameters are discussed. The characterization of fields may be broken down into two parts: (1) the initial setup of the calibration beam spectra and (2) the ongoing measurements and controls which ensure consistency of the reference fields. The methods employed by CDRH for both these stages and underlying considerations are presented. Uncertainties associated with the various parameters are discussed. Finally, the laboratory`s performance, as evidenced by ongoing measurement quality assurance results, is reported.

  10. Asymmetric transport of light in arrow-shape photonic crystal waveguides

    Science.gov (United States)

    Rahal, H.; AbdelMalek, F.

    2017-03-01

    In this paper, we report a design of an asymmetric light propagation based on the Photonic Crystal (PC) structure. The proposed PC is constructed of an arrow-shaped structure integrating different rows of air holes which offer more than 65% transmission in one direction and less than 1% in the opposite direction. The proposed PC is based on the use of two parallel PC waveguides with different air holes in a single platform. The design, optimization and performance of the PC waveguide devices are carried out by employing in-house accurate 2D Finite Difference Time Domain (2D FDTD) computational techniques. Our preliminary numerical simulation results show that complete asymmetric transmission can be achieved in the proposed single structure which would play a significant contribution on realization of high-volume nanoscale photonic integrated circuitry.

  11. Residual hydrocarbon toxicity in sediments impacted by the 1970 Arrow spill

    Energy Technology Data Exchange (ETDEWEB)

    Lee, K.; Wohlgeschaffen, G.D.; Tremblay, G.H. [Fisheries and Oceans. Inst. Maurice Lamontagne, Mont-Joli, PQ (Canada); Vandermeulen, J.H.; Mossman, D.C. [Fisheries and Oceans. Bedford Institute of Oceanography, Dartmouth, NS (Canada); Doe, K.G.; Jackman, P.M. [Environment Canada. Environmental Science Centre, Moncton, NB (Canada); Prince, R.C.; Garrett, R.M.; Haith, C.E. [Exxon Research and Engineering Co., Annandale, NJ (United States)

    1998-09-01

    An assessment of the biological effects associated with a marine oil spill that occurred more than twenty years ago was presented. In 1970, 2,045 m{sup 3} of Bunker C crude oil impacted 300 km of Nova Scotia`s coastline when the tanker Arrow ran aground. Only 10 per cent of the contaminated shoreline was subjected to cleanup. The other 90 per cent was left to degrade naturally. In 1993 and 1997, samples of sediment and interstitial water were collected in areas where residual oil from the spill was still evident. Chemical analysis has shown that the oil has undergone substantial biodegradation. As a result of natural attenuation process for more than a 20 year period, the toxicity of the residual oil has been reduced. Substantial evidence of habitat recovery was also found. 43 res., 2 tabs., 6 figs.

  12. Scan path entropy and Arrow plots: Capturing scanning behavior of multiple observers

    Directory of Open Access Journals (Sweden)

    Ignace T C Hooge

    2013-12-01

    Full Text Available Designers of visual communication material want their material to attract and retain attention. In marketing research, heat maps, dwell time, and time to AOI first hit are often used as evaluation parameters. Here we present two additional measures 1 scan path entropy to quantify gaze guidance and 2 the arrow plot to visualize the average scan path. Both are based on string representations of scan paths. The latter also incorporates transition matrices and time required for 50% of the observers to first hit AOIs (T50. The new measures were tested in an eye tracking study (48 observers, 39 advertisements. Scan path entropy is a sensible measure for gaze guidance and the new visualization method reveals aspects of the average scan path and gives a better indication in what order global scanning takes place.

  13. Symmetry and the arrow of time in theoretical black hole astrophysics

    CERN Document Server

    Garofalo, David

    2015-01-01

    While the basic laws of physics seem time-reversal invariant, our understanding of the apparent irreversibility of the macroscopic world is well grounded in the notion of entropy. Because astrophysics deals with the largest structures in the Universe, one expects evidence there for the most pronounced entropic arrow of time. However, in recent theoretical astrophysics work it appears possible to identify constructs with time-reversal symmetry, which is puzzling in the large-scale realm especially because it involves the engines of powerful outflows in active galactic nuclei which deal with macroscopic constituents such as accretion disks, magnetic fields, and black holes. Nonetheless, the underlying theoretical structure from which this accreting black hole framework emerges displays a time-symmetric harmonic behavior, a feature reminiscent of basic and simple laws of physics. While we may expect such behavior for classical black holes due to their simplicity, manifestations of such symmetry on the scale of g...

  14. On The Origin Of The Classical And Quantum Electrodynamic Arrows Of Time

    CERN Document Server

    Leiter, Darryl

    2009-01-01

    In order to describe the microscopic classical electrodynamic measurement process in an operational, relativistic, observer-participant manner, an Abelian operator symmetry of microscopic observer-participation called Measurement Color (MC) is incorporated into the field theoretic structure of the Classical Electrodynamics (CED) of interacting point charges. The new formalism, called Measurement Color Classical Electrodynamics (MC-CED), is shown to be a nonlocal, time reversal violating, classical field theory of interacting point charges in which a microscopic classical electrodynamic arrow of time emerges dynamically, independent of any external thermodynamic or cosmological assumptions. We then show how the standard canonical quantum field quantization program can be applied to the classical observer-participant MC-CED theory. This leads to the development of a relativistic, observer-participant Measurement Color Quantum Electrodynamic (MC-QED) formalism in the Heisenberg Picture, which contains an intrins...

  15. Study of advanced composite structural design concepts for an arrow wing supersonic cruise configuration

    Science.gov (United States)

    Turner, M. J.; Grande, D. L.

    1978-01-01

    Based on estimated graphite and boron fiber properties, allowable stresses and strains were established for advanced composite materials. Stiffened panel and conventional sandwich panel concepts were designed and analyzed, using graphite/polyimide and boron/polyimide materials. The conventional sandwich panel was elected as the structural concept for the modified wing structure. Upper and lower surface panels of the arrow wing structure were then redesigned, using high strength graphite/polyimide sandwich panels, retaining the titanium spars and ribs from the prior study. The ATLAS integrated analysis and design system was used for stress analysis and automated resizing of surface panels. Flutter analysis of the hybrid structure showed a significant decrease in flutter speed relative to the titanium wing design. The flutter speed was increased to that of the titanium design by selective increase in laminate thickness and by using graphite fibers with properties intermediate between high strength and high modulus values.

  16. [Radiological media and modern supporting tools in radiology].

    Science.gov (United States)

    Sachs, A; Pokieser, P

    2014-01-01

    Radiology is a field with a high demand on information. Nowadays, a huge variety of electronic media and tools exists in addition to the classical media. Asynchronous and synchronous e-learning are constantly growing and support radiology with case collections, webinars and online textbooks. Various internet resources, social media and online courses have been established. Dynamic websites show a variety of interactive elements and it is easier and faster to access large amounts of data. Social media have an exponentially growing number of users and enable an efficient collaboration as well as forming professional networks. Massive open online courses (MOOCs) complete the offer of education and increase the opportunity to take part in educational activities. Apart from the existing variety of resources it is essential to focus on a critical selection for using these radiological media. It is reasonable to combine classical and electronic media instead of a one-sided use. As dynamic as the progress in the field of radiological media and its tools may be, the personal contact remains and should be maintained.

  17. Preparation and characterisation of irradiated crab chitosan and New Zealand Arrow squid pen chitosan

    Energy Technology Data Exchange (ETDEWEB)

    Shavandi, Amin, E-mail: amin.shavandi@postgrad.otago.ac.nz [Department of Food Sciences, University of Otago, Dunedin (New Zealand); Bekhit, Adnan A. [Department of Pharmaceutical Chemistry, Faculty of Pharmacy, University of Alexandria, Alexandria (Egypt); Bekhit, Alaa El-Din A. [Department of Food Sciences, University of Otago, Dunedin (New Zealand); Sun, Zhifa [Department of Physics, University of Otago, Dunedin (New Zealand); Ali, M. Azam [Department of Applied Sciences, University of Otago, Dunedin (New Zealand)

    2015-11-01

    The properties of chitosan from Arrow squid (Nototodarus sloanii) pen (CHS) and commercial crab shell (CHC) were investigated using FTIR, DSC, SEM and XRD before and after irradiation at the dose of 28 kGy in the presence or absence of 5% water. Also, the viscosity, deacetylation degree, water and oil holding capacities, colour and antimicrobial activities of the chitosan samples were determined. Irradiation decreased (P < 0.05) the viscosity of CHC from 0.21 to 0.03 Pa s and of CHS from 1.71 to 0.23 Pa s. The inclusion of water had no effect on the viscosity of irradiated chitosan. Irradiation did not affect the degree of deacetylation of CHC, but increased the deacetylation degree of CHS from 72.78 to 82.29% in samples with 5% water. Water and oil holding capacities of CHS (1197.30% and 873.3%, respectively) were higher (P < 0.05) than those found in CHC (340.70% and 264.40%, respectively). The water and oil holding capacities were decreased for both types of chitosan irradiation, but were not affected by the addition of water. Squid pen chitosan was whiter in colour (White Index = 90.06%) compared to CHC (White Index = 83.70%). Generally, the CHC samples (control and irradiated) exhibited better antibacterial activity compared to CHS, but the opposite was observed with antifungal activity. - Highlights: • Chitosan prepared from Arrow squid pens (Nototodarus sloanii). • Chitosan samples were gamma irradiated at 28 kGy. • Squid pen chitosan showed high fat and water uptake capacities compared to crab shell chitosan. • Gamma irradiation enhanced the DDA of squid pen chitosan but not crab shell chitosan.

  18. Numerical and physical modelling of oil spreading in broken ice

    Energy Technology Data Exchange (ETDEWEB)

    Gjoesteen, Janne K. Oekland

    2002-07-01

    The present work focuses on oil spreading in broken ice and the content of this thesis falls into three categories: 1) The physical and numerical modelling of oil spreading in ice. 2) Ice models and parameters describing the ice cover. 3) Experiments on oil spreading in broken ice. A background study was carried out to investigate existing models for simulating oil in broken ice. Most of them describe motion of oil simply as a function of the ice motion and do not take advantage of the possibilities that recent ice models provide. We decided to choose another direction, starting from scratch with equations describing the flow of oil on top of a water surface. The equations were implemented numerically, including proper boundary conditions to account for the presence of physical restrictions in the form of ice floes in the simulation area. The implementation was designed to be able to apply data on ice motion calculated by an existing dynamic ice model. A first validation of the model was carried out using existing experimental data. As those data were obtained in a different setting, the recorded parameters and set-up of the experiment were not ideal for our purpose. However, we were able to conclude that our model behaviour was reasonable. We have carried out statistical analysis on meteorological data of wind speeds, temperatures, flow sizes and ice thickness to obtain probability distributions describing the parameters. Those data has been collected in the Pechora Sea. Wind and temperature had been recorded for a period of 30-40 years. For this region we also had available Argos satellite data from four buoys drifting in the ice in April-June 1998. The Argos data were carefully analysed to suggest probability distributions and return periods for certain speeds. (Indoor basin tests were carried out to obtain data on spreading of oil in broken ice. A set of 20 tests was conducted, each with different type of oil, ice concentration, slush concentration or ice

  19. Excitation of dark plasmonic modes in symmetry broken terahertz metamaterials.

    Science.gov (United States)

    Chowdhury, Dibakar Roy; Su, Xiaofang; Zeng, Yong; Chen, Xiaoshuang; Taylor, Antoinette J; Azad, Abul

    2014-08-11

    Plasmonic structures with high symmetry, such as double-identical gap split ring resonators, possess dark eigenmodes. These dark eigenmodes are dominated by magnetic dipole and/or higher-order multi-poles such as electric quadrapoles. Consequently these dark modes interact very weakly with the surrounding environment, and can have very high quality factors (Q). In this work, we have studied, experimentally as well as theoretically, these dark eigenmodes in terahertz metamaterials. Theoretical investigations with the help of classical perturbation theory clearly indicate the existence of these dark modes in symmetric plasmonic metamaterials. However, these dark modes can be excited experimentally by breaking the symmetry within the constituting metamaterial resonators cell, resulting in high quality factor resonance mode. The symmetry broken metamaterials with such high quality factor can pave the way in realizing high sensitivity sensors, in addition to other applications.

  20. Broken-Plane Maneuver Applications for Earth to Mars Trajectories

    Science.gov (United States)

    Abilleira, Fernando

    2007-01-01

    Optimization techniques are critical when investigating Earth to Mars trajectories since they have the potential of reducing the total (delta)V of a mission. A deep space maneuver (DSM) executed during the cruise may improve a trajectory by reducing the total mission V. Nonetheless, DSMs not only may improve trajectory performance (from an energetic point of view) but also open up new families of trajectories that would satisfy very specific mission requirements not achievable with ballistic trajectories. In the following pages, various specific examples showing the potential advantages of the usage of broken plane maneuvers will be introduced. These examples correspond to possible scenarios for Earth to Mars trajectories during the next decade (2010-2020).

  1. Bounce and cyclic cosmology in weakly broken galileon theories

    CERN Document Server

    Banerjee, Shreya

    2016-01-01

    We investigate the bounce and cyclicity realization in the framework of weakly broken galileon theories. We study bouncing and cyclic solutions at the background level, reconstructing the potential that can give rise to a given scale factor, and presenting analytical expressions for the bounce requirements. We proceed to a detailed investigation of the perturbations, which after crossing the bouncing point give rise to various observables, such as the scalar and tensor spectral indices and the tensor-to-scalar ratio. Although the scenario at hand shares the disadvantage of all bouncing models, namely that it provides a large tensor-to-scalar ratio, introducing an additional light scalar significantly reduces it through the kinetic amplification of the isocurvature fluctuations.

  2. Desert wanderings: pathways for whole, broken and shattered psyches.

    Science.gov (United States)

    Joseph, S M

    2000-07-01

    This paper challenges an implicit assumption of analytical psychology that centred, mandalic images express psychical wholeness in an optimal fashion across cultures and eras. I suggest that liminal, bardo-like eras, such as our 'post-modern' one, constellate complex, antithetical and ec-centric images, which are process-oriented and which encompass wholeness and fragmentation, conjunction and disjunction, thus holding and expressing actual individual and collective experience. In our era, we inhabit unfolding states of wholeness, brokenness and fragmentation. Images of wholeness, emerging spontaneously from the unconscious, may reflect part or all of these contradictory realities. Examples of such antithetical Self-images are developed from the ancient midrashic traditions of the rabbis; from Jung's contemporary exposition of Pauli's 'world-clock' dream; from Kepler's discovery, at the dawn of modernity, that the planets circled the sun in ellipses rather than circles; and from a clinical illustration.

  3. Phases of holographic superconductors with broken translational symmetry

    CERN Document Server

    Baggioli, Matteo

    2015-01-01

    We consider holographic superconductors in a broad class of massive gravity backgrounds. These theories provide a holographic description of a superconductor with broken translational symmetry. Such models exhibit a rich phase structure: depending on the values of the temperature and the doping the boundary system can be in superconducting, normal metallic or normal pseudo-insulating phases. Furthermore the system supports interesting collective excitations of the charge carriers, which appears in the normal phase, persists in the superconducting phase, but eventually gets destroyed by the superconducting condensate. We also show the possibility of building a phase diagram of a system with the superconducting phase occupying a dome-shaped region, therefore resembling more of a real-world doped high-Tc superconductor.

  4. Gauge-Higgs unification with broken flavour symmetry

    Energy Technology Data Exchange (ETDEWEB)

    Olschewsky, M.

    2007-05-15

    We study a five-dimensional Gauge-Higgs unification model on the orbifold S{sup 1}/Z{sub 2} based on the extended standard model (SM) gauge group SU(2){sub L} x U(1){sub Y} x SO(3){sub F}. The group SO(3){sub F} is treated as a chiral gauged flavour symmetry. Electroweak-, flavour- and Higgs interactions are unified in one single gauge group SU(7). The unified gauge group SU(7) is broken down to SU(2){sub L} x U(1){sub Y} x SO(3){sub F} by orbifolding and imposing Dirichlet and Neumann boundary conditions. The compactification scale of the theory is O(1) TeV. Furthermore, the orbifold S{sup 1}/Z{sub 2} is put on a lattice. This setting gives a well-defined staring point for renormalisation group (RG) transformations. As a result of the RG-flow, the bulk is integrated out and the extra dimension will consist of only two points: the orbifold fixed points. The model obtained this way is called an effective bilayered transverse lattice model. Parallel transporters (PT) in the extra dimension become nonunitary as a result of the blockspin transformations. In addition, a Higgs potential V({phi}) emerges naturally. The PTs can be written as a product e{sup A{sub y}}e{sup {eta}}e{sup A{sub y}} of unitary factors e{sup A{sub y}} and a selfadjoint factor e{sup {eta}}. The reduction 48 {yields} 35 + 6 + anti 6 + 1 of the adjoint representation of SU(7) with respect to SU(6) contains SU(2){sub L} x U(1){sub Y} x SO(3){sub F} leads to three SU(2){sub L} Higgs doublets: one for the first, one for the second and one for the third generation. Their zero modes serve as a substitute for the SM Higgs. When the extended SM gauge group SU(2){sub L} x U(1){sub Y} x SO(3){sub F} is spontaneously broken down to U(1){sub em}, an exponential gauge boson mass splitting occurs naturally. At a first step SU(2){sub L} x U(1){sub Y} x SO(3){sub F} is broken to SU(2){sub L} x U(1){sub Y} by VEVs for the selfadjoint factor e{sup {eta}}. This breaking leads to masses of flavour changing SO(3){sub F

  5. How to Read Your Radiology Report

    Science.gov (United States)

    ... Site Index A-Z How to Read Your Radiology Report Imaging studies such as magnetic resonance imaging ( ... this article. top of page Sections of the Radiology Report Type of exam The type of exam ...

  6. Fractal Characteristics and Fractal Dimension Measurement on Broken Surfaces of Aluminum Electric Porcelain

    Institute of Scientific and Technical Information of China (English)

    YANG Zhiyuan; ZHOU Anning

    2005-01-01

    The characteristics of broken surfaces were researched by a scanning electron microscope (SEM) and a reflection microscope, and the fractal dimensions of broken surfaces were measured by the Slit Island method. The experimental results indicate that the broken surface of aluminum electric porcelain is a fractal body in statistics, and the fractal dimensions of broken surfaces are different with the different amplification multiple value.In all of measured fractal dimensions,both of values measured in 100× under reflection microscope and in 500× under SEM are maximum, whereas the values measured in 63× under reflection microscope and in 2000× under SEM are obviously minimum. The fractal dimensions of broken surfaces are also affected by the degrees of gray comparison and the kinds of measuring methods. The relationships between the fractal dimensions of broken surfaces and porcelain bend strengths are that they are in positive correlation on the low multiples and in negative correlation on the high multiples.

  7. INFLUENCE OF BROKEN ROTOR BARS LOCATION IN THE SQUIRREL CAGE INDUCTION MOTOR USING FINITE ELEMENT METHOD

    Directory of Open Access Journals (Sweden)

    N. Halem

    2013-06-01

    Full Text Available It is well known that the number of broken bars and varying load affect on the amplitudes of specific harmonic components in the process analysis of induction motors under broken rotor bars. The location of broken bars is an important factor which affects the diagnosis of the broken bars defect. In this paper the simulation is determinate for different cases for distribution of broken bars under induction motor pole in order to show the impact of broken bars location upon the amplitude of harmonic fault. The simulation results are obtained by using time stepping finite elements (TSFE method. The geometrical characteristics of motor, the effects of slotting and the magnetic saturation of lamination core are included in induction motor model.

  8. INFLUENCE OF BROKEN ROTOR BARS LOCATION IN THE SQUIRREL CAGE INDUCTION MOTOR USING FINITE ELEMENT METHOD

    Directory of Open Access Journals (Sweden)

    N. Halem

    2015-07-01

    Full Text Available It is well known that the number of broken bars and varying load affect on the amplitudes of specific harmonic components  in the process analysis of induction motors under broken rotor bars. The location of broken bars is an important factor which affects the diagnosis of the broken bars defect. In this paper the simulation is determinate for different cases for distribution of broken bars under induction motor pole in order to show the impact of broken bars location upon the amplitude of harmonic fault. The simulation results are obtained by using time stepping finite elements (TSFE method. The geometrical characteristics of motor, the effects of slotting and the magnetic saturation of lamination core are included in induction motor model.

  9. Radiologic Technology Occupations. Curriculum Guide.

    Science.gov (United States)

    Reneau, Fred; And Others

    This guide delineates the tasks and performance standards for radiologic technology occupations. It includes job seeking skills, work attitudes, energy conservation practices, and safety. The guide is centered around the three domains of learning: psychomotor, cognitive, and affective. For each duty, the following are provided: task, standard of…

  10. International Data on Radiological Sources

    Energy Technology Data Exchange (ETDEWEB)

    Martha Finck; Margaret Goldberg

    2010-07-01

    ABSTRACT The mission of radiological dispersal device (RDD) nuclear forensics is to identify the provenance of nuclear and radiological materials used in RDDs and to aid law enforcement in tracking nuclear materials and routes. The application of databases to radiological forensics is to match RDD source material to a source model in the database, provide guidance regarding a possible second device, and aid the FBI by providing a short list of manufacturers and distributors, and ultimately to the last legal owner of the source. The Argonne/Idaho National Laboratory RDD attribution database is a powerful technical tool in radiological forensics. The database (1267 unique vendors) includes all sealed sources and a device registered in the U.S., is complemented by data from the IAEA Catalogue, and is supported by rigorous in-lab characterization of selected sealed sources regarding physical form, radiochemical composition, and age-dating profiles. Close working relationships with global partners in the commercial sealed sources industry provide invaluable technical information and expertise in the development of signature profiles. These profiles are critical to the down-selection of potential candidates in either pre- or post- event RDD attribution. The down-selection process includes a match between an interdicted (or detonated) source and a model in the database linked to one or more manufacturers and distributors.

  11. 21 CFR 892.1980 - Radiologic table.

    Science.gov (United States)

    2010-04-01

    ... 21 Food and Drugs 8 2010-04-01 2010-04-01 false Radiologic table. 892.1980 Section 892.1980 Food and Drugs FOOD AND DRUG ADMINISTRATION, DEPARTMENT OF HEALTH AND HUMAN SERVICES (CONTINUED) MEDICAL DEVICES RADIOLOGY DEVICES Diagnostic Devices § 892.1980 Radiologic table. (a) Identification. A...

  12. 10 CFR 835.501 - Radiological areas.

    Science.gov (United States)

    2010-01-01

    ... 10 Energy 4 2010-01-01 2010-01-01 false Radiological areas. 835.501 Section 835.501 Energy DEPARTMENT OF ENERGY OCCUPATIONAL RADIATION PROTECTION Entry Control Program § 835.501 Radiological areas. (a) Personnel entry control shall be maintained for each radiological area. (b) The degree of control shall...

  13. Pediatric radiology for medical-technical radiology assistants/radiologists; Paediatrische Radiologie fuer MTRA/RT

    Energy Technology Data Exchange (ETDEWEB)

    Oppelt, Birgit

    2010-07-01

    The book on pediatric radiology includes the following chapter: differences between adults and children; psycho-social aspects concerning the patient child in radiology; relevant radiation doses in radiology; help for self-help: simple phantoms for image quality estimation in pediatric radiology; general information; immobilization of the patient; pediatric features for radiological settings; traumatology; contrast agents; biomedical radiography; computerized tomography; NMR imaging; diagnostic ultrasonography; handling of stress practical recommendations; medical displays.

  14. Reactions {ital pd}{r_arrow}{sup 3}He{eta} and {ital pd}{r_arrow}{sup 3}He{pi}{sup +}{pi}{sup {minus}} near the {eta} threshold

    Energy Technology Data Exchange (ETDEWEB)

    Mayer, B.; Boudard, A.; Fabbro, B.; Garcon, M.; Kerboul, C.; Poitou, J.; Wellers, F. [Service de Physique Nucleaire, CEA Saclay, F-91191 Gif-sur-Yvette (France); Jacobs, W.W.; Saudinos, J.; Tomasi-Gustafsson, E. [Laboratoire National Saturne, F-91191 Gif-sur-Yvette (France); Mouly, J.P. [Service d`Etudes des Detecteurs, CEA Saclay, F-91191 Gif-sur-Yvette (France); Kessler, R.S.; Nefkens, B.M.; Tippens, B. [Department of Physics, University of California, Los Angeles, California 90024 (United States); van der Schaaf, A. [Physik-Institut der Universitaet Zuerich, CH-8057 Zuerich (Switzerland); Abegg, R.; van Oers, W.T. [TRIUMF, 4004 Wesbrook Mall, Vancouver, British Columbia, V6T 2A3 (CANADA); Briscoe, W.; Petrov, A. [Center for Nuclear Studies and Department of Physics, The George Washington University, Washington, D.C. 20052 (United States); Moalem, A. [Department of Physics, Ben Gurion University, Beer-Sheva 84105 (Israel)

    1996-05-01

    The reaction {ital pd}{r_arrow}{sup 3}He{eta} has been studied with the SPES2 spectrometer, for proton energies between 0.2 MeV and 11 MeV above threshold. The total cross section rises from 0.25 to 0.40 {mu}b in this region. The observed energy dependence can be attributed to the strong final state interaction. The angular distribution is nearly isotropic, consistent with {ital S} wave production. A measurement of the {ital pd}{r_arrow}{sup 3}He{pi}{sup +}{pi}{sup {minus}} cross section in the threshold region is also presented. The setup, which is capable of producing 10{sup 5} tagged {eta}/s with only a few percent background, is used to investigate rare {eta} decays. {copyright} {ital 1996 The American Physical Society.}

  15. Prospects for measuring K{sup +} {r_arrow} {pi}{sup +} {nu}{bar {nu}} and K{sub L}{sup 0} {r_arrow} {pi}{sup 0} {nu}{bar {nu}} at BNL

    Energy Technology Data Exchange (ETDEWEB)

    Bryman, D.A.; Littenberg, L.

    2000-09-18

    Rare kaon decay experiments underway or planned for the BNL AGS will yield new and independent determinations of V*{sub ts}V{sub td}. A measurement of B(K{sub L}{sup 0} {r_arrow} {pi}{sup 0} {nu}{bar {nu}}) allows a determination of the imaginary part of this quantity, which is the fundamental CP-violating parameter of the Standard Model, in a uniquely clean manner. Since the measurement of B(K{sup +} {r_arrow} {pi}{sup +} {nu}{bar {nu}}) determines {vert_bar}V*{sub ts}V{sub td}, a complete derivation of the unitarity triangle is facilitated. These results can be compared to high precision data expected to come from the B sector in a number of ways, allowing for unique tests of new physics.

  16. Radiology education: a glimpse into the future

    Energy Technology Data Exchange (ETDEWEB)

    Scarsbrook, A.F. [Department of Radiology, John Radcliffe Hospital, Headley Way, Headington, Oxford (United Kingdom)]. E-mail: andyscarsbrook1@aol.com; Graham, R.N.J. [Department of Radiology, John Radcliffe Hospital, Headley Way, Headington, Oxford (United Kingdom); Perriss, R.W. [Department of Radiology, John Radcliffe Hospital, Headley Way, Headington, Oxford (United Kingdom)

    2006-08-15

    The digital revolution in radiology continues to advance rapidly. There are a number of interesting developments within radiology informatics which may have a significant impact on education and training of radiologists in the near future. These include extended functionality of handheld computers, web-based skill and knowledge assessment, standardization of radiological procedural training using simulated or virtual patients, worldwide videoconferencing via high-quality health networks such as Internet2 and global collaboration of radiological educational resources via comprehensive, multi-national databases such as the medical imaging resource centre initiative of the Radiological Society of North America. This article will explore the role of e-learning in radiology, highlight a number of useful web-based applications in this area, and explain how the current and future technological advances might best be incorporated into radiological training.

  17. Feynman Clocks, Casual Networks, and the Origin of Hierarchical "Arrows of Time" in Complex Systems from the Big Bang to the Brain

    CERN Document Server

    Hitchcock, S M

    2000-01-01

    A theory of 'time' as a form of 'information' is proposed. New tools such as Feynman Clocks, Collective Excitation Networks, Sequential Excitation Networks, Plateaus of Complexity, Causal Networks, and Quantum Computation methods are used to unify previously separate 'arrows of time'. The 'direction' and 'dimension' of 'time' are found to be secondary information structures created by the 'processing' of the information carried by signals connecting 'clocks' together in networks. The 'problem of time' may be solved by identification of a fundamental 'irreversible' Quantum Arrow of Time and 'reversible' Classical Arrows of Time. These 'arrows' can used to map information flow through complex causal networks from the Big Bang to the Brain. Keywords; unification of the fundamental interactions of matter, consciousness, entangled states, time reversal, time travel, and FTL or superluminal signals

  18. Observation of the Decay {ital K}{sup +} {r_arrow} {pi}{sup +}{mu}{sup +}{mu}{sup {minus}}

    Energy Technology Data Exchange (ETDEWEB)

    Adler, S.; Atiya, M.S.; Chiang, I.; Frank, J.S.; Haggerty, J.S.; Kycia, T.F.; Li, K.K.; Littenberg, L.S.; Sambamurti, A.; Stevens, A.; Strand, R.C.; Witzig, C. [Brookhaven National Laboratory, Upton, New York 11973 (United States); Louis, W.C. [Medium Energy Physics Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545 (United States); Akerib, D.S.; Ardebili, M.; Convery, M.; Ito, M.M.; Marlow, D.R.; McPherson, R.; Meyers, P.D.; Selen, M.A.; Shoemaker, F.C.; Smith, A.J. [Joseph Henry Laboratories, Princeton University, Princeton, New Jersey 08544 (United States); Blackmore, E.W.; Bryman, D.A.; Felawka, L.; Konaka, A.; Kuno, Y.; Macdonald, J.A.; Numao, T.; Padley, P.; Poutissou, J.; Poutissou, R.; Roy, J.; Turcot, A.S. [TRIUMF, Vancouver, British Columbia, Canada, V6T 2A3 (CANADA); Kitching, P.; Nakano, T.; Rozon, M.; Soluk, R. [Centre for Subatomic Research, University of Alberta, Edmonton, Alberta, Canada, T6G 2N5 (CANADA)

    1997-12-01

    We have observed the rare decay K{sup +} {r_arrow} {pi}{sup +}{mu}{sup +}{mu}{sup {minus}} and measured the branching ratio {Gamma}(K{sup +} {r_arrow} {pi}{sup +}{mu}{sup +}{mu}{sup {minus}}) /{Gamma}(K{sup +} {r_arrow} all)=[5.0{plus_minus}0.4(stat){plus_minus} 0.7(syst){plus_minus}0.6(th)]{times}10{sup {minus}8}. We compare this result with predictions from chiral perturbation theory and estimates based on the decay K{sup +} {r_arrow} {pi}{sup +}e{sup +}e{sup {minus}}. {copyright} {ital 1997} {ital The American Physical Society}

  19. Radiology applications of financial accounting.

    Science.gov (United States)

    Leibenhaut, Mark H

    2005-03-01

    A basic knowledge of financial accounting can help radiologists analyze business opportunities and examine the potential impacts of new technology or predict the adverse consequences of new competitors entering their service area. The income statement, balance sheet, and cash flow statement are the three basic financial statements that document the current financial position of the radiology practice and allow managers to monitor the ongoing financial operations of the enterprise. Pro forma, or hypothetical, financial statements can be generated to predict the financial impact of specific business decisions or investments on the profitability of the practice. Sensitivity analysis, or what-if scenarios, can be performed to determine the potential impact of changing key revenue, investment, operating cost or financial assumptions. By viewing radiology as both a profession and a business, radiologists can optimize their use of scarce economic resources and maximize the return on their financial investments.

  20. Computational radiology for orthopaedic interventions

    CERN Document Server

    Li, Shuo

    2016-01-01

    This book provides a cohesive overview of the current technological advances in computational radiology, and their applications in orthopaedic interventions. Contributed by the leading researchers in the field, this volume covers not only basic computational radiology techniques such as statistical shape modeling, CT/MRI segmentation, augmented reality and micro-CT image processing, but also the applications of these techniques to various orthopaedic interventional tasks. Details about following important state-of-the-art development are featured: 3D preoperative planning and patient-specific instrumentation for surgical treatment of long-bone deformities, computer assisted diagnosis and planning of periacetabular osteotomy and femoroacetabular impingement, 2D-3D reconstruction-based planning of total hip arthroplasty, image fusion for  computer-assisted bone tumor surgery, intra-operative three-dimensional imaging in fracture treatment, augmented reality based orthopaedic interventions and education, medica...

  1. Radiologic findings of neonatal sepsis

    Energy Technology Data Exchange (ETDEWEB)

    Kim, Sam Soo; Han, Dae Hee; Choi, Guk Myeong; Jung, Hye Won [Seoul National Univ. College of Medicine, Seoul (Korea, Republic of); Yoon, Hye Kyung; Han, Bokyung Kim; Lee, Nam Yong [Sansung Medical Center, Seoul (Korea, Republic of)

    1997-06-01

    To review the simple radiographic and sonographic findings in infants with neonatal sepsis. We retrospectively analyzed simple chest and abdominal radiographs, and brain sonograms in 36 newborn infants (preterm : term=23 :13). With neonatal sepsis diagnosed by blood culture and clinical manifestations. Pulmonary parenchymal infiltrate excluding respiratory distress syndrome and pulmonary edema or atelectasis was found in 22 infants (61%). Paralytic ileus, hepatosplenomegaly, and necrotizing enterocolitis were present in 18(50%), 9(25%), and 1(3%) infants, respectively, while skeletal changes suggesting osteomyelitis were found in three. Brain sonography was performed in 29 infants and in four, abnormalities were seen ; these comprised three germinal matrix hemorrhages and one intraparenchymal hemorrhage. In six patients(17%) radiologic examinations revealed no abnormality. In patients with neonatal sepsis, pulmonary infiltrates and paralytic ileus were common abnormalities. Although these were nonspecific, radiologic findings may be used to supplement clinical and laboratory findings in diagnosing neonatal sepsis and planning its treatment.

  2. Radiology of the resurfaced hip

    Energy Technology Data Exchange (ETDEWEB)

    Rahman, Luthfur [The London Hip Unit, London (United Kingdom); Hall-Craggs, Margaret [University College London Hospital, London (United Kingdom); Muirhead-Allwood, Sarah K. [The London Hip Unit, London (United Kingdom); The Royal National Orthopaedic Hospital, Middlesex (United Kingdom)

    2011-07-15

    Hip resurfacing arthroplasty is an increasingly common procedure for osteoarthritis. Conventional radiographs are used routinely for follow-up assessment, however they only provide limited information on the radiological outcome. Various complications have been reported in the scientific literature although not all are fully understood. In an effort to investigate problematic or failing hip resurfacings, various radiological methods have been utilized. These methods can be used to help make a diagnosis and guide management. This paper aims to review and illustrate the radiographic findings in the form of radiography, computerized tomography (CT), magnetic resonance imaging (MRI), and ultrasound of both normal and abnormal findings in hip resurfacing arthroplasty. However, imaging around a metal prosthesis with CT and MRI is particularly challenging and therefore the potential techniques used to overcome this are discussed. (orig.)

  3. Measurement of the Neutral B Meson Lifetime using Partially Reconstructed Bo right arrow D (sup asterisk -) pi + Decays

    Science.gov (United States)

    Zito, M.

    2002-03-01

    The neutral B meson lifetime has been measured with the data collected by the BABAR detector at the PEP-II storage ring during the year 2000 for a total integrated luminosity of 20.3 fb to the minus 1 power. The B0 right arrow D(sup asterisk -)pi+ decays have been selected with a partial reconstruction method in which only the fast pion from the B0 decay and the slow pion from D(sup asterisk -) right arrow overline Do pi- are reconstructed. The B0 lifetime has been measured to be 1.510 + or - 0.040 + or - 0.038 ps with a sample of 6971 + or - 241 reconstructed signal events.

  4. Is the Hypothesis About a Low Entropy Initial State of the Universe Necessary for Explaining the Arrow of Time?

    CERN Document Server

    Goldstein, Sheldon; Zanghi, Nino

    2016-01-01

    According to statistical mechanics, micro-states of an isolated physical system (say, a gas in a box) at time $t_0$ in a given macro-state of less-than-maximal entropy typically evolve in such a way that the entropy at time $t$ increases with $|t-t_0|$ in both time directions. In order to account for the observed entropy increase in only one time direction, the thermodynamic arrow of time, one usually appeals to the hypothesis that the initial state of the universe was one of very low entropy. In certain recent models of cosmology, however, no hypothesis about the initial state of the universe is invoked. We discuss how the emergence of a thermodynamic arrow of time in such models can nevertheless be compatible with the above-mentioned consequence of statistical mechanics, appearances to the contrary notwithstanding.

  5. Otologic radiology with clinical correlations

    Energy Technology Data Exchange (ETDEWEB)

    Ruenes, R.; De la Cruz, A.

    1986-01-01

    This manual covers developments in the radiologic diagnosis of otologic problems. To demonstrate the appearance of each disorder comprehensively, a large number of radiographs are included, many of them annotated to highlight both diagnostic signs and the subtle aspects of normal pathologic anatomy. Contents: X-ray and Imaging Techniques and Anatomy. Congenital Malformations. Middle and External Ear Infections. Otosclerosis and Otospongiosis. Temporal Bone Fractures. The Facial Nerve. Tumors of the Temporal Bone and Skull Base. Tumors of the Cerebellopontine Angle. Cochlear Implants.

  6. Benign chondroblastoma - malignant radiological appearances

    Energy Technology Data Exchange (ETDEWEB)

    Schulze, K.; Treugut, H.; Mueller, G.E.

    1980-04-01

    The very rare benign chondroblastoma occasionally invades soft tissues and may grow beyond the epiphysis into the metaphysis. In the present case such a tumour did not show the typical radiological appearances, but presented malignant features both on plain films and on the angiogram. The importance of biopsy of tumours which cannot be identified with certainty must be stressed before radical surgery is carried out.

  7. Frontiers in European radiology 9

    Energy Technology Data Exchange (ETDEWEB)

    Baert, A.L. (ed.) (Leuven Univ. (Belgium)); Heuck, F.H.W. (ed.) (Katharinenhospital, Stuttgart (Germany))

    1993-01-01

    The twelve chapters of the book - which were not prepared for separate retrieval from the database - deal with recent enhancements in equipment or technique, or novel applications, of existing diagnostic medical radiology methods such as magnetic resonance angiography, magnetic resonance spectroscopy, magnetic resonance imaging, Doppler sonography, digital subtraction angiography, and non-invasive thermometry. Possible side effects of the methods covered are also discussed, as e.g. nephropathy induced by contrast media, or artifacts involved in MRI. (UWA). 182 figs., 26 tabs.

  8. Beetle and plant arrow poisons of the Ju|’hoan and Hai||om San peoples of Namibia (Insecta, Coleoptera, Chrysomelidae; Plantae, Anacardiaceae, Apocynaceae, Burseraceae)

    OpenAIRE

    2016-01-01

    Abstract The use of archery to hunt appears relatively late in human history. It is poorly understood but the application of poisons to arrows to increase lethality must have occurred shortly after developing bow hunting methods; these early multi-stage transitions represent cognitive shifts in human evolution. This paper is a synthesis of widely-scattered literature in anthropology, entomology, and chemistry, dealing with San (“Bushmen”) arrow poisons. The term San (or Khoisan) covers many i...

  9. Research of Broken Wire Rope Detection System Based on LabVIEW

    Directory of Open Access Journals (Sweden)

    Jing-ge Gao

    2014-04-01

    Full Text Available In this study, we introduce how to detect broken wires in steel rope based on wavelet transform and virtual instrument technology. By means of the powerful data analysis function of virtual instrument and wavelet transform, the singularity of wires can be found and it could help to improve ability of locating broken wires and determining breakage grade.

  10. Understanding Mechanisms of Radiological Contamination

    Energy Technology Data Exchange (ETDEWEB)

    Rick Demmer; John Drake; Ryan James, PhD

    2014-03-01

    Over the last 50 years, the study of radiological contamination and decontamination has expanded significantly. This paper addresses the mechanisms of radiological contamination that have been reported and then discusses which methods have recently been used during performance testing of several different decontamination technologies. About twenty years ago the Idaho Nuclear Technology Engineering Center (INTEC) at the INL began a search for decontamination processes which could minimize secondary waste. In order to test the effectiveness of these decontamination technologies, a new simulated contamination, termed SIMCON, was developed. SIMCON was designed to replicate the types of contamination found on stainless steel, spent fuel processing equipment. Ten years later, the INL began research into methods for simulating urban contamination resulting from a radiological dispersal device (RDD). This work was sponsored by the Defense Advanced Research Projects Agency (DARPA) and included the initial development an aqueous application of contaminant to substrate. Since 2007, research sponsored by the US Environmental Protection Agency (EPA) has advanced that effort and led to the development of a contamination method that simulates particulate fallout from an Improvised Nuclear Device (IND). The IND method diverges from previous efforts to create tenacious contamination by simulating a reproducible “loose” contamination. Examining these different types of contamination (and subsequent decontamination processes), which have included several different radionuclides and substrates, sheds light on contamination processes that occur throughout the nuclear industry and in the urban environment.

  11. Telemetry of Aerial Radiological Measurements

    Energy Technology Data Exchange (ETDEWEB)

    H. W. Clark, Jr.

    2002-10-01

    Telemetry has been added to National Nuclear Security Administration's (NNSA's) Aerial Measuring System (AMS) Incident Response aircraft to accelerate availability of aerial radiological mapping data. Rapid aerial radiological mapping is promptly performed by AMS Incident Response aircraft in the event of a major radiological dispersal. The AMS airplane flies the entire potentially affected area, plus a generous margin, to provide a quick look at the extent and severity of the event. The primary result of the AMS Incident Response over flight is a map of estimated exposure rate on the ground along the flight path. Formerly, it was necessary to wait for the airplane to land before the map could be seen. Now, while the flight is still in progress, data are relayed via satellite directly from the aircraft to an operations center, where they are displayed and disseminated. This permits more timely utilization of results by decision makers and redirection of the mission to optimize its value. The current telemetry capability can cover all of North America. Extension to a global capability is under consideration.

  12. Quality management systems in radiology

    Directory of Open Access Journals (Sweden)

    Geoffrey K. Korir

    2013-08-01

    Full Text Available Background: The use of X-ray imaging is ever increasing in proportion to the need for radiological services and technological capabilities. Quality management that includes patient radiation dose monitoring is fundamental to safety and quality improvement of radiological services.Objective: To assess the level of quality management systems in X-ray medical facilities in Kenya.Methods: Quality management inspection, quality control performance tests and patient radiation exposure were assessed in 54 representative X-ray medical facilities. Additionally, a survey of X-ray examination frequency was conducted in 140 hospitals across the country.Results: The overall findings placed the country’s X-ray imaging quality management systems at 61±3% out of a possible 100%. The most and the least quality assurance performance indicators were general radiography X-ray equipment quality control tests at 88±4%, and the interventional cardiology adult examinations below diagnostic reference level at 25±1%, respectively.Conclusions: The study used a systematic evidence-based approach for the assessment of national quality management systems in radiological practice in clinical application, technical conduct of the procedure, image quality criteria, and patient characteristics as part of the quality management programme.

  13. Radiologic evaluation of os odontoideum

    Energy Technology Data Exchange (ETDEWEB)

    Lee, Eun Ju; Chung, Tae Sub; Suh, Jung Ho; Kim, Dong Ik; Kim, Yong Soo; Park, Hyoung Chun; Oh, Soung Hoon [Yonsei University College of Medicine, Seoul (Korea, Republic of)

    1988-10-15

    We took an analysis on the clinical and radiologic findings of os odontoideum, which had been regarded as relatively uncommon disease, on 5 patients whom we have recently experienced. Our results were as follows: 1. Os odontoideums were incidentally discovered during the radiologic evaluation of traumatised 4 cases, who had been well being. Another one case of os odontoideum was associated with multiple epiphyseal dysplasia. 2. General radiologic findings of os odontoideum were a round or oval and hypoplastic ossicle separated from the base of odontoid process by wise gap. 3. Alanto-Axial instability was developed in 5 cases of os odontoideum by flexion and extension stress view of lateral cervical spine. 4. Flexion views of lateral cervical spine showed narrowing of anteroposterior diameter of spinal canal which were available at atlantoaxial level on 5 cases of os odontoidum. 5. CT myelogram and cervical myelogram showed anteriorly compressed dural sac and deformed spinal cord by body of axis at the atlanto-axial level.

  14. Takotsubo Cardiomyopathy (Broken-Heart Syndrome): A Short Review.

    Science.gov (United States)

    Potu, Kalyan Chakravarthy; Raizada, Amol; Gedela, Maheedhar; Stys, Adam

    2016-04-01

    Takotsubo cardiomyopathy, also called "broken heart" syndrome or apical ballooning syndrome, is a reversible cardiomyopathy characterized by left ventricular dysfunction and ballooning of the left ventricular apex on imaging during systole. It predominantly occurs in post-menopausal women and is commonly associated with emotional or physical stress. Patients commonly present with chest pain and electrocardiographic evidence of ST segment elevation or T-wave-mimicking acute coronary syndrome, but with an absence of angiographic evidence of obstructive coronary disease. The exact cause is unknown, but potential contributors include catecholamine excess and sympathetic nervous system hyperactivity. There is no consensus on pharmacological treatment of takotsubo cardiomyopathy. Based on the suspected pathophysiology of the disease, adrenergic blockade using beta-blocker therapy is employed. Near complete resolution of left ventricular wall motion dyskinesis occurs in the majority of takotsubo cardiomyopathy patients within a month. Although the prognosis is generally favorable, there are reports of complications during the acute phase, including cardiogenic shock, pulmonary edema, ventricular tachycardia, apical thrombus formation, and death. This review article will briefly discuss the epidemiology, etiology, clinical features, diagnostic evaluation, and treatment of this condition.

  15. Entanglement entropy in quantum spin chains with broken reflection symmetry

    CERN Document Server

    Kadar, Zoltan

    2010-01-01

    We investigate the entanglement entropy of a block of L sites in quasifree translation-invariant spin chains concentrating on the effect of reflection symmetry breaking. The majorana two-point functions corresponding to the Jordan-Wigner transformed fermionic modes are determined in the most general case; from these it follows that reflection symmetry in the ground state can only be broken if the model is quantum critical. The large L asymptotics of the entropy is calculated analytically for general gauge-invariant models, which has, until now, been done only for the reflection symmetric sector. Analytical results are also derived for certain non-gauge-invariant models, e.g. for the Ising model with Dzyaloshinskii-Moriya interaction. We also study numerically finite chains of length N with a non-reflection-symmetric Hamiltonian and report that the reflection symmetry of the entropy of the first L spins is violated but the reflection-symmetric Calabrese-Cardy formula is recovered asymptotically. Furthermore, f...

  16. Evidence of Broken Reciprocity in Cholesteric Liquid Crystals

    Science.gov (United States)

    Venkataraman, Nithya; Moreira, Michele; Taheri, Bahman; Palffy-Muhoray, Peter

    2007-03-01

    Reciprocity of scattering of a plane incident wave is predicated on bounded scattering media with symmetric and linear permittivity, conductivity and permeability. In chiral media, such as cholesteric liquid crystals, the dielectric tensor is asymmetric due the presence of odd powers of the wave vector resulting from nonlocality and broken inversion symmetry. Evidence of non-reciprocity has been found in optically active crystals by Bennet [1] and in stacks of cholesteric and nematic liquid crystal cells [2]. Here we present transmittance and reflectance data for cholesteric cells with different pitches having overlapping but distinct reflection bands. We relate our results to simple analytic descriptions of the materials properties and of propagating modes and assess them in light of the requirements for reciprocity. 1. P.J. Bennett, S. Dhanjal, Yu. P. Svirko and N. I. Zheludev, Opt. Lett. 21, 1955 (1996) 2. J. Hwang; M.H. Song; B. Park; S. Nishimura; T. Toyooka; J.W. Wu; Y. Takanishi; K. Ishikawa; H. Takezoe, Nat. Mat. 4, 383 (2005).

  17. Broken particle-hole symmetry in critical fluids

    Science.gov (United States)

    Goldstein, Raymond E.; Parola, Alberto

    1988-06-01

    The quantitative validity of asymptotic particle-hole symmetry in a fluid at its liquid-vapor critical point is determined by means of the exact mapping of the fluid Hamiltonian onto that of an effective Landau-Ginzburg-Wilson model studied first by Hubbard and Schofield. A particular three-particle correlation of a reference fluid is identified as that which controls the breaking of liquid-vapor symmetry, as manifested in a linear mixing of the pure Ising-like scaling fields and a singularity in the coexistence curve diameter. The inherent smallness of the mixing coefficient in a pair-potential fluid is shown to reflect the weak density dependence of the second moment of the two-particle direct correlation function of the reference system. It is further demonstrated that three-body interactions of the Axilrod-Teller-type enhance the broken particle-hole symmetry found in a purely pairwise-additive Hamiltonian, and detailed calculations give diameter anomaly amplitudes which vary linearly with the fluid polarizability, in quantitative agreement with recent experiments.

  18. Detection of a Misaligned Broken Pipe by Electromagnetic Interaction

    Science.gov (United States)

    Di Gregorio, Pietro Paolo; Frezza, Fabrizio; Mangini, Fabio; Ferrara, Vincenzo

    2016-04-01

    The study we are presenting concerns electromagnetic scattering of a plane wave due to the presence of a misaligned broken pipe buried in a half-space occupied by cement and by asphalt/ground, for civil-engineering applications. In order to simulate a realistic scenario, the pipe is supposed cylindrical and made of metallic or poly-vinyl chloride (PVC) material whose electromagnetic properties are known in the literature and dimensions are the most used in civil-engineering applications. We consider the longitudinal axis of the pipe running parallel to the air-cement interface. We suppose, after the break of the pipe, that the longitudinal axes of the two parts move on a plane parallel to the separation interface, in opposite directions. The study focuses on the electromagnetic response of the scattered electric field along a line above the interface of the media considering different distances between the longitudinal axis of the tubes in two cases: PVC and metallic material. To accomplish the study, a commercially available simulator based on the Finite Element Method (FEM) is adopted and a circularly-polarized plane wave impinging normally to the interface is considered. This kind of study could be useful for monitoring the status of buried pipes using ground penetrating radar (GPR) techniques in many applications of Civil Engineering without the need to intervene destructively in the structure. Acknowledgement This work is a contribution to COST Action TU1208 "Civil Engineering Applications of Ground Penetrating Radar" (www.GPRadar.eu, www.cost.eu).

  19. Broken R-parity, stop decays, and neutrino physics

    CERN Document Server

    Restrepo, D A; Valle, José W F; Restrepo, Diego; Porod, Werner; Valle, Jose W. F.

    2001-01-01

    We discuss the phenomenology of the lightest stop in models where R-parity is broken by bilinear superpotential terms. In this class of models we consider scenarios where the R-parity breaking two-body decay ~t_1->\\tau^+b competes with the leading three-body decays such as ~t_1->W^+b~\\chi^0_1. We demonstrate that the R-parity violating decay can be sizable and in some parts of the parameter space even the dominant one. Moreover we discuss the expectations for \\~t_1->\\mu^+b and ~t_1->e^+b. The recent results from solar and atmospheric neutrinos suggest that these are as important as the tau bottom mode. The \\~t_1->l^+b decays are of particular interest for hadron colliders, as they may allow a full mass reconstruction of the lighter stop. Moreover these decay modes allow cross checks on the neutrino mixing angle involved in the solar neutrino puzzle complementary to those possible using neutralino decays. For the so--called small mixing angle or SMA solution ~t_1->e^+b should be negligible, while for the large...

  20. Terminal deletion of the long arm of chromosome 3 [46,XX,del(3)(q27{r_arrow}qter)

    Energy Technology Data Exchange (ETDEWEB)

    Chitayat, D.; Babul, R.; Silver, M.M. [Univ. of Toronto, Ontario (Canada)] [and others

    1996-01-02

    We report on a terminal deletion of the long arm of chromosome 3[46,XX,del(3)(q27{r_arrow}qter)] in a female newborn infant who died 45 hours after delivery and had multiple congenital abnormalities including bilateral anophthalmia, congenital heart disease, and abnormal genitalia. The findings are compared to those of four previously reported cases with terminal de (3q). 8 refs., 4 figs., 1 tab.

  1. Review of neon-like and nickel-like ions lasing on the J = 0 {r_arrow} 1 line using the prepulse and multiple pulse techniques

    Energy Technology Data Exchange (ETDEWEB)

    Nilsen, J.; Moreno, J.C.; Da Silva, L.B.; Barbee, T.W. Jr. [Lawrence Livermore National Lab., CA (United States); Li, Y.; Lu, P.; Fill, E.E. [Max-Planck-Inst. fuer Quantenoptik, Garching (Germany); Fiedorowicz, H.; Bartnik, A. [Military Univ. of Technology, Warsaw (Poland). Inst. of Optoelectronics

    1995-11-01

    The authors discuss the use of a prepulse technique to achieve lasing in low-Z neon-like ions on the 3p {r_arrow} 3s(J = 0 {r_arrow} 1) transition. Lasing has now been observed on this transitions for neon-like ions from chlorine to selenium with wavelengths ranging from 528 {angstrom} to 182 {angstrom}. For the germanium targets they present two dimensional space resolves images of the laser output with magnification of ten. Using a gas puff target as an alternative to the prepulse technique, they observe lasing at 469 {angstrom} in neon-like argon. Using a series of 100 ps pulses 400 ps apart to illuminate germanium and selenium plasmas they present results which now show the 3p {r_arrow} 3s(J = 0 {r_arrow} 1) transition to dominate the other laser lines even for selenium. Applying the multiple pulse technique to nickel-like ions they observed lasing at 79 {angstrom} on the 4d {r_arrow} 4p(J = 0 {r_arrow} 1) transition in nickel-like neodymium (Z = 60) when a series of 100--150 ps pulses which are 400--500 ps apart are used to illuminate slab targets of neodymium. To maximize the laser output for neodymium they combine the advantages of coupling two slab targets, using the traveling wave geometry, and curving the target surface.

  2. Contributions to the Dart versus Arrow Debate: New Data from Holocene Projectile Points from Southeastern and Southern Brazil

    Directory of Open Access Journals (Sweden)

    Mercedes Okumura

    2015-12-01

    Full Text Available Lithic bifacial points are very common in the southern and southeastern regions of the Brazilian territory. Dated from Early to Late Holocene, these artifacts have not been studied in terms of their propulsion system. Given the characteristics of the bow and arrow compared to the atlatl and dart, there are important differences in the size and weight of arrowheads and dart points. Applying the techniques proposed by Shott (1997, Bradbury (1997, Fenenga (1953, Hughes (1998, and Hildebrandt and King (2012 to specimens recovered from eight sites dating from the early to the late Holocene, this work aims to present preliminary results to better understand the potential presence of darts and arrows in southeastern and southern Brazil. There was a variation in the results according to the application of different techniques. At least one set of points, dated from the Early Holocene, presented quite a high proportion of specimens classified as arrows, indicating the presence of points that could be used as arrowheads.

  3. Observation of the Decay {ital K}{sup +} {r_arrow} {pi}{sup +}{gamma}{gamma}

    Energy Technology Data Exchange (ETDEWEB)

    Kitching, P.; Nakano, T.; Rozon, M.; Soluk, R. [Centre for Subatomic Research, University of Alberta, Edmonton, Alberta, T6G 2N5 (CANADA); Adler, S.; Atiya, M.S.; Chiang, I.; Frank, J.S.; Haggerty, J.S.; Kycia, T.F.; Li, K.K.; Littenberg, L.S.; Sambamurti, A.; Stevens, A.; Strand, R.C.; Witzig, C. [Brookhaven National Laboratory, Upton, New York 11973 (United States); Louis, W.C. [Medium Energy Physics Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545 (United States); Akerib, D.S.; Ardebili, M.; Convery, M.; Ito, M.M.; Marlow, D.R.; McPherson, R.A.; Meyers, P.D.; Selen, M.A.; Shoemaker, F.C.; Smith, A.J. [Joseph Henry Laboratories, Princeton University, Princeton, New Jersey 08544 (United States); Blackmore, E.W.; Bryman, D.A.; Felawka, L.; Konaka, A.; Kuno, Y.; Macdonald, J.A.; Numao, T.; Padley, P.; Poutissou, J.; Poutissou, R.; Roy, J.; Turcot, A.S. [TRIUMF, Vancouver, British Columbia, V6T 2A3 (CANADA)

    1997-11-01

    The first observation of the decay K{sup +}{r_arrow}{pi}{sup +}{gamma}{gamma} is reported. A total of 31 events was observed with an estimated background of 5.1{plus_minus}3.3 events in the {pi}{sup +} momentum range from 100 to 180 MeV/{ital c}. The corresponding partial branching ratio, B(K{sup +}{r_arrow}{pi}{sup +}{gamma}{gamma} ,100 MeV/c{lt}P{sub {pi}{sup +} }{lt}180 MeV/c) , is [6.0{plus_minus}1.5(stat){plus_minus}0.7 (syst)]{times}10{sup {minus}7} . No K{sup +}{r_arrow}{pi}{sup +}{gamma}{gamma} decay was observed in the {pi}{sup +} momentum region greater than 215 MeV/{ital c}. The observed {pi}{sup +} momentum spectrum is compared with the predictions of chiral perturbation theory. {copyright} {ital 1997} {ital The American Physical Society}

  4. Symmetry and the Arrow of Time in Theoretical Black Hole Astrophysics

    Directory of Open Access Journals (Sweden)

    David Garofalo

    2015-01-01

    Full Text Available While the basic laws of physics seem time-reversal invariant, our understanding of the apparent irreversibility of the macroscopic world is well grounded in the notion of entropy. Because astrophysics deals with the largest structures in the Universe, one expects evidence there for the most pronounced entropic arrow of time. However, in recent theoretical astrophysics work it appears possible to identify constructs with time-reversal symmetry, which is puzzling in the large-scale realm especially because it involves the engines of powerful outflows in active galactic nuclei which deal with macroscopic constituents such as accretion disks, magnetic fields, and black holes. Nonetheless, the underlying theoretical structure from which this accreting black hole framework emerges displays a time-symmetric harmonic behavior, a feature reminiscent of basic and simple laws of physics. While we may expect such behavior for classical black holes due to their simplicity, manifestations of such symmetry on the scale of galaxies, instead, surprise. In fact, we identify a parallel between the astrophysical tug-of-war between accretion disks and jets in this model and the time symmetry-breaking of a simple overdamped harmonic oscillator. The validity of these theoretical ideas in combination with this unexpected parallel suggests that black holes are more influential in astrophysics than currently recognized and that black hole astrophysics is a more fundamental discipline.

  5. Stochasticity, decoherence and an arrow of time from the discretization of time?

    Indian Academy of Sciences (India)

    M C Valsakumar

    2005-04-01

    Certain intriguing consequences of the discreteness of time on the time evolution of dynamical systems are discussed. In the discrete-time classical mechanics proposed here, there is an arrow of time that follows from the fact that the replacement of the time derivative by the backward difference operator alone can preserve the non-negativity of the phase space density. It is seen that, even for free particles, all the degrees of freedom are correlated in principle. The forward evolution of functions of phase space variables by a finite number of time steps, in this discrete-time mechanics, depends on the entire continuous-time history in the interval [0, ∞]. In this sense, discrete time evolution is non-local in time from a continuous-time point of view. A corresponding quantum mechanical treatment is possible via the density matrix approach. The interference between non-degenerate quantum mechanical states decays exponentially. This decoherence is present, in principle, for all systems; however, it is of practical importance only in macroscopic systems, or in processes involving large energy changes.

  6. Supersonic Aerodynamic Design Improvements of an Arrow-Wing HSCT Configuration Using Nonlinear Point Design Methods

    Science.gov (United States)

    Unger, Eric R.; Hager, James O.; Agrawal, Shreekant

    1999-01-01

    This paper is a discussion of the supersonic nonlinear point design optimization efforts at McDonnell Douglas Aerospace under the High-Speed Research (HSR) program. The baseline for these optimization efforts has been the M2.4-7A configuration which represents an arrow-wing technology for the High-Speed Civil Transport (HSCT). Optimization work on this configuration began in early 1994 and continued into 1996. Initial work focused on optimization of the wing camber and twist on a wing/body configuration and reductions of 3.5 drag counts (Euler) were realized. The next phase of the optimization effort included fuselage camber along with the wing and a drag reduction of 5.0 counts was achieved. Including the effects of the nacelles and diverters into the optimization problem became the next focus where a reduction of 6.6 counts (Euler W/B/N/D) was eventually realized. The final two phases of the effort included a large set of constraints designed to make the final optimized configuration more realistic and they were successful albeit with a loss of performance.

  7. Threshold responses of Blackside Dace (Chrosomus cumberlandensis) and Kentucky Arrow Darter (Etheostoma spilotum) to stream conductivity

    Science.gov (United States)

    Hitt, Nathaniel P.; Floyd, Michael; Compton, Michael; McDonald, Kenneth

    2016-01-01

    Chrosomus cumberlandensis (Blackside Dace [BSD]) and Etheostoma spilotum (Kentucky Arrow Darter [KAD]) are fish species of conservation concern due to their fragmented distributions, their low population sizes, and threats from anthropogenic stressors in the southeastern United States. We evaluated the relationship between fish abundance and stream conductivity, an index of environmental quality and potential physiological stressor. We modeled occurrence and abundance of KAD in the upper Kentucky River basin (208 samples) and BSD in the upper Cumberland River basin (294 samples) for sites sampled between 2003 and 2013. Segmented regression indicated a conductivity change-point for BSD abundance at 343 μS/cm (95% CI: 123–563 μS/cm) and for KAD abundance at 261 μS/cm (95% CI: 151–370 μS/cm). In both cases, abundances were negligible above estimated conductivity change-points. Post-hoc randomizations accounted for variance in estimated change points due to unequal sample sizes across the conductivity gradients. Boosted regression-tree analysis indicated stronger effects of conductivity than other natural and anthropogenic factors known to influence stream fishes. Boosted regression trees further indicated threshold responses of BSD and KAD occurrence to conductivity gradients in support of segmented regression results. We suggest that the observed conductivity relationship may indicate energetic limitations for insectivorous fishes due to changes in benthic macroinvertebrate community composition.

  8. Study of advanced composite structural design concepts for an arrow wing supersonic cruise configuration, task 3

    Science.gov (United States)

    1978-01-01

    A structural design study was conducted to assess the relative merits of structural concepts using advanced composite materials for an advanced supersonic aircraft cruising at Mach 2.7. The configuration and structural arrangement developed during Task I and II of the study, was used as the baseline configuration. Allowable stresses and strains were established for boron and advanced graphite fibers based on projected fiber properties available in the next decade. Structural concepts were designed and analyzed using graphite polyimide and boron polyimide, applied to stiffened panels and conventional sandwich panels. The conventional sandwich panels were selected as the structural concept to be used on the wing structure. The upper and lower surface panels of the Task I arrow wing were redesigned using high-strength graphite polyimide sandwich panels over the titanium spars and ribs. The ATLAS computer system was used as the basis for stress analysis and resizing the surface panels using the loads from the Task II study, without adjustment for change in aeroelastic deformation. The flutter analysis indicated a decrease in the flutter speed compared to the baseline titanium wing design. The flutter analysis indicated a decrease in the flutter speed compared to the baseline titanium wing design. The flutter speed was increased to that of the titanium wing, with a weight penalty less than that of the metallic airplane.

  9. Nucleating emergency radiology specialization in India.

    Science.gov (United States)

    Agrawal, Anjali; Khandelwal, Niranjan

    2016-04-01

    Emergency radiology is being recognized as an important and distinct specialty of radiology which merits utmost attention of educators, radiology program curricula committees, and radiology practices in India. Providing an accurate but timely diagnosis requires a skilled judgement and a strong process framework, particularly in acute trauma setting or a life-threatening acute illness. However, due to a shortage of radiologists in India and lack of awareness and suitable opportunities, there has been no concerted movement towards emergency radiology subspecialty training or dedicated emergency radiology positions. It was with these gaps in mind that the Society for Emergency Radiology was envisioned in 2012 and formulated in 2013. The proposed role of the Society for Emergency Radiology is to identify deficiencies in the field, namely, lack of adequate exposure, lack of mentorship by experienced emergency radiologists, lack of suitable opportunities for emergency radiologists; establish standards of practice; and promote education and implementation research to bridge the gaps. Through collaboration with other societies and partnership with the journal Emergency Radiology, the Society for Emergency Radiology hopes to promote a free exchange of ideas, protocols, and multi-institutional trials across continents.

  10. The Corolla Polynomial for Spontaneously Broken Gauge Theories

    Science.gov (United States)

    Prinz, David

    2016-09-01

    In Kreimer and Yeats (Electr. J. Comb. 41-41, 2013), Kreimer et al. (Annals Phys. 336, 180-222, 2013) and Sars (2015) the Corolla Polynomial C ({Γ }) in C [a_{h1}, ldots , a_{h_{ \\vert {Γ }^{[1/2]} \\vert }}] was introduced as a graph polynomial in half-edge variables {ah}_{h in {Γ }^{[1/2]}} over a 3-regular scalar quantum field theory (QFT) Feynman graph Γ. It allows for a covariant quantization of pure Yang-Mills theory without the need for introducing ghost fields, clarifies the relation between quantum gauge theory and scalar QFT with cubic interaction and translates back the problem of renormalizing quantum gauge theory to the problem of renormalizing scalar QFT with cubic interaction (which is super renormalizable in 4 dimensions of spacetime). Furthermore, it is, as we believe, useful for computer calculations. In Prinz (2015) on which this paper is based the formulation of Kreimer and Yeats (Electr. J. Comb. 41-41, 2013), Kreimer et al. (Annals Phys. 336, 180-222, 2013) and Sars (2015) gets slightly altered in a fashion specialized in the case of the Feynman gauge. It is then formulated as a graph polynomial C ({Γ } ) in C [a_{h_{1 ± }}, ldots , a_{h_{ \\vert {Γ }^{[1/2]} \\vert } {h}_{± }}, b_{h1}, ldots , b_{h_{ \\vert {Γ }^{[1/2]} \\vert }}] in three different types of half-edge variables {a_{h+} , a_{h-} , bh}_{h in {Γ }^{[1/2]}} . This formulation is also suitable for the generalization to the case of spontaneously broken gauge theories (in particular all bosons from the Standard Model), as was first worked out in Prinz (2015) and gets reviewed here.

  11. [European curriculum for further education in radiology].

    Science.gov (United States)

    Ertl-Wagner, B

    2014-11-01

    The European training curriculum for radiology of the European Society of Radiology (ESR) aims to harmonize training in radiology in Europe. Levels I and II constitute the centerpiece of the curriculum. The ESR recommends a 5-year training period in radiology with 3 years of level I and 2 years of level II training. The undergraduate (U) level curriculum is conceived as a basis for teaching radiology in medical schools and consists of a modality-oriented U1 level and an organ-based U2 level. Level III curricula provide contents for subspecialty and fellowship training after board certification in radiology. The curricular contents of all parts of the European Training Curriculum are divided into the sections knowledge, skills as well as competences and attitudes. The European training curriculum is meant to be a recommendation and a basis for the development of national curricula, but is not meant to replace existing national regulations.

  12. [Interventional radiology: current problems and new directions].

    Science.gov (United States)

    Santos Martín, E; Crespo Vallejo, E

    2014-01-01

    In recent years, vascular and interventional radiology has become one of the fastest growing diagnostic and therapeutic specialties. This growth has been based on a fundamental concept: performing minimally invasive procedures under imaging guidance. This attractive combination has led to the interest of professionals from other clinical specialties outside radiology in performing this type of intervention. The future of vascular and interventional radiology, although uncertain, must be linked to clinical practice and multidisciplinary teamwork.

  13. Emergency department musculoskeletal radiological requests abuse and patients attitude toward radiological exposure in Saudi Arabia

    Directory of Open Access Journals (Sweden)

    T. Montaser*

    2013-12-01

    Conclusion: People in Saudi Arabia expose to huge amount of radiological hazardous with a common believe that radiology is essential for diagnosis all musculoskeletal injuries. Wealthy medical system does not always lead to competent practice.

  14. Novel indices for broken rotor bars fault diagnosis in induction motors using wavelet transform

    Science.gov (United States)

    Ebrahimi, Bashir Mahdi; Faiz, Jawad; Lotfi-fard, S.; Pillay, P.

    2012-07-01

    This paper introduces novel indices for broken rotor bars diagnosis in three-phase induction motors based on wavelet coefficients of stator current in a specific frequency band. These indices enable to diagnose occurrence and determine number of broken bars in different loads precisely. Besides thanks to the suitability of wavelet transform in transient conditions, it is possible to detect the fault during the start-up of the motor. This is important in the case of start-up of large induction motors with long starting time and also motors with frequent start-up. Furthermore, broken rotor bars in induction motor are detected using spectra analysis of the stator current. It is also shown that rise of number of broken bars and load levels increases amplitude of the particular side-band components of the stator currents in the faulty case. An induction motor with 1, 2, 3 and 4 broken bars at the rated load and the motor with 4 broken bars at no-load, 33%, 66%, 100% and 133% rated load are investigated. Time stepping finite element method is used for modeling broken rotor bars faults in induction motors. In this modeling, effects of the stator winding distribution, stator and rotor slots, geometrical and physical characteristics of different parts of the motor and non-linearity of the core materials are taken into account. The simulation results are are verified by the experimental results.

  15. Corn replacement by broken rice in meat-type quail diets

    Directory of Open Access Journals (Sweden)

    TMB Filgueira

    2014-12-01

    Full Text Available An experiment was conducted to evaluate the effects of broken rice inclusion as substitute for corn in the diet on the performance, carcass yield, and economic viability of meat-type quails between 7 and 49 days of age. A number of 288 quails was distributed according to a completely randomized design into six treatments with six replicates of eight birds each. Treatments consisted of increasing levels of broken rice (0, 20, 40, 60, 80 and 100% in replacement of corn. Increasing levels of corn substitution by broken rice in the diet of 7- to 49-day-old meat-type quails did not affect feed intake, weight gain or feed conversion ratio (p>0.05. Relative to carcass traits, the inclusion of broken rice in the diets did not influence (p>0.05 dressing percentage or breast, leg (thigh+drumstick, liver, and gizzard yields. Moreover, feed cost per kilogram of live weight gain, cost index, and economic efficiency index were not influenced by the replacement of corn by broken rice in the diets. The performance, carcass traits and economic viability of broilers fed the different levels of broken rice inclusion were not different from the control group (p>0.05. These results indicate the economic viability of total replacement of corn by broken rice in the feeding of meat-type quails.

  16. Radiology.

    Science.gov (United States)

    Patel, Ketan; Wallace, Roxanne; Busconi, Brian D

    2011-04-01

    Hip and groin pain are a common complaint among athletes of all ages, and may result from an acute injury or from chronic, repetitive trauma. Hip injuries can be intraarticular, extraarticular, or both. Labral abnormalities may occur in asymptomatic patients as well as in those with incapacitating symptoms and signs. Athletic hip injury leading to disabling intraarticular hip pain most commonly involves labral tear. The extraarticular causes are usually the result of overuse activity, leading to inflammation, tendonitis, or bursitis. In clinical practice, the term athletic pubalgia is used to describe exertional pubic or groin pain.

  17. Ebola virus disease: radiology preparedness.

    Science.gov (United States)

    Bluemke, David A; Meltzer, Carolyn C

    2015-02-01

    At present, there is a major emphasis on Ebola virus disease (EVD) preparedness training at medical facilities throughout the United States. Failure to have proper EVD procedures in place was cited as a major reason for infection of medical personnel in the United States. Medical imaging does not provide diagnosis of EVD, but patient assessment in the emergency department and treatment isolation care unit is likely to require imaging services. The purpose of this article is to present an overview of relevant aspects of EVD disease and preparedness relevant to the radiologic community.

  18. Radiology of total hip replacement

    Energy Technology Data Exchange (ETDEWEB)

    Griffiths, H.J.; Lovelock, J.E.; McCollister Evarts, C.; Geyer, D.

    1984-06-01

    The radiology of total hip replacement (THR) and its complications is reviewed in conjunction with a long-term follow-up study on 402 patients with 501 prostheses. The indications, contraindications, biomechanics, and operative management of these patients is discussed. Clinical complications such as deep vein thrombosis, pulmonary embolism, and hemorrhage are mentioned. Postoperative infections including granulomatous pseudotumors, dislocations and fractures, true loosening of the prosthesis, and heterotopic bone formation (HBF) are discussed and illustrated. The importance of differentiating the lucent line from true loosening is stressed. Mechanical and other clinical complications which are largely ignored by radiologists are also discussed. The uses of arthrography and bone scanning are included.

  19. Nuclear and radiological Security: Introduction.

    Energy Technology Data Exchange (ETDEWEB)

    Miller, James Christopher [Los Alamos National Lab. (LANL), Los Alamos, NM (United States)

    2016-02-24

    Nuclear security includes the prevention and detection of, and response to, theft, sabotage, unauthorized access, illegal transfer, or other malicious acts involving nuclear or other radioactive substances or their associated facilities. The presentation begins by discussing the concept and its importance, then moves on to consider threats--insider threat, sabotage, diversion of materials--with considerable emphasis on the former. The intrusion at Pelindaba, South Africa, is described as a case study. The distinction between nuclear security and security of radiological and portable sources is clarified, and the international legal framework is touched upon. The paper concludes by discussing the responsibilities of the various entities involved in nuclear security.

  20. Radiological diagnosis of Brodie's abscess.

    Science.gov (United States)

    Kowalewski, Michał; Swiatkowski, Jan; Michałowska, Ilona; Swiecicka, Dorota

    2002-12-30

    Background. Brodie's abscess is a kind of rare subacute or chronic osteitis. It is probably caused by mistreated or non-treated osteitis, or by bacteria of low virulence. Material and methods. In the Orthopedic and Traumatology Clinic of our medical school 5 patients were diagnosed with Brodie's obsecess between 1999 and 2002. all the patients had conventional x-rays, while one also had CT and MRI. Results and conclusions. The typical x-ray image shows an osteolytic lesion with sclerotic margin in the diametophysis. Each of the 5 patients had surgery. In 4 cases the histopatological results confirmed the radiological diagnosis. In one case fibrous dysplasia was found.

  1. The role of radiology in Campylobacter enterocolitis

    Energy Technology Data Exchange (ETDEWEB)

    Demaerel, P.; Ponette, E.; Baert, A.L. (Leuven Univ. (Belgium). Dept. of Radiology); Lacquet, F.; Verbist, L. (Leuven Univ. (Belgium). Dept. of Microbiology); Rutgeerts, A.L. (Leuven Univ. (Belgium). Dept. of Internal Medicine)

    1989-05-01

    A series of 18 patients with diarrhoea and positive stool cultures for Campylobacter jejuni is presented. The most important radiological features were thickening of ileal mucosal folds, of interhaustral indentations and of the ileocaecal valve, lymphoid hyperplasia and microulcerations. Radiology, as well as endoscopy, are both non-specific in Campylobacter jejuni enterocolitis. The importance of radiology is to exclude more typical features of other causes of inflammatory bowel diseases. Moreover, before the result of the stool culture is available, the radiological features should suggest the suspicion of an acute infectious enterocolitis by Campylobacter jejuni as possible diagnosis. (orig.).

  2. Implementation of a Radiological Safety Coach program

    Energy Technology Data Exchange (ETDEWEB)

    Konzen, K.K. [Safe Sites of Colorado, Golden, CO (United States). Rocky Flats Environmental Technology Site; Langsted, J.M. [M.H. Chew and Associates, Golden, CO (United States)

    1998-02-01

    The Safe Sites of Colorado Radiological Safety program has implemented a Safety Coach position, responsible for mentoring workers and line management by providing effective on-the-job radiological skills training and explanation of the rational for radiological safety requirements. This position is significantly different from a traditional classroom instructor or a facility health physicist, and provides workers with a level of radiological safety guidance not routinely provided by typical training programs. Implementation of this position presents a challenge in providing effective instruction, requiring rapport with the radiological worker not typically developed in the routine radiological training environment. The value of this unique training is discussed in perspective with cost-savings through better radiological control. Measures of success were developed to quantify program performance and providing a realistic picture of the benefits of providing one-on-one or small group training. This paper provides a description of the unique features of the program, measures of success for the program, a formula for implementing this program at other facilities, and a strong argument for the success (or failure) of the program in a time of increased radiological safety emphasis and reduced radiological safety budgets.

  3. Characteristics of Scour and Deposition in Front of Breakwaters Under Irregular Broken Clapotis

    Institute of Scientific and Technical Information of China (English)

    高学平; 张亚; 李昌良

    2004-01-01

    First the scour and deposition patterns of the sandy seabed in front of a vertical breakwater under the action of irregular broken clapotis are investigated experimentally and classified into five types: scour type Ⅰ , scour type Ⅱ , scour typeⅢ, deposition type Ⅰ , and deposition type Ⅱ . Secondly, the processes of formation of scour and deposition patterns are probed in comparison with those induced by regular broken clapotis and standing waves. Thirdly, the criteria for distinguishing scour and deposition patterns under irregular broken clapotis are presented.

  4. Evidence of K{sup +} {r_arrow} {pi}{sup +}{nu}{anti {nu}}: The BNL E787 1995 result (How did we get here)

    Energy Technology Data Exchange (ETDEWEB)

    Chiang, I.H.; E787 Collaboration

    1998-02-01

    The kaon was studied very thoroughly since its discovery some 50 years ago. In the study of charged kaon branching ratios, it was noticed that K{sup +} {r_arrow} {pi}{sup 0}e{sup +}{nu}{sub e} is allowed while K{sup +} {r_arrow} {pi}{sup +}{nu}{anti {nu}} is not. The latter was then empirically classified as a forbidden decay, leading to the so called strangeness changing current rule. The decay K{sup +} {r_arrow} {pi}{sup 0}e{sup +}{nu}{sub e} is mediated by the strangeness changing charged current and its branching ratio is 4.8%. By contrast K{sup +} {r_arrow} {pi}{sup +}{nu}{anti {nu}} is a strangeness changing neutral current, which is forbidden. In 1970, the GIM model was introduced to explain this effect and in 1974, Gaillard and Lee calculated the K{sup +} {r_arrow} {pi}{sup +}{nu}{anti {nu}} branching ratio to be on the order of 10{sup {minus}10}. In the current theory, the K{sup +} {r_arrow} {pi}{sup +}{nu}{anti {nu}} is mediated by a Flavor Changing Neutral Current (FCNC) in which the cancellation of the three quark generations should be complete down to second order except for the difference in the quark masses. The top quark is much heavier than the charm and up quarks, so that the cancellation is not complete. In other words, this decay is more dependent on the top sector. The measurement of K{sup +} {r_arrow}{pi}{sup +}{nu}{anti {nu}} branching ratio measures the modulus of the V{sub td} element of the CKM Matrix. The 1995 results of E787 were published in 1997. This report is focused on how the author achieved the goal of detecting events with such as small branching ratio.

  5. Bony sequestrum: A radiologic review

    Energy Technology Data Exchange (ETDEWEB)

    Jennin, Felicie; Bousson, Valerie; Parlier, Caroline; Jomaah, Nabil; Khanine, Vanessa; Laredo, Jean-Denis [Lariboisiere Hospital, Department of Radiology, Paris (France)

    2011-08-15

    According to a pathological definition, a bony sequestrum is defined as a piece of devitalized bone that has been separated from the surrounding bone during the process of necrosis. However, the radiological definition of a sequestrum is different and refers to an image of calcification visible within a lucent lesion, completely separated from the surrounding bone, without referring to the vascular status and histological nature of the calcified tissue. The term ''button sequestrum'' has been used in calvarial lesions. The prototype conditions that may present with a bony sequestrum are osteomyelitis and skeletal tuberculosis. Other conditions such as radiation necrosis, eosinophilic granuloma, metastatic carcinoma, primary lymphoma of bone, aggressive fibrous tumors may also manifest as osteolytic lesions containing a sequestrum. In addition, some primary bone tumors produce a matrix that may mineralize and sometimes simulate a bone sequestrum. These include osteoid tumors (osteoid osteoma, osteoblastoma), cartilaginous tumors (chondroma and chondroblastoma), lipomatous tumors (lipoma), and benign fibrous tumors (fibromyxoma, myxoma, and desmoplastic fibroma). Therefore, various conditions may present at imaging as a small area of osteolysis containing central calcifications. However, a careful analysis of the sequestrum as well as the associated clinical and radiological findings often enables to point toward a limited number of conditions. (orig.)

  6. Search for anomalous WW/WZ {r_arrow} e{nu}jj production at D0; Busqueda de produccion anomala WW/WZ {r_arrow}e{nu}jj en D-Zero

    Energy Technology Data Exchange (ETDEWEB)

    Hernandez, A.S.

    1997-02-01

    A search for anomalous WW and WZ production in p{anti p} collisions at {radical}s = 1.8 TeV using the D0 detector at Fermilab is presented. With a data sample of p{anti p} {r_arrow} e{nu}jjX events corresponding to an integrated luminosity of 76.5 {+-} 4.1pb{sup {minus}1}. 399 candidate events were identified, from which 387.1 {+-} 39.8 events were estimated to be background. No deviations from the Standard Model were seen, which predicts 16.2 {+-} 2.7 events. The 95% CL limit on the cross section {sigma}(p{anti p} {r_arrow} W{sup +}W{sup {minus}}X) was calculated to be 93.8 pb. Limits on the CP-conserving anomalous WW{sub {gamma}} and WWZ coupling parameters were obtained from a binned likelihood fit to the transverse momentum spectrum of the W boson. Assuming that the WW{sub {gamma}} and WWZ coupling parameters are equal, the 95% CL limits on the CP-conserving couplings are {minus}0.56 < {Delta}{kappa} < 0.75 (with {lambda} = 0) and {minus}0.42 < {lambda} < 0.44 (with {Delta}{kappa} = 0), for a form factor scale {Lambda}{sub FF} = 1.5 TeV. Limits on other assumptions are also reported. These results were combined with the previous D0 WW, WZ {r_arrow} e{nu}jj published results (13.7 {+-} 0.7 pb{sup {minus}1}), and the limits on the anomalous coupling parameters were set to {minus}0.44 < {Delta}{kappa} < 0.60 (with {lambda} = 0) and {minus}0.34 < {lambda} 0.37 (with {Delta}{kappa} = 0), for a form factor scale {Lambda}{sub FF} = 2.0 TeV.

  7. New trends in radiology workstation design

    Science.gov (United States)

    Moise, Adrian; Atkins, M. Stella

    2002-05-01

    In the radiology workstation design, the race for adding more features is now morphing into an iterative user centric design with the focus on ergonomics and usability. The extent of the list of features for the radiology workstation used to be one of the most significant factors for a Picture Archiving and Communication System (PACS) vendor's ability to sell the radiology workstation. Not anymore is now very much the same between the major players in the PACS market. How these features work together distinguishes different radiology workstations. Integration (with the PACS/Radiology Information System (RIS) systems, with the 3D tool, Reporting Tool etc.), usability (user specific preferences, advanced display protocols, smart activation of tools etc.) and efficiency (what is the output a radiologist can generate with the workstation) are now core factors for selecting a workstation. This paper discusses these new trends in radiology workstation design. We demonstrate the importance of the interaction between the PACS vendor (software engineers) and the customer (radiologists) during the radiology workstation design. We focus on iterative aspects of the workstation development, such as the presentation of early prototypes to as many representative users as possible during the software development cycle and present the results of a survey of 8 radiologists on designing a radiology workstation.

  8. Nevada Test Site Radiological Control Manual

    Energy Technology Data Exchange (ETDEWEB)

    Radiological Control Managers' Council - Nevada Test Site

    2009-10-01

    This document supersedes DOE/NV/11718--079, “NV/YMP Radiological Control Manual,” Revision 5 issued in November 2004. Brief Description of Revision: A complete revision to reflect the recent changes in compliance requirements with 10 CFR 835, and for use as a reference document for Tenant Organization Radiological Protection Programs.

  9. Curricular Guidelines for Dental Auxiliary Radiology.

    Science.gov (United States)

    Journal of Dental Education, 1981

    1981-01-01

    AADS curricular guidelines suggest objectives for these areas of dental auxiliary radiology: physical principles of X-radiation in dentistry, related radiobiological concepts, principles of radiologic health, radiographic technique, x-ray films and intensifying screens, factors contributing to film quality, darkroom, and normal variations in…

  10. Radiology Aide. Instructor Key [and] Student Manual.

    Science.gov (United States)

    Hartwein, Jon; Dunham, John

    This manual can be used independently by students in secondary health occupations programs or by persons receiving on-the-job training in a radiology department. The manual includes an instructor's key that provides answers to the activity sheets and unit evaluations. The manual consists of the following five units: (1) orientation to radiology;…

  11. Radiological health aspects of uranium milling

    Energy Technology Data Exchange (ETDEWEB)

    Fisher, D.R.; Stoetzel, G.A.

    1983-05-01

    This report describes the operation of conventional and unconventional uranium milling processes, the potential for occupational exposure to ionizing radiation at the mill, methods for radiological safety, methods of evaluating occupational radiation exposures, and current government regulations for protecting workers and ensuring that standards for radiation protection are adhered to. In addition, a survey of current radiological health practices is summarized.

  12. 76 FR 49458 - TRICARE; Hospital Outpatient Radiology Discretionary Appeal Adjustments

    Science.gov (United States)

    2011-08-10

    ... of the Secretary TRICARE; Hospital Outpatient Radiology Discretionary Appeal Adjustments AGENCY... hospitals of an opportunity for net adjusted payments for radiology services for which TRICARE payments were... radiology services specified in the regulation as being reimbursed under the allowable charge...

  13. Duality and Other Exotic Gauge Dynamics in Software Broken Supersymmetric QCD

    CERN Document Server

    Peskin, M

    2003-01-01

    We analyze the theory of softly broken supersymmetric QCD. Exotic behavior like spontaneously broken baryon number, massless composite fermions and Seiberg's duality seems to persist also in the presence of (small) soft supersymmetry breaking. We argue that certain, specially tailored, lattice simulations may be able to detect the novel phenomena. Most of the exotic behavior does not survive the decoupling limit of large SUSY breaking parameters.

  14. Retrieval of a broken guide wire transfixing the hip through the proximal femoral nail hole

    Directory of Open Access Journals (Sweden)

    Jain Saurabh

    2014-02-01

    Full Text Available 【Abstract】Retrieval of a broken guide wire transfixing the acetabulum or with intrapelvic migration is challenging and frustrating for surgeons. We here present a case report on a method to remove a broken guide wire transfixing the acetabulum through the proximal hole of recon nail using a grasping forceps. This method is little invasive, easy, time-saving and without need for changing the inital fixation.

  15. Weakly Nonlinear Theory of Pattern-Forming Systems with Spontaneously Broken Isotropy

    CERN Document Server

    Rossberg, A G; Kramer, L; Pesch, W

    1996-01-01

    Quasi two-dimensional pattern forming systems with spontaneously broken isotropy represent a novel symmetry class, that is experimentally accessible in electroconvection of homeotropically aligned liquid crystals. We present a weakly nonlinear analysis leading to amplitude equations which couple the short-wavelength patterning mode with the Goldstone mode resulting from the broken isotropy. The new coefficients in these equations are calculated from the hydrodynamics. Simulations exhibit a new type of spatio-temporal chaos at onset. The results are compared with experiments.

  16. Proposed fault diagnostics of a broken rotor bar induction motor fed from PWM inverter

    Directory of Open Access Journals (Sweden)

    Faeka M.H. Khater

    2016-12-01

    Full Text Available This paper presents a fault diagnostics technique for a three-phase squirrel cage induction motor. The method is developed using a simplified model affected by bar resistance variation. Based on 3-phase time domain model, the rotor broken bar with different conditions has been simulated to investigate the resulting torque speed characteristic in each condition. The developed fault diagnostics system is capable of identifying the type of the broken-bar faults in the squirrel cage induction machines.

  17. Retrieval of a broken guide wire transfixing the hip through the proximal femoral nail hole

    Institute of Scientific and Technical Information of China (English)

    Saurabh Jain; Abhishek Pathak; Rajeev Kant Pandey

    2014-01-01

    Retrieval of a broken guide wire transfixing the acetabulum or with intrapelvic migration is challenging and frustrating for surgeons.We here present a case report on a method to remove a broken guide wire transfixing the acetabulum through the proximal hole of recon nail using a grasping forceps.This method is little invasive,easy,time-saving and without need for changing the inital fixation.

  18. Lattice study of semileptonic {ital B} decays: {ital {bar B}}{r_arrow}{ital Dl}{bar {nu}} decays

    Energy Technology Data Exchange (ETDEWEB)

    Bowler, K.C.; Hazel, N.M.; Henty, D.S.; Hoeber, H.; Kenway, R.D.; Richards, D.G.; Shanahan, H.P.; Simone, J.N. [Department of Physics & Astronomy, The University of Edinburgh, Edinburgh EH9 3JZ (United Kingdom); Lellouch, L. [Centre de Physique Theorique, CNRS Luminy, Case 907, F-13288 Marseille Cedex 9 (France); Nieves, J.; Sachrajda, C.T.; Wittig, H. [Physics Department, The University, Southampton SO7 1BJ (United Kingdom); (UKQCD Collaboration)

    1995-11-01

    We then use these functions, in conjunction with heavy-quark effective theory, to extract {ital V}{sub {ital c}{ital b}} with no free parameters from the {ital {bar B}}{r_arrow}{ital D}{sup *}{ital l}{bar {nu}} decay rate measured by the ALEPH, ARGUS, and CLEO Collaborations. Using the CLEO data, for instance, we obtain {vert_bar}{ital V}{sub {ital c}{ital b}}{vert_bar} =0.037{sub {minus}1{minus}2{minus}1}{sup +1+2+4}[0.99/1+{beta}{sup {ital A}}{sub 1}(1)]1/1 +{delta}{sub 1/{ital m}{ital c}}{sup 2}, where {delta}{sub 1/{ital m}{ital c}}{sup 2} is the power correction inversely proportional to the square of the charm quark mass, and {beta}{sup {ital A}}{sub 1}(1) is the relevant radiative correction at zero recoil. Here, the first set of errors is experimental, the second represents the statistical error, and the third represents the systematic error in our evaluation of the Isgur-Wise function. We also use our Isgur-Wise functions and heavy-quark effective theory to calculate branching ratios for {ital {bar B}}{sub ({ital s})}{r_arrow}{ital D}{sub ({ital s})}{ital l}{bar {nu}} and {ital {bar B}}{sub ({ital s})}{r_arrow}{ital D}{sub ({ital s})}{sup *}{ital l}{bar {nu}} decays.

  19. Bridging radiology and public health: the emerging field of radiologic public health informatics.

    Science.gov (United States)

    Mollura, Daniel J; Carrino, John A; Matuszak, Diane L; Mnatsakanyan, Zaruhi R; Eng, John; Cutchis, Protagoras; Babin, Steven M; Sniegoski, Carol; Lombardo, Joseph S

    2008-03-01

    Radiology and public health have an emerging opportunity to collaborate, in which radiology's vast supply of imaging data can be integrated into public health information systems for epidemiologic assessments and responses to population health problems. Fueling the linkage of radiology and public health include (i) the transition from analog film to digital formats, enabling flexible use of radiologic data; (ii) radiology's role in imaging across nearly all medical and surgical subspecialties, which establishes a foundation for a consolidated and uniform database of images and reports for public health use; and (iii) the use of radiologic data to characterize disease patterns in a population occupying a geographic area at one time and to characterize disease progression over time via follow-up examinations. The backbone for this integration is through informatics projects such as Systematized Nomenclature of Medicine Clinical Terms and RadLex constructing terminology libraries and ontologies, as well as algorithms integrating data from the electronic health record and Digital Imaging and Communications in Medicine Structured Reporting. Radiology's role in public health is being tested in disease surveillance systems for outbreak detection and bioterrorism, such as the Electronic Surveillance System for the Early Notification of Community-based Epidemics. Challenges for radiologic public health informatics include refining the systems and user interfaces, adhering to privacy regulations, and strengthening collaborative relations among stakeholders, including radiologists and public health officials. Linking radiology with public health, radiologic public health informatics is a promising avenue through which radiology can contribute to public health decision making and health policy.

  20. Distinction of broken cellular wall Ganoderma lucidum spores and G. lucidum spores using FTIR microspectroscopy

    Science.gov (United States)

    Chen, Xianliang; Liu, Xingcun; Sheng, Daping; Huang, Dake; Li, Weizu; Wang, Xin

    2012-11-01

    In this paper, FTIR microspectroscopy was used to identify broken cellular wall Ganoderma lucidum spores and G. lucidum spores. For IR spectra, broken cellular wall G. lucidum spores and G. lucidum spores were mainly different in the regions of 3000-2800, 1660-1600, 1400-1200 and 1100-1000 cm-1. For curve fitting, the results showed the differences in the protein secondary structures and the polysaccharide structures/content between broken cellular wall G. lucidum spores and G. lucidum spores. Moreover, the value of A1078/A1741 might be a potentially useful factor to distinguish broken cellular wall G. lucidum spores from G. lucidum spores. Additionally, FTIR microspectroscopy could identify broken cellular wall G. lucidum spores and G. lucidum spores accurately when it was combined with hierarchical cluster analysis. The result suggests FTIR microspectroscopy is very simple and efficient for distinction of broken cellular wall G. lucidum spores and G. lucidum spores. The result also indicates FTIR microspectroscopy may be useful for TCM identification.

  1. Radiology of gestational trophoblastic neoplasia

    Energy Technology Data Exchange (ETDEWEB)

    Allen, S.D. [Department of Radiology, Charing Cross Hospital, Hammersmith Hospitals NHS Trust, London (United Kingdom); Lim, A.K. [Department of Radiology, Charing Cross Hospital, Hammersmith Hospitals NHS Trust, London (United Kingdom); Seckl, M.J. [Department of Medical Oncology, Charing Cross Hospital, Hammersmith Hospitals NHS Trust, London (United Kingdom); Blunt, D.M. [Department of Radiology, Charing Cross Hospital, Hammersmith Hospitals NHS Trust, London (United Kingdom); Mitchell, A.W. [Department of Radiology, Charing Cross Hospital, Hammersmith Hospitals NHS Trust, London (United Kingdom)]. E-mail: amitchell@hhnt.org

    2006-04-15

    Gestational trophoblastic neoplasia (GTN) encompasses a broad spectrum of placental lesions from the pre-malignant hydatidiform mole (complete and partial) through to the malignant invasive mole, choriocarcinoma and rare placental site trophoblastic tumour (PSTT). Ultrasound remains the radiological investigation of choice for initial diagnosis, and it can also predict invasive and recurrent disease. Magnetic resonance imaging is of invaluable use in assessing extra-uterine tumour spread, tumour vascularity, and overall staging. Positron emission tomography and computed tomography undoubtedly have a role in recurrent and metastatic disease, while angiography has a place in disease and complication management. This review will describe the relevant pathophysiology and natural history of GTN, and the use of imaging techniques in the diagnosis and management of these conditions.

  2. Radiologic Imaging of Diaphragmatic Pathologies

    Directory of Open Access Journals (Sweden)

    Hatice Öztürkmen Akay

    2004-01-01

    Full Text Available We researched the images methods in the evaluation of diaphragmaticpathologies. The study was done with 30 patients (21 males, 9 females. Themedian age of the patients was 36.1 years (Range 1-74 years. Firstly,lateraly and posteroanterior chest X-Ray were done in all patients the otherradiological images were the Barium examination, ultrasonography,computerized tomography and magnetic rezonans imaging. We determineddiaphragmatic pseudotumour in 4 patients, congenital diaphragmatichernia in 6 patients, diaphragmatic paralysis in 2 patients, diaphragmaticelevation in 8 patients, hiatal hernia in 5 patients, and diaphragmaticrupture in 5 patients.Although radiological images were developed all, we believe that thediaphragmatic pathologies should be evaluated with both clinically andradiologically in all patients.

  3. Radiological aspects of psoriatic osteoarthropathia

    Energy Technology Data Exchange (ETDEWEB)

    Ellegast, H.H.; Haydl, H.; Petershofer, H.; Prohaska, E.

    1984-03-01

    Psoriatic osteoarthropathia is a disease of the joints, spine, and bones. It belongs to the category of ''seronegative spondarthritis'', the prototype of which is ankylosing spondylitis. Contrary to earlier assumptions, morphological changes in the X-ray picture are frequent if the joints (psoriatic arthritis) or axial skeleton (psoriatic spondylitis) are affected. Radiographic signs are listed and scintigraphic findings discussed. The morphological changes in the X-ray picture are characteristic, even without psoriatic lesions of the skin. Sacro-iliac changes in the axial skeleton are frequent. In other parts of the skeleton, typical parasyndesmophytes are slightly less frequent, and changes as in ankylosing spondylitis may occur. The diagnosis is easier with whole-body scintiscanning as this technique is able to detect early changes which are not noticeable clinically or radiologically.

  4. The interventional radiology business plan.

    Science.gov (United States)

    Beheshti, Michael V; Meek, Mary E; Kaufman, John A

    2012-09-01

    Strategic planning and business planning are processes commonly employed by organizations that exist in competitive environments. Although it is difficult to prove a causal relationship between formal strategic/business planning and positive organizational performance, there is broad agreement that formal strategic and business plans are components of successful organizations. The various elements of strategic plans and business plans are not common in the vernacular of practicing physicians. As health care becomes more competitive, familiarity with these tools may grow in importance. Herein we provide an overview of formal strategic and business planning, and offer a roadmap for an interventional radiology-specific plan that may be useful for organizations confronting competitive and financial threats.

  5. Radiological maps for Trabzon, Turkey

    Energy Technology Data Exchange (ETDEWEB)

    Kurnaz, A., E-mail: asliy@ktu.edu.t [Karadeniz Technical University, Department of Physics, 61080 Trabzon (Turkey); Kucukomeroglu, B. [Karadeniz Technical University, Department of Physics, 61080 Trabzon (Turkey); Damla, N. [Batman University, Department of Physics, 72060 Batman (Turkey); Cevik, U. [Karadeniz Technical University, Department of Physics, 61080 Trabzon (Turkey)

    2011-04-15

    The activity concentrations and absorbed gamma dose rates due to primordial radionuclides and {sup 137}Cs have been ascertained in 222 soil samples in 18 counties of the Trabzon province of Turkey using a HPGe detector. The mean activity concentrations of {sup 238}U, {sup 232}Th, {sup 40}K and {sup 137}Cs in soil samples were 41, 35, 437 and 21 Bq kg{sup -1}, respectively. Based on the measured concentrations of these radionuclides, the mean absorbed gamma dose in air was calculated as 59 nGy h{sup -1} and hence, the mean annual effective dose due to terrestrial gamma radiation was calculated as 72 {mu}Sv y{sup -1}. In addition, outdoor in situ gamma dose rate (D) measurements were performed in the same 222 locations using a portable NaI detector and the annual effective dose was calculated to be 66 {mu}Sv y{sup -1} from these results. The results presented in this study are compared with other parts of Turkey. Radiological maps of the Trabzon province were composed using the results obtained from the study. - Highlights: {yields} {yields}The study highlights activity concentrations of {sup 238}U, {sup 232}Th, {sup 40}K and {sup 137}Cs in soil. {yields} The absorbed gamma dose in air and the mean annual effective dose were calculated. {yields} The calculated results compared with outdoor in situ gamma dose measurements. {yields} Radiological maps of the Trabzon province were created using ArcGIS applications. {yields} The results will be valuable data for future estimations of radioactive pollution.

  6. Bacteriological Monitoring of Radiology Room Apparatus in the Department of Radiological Technology and Contamination on Hands of Radiological Technologists

    Energy Technology Data Exchange (ETDEWEB)

    Kim, Seon Chil [Dept. of Radiologic Technology, Daegu Health College, Daegu (Korea, Republic of)

    2008-12-15

    Distribution of microorganisms were examined for the bucky tables in the radiology rooms of the department of radiological technology, the aprons, handles of various apparatus, handles of mobile radiological apparatus, and hands of the radiological technologists. As a result, relatively larger amounts of bacteria were found on the handles of the mobile radiological apparatus and the aprons. Among the isolated bacteria, Acinetobacter baumanni (7.3%), Klebsiella pneumoniae (6.7%), Staphylococcus aureus (3.9%), Serratia liquefaciens (1.7%), Enterobacter cloaceae (0.6%), Providenica rettgeri (0.6%) are known as the cause of nosocomial infection (hospital acquired infection). In addition, similar colonies were also found on the hands of the radiological technologists such as microorganisms of Klebsiella pneumoniae (8.4%), Staphylococcus aureus (6.6%), Yersinia enterocolotica (5.4%), Acinetobacter baumanni (4.2%), Enterobacter cloaceae (2.4%), Serratia liquefaciens (1.8%), Yersinia pseuotuberculosis (18%), Enterobacter sakazakii (1.2%), and Escherichia coli (0.6%). In particular, this result indicates clinical significance since Staphylococcus aureus and Escherichia coli show strong pathogenicity. Therefore, a continuous education is essential for the radiological technologists to prevent the nosocomial infection.

  7. Photon-neutrino angular correlation in the reaction {mu}{sup -28}Si(0{sup +}, O) {r_arrow}{nu}{sup 28} Al(1{sup +}, 2202) {r_arrow} {gamma}{sup 28} Al(0{sup +}, 972)

    Energy Technology Data Exchange (ETDEWEB)

    Gorringe, T.P.; Bauer, J.; Johnson, B. [and others

    1993-04-01

    The angular correlation between the photon and the neutrino in the reaction {mu}{sup {minus}} {sup 28}Si(0{sup +},0) {r_arrow} {nu} {sup 28}Al(1{sup +},2202) {r_arrow} {gamma} {sup 28}Al(0{sup +},972) is sensitive to the weak pseudoscalar coupling (g{sub p}) of the proton, and its modification in the nuclear medium. The correlation can be measured via the energy spectrum of the 1229 keV photon, since the photon is emitted from a moving source it gets a Doppler energy shift that indicates the direction of the {sup 28}Al recoil and the neutrino. Miller et al have measured the 1229 keV energy spectrum but poor signal to background limited the determination of the {gamma}-{nu} angular correlation. To improve the signal to background the authors have measured the 1229 keV photon in coincidence with the following 941 keV photon. In this experiment the 1229 keV photons are detected in a pair of Compton suppressed Ge detectors, and the 941 keV photons are detected in an array of NaI detectors. With the coincidence the authors have improved the signal to background from 1:4 to 5:1. In a recent measurement at the TRIUMF laboratory 20,000 coincidences from this reaction were collected, and the authors expect a determination of the pseudoscalar coupling to about 10%.

  8. Clinical experience of ocular trauma with metallic arrow-headed foreign bodies%眼部弓箭射伤诊治的体会

    Institute of Scientific and Technical Information of China (English)

    林育华

    2011-01-01

    Objective To discuss surgical treatments of patients with orbital foreign bodies. Methods We analyzed 7 cases(7 eyes) of eye injury with arrow-head foreign body.The huge foreign body (arrows)was extracted after soft tissue separation was done or the removal of arrows was together with enucleation. Results Arrows were completely removed in all the patients. No sight-threatening to patients if there was no eyeball injury. The sight was lost in patients with eyeball rupture. Craniocerebral trauma and neurological complications occurred on the basis of the depth of the arrows in the patients' eyes. Conclusion It is rare that arrows are orbital foreign bodies,which should be removed timely by surgery. Computer tomography (CT) examination should done before the operation. The method of operation depends on the eye injury positions and the accompanied eyeball double perforation and craniocerebral trauma.%目的 探讨眼部弓箭射伤的手术治疗方法.方法 7例(7眼)眼部弓箭伤进行分析.7例眼部巨大异物(箭)分别采用分离软组织后拔出和眼球摘除同时拔出异物(箭).结果 7例均完整取出弓箭异物,不伤及眼球者视力完好,眼球破裂者视力丧失,伴颅脑损伤者有神经并发症.结论 眼部弓箭射伤是罕见的眼部巨大异物,需及时手术取出,术前行CT检查,手术的方式根据箭伤及的部位和是否伴有眼球贯通和颅脑伤.

  9. Attention Orienting in Response to Non-conscious Hierarchical Arrows: Individuals with Higher Autistic Traits Differ in Their Global/Local Bias

    Science.gov (United States)

    Laycock, Robin; Chan, Daniel; Crewther, Sheila G.

    2017-01-01

    One aspect of the social communication impairments that characterize autism spectrum disorder (ASD) include reduced use of often subtle non-verbal social cues. People with ASD, and those with self-reported sub-threshold autistic traits, also show impairments in rapid visual processing of stimuli unrelated to social or emotional properties. Hence, this study sought to investigate whether perceptually non-conscious visual processing is related to autistic traits. A neurotypical sample of thirty young adults completed the Subthreshold Autism Trait Questionnaire and a Posner-like attention cueing task. Continuous Flash Suppression (CFS) was employed to render incongruous hierarchical arrow cues perceptually invisible prior to consciously presented targets. This was achieved via a 10 Hz masking stimulus presented to the dominant eye that suppressed information presented to the non-dominant eye. Non-conscious arrows consisted of local arrow elements pointing in one direction, and forming a global arrow shape pointing in the opposite direction. On each trial, the cue provided either a valid or invalid cue for the spatial location of the subsequent target, depending on which level (global or local) received privileged attention. A significant autism-trait group by global cue validity interaction indicated a difference in the extent of non-conscious local/global cueing between groups. Simple effect analyses revealed that whilst participants with lower autistic traits showed a global arrow cueing effect, those with higher autistic traits demonstrated a small local arrow cueing effect. These results suggest that non-conscious processing biases in local/global attention may be related to individual differences in autistic traits. PMID:28149288

  10. Periinterventional prophylactic antibiotics in radiological port catheter implantation; Periinterventionelle prophylaktische Antibiotikagabe bei der radiologischen Portkatheterimplantation

    Energy Technology Data Exchange (ETDEWEB)

    Gebauer, B.; Teichgraeber, U.; Werk, M. [Charite, Universitaetsmedizin Berlin (Germany). Klinik fuer Strahlenheilkunde; Wagner, H.J. [Vivantes Klinikum im Friedrichshain und am Urban (Germany). Inst. fuer Radiologie

    2007-08-15

    Purpose: To evaluate whether catheter-related infections after radiologically placed port catheters can be reduced by single-shot periinterventional antibiosis. Materials and Method: Between January and September 2002, 164 consecutive patients with indication for central venous port catheter implantation were included in the present study. During implantation the interventional radiologist was responsible for deciding whether to administer a prophylactic single-shot antibiosis. The prophylactic antibiosis entailed intravenous administration of ampicillin and sulbactam (3 g Unacid, Pfizer) or 100 mg ciprofloxacine (Ciprobay, Bayer) in the case of an allergy history to penicillins. Catheter-related infection was defined as a local or systemic infection necessitating port catheter extraction. Results: Indication for port catheter implantation was a malignant disease requiring chemotherapy in 158 cases. The port catheter (Chemosite [Tyco Healthcare] [n = 123], low-profile [Arrow International] [n = 35], other port system [n = 6]) was implanted via sonographically guided puncture of the right jugular vein in 139 patients, via the left jugular vein in 24 cases and via the right subclavian vein in one patient. 75 patients received periinterventional prophylactic antibiosis (Unacid [n = 63] Ciprobay [n = 12]) and 89 patients did not receive antibiosis. The prophylactic antibiosis caused a minor allergic reaction in one patient that improved with antihistamic and corticoid medication. A total of 7 ports, 6 without prophylactic antibiosis versus one with periinterventional prophylaxis, were extracted due to infectious complications. Conclusion: Single-shot periinterventional prophylactic antibiosis can reduce early and late infectious complications after radiological-interventional placement of central venous port catheters. (orig.)

  11. Anomalous directional behaviour of the real parts of the induction arrows in the Eastern Alps: tectonic and palaeogeographic implications

    Directory of Open Access Journals (Sweden)

    P. A. Schnegg

    2001-06-01

    Full Text Available The electromagnetic induction pattern in the Eastern Alps is characterised by a (continuous large-scale zone on which the real parts of the induction arrows show anomalous directional behaviour. This zone extends from the Penninic Domain of Eastern Switzerland (Graubünden probably into the Carpathian ranges. A coarse mesh of a Magnetotelluric (MT and Geomagnetic Deep Sounding (GDS station in the Alps of Graubünden and Valais (Western Switzerland indicates that this electromagnetic anomaly is restricted to the Mesozoic sediments of the North Penninic Bündnerschiefer-facies that begins in Eastern Switzerland and extends towards the east beneath Austroalpine, South Penninic and Southalpine units. Striking similarities in position and arrangement between this zone and the magnetic signature in the Eastern Alps are found. The analysis of the GDS data with the method of the Hypothetical Event Analysis (HEA shows that current channelling affects the electromagnetic fields in this zone and causes the anomalous direction of induction arrows. Based on the combined interpretation of GDS data from the Eastern Alps and West Hungary together with our recent data from Switzerland, the following geological implications are discussed: i a spatial decoupling of induction processes from the upper to the lower crust; ii a lower crustal conductive structure caused by the indentation of the Northern Adriatic promontory or terrane; iii the eastward continuation of the Bündnerschiefer-facies at least to the tectonic window of Rechnitz.

  12. The politics of attention contextualized: gaze but not arrow cuing of attention is moderated by political temperament.

    Science.gov (United States)

    Carraro, Luciana; Dalmaso, Mario; Castelli, Luigi; Galfano, Giovanni

    2015-08-01

    It is known that an averted gaze can trigger shifts of attention in an observer, a phenomenon known as gaze-cuing effect. Recently, Dodd et al. (Atten Percept Psychophys 73:24-29, 2011) have reported a reliable gaze-cuing effect for liberals but not for conservatives. The present study tested whether this result is gaze-specific or extends over nonsocial spatial signals. Conservatives and liberals took part in a spatial-cuing task in which centrally placed gaze and arrow cues, pointing rightward or leftward, were followed by a peripheral onset target requiring a simple detection response. Whereas a reliable cuing effect was present for both gaze and arrow cues in the case of liberals, conservatives showed a reduced cuing response only for gaze cues. These results provide further support for the pattern reported by Dodd et al. (2011) and are consistent with the view that conservatives are less susceptible to the influence of spatial cues provided by other individuals.

  13. Radiology case of the month. Abnormally dilated arteries in an asymptomatic male. RADIOLOGIC DIAGNOSIS: Aortic coarctation. There is narrowing in the region of the aortic isthmus (arrows, Figures 2 and 4). The extent of collateral arterial dilation (arrows, Figures 1 and 3) suggests this to be a hemodynamically significant finding.

    Science.gov (United States)

    Mabry, Christian; Yandle, Gretchen; Erbil, Jen; Happel, Kyle; Neitzschman, Harold R

    2014-01-01

    A 61-year-old male with a past medical history of chronic, uncontrolled hypertension received a non-contrasted computed tomogram (CT) of the chest and abdomen to investigate for possible Conn syndrome. This noncontrast study showed some areas of nodularity around the vertebral bodies bilaterally and extending into the posterior mediastinal region. A CT of the chest with intravenous contrast, and 3D reconstruction were then obtained.

  14. Evidence-Based Radiology (EBR

    Directory of Open Access Journals (Sweden)

    Mansoor Fatehi

    2009-01-01

    Full Text Available   "nRecent increase in scientific advancements has led to inability to cover many scientific data and remain “up-to-date”. Nowadays doubling time of scientific data production is remarkably reduced, so that there is no adequate time to find this information and it seems inevitable to use resources which periodically assess most published papers or web-based data in that particular field to finally provide evidence-based knowledge, namely “Evidence-Based Medicine (EBM” in medical sciences. EBM is the systematic, scientific and explicit use of current best evidence in making decisions about the care of individual patients. Medical practice is largely based on clinical anecdotes, uncontrolled investigations and expert opinion. In radiology, the situation is especially problematic. "nRadiologists require to be able to evaluate studies in the literature, i.e., how reliable is this information and does it apply to patients in the radiologist’s practice? "nWe may find that our textbooks are out of date, guidelines are non-specific and there are conflicting "nor unreliable reports in the literature. Expert opinions vary from centre to centre. "nWhen we go to the literature ourselves, the first problem we encounter is the volume of literature being published and the next (at least for most of us is lack of training in how to separate good studies from weak ones. Evidence-based radiology (EBR can be a solution. "nThere are 5 steps in applying an approach as a solution: "n1. Ask - Information needs relevant to individual patients are converted into ‘answerable’ or ‘focused’ questions. "n2. Search - A comprehensive literature search is performed to find the best evidence to help answer these questions. "n3. Appraise - The evidence must then be critically appraised, in an explicit and structured manner, in order to establish its validity, reliability and usefulness in practice. "n4. Apply - The results of this critical appraisal are then

  15. Broken Time Translation Symmetry as a Model for Quantum State Reduction

    Directory of Open Access Journals (Sweden)

    Jasper van Wezel

    2010-04-01

    Full Text Available The symmetries that govern the laws of nature can be spontaneously broken, enabling the occurrence of ordered states. Crystals arise from the breaking of translation symmetry, magnets from broken spin rotation symmetry and massive particles break a phase rotation symmetry. Time translation symmetry can be spontaneously broken in exactly the same way. The order associated with this form of spontaneous symmetry breaking is characterised by the emergence of quantum state reduction: systems which spontaneously break time translation symmetry act as ideal measurement machines. In this review the breaking of time translation symmetry is first compared to that of other symmetries such as spatial translations and rotations. It is then discussed how broken time translation symmetry gives rise to the process of quantum state reduction and how it generates a pointer basis, Born’s rule, etc. After a comparison between this model and alternative approaches to the problem of quantum state reduction, the experimental implications and possible tests of broken time translation symmetry in realistic experimental settings are discussed.

  16. A new diagnosis of broken rotor bar fault extent in three phase squirrel cage induction motor

    Science.gov (United States)

    Shi, Pu; Chen, Zheng; Vagapov, Yuriy; Zouaoui, Zoubir

    2014-01-01

    This paper proposes a new induction motor broken bar fault extent diagnostic approach under varying load conditions based on wavelet coefficients of stator current in a specific frequency band. In this paper, winding function approach (WFA) is used to develop a mathematical model to provide indication references for parameters under different load levels and different fault cases. It is shown that rise of number of broken bars and load levels increases amplitude of the particular side band components of the stator currents in faulty case. Stator current, rotor speed and torque are used to demonstrate the relationship between these parameters and broken rotor bar severity. An induction motor with 1, 2 and 3 broken bars and the motor with 3 broken bars in experiment at no-load, 50% and 100% load are investigated. A novel criterion is then developed to assess rotor fault severity based on the stator current and the rotor speed. Simulations and experimental results confirm the validity of the proposed approach.

  17. Removal of a broken intramedullary femoral nail with an unusual pattern of breakage: a case report

    Science.gov (United States)

    Rodriguez Martin, Juan; Resines Erasun, Carlos

    2009-01-01

    To the best of our knowledge, only 3 cases, including the present case, have been reported with a three part broken pattern. However, this is the first case associated with a distal locking screw broken. We report the case of a 31-year-old patient who sustained an open femoral shaft fracture . The fracture was stabilized with a Kuntcher femoral nail. After 7 months of the initial surgery he presented with a three part broken intramedullary nail and the distal locking screw broken. We used a combined technique for the removal of the nail through the nonunion fracture site; we used a pull out technique for the middle fragment and a curved thin hook for the distal fragment. Then we applied bone allograft and stabilized with a cannulated intramedullary femoral nail (Synthes, Oberdorf, Switzerland). After 2 years of follow up the nonunion was consolidated and the patient presented a good clinical outcome. This is of particular interest because it is a unique case and the association with a broken distal locking screw is reported for the first time in this study. A combination of methods through the nonunion site approach and an alternative instrumental is a good method for the removal of a hollow femoral intramedullary nail with this unusual pattern of breakage. PMID:19777163

  18. Complications of pneumoconiosis: Radiologic overview

    Energy Technology Data Exchange (ETDEWEB)

    Jun, Jae Sup [Department of Radiology, Seoul St. Mary' s Hospital, College of Medicine, The Catholic University of Korea (Korea, Republic of); Jung, Jung Im, E-mail: jijung@catholic.ac.kr [Department of Radiology, Seoul St. Mary' s Hospital, College of Medicine, The Catholic University of Korea (Korea, Republic of); Kim, Hyo Rim [Department of Radiology, Yeouido St. Mary' s Hospital, College of Medicine, The Catholic University of Korea (Korea, Republic of); Ahn, Myeong Im; Han, Dae Hee [Department of Radiology, Seoul St. Mary' s Hospital, College of Medicine, The Catholic University of Korea (Korea, Republic of); Ko, Jeong Min [Department of Radiology, St. Vincent Hospital, College of Medicine, The Catholic University of Korea (Korea, Republic of); Park, Seog Hee; Lee, Hae Giu [Department of Radiology, Seoul St. Mary' s Hospital, College of Medicine, The Catholic University of Korea (Korea, Republic of); Arakawa, Hiroaki [Department of Radiology, Dokkyo University School of Medicine (Japan); Koo, Jung-Wan [Department of Occupational and Environmental Medicine, Seoul St. Mary' s Hospital, The Catholic University of Korea (Korea, Republic of)

    2013-10-01

    A wide spectrum of pulmonary complications occurs in patients with pneumoconiosis. Those complications include chronic obstructive pulmonary disease, hemoptysis, pneumothorax, pleural disease, tuberculosis, autoimmune disease, anthracofibrosis, chronic interstitial pneumonia, and malignancy. Generally, imaging workup starts with plain chest radiography. However, sometimes, plain radiography has limited role in the diagnosis of pulmonary complications of pneumoconiosis because of overlapping pneumoconiotic infiltration. Computed tomography (CT), ultrasonography (US), and magnetic resonance imaging (MRI) are potentially helpful for the detection of pulmonary complications in patients with pneumoconiosis. CT, with its excellent contrast resolution, is more sensitive and specific method than plain radiograph in the evaluation of pulmonary abnormalities. CT is useful in detecting lung parenchymal abnormalities caused by infection, anthracofibrosis, and chronic interstitial pneumonia. Also, CT is valuable in distinguishing localized pneumothorax from bullae and aiding the identification of multiloculated effusions. US can be used in detection of complicated pleural effusions and guidance of the thoracentesis procedure. MRI is useful for differentiating between progressive massive fibrosis and lung cancer. Radiologists need to be familiar with the radiologic and clinical manifestations of, as well as diagnostic approaches to, complications associated with pneumoconiosis. Knowledge of the various imaging features of pulmonary complications of pneumoconiosis can enhance early diagnosis and improve the chance to cure.

  19. Patient dosimetry in diagnostic radiology

    Directory of Open Access Journals (Sweden)

    Ciraj-Bjelac Olivera F.

    2003-01-01

    Full Text Available The objective of this work is to assess patient organ doses, effective doses and entrance surface doses in conventional diagnostic radiology procedures for standard adult patient. The survey consists of measurements of doses delivered to 239 patients in nine types of X-ray examinations. Three types of data were collected: X-ray machine data, patient data, and output measurements. Entrance surface dose was assessed based on the survey data and subsequently, using conversion coefficients, the organ doses and effective doses were calculated. Values of the entrance surface dose and the effective dose were estimated to be 0.4 to 5.8 mGy and 0.03 to 3.00 mSv for different examinations. Derived doses were compared with recommended general diagnostic reference levels. The impact of examination parameters on dose values was discussed. Except for posterior-anterior chest examination, all estimated doses are lower than stated reference levels. Survey data are aimed at helping development of national quality control and radiation protection programmed for medical exposures.

  20. Multilingual retrieval of radiology images.

    Science.gov (United States)

    Kahn, Charles E

    2009-01-01

    The multilingual search engine ARRS GoldMiner Global was created to facilitate broad international access to a richly indexed collection of more than 200,000 radiologic images. Images are indexed according to key-words and medical concepts that appear in the unstructured text of their English-language image captions. GoldMiner Global exploits the Unicode standard, which allows the accurate representation of characters and ideographs from virtually any language and which supports both left-to-right and right-to-left text directions. The user interface supports queries in Arabic, Chinese, French, German, Italian, Japanese, Korean, Portuguese, Russian, or Spanish. GoldMiner Global incorporates an interface to the United States National Library of Medicine that translates queries into English-language Medical Subject Headings (MeSH) terms. The translated MeSH terms are then used to search the image index and retrieve relevant images. Explanatory text, pull-down menu choices, and navigational guides are displayed in the selected language; search results are displayed in English. GoldMiner Global is freely available on the World Wide Web.

  1. Interventional radiology in pediatric oncology

    Energy Technology Data Exchange (ETDEWEB)

    Hoffer, Fredric A. [Division of Diagnostic Imaging, Department of Radiological Sciences, St. Jude Children' s Research Hospital, 332 N. Lauderdale St., Memphis, TN 38105 (United States)]. E-mail: fred.hoffer@stjude.org

    2005-01-01

    There are many radiological interventions necessary for pediatric oncology patients, some of which may be covered in other articles in this publication. I will discuss a number of interventions including percutaneous biopsy for solid tumor and hematological malignancy diagnosis or recurrence, for the diagnosis of graft versus host disease after stem cell or bone marrow transplantation, and for the diagnosis of complications of immunosuppression such as invasive pulmonary aspergillosis. In the past, tumor localization techniques have been necessary to biopsy or resect small lesions. However improved guidance techniques have allowed for more precise biopsy and the use of thermal ablation instead of excision for local tumor control. A percutaneously placed radio frequency, microwave, laser or cryogen probe can ablate the primary and metastatic tumors of the liver, lung, bone, kidney and other structures in children. This is an alternative treatment for the local control of tumors that may not be amenable to surgery, chemotherapy or radiotherapy. I will also describe how chemoembolization can be used to treat primary or metastatic tumors of the liver that have failed other therapies. This treatment delivers chemotherapy in the hepatic artery infused with emboli to increase the dwell time and concentration of the agents.

  2. Diagnostic errors in pediatric radiology

    Energy Technology Data Exchange (ETDEWEB)

    Taylor, George A.; Voss, Stephan D. [Children' s Hospital Boston, Department of Radiology, Harvard Medical School, Boston, MA (United States); Melvin, Patrice R. [Children' s Hospital Boston, The Program for Patient Safety and Quality, Boston, MA (United States); Graham, Dionne A. [Children' s Hospital Boston, The Program for Patient Safety and Quality, Boston, MA (United States); Harvard Medical School, The Department of Pediatrics, Boston, MA (United States)

    2011-03-15

    Little information is known about the frequency, types and causes of diagnostic errors in imaging children. Our goals were to describe the patterns and potential etiologies of diagnostic error in our subspecialty. We reviewed 265 cases with clinically significant diagnostic errors identified during a 10-year period. Errors were defined as a diagnosis that was delayed, wrong or missed; they were classified as perceptual, cognitive, system-related or unavoidable; and they were evaluated by imaging modality and level of training of the physician involved. We identified 484 specific errors in the 265 cases reviewed (mean:1.8 errors/case). Most discrepancies involved staff (45.5%). Two hundred fifty-eight individual cognitive errors were identified in 151 cases (mean = 1.7 errors/case). Of these, 83 cases (55%) had additional perceptual or system-related errors. One hundred sixty-five perceptual errors were identified in 165 cases. Of these, 68 cases (41%) also had cognitive or system-related errors. Fifty-four system-related errors were identified in 46 cases (mean = 1.2 errors/case) of which all were multi-factorial. Seven cases were unavoidable. Our study defines a taxonomy of diagnostic errors in a large academic pediatric radiology practice and suggests that most are multi-factorial in etiology. Further study is needed to define effective strategies for improvement. (orig.)

  3. CLINICAL, RADIOLOGICAL AND GENETIC ASPECTS OF LEUKODYSTROPHIES

    NARCIS (Netherlands)

    Laszlo, A.; Elpeleg, On; Horvath, K.; Jakobs, C.; Kobor, J.; Gal, A.; Barsi, P.; Kelemen, A.; Saracz, J.; Svekus, A.; Tegzes, A.; Voeroes, E.

    2010-01-01

    The authors summarize the pathomechanism of the myelination process, the clinical, radiological and the genetical aspects of the leukodystrophies, as in 18q deletion syndrome, adrenoleukodysrtophy, metachromatic leukodystrophy, Pelizaeus-Merzbacher leukodystrophy, Alexander disease and olivo-ponto-c

  4. How to Read Your Radiology Report

    Science.gov (United States)

    ... pelvis. Impression In the impression section, the radiologist combines the findings, patient clinical history and indication for ... radiology report. View full size with caption Related Articles and Media What does a radiologist do? Sponsored ...

  5. Radiological safety training for uranium facilities

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1998-02-01

    This handbook contains recommended training materials consistent with DOE standardized core radiological training material. These materials consist of a program management guide, instructor`s guide, student guide, and overhead transparencies.

  6. Radiological dose assessment for vault storage concepts

    Energy Technology Data Exchange (ETDEWEB)

    Richard, R.F.

    1997-02-25

    This radiological dose assessment presents neutron and photon dose rates in support of project W-460. Dose rates are provided for a single 3013 container, the ``infloor`` storage vault concept, and the ``cubicle`` storage vault concept.

  7. Diagnostic radiology in paediatric palliative care

    Energy Technology Data Exchange (ETDEWEB)

    Patel, Preena; Koh, Michelle; Carr, Lucinda; McHugh, Kieran [Great Ormond Street Hospital, Radiology Department, London (United Kingdom)

    2014-01-15

    Palliative care is an expanding specialty within paediatrics, which has attracted little attention in the paediatric radiological literature. Paediatric patients under a palliative care team will have numerous radiological tests which we traditionally categorise under organ systems rather than under the umbrella of palliative medicine. The prevalence of children with life-limiting illness is significant. It has been estimated to be one per thousand, and this may be an underestimate. In this review, we will focus on our experience at one institution, where radiology has proven to be an invaluable partner to palliative care. We will discuss examples of conditions commonly referred to our palliative care team and delineate the crucial role of diagnostic radiology in determining treatment options. (orig.)

  8. Corporate social responsibility of future radiology professionals.

    Science.gov (United States)

    Collins, Sandra K; Collins, Kevin S

    2011-01-01

    Plagued by difficult economic times, many radiology managers may find themselves faced with ethical dilemmas surrounding ongoing organizational pressures to maintain high levels of productivity with restricted resources. This often times tests the level of moral resilience and corporate social consciousness of even the most experienced radiology professionals. A study was conducted to determine what Corporate Social Responsibility (CSR) orientation and viewpoint future radiology professionals may have. The results of the study indicate that these study participants may initially consider patient care more important than profit maximization. Study results indicate that these specific future radiology professionals will not need laws, legal sanctions, and intensified rules to force them to act ethically. However,they may need ongoing training as to the necessity of profit maximization if they seek the highest quality of care possible for their patients.

  9. Role of Radiology in Forensic Dentistry

    Directory of Open Access Journals (Sweden)

    T Chandrasekhar

    2011-01-01

    Full Text Available Forensic radiology is a specialized area of medical imaging utilizing radiological techniques to assist physicians and pathologists in matter pertaining to the law. Postmortem dental radiographs are the most consistent part of the antemortem records that can be transmitted during the forensic examination procedures. Pathologists regularly use radiographic images during the course of autopsy to assist them in identification of foreign bodies or determination of death. Forensic radiology can be used in suspicious death or murder, in analysis of adverse medical events, solving legal matters, to detect child abuse, drug trafficking, body identification and disease identification. Using the possibilities of radiology, special characteristics of the internal structures of the dentomaxillofacial region can be revealed. We can also detect endodontic treatments, healing extraction sockets, implants or even tooth colored restoration. Therefore, we can give answers to problems dealing with identification procedures, mass disaster and dental age estimation.

  10. 42 CFR 482.26 - Condition of participation: Radiologic services.

    Science.gov (United States)

    2010-10-01

    ... radiologic services, particularly ionizing radiology procedures, must be free from hazards for patients and... qualified full-time, part-time, or consulting radiologist must supervise the ionizing radiology services and... osteopathy who is qualified by education and experience in radiology. (2) Only personnel designated...

  11. Radiological interventions in malignant biliary obstruction

    Institute of Scientific and Technical Information of China (English)

    Kumble Seetharama Madhusudhan; Shivanand Gamanagatti; Deep Narayan Srivastava; Arun Kumar Gupta

    2016-01-01

    Malignant biliary obstruction is commonly caused by gall bladder carcinoma, cholangiocarcinoma and metastatic nodes. Percutaneous interventions play an important role in managing these patients. Biliary drainage, which forms the major bulk of radiological interventions, can be pal iative in inoperable patients or pre-operative to improve liver function prior to surgery. Other interventions include cholecystostomy and radiofrequency ablation. We present here the indications, contraindications, technique and complications of the radiological interventions performed in patients with malignant biliary obstruction.

  12. Radiologic Professionalism in Modern Health Care.

    Science.gov (United States)

    Hryhorczuk, Anastasia L; Hanneman, Kate; Eisenberg, Ronald L; Meyer, Elaine C; Brown, Stephen D

    2015-10-01

    Modern radiology is at the forefront of technological progress in medicine, a position that often places unique challenges on its professional character. This article uses "Medical Professionalism in the New Millennium: A Physician Charter," a document published in 2002 and endorsed by several major radiology organizations, as a lens for exploring professional challenges in modern radiology. The three main tenets of the Charter emphasize patient welfare, patient autonomy, and the reduction of disparities in health care distribution. This article reviews the ways in which modern technology and financial structures potentially create stressors on professionalism in radiology, while highlighting the opportunities they provide for radiologists seeking to fulfill the professional goals articulated in the Charter. Picture archiving and communication systems (PACS) and voice recognition systems have transformed the speed of radiology and enhanced the ability of radiologists to improve patient care but also have brought new tensions to the workplace. Although teleradiology may improve global access to radiologists, it may also promote the commoditization of radiology, which diminishes the professional stature of radiologists. Social media and patient portals provide radiologists with new forums for interacting with the public and patients, potentially promoting patient welfare. However, patient privacy and autonomy are important considerations. Finally, modern financial structures provide radiologists with both entrepreneurial opportunities as well as the temptation for unprofessional conduct. Each of these advances carries the potential for professional growth while testing the professional stature of radiology. By considering the risks and benefits of emerging technologies in the modern radiology world, radiologists can chart an ethical and professional future path.

  13. Current status of radiology in China

    Institute of Scientific and Technical Information of China (English)

    Meng Su Zeng; Kang Rong Zhou; Zhi Yong Zhang; Wei Jun Peng; Fu Hua Yang; Jiang Lin; Jun Yang; Xin Ye Han

    2000-01-01

    @@INTRODUCTION Radiology has been greatly advanced in China since its founding in 1949 and has been developed faster and further more since China adopted the policy of socioeconomic reform in 1978. It plays an increasingly important role in the medical health care and treatment in the country and has reached the world′s advanced level in certain fields. We now briefly review the history of China′s radiology so as to give a clear picture of its development.

  14. A digital library of radiology images.

    Science.gov (United States)

    Kahn, Charles E

    2006-01-01

    A web-based virtual library of peer-reviewed radiological images was created for use in education and clinical decision support. Images were obtained from open-access content of five online radiology journals and one e-learning web site. Figure captions were indexed by Medical Subject Heading (MeSH) codes, imaging modality, and patient age and sex. This digital library provides a new, valuable online resource.

  15. A NATO exercise on radiological sampling.

    Science.gov (United States)

    Haslip, Dean S; Mercier, J R

    2004-11-01

    The North Atlantic Treaty Organization (NATO) has held its first-ever large-scale radiological exercise employing unsealed radioactive sources. The objective of the exercise was to validate NATO protocols on radiological sampling and surveying. However, the exercise also proved to be a valuable training opportunity and was highly instructive to all involved. This paper highlights the lessons learned from this exercise, particularly in the areas of radiation survey equipment and techniques, sampling techniques, and field measurements.

  16. Radiological Worker II Training, Course 20301 (Live), Course 12909 (Test)

    Energy Technology Data Exchange (ETDEWEB)

    Harris, Jimmy D. [Los Alamos National Lab. (LANL), Los Alamos, NM (United States)

    2017-01-13

    Radiological worker training is the basic building block for any additional radiological training you may receive. Upon completing radiological worker training, you will have the basic knowledge needed to work safely, using proper radiological practices, in areas where radiological hazards exist. You will also have a better understanding of the hazards and responsibilities associated with radiological work to help prevent the carelessness that can occur when working continually with or around radioactive material. This course does not qualify you for any specific radiological work. You may be required to take additional training at individual facilities to address facility- and job-specific hazards and procedures.

  17. Psikologis Komunikasi Remaja Broken Home Terhadap Konsep Diri Dan Keterbukaan Diri (Studi Deskriptif Kualitatif Psikologis Komunikasi Remaja Dari Keluarga Broken Home Terhadap Konsep Diri dan Keterbukaan Diri di Kecamatan Tanjung Beringin Kabupaten Serdang Bedagai)

    OpenAIRE

    Lubis, Riza Fadla

    2015-01-01

    The Research title is Adolescent Psychological Communication Broken Home to Self-Concept and Self Disclosure: a research qualitative descriptive about Adolescent Psychological Communication Broken Home to Self-Concept and Self-Disclosure in Tanjung Beringin district, Serdang Bedagai regency, want to examine how the effect of a broken home to psychological communication , self-concept and self-disclosure for adolescent. The paradigm used in this research is an interpretive paradigm by using de...

  18. Objective structured clinical examination in radiology

    Directory of Open Access Journals (Sweden)

    Agarwal Anurag

    2010-01-01

    Full Text Available There is a growing need for introducing objective structured clinical examination (OSCE as a part of radiology practical examinations in India. OSCE is an established, reliable, and effective multistation test for the assessment of practical professional skills in an objective and a transparent manner. In India, it has been successfully initiated and implemented in specialties like pediatrics, ophthalmology, and otolaryngology. Each OSCE station needs to have a pre-agreed "key-list" that contains a list of objective steps prepared for uniformly assessing the tasks given to students. Broadly, OSCE stations are classified as "manned" or "unmanned" stations. These stations may include procedure or pictorial or theory stations with clinical oriented contents. This article is one of a series of measures to initiate OSCE in radiology; it analyzes the attributes of OSCE stations and outlines the steps for implementing OSCE. Furthermore, important issues like the advantages of OSCE, its limitations, a strengths, weaknesses, opportunities, and threats (SWOT analysis, and the timing of introduction of OSCE in radiology are also covered. The OSCE format in radiology and its stations needs to be validated, certified, and finalized before its use in examinations. This will need active participation and contribution from the academic radiology fraternity and inputs from faculty members of leading teaching institutions. Many workshops/meetings need to be conducted. Indeed, these collaborative measures will effectively sensitize universities, examiners, organizers, faculty, and students across India to OSCE and help successfully usher in this new format in radiology practical examinations.

  19. Objective structured clinical examination in radiology.

    Science.gov (United States)

    Agarwal, Anurag; Batra, Bipin; Sood, Ak; Ramakantan, Ravi; Bhargava, Satish K; Chidambaranathan, N; Indrajit, Ik

    2010-05-01

    There is a growing need for introducing objective structured clinical examination (OSCE) as a part of radiology practical examinations in India. OSCE is an established, reliable, and effective multistation test for the assessment of practical professional skills in an objective and a transparent manner. In India, it has been successfully initiated and implemented in specialties like pediatrics, ophthalmology, and otolaryngology. Each OSCE station needs to have a pre-agreed "key-list" that contains a list of objective steps prepared for uniformly assessing the tasks given to students. Broadly, OSCE stations are classified as "manned" or "unmanned" stations. These stations may include procedure or pictorial or theory stations with clinical oriented contents. This article is one of a series of measures to initiate OSCE in radiology; it analyzes the attributes of OSCE stations and outlines the steps for implementing OSCE. Furthermore, important issues like the advantages of OSCE, its limitations, a strengths, weaknesses, opportunities, and threats (SWOT) analysis, and the timing of introduction of OSCE in radiology are also covered. The OSCE format in radiology and its stations needs to be validated, certified, and finalized before its use in examinations. This will need active participation and contribution from the academic radiology fraternity and inputs from faculty members of leading teaching institutions. Many workshops/meetings need to be conducted. Indeed, these collaborative measures will effectively sensitize universities, examiners, organizers, faculty, and students across India to OSCE and help successfully usher in this new format in radiology practical examinations.

  20. Objective structured clinical examination in radiology

    Science.gov (United States)

    Agarwal, Anurag; Batra, Bipin; Sood, AK; Ramakantan, Ravi; Bhargava, Satish K; Chidambaranathan, N; Indrajit, IK

    2010-01-01

    There is a growing need for introducing objective structured clinical examination (OSCE) as a part of radiology practical examinations in India. OSCE is an established, reliable, and effective multistation test for the assessment of practical professional skills in an objective and a transparent manner. In India, it has been successfully initiated and implemented in specialties like pediatrics, ophthalmology, and otolaryngology. Each OSCE station needs to have a pre-agreed “key-list” that contains a list of objective steps prepared for uniformly assessing the tasks given to students. Broadly, OSCE stations are classified as “manned” or “unmanned” stations. These stations may include procedure or pictorial or theory stations with clinical oriented contents. This article is one of a series of measures to initiate OSCE in radiology; it analyzes the attributes of OSCE stations and outlines the steps for implementing OSCE. Furthermore, important issues like the advantages of OSCE, its limitations, a strengths, weaknesses, opportunities, and threats (SWOT) analysis, and the timing of introduction of OSCE in radiology are also covered. The OSCE format in radiology and its stations needs to be validated, certified, and finalized before its use in examinations. This will need active participation and contribution from the academic radiology fraternity and inputs from faculty members of leading teaching institutions. Many workshops/meetings need to be conducted. Indeed, these collaborative measures will effectively sensitize universities, examiners, organizers, faculty, and students across India to OSCE and help successfully usher in this new format in radiology practical examinations. PMID:20607015

  1. Spinning Particle as a Non-trivial Rotating Super Black Hole with Broken N=2 Supersymmetry

    CERN Document Server

    Burinskii, A

    1999-01-01

    A non-trivial super black hole solution is considered as representing a combined model of the Kerr spinning particle and superparticle. Treatment is based on the broken N=2 supersymmetry in supergravity in analogue with Deser-Zumino model of broken supersymmetry in N=1 supergravity. There appears a non-linear realization of broken supersymmetry, which is very specific for the Kerr geometry and which leads to a family of the exact non-trivial rotating and charged super black hole solutions (super-Kerr-Newman solutions). Peculiarities of the super-Kerr-Newman solutions and in particular the appearance of the short ranging traveling waves of torsion and other fields, build of the nilpotent Grassmann variables, on the pure bosonic Kerr-Newman background are discussed.

  2. Broken Bar Fault Detection in IM Operating Under No-Load Condition

    Directory of Open Access Journals (Sweden)

    RELJIC, D.

    2016-11-01

    Full Text Available This paper presents a novel method for broken rotor bar detection in a squirrel-cage induction motor (IM. The proposed method applies a single-phase AC voltage as a test signal on motor terminals, resulting in a stator backward-rotating magnetic field. The field ultimately causes additional current components in the stator windings whose magnitudes depend on the broken bar fault severity, even if the motor is unloaded. This allows robust broken bar fault detection based only on standard motor current signature analysis (MCSA technique. The proposed fault detection method is at first verified via simulations, using an IM model based on finite element analysis (FEA and multiple coupled circuit approach (MCCA. The subsequent experimental investigations have shown good agreement with both theoretical predictions and simulation results.

  3. Detection of broken rotor bar faults in induction motor at low load using neural network.

    Science.gov (United States)

    Bessam, B; Menacer, A; Boumehraz, M; Cherif, H

    2016-09-01

    The knowledge of the broken rotor bars characteristic frequencies and amplitudes has a great importance for all related diagnostic methods. The monitoring of motor faults requires a high resolution spectrum to separate different frequency components. The Discrete Fourier Transform (DFT) has been widely used to achieve these requirements. However, at low slip this technique cannot give good results. As a solution for these problems, this paper proposes an efficient technique based on a neural network approach and Hilbert transform (HT) for broken rotor bar diagnosis in induction machines at low load. The Hilbert transform is used to extract the stator current envelope (SCE). Two features are selected from the (SCE) spectrum (the amplitude and frequency of the harmonic). These features will be used as input for neural network. The results obtained are astonishing and it is capable to detect the correct number of broken rotor bars under different load conditions.

  4. Development and Application of Intelligent Prediction Software for Broken Rock Zone Thickness of Drifts

    Institute of Scientific and Technical Information of China (English)

    XU Guo-an; JING Hong-wen; LI Kai-ge; CHEN Kun-fu

    2005-01-01

    In order to seek the economical, practical and effective method of obtaining the thickness of broken rock zone, an emerging intelligent prediction method with adaptive neuro-fuzzy inference system (ANFIS) was introduced into the thickness prediction. And the software with functions of creating and applying prediction systems was developed on the platform of MATLAB6.5. The software was used to predict the broken rock zone thickness of drifts at Liangbei coal mine, Xinlong Company of Coal Industry in Xuchang city of Henan province. The results show that the predicted values accord well with the in situ measured ones. Thereby the validity of the software is validated and it provides a new approach to obtaining the broken zone thickness.

  5. Research on Detection Device for Broken Wires of Coal Mine-Hoist Cable

    Institute of Scientific and Technical Information of China (English)

    WANG Hong-yao; HUA Gang; TIAN Jie

    2007-01-01

    In order to overcome the flaws of present domestic devices for detecting faulty wires such as low precision, low sensitivity and instability, a new instrument for detecting and processing the signal of flux leakage caused by broken wires of coal mine-hoist cables is investigated. The principle of strong magnetic detection was adopted in the equipment. Wires were magnetized by a pre-magnetic head to reach magnetization saturation. Our special feature is that the number of flux-gates installed along the circle direction on the wall of sensors is twice as large as the number of strands in the wire cable. Neighboring components are connected in series and the interference on the surface of the wire cable, produced by leakage from the flux field of the wire strands, is efficiently filtered. The sampled signal sequence produced by broken wires, which is characterized by a three-dimensional distribution of the flux-leakage field on the surface of the wire cable, can be dimensionally condensed and characteristically extracted. A model of a BP neural network is built and the algorithm of the BP neural network is then used to identify the number of broken wires quantitatively. In our research, we used a 6×37+FC, Φ24 mm wire cable as our test object. Randomly several wires were artificially broken and damaged to different degrees. The experiments were carried out 100 times to obtain data for 100 groups from our samples. The data were then entered into the BP neural network and trained. The network was then used to identify a total 16 wires, broken at five different locations. The test data proves that our new device can enhance the precision in detecting broken and damaged wires.

  6. Experimental study on the type change of liquid flow in broken coal samples

    Institute of Scientific and Technical Information of China (English)

    Lu-zhen WANG; Zhan-qing CHEN; Hai-de SHEN

    2013-01-01

    A test system of the permeability of broken coal samples mainly consists of a CMT5305 electronic universal test machine,crushed rock compaction containing cylinder and a self-designed seepage circuit,which is composed of a gear pump,a reversing valve,a relief valve and other components.By using the steady penetration method,the permeability and non-Darcy flow β factor of broken coal samples under five different porosity levels were measured,the grain diameters of the coal samples were selected as 2.5-5 mm,5-10 mm,10-15 mm,15-20 mm,20-25 mm and 2.5-25 mm,respectively.After measuring the permeability under each porosity,the overfall pressure of the relief valve continuously increased until the coal sample was broken down.In this way,the flow type of liquid inside the broken coal samples changed from seepage to pipe flow.The correlation between breakdown pressure gradient (BPG) and porosity was analyzed,and the BPG was compared with the pressure gradient when seepage instability occurred.The results show that,① the non-Darcy flow β factor was negative before broken coal samples with six kinds of diameters were broken down; ② the BPG of coal samples with a grain size of 2.5-25 mm was lower than that of the others; ③ the BPG of coal samples with a single diameter under the same porosity increased as the grain size increased; ④ the BPG could be fitted by an exponential function with porosity,and the exponent decreased as the grain size increased for coal samples with a single diameter; ⑤ the BPG was slightly less than the seepage instability pressure gradient.The change in liquid flow type from seepage to pipe flow could be regarded as the performance of the seepage instability.

  7. Assessment of radiological protection systems among diagnostic radiology facilities in North East India.

    Science.gov (United States)

    Singh, Thokchom Dewan; Jayaraman, T; Arunkumar Sharma, B

    2017-03-01

    This study aims to assess the adequacy level of radiological protection systems available in the diagnostic radiology facilities located in three capital cities of North East (NE) India. It further attempts to understand, using a multi-disciplinary approach, how the safety codes/standards in diagnostic radiology framed by the Atomic Energy Regulatory Board (AERB) and the International Atomic Energy Agency (IAEA) to achieve adequate radiological protection in facilities, have been perceived, conceptualized, and applied accordingly in these facilities. About 30 diagnostic radiology facilities were randomly selected from three capitals of states in NE India; namely Imphal (Manipur), Shillong (Meghalaya) and Guwahati (Assam). A semi-structured questionnaire developed based on a multi-disciplinary approach was used for this study. It was observed that radiological practices undertaken in these facilities were not exactly in line with safety codes/standards in diagnostic radiology of the AERB and the IAEA. About 50% of the facilities had registered/licensed x-ray equipment with the AERB. More than 80% of the workers did not use radiation protective devices, although these devices were available in the facilities. About 85% of facilities had no institutional risk management system. About 70% of the facilities did not carry out periodic quality assurance testing of their x-ray equipment or surveys of radiation leakage around the x-ray room, and did not display radiation safety indicators in the x-ray rooms. Workers in these facilities exhibited low risk perception about the risks associated with these practices. The majority of diagnostic radiology facilities in NE India did not comply with the radiological safety codes/standards framed by the AERB and IAEA. The study found inadequate levels of radiological protection systems in the majority of facilities. This study suggests a need to establish firm measures that comply with the radiological safety codes/standards of the

  8. Implementing Quality Criteria in Designing and Conducting a Sequential Quan [right arrow] Qual Mixed Methods Study of Student Engagement with Learning Applied Research Methods Online

    Science.gov (United States)

    Ivankova, Nataliya V.

    2014-01-01

    In spite of recent methodological developments related to quality assurance in mixed methods research, practical examples of how to implement quality criteria in designing and conducting sequential QUAN [right arrow] QUAL mixed methods studies to ensure the process is systematic and rigorous remain scarce. This article discusses a three-step…

  9. Upper limit on the decay K{sup +}{r_arrow}e{sup +}{nu}{mu}{sup +}{mu}{sup {minus}}

    Energy Technology Data Exchange (ETDEWEB)

    Adler, S.; Atiya, M.S.; Chiang, I.; Frank, J.S.; Haggerty, J.S.; Kycia, T.F.; Li, K.K.; Littenberg, L.S.; Sambamurti, A.; Stevens, A.; Strand, R.C.; Witzig, C. [Brookhaven National Laboratory, Upton, New York 11973 (United States); Louis, W.C. [Medium Energy Physics Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545 (United States); Akerib, D.S.; Ardebili, M.; Convery, M.; Ito, M.M.; Marlow, D.R.; McPherson, R.; Meyers, P.D.; Selen, M.A.; Shoemaker, F.C.; Smith, A.J. [Joseph Henry Laboratories, Princeton University, Princeton, New Jersey 08544 (United States); Blackmore, E.W.; Bryman, D.A.; Felawka, L.; Konaka, A.; Kuno, Y.; Macdonald, J.A.; Numao, T.; Padley, P.; Poutissou, R. Poutissou, J.; Roy, J.; Turcot, A.S. [TRIUMF, Vancouver, British Columbia, V6T 2A3 (CANADA); Kitching, P.; Nakano, T.; Rozon, M.; Soluk, R. [Center for Subatomic Research, University of Alberta, Edmonton, Alberta, T6G 2N5 (CANADA)

    1998-07-01

    An upper limit on the branching ratio for the decay K{sup +}{r_arrow}e{sup +}{nu}{mu}{sup +}{mu}{sup {minus}} is set at 5.0{times}10{sup {minus}7} at a 90{percent} confidence level, consistent with predictions from chiral perturbation theory. {copyright} {ital 1998} {ital The American Physical Society}

  10. The head of a broken toothbrush in the parapharyngeal space: A rare case report.

    Science.gov (United States)

    Goswami, Saileswar

    2016-01-01

    While brushing her teeth, the toothbrush of a 4-year-old female child was broken, and about 5.4 cm of it including the head was left behind in her mouth. The head of the toothbrush penetrated the lateral pharyngeal wall and got strongly impacted into the left parapharyngeal space due to the presence of bristles. The broken end of the handle was just protruding into the pharynx and was very difficult to locate. It led to a life-threatening condition. The head of the toothbrush was removed safely by endoscopic approach and the patient recovered without any complication.

  11. Observation and elimination of broken symmetry in L1{sub 0} FePt nanostructures

    Energy Technology Data Exchange (ETDEWEB)

    Quarterman, P.; Wang, Hao; Qiu, Jiao-Ming; Ma, Bin; Liu, Xiaoqi; Wang, Jian-Ping, E-mail: jpwang@umn.edu [Department of Electrical and Computer Engineering and the Center for Micromagnetics and Information Technologies (MINT), University of Minnesota, Minnesota 55455 (United States); Guo, Honghua [Department of Optical Science and Engineering, Fudan University, Shanghai (China)

    2015-12-07

    An unexplained surface anisotropy effect was observed and confirmed in the magnetization reversal process of both L1{sub 0} phase FePt nanoparticles with octahedral shape and (001) textured L1{sub 0} FePt thin films with island nanostructures. We suggest that the nature of the observed surface effect is caused by broken symmetry on the FePt surface, which results in weakened exchange coupling for surface atoms. Furthermore, we propose, and experimentally demonstrate, a method to repair the broken symmetry by capping the FePt islands with a Pt layer, which could prove invaluable in understanding fundamental limitations of magnetic nanostructures.

  12. The Application of“Broken Window Theory”to College’s Daily Management

    Institute of Scientific and Technical Information of China (English)

    肖凤华

    2013-01-01

    The daily management of college on the one hand is to constrain the action of students to achieve the maintenance of school’s order and on the other hand is to help students develop good habits and remold certain concepts of laws, morality and discipline to finally achieve the goal of education. This paper employed a famous theory of management, that is, the“broken win⁃dow theory”in the research and finally concluded that the application of“broken window theory”in the daily management of colleges can immediately and effectively prevent some of students’bad behaviors and habits from being spread.

  13. Identification of new meteorite, Mihonoseki (L), from broken fragments in Japan

    Science.gov (United States)

    Miura, Y.; Noma, Y.

    1993-01-01

    New meteorite of Mihonoseki fallen in Shimane-ken was identified by fine broken pieces by using an energy-dispersive scanning electron microprobe analyzer. It shows fusion-crust (i.e. Fe-Si melt), meteoritic minerals (kamacite, taenite, troilite, amorphous plagioclase etc.) and chrondrule with clear glassy rim. Mineralogical, and petrological data of several fine grains suggest that broken fragments of Mihonoseki are L3/4 chondritic meteorite which is the first identification in a Japanese fallen meteorite. The prompt identification method of meteorite-fragments will be applied to the next lunar, Martian and asteroid explorations, as well as meteorite falls on the terrestrial surface.

  14. Decisiones óptimas de consumo y portafolio Un enfoque de precios de estado de Arrow-Debreu

    Directory of Open Access Journals (Sweden)

    Nora Gavira Durón

    2011-01-01

    Full Text Available Esta investigación desarrolla, bajo el supuesto de mercados completos, un modelo estocástico que explica el proceso de toma de decisiones de un consumidor-inversionista racional al seleccionar un portafolio en un ambiente de riesgo de mercado sujeto a su restricción presupuestal. El modelo propuesto se desarrolla en el marco de utilidad esperada del tipo Von Neumann-Morgenstern y precios de estado del tipo Arrow-Debreu en un horizonte de planeación infinito. Los principales resultados son: 1 la proporción que el individuo asigna de su riqueza a la tenencia del activo riesgoso es constante y 2 la estrategia óptima de consumo que el agente sigue es que siempre consume la misma proporción de su riqueza.

  15. Pregnancy screening of adolescents and women before radiologic testing: does radiology need a national guideline?

    Science.gov (United States)

    Applegate, Kimberly

    2007-08-01

    Ionizing radiation has known teratogenic and cancer risks to fetuses. Policies for radiation exposure of pregnant patients during imaging tests in radiology departments vary widely and may or may not be in fully written form. No national guideline exists for how individual radiologists or radiology departments should protect fetuses from ionizing radiation exposure. With the rapid increase in the use of radiologic testing in general, particularly computed tomography, more adolescents and women undergo computed tomographic imaging and may unintentionally expose their fetuses. A national discussion within radiology organizations is needed to understand the advantages and disadvantages in the development of a national guideline for screening women of childbearing age for pregnancy before any procedures using ionizing radiation are performed. Given the increased public concern and increased use of radiologic testing, such a national guideline would improve consumer satisfaction and safety.

  16. Health Economics in Radiology Departments

    Directory of Open Access Journals (Sweden)

    Shahram Tofighi

    2010-05-01

    Full Text Available Economics and management are disciplines which are theoretically interdependent and highly intercalated in practice. The manager develops main policies, values, goals and guidelines and at the same time suggests different ways achieving the objectives. The economist suggests the most efficient and effective way. As a matter of fact, there is no institution, for- or non-for-profit, in the world having no concern on economic and financial issues. While all institutions consider cost containment and revenue increase approaches, employing rational and mathematical techniques would be inevitable; systematic and approved tools and logics, undoubtedly would lead better results. The economics, having structured and logical framework, can handle these issues properly. In the economics, providers' and consumers' behaviors are analyzed, seeking the optimum points for demand and supply, and price. The health sector's leaders and policy makers are supposed to develop a situation appropriate for resource-directed and needs-driven behaviors, using legal, financial and other control knobs, the behaviors that eventually end distributive and utility equity in health services. "nAchieving equity in distribution of facilities concomitant with equity in availability and equity in utility are the main concerns of the people and the leaders of the societies. In addition, affordability of the health costs for the majority of the community, and financing for supposed services have led the policy makers to search for cost containment approaches, and some kind of rationing of the services. "nHealth economist deals with applying the two level economics in radiology departments. Micro-economics at the level of institutions, which discusses regulating processes and decisions in order to minimize the expenditures and maximize the revenues via a variety of initiatives, such as customer satisfaction and motivated staff, improving the processes, and reducing the

  17. Radiological response of ceramic and polymeric devices for breast brachytherapy

    Energy Technology Data Exchange (ETDEWEB)

    Batista Nogueira, Luciana, E-mail: lucibn19@yahoo.com.br [Departamento de Propedeutica Complementar, Faculdade de Medicina, Universidade Federal de Minas Gerais, Av. Antonio Carlos, 6627, Pampulha 31270901, BH/MG (Brazil); Passos Ribeiro de Campos, Tarcisio, E-mail: campos@nuclear.ufmg.br [Departamento de Engenharia Nuclear, Programa de Pos Graduacao em Ciencias e Tecnicas Nucleares, Universidade Federal de Minas Gerais, Av. Antonio Carlos, 6627, Pampulha 31270901, BH/MG (Brazil)

    2012-04-15

    In the present study, the radiological visibility of ceramic and polymeric devices implanted in breast phantom was investigated for future applications in brachytherapy. The main goal was to determine the radiological viability of ceramic and polymeric devices in vitro by performing simple radiological diagnostic methods such as conventional X-ray analysis and mammography due to its easy access to the population. The radiological response of ceramic and polymeric devices implanted in breast phantom was determined using conventional X-ray, mammography and CT analysis. - Highlights: Black-Right-Pointing-Pointer Radiological visibility of ceramic and polymeric devices implanted in breast phantom. Black-Right-Pointing-Pointer The barium incorporation in the seed improves the radiological contrast. Black-Right-Pointing-Pointer Radiological monitoring shows the position, orientation and degradation of devices. Black-Right-Pointing-Pointer Simple radiological methods such as X-ray and mammography were used for radiological monitoring.

  18. E-learning and education in radiology

    Energy Technology Data Exchange (ETDEWEB)

    Pinto, Antonio, E-mail: antopin1968@libero.it [Department of Diagnostic Imaging, A. Cardarelli Hospital, I-80131 Naples (Italy); Brunese, Luca, E-mail: lucabrunese@libero.it [Department of Health Science, Faculty of Medicine and Surgery, University of Molise, I-86100 Campobasso (Italy); Pinto, Fabio, E-mail: fpinto1966@libero.it [Department of Diagnostic Imaging, A. Cardarelli Hospital, I-80131 Naples (Italy); Acampora, Ciro, E-mail: itrasente@libero.it [Department of Diagnostic Imaging, A. Cardarelli Hospital, I-80131 Naples (Italy); Romano, Luigia, E-mail: luigia.romano@fastwebnet.it [Department of Diagnostic Imaging, A. Cardarelli Hospital, I-80131 Naples (Italy)

    2011-06-15

    Purpose: To evaluate current applications of e-learning in radiology. Material and methods: A Medline search was performed using PubMed (National Library of Medicine, Bethesda, MD) for publications discussing the applications of e-learning in radiology. The search strategy employed a single combination of the following terms: (1) e-learning, and (2) education and (3) radiology. This review was limited to human studies and to English-language literature. We reviewed all the titles and subsequent the abstract of 29 articles that appeared pertinent. Additional articles were identified by reviewing the reference lists of relevant papers. Finally, the full text of 38 selected articles was reviewed. Results: Literature data shows that with the constant development of technology and global spread of computer networks, in particular of the Internet, the integration of multimedia and interactivity introduced into electronic publishing has allowed the creation of multimedia applications that provide valuable support for medical teaching and continuing medical education, specifically for radiology. Such technologies are valuable tools for collaboration, interactivity, simulation, and self-testing. However, not everything on the World Wide Web is useful, accurate, or beneficial: the quality and veracity of medical information on the World Wide Web is variable and much time can be wasted as many websites do not meet basic publication standards. Conclusion: E-learning will become an important source of education in radiology.

  19. Conventional dental radiology; Konventionelle Dentalradiologie und Zukunftsperspektiven

    Energy Technology Data Exchange (ETDEWEB)

    Youssefzadeh, S.; Gahleitner, A. [Universitaetsklinik fuer Radiodiagnostik, Wien (Austria); Bernhart, D.; Bernhart, T. [Universitaetsklinik fuer Zahnheilkunde, Wien (Austria)

    1999-12-01

    Until recently, conventional dental radiology was performed by dentists and orofacial surgeons. Due to the rapid development of radiological technique, the demand of radiological advice is increasing. The radiologists see more and more dental patients in their daily routine. The aim of this article is to give an overview on established dental radiology and a glimpse into the future. Conventional dental radiology and digital radiography are presently in use. Intraoral technique comprises dental films, bite-wing views and occlusal radiographs. Panoramic views and cephalometric radiographs are done with extraoral technique. Digital radiography lacks all processes in behalf of film development. It leads to dose reduction and enables image manipulation. (orig.) [German] Die konventionelle Radiologie in der Zahnheilkunde (Dentalradiologie) wurde hauptsaechlich von den niedergelassenen Zahnaerzten und Mund-, Kiefer- und Gesichtschirurgen betrieben. Aufgrund der rasanten Entwicklung in der radiologischen Methodik wird die fachaerztliche Unterstuetzung durch den Radiologen immer notwendiger, und die raschen Fortschritte erfordern eine zunehmende Zusammenarbeit dieser medizinischen Faecher. Die fachspezifische Anforderung an den Radiologen tritt immer haeufiger im Routinebetrieb auf. Ziel dieses Artikels ist die Aufstellung der derzeit eingesetzten Technik sowie ein Ausblick in die nahe Zukunft. Prinzipiell wird zwischen der konventionellen Dentalradiologie und der digitalen Radiographie unterschieden. Die Dentalradiologie setzt sich aus der intraoralen Technik (Zahnfilme, Bissfluegelaufnahmen, Aufbissaufnahme) und der extraoralen Technik (Panoramaaufnahmen, Panoramaschichtaufnahmen, Fernroentgen) zusammen. Die digitale Radiographie ermoeglicht die Umgehung der konventionellen Entwicklungsverfahren, eine Strahlendosisreduktion und bietet die Moeglichkeit der Bildverarbeitung. (orig.)

  20. Eponyms in cardiothoracic radiology: Part I. Neoplasms.

    Science.gov (United States)

    Mohammed, Tan-Lucien H; Saettele, Megan R; Saettele, Timothy; Patel, Vikas; Kanne, Jeffrey P

    2014-01-01

    Eponyms serve the purpose of honoring individuals who have made important observations and discoveries. As with other fields of medicine, eponyms are frequently encountered in radiology, particularly in chest radiology. However, inappropriate use of an eponym may lead to potentially dangerous miscommunication. Moreover, an eponym may honor the incorrect person or a person who falls into disrepute. Despite their limitations, eponyms are still widespread in medical literature. Furthermore, in some circumstances, more than one individual may have contributed to the description or discovery of a particular anatomical structure or disease, whereas in others, an eponym may have been incorrectly applied initially and propagated for years in medical literature. Nevertheless, radiologic eponyms are a means of honoring those who have made lasting contributions to the field of radiology, and familiarity with these eponyms is critical for proper reporting and accurate communication. In addition, the acquisition of some historical knowledge about those whose names are associated with various structures or pathologic conditions conveys a sense of humanity in the field of medicine. In this article, the first of a multipart series, the authors discuss a number of chest radiology eponyms as they relate to neoplasms, including relevant clinical and imaging features, as well biographic information of the respective eponym׳s namesake.

  1. A Proposed Model of Optimality Theory for Jordanian Arabic Broken Plurals

    Science.gov (United States)

    Sakarna, Ahmad Khalaf

    2013-01-01

    One of the most challenging, but rather interesting, topics in the literature of Arabic phonology and morphology is the broken plurals (BP). The most widely acceptable account of Arabic BP, as far as I know, is McCarthy (1982) within the framework of Autosegmental Phonology. This paper presents and discusses the model of McCarthy (1982) and shows…

  2. Another Look at the Relationship between the Broken Home and Juvenile Delinquency.

    Science.gov (United States)

    Free, Marvin D., Jr.

    Inadequate samples, methodological deficiencies, and inadequate measures of delinquency and family structure have contributed to the confusion regarding the relationship between the broken home and delinquency. This investigation, seeking to overcome many of the deficiencies of earlier research, used a large, geographically diverse sample, a…

  3. Correlation and disorder-enhanced nematic spin response in superconductors with weakly broken rotational symmetry

    DEFF Research Database (Denmark)

    Andersen, Brian Møller; Graser, S.; Hirschfeld, P. J.

    2012-01-01

    Recent experimental and theoretical studies have highlighted the possible role of an electronic nematic liquid in underdoped cuprate superconductors. We calculate, within a model of d-wave superconductor with Hubbard correlations, the spin susceptibility in the case of a small explicitly broken...

  4. Broken wing display in an unfledged Indian Eagle Owl Bubo bengalensis

    Directory of Open Access Journals (Sweden)

    M.E. Ramanujam

    2014-05-01

    Full Text Available A young Bubo bengalensis was encountered in a ravine near Ousteri Lake. It was monitored for a period of 6 months. During this period it showed the broken wing display only once, which is considered to be exclusive to adults in defense of their nests, eggs, or young.

  5. The influence of endodontic broken stainless steel instruments on the urinary levels of iron.

    Science.gov (United States)

    Saghiri, Mohammad Ali; Asatourian, Armen; Haraji, Afshin; Ramezani, Golam H; Garcia-Godoy, Franklin; Scarbecz, Mark; Sheibani, Nader

    2014-06-01

    Previous studies on the endodontic broken stainless steel instruments have mainly focused on retrieval of specimens. However, the systemic consequences of the retained separated instruments need an investigation. The current study aimed to evaluate the correlation between broken stainless steel instruments inside the root canal space and the urinary level of iron (Fe) in patients. Sixty near-aged and same-gender patients were selected. Thirty patients in the control group had no endodontic treatment in their history, while the other 30 patients in the endodontic group had broken stainless steel instrument. The urine samples were collected in iron-free containers. All specimens were refrigerated for 1 day and then subjected to Fe level measurement by electrothermal atomic absorption spectrometry. Data were analyzed by Kolmogorov-Smirnov and t tests at P  0.05). There was a positive correlation between age and Fe levels of endodontic and control groups. However, the joint effects of age and sex on Fe levels were different for the two groups. The presence of broken stainless steel instruments inside the root canal space did not elevate the level of Fe in the urine of patients. However, this value was positively correlated with the patient age.

  6. Single-borehole measuring method for broken rock zone in gently inclined thin layer weakness structure

    Institute of Scientific and Technical Information of China (English)

    CHEN Qing-fa; ZHOU Ke-ping; LONG Teng-teng; GAO Feng

    2008-01-01

    According to the structural characteristics of gently inclined thin layer rock mass in which lots of weak interlayer existed, the concept of gently inclined thin layer weakness structure was proposed. If single-borehole measuring method of the acoustic along the conventional arrangement mode was used in measuring the broken rock zone in this structure, the change of the relationship curves (Vp-L) between acoustic p-wave velocity (Vp) and borehole depth (L) would present the irregular feature due to the mechanical characteristics of layered rock mass and harmful effects of weak interlayers, and the scope of broken rock zone couldn't be defined quickly. Based on the analysis of the mechanical characteristics of layered rock mass, the propagation rule of acoustic and distributions characteristics of plastic zone and slip zone in layered rock mass, new arrangement mode of acoustic measuring boreholes for broken rock zone in gently inclined thin layer weakness structure was proposed. Namely, the measuring boreholes in two sides were parallel to the strata, the measuring boreholes in the roof and floor perpendicular to the strata. Besides the controlling depth of the measuring boreholes in the scope of the large plastic zones or the large slip zones should be increased. Engineering exampleshowed that new acoustic measuring boreholes arrangement mode had the better applicability and could determine the scope of the broken rock zone in the gently inclined thin layer weakness structure quickly.

  7. Perinipple Broken Line Incision:a Novel Approach for Breast Augmentation

    Institute of Scientific and Technical Information of China (English)

    Zhi-fei Liu

    2015-01-01

    Objective To investigate reliability of the infra-nipple broken line incision for breast augmentation. Methods From January 2012 to January 2013, 15 patients underwent primary bilateral retromuscular breast augmentation with round textured silicone-gel implants and a novel infra-nipple broken line incision. Preoperatively, a semicircular incision was marked along the inferior base of the nipple. It was then extended bilaterally using two transverse right-angled geometric broken lines within the pigmented areolar skin. Follow-up was performed to evaluate the sensation of nipple-areolar complex, the scar, and the shape and texture of the breasts. Results The average follow-up was 6.7 months. Most of the patients complained of paresthesia of the nipple or breast skin, but transient decreased sensation improved within 3 months. No patients showed permanent sensory changes of the nipple areolar complex at a minimum follow-up of 4 months. The scars were imperceptible in all patients. Conclusion We believe that for selected patients, the infra-nipple broken line incision is a practical and reliable method to achieve aesthetic result.

  8. Classical Kinetic Theory of Landau Damping for Self-interacting Scalar Fields in the Broken Phase

    OpenAIRE

    1998-01-01

    The classical kinetic theory of one-component self-interacting scalar fields is formulated in the broken symmetry phase and applied to the phenomenon of Landau damping. The domain of validity of the classical approach is found by comparing with the result of a 1-loop quantum calculation.

  9. Broken symmetries at high temperatures and the problem of baryon excess of the universe

    CERN Document Server

    Mohapatra, Rabindra N

    1979-01-01

    We discuss a class of gauge theories, where spontan- eously broken symmetries, instead of being restored, persist as the temperature is increased. Applying these ideas to the specific case of the soft CP- viola tion in grand unified theories, we discuss a mechanism to generate the baryon to entropy ratio of the universe.

  10. Broken heart, tako-tsubo or stress cardiomyopathy? Metaphors, meanings and their medical impact.

    Science.gov (United States)

    Efferth, Thomas; Banerjee, Mita; Paul, Norbert W

    2017-03-01

    The cardiac impact of psychological stress historically and socially understood as boundary experiences of human life has long since become an icon. From the aching heart to the sudden death provoked by awe, horror, grief, anger, and humiliation on one side and extreme enchantment, enthusiasm, and excitement on the other, the broken heart has become a globally recognized and powerful metaphor present from folklore to popular culture to high literature and back to everyday communication. In medicine, the "broken heart syndrome" is described as a relatively new nosological entity that has been used synonymously with the term tako-tsubo or stress cardiomyopathy. Among those three terms, however, the broken heart most vividly draws the connection between conditions under which lived experience triggers cardiac damage and conversely, cardiovascular death occurs. According to Hassan and Yamasaki (2013) [1] and quite apart from the general perception medical notions of the broken heart indeed go back to at least 1967, when Rees and Lutkins studied the death rate among 903 relatives of patients who died in Wales. They found that 4.8% of bereaved close relatives died within a year of bereavement compared with 0.68% of a non-bereaved control group. Among widows and widowers, the mortality rate was even 10 times greater than that of the matched controls. After the first year of bereavement, however, mortality rates of relatives of a deceased person did not differ significantly from the control group Rees and Lutkins (1967) [2]. Similar findings were published by Parkes et al. (1969) [3] following up on 4486 widowers at the age of 55 for 9years following the death of their wives in 1957. During the first six months after the spouse had died, the mortality rate of the widowers was 40% above the rate of married men of the same age. While it seems plausible to accept the etiological role and pathogenic impact of personal loss, the pathogenic processes causing death remained

  11. Image Sharing in Radiology-A Primer.

    Science.gov (United States)

    Chatterjee, Arindam R; Stalcup, Seth; Sharma, Arjun; Sato, T Shawn; Gupta, Pushpender; Lee, Yueh Z; Malone, Christopher; McBee, Morgan; Hotaling, Elise L; Kansagra, Akash P

    2017-03-01

    By virtue of its information technology-oriented infrastructure, the specialty of radiology is uniquely positioned to be at the forefront of efforts to promote data sharing across the healthcare enterprise, including particularly image sharing. The potential benefits of image sharing for clinical, research, and educational applications in radiology are immense. In this work, our group-the Association of University Radiologists (AUR) Radiology Research Alliance Task Force on Image Sharing-reviews the benefits of implementing image sharing capability, introduces current image sharing platforms and details their unique requirements, and presents emerging platforms that may see greater adoption in the future. By understanding this complex ecosystem of image sharing solutions, radiologists can become important advocates for the successful implementation of these powerful image sharing resources.

  12. Radiologic investigation after laparoscopic inguinal hernia repair

    Energy Technology Data Exchange (ETDEWEB)

    Larmark, Martin; Ekberg, Olle [Department of Diagnostic Radiology, Malmoe University Hospital, 205 02, Malmoe (Sweden); Montgomery, Agneta [Department of Surgery, Malmoe University Hospital, 205 02, Malmoe (Sweden)

    2003-12-01

    Laparoscopic instead of open surgical repair of inguinal hernias is becoming more frequent. Radiologists may expect different postoperative findings depending on the technique used. We studied how radiology had been used postoperatively and what findings were encountered after laparoscopic herniorraphy. Postoperative radiologic examinations related to hernia repair of all consecutive patients that had had laparoscopic herniorraphy in Malmoe University hospital between 1992 and 1998 were retrospectively evaluated. A total of 538 groins were included, 3.9% (n=21) of these were postoperatively examined with ultrasound (n=10), herniography (n=7), plain abdominal films (n=2), CT (n=1), or fistulography (n=1). Significant findings were found in five groins, namely, one sinus tract, two hematomas, one small bowel obstruction, and one recurrence of hernia. Four insignificant seromas were found. The characteristics of the findings and pitfalls are described. Symptoms resulting in radiologic examination are rare after laparoscopic herniorraphy. The radiologist must be familiar with the spectrum of such findings. (orig.)

  13. Science and Values in Radiological Protection

    Energy Technology Data Exchange (ETDEWEB)

    Lochard, J. [Centre d' Etude sur l' Evaluation de la Protection dans le Domaine Nucleaire (CEPN), 92 - Fontenay-aux-Roses (France); Eggermont, G. [Belgian Association of Radiation Protection (Belgium); Britt-Marie, Drottz Sjoberg [Norwegian University of Science and Technology (Norway); Tirmarche, M. [Institut de radioprotection et de surete nucleaire (IRSN), 92 - Fontenay-aux-Roses (France); Geard, Ch.R. [Center for Radiological Research of Columbia University (United States); Atkinson, M. [Institute of Radiation Biology, Helmholtz Zentrum Munich (Germany); Murith, Ch. [Federal Office of Public Health (Switzerland); Grant, K.G. [RESOLVE (United States); Luccioni, C. [Conservatoire National des Arts et Metiers (CNAM), 75 - Paris (France); Mays, C. [NEA, 75 - Paris (France); Sisko, Salomaa [Finnish Centre for Radiation and Nuclear Safety (STUK), Helsinki (Finland); Kelly, N.G.; Oughton, D. [Norwegian University of Life Sciences (Norway); Shannoun, F. [WHO, Geneva (Switzerland); Grant, K.G. [RESOLVE (United States); Cooper, J. [Health Protection Agency (United Kingdom); Mays, C. [NEA, 75 - Paris (France); Weiss, V. [Bundesamt fur Strahlenschutz (Germany); Oughton, D. [Norwegian University of Life Sciences (Norway); Kazuo, Sakai [National Institute of Radiological Science (Japan); Carroll, S. [Swedish Biodiversity Centre, University of Agricultural Sciences and Uppsala University (Sweden)

    2010-07-01

    The workshop provides a forum for exchange of information and experience among regulators, scientists and governmental and non-governmental organisations in the areas of radiological protection and public health. This is the second in the series of NEA workshops on this subject. The first Science and Values in Radiological Protection workshop was held in Helsinki in January 2008 and hosted by the Radiation and Nuclear Safety Authority of Finland (STUK). The workshop focussed on developing a shared understanding between various stakeholders and identifying the elements of a framework more suited to the integration of new scientific and technological developments and socio-political considerations in radiological protection. This second workshop focusses on radiological protection issues that are currently facing us, and that continue to pose challenges to our world today. This document gathers the available slides of the presentations given at the workshop: - Science and Values in Radiological Protection: Towards a Framework (Jacques Lochard): This talk makes the link with the Science and Values in Radiological Protection workshop in Helsinki, and lay out the overall goals of the present workshop. It explains the format of plenary/break-out sessions. - Public Health Perspective in Radiological Protection in Challenging Topical Areas (Gilbert Eggermont): This talk gives more detail on the choice of the three case topics and the linkage to public health concerns in radiological protection. It makes a specific link with Helsinki workshop findings and the CRPPH Expert Group on the Public Health. Perspective in Radiological Protection work. - Civil Society Needs (Britt-Marie Drottz Sjoeberg): This talk briefly reviews the radiation protection concerns and communication needs of civil society. It points out different categories of stakeholders and their understanding of radiation risks implied by the three case topics. It addresses the question of how radiological

  14. Radiologic Imaging in Meckel Diverticulum Complications

    Directory of Open Access Journals (Sweden)

    Erin Leslee Dames

    2015-09-01

    Full Text Available In 1809, Johann Friedrich Meckel the Younger described the most common congenital small bowel anomaly, which was named after him; however, the radiologic manifestations and interventional guidelines related to this entity are still limited to a few large-scale case series as well as proposed therapeutic protocols for the general population. Despite the fact that this entity is more commonly found within the first decade of life, imaging and management protocols remain controversial in the pediatric population, particularly within the asymptomatic group. We present an article depicting the radiologic and histologic findings in a series of Meckel's diverticulum within the pediatric population seen within our institution. We present this series to underscore the importance of high clinical suspicion in the early diagnosis and management of Meckel's diverticulum and to examine further the radiologic and therapeutic protocols within the pediatric population based on our local experience.

  15. Routine Radiological Environmental Monitoring Plan. Volume 1

    Energy Technology Data Exchange (ETDEWEB)

    Bechtel Nevada

    1999-12-31

    The U.S. Department of Energy manages the Nevada Test Site in a manner that meets evolving DOE Missions and responds to the concerns of affected and interested individuals and agencies. This Routine Radiological Monitoring Plan addressess complicance with DOE Orders 5400.1 and 5400.5 and other drivers requiring routine effluent monitoring and environmental surveillance on the Nevada Test Site. This monitoring plan, prepared in 1998, addresses the activities conducted onsite NTS under the Final Environmental Impact Statement and Record of Decision. This radiological monitoring plan, prepared on behalf of the Nevada Test Site Landlord, brings together sitewide environmental surveillance; site-specific effluent monitoring; and operational monitoring conducted by various missions, programs, and projects on the NTS. The plan provides an approach to identifying and conducting routine radiological monitoring at the NTS, based on integrated technical, scientific, and regulatory complicance data needs.

  16. Interventional Radiology of Male Varicocele: Current Status

    Energy Technology Data Exchange (ETDEWEB)

    Iaccarino, Vittorio, E-mail: vittorio.iaccarino@unina.it; Venetucci, Pietro [University of Naples ' Federico II' , Diagnostic Imaging Department-Cardiovascular and Interventional Radiology, School of Medicine (Italy)

    2012-12-15

    Varicocele is a fairly common condition in male individuals. Although a minor disease, it may cause infertility and testicular pain. Consequently, it has high health and social impact. Here we review the current status of interventional radiology of male varicocele. We describe the radiological anatomy of gonadal veins and the clinical aspects of male varicocele, particularly the physical examination, which includes a new clinical and ultrasound Doppler maneuver. The surgical and radiological treatment options are also described with the focus on retrograde and antegrade sclerotherapy, together with our long experience with these procedures. Last, we compare the outcomes, recurrence and persistence rates, complications, procedure time and cost-effectiveness of each method. It clearly emerges from this analysis that there is a need for randomized multicentre trials designed to compare the various surgical and percutaneous techniques, all of which are aimed at occlusion of the anterior pampiniform plexus.

  17. Autoimmune pancreatitis mimicking Klatskin tumour on radiology.

    Science.gov (United States)

    Hadi, Yousaf Bashir; Sohail, Abdul Malik Amir Humza; Haider, Zishan

    2015-04-09

    Autoimmune pancreatitis (AIP) is categorised into two distinct types, AIP type 1 and 2. Although there can be multisystem involvement, rarely, the cholangitis associated with AIP can present radiologically in a manner similar to that of Klatskin tumour. We present the case of a 65-year-old man who was almost misdiagnosed with a Klatskin tumour because of the similarity in radiological features of the two aforementioned clinical entities. The patient presented with a history of jaundice, pruritus and abdominal pain, and work up showed deranged liver function tests, elevated cancer antigen 19-9 levels and positive antinuclear antibodies. CT scan of the abdomen showed findings suggestive of Klatskin tumour but due to diffuse enlargement of the pancreas and surrounding low-attenuation halo found on a closer review, a diagnosis of AIP was performed. The patient was started on standard corticosteroid therapy and responded well, with complete resolution of the radiological findings.

  18. The quantum X-ray radiology apparatus

    CERN Document Server

    Hilt, B; Prevot, G

    2000-01-01

    The paper entitled 'New Quantum Detection System for Very Low Dose X-ray Radiology', presented at the talk session, discusses the preliminary data obtained using a new quantum X-ray radiology system with a high-efficiency solid-state detector and highly sensitive electronics, making it possible to reduce significantly the dose administered to a patient in X-ray radiology examinations. The present paper focuses more on the technological aspects of the apparatus, such as the integration of the detector with the two Asics, and the computer system. Namely, it is shown how the computer system calibrates the detection system, acquires the data in real time, and controls the scan parameters and image filtering process.

  19. ICRP PUBLICATION 120: Radiological protection in cardiology.

    Science.gov (United States)

    Cousins, C; Miller, D L; Bernardi, G; Rehani, M M; Schofield, P; Vañó, E; Einstein, A J; Geiger, B; Heintz, P; Padovani, R; Sim, K-H

    2013-02-01

    Cardiac nuclear medicine, cardiac computed tomography (CT), interventional cardiology procedures, and electrophysiology procedures are increasing in number and account for an important share of patient radiation exposure in medicine. Complex percutaneous coronary interventions and cardiac electrophysiology procedures are associated with high radiation doses. These procedures can result in patient skin doses that are high enough to cause radiation injury and an increased risk of cancer. Treatment of congenital heart disease in children is of particular concern. Additionally, staff(1) in cardiac catheterisation laboratories may receive high doses of radiation if radiological protection tools are not used properly. The Commission provided recommendations for radiological protection during fluoroscopically guided interventions in Publication 85, for radiological protection in CT in Publications 87 and 102, and for training in radiological protection in Publication 113 (ICRP, 2000b,c, 2007a, 2009). This report is focused specifically on cardiology, and brings together information relevant to cardiology from the Commission's published documents. There is emphasis on those imaging procedures and interventions specific to cardiology. The material and recommendations in the current document have been updated to reflect the most recent recommendations of the Commission. This report provides guidance to assist the cardiologist with justification procedures and optimisation of protection in cardiac CT studies, cardiac nuclear medicine studies, and fluoroscopically guided cardiac interventions. It includes discussions of the biological effects of radiation, principles of radiological protection, protection of staff during fluoroscopically guided interventions, radiological protection training, and establishment of a quality assurance programme for cardiac imaging and intervention. As tissue injury, principally skin injury, is a risk for fluoroscopically guided interventions

  20. Relationship between Broken Homes and Academic Achievement of Secondary School Students in Oredo Local Government Area of Edo State, Nigeria

    Science.gov (United States)

    Alika, Henrietta Ijeoma; Edosa, Ogboro Samson

    2012-01-01

    The study investigated the relationship between broken homes and academic achievement of students. Three research hypotheses were formulated to guide the study. The study was correlational because the study sought to establish the extent of relationship between broken homes and academic achievement. The statistical method used in analyzing the…

  1. A Lean Six Sigma journey in radiology.

    Science.gov (United States)

    Bucci, Ronald V; Musitano, Anne

    2011-01-01

    The department of radiology at Akron Children's Hospital embarked on a Lean Six Sigma mission as part of a hospital wide initiative to show increased customer satisfaction, reduce employee dissatisfaction and frustration, and decrease costs. Three processes that were addressed were reducing the MRI scheduling back-log, reconciling discrepancies in billing radiology procedures, and implementing a daily management system. Keys to success is that managers provide opportunities to openly communicate between department sections to break down barriers. Executive leaders must be engaged in Lean Six Sigma for the company to be successful.

  2. Dento-maxillofacial radiology as a specialty

    Institute of Scientific and Technical Information of China (English)

    K?van?; Kamburo?lu

    2015-01-01

    This editorial discusses a relatively new specialty in dental and medical field namely dentomaxillofacial radiology. As a relatively newborn specialty it is obvious that there is a long way to go before dentomaxillofacial radiology is commonly known and respected by the society. All over the world, assigned committees work on the development of the training curriculum, determination of scientific and physical standards for institutions offering specialty training and arrangement of dental codes for reimbursement issues. Furthermore, adjustment of educational, scientific and legal regulations and prospective benefits are expected to boost this specialty’s attractiveness to colleagues’ worldwide.

  3. Review on radiation protection in diagnostic radiology

    Directory of Open Access Journals (Sweden)

    Vahid Karami

    2016-10-01

    Full Text Available Discovery of x-ray and using of it for medical imaging have produced tremendous outcomes for diagnosis and treatment of diseases. More than 10 million diagnostic radiological procedures and 100,000 nuclear medicine exams are being performed daily around the world. According to the national commission on radiological protection and measurements (NCRP-report 160, medical x-ray is contribute to approximately 95% of all radiological examinations that is responsible for 74% of the collective dose to the US population. Despite of unique benefits of ionizing radiations, in the field of radiation protection, they are associated with potential risks such as cancer and genetically abnormalities. The cancer risk attributable to diagnostic radiology is estimated about 0.6% to 3%. It is estimated that the radiation dose from diagnostic x-ray procedures are annually responsible for 7,587 and 5,695 cases of radiation induced cancer in the population of Japan and US, respectively. Although the radiation dose associated with most radiological procedures are very low, but rapid increasing use of radiography procedures during two past decades have been concerned due to the cancer risk associated with ionizing radiations. On the base of linear no-threshold (LNT model of dose-response curve, any level of exposure is dangerous. Deoxyribonucleic acid (DNA is the main target of ionizing radiation. For radiological exposure with low dose, the stochastic effects such as genetic damages and leukemia are concerned. According to the recommendations of the radiation protection regulatory organizations, radiological procedure must be done with respect to social and economic factors in which exposure of patient and population kept as low as reasonable and achievable. Hence, prescription of a radiological test is acceptable only when its advantages are higher than its damages. Optimizing the different parameters such as: collimating the primary beam field to the area of

  4. Radiological information management system SRIM-10

    Energy Technology Data Exchange (ETDEWEB)

    Shibata, Koichi; Goto, Yoshihisa

    1989-03-01

    A radiological information management system, SRIM-10, has been developed using a personal computer, in order to smoothly manage routine works in radiological division of hospitals. Data base is constructed with radiographic data acuqired directly from x-ray apparatus and patient information acquired using ID card. It is possible to record patient information of about 10,000 patients and radiographic data of about 120,000 exposures. This system can be made up as a multi work station system using a local area network. (author).

  5. Medical Ethics and Law in Radiologic Technology.

    Science.gov (United States)

    Matthews, Eric P; Matthews, Tracy M

    2015-01-01

    At every stage of their careers, radiologic technologists and student technologists must adhere to high ethical standards, obey the law, and consistently conduct themselves with professionalism. This article explains how modern health care ethics evolved, focusing on 8 important theorists. It also describes the ethical responsibilities of health care providers and the rights of patients. Important civil rights laws are discussed, focusing on the rights of health care workers as employees. A brief overview of the U.S. legal system follows, including the causes of action that most commonly involve health care professionals. Finally, this article discusses professionalism and its implications for radiologic technologists.

  6. Extracting diagnosis from Japanese radiological report.

    Science.gov (United States)

    Imai, Takeshi; Onogi, Yuzo

    2003-01-01

    This study is aimed at extracting diagnosis with positive or negative assertion from radiological report written in Japanese Natural Language. We get frequency of verb patterns that indicate pos/neg assertion, and extract a rule in order of the occurrence. We made customized dictionary of 36,152 terms relating to disease names or radiological findings, and tried to extract pairs of (pos/neg, disease and verb pattern ) by using rules according to the most frequent pattern from 1,524/5,000 CT reports (each report consists of 15.1 words on the average). We tried only a few rules so far, and continue to find other rules.

  7. Early radiology and the National Medical Association.

    Science.gov (United States)

    Oestreich, Alan E

    2011-01-01

    Both the discovery of the x-ray and the founding of the National Medical Association (NMA) occurred in 1895. Radiologists have participated importantly in the NMA since the lecture of Dr Marcus F. Wheatland at the 1909 Annual Meeting in Boston, Massachusetts, which led to his election as president of the NMA for the following year. More recently, Dr Tracy M. Walton was president of the NMA in its centennial year. This article details early and continued participation in the NMA by radiologists, including the founding of the Section on Radiology in 1949, with its first chairman, Dr William E. Allen, Jr, longtime leader in radiology, the section, and the NMA.

  8. Virtual radiology rounds: adding value in the digital era

    Energy Technology Data Exchange (ETDEWEB)

    Fefferman, Nancy R.; Strubel, Naomi A.; Prithiani, Chandan; Chakravarti, Sujata; Caprio, Martha; Recht, Michael P. [New York University School of Medicine, Department of Radiology, New York, NY (United States)

    2016-11-15

    To preserve radiology rounds in the changing health care environment, we have introduced virtual radiology rounds, an initiative enabling clinicians to remotely review imaging studies with the radiologist. We describe our initial experience with virtual radiology rounds and referring provider impressions. Virtual radiology rounds, a web-based conference, use remote sharing of radiology workstations. Participants discuss imaging studies by speakerphone. Virtual radiology rounds were piloted with the Neonatal Intensive Care Unit (NICU) and the Congenital Cardiovascular Care Unit (CCVCU). Providers completed a survey assessing the perceived impact and overall value of virtual radiology rounds on patient care using a 10-point scale. Pediatric radiologists participating in virtual radiology rounds completed a survey assessing technical, educational and clinical aspects of this methodology. Sixteen providers responded to the survey; 9 NICU and 7 CCVCU staff (physicians, nurse practitioners and fellows). Virtual radiology rounds occurred 4-5 sessions/week with an average of 6.4 studies. Clinicians rated confidence in their own image interpretation with a 7.4 average rating for NICU and 7.5 average rating for CCVCU. Clinicians unanimously rated virtual radiology rounds as adding value. NICU staff preferred virtual radiology rounds to traditional rounds and CCVCU staff supported their new participation in virtual radiology rounds. Four of the five pediatric radiologists participating in virtual radiology rounds responded to the survey reporting virtual radiology rounds to be easy to facilitate (average rating: 9.3), to moderately impact interpretation of imaging studies (average rating: 6), and to provide substantial educational value for radiologists (average rating: 8.3). All pediatric radiologists felt strongly that virtual radiology rounds enable increased integration of the radiologist into the clinical care team (average rating: 8.8). Virtual radiology rounds are a

  9. Radiological Characterization and Final Facility Status Report Tritium Research Laboratory

    Energy Technology Data Exchange (ETDEWEB)

    Garcia, T.B.; Gorman, T.P.

    1996-08-01

    This document contains the specific radiological characterization information on Building 968, the Tritium Research Laboratory (TRL) Complex and Facility. We performed the characterization as outlined in its Radiological Characterization Plan. The Radiological Characterization and Final Facility Status Report (RC&FFSR) provides historic background information on each laboratory within the TRL complex as related to its original and present radiological condition. Along with the work outlined in the Radiological Characterization Plan (RCP), we performed a Radiological Soils Characterization, Radiological and Chemical Characterization of the Waste Water Hold-up System including all drains, and a Radiological Characterization of the Building 968 roof ventilation system. These characterizations will provide the basis for the Sandia National Laboratory, California (SNL/CA) Site Termination Survey .Plan, when appropriate.

  10. Childhood hydrocephalus – is radiological morphology associated with etiology

    DEFF Research Database (Denmark)

    Foss-Skiftesvik, Jon; Andresen, Morten; Juhler, Marianne

    2013-01-01

    Clinicians use a non-standardized, intuitive approach when correlating radiological morphology and etiology of hydrocephalus.......Clinicians use a non-standardized, intuitive approach when correlating radiological morphology and etiology of hydrocephalus....

  11. Comparison of toxicological and radiological aspects of K basins sludge

    Energy Technology Data Exchange (ETDEWEB)

    RITTMANN, P.D.

    1999-10-27

    The composition of various K Basins sludge is evaluated for its toxicological and radiological impacts downwind from accidents. It is shown that the radiological risk evaluation guidelines are always more limiting than the toxicological risk evaluation guidelines.

  12. Broken Leg

    Science.gov (United States)

    ... bones from physical activities, such as: Running Ballet dancing Basketball Marching Contact sports, such as hockey and ... pain, your doctor might prescribe stronger pain medications. Therapy After your cast or splint is removed, you' ...

  13. Broken Ties

    Science.gov (United States)

    Gray, Katti

    2009-01-01

    As the number of people choosing to marry has plunged during recent decades, the tally of children living with one parent and having limited or no contact with the other has soared. Attuned to the hazards that such separations impose upon children but also upon parents who, studies show, fare physically and emotionally better in a thriving…

  14. Broken Nose

    Science.gov (United States)

    ... N.Y.: The McGraw-Hill Companies; 2011. http://accessmedicine.mhmedical.com/content.aspx?bookid=385&Sectionid=40357238. ... N.Y.: The McGraw-Hill Companies; 2010. http://accessmedicine.mhmedical.com/content.aspx?bookid=343&Sectionid=39702829. ...

  15. Intelligent image retrieval based on radiology reports

    Energy Technology Data Exchange (ETDEWEB)

    Gerstmair, Axel; Langer, Mathias; Kotter, Elmar [University Medical Center Freiburg, Department of Diagnostic Radiology, Freiburg (Germany); Daumke, Philipp; Simon, Kai [Averbis GmbH, Freiburg (Germany)

    2012-12-15

    To create an advanced image retrieval and data-mining system based on in-house radiology reports. Radiology reports are semantically analysed using natural language processing (NLP) techniques and stored in a state-of-the-art search engine. Images referenced by sequence and image number in the reports are retrieved from the picture archiving and communication system (PACS) and stored for later viewing. A web-based front end is used as an interface to query for images and show the results with the retrieved images and report text. Using a comprehensive radiological lexicon for the underlying terminology, the search algorithm also finds results for synonyms, abbreviations and related topics. The test set was 108 manually annotated reports analysed by different system configurations. Best results were achieved using full syntactic and semantic analysis with a precision of 0.929 and recall of 0.952. Operating successfully since October 2010, 258,824 reports have been indexed and a total of 405,146 preview images are stored in the database. Data-mining and NLP techniques provide quick access to a vast repository of images and radiology reports with both high precision and recall values. Consequently, the system has become a valuable tool in daily clinical routine, education and research. (orig.)

  16. Diagnostic radiology dosimetry: status and trends

    Energy Technology Data Exchange (ETDEWEB)

    Rivera M, T., E-mail: trivera@ipn.mx [IPN, Centro de Investigacion en Ciencia Aplicada y Tecnologia Avanzada, Av. Legaria 694, 11500 Mexico D. F. (Mexico)

    2015-10-15

    Full text: Medical radiation is by far the largest man-made source of public exposure to ionizing radiation. Since 1970 the expression of protection standards shifted from a dose- to a risk-based approach, with dose limits established to yield risks to radiation workers comparable with those for workers in other safe industries. Another hand, worldwide interest in patient dose measurement was stimulated by the publication of Patient Dose Reduction in Diagnostic Radiology by the UK National Radiological Protection Board (NRPB). In response to heightened awareness of the importance of patient dose contributed by radiology procedures, there has been a general trend to effect control of patient doses by applying the principles of optimization coupled with an increase in regulatory enforcement. In this sense, thermoluminescent dosimetry (TLD) has been actively proposed in the last 3 decades thanks to their successful applications in diagnostic radiology. At the same time, it is emerged as the best radiation dosimetry method. The present work presents advantages of thermoluminescent dosimetry for X-ray beams measurements and its optimization. (Author)

  17. User questionnaire to evaluate the radiological workspace

    NARCIS (Netherlands)

    van Ooijen, Peter M. A.; Koesoema, Allya P.; Oudkerk, Matthijs

    2006-01-01

    Over the past few years, an increase in digitalization of radiology departments can be seen, which has a large impact on the work of the radiologists. This impact is not only demonstrated by the increased use of digital images but also by changing demands on the whole reading environment. In this st

  18. Acute radiologic intervention in gastrointestinal bleeding

    Energy Technology Data Exchange (ETDEWEB)

    Lesak, F.

    1986-01-01

    A case of embolization of the gastroduodenal artery in a 38-year old man with chronic pancreatitis and uncontrollable bleeding is presented. The advantage of this interventional radiologic procedure is discussed and in selective cases it seems to be the choice of treatment.

  19. Study on Application of Mobile Radiological Monitor

    Institute of Scientific and Technical Information of China (English)

    2011-01-01

    The mobile radiological monitor has been applied for the radiation level of a nuclear facility in 2011. Based on the requirement, the monitor had been improved, it can measure and save the data of gamma-ray and neutron radiation level, the dose rate and the

  20. Adult Education in Radiologic Technology: A Review.

    Science.gov (United States)

    Dowd, Steven B.

    In almost all its aspects, radiologic technology education is adult education. Boyle's (1981) adult learning model has four components: (1) the learner in terms of motivation; (2) learning as a change process; (3) the experiential role of education; and (4) the facilitative role of the educator. Andragogy, as defined by Knowles (1977, 1980), is a…

  1. Curriculum Development and Alignment in Radiologic Technology.

    Science.gov (United States)

    Dowd, Steven B.

    Before developing a curriculum for radiologic technology, one must first attempt to define the term "curriculum." The term is not easy to define precisely, although it does imply the necessity of a master plan that outlines institutional philosophy and goals, course descriptions, description of competency-based evaluation, performance objectives,…

  2. Recommendations for Radiologic Technology Workforce Development.

    Science.gov (United States)

    Collins, Dale E.

    A literature review was conducted to establish criteria for the development and establishment of an associate degree program in radiologic technology in Alaska, where traditional education programs had been slow to respond to the current personnel shortage. The information was obtained from a variety of state, regional, and national organizations…

  3. Curriculum Guidelines for Predoctoral Oral Radiology.

    Science.gov (United States)

    Journal of Dental Education, 1987

    1987-01-01

    The American Association of Dental Schools' guidelines for oral radiology curricula give an overview of the field and its interrelationships with other fields and outline the primary educational objectives, prerequisites, core content, specific behavioral objectives, sequencing, faculty, facilities, and occupational hazards to be considered in…

  4. Poland's syndrome: radiologic findings

    Energy Technology Data Exchange (ETDEWEB)

    Bazzi Junior, Joao Lourenco, E-mail: joaobazzijr@gmail.com [Clinica Via Imagem, Xanxere, SC (Brazil); Matta, Eduardo Simoes da [Pro Circulacao - Clinica de Angiologia, Cirurgia Vascular e Ecografia Vascular, Xanxere, SC (Brazil); De Bortoli, Luciano [Materclinica Materno Infantil, Xanxere, SC (Brazil); De Bortoli, Felipe Raasch [Universidade Catolica de Pelotas (UCPel), Pelotas, RS (Brazil). Fac. of Medicine

    2012-05-15

    Poland's syndrome is a rare non-inherited congenital anomaly. The authors describe the classic radiologic findings of Poland's syndrome by reporting the case of a male four-year old patient with asymmetry of hands and chest, illustrating the fundamental imaging criteria for a conclusive diagnosis. (author)

  5. Computer assisted radiology and surgery. CARS 2010

    Energy Technology Data Exchange (ETDEWEB)

    Anon.

    2010-06-15

    The conference proceedings include contributions to the following topics: (1) CARS Clinical Day: minimally invasive spiral surgery, interventional radiology; (2) CARS - computer assisted radiology and surgery: ophthalmology, stimulation methods, new approaches to diagnosis and therapy; (3) Computer assisted radiology 24th International congress and exhibition: computer tomography and magnetic resonance, digital angiographic imaging, digital radiography, ultrasound, computer assisted radiation therapy, medical workstations, image processing and display; (4) 14th Annual conference of the International Society for computer aided surgery; ENT-CMF head and neck surgery computer-assisted neurosurgery, cardiovascular surgery, image guided liver surgery, abdominal and laparoscopic surgery, computer-assisted orthopedic surgery, image processing and visualization, surgical robotics and instrumentation, surgical modeling, simulation and education; (5) 28th International EuroPACS meeting: image distribution and integration strategies, planning and evaluation, telemedicine and standards, workflow and data flow in radiology; (6) 11th CARS/SPIE/EuroPACS joint workshop on surgical PACS and the digital operating, management and assessment of OR systems and integration; (7) 12th International workshop on computer-aided diagnosis: special session on breast CAD, special session on thoracic CAD, special session on abdominal brain, lumbar spine CAD; (8) 16th computed Maxillofacial imaging congress: computed maxillofacial imaging in dental implantology, orthodontics and dentofacial orthopedics; approaches to 3D maxillofacial imaging; surgical navigation; (9) 2nd EuroNOTES/CARS workshop on NOTES: an interdisciplinary challenge; (10) 2nd EPMA/CARS workshop on personalized medicine and ICT.; (11)poster sessions.

  6. Interventional radiology in the lacrimal drainage system

    Energy Technology Data Exchange (ETDEWEB)

    Ilgit, Erhan T. [Department of Radiology, School of Medicine, Gazi University, Besevler 06510, Ankara (Turkey)]. E-mail: erhanti@gazi.edu.tr; Oenal, Baran [Department of Radiology, School of Medicine, Gazi University, Besevler 06510, Ankara (Turkey); Coskun, Bilgen [Department of Radiology, School of Medicine, Gazi University, Besevler 06510, Ankara (Turkey)

    2005-09-01

    This article presents a review of the interventional radiological procedures in the lacrimal drainage system. Balloon dacryocystoplasty and nasolacrimal polyurethane stent placement are the main fluoroscopically guided interventions for the treatment of epiphora by recanalizing the obstructed LDS. These procedures can also be used for dacryolith removal and lacrimal sac abscess treatment.

  7. Historical Outline of Radiology in Cienfuegos

    Directory of Open Access Journals (Sweden)

    Clara Hilda Vega Blanco

    2016-12-01

    Full Text Available La elevada importancia que ha tenido el desarrollo y utilización adecuada de la radiología (actualmente imagenología para el diagnóstico de diversas afecciones médicas en el presente siglo, especialmente en las últimas décadas, unida a la ausencia de investigaciones relacionadas con el surgimiento y evolución de dicha especialidad en nuestra localidad, sustenta la necesidad de brindar un mayor conocimiento de la historia de la Radiología en Cienfuegos. El objetivo de este estudio es exponer los elementos relacionados con el surgimiento y desarrollo de la Radiología en Cuba, particularmente en Cienfuegos, así como los beneficios que ha traído a la población de esta ciudad. Para ello se realizó un estudio cualitativo, de perfil histórico y descriptivo. Se exponen aspectos relacionados con la asistencia y la docencia del personal no médico y se hace alusión a diversas personalidades relevantes vinculadas a esta actividad. El surgimiento de la Radiología en la provincia se remonta a los primeros años de la segunda década del 1900, sin embargo, no fue hasta después del triunfo de la revolución en 1959, que experimentó un verdadero avance tecnológico.

  8. Radiological aspects of sprained ankle syndrome

    NARCIS (Netherlands)

    Sijbrandij, E.S.

    2002-01-01

    This thesis addresses several problems related to sprained ankle syndrome. The purpose of this thesis is to evaluate the imaging features of sprained ankles, found on new radiological modalities, and to assess the additional diagnostic understanding and treatment planning of helical CT as well as M

  9. Test and evaluation report for Lockheed Idaho Technologies Company, arrow-pak packaging, docket 95-40-7A, type A container

    Energy Technology Data Exchange (ETDEWEB)

    Kelly, D.L.

    1996-03-14

    This report incorporates the U.S. Department of Energy, Office of Facility Safety Analysis (DOE/EH-32) approval letter for packaging use. This report documents the U.S. Department of Transportation Specification 7A Type A (DOT-7A) compliance test results of the Arrow-Pak packaging. The Arrow-Pak packaging system consists of Marlex M-8000 Driscopipe, manufactured by Phillips-Driscopipe, Inc., and is sealed with two dome-shaped end caps manufactured from the same materials. The patented sealing process involves the use of electrical energy to heat opposing faces of the pipe and end caps, and hydraulic rams to press the heated surfaces together. This fusion process produces a homogeneous bonding of the end cap to the pipe. The packaging may be used with or without the two internal plywood spacers. This packaging configuration described in this report is designed to ship Type A quantities of solid radioactive materials.

  10. Final evaluation report for Lockheed Idaho Technologies Company, ARROW-PAK packaging, Docket 95-40-7A, Type A container

    Energy Technology Data Exchange (ETDEWEB)

    Kelly, D.L.

    1995-11-01

    The report documents the U.S. Department of Transportation Specification 7A Type A (DOT-7A) compliance test results of the ARROW-PAK packaging. The ARROW-PAK packaging system consists of Marlex M-8000 Driscopipe (Series 8000 [gas] or Series 8600 [industrial]) resin pipe, manufactured by Phillips-Driscopipe, Inc., and is sealed with two dome-shaped end caps manufactured from the same materials. The patented sealing process involves the use of electrical energy to heat opposing faces of the pipe and end caps, and hydraulic rams to press the heated surfaces together. This fusion process produces a homogeneous bonding of the end cap to the pipe. The packaging may be used with or without the two internal plywood spacers. This packaging was evaluated and tested in October 1995. The packaging configuration described in this report is designed to ship Type A quantities of solid radioactive materials, Form No. 1, Form No. 2, and Form No. 3.

  11. Chance findings in skeletal radiology; Zufallsbefunde in der Skelettradiologie

    Energy Technology Data Exchange (ETDEWEB)

    Freyschmidt, Juergen [Beratungsstelle und Referenzzentrum fuer Osteoradiologie, Bremen (Germany)

    2016-08-01

    The book on chance findings in skeletal radiology covers the following issues: Part (I): Introduction - what are chance findings? Part (II); change findings under different radiological modalities: most frequent skeletal radiological change findings: scintiscanning, radiography and CT, MRT, PET and PET/CT. Part (III): case studies: skull; spinal cord; shoulder/pectoral girdle, chest; pelvis and hip joints; upper extremities; lower extremities.

  12. A New Role for Local Police in Radiological Security

    Science.gov (United States)

    2007-09-01

    ORGANIZATIONAL STRUCTURE ..................18 J. THREATENED USES OF RADIOLOGICAL WEAPONS......................20 K. GOIANIA , BRAZIL... GOIANIA , BRAZIL There have been no documented explosions of a radiological dispersal device by terrorists. A radiological incident in Gioania...Accident in Goiania (Vienna, Austria: IAEC, 1988), 13. 22 avoided the region. The total economic damages were estimated to be in the hundreds of

  13. 21 CFR 892.1830 - Radiologic patient cradle.

    Science.gov (United States)

    2010-04-01

    ... 21 Food and Drugs 8 2010-04-01 2010-04-01 false Radiologic patient cradle. 892.1830 Section 892.1830 Food and Drugs FOOD AND DRUG ADMINISTRATION, DEPARTMENT OF HEALTH AND HUMAN SERVICES (CONTINUED) MEDICAL DEVICES RADIOLOGY DEVICES Diagnostic Devices § 892.1830 Radiologic patient cradle....

  14. An Overview of Dental Radiology. NCHCT Monograph Series.

    Science.gov (United States)

    Manny, Edward F.; And Others

    This overview of dental radiology contains sections on demographics, equipment, dental radiology quality assurance, efficacy, dental radiology education curricula, professional organizations' guidelines for training and use, and state activities. In section 1 dental personnel, population of dental personnel, employment and earning prospects,…

  15. 21 CFR 892.1940 - Radiologic quality assurance instrument.

    Science.gov (United States)

    2010-04-01

    ... 21 Food and Drugs 8 2010-04-01 2010-04-01 false Radiologic quality assurance instrument. 892.1940 Section 892.1940 Food and Drugs FOOD AND DRUG ADMINISTRATION, DEPARTMENT OF HEALTH AND HUMAN SERVICES (CONTINUED) MEDICAL DEVICES RADIOLOGY DEVICES Diagnostic Devices § 892.1940 Radiologic quality...

  16. Medical Student Perceptions of Radiology Use in Anatomy Teaching

    Science.gov (United States)

    Murphy, Kevin P.; Crush, Lee; O'Malley, Eoin; Daly, Fergus E.; Twomey, Maria; O'Tuathaigh, Colm M. P.; Maher, Michael M.; Cryan, John F.; O'Connor, Owen J.

    2015-01-01

    The use of radiology in the teaching of anatomy to medical students is gaining in popularity; however, there is wide variation in how and when radiology is introduced into the curriculum. The authors sought to investigate students' perceptions regarding methods used to depict and teach anatomy and effects of integrated radiology instruction on…

  17. 42 CFR 415.120 - Conditions for payment: Radiology services.

    Science.gov (United States)

    2010-10-01

    ... 42 Public Health 3 2010-10-01 2010-10-01 false Conditions for payment: Radiology services. 415.120... Services to Beneficiaries in Providers § 415.120 Conditions for payment: Radiology services. (a) Services to beneficiaries. The carrier pays for radiology services furnished by a physician to a...

  18. Post-deployment usability evaluation of a radiology workstation

    NARCIS (Netherlands)

    Jorritsma, Wiard; Cnossen, Fokie; Dierckx, Rudi; Oudkerk, Matthijs; van Ooijen, Peter

    2015-01-01

    Objective To evaluate the usability of a radiology workstation after deployment in a hospital. Significance In radiology, it is difficult to perform valid pre-deployment usability evaluations due to the heterogeneity of the user group, the complexity of the radiological workflow, and the complexity

  19. Broken bond symmetry assists stripe pinning in superconducting La2-xSrxCuO4

    Science.gov (United States)

    Tranquada, John; Jacobsen, H.; Zaliznyak, I. A.; Huecker, M.; Gu, G. D.; Savici, A. T.; Winn, B.; Chang, S.

    There has been evidence for quite some time for some degree of charge and spin stripe order in La2-xSrxCuO4 (LSCO). This has been a bit surprising as the crystal structure is supposed to lack the anisotropic Cu-O bonds that lead to robust stripe pinning in La2-xBaxCuO4. Using neutron scattering measurements on the HYSPEC instrument at the Spallation Neutron Source, we have discovered evidence for broken bond symmetry and strong associated lattice fluctuations in an LSCO crystal with x = 0 . 07. The broken bond symmetry occurs within the orthorhombic phase. We also observe quasielastic incommensurate spin excitations that coexist with the bulk superconductivity, suggesting some degree of pair-density-wave order in the superconducting state. Work at BNL supported by Office of Basic Energy Sciences, US DOE, under Contract No. DE-SC00112704.

  20. Support vector machine used to diagnose the fault of rotor broken bars of induction motors

    DEFF Research Database (Denmark)

    Zhitong, Cao; Jiazhong, Fang; Hongpingn, Chen

    2003-01-01

    from the SLT. Here we were done some analogical experiments of the rotor broken bar faults of induction motors used, analyzed the signals of the sample currents with Fourier transform, and constructed the spectrum characteristics from low frequency to high frequency used as learning sample vectors...... for the SVM. After a SVM is trained with learning sample vectors, so each kind of the rotor broken bar faults of induction motors can be classified. Finally the retest is demonstrated, which proves that the SVM really has preferable ability of classification. In this paper we tried applying the SVM...... to diagnose the faults of induction motors, and the results suggested that the SVM could yet be regarded as a new method in the fault diagnosis....

  1. On-Line Broken-Bar Fault Diagnosis System of Induction Motor

    Institute of Scientific and Technical Information of China (English)

    ZHANG Rong; WANG Xiuhe

    2008-01-01

    Induction motor faults including mechanical and electrical faults are reviewed. The fault diagnosis methods are summarized. To analyze the influence of stator current, torque, speed and rotor current on faulted bars, a time-stepping transient finite element (FE) model of induction motor with bars faulted is created in this paper. With wavelet package analysis method and FFT method, the simulation result of finite element is analyzed. Based on the simulation analysis, the on-line fault diagnosis system of induction motor with bars faulted is developed. With the speed of broken bars motor changed from 1 478 r/min to 1 445 r/min, the FFT power spectra and the wavelet package decoupling factors are given. The comparison result shows that the on-line diagnosis system can detect broken-bar fault efficiently.

  2. On Inaudible Properties of Broken Drums - Isospectral Domains with Mixed Boundary Conditions

    CERN Document Server

    Herbrich, Peter

    2011-01-01

    Since Kac raised the question "Can one hear the shape of a drum?", various families of non-smooth counterexamples have been constructed using the transplantation method, which is based on a group-theoretic technique by Sunada. We apply the transplantation method to domains with mixed boundary conditions, which can be interpreted as broken drums. The method is translated into graph theory which allows for a computer-aided search for transplantable pairs, and a classification in terms of induced representations. Several tools are developed with which new pairs can be generated from given ones. In the end, we discuss inaudible properties and present the first example of a connected drum that sounds disconnected, and of a broken drum that sounds unbroken, that is, a planar domain with mixed boundary conditions that is isospectral to a domain with Dirichlet boundary conditions. Above all, the latter example shows that an orbifold can be Dirichlet isospectral to a manifold. The appendix contains several transplanta...

  3. 2D finite element analysis and force calculations for induction motors with broken bars

    Directory of Open Access Journals (Sweden)

    Hanafy Hassan Hanafy

    2014-06-01

    Full Text Available In this paper an ABC transient model of the three phase induction motor is developed that depends on self- and mutual inductance calculations based on accurate finite element analysis (FEA. This model can represent both healthy and broken bars’ conditions. The effects of that type of fault on the stator current, rotor bar currents distribution, the forces exerted on the rotor bars, the motor speed and motor torque are studied. It was observed that broken bar faults will cause fluctuations in the stator peak current and in the motor speed and torque. It was found that the asymmetry in the rotor bar currents will lead to asymmetrical distribution of the radial and tangential forces affecting the bars. The asymmetry in the tangential forces causes the fluctuations in the motor torque, while the asymmetry in the radial forces will increase the mechanical stresses on the rotor shaft.

  4. Segmental odontomaxillary dysplasia: clinical, radiological and histological aspects of four cases

    DEFF Research Database (Denmark)

    Becktor, K.B.; Reibel, J.; Vedel, B.;

    2002-01-01

    Segmental odontomaxillary dysplasia, hemimaxillofacial dysplasia, histological and radiological findings......Segmental odontomaxillary dysplasia, hemimaxillofacial dysplasia, histological and radiological findings...

  5. KONSEP DIRI DAN SELF DISCLOSURE REMAJA BROKEN HOME DI KOTA MAKASSAR

    OpenAIRE

    PADATU, HESLY

    2015-01-01

    2015 HESLY PADATU. Pembentukan Konsep Diri dan Self Disclousure Remaja Broken Home di Kota Makassar. Dibimbing oleh Tuti Bahfiarti dan Alem Febri Sony. Penelitian ini bertujuan mengetahui Penelitian ini dilaksanakan di Kota Makassar pada tanggal 27 Februari sampai 2 Mei 2015. Tipe penelitian yang digunakan dalam penelitian ini adalah deskriptif kualitatif. Teknik pengumpulan datanya dilakukan dengan cara observasi, wawancara, dan kajian pustaka. Data yang diperol...

  6. Efficacy Study of Broken Rice Maltodextrin in In Vitro Wound Healing Assay

    OpenAIRE

    Zahiah Mohamed Amin; Soo Peng Koh; Swee Keong Yeap; Nur Syazwani Abdul Hamid; Chin Ping Tan; Kamariah Long

    2015-01-01

    Maltodextrins that contain both simple sugars and polymers of saccharides have been widely used as ingredients in food products and pharmaceutical delivery systems. To date, no much work has been reported on the applications of maltodextrin from broken rice (RB) sources. Therefore, the objective of this work was to investigate the in vitro wound healing efficacy of RB maltodextrin at different conditions. Wounds treated with lower dextrose equivalent (DE) range (DE 10–14) of maltodextrins at ...

  7. Broken SU(4) Symmetry and The Fractional Quantum Hall Effect in Graphene

    Science.gov (United States)

    Sodemann, Inti; MacDonald, Allan

    2014-03-01

    We describe a simple variational approach to understand the spin-valley broken symmetry states in the fractional quantum Hall regime of graphene. Our approach allows to predict the incompressible ground states and their charge gaps and is able to explain the observed differences between filling factor ranges | ν | Materials Sciences and Engineering under grant DE-FG03-02ER45958 and by the Welch foundation under grant TBF1473.

  8. Goulburn Broken Catchment, Victoria: Development offsets and tradeable property rights pilot studies

    OpenAIRE

    Markets for Ecosystem Services Project

    2007-01-01

    Metadata only record There are two "markets for ecosystem services" pilot studies in the Goulburn Broken Catchment of Victoria, Australia. The first, "Development Offsets", aims to develop a scheme of defined "offsets" to compensate for specific ecosystem impacts of rural development. The second, "Treading Salty Water or Trading Salt & Water", addresses the costs of dryland salinity with a proposed mechanism for tradeable property rights. The objective is to incorporate the broader scale i...

  9. Broken Umbilical Vein Catheter as an Embolus in a Neonate- An Unusual Preventable Complication

    Directory of Open Access Journals (Sweden)

    Anjan Kumar Dhua

    2013-10-01

    Full Text Available Umbilical vein catheter (UVC is used in managing critically sick neonates all over the world. It is generally considered to be safe although various complications can arise and are well known. Herein we describe a successful retrieval of a broken and migrated UVC across the heart in a neonate. Pertinent literature regarding rarity of its occurrence and mechanism of occurrence has been touched upon to prevent such untoward complications.

  10. MRI of broken bioabsorbable crosspin fixation in hamstring graft reconstruction of the anterior cruciate ligament

    Energy Technology Data Exchange (ETDEWEB)

    Bakhru, Prashant [Department of Radiology Jacobi Medical Center, Bronx, NY (United States); Park, Brian [Albert Einstein College of Medicine, Bronx, NY (United States); Umans, Hilary [Department of Radiology Jacobi Medical Center, Bronx, NY (United States); Lenox Hill Radiology and Imaging Associates, P.C., New York, NY (United States); DiFelice, Gregory S. [Hospital for Special Surgery, New York, NY (United States); Tobin, Keith [Lenox Hill Radiology and Imaging Associates, P.C., New York, NY (United States)

    2011-06-15

    To report seven cases of broken bioabsorbable femoral crosspins identified by MRI in evaluation of hamstring grafts of the anterior cruciate ligament. Seven cases of broken bioabsorbable crosspins utilized in femoral fixation of ACL hamstring grafts were identified prospectively and retrospectively from our PACs database during a period from 9/1/08 to 8/31/09. All imaging was performed using 1.5 or 3.0 Tesla MRI and were evaluated for T2 signal within and surrounding the crosspin, osteolysis surrounding the fragments, displacement of fragments, and graft integrity. Time from surgery was also recorded. Seven cases of hamstring grafts with broken bioabsorbable crosspins were imaged 4 months to 3 years following grafting. There was osteolysis surrounding the crosspin in all but one case in which the graft was intact but a pin fragment was displaced into the joint. One graft failed due to aseptic foreign-body reaction to the fixation with aggressive osteolysis at 9 months post surgery. In the remaining five, the ACL graft was either completely torn, partially torn, lax, or degenerative and frayed. Of these, the crosspins were broken and angulated with osteolysis surrounding the apex of the angulated fragment or demonstrated lateral extrusion of the peripheral fragment. Bioabsorbable crosspins utilized in femoral fixation of hamstring graft reconstruction of the ACL may become fractured. While the natural history of osteo-integration of these devices as demonstrated by MRI has not been defined, osteolysis surrounding the fragments, extrusion or displacement of the fragments, and graft laxity or failure would suggest that these are abnormal findings that should be reported. (orig.)

  11. Atomic sulfur: Frequency measurement of the J = 0 left arrow 1 fine-structure transition at 56.3 microns by laser magnetic resonance

    Science.gov (United States)

    Brown, John M.; Evenson, Kenneth M.; Zink, Lyndon R.

    1994-01-01

    The J = 0 left arrow 1 fine-structure transition in atomic sulfur (S I) in its ground (3)P state has been detected in the laboratory by far-infrared laser magnetic resonance. The fine-structure interval has been measured accurately as 5,322,492.9 +/- 2.8 MHz which corresponds to a wavelength of 56.325572 +/- 0.000030 micrometers.

  12. Prediction of accidents at full green and green arrow traffic lights in Switzerland with the aid of configuration-specific features.

    Science.gov (United States)

    Hubacher, Markus; Allenbach, Roland

    2004-09-01

    In this study it was endeavored to predict full green and green arrow accidents at traffic lights, using configuration-specific features. This was done using the statistical method known as Poisson regression. A total of 45 sets of traffic lights (criteria: in an urban area, with four approach roads) with 178 approach roads were investigated (the data from two approach roads was unable to be used). Configuration-specific features were surveyed on all approach roads (characteristics of traffic lanes, road signs, traffic lights, etc.), traffic monitored and accidents (full green and green arrow) recorded over a period of 5 consecutive years. It was demonstrated that only between 23 and 34% of variance could be explained with the models predicting both types of accidents. In green arrow accidents, the approach road topography was found to be the major contributory factor to an accident: if the approach road slopes downwards, the risk of a green arrow accident is approximately five and a half times greater (relative risk, RR = 5.56) than on a level or upward sloping approach road. With full green accidents, obstructed vision plays the major role: where vision can be obstructed by vehicles turning off, the accident risk is eight times greater (RR = 8.08) than where no comparable obstructed vision is possible. From the study it emerges that technical features of traffic lights are not able to control a driver's actions in such a way as to eradicate error. Other factors, in particular the personal characteristics of the driver (age, sex, etc.) and accident circumstances (lighting, road conditions, etc.), are likely to make an important contribution to explaining how an accident occurs.

  13. ORAL ISSUE OF THE JOURNAL "USPEKHI FIZICHESKIKH NAUK": Quantum measurements, the phenomenon of life, and time arrow: three great problems of physics (in Ginzburg's terminology) and their interrelation

    Science.gov (United States)

    Mensky, Mikhail B.

    2007-04-01

    Relations existing among "the three great problems" of physics (as enumerated by Ginzburg) — interpretation of quantum mechanics, the time arrow, and reductionism (reducing the phenomenon of life to physics) — are discussed and shown to substantially depend on how the first of them is solved, i.e., which interpretation of quantum mechanics is adopted. The Copenhagen interpretation, the Everett ('many-words') interpretation, and Extended Everett Concept proposed by the author are considered.

  14. Broken Ankle/Broken Foot

    Science.gov (United States)

    ... certain occupations. Certain work environments, such as a construction site, put you at risk of falling from ... shield Mayo Clinic logo are trademarks of Mayo Foundation for Medical Education and Research. © 1998-2017 Mayo ...

  15. Closed retrograde retrieval of the distal broken segment of femoral cannulated intramedullary nail using a ball-tipped guide wire

    Directory of Open Access Journals (Sweden)

    Sreenivasulu Metikala

    2011-01-01

    Full Text Available Background: Extracting broken segments of intramedullay nails from long bones can be an operative challenge, particularly from the distal end. We report a case series where a simple and reproducible technique of extracting broken femoral cannulated nails using a ball-tipped guide wire is described. This closed technique involves no additional equipment or instruments. Materials and Methods: Eight patients who underwent the described method were included in the study. The technique involves using a standard plain guide wire passed through the cannulated distal broken nail segment after extraction of the proximal nail fragment. The plain guide wire is then advanced distally into the knee joint carefully under fluoroscopy imaging. Over this wire, a 5-millimeter (mm cannulated large drill bit is used to create a track up to the distal broken nail segment. Through the small knee wound, a ball-tipped guide wire is passed, smooth end first, till the ball engages the end of the nail. The guide wire is then extracted along with the broken nail through the proximal wound. Results: The method was successfully used in all eight patients for removal of broken cannulated intramedullary nail from the femoral canal without any complications. All patients underwent exchange nailing with successful bone union in six months. None of the patients had any problems at the knee joint at the final follow-up. Conclusion: We report a technique for successful extraction of the distal fragment of broken femoral intramedullary nails without additional surgical approaches.

  16. Evolution of symmetry-broken states in the pseudogap regime of cuprates - the atomic structure footprints

    Science.gov (United States)

    Bozin, Emil; Zhong, R.; Knox, K. R.; Winn, B. L.; Gu, G. D.; Hill, J. P.; Tranquada, J. M.; Billinge, S. J. L.

    2015-03-01

    Revealing the nature of the symmetry broken states in strongly correlated electron systems in general, and in the pseudo-gap (PG) phase of cuprates in particular, is instrumental in understanding the underlying properties. To that effect the knowledge of the local atomic structure may reveal relevant details important for more comprehensive understanding of the character of symmetry broken states in strongly correlated electron systems. Atomic pair distribution function (PDF) is one of the few experimental methods that can speak to this problem. Mounting experimental evidence suggests that the pseudogap phase may represent an electronic state in which the four-fold rotational symmetry of the CuO2 planes is broken, pointing to stripe or nematic character. Systematic approach has been taken in charting both long and short range structural orders, on an equal footing, across the (x, T) phase diagrams of cuprates. For example, in La2-xBaxCuO4, by combining inelastic neutron scattering and neutron PDF approaches, we find evidence consistent with there being a dynamic symmetry breaking well above the charge ordering temperature and within the pseudogap regime. The response has non-monotonic doping dependence that peaks at 1/8 composition. Work at Brookhaven National Laboratory was supported by US DOE, Office of Science, Office of Basic Energy Sciences (DOE-BES) under Contract DE-AC02-98CH10886.

  17. A study considering the force required for broken glass bottles to penetrate a skin simulant.

    Science.gov (United States)

    Nolan, Gary; Lawes, Simon; Hainsworth, Sarah; Rutty, Guy

    2012-01-01

    Injuries and assaults related to alcohol consumption are a growing concern in many countries. In such cases, the use of impulsive weapons, an object from the immediate environment, such as a glass bottle, is not uncommon. This current study utilises a material testing system to measure the force required to push a broken glass bottle into a skin simulant with the displacement of the bottle into the skin simulant being recorded simultaneously, using a linear variable differential transformer (LVDT). From this data, load versus displacement plots were produced. Multi-detector computed tomography (MDCT) was also used to analyse bottle wall thickness to determine if a relationship could be found between force required for penetration and bottle wall thickness. The forces required for the penetration of the skin simulant ranged from 9.8 to 56.7 N. The range was found to be independent of bottle type with the variation in force for penetration being attributed to the varying fracture points, with some fractures presenting a sharper point on first contact with the skin. Although the dangers associated with the use of broken bottles as weapons is apparent, there is a paucity of information in this area in the current English literature, which this study has addressed. The results of this study also highlight the risks of attempting reconstructions of broken bottle stab events.

  18. No-Cook Process for Ethanol Production Using Indian Broken Rice and Pearl Millet

    Directory of Open Access Journals (Sweden)

    Vipul Gohel

    2012-01-01

    Full Text Available No-cook process using granular starch hydrolyzing enzyme (GSHE was evaluated for Indian broken rice and pearl millet. One-factor-at-a-time optimization method was used in ethanol production to identify optimum concentration of GSHE, under yeast fermentation conditions using broken rice and pearl millet as fermentation feedstocks. An acid fungal protease at a concentration of 0.2 kg per metric ton of grain was used along with various dosages of GSHE under yeast fermentation conditions to degrade the grain proteins into free amino nitrogen for yeast growth. To measure the efficacy of GSHE to hydrolyze no-cook broken rice and pearl millet, the chemical composition, fermentation efficiency, and ethanol recovery were determined. In both feedstocks, fermentation efficiency and ethanol recovery obtained through single-step no-cook process were higher than conventional multistep high-temperature process, currently considered the ideal industrial process. Furthermore, the no-cook process can directly impact energy consumption through steam saving and reducing the water cooling capacity needs, compared to conventional high-temperature process.

  19. Enhanced CP violation with B {r_arrow} KD{sup 0} ({anti D}{sup 0}) modes and extraction of the CKM angle {gamma}

    Energy Technology Data Exchange (ETDEWEB)

    David Atwood; Isard Dunietz; Amarjit Soni

    1996-12-01

    The Gronau-London-Wyler (GLW) method extracts the CKM angle {gamma} by measuring B{sup {+-}} decay rates involving D{sup 0}/{anti D}{sup 0} mesons. Since that method necessitates the interference between two amplitudes that are significantly different in magnitude, the resulting asymmetries tend to be small. CP violation can be greatly enhanced for decays to final states that are common to both D{sup 0} and {anti D}{sup 0} and that are not CP eigenstates. In particular, large asymmetries are possible for final states f such that D{sup 0} {r_arrow} f is doubly Cabibbo suppressed while {anti D}{sup 0} {r_arrow} f is Cabibbo allowed. The measurement of interference effects in two such modes allows the extraction of {gamma} without prior knowledge of Br(B{sup {minus}} {r_arrow} K{sup {minus}} {anti D}{sup 0}), which may be difficult to determine due to backgrounds.

  20. High statistics search for v{sub e}({bar v}{sub e}){r_arrow}v{sub {tau}}({bar v}{sub {tau}}) oscillations

    Energy Technology Data Exchange (ETDEWEB)

    Johnson, R.A.; Vakili, M. [University of Cincinnati, Cincinnati, Ohio 45221 (United States); Romosan, A.; Arroyo, C.G.; Bazarko, A.O.; Conrad, J.; Kim, J.H.; King, B.J.; Lefmann, W.C.; McNulty, C.; Mishra, S.R.; Quintas, P.Z.; Sciulli, F.J.; Seligman, W.G.; Shaevitz, M.H.; Spentzouris, P.; Stern, E.G. [Columbia University, New York, New York 10027 (United States); Bernstein, R.H.; Lamm, M.J.; Marsh, W.; Yu, J. [Fermi National Accelerator Laboratory, Batavia, Illinois 60510 (United States); Naples, D.; Bolton, T. [Kansas State University, Manhattan, Kansas 66506 (United States); de Barbaro, L.; Schellman, H. [Northwestern University, Evanston, Illinois 60208 (United States); Drucker, R.B. [University of Oregon, Eugene, Oregon 97403 (United States); de Barbaro, P.; Bodek, A.; Budd, H.; Harris, D.A.; McFarland, K.S.; Sakumoto, W.K.; Yang, U.K. [University of Rochester, Rochester, New York 14627 (United States); Kinnel, T.; Smith, W.H. [University of Wisconsin, Madison, Wisconsin 53706 (United States)

    1999-02-01

    We present new limits on v{sub e}({bar v}{sub e}){r_arrow}v{sub {tau}}({bar v}{sub {tau}}) and v{sub e}({bar v}{sub e}){r_arrow}v{sub s} oscillations by searching for v{sub e} disappearance in the high-energy wideband CCFR neutrino beam. Sensitivity to v{sub {tau}} appearance comes from {tau} decay modes in which a large fraction of the energy deposited is electromagnetic. The beam is composed primarily of v{sub {mu}}({bar v}{sub {mu}}), but this analysis uses the 2.3{percent} v{sub e}({bar v}{sub e}) component of the beam. Electron neutrino energies range from 30 to 600 GeV and flight lengths vary from 0.9 to 1.4 km. This limit improves the sensitivity of existing limits for v{sub e}{r_arrow}v{sub {tau}} at high {Delta}m{sup 2} and obtains a lowest 90{percent} confidence upper limit in sin{sup 2}2{alpha} of 9.9{times}10{sup {minus}2} at {Delta}m{sup 2}{approximately}125 eV{sup 2}. {copyright} {ital 1998} {ital The American Physical Society}

  1. Bearing the Burden of Native Experience: A Stylistic Approach to Chinua Achebe’s Arrow of God

    Directory of Open Access Journals (Sweden)

    Debaleena Dutta

    2010-04-01

    Full Text Available Chinua Achebe has made a creative Africanization of the English language in all his literary works. In the process of writing counter-narratives to Euro-centric misrepresentations of Africa, Achebe has successfully harnessed the colonizer’s language to make it bear the burden of his native experience. The present paper proposes to take up the third novel by Achebe, namely Arrow of God (1964 to introspect the different kinds of narrative strategies involved in it. This includes a study of the kind of narrator used, and a survey of the various ways in which the language is maneuvred—through the usage of standard and pidgin English, through linguistic devices like humour, satire and irony, through symbols, proverbs, images, metaphors and songs—in order to capture a vivid picture of Nigeria of the late 1920s, in which the novel is set. In a nutshell, this stylistic criticism aims to illustrate in effect how Achebe creatively extends the frontiers of English language to accommodate the various shades of Nigerian reality within it.

  2. [Ergonomics of the workplace in radiology].

    Science.gov (United States)

    García-Lallana, A; Viteri-Ramírez, G; Saiz-Mendiguren, R; Broncano, J; Dámaso Aquerreta, J

    2011-01-01

    The replacement of conventional films and view boxes with digital images and computer monitors managed by PACS has clearly improved the diagnostic imaging workplace. The new setup has many advantages, including increased productivity brought about by decreased overall time required for image interpretation. On the other hand, the implementation of the digital workplace has increased the importance of factors like background lighting and the position of the chair, work table, mouse, keyboard, and monitor to prevent lesions that can disable the radiologist. The influence of these factors is often undervalued in the design and implementation of the radiological workplace. This article provides recommendations for the design of the radiological workplace based on ergonomics, which is the science that studies interactions among humans and other elements of a system.

  3. Interventional radiology: a half century of innovation.

    Science.gov (United States)

    Baum, Richard A; Baum, Stanley

    2014-11-01

    The evolution of modern interventional radiology began over half century ago with a simple question. Was it possible to use the same diagnostic imaging tools that had revolutionized the practice of medicine to guide the real-time treatment of disease? This disruptive concept led to rapid treatment advances in every organ system of the body. It became clear that by utilizing imaging some patients could undergo targeted procedures, eliminating the need for major surgery, while others could undergo procedures for previously unsolvable problems. The breadth of these changes now encompasses all of medicine and has forever changed the way we think about disease. In this brief review article, major advances in the field, as chronicled in the pages of Radiology, will be described.

  4. Peritoneal mesothelioma; Radiologic appearances correlated with histology

    Energy Technology Data Exchange (ETDEWEB)

    Ros, P.R.; Yuschok, T.J.; Buck, J.L.; Shekitka, K.M.; Kaude, J.V. (Florida Univ. Coll. of Medicine, Gainesville, FL (United States). Dept. of Radiology Armed Forces Inst. of Pathology, Washington, DC (United States). Depts. of Radiologic Pathology and Gastrointestinal Pathology)

    1991-09-01

    Previous imaging reports of peritoneal mesothelioma have described a variety of radiologic appearances, but have not included its pathologic classification. We retrospectively reviewed 10 cases of peritoneal mesothelioma representing the following histologic categories: 7 epithelial, 2 sarcomatoid, and one biphasic. By imaging, epithelial mesotheliomas demonstrated diffuse thickening of the peritoneum and mesentery and/or multiple small nodules. The sarcomatoid-type appeared as a mass and the biphasic-type had radiologic and gross pathologic features of both sarcomatoid and epithelial types. We conclude that peritoneal mesothelioma presents with a wide spectrum of radiographic appearances and should therefore be included in the differential diagnoses of diffuse as well as localized peritoneal processes. (orig.).

  5. Radiological protection report 2007; Strahlenschutzbericht 2007

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2008-07-01

    This annual report issued by the Swiss Federal Nuclear Inspectorate (HSK) reports on the work carried out by the Inspectorate in 2007. It provides comprehensive data on radiation protection activities in Switzerland during 2007. This is the fourth annual summary report on the radiological protection issues regulated by the Inspectorate. It provides comprehensive data on doses for the staff and for individual jobs. It also includes year-to-year comparisons and comments on the continuing decline in collective and average doses for persons exposed to radiation in the course of their work. Radiation doses are commented on. Radiation in the four Swiss nuclear power stations and in four further nuclear installations in various Swiss research facilities is commented on. The Swiss radiation measurement network is commented on and the results obtained are discussed. The Inspectorate concludes that radiological protection in Swiss nuclear facilities is carried out consistently and in compliance with existing legislation.

  6. Radiologic aspects of epiphysial dysplasia in adults

    Energy Technology Data Exchange (ETDEWEB)

    Andreeva, V.F. (Leningradskij Inst. Usovershenstvovaniya Vrachej (USSR))

    The results of radiologic examination of 40 patients aged 15 to 64 years with epiphysial (spondyloepiphysial) displasia, adequate in manifestness to developmental anomaly are analyzed. The radiologic examination involved standard radiographs in standard and atypical projections, radiography with direct enlargement of X-ray appearance, and tomography. Various types of epiphysial deformation have been distinguished as a manifest feature of the above-mentioned dysplastic process. Possible combinations of the tubular bones epiphysial hypoplasia with the damage of other articular components are pointed out. Concomitant degenerative-dystrophic processes are characterized as deforming arthrosis, degenerative-dystrophic lesions with cystoid reconstruction of the articulating bones, and aseptic epiphysial necrosis. X-ray picture of the degenerative-dystrophic lesion with cystoid reconstruction of the hinging bones is disclosed most comprehensively.

  7. Knee bone tumors: findings on conventional radiology*

    Science.gov (United States)

    Andrade Neto, Francisco; Teixeira, Manuel Joaquim Diógenes; Araújo, Leonardo Heráclio do Carmo; Ponte, Carlos Eduardo Barbosa

    2016-01-01

    The knee is a common site for bone tumors, whether clinically painful or not. Conventional radiology has been established as the first line of investigation in patients with knee pain and can reveal lesions that often generate questions not only for the generalist physician but also for the radiologist or general orthopedist. History, image examination, and histopathological analysis compose the essential tripod of the diagnosis of bone tumors, and conventional radiology is an essential diagnostic tool in patients with knee pain. This pictorial essay proposes to depict the main conventional radiography findings of the most common bone tumors around the knee, including benign and malignant tumors, as well as pseudo-tumors. PMID:27403019

  8. Radiological impact of oil/gas industry

    Energy Technology Data Exchange (ETDEWEB)

    Botezatu, E.; Grecea, C. [Institute of Public Health, Iasi (Romania)

    2006-07-01

    The objective of this study was to assess the radiological impact on the environment and population of the oil/gas industry that is non-nuclear industry but uses and can produce materials, with an enhanced content of naturally occurring radionuclides. The natural radioactivity levels in the oil field environmental media, which could represent a risk for the people living in the areas influenced by this non-nar industry, do not indicate an increase in the natural radiation background. From a radiological point of view, the situation does not pose any immediate concern. Some places however need further investigations, with special emphasis on the control of 226 Ra releases to prevent from polluting the environment with this radionuclide. The growing concern amongst the population about the quality of their environment increases the significance of impact assessment of radioactive releases into the environment even if natural radionuclides occur. (N.C.)

  9. User questionnaire to evaluate the radiological workspace.

    Science.gov (United States)

    van Ooijen, Peter M A; Koesoema, Allya P; Oudkerk, Matthijs

    2006-01-01

    Over the past few years, an increase in digitalization of radiology departments can be seen, which has a large impact on the work of the radiologists. This impact is not only demonstrated by the increased use of digital images but also by changing demands on the whole reading environment. In this study, we evaluated the satisfaction of our radiologists with our digital Picture Archival and Communication System environment and their workspace. This evaluation was performed by distribution of a questionnaire consisting of a score sheet and some open questions to all radiologists and residents. Out of 25 questionnaires, 12 were adequately answered and returned. Results clearly showed that most problems were present in the area of reading room design and layout and comfort and ergonomics. Based on the results from this study, adaptations were made and the results were also used in the planning of the redesign of the entire department of radiology.

  10. NV/YMP RADIOLOGICAL CONTROL MANUAL

    Energy Technology Data Exchange (ETDEWEB)

    U.S. DEPARTMENT OF ENERGY, NATIONAL NUCLEAR SECURITY ADMINISTRATION NEVADA SITE OFFICE; BECHTEL NEVADA

    2004-11-01

    This manual contains the radiological control requirements to be used for all radiological activities conducted by programs under the purview of the U.S. Department of Energy (DOE), National Nuclear Security Administration Nevada Site Office (NNSA/NSO) and the Yucca Mountain Office of Repository Development (YMORD). Compliance with these requirements will ensure compliance with Title 10 Code of Federal Regulations Part 835 (10 CFR 835), Occupational Radiation Protection. Programs covered by this manual are located at the Nevada Test Site (NTS); Nellis Air Force Base and North Las Vegas, Nevada; Santa Barbara and Pleasanton, California; and at Andrews Air Force Base, Maryland. In addition, field work by NNSA/NSO at other locations is also covered by this manual.

  11. Cost-efficient Transition to Digital Radiology

    Directory of Open Access Journals (Sweden)

    M. F. Dhaenens

    2005-08-01

    Full Text Available Introduction & Background: The transition to digital radiology is a very natural and slow process driven by internal and environmental forces, like mobile phone, personal computer, DVD and satellite tech-nology. Radiology as a high technical supporting ser-vice in the hospital is changing by new imaging mo-dalities and the surrounding informatics. Nowadays all CT, ultrasound and MRI equipment is digital and forces radiologists to live with digital images. Even the policy-makers in healthcare see that the success-ful way to organize healthcare and certainly screen-ing programs is along informatics. Patients draw also benefits from digital images, as the quality of care improves. What is the right attitude of a radiologist in this evolution; is this a threat or an opportunity? What steps and decisions have to be made? One has to consider that this evolution to digital is unavoid-able and a way of no return, so it is better to join carefully and to invest in a progressive and clever way. Of course there are several manners to arrive at the digital radiology depending on your needs and the situation where you live. Full digital radiology requires some infrastructures like communication networks (telephone, fiber-optics, and satellite, the availability of digital modalities and detectors, local networks, digital archives, displays. Most of the nec-essary components are available on the market, but are still expensive (like high-resolution displays, digi-tal archives, and solid state detectors. Other invest-ments (like telecommunication are in the hands of the government. Historically most of PACS (Picture Archiving & Communications Systems are grown around a hardcopy network for CT, MRI and Ultra-sound, sharing a high throughput, high quality wet or dry laser printer. Other digital radiology solutions stem from HIS (Hospital Information Systems or CIS (Clinical Information Systems linked by a typical RIS (Radiological Information Systems. There are

  12. ‘An augury of the world’s ruin’ and the making of the tragic hero in Chinua Achebe’s Arrow of God

    Directory of Open Access Journals (Sweden)

    Ignatius Chukwumah

    2016-03-01

    Full Text Available Chinua Achebe’s Arrow of God has been adjudged by critics as a tragic work with Ezeulu as its tragic hero. However, none of these studies has paid detailed attention to the framing of Ezeulu in the historical context of his age. How he appears when compared to a classical Greek tragic hero has also been ignored. A major context giving rise to Ezeulu becoming a tragic hero is the period leading to the synthesis of two contrary histories, juxtaposed discourses and the collision of opposites and contraries in the sociocultural and political sphere of the villages of Umuaro and Okperi. This circumstance is captured by the narrator as ‘an augury of the world’s ruin’, by Nwaka as ‘the white man turned us upside down’ and by Ezeulu as ‘the world is spoilt and there is no longer head or tail in anything that is done’. Allen, an earlier District Commissioner in Things Fall Apart, but textually implicated in Arrow of God, terms it ‘great situations’. The above historical context requires more than mastery and acknowledgement by the tragic figure, in the absence of which he, a self-professed knowledgeable person, becomes a victim of what he failed to take into account. Consequently, he is set aside as a specimen for history and other men. This article will use Hegel’s and Aristotle’s theories of history and of tragedy, respectively, to explicate the above. It concludes that the tragic hero of Chinua Achebe’s Arrow of God is substantially the victim of the clash between Umuaro’s history and Hegel’s History.’n Teken van die wêreld se ondergang en die skepping van die tragiese held in Chinua Achebe se Arrow of God. Chinua Achebe se boek, Arrow of God, word deur kritici beskryf as ’n tragedie met die karakter Ezeulu as held. Niemand het egter noukeurige aandag geskenk aan hoe Ezeulu inpas in die gapings van botsende geskiedenisse soos vergestalt in die mens ten opsigte van hulle optredes, houdings, vrese en begeertes nie. Hoe

  13. Use of Process Improvement Tools in Radiology.

    Science.gov (United States)

    Rawson, James V; Kannan, Amogha; Furman, Melissa

    2016-01-01

    Process improvement techniques are common in manufacturing and industry. Over the past few decades these principles have been slowly introduced in select health care settings. This article reviews the Plan, Do, Study, and Act cycle, Six Sigma, the System of Profound Knowledge, Lean, and the theory of constraints. Specific process improvement tools in health care and radiology are presented in the order the radiologist is likely to encounter them in an improvement project.

  14. The radiological manifestations of sickle cell disease

    Energy Technology Data Exchange (ETDEWEB)

    Madani, G. [Department of Radiology, Royal Free Hospital NHS Trust, London (United Kingdom)]. E-mail: gittamadani@yahoo.com; Papadopoulou, A.M. [Department of Radiology, Royal Free Hospital NHS Trust, London (United Kingdom); Holloway, B. [Department of Radiology, Royal Free Hospital NHS Trust, London (United Kingdom); Robins, A. [Department of Paediatrics, Whittington Hospital NHS Trust, London (United Kingdom); Davis, J. [Department of Radiology, Whittington Hospital NHS Trust, London (United Kingdom); Murray, D. [Department of Radiology, Whittington Hospital NHS Trust, London (United Kingdom)

    2007-06-15

    Sickle cell disease (SCD) is an inherited abnormality of the ss-globin chain, which causes a spectrum of haemolytic anaemias. Clinical manifestations in SCD include anaemia, jaundice, recurrent vaso-occlusive crises, and infections (particularly by encapsulated bacteria) due to functional asplenia and cerebrovascular accidents. Radiological investigations play a critical role both in the diagnosis and in the primary prevention of the complications of SCD.

  15. Radiologic findings and follow-up evaluation

    Energy Technology Data Exchange (ETDEWEB)

    Kim, Young Tong; Kim, Cheol Hyun; Kim, Hyung Hwan; Shin, Hyeong Cheol; Bae, Won Kyung; Kim, Il Young [Soonchunhyang University, Chonan (Korea, Republic of)

    2003-07-01

    In esophageal perforation, fistulous tracts commonly occur between the esophagus and mediastinal or pleural spaces, but rarely between the esophagus and bronchi. The clinical manifestations and radiologic findings of esophageal perforation are nonspecfic, and diagnosis is the often delayed; esophagography is the standard technique for evaluation of its location and degree. CT is useful in demonstrating the extraluminal manifestations of esophageal perforation and for follow-up after medical treatment, and may depict the various manifestations of perforation, according to the causes.

  16. Fixation of Radiological Contamination; International Collaborative Development

    Energy Technology Data Exchange (ETDEWEB)

    Rick Demmer

    2013-03-01

    A cooperative international project was conducted by the Idaho National Laboratory (INL) and the United Kingdom’s National Nuclear Laboratory (NNL) to integrate a capture coating with a high performance atomizing process. The initial results were promising, and lead to further trials. The somewhat longer testing and optimization process has resulted in a product that could be demonstrated in the field to reduce airborne radiological dust and contamination.

  17. Preoperative radiological approach for hilar lung cancer

    Energy Technology Data Exchange (ETDEWEB)

    Ohno, Yoshiharu; Higashino, Takanori; Watanabe, Hirokazu; Yoshimura, Masahiro; Sugimura, Kazuro [Kobe Univ. (Japan). Graduate School of Medicine; Takenaka, Daisuke [Kobe Ekisaikai Hospital (Japan)

    2003-05-01

    Recent advances in CT, MR, and nuclear medicine have made it possible to evaluate morphological and functional information in hilar lung cancer patients more accurately and quantitatively. In this review, we describe recent advances in the radiological approach to hilar lung cancer, focusing on mediastinal invasion, lymph node metastasis, and pulmonary functional imaging. We believe that further basic studies as well as clinical applications of newer MR techniques will play an important role in the management of patients with lung cancer. (author)

  18. Nevada National Security Site Radiological Control Manual

    Energy Technology Data Exchange (ETDEWEB)

    Radiological Control Managers’ Council

    2012-03-26

    This document supersedes DOE/NV/25946--801, 'Nevada Test Site Radiological Control Manual,' Revision 1 issued in February 2010. Brief Description of Revision: A complete revision to reflect a recent change in name for the NTS; changes in name for some tenant organizations; and to update references to current DOE policies, orders, and guidance documents. Article 237.2 was deleted. Appendix 3B was updated. Article 411.2 was modified. Article 422 was re-written to reflect the wording of DOE O 458.1. Article 431.6.d was modified. The glossary was updated. This manual contains the radiological control requirements to be used for all radiological activities conducted by programs under the purview of the U.S. Department of Energy (DOE) and the U.S. Department of Energy, National Nuclear Security Administration Nevada Site Office (NNSA/NSO). Compliance with these requirements will ensure compliance with Title 10 Code of Federal Regulations (CFR) Part 835, 'Occupational Radiation Protection.' Programs covered by this manual are located at the Nevada National Security Site (NNSS); Nellis Air Force Base and North Las Vegas, Nevada; Santa Barbara and Livermore, California; and Andrews Air Force Base, Maryland. In addition, fieldwork by NNSA/NSO at other locations is covered by this manual. Current activities at NNSS include operating low-level radioactive and mixed waste disposal facilities for United States defense-generated waste, assembly and execution of subcritical experiments, assembly/disassembly of special experiments, the storage and use of special nuclear materials, performing criticality experiments, emergency responder training, surface cleanup and site characterization of contaminated land areas, environmental activity by the University system, and nonnuclear test operations, such as controlled spills of hazardous materials at the Hazardous Materials Spill Center. Currently, the major potential for occupational radiation exposure is associated with the burial of

  19. Current radiological status of Utirik Atoll

    Energy Technology Data Exchange (ETDEWEB)

    Robison, W L

    1998-08-01

    A preliminary radiological survey was conducted at Utirik Atoll in 1978 as part of the Northern Marshall Islands Radiological Survey (NMIRS). A dose assessment based on these limited data indicated a relatively low dose of about 0.12 mSv to people living on Utirik in 1978 (Robison et al., 1982). A much more detailed radiological survey was conducted in April of both 1993 and 1994. Aerial photos of the islands of Utirik Atoll were taken as part of the 1978 NMIRS. The sampling grids for the 1993 and 1994 surveys are shown overlaid on these aerial photos in Figures 1, 2, 3, and 4. External gamma measurements and a collection of either drinking coconuts or copra coconuts were made at each location. Pandanus, breadfruit, lime, and banana were collected where available. Ground water was collected in 1993/94 from four wells on Utirik Island and two wells on Aon Island. Surface soil and soil profiles were collected at some of the grid points on each of the islands at the atoll in 1993/94. A comparison of the number of samples collected in 1978 and 1993/94 are shown in Table 1. A detailed listing of the samples collected in the 1993/94 radiological survey at Utirik Atoll is given in Table 2. The number of vegetation samples collected in 1993/94 is nearly a factor of 7 greater than in 1978. Soil samples collected in 1993/94 exceeded the number collected in 1978 by more than a factor of 4. Consequently, extensive data are now available for the islands at Utirik Atoll and form the basis for the current dose assessment for the atoll.

  20. The role of interventional radiology in trauma

    Institute of Scientific and Technical Information of China (English)

    Douglas M. Coldwell

    2007-01-01

    @@ Introduction Interventional Radiology has evolved into a specialty having enormous input into the care of the traumatized patient. In all hospitals, regardless of size, the Interventional Radiologist must consider their relationships with the trauma service in order to quickly and efficiently render aid to the trauma victim. Such consideration should take place in the light of day as it seems that most trauma occurs in the middle of the night or another inconvenient time. The watchwords of trauma IR are speed and efficiency.