WorldWideScience

Sample records for broken arrows radiological

  1. Broken arrow: America's first lost nuclear weapon

    National Research Council Canada - National Science Library

    Leach, Norman

    2008-01-01

    .... Did an atomic bomb lie undetected for years in coastal British Columbia? Or was the nuclear weapon jettisoned and destroyed only miles from Canadian shores, becoming the world's first dirty bomb? Was this America's first lost nuclear weapon? Finally, and most baffling, did one of the missing crewmembers, the last man aboard, attempt to pilot the doomed aircraft back to its Alaskan base?"

  2. Arrows in Chemistry

    Indian Academy of Sciences (India)

    IAS Admin

    reaction conditions, reagents and catalysts used in the chemical reaction are written on the chemical reaction arrow. For example,. Arrows in chemistry can be broadly classified as 'reaction arrows' and 'electron arrows'. While the former is used to describe the state or progress of a chemical reaction, the latter is used to.

  3. Fractal-Flows and Time's Arrow

    OpenAIRE

    Susskind, Leonard

    2012-01-01

    This is the written version of a lecture at the KITP workshop on Bits, Branes, and Black Holes. In it I describe work with D. Harlow, S. Shenker, D. Stanford which explains how the tree-like structure of eternal inflation, together with the existence of terminal vacua, leads to an arrow-of-time. Conformal symmetry of the dS/CFT type is inconsistent with an arrow-of-time and must be broken. The presence in the landscape of terminal vacua leads to a new kind of attractor called a fractal-flow, ...

  4. Arrows in Chemistry

    Indian Academy of Sciences (India)

    Home; Journals; Resonance – Journal of Science Education; Volume 15; Issue 1. Arrows in Chemistry. Abirami Lakshminarayanan. General Article Volume 15 Issue 1 January 2010 pp 51-63. Fulltext. Click here to view fulltext PDF. Permanent link: http://www.ias.ac.in/article/fulltext/reso/015/01/0051-0063. Keywords. Arrows ...

  5. Formalizing Arrow's theorem

    Indian Academy of Sciences (India)

    Keywords. formalization of mathematics; Mizar; social choice theory; Arrow's theorem; Gibbard–Satterthwaite theorem; proof errors. ... Author Affiliations. Freek Wiedijk1. Institute for Computing and Information Sciences, Radboud University Nijmegen, Toernooiveld 1, 6525 ED Nijmegen, The Netherlands ...

  6. A broken catheter in the epidural space.

    Science.gov (United States)

    Anwari, Jamil S; Al-Wahbi, Yahya; Al-Nahdi, Saleh

    2014-04-01

    The Arrow FlexTip epidural catheter has reinforced coiled stainless steel wire, which facilitates its insertion and is less likely to puncture the blood vessels. However, as compared with non-reinforced, reinforced epidural catheters are more vulnerable to break. We report a case from Saudi Arabia on a retained fragment of a broken epidural catheter. Measures to prevent this mishap and its management are discussed.

  7. The Thermodynamical Arrow and the Historical Arrow; Are They Equivalent?

    Directory of Open Access Journals (Sweden)

    Martin Tamm

    2017-08-01

    Full Text Available In this paper, the relationship between the thermodynamic and historical arrows of time is studied. In the context of a simple combinatorial model, their definitions are made more precise and in particular strong versions (which are not compatible with time symmetric microscopic laws and weak versions (which can be compatible with time symmetric microscopic laws are given. This is part of a larger project that aims to explain the arrows as consequences of a common time symmetric principle in the set of all possible universes. However, even if we accept that both arrows may have the same origin, this does not imply that they are equivalent, and it is argued that there can be situations where one arrow may be well-defined but the other is not.

  8. Our broken death penalty

    National Research Council Canada - National Science Library

    Fletcher, William A

    2014-01-01

      A lecture entitled Our Broken Death Penalty is presented. But the title is misleading, for it suggests that America's death penalty might, at some earlier time, have been something other than broken...

  9. 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 Application...

  10. Arrow injuries to the eye

    African Journals Online (AJOL)

    Two male siblings aged 10 and 17 years, respectively, presented to our hospital with two days history of being shot in the right eyes with arrows. The patients presented with severe pains, bleeding, swelling, discharge and loss of vision. There was positive history of application of traditional eye medicine and an ...

  11. Arrow injuries to the eye

    African Journals Online (AJOL)

    Although arrow injuries involving other body parts are not uncommon in our environment, involvement of the eye in such injuries is rare. With limitation in availability of grazing land for the. Fulani tribal herdsmen, decreased water availability in the dry season in the northern parts of Nigeria, the conflict between these groups ...

  12. Broken or dislocated jaw

    Science.gov (United States)

    ... jaw; Fractured jaw; Fractured mandible; Broken jaw; TMJ dislocation; Mandibular dislocation ... needed to do this, particularly if repeated jaw dislocations occur. After dislocating your jaw, you should not ...

  13. 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.

  14. Arrow of time in dissipationless cosmology

    CERN Document Server

    Sahni, Varun; Toporensky, Aleksey

    2015-01-01

    It is generally believed that a cosmological arrow of time must be associated with entropy production. Indeed, in his seminal work on cyclic cosmology, Tolman introduced a viscous fluid in order to make successive expansion/contraction cycles larger than previous ones, thereby generating an arrow of time. However, as we demonstrate in this letter, the production of entropy is not the only means by which a cosmological arrow of time may emerge. Remarkably, systems which are dissipationless may nevertheless demonstrate a preferred direction of time provided they possess attractors. An example is provided by a homogeneous scalar-field driven cyclic cosmology where the presence of cosmological hysteresis causes an arrow of time to emerge in a system which is formally dissipationless.

  15. Arrow injury to the skull base

    African Journals Online (AJOL)

    in which the orbits is a prime target, are exceedingly rare.3. O'Neil et a1 presented a case of non-fatal transorbital penetrating arrow injury to the brain.I The case highlighted. WAJM VOL. 23 NO l, JANUARY ~ MARCH. 2004 the necessity for anterograde removal of the arrow in the direction of its lines of trajectory. Pandey et ...

  16. Optofluidic Lab-on-a-Chip Fluorescence Sensor Using Integrated Buried ARROW (bARROW) Waveguides.

    Science.gov (United States)

    Wall, Thomas; McMurray, Johnny; Meena, Gopikrishnan; Ganjalizadeh, Vahid; Schmidt, Holger; Hawkins, Aaron R

    2017-08-01

    Optofluidic, lab-on-a-chip fluorescence sensors were fabricated using buried anti-resonant reflecting optical waveguides (bARROWs). The bARROWs are impervious to the negative water absorption effects that typically occur in waveguides made using hygroscopic, plasma-enhanced chemical vapor deposition (PECVD) oxides. These sensors were used to detect fluorescent microbeads and had an average signal-to-noise ratio (SNR) that was 81.3% higher than that of single-oxide ARROW fluorescence sensors. While the single-oxide ARROW sensors were annealed at 300 °C to drive moisture out of the waveguides, the bARROW sensors required no annealing process to obtain a high SNR.

  17. Arrow injuries in North East Nigeria

    African Journals Online (AJOL)

    men 13%, and cattle theft 8%. Majority were clinically stable on presentation with arrows in the head, neck, chest and abdomen this resulted in various surgical procedures in order to remove the ar: rows and repair damaged viscera. Unstable presentations resulted in mortalities (4.1%) preoperatively. Wound in—.

  18. Broken or knocked out tooth

    Science.gov (United States)

    ... not need an emergency visit for a simple chip or a broken tooth that is not causing ... Center, Norwalk, CT. Review provided by VeriMed Healthcare Network. Also reviewed by David Zieve, MD, MHA, Isla ...

  19. 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 ...

  20. Femur Shaft Fractures (Broken Thighbone)

    Science.gov (United States)

    ... either in a long-leg splint or in skeletal traction. This is to keep your broken bones as ... and to maintain the length of your leg. Skeletal traction is a pulley system of weights and counterweights ...

  1. The affordances of broken affordances

    DEFF Research Database (Denmark)

    Grünbaum, Martin Gielsgaard; Simonsen, Jakob Grue

    2015-01-01

    We consider the use of physical and virtual objects having one or more affordances associated to simple interactions with them. Based on Kaptelinin and Nardi’s notion of instrumental affordance, we investigate what it means to break an affordance, and the two ensuing questions we deem most...... 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...... for design, particularly so for virtual artefacts, and that (B) there is a largely unexplored design space for designing, and redesigning objects with broken affordances, rather than broken or decayed objects....

  2. 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)....

  3. Arrow poisons in south Asia. Part 1. Arrow poisons in ancient India.

    Science.gov (United States)

    Bisset, N G; Mazars, G

    1984-10-01

    The use of arrow poisons in ancient India is discussed. While it is possible that Mesolithic hunting communities may have applied poison to their arrows, passages in the Rg Veda and Atharva Veda indicate its use in warfare. The meaning of the word -ala, used in the Rg Veda to denote the poison smeared on the arrowheads, is examined; but the available evidence, while almost certainly excluding a mineral (arsenical) source, does not allow a conclusion to be drawn between an animal and/or plant origin. Certain hymns in the Atharva Veda point to aconite tubers as one source. Later Sanskrit (and Buddhist) literature shows that poisoned arrows continued to be used and that a second source of poison was (putrefying) snakes--a source confirmed by an account in the classical literature of Alexander the Great's campaign in western India. Detailed descriptions of the symptoms and methods of treatment of wounds caused by poisoned arrows are to be found in the Sanskrit medical literature.

  4. 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.)

  5. DISLOCATED LIMINALITIES: ACHEBE'S RABID DOGS, ARROWS ...

    African Journals Online (AJOL)

    DR. CHIKE

    sacred python; totem of Idemili and Ezidemili, rivals to Ulu and Ezeulu. This is not a light issue. According to Achebe (1964:44):. Ezeulu‟s neighbour, Anosi, who was passing by branched in, and soon a big crowd had gathered. In the broken box lay an exhausted royal python. „May the Great Deity forbid,‟ said Anosi.

  6. Broken Ergodicity in MHD Turbulence

    Science.gov (United States)

    Shebalin, John V.

    2010-01-01

    Ideal magnetohydrodynamic (MHD) turbulence may be represented by finite Fourier series, where the inherent periodic box serves as a surrogate for a bounded astrophysical plasma. Independent Fourier coefficients form a canonical ensemble described by a Gaussian probability density function containing a Hermitian covariance matrix with positive eigenvalues. The eigenvalues at lowest wave number can be very small, resulting in a large-scale coherent structure: a turbulent dynamo. This is seen in computations and a theoretical explanation in terms of 'broken ergodicity' contains Taylor s theory of force-free states. An important problem for future work is the case of real, i.e., dissipative flows. In real flows, broken ergodicity and coherent structure are still expected to occur in MHD turbulence at the largest scale, as suggested by low resolution simulations. One challenge is to incorporate coherent structure at the largest scale into the theory of turbulent fluctuations at smaller scales.

  7. [Broken Racz catheter during application (case report)].

    Science.gov (United States)

    Karaman, Haktan; Oztürkmen Akay, Hatice; Turhanoğlu, Selim

    2006-01-01

    The most important complication of lumber disc hernia operations is Failed Back Surgery Syndrome (FBSS), which goes with fibrotic adhesions at the surgical site. The primary treatment applied to the cases that develop FBSS is the placement of Racz catheter under floroscopy and application of epidural neuroplasty which is a three-day procedure. However, this intervention, from which patients benefit a great deal, has some important complications during and after the application. One of these complications is that some pieces of Racz catheter may be broken out and retain at some levels of epidural space and subcutaneous tissue during placement and removal. General approach is to remove the retaining piece surgically. However, there is a less common view that, instead of removing the retaining piece, the patient should be followed up strictly and regularly in terms of neurologic complications. In our case, we decided to perform epidural neuroplasty to the patient diagnosed as FBSS. However, during the placement of the catheter, it was trapped in the left side of L5-S1 foramen by accident due to dense fibrotic tissues, and the subcutaneus part retained in the epidural space. Monthly follow-ups for 12 month were proposed to the patient, while surgery was not recommended. At the end of this period, no sign of infection was observed and neurologic and radiologic findings of the patient did not worsen. It is also interesting that a remarkable recovery was observed in the patient's clinical situation.

  8. Penetrating zone II neck injury by broken windshield.

    Science.gov (United States)

    Ozturk, Kayhan; Keles, Bahar; Cenik, Ziya; Yaman, Huseyin

    2006-03-01

    All penetrating neck wounds are potentially dangerous and require emergency treatment because there are important vessels, nerves and organs in the neck. We present the case of a patient who had an unusual penetrating neck injury caused by a broken windshield, noticed accidentally. Because fragments of windshield glass consist of sharp material, and the neck contains vital structures, such penetrating neck injury may cause life-threatening complications. Radiological examinations should be offered before the management of all neck wounds. The risk of retained foreign bodies and related complications can be prevented by using fluoroscopy during surgical exploration of the neck.

  9. Broken links and black boxes

    DEFF Research Database (Denmark)

    Sindbæk, Søren Michael

    2013-01-01

    Long-distance communication has emerged as a particular focus for archaeological exploration using network theory, analysis, and modelling. Initial attempts to adapt methods from social network analysis to archaeological data have, however, struggled to produce decisive results. This paper argues...... that the archaeological study of communication networks in the past calls for radically different analytical methods from those employed by most other forms of social network analysis. The fragmentary archaeological evidence presents researchers with the task of reconstructing the broken links of a ruined network from...

  10. 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.

  11. 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.

  12. 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.

  13. 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.)

  14. 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

  15. 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.

  16. 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.

  17. A Slot Machine, A Broken Test Tube

    Indian Academy of Sciences (India)

    IAS Admin

    BOOK │ REVIEW. A Slot Machine, A Broken. Test Tube. Vinita Shivakumar and. Dipshikha Chakravortty. A Slot Machine, A Broken Test. Tube – An Autobiography. Salvador Edward Luria. Harper Collins Publishers Inc.,. USA. 1984. 1st edn. 228 pp. (Original from the University of. Michigan). Price: Rs 60/-. Salvador Edward ...

  18. Investigating chemistry students' understanding of arrow-pushing formalism

    Science.gov (United States)

    Ferguson, Robert L.

    Starting with the simple premise that organic chemistry is hard, this research sought to provide information that can improve instruction. Unique to organic chemistry is the arrow-pushing formalism, a construct that describes the flow of electrons in an organic reaction. Little has been written about the teaching of arrow pushing formalism, and even less has been reported from a student's perspective. This study investigated differences in how undergraduate students in sophomore organic chemistry understood arrow pushing. Using a "think-aloud" protocol, 16 undergraduate chemistry majors each described their reasoning as they solved seven mechanism problems in a one-hour interview format. All interviews transcripts were given codes for analysis. These codes were analyzed using a qualitative approach for similarities and differences. Four overarching themes emerged from the analysis: (a) poor content knowledge becomes a barrier to success; (b) other non-arrow pushing barriers exist; (c) application of content knowledge facilitates success; and (d) problem solving strategies can either hinder or help answer the mechanism questions. Results can be summarized as follows: students defended their mechanistic route based on given structures; they manufactured answers in lieu of understanding fundamental concepts; and because, they know an answer does exist, they will invoke the mystical. In essence, students could provide a how, but were weak on why. The results suggested that the convention of arrow pushing formalism holds little meaning to the undergraduate student. This implies steps need to taken in the teaching of organic chemistry to rectify the problem. Some implications include emphasizing the themes of organic chemistry over the many details, rules and exceptions to the rules, relating arrow-pushing formalism (the microscopic/symbolic world) to the laboratory experience (the macroscopic world), and infusing active learning teaching strategies into the lecture

  19. 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.

  20. The Length of Time's Arrow

    Energy Technology Data Exchange (ETDEWEB)

    Feng, Edward H.; Crooks, Gavin E.

    2008-08-21

    An unresolved problem in physics is how the thermodynamic arrow of time arises from an underlying time reversible dynamics. We contribute to this issue by developing a measure of time-symmetry breaking, and by using the work fluctuation relations, we determine the time asymmetry of recent single molecule RNA unfolding experiments. We define time asymmetry as the Jensen-Shannon divergencebetween trajectory probability distributions of an experiment and its time-reversed conjugate. Among other interesting properties, the length of time's arrow bounds the average dissipation and determines the difficulty of accurately estimating free energy differences in nonequilibrium experiments.

  1. 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 ...

  2. The Effect of Arrow Mass and Shape on Penetration into a Target

    Science.gov (United States)

    Shyam, S.; Gurram, A.; Madireddy, S.

    2016-12-01

    We conducted an archery experiment in order to quantify how aerodynamic design impacted the depth of arrow impact. Research shows that the smaller the surface area of an object, the more easily it travels through the air and the deeper it penetrates a target (Benson 2014). Momentum also affects how far and fast the arrow will go and therefore, how deep it will penetrate into the target. Therefore, a combination of an arrow with greater momentum and better aerodynamics will help the arrow fly faster and penetrate the target deeper. Mass, velocity, momentum, acceleration, force, and drag are the factors that acted on our experiment and produced its results. We hypothesized that the arrow with a thin shaft and pointed arrowhead would penetrate deepest, as opposed to both arrows with no arrowheads or arrows with thick shafts and blunt arrowheads. We tested our hypothesis by having a well-trained archer shoot different types of arrows into a target. We used arrows with shaft lengths of 7 cm and 5.3 cm, coupled with either pointed, blunt, or no arrowhead. We measured the time to target and arrow penetration (in cm) to see which style reached the target the fastest and penetrated the deepest. The results demonstrated that arrows with thin shafts and pointed arrowheads penetrated our target the deepest, followed by arrows with thick shafts and blunt arrowheads. Arrows with thin shafts and blunt arrowheads came after, and arrows with thick shafts and pointed arrowheads came last in depth of penetration. The arrows with no arrowheads either barely penetrated the target, or bounced back. We were able to conclude that the thinner the shaft and the more pointed the arrowhead, the better the arrow cuts the air. This is because, according to the principles of aerodynamics, it creates less drag since the surface area is smaller. However, mass also plays an important role in force through momentum, which also significantly affected our results.

  3. Stochasticity, decoherence and an arrow of time from the ...

    Indian Academy of Sciences (India)

    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 ...

  4. First Observation of the Decay K^+ arrow π^+ γ γ

    Science.gov (United States)

    Adler, S.; Atiya, M. S.; Chiang, I.-H.; Frank, J. S.; Haggerty, J. S.; Kycia, T. F.; Li, K. K.; Littenberg, L. S.; Sambamurti, A.; Stevens, A.; Strand, R. C.; Witzig, C.; Louis, W. C.; Akerib, D. S.; Ardebili, M.; Convery, M. R.; Ito, M. M.; Marlow, D. R.; McPherson, R. A.; Meyers, P. D.; Selen, M. A.; Shoemaker, F. C.; Smith, A. J. S.; Blackmore, E. W.; Bryman, D. A.; Felawka, L.; Kitching, P.; Konaka, A.; Kujula, V.; Kuno, Y.; MacDonald, J. A.; Nakano, T.; Numano, T.; Padley, P.; Poutissou, J.-M.; Poutissou, R.; Roy, J.; Soluk, R.; Turcot, A. S.

    1996-05-01

    We report the first observation of the rare decay K^+ arrow π^+γγ. Using the BNL E787 detector, both the high and low invariant di-photon mass regions were studied. Our results are consistent with the predictions of Chrial Perturbation Theory with a small positive value for the parameter hatc.

  5. 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.}

  6. 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

  7. Renormalizations in softly broken SUSY gauge theories

    Science.gov (United States)

    Avdeev, L. V.; Kazakov, D. I.; Kondrashuk, I. N.

    1998-01-01

    The supergraph technique for calculations in supersymmetric gauge theories where supersymmetry is broken in a "soft" way (without introducing quadratic divergencies) is reviewed. By introducing an external spurion field the set of Feynman rules is formulated and explicit connections between the UV counterterms of a softly broken and rigid SUSY theories are found. It is shown that the renormalization constants of softly broken SUSY gauge theory also become external superfields depending on the spurion field. Their explicit form repeats that of the constants of a rigid theory with the redefinition of the couplings. The method allows us to reproduce all known results on the renormalization of soft couplings and masses in a softly broken theory. As an example the renormalization group functions for soft couplings and masses in the Minimal Supersymmetric Standard Model up to the three-loop level are calculated.

  8. Renormalizations in softly broken SUSY gauge theories

    Energy Technology Data Exchange (ETDEWEB)

    Avdeev, L.V.; Kazakov, D.I.; Kondrashuk, I.N. [Joint Inst. for Nuclear Research, Dubna (Russian Federation). Lab. of Theoretical Physics

    1998-01-19

    The supergraph technique for calculations in supersymmetric gauge theories where supersymmetry is broken in a ``soft`` way (without introducing quadratic divergencies) is reviewed. By introducing an external spurion field the set of Feynman rules is formulated and explicit connections between the UV counterterms of a softly broken and rigid SUSY theories are found. It is shown that the renormalization constants of softly broken SUSY gauge theory also become external superfields depending on the spurion field. Their explicit form repeats that of the constants of a rigid theory with the redefinition of the couplings. The method allows us to reproduce all known results on the renormalization of soft couplings and masses in a softly broken theory. As an example the renormalization group functions for soft couplings and masses in the minimal supersymmetric standard model up to the three-loop level are calculated. (orig.). 16 refs.

  9. 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...

  10. Measurement of the. pi. sup + r arrow e sup +. nu. branching ratio

    Energy Technology Data Exchange (ETDEWEB)

    Britton, D.I.; Ahmad, S.; Bryman, D.A.; Burnham, R.A.; Clifford, E.T.H.; Kitching, P.; Kuno, Y.; Macdonald, J.A.; Numao, T.; Olin, A.; Poutissou, J. (TRIUMF, Vancouver, British Columbia, V6T2A3 (Canada)); Dixit, M.S. (Center for Research in Particle Physics, Carleton University, Ottawa, Ontario, K1S5B6 (Canada))

    1992-05-18

    A new measurement of the {pi}{sup +}{r arrow}{ital e}{sup +}{nu} branching ratio gives {ital R}{sub {pi}{ital e}{nu}}={Gamma}({pi}{r arrow}{ital e}{nu}+{pi}{r arrow}{ital e}{nu}{gamma})/{Gamma} ({pi}{r arrow}{mu}{nu}+{pi}{r arrow}{mu}{nu}{gamma}) =(1.2265{plus minus}0.0034(stat){plus minus}0.0044(sys)){times}10{sup {minus}4}. This result is in agreement with standard model calculations and confirms the hypothesis of electron-muon universality at the 0.2% level.

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

    Directory of Open Access Journals (Sweden)

    Elizabeth Gire

    2014-08-01

    Full Text Available 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.

  12. Paediatric interventional radiology

    African Journals Online (AJOL)

    2016-06-29

    Jun 29, 2016 ... or the Trellis-8 (Bacchus Vascular, Santa Clara, CA) and. Arrow-Trerotola devices (Arrow International, Reading, PA). FIGURE 2: A 16-year-old girl with new chest masses: (a) Axial CT scan image demonstrates two masses in the right thoracic cavity; (b) Sonographic-guided percutaneous needle biopsy of ...

  13. Three-nucleon force and the A(y) puzzle in intermediate energy (p)over-right-arrow+d and (d)over-right-arrow+p elastic scattering

    NARCIS (Netherlands)

    Bieber, R; Glockle, W; Golak, J; Harakeh, MN; Huber, D; Huisman, H; Kalantar-Nayestanaki, N; Kamada, H; Messchendorp, JG; Nogga, A; Sakai, H; Sakamoto, N; Seip, M; Volkerts, M; van der Werf, SY; Witala, H

    2000-01-01

    New vector analyzing-power data on (p) over right arrow+ d elastic scattering at E-p = 150 and 190 MeV have been measured. These an presented together with existing data and with recent (d) over right arrow + p vector and tensor analyzing power data at E-d = 270 MeV. The strong negative extremum of

  14. Matter and antimatter: the two arrows of time

    OpenAIRE

    Villata, Massimo

    2009-01-01

    Antiparticles may be interpreted as ordinary particles travelling backwards in time and the two descriptions are considered equivalent, at least in special relativity and relativistic quantum mechanics. It is suggested that, vice versa, the discovery of antimatter should be the confirmation that our world is "endowed" with two opposite time-arrows and such a description could be more useful and convenient from the point of view of the understanding of the world itself, at least for a simple r...

  15. 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.

  16. 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

  17. ARTHROSCOPIC MENISCUS REPAIR WITH BIOABSORBABLE ARROWS IN LOCAL ANESTHESIA

    Directory of Open Access Journals (Sweden)

    Vladimir Senekovič

    2004-11-01

    Full Text Available Background. The menisci have important function in the knee joint. Because of this it is universally accepted that we have to preserve them as much as possible. After open and partially arthroscopic suture techniques new methods of all-inside meniscus repair with bioabsorbable arrows have been developed in the last decade. The meniscus repair using these arrows represents an easy task for a skilled surgeon. In addition, it can be performed in local anesthesia. We have evaluated the results of the first group of patients who were treated by this method.Methods. From February 2001 to August 2002 15 patients with torn meniscuses have been treated at the Clinical Department for Traumatology, University Medical centre, Ljubljana. We repaired their torn menisci arthroscopically with bioabsorbable arrows in local anesthesia. We divided patients in three groups: a group with isolated meniscus injury, a group with meniscus injury and anterior cruciate ligament injury and a group with associated pathology. Four patients had incarcerated meniscuses. Preoperative Lysholm score in the first group was 38, in the second 42 and in the third group 48. We repaired 12 medial and 3 lateral meniscuses. On average we need 45 minutes for therapeutic arthroscopy. Torn meniscus was fixated with minimum of 1 and maximum of 5 bioabsorbable arrows. All patients except one had the affected knee immobilized with cylinder plaster for 15 days on average.Results. At least three months after the arthroscopic fixation of the torn meniscus in local anesthesia another clinical evaluation was made. In all groups significant improvement was observed regarding the range of motions and absence of pain. Postoperative Lysholm score in the first group was 89, in the second 75 and in the third 71. Average deficit of flexion was 3 degrees while extension was full. One patient complained about the same pain in the joint, he underwent another arthroscopy which showed that the meniscus was

  18. Of Slot Machines and Broken Test Tubes

    Indian Academy of Sciences (India)

    Home; Journals; Resonance – Journal of Science Education; Volume 19; Issue 5. Of Slot Machines and Broken Test Tubes. S Mahadevan. General Article Volume 19 Issue 5 May 2014 pp 395-405. Fulltext. Click here to view fulltext PDF. Permanent link: http://www.ias.ac.in/article/fulltext/reso/019/05/0395-0405. Keywords.

  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

  20. PERIODIC-SOLUTIONS IN SPONTANEOUSLY BROKEN THEORIES

    NARCIS (Netherlands)

    BRIHAYE, Y; KUNZ, J

    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. 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.

  2. Dental radiology.

    Science.gov (United States)

    Woodward, Tony M

    2009-02-01

    Dental radiology is the core diagnostic modality of veterinary dentistry. Dental radiographs assist in detecting hidden painful pathology, estimating the severity of dental conditions, assessing treatment options, providing intraoperative guidance, and also serve to monitor success of prior treatments. Unfortunately, most professional veterinary training programs provide little or no training in veterinary dentistry in general or dental radiology in particular. Although a technical learning curve does exist, the techniques required for producing diagnostic films are not difficult to master. Regular use of dental x-rays will increase the amount of pathology detected, leading to healthier patients and happier clients who notice a difference in how their pet feels. This article covers equipment and materials needed to produce diagnostic intraoral dental films. A simplified guide for positioning will be presented, including a positioning "cheat sheet" to be placed next to the dental x-ray machine in the operatory. Additionally, digital dental radiograph systems will be described and trends for their future discussed.

  3. Time arrow is influenced by the dark energy.

    Science.gov (United States)

    Allahverdyan, A E; Gurzadyan, V G

    2016-05-01

    The arrow of time and the accelerated expansion are two fundamental empirical facts of the universe. We advance the viewpoint that the dark energy (positive cosmological constant) accelerating the expansion of the universe also supports the time asymmetry. It is related to the decay of metastable states under generic perturbations, as we show on example of a microcanonical ensemble. These states will not be metastable without dark energy. The latter also ensures a hyperbolic motion leading to dynamic entropy production with the rate determined by the cosmological constant.

  4. 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.

  5. Ratchet device with broken friction symmetry

    DEFF Research Database (Denmark)

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

    2002-01-01

    An experimental setup (gadget) has been made for demonstration of a ratchet mechanism induced by broken symmetry of a dependence of dry friction on external forcing. This gadget converts longitudinal oscillating or fluctuating motion into a unidirectional rotation, the direction of which is in ac...... is in accordance with given theoretical arguments. Despite the setup being three dimensional, the ratchet rotary motion is proved to be described by one simple dynamic equation. This kind of motion is a result of the interplay of friction and inertia.......An experimental setup (gadget) has been made for demonstration of a ratchet mechanism induced by broken symmetry of a dependence of dry friction on external forcing. This gadget converts longitudinal oscillating or fluctuating motion into a unidirectional rotation, the direction of which...

  6. Effective field theory of broken spatial diffeomorphisms

    Energy Technology Data Exchange (ETDEWEB)

    Lin, Chunshan [Yukawa Institute for Theoretical Physics, Kyoto University,Kitashirakawa Oiwakecho, Sakyo-ku, Kyoto 606-8502 (Japan); Kavli Institute for the Physics and Mathematics of the Universe (WPI),The University of Tokyo Institutes for Advanced Study, The University of Tokyo,Kashiwa, Chiba 277-8583 (Japan); Labun, Lance Z. [Department of Physics, University of Texas,2515 Speedway, MS #C1510, Austin, TX 78712-1068 (United States); Department of Physics, National Taiwan University,No. 1, Sec. 4, Roosevelt Road, Taipei 10617, Taiwan (China); Leung Center for Cosmology and Particle Astrophysics (LeCosPA), National Taiwan University,No. 1, Sec. 4, Roosevelt Road, Taipei 10617, Taiwan (China)

    2016-03-17

    We study the low energy effective theory describing gravity with broken spatial diffeomorphism invariance. In the unitary gauge, the Goldstone bosons associated with broken diffeomorphisms are eaten and the graviton becomes a massive spin-2 particle with 5 well-behaved degrees of freedom. In this gauge, the most general theory is built with the lowest dimension operators invariant under only temporal diffeomorphisms. Imposing the additional shift and SO(3) internal symmetries, we analyze the perturbations on a FRW background. At linear perturbation level, the observables of this theory are characterized by five parameters, including the usual cosmological parameters and one additional coupling constant for the symmetry-breaking scalars. In the de Sitter and Minkowski limit, the three Goldstone bosons are supermassive and can be integrated out, leaving two massive tensor modes as the only propagating degrees of freedom. We discuss several examples relevant to theories of massive gravity.

  7. 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.

  8. Monosomy 9p24{r_arrow}pter and trisomy 5q31{r_arrow}qter: Case report and review of two cases

    Energy Technology Data Exchange (ETDEWEB)

    Schimmenti, L.A.; Steinberger, J.; Mammel, M.C. [Univ. of Minnesota, Minneapolis, MN (United States)] [and others

    1995-05-22

    Partial deletion of the short arm of chromosome 9 (p24{r_arrow}pter) and partial duplication of the long arm of chromosome 5 (q32{r_arrow}qter) were observed in an abnormal boy who died at age 8 weeks of a complex cyanotic cardiac defect. He also had minor anomalies, sagittal craniosynostosis, triphalangeal thumbs, hypospadias, and a bifid scrotum. Two other infants with similar cytogenetic abnormalities were described previously. These patients had severe congenital heart defect, genitourinary anomalies, broad nasal bridge, low hairline, apparently low-set ears, short neck, and triphalangeal thumbs, in common with our patient. We suggest that combined monosomy 9q23,24{r_arrow}pter and trisomy 5q31,32{r_arrow}qter may constitute a clinically recognizable syndrome. 13 refs., 2 figs., 2 tabs.

  9. Search for the flavor changing neutral current B-meson decays B^+arrow μ^+ μ^- K^+ and B^0arrow μ^+ μ^-K^*0 at CDF.

    Science.gov (United States)

    Erdmann, Wolfram; Speer, Thomas

    1997-04-01

    We present a search for rare B-meson decays B^+arrow μ^+ μ^- K^+ and B^0arrow μ^+ μ^-K^*0 using data from pbarp collisions at √s = 1.8 TeV recorded with CDF during the 1994 to 95 running period. We set upper limits on BR(B^+arrow μ^+ μ^- K^+) and BR(B^0arrow μ^+ μ^-K^*0). ^ Supported by U.S. DOE DE-AC02-76CH03000. ^*We thank the Fermilab staff and the technical staffs of the participating institutions for their vital contributions. This work was supported by the U.S. Department of Energy and National Science Foundation; the Italian Instituto Nazionale di Fisica Nucleare; the Ministry of Education, Science and Culture of Japan; the Natural Sciences and Engineering Research Council of Canada; the National Science Council of the Republic of China; and the A. P. Sloan Foundation.

  10. The dark arrow of time a scientific novel

    CERN Document Server

    Villata, Massimo

    2017-01-01

    This riveting scientific novel combines adventure, love, suspense, magic, pathos, and mystery in a carefully woven plot that is full of unexpected twists and turns. The author is an astrophysicist who has developed an alternative theory, which holds that traveling in time is possible. Time is, in fact, the real protagonist of the novel and of the intrigue surrounding the attempt to seize the secret of Time’s other arrow, the dark arrow normally hidden from us, which points back at our past. The underlying premise is that antimatter is nothing more than common matter moving backwards in time. The justification for this interpretation has been with us for some time, “hiding in plain sight” within Maxwell’s equations, the Lorentz transformations, the CPT theorem of relativistic quantum mechanics, and Feynman diagrams. While the science underlying the narrative is explained whenever necessary, sometimes with the aid of simple mathematical formulas, these scientific asides account for only a small part of ...

  11. Arrow injury to the skull base | Ogunleye | West African Journal of ...

    African Journals Online (AJOL)

    An unsual case of penetrating nasal injury with middle skull base involvement, from fired arrow is reported. The arrow was surgically removed and the patient remains well with no sequelae. We therefore present this case because of its rarity. The anatomical principles underlying the surgical management of the lesions are ...

  12. Study of Gluon versus Quark Fragmentation in Υ arrow g g γ and e^+ e^- arrow q barq γ Events at √s=10 GeV.

    Science.gov (United States)

    Besson, Dave

    1997-04-01

    Using data collected with the CLEO II detector at the Cornell Electron Storage Ring, we determine the ratio R_chrg for the mean charged multiplicity observed in Υ(1S) arrow g g γ events, , to the mean charged multiplicity observed in e^+e^- arrow q barq γ events, . We find R_chrg = / = 1.04 ± 0.02(stat) ± 0.05(syst) for jet energies less than 7 GeV.

  13. Suitability of Broken Bottles as Fine Aggregate for Production of ...

    African Journals Online (AJOL)

    The use of broken bottles as partial replacement of river sand for production of concrete was investigated. The grading of the broken bottles and sand fell in zone II. The specific gravity of the bottles was 2.55 and that of sand was 2.65. Sand was replaced with the broken bottles in the proportions of 0%, 10%, 20%, 30%, 40%, ...

  14. 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.

  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. Successful management of a broken epidural catheter!!!

    Science.gov (United States)

    Hippalgaonkar, Amruta Vinod; Kudalkar, Amala G; Gaikwad, Smita M; Modak, Shailendra; Gupta, Hema B; Tendolkar, Bharati A

    2017-01-01

    Breakage of epidural catheter though rare is a well-known but worrisome complication. Visualization of retained catheter is difficult even with modern radiological imaging techniques, and active surgical intervention might be necessary for removal of catheter fragment. We report such a case of breakage of an epidural catheter during its removal which led to surgical intervention.

  17. Successful management of a broken epidural catheter!!!

    Directory of Open Access Journals (Sweden)

    Amruta Vinod Hippalgaonkar

    2017-01-01

    Full Text Available Breakage of epidural catheter though rare is a well-known but worrisome complication. Visualization of retained catheter is difficult even with modern radiological imaging techniques, and active surgical intervention might be necessary for removal of catheter fragment. We report such a case of breakage of an epidural catheter during its removal which led to surgical intervention.

  18. 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...

  19. The approach channel control structure at Arrow Lakes Generating Station

    Energy Technology Data Exchange (ETDEWEB)

    Stevenson, A. [Columbia Power Corp., Victoria, BC (Canada); Gemperline, G. [Franklin G. DeFazio Inc., Camano Island, WA (United States); Christison, K. [Northwest Hydraulic Consultants Ltd., Vancouver, BC (Canada); Zipparro, V. [MWH Americas Inc., Broomfield, CO (United States)

    2009-07-01

    In 1999, the Columbia Power Corporation partnered with Columbia Basin Trust and Klohn Crippen SNC Lavalin to develop a project to add generation capability to the Arrow Reservoir, the Arrow Lakes Generating Station (ALGS). Construction was completed in the spring of 2002. The hydroelectric development consists of a 185 MW two-unit powerhouse constructed 400 m downstream of the existing dam. Coordinated mathematical and physical model studies were conducted to design a 35 m wide by 9.4 m high approach channel control structure (ACCS) 200 m upstream of the ALGS. The purpose of the ACCS is to control water levels during abnormal and unexpected operations of the powerhouse and prevent uplift of the concrete channel lining. The discharge capacity of the submerged weir was determined by unsteady open channel modelling. Prototype observations following completion of the structure correlated well with simulated behaviour. Analytical methods were used to optimize flow over the ACCS in order to develop design parameters for the structure. The physical model verified potential ACCS impacts on powerhouse performance parameters. It showed that there would be some reduction in uniformity of the intake flow distribution and a small improvement in vorticity. The study also identified operation restrictions, such as discharge, head loss and rate of flow change restrictions. A series of modifications were considered in the design, such as weir location along the approach channel, crest height, shape of the weir, and future operational consideration. The minor increase in head loss resulted in approximately 2 per cent reduction in average annual energy generation. 16 figs.

  20. Arrow physicians: are economics and medicine philosophically incompatible?

    Science.gov (United States)

    Tsang, Sandro

    2015-06-01

    Economics is en route to its further expansion in medicine, but many in the medical community remain unconvinced that its impact will be positive. Thus, a philosophical enquiry into the compatibility of economics and medicine is necessary to resolve the disagreements. The fundamental mission of medicine obliges physicians to practise science and compassion to serve the patient's best interests. Conventional (neoclassical) economics assumes that individuals are self-interested and that competitive markets will emerge optimal states. Economics is seemingly incompatible with the emphasis of putting patients' interests first. This idea is refuted by Professor Kenneth Arrow's health economics seminal paper. Arrow emphasizes that medical practice involves agency, knowledge, trust and professionalism, and physician-patient relation critically affects care quality. The term Arrow Physician is used to mean a humanistic carer who has a concern for the patient and acts on the best available evidence with health equity in mind. To make this practice sustainable, implementing appropriate motivations, constitutions and institutions to enable altruistic agency is critical. There is substantial evidence that polycentric governance can encourage building trust and reciprocity, so as to avoid depletion of communal resources. This paper proposes building trusting institutions through granting altruistic physicians adequate autonomy to direct resources based on patients' technical needs. It also summarizes the philosophy bases of medicine and economics. It, therefore, contributes to developing a shared language to facilitate intellectual dialogues, and will encourage trans-disciplinary research into medical practice. This should lead to medicine being reoriented to care for whole persons again. © 2015 John Wiley & Sons, Ltd.

  1. The physics of time and the arrow thereof

    Science.gov (United States)

    Hecht, Eugene

    2018-01-01

    Although the physics of time is of fundamental importance, the concept gets little attention in most introductory courses. Still, we now know enough to begin to formulate a coherent account of the physical nature of time. Newton’s absolute time has given way to Leibniz’s relational time. From Relativity Theory we learn that time in addition to being relational is also relative, and local; as we will see, the rates at which events unfold are influenced by both the relative velocity of the observer, and the local gravitational field strength—time is not universal. The intrinsic relationship between light-speed and time will be examined via relativity. Moreover, it will be shown that the Special Theory requires that the quanta of the electromagnetic field (i.e. photons), only exist at speed c; the ramifications of that extraordinary property, coupled with conservation of energy, profoundly influence the progression of time. Time in our everyday lives is the abstract measure of the unfolding of macroscopic occurrences, all of which are irreversible. It is posited that these events are irreversible because they are invariably accompanied by the emission of radiant energy, photons and/or gravitons. By contrast, entropy is a descriptor of processes, it is not a causative agency; although correlated with the so-called arrow-of-time, it cannot be its cause. Using a variety of physical thought experiments, it will be shown that the unidirectional ‘flow’ of time, the arrow-of-time, is a result of the fact that energy quanta only travel toward the future. That is the fundamental asymmetry in our otherwise temporally symmetric physics.

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

    OpenAIRE

    Beltrame, Bruno

    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...

  3. A Note on Partial Insurance and the Arrow-Pratt Measure of Risk Aversion

    OpenAIRE

    W. Henry Chiu

    2005-01-01

    Pratt [1964] establishes that a more risk-averse individual in the Arrow-Pratt sense has a higher compensating risk premium for full insurance, but no comparable result has been established for partial insurance. Ross [1981] shows that a more risk-averse individual in the Arrow-Pratt sense may not be willing to pay more for a reduction in risk in the sense of mean-preserving contraction. We show that a more risk-averse individual in the Arrow-Pratt sense has a higher compensating risk premium...

  4. Improved search for massive neutrinos in. pi. sup + r arrow e sup +. nu. decay

    Energy Technology Data Exchange (ETDEWEB)

    Britton, D.I.; Ahmad, S.; Bryman, D.A.; Burnham, R.A.; Clifford, E.T.H.; Kitching, P.; Kuno, Y.; Macdonald, J.A.; Numao, T.; Olin, A.; Poutissou, J. (TRIUMF, Vancouver, British Columbia, V6T 2A3 (Canada)); Dixit, M.S. (Center for Research in Particle Physics, Carleton University, Ottawa, K1S 5B6 (Canada))

    1992-08-01

    Evidence of massive neutrinos was sought in the {pi}{sup +}{r arrow}{ital e}{sup +}{nu} decay spectrum with the background from the {pi}{r arrow}{mu}{r arrow}{ital e} decay chain highly suppressed. Upper limits (90% C.L.) were set on the neutrino mixing parameter {vert bar}{ital U}{sub {ital e}{ital i}}{vert bar}{sup 2}{lt}10{sup {minus}7} in the mass region 50{lt}{ital m}{sub {nu}}{lt}130 MeV/{ital c}{sup 2}.

  5. Attention orienting by eye gaze and arrows reveals flexibility to environmental changes.

    OpenAIRE

    Zhao, Shuo; Uono, Shota; Yoshimura, Sayaka; Toichi, Motomi

    2014-01-01

    This study aimed to evaluate the difference in non-predictive cues between gaze and arrows in attention orienting. Attention orienting was investigated with gaze or arrows as separate cues in a simple condition (i.e., block design) in Experiment 1 and in an unpredictable condition (i.e., randomized design) in Experiment 2. Two kinds of sound (voice and tone) stimuli were used as targets. Results showed that gaze and arrow cues induced enhanced attention orienting to a voice versus tone target...

  6. Ratchet due to broken friction symmetry

    DEFF Research Database (Denmark)

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

    2002-01-01

    with it have been carried out. In this device, an asymmetry of friction dependence on an applied force appears, resulting in rectification of rotary motion, In experiments, our setup is observed to rotate only in one direction, which is in accordance with given theoretical arguments, Despite the setup being...... three dimensional, the ratchet rotary motion is proved to be described by one dynamical equation. This kind of motion is a result of the interplay of friction and inertia. We also consider a case with viscous friction, which is irrelevant to this gadget, but it can be a possible mechanism of rotary......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...

  7. Broken Symmetries and the Higgs Boson

    Directory of Open Access Journals (Sweden)

    Horváth Dezső

    2014-01-01

    Full Text Available The 40 years old Standard Model, the theory of particle physics, seems to describe all experimental data very well. The theory is based on symmetries, some of them are broken, mostly by the weak interaction. All of its elementary particles were identified and studied apart from the Higgs boson until 2012, when the two main experiments of the Large Hadron Collider at CERN, CMS and ATLAS observed a new particle with properties close to those predicted for the Higgs boson. The discovery of the Higgs boson proves the validity of the Brout-Englert-Higgs mechanism of spontaneous symmetry breaking and François Englert and Peter Higgs received the 2013 Nobel Prize in Physics. There are several questions yet concerning the possible theoretical significance of the mass of the new particle.

  8. 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.

  9. SA Journal of Radiology

    African Journals Online (AJOL)

    Journal Homepage Image. The SA Journal of Radiology is the official journal of the Radiological Society of South Africa and the Professional Association of Radiologists in South Africa and Namibia. The SA Journal of Radiology is a general diagnostic radiological journal which carries original research and review articles, ...

  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. Search for the decay. pi. sup 0 r arrow. gamma. + X

    Energy Technology Data Exchange (ETDEWEB)

    Atiya, M.S.; Chiang, I.; Frank, J.S.; Haggerty, J.S.; Ito, M.M.; Kycia, T.F.; Li, K.K.; Littenberg, L.S.; Stevens, A.J.; Sambamurti, A.; Strand, R.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.; Marlow, D.R.; Meyers, P.D.; Selen, M.A.; Shoemaker, F.C.; Smith, A.J.S. (Joseph Henry Laboratories, Princeton University, Princeton, New Jersey 08544 (United States)); Blackmore, E.W.; Bryman, D.A.; Felawka, L.; Kitching, P.; Konaka, A.; Kuno, Y.; Macdonald, J.A.; Numao, T.; Padley, P.; Poutissou, J.; Poutissou, R.; Roy, J.; Turcot, A.S. (TRIUMF, Vancouver, British Columbia, V6T2A3 (Canada))

    1992-08-03

    A search for the decay {pi}{sup 0}{r arrow}{gamma}{ital X}, where {ital X} is any long-lived weakly interacting neutral vector particle with mass smaller than the neutral pion pass, was performed using neutral pions tagged by {ital K}{sup +}{r arrow}{pi}{sup +}{pi}{sup 0}. A 90%-C.L. upper limit for the branching ratio of the two-body decay {ital B}({pi}{sup 0}{r arrow}{gamma}{ital X}){lt}5{times}10{sup {minus}4} is set. Limits are also set for three-body decays {pi}{sup 0}{r arrow}{gamma}{ital XX}{prime}.

  12. 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

  13. Logotherapy Counseling to Improve Acceptance of Broken Home Child

    Directory of Open Access Journals (Sweden)

    Erwin Erlangga

    2017-08-01

    Full Text Available This study aims to increase the enrollment of children of a broken home that life has meaning. Subjects are 100 children in Demak whose families experiencing divorce. Research themes include three things: individual counseling, engineering logotherapy, reception, and a child of a broken home. Data obtained based on interviews, observation, and psychological scale showed that of the 100 children of a broken home has a low acceptance that individual counseling with logotherapy techniques were considered appropriate to increase the enrollment of children of a broken home. Factors - factors that affect the acceptance of a child of a broken home is self-blame, anger and did not have a purpose in life again. In addition the environment is also a significant effect on the enrollment of children of a broken home. Environmental labeling of families experiencing divorce as a family that failed so that children are increasingly stressed with the stamp of the community. Based on the field test results, the level of acceptance of the child of a broken home increases after the individual is given counseling services with logotherapy techniques. Indicated by changes in the level of acceptance of children of a broken home before being given treatment (initial evaluation and after (final evaluation of 130 points. The results of effectiveness test statistic t test calculations also showed 0,010 <0.05.It was concluded that counseling individuals with logotherapy effective technique to increase the enrollment of children of a broken home

  14. Father Time. I. Does the Cosmic Microwave Background Radiation Provide a Universal Arrow of Time ?

    OpenAIRE

    Dastidar, T K Rai

    1999-01-01

    The existence of a non-thermodynamic arrow of time was demonstrated in a recent paper (Mod.Phys.Lett. A13, 1265 (1998)), in which a model of non-local Quantum Electrodynamics was formulated through the principle of gauge invariance. In this paper we show that the Cosmic Microwave Background Radiation is capable of making every particle of the universe (except those which are not acted upon by an electromagnetic field) follow this arrow of time.

  15. The possible source of the causal time arrow in geo-historical explanations

    Directory of Open Access Journals (Sweden)

    Gadi Kravitz

    2017-05-01

    Full Text Available My argument in this article, will be that nature, in general, and human nature in particular, suggests that, in principle, it is possible to derive the causal time arrow from several physical time arrows existing in nature and appearing to be unidirectional and irreversible phenomena. A more concrete argument will be that the assumption of a causal time arrow to which geologists resort in all geo-historical explanations, apparently originates in geo-historical time arrows concealed in unidirectional and irreversible physical-geological processes. I will illustrate this claim with a few examples of geo-historical explanations in the theory of plate tectonics, most of which are based on irreversible geo-physical processes. My final argument is a broader, of an epistemological nature, according to which the causal time arrow assumption used in logical-causative explanations in everyday life and in science, apparently “derives” in a way from the geo-historical time arrow. I will base this argument on the causal relationship and mutual influence that occurs in nature between geo-historical and evolutionary processes in animals, including developmental processes of the human brain and mind. From this reductionist argument, nicely integrated in the framework of evolutionary epistemology (EEM, it is possible to derive a wider naturalistic argument according to which, on principle, the laws of geo-historical physics can be reduced to the laws of logic and causality.

  16. 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.

  17. DNA → RNA: What Do Students Think the Arrow Means?

    Science.gov (United States)

    Wright, L Kate; Fisk, J Nick; Newman, Dina L

    2014-01-01

    The central dogma of molecular biology, a model that has remained intact for decades, describes the transfer of genetic information from DNA to protein though an RNA intermediate. While recent work has illustrated many exceptions to the central dogma, it is still a common model used to describe and study the relationship between genes and protein products. We investigated understanding of central dogma concepts and found that students are not primed to think about information when presented with the canonical figure of the central dogma. We also uncovered conceptual errors in student interpretation of the meaning of the transcription arrow in the central dogma representation; 36% of students (n = 128; all undergraduate levels) described transcription as a chemical conversion of DNA into RNA or suggested that RNA existed before the process of transcription began. Interviews confirm that students with weak conceptual understanding of information flow find inappropriate meaning in the canonical representation of central dogma. Therefore, we suggest that use of this representation during instruction can be counterproductive unless educators are explicit about the underlying meaning. © 2014 L. K. Wright et al. CBE—Life Sciences Education © 2014 The American Society for Cell Biology. This article is distributed by The American Society for Cell Biology under license from the author(s). It is available to the public under an Attribution–Noncommercial–Share Alike 3.0 Unported Creative Commons License (http://creativecommons.org/licenses/by-nc-sa/3.0).

  18. 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...

  19. 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.

  20. 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.

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

    Science.gov (United States)

    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.

  2. Softly broken finite supersymmetric grand unified theory

    Energy Technology Data Exchange (ETDEWEB)

    Kazakov, D.I. [Joint Inst. for Nucl. Res., Dubna (Russian Federation). Bogoliubov Lab. of Theor. Phys.; Kalmykov, M.Yu. [Joint Inst. for Nucl. Res., Dubna (Russian Federation). Bogoliubov Lab. of Theor. Phys.; Kondrashuk, I.N. [Joint Inst. for Nucl. Res., Dubna (Russian Federation). Bogoliubov Lab. of Theor. Phys.; Gladyshev, A.V. [Physics Department, Moscow State University, 119 899 Moscow (Russian Federation)

    1996-07-15

    In the context of the standard SUSY GUT scenario, we present a detailed analysis of the softly broken finite supersymmetric grand unified theory. The model, albeit nonminimal, remains very rigid due to the requirement of finiteness. It is based on the SU(5) gauge group and is UV finite to all orders of perturbation theory. It contains three generations of the matter fields together with four pairs of Higgses. The requirement of UV finiteness fixes all the Yukawa couplings at the GUT scale. Imposing the condition of universality on the soft couplings at the Planck scale and then extending the condition of finiteness to them, one gets a completely finite unified theory above M{sub GUT}. This makes the fine-tuning procedure more meaningful and leads to the usual Minimal Supersymmetric Standard Model below M{sub GUT}. All the masses of the ordinary particles including Higgses are obtained due to the Higgs mechanism at the electro-weak scale. The hierarchy of quark and lepton masses is related to that of v.e.v.`s of the Higgs fields and is governed by the Higgs mixing matrix in the generation space. Superpartners develop their masses according to the RG equations starting from the soft terms at the Planck scale. The suggestion of complete finiteness and maximal simplicity of the unified theory leads to the connection between the initial values of soft SUSY breaking parameters, namely m{sub 0}{sup 2}=1/3m{sub 1/2}{sup 2}, A{sub t}=A{sub b}=A{sub {tau}}=-m{sub 1/2}, B=-m{sub 1/2}, so that the number of free parameters is less than that of the MSSM. (orig.).

  3. Softly broken finite supersymmetric grand unified theory

    Science.gov (United States)

    Kazakov, D. I.; Kalmykov, M. Yu.; Kondrashuk, I. N.; Gladyshev, A. V.

    1996-02-01

    In the context of the standard SUSY GUT scenario, we present a detailed analysis of the softly broken finite supersymmetric grand unified theory. The model, albeit nonminimal, remains very rigid due to the requirement of finiteness. It is based on the SU(5) gauge group and is UV finite to all orders of perturbation theory. It contains three generations of the matter fields together with four pairs of Higgses. The requirement of UV finiteness fixes all the Yukawa couplings at the GUT scale. Imposing the condition of universality on the soft couplings at the Planck scale and then extending the condition of finiteness to them, one gets a completely finite unified theory above MGUT. This makes the fine-tuning procedure more meaningful and leads to the usual Minimal Supersymmetric Standard Model below MGUT. All the masses of the ordinary particles including Higgses are obtained due to the Higgs mechanism at the electro-weak scale. The hierarchy of quark and lepton masses is related to that of v.e.v.'s of the Higgs fields and is governed by the Higgs mixing matrix in the generation space. Superpartners develop their masses according to the RG equations starting from the soft terms at the Planck scale. The suggestion of complete finiteness and maximal simplicity of the unified theory leads to the connection between the initial values of soft SUSY breaking parameters, namely m 02 = {1}/{3}m {1}/{2}2, A t = A b = A τ= -m {1}/{2}, B = -m {1}/{2}, so that the number of free parameters is less than that of the MSSM.

  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. Renormalization in the gauge theories with spontaneously broken supersymmetry

    CERN Document Server

    Kazakov, D I; Velizhanin, V N; Kondrashuk, I N

    2001-01-01

    A review of recent results on renormalizations in gauge theories with spontaneously broken supersymmetry is given. It is shown that the renormalizations in a broken theory are completely defined by those in a rigid theory and may be obtained with the help of expansion over the Grassmannian variables. New exact as well as suitable approximate analytic solutions of the renormalization group equations are obtained in some particular models: the Minimal Supersymmetric Standard Model, supersymmetric Grand Unified Theories, softly broken finite theories, and N=2 supersymmetric Seiberg-Witten theory

  6. 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.

  7. tau. - e and. tau. -. mu. universality from. tau. r arrow. pi. nu. decays

    Energy Technology Data Exchange (ETDEWEB)

    Bryman, D.A. (TRIUMF, 4004 Wesbrook Mall, Vancouver, British Columbia, V6T 2A3 (Canada))

    1992-08-01

    It is pointed out that a comparison of measurements of {tau}{r arrow}{pi}{nu} decays with {pi}{r arrow}{mu}{nu} and {pi}{r arrow}{ital e}{nu} decays can be used to obtain accurate measures of {tau}-{mu} and {tau}-{ital e} universality. From current data on these processes it is found that the ratios of the electroweak charged-current couplings of the {tau} to those of the muon and electron are {ital g}{sub {tau}}/{ital g}{sub {mu}}=0.983{plus minus}0.025 and {ital g}{sub {tau}}/{ital g}{sub {ital e}}=0.986{plus minus}0.026, in agreement with the hypothesis of universality.

  8. Gene Therapy Might Someday Mend Badly Broken Bones

    Science.gov (United States)

    ... page: https://medlineplus.gov/news/fullstory_165664.html Gene Therapy Might Someday Mend Badly Broken Bones Animal ... 2017 (HealthDay News) -- An experimental method that combines gene therapy, stem cells and ultrasound has healed large ...

  9. Characterization and Preparation of Broken Rice Proteins Modified by Proteases

    Directory of Open Access Journals (Sweden)

    Lixia Hou

    2010-01-01

    Full Text Available Broken rice is an underutilized by-product of milling. Proteins prepared from broken rice by treatments with alkaline protease and papain have been characterized with regard to nutritional and functional properties. The protein content and the protein recovery were 56.45 and 75.45 % for alkaline protease treatment, and 65.45 and 46.32 % for papain treatment, respectively. Protease treatment increased the lysine and valine content, leading to a more balanced amino acid profile. Broken rice proteins had high emulsifying capacity, 58.3–71.6 % at neutral pH, and adequate water holding capacity, ranging from 1.96 to 2.93 g/g of proteins. At pH=7.0, the broken rice protein had the highest water holding capacity and the best interfacial activities (emulsifying capacity, emulsifying stability, foaming capacity and foaming stability, which may be the result of the higher solubility at pH=7.0. The interfacial activities increased with the increase in the mass fraction of broken rice proteins. The proteins prepared by the papain treatment had higher water holding capacity (p>0.05, emulsifying capacity (p0.05 than alkaline protease treatment at the same pH or mass fraction. To test the fortification of food products with broken rice proteins, pork sausages containing the proteins were prepared. Higher yield of the sausages was obtained with the increased content of broken rice proteins, in the range of 2.0–9.0 %. The results indicate that broken rice proteins have potential to be used as the protein fortification ingredient for food products.

  10. As Críticas de Amartya Sen à Teoria da Escolha Social de Kenneth Arrow

    OpenAIRE

    Bruno Beltrame; Laura Valladão de Mattos

    2014-01-01

    Resumo: Este artigo visa sistematizar as críticas que Amartya Sen dirige à estrutura teórica adotada por Arrow e mostrar como, para fugir dos resultados devastadores do teorema da impossibilidade, Sen defende a ampliação do universo de informações a serem utilizadas para embasar a escolha social. Inicialmente é apresentado um breve apanhado da teoria da escolha social de Arrow com o objetivo de fornecer o pano de fundo para a compreensão das críticas que Sen dirige a esse sistema teórico. Em ...

  11. Search for the decay K sup + r arrow. pi. sup +. nu. nu

    Energy Technology Data Exchange (ETDEWEB)

    Atiya, M.S.; Chiang, I.; Frank, J.S.; Haggerty, J.S.; Ito, M.M.; Kycia, T.F.; Li, K.K.; Littenberg, L.S.; Stevens, A.; Strand, R.C. (Brookhaven National Laboratory, Upton, New York 11973 (USA)); Louis, W.C. (Medium Energy Physics Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545 (USA)); Akerib, D.S.; Marlow, D.R.; Meyers, P.D.; Selen, M.A.; Shoemaker, F.C.; Smith, A.J.S. (Joseph Henry Laboratories, Princeton University, Princeton, New Jersey 08544 (USA)); Azuelos, G.; Blackmore, E.W.; Bryman, D.A.; Felawka, L.; Kitching, P.; Kuno, Y.; Macdonald, J.A.; Numao, T.; Padley, P.; Poutissou, J.; Poutissou, R.; Roy, J. (TRIUMF, Vancouver, British Columbia, Canada V6T2A3 (CA))

    1990-01-01

    An upper limit on the branching ratio for the decay {ital K}{sup +}{r arrow}{pi}{sup +}{nu}{bar {nu}} is set at 3.4{times}10{sup {minus}8} (90% C.L.). In addition, a 90%-C.L. upper limit of 6.4{times}10{sup {minus}9} is set on the branching ratio for decays of the form {ital K}{sup +}{r arrow}{pi}{sup +}{ital X}{sup 0}, where {ital X}{sup 0} is any massless, weakly interacting neutral particle. Limits are also set for the case where {ital M}{sub {ital X}{sup 0}}{gt}0.

  12. 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}

  13. Relationship between broken appointments and dental students' clinical experience level.

    Science.gov (United States)

    Teich, Sorin T; Wan, Zhuang; Faddoul, Fady F

    2012-09-01

    As more dental schools adopt a comprehensive care model focused on patients' needs rather than a certain number of required procedures, clinic time utilization by students is coming under increasingly close scrutiny. This article presents an analysis of the influence of broken appointment rates on dental students' clinical experience levels. The total percentage of broken appointments experienced by each student from the classes of 2010 and 2011 at Case Western Reserve University School of Dental Medicine during his or her clinical education in the junior and senior years was determined, and the impact of the broken appointment rate on students' clinical experience levels was analyzed. The results show a statistically significant difference regarding the percentage of broken appointments between the classes of 2010 and 2011: 18.64 percent and 14.44 percent, respectively. When the rate of no-shows was compared to the students' clinical experience level, a weak but significant negative correlation was determined for the class of 2010 but not for the class of 2011. It is concluded that the rate of broken appointments accounts for a small part of the variability observed in the number of clinical procedures performed in the predoctoral clinic. When this rate is lowered below a threshold of 14.5 percent, broken appointments seem to have no influence on students' clinical experience level.

  14. 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.

  15. 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...... of Interventional Radiology - The European qualification in Interventional Radiology....

  16. 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.

  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. 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,...

  19. Machine Learning and Radiology

    Science.gov (United States)

    Wang, Shijun; Summers, Ronald M.

    2012-01-01

    In this paper, we give a short introduction to machine learning and survey its applications in radiology. We focused on six categories of applications in radiology: medical image segmentation, registration, computer aided detection and diagnosis, brain function or activity analysis and neurological disease diagnosis from fMR images, content-based image retrieval systems for CT or MRI images, and text analysis of radiology reports using natural language processing (NLP) and natural language understanding (NLU). This survey shows that machine learning plays a key role in many radiology applications. Machine learning identifies complex patterns automatically and helps radiologists make intelligent decisions on radiology data such as conventional radiographs, CT, MRI, and PET images and radiology reports. In many applications, the performance of machine learning-based automatic detection and diagnosis systems has shown to be comparable to that of a well-trained and experienced radiologist. Technology development in machine learning and radiology will benefit from each other in the long run. Key contributions and common characteristics of machine learning techniques in radiology are discussed. We also discuss the problem of translating machine learning applications to the radiology clinical setting, including advantages and potential barriers. PMID:22465077

  20. Mobile computing for radiology.

    Science.gov (United States)

    Auffermann, William F; Chetlen, Alison L; Sharma, Arjun; Colucci, Andrew T; DeQuesada, Ivan M; Grajo, Joseph R; Kung, Justin W; Loehfelm, Thomas W; Sherry, Steven J

    2013-12-01

    The rapid advances in mobile computing technology have the potential to change the way radiology and medicine as a whole are practiced. Several mobile computing advances have not yet found application to the practice of radiology, while others have already been applied to radiology but are not in widespread clinical use. This review addresses several areas where radiology and medicine in general may benefit from adoption of the latest mobile computing technologies and speculates on potential future applications. Copyright © 2013 AUR. Published by Elsevier Inc. All rights reserved.

  1. 78 FR 72720 - Arrow Investment Advisors, LLC, et al.; Notice of Application

    Science.gov (United States)

    2013-12-03

    ... that track the performance of an index provided by an affiliated person to issue shares (``Shares... registered management investment companies and unit investment trusts outside of the same group of investment...'') and Arrow Investments Trust (``Trust''). DATES: Filing Dates: The application was filed on May 21...

  2. A Couple of "Lim (h[right arrow]0)-Is-Missing" Problems

    Science.gov (United States)

    Lau, Ko Hin

    2007-01-01

    Since most students "hate" the concept of limit, in order to make them "happier," this article suggests a couple of naive "lim (h[right arrow]0)-is-missing" problems for them to try for fun. Indeed, differential functional equations that are related to difference quotients in calculus are studied in this paper. In particular, two interesting…

  3. 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…

  4. Poor vigilance affects attentional orienting triggered by central uninformative gaze and arrow cues.

    Science.gov (United States)

    Marotta, Andrea; Martella, Diana; Maccari, Lisa; Sebastiani, Mara; Casagrande, Maria

    2014-11-01

    Behaviour and neuroimaging studies have shown that poor vigilance (PV) due to sleep deprivation (SD) negatively affects exogenously cued selective attention. In the current study, we assessed the impact of PV due to both partial SD and night-time hours on reflexive attentional orienting triggered by central un-informative eye-gaze and arrow cues. Subjective mood and interference performance in emotional Stroop task were also investigated. Twenty healthy participants performed spatial cueing tasks using central directional arrow and eye-gaze as a cue to orient attention. The target was a word written in different coloured inks. The participant's task was to identify the colour of the ink while ignoring the semantic content of the word (with negative or neutral emotional valence). The experiment took place on 2 days. On the first day, each participant performed a 10-min training session of the spatial cueing task. On the second day, half of participants performed the task once at 4:30 p.m. (BSL) and once at 6:30 a.m. (PV), whereas the other half performed the task in the reversed order. Results showed that mean reaction times on the spatial cueing tasks were worsened by PV, although gaze paradigm was more resistant to this effect as compared to the arrow paradigm. Moreover, PV negatively affects attentional orienting triggered by both central un-informative gaze and arrow cues. Finally, prolonged wakefulness affects self-reported mood but does not influence interference control in emotional Stroop task.

  5. Upper limit on the branching ratio for the decay. pi. sup 0 r arrow. nu. nu

    Energy Technology Data Exchange (ETDEWEB)

    Atiya, M.S.; Chiang, I.; Frank, J.S.; Haggerty, J.S.; Ito, M.M.; Kycia, T.F.; Li, K.K.; Littenberg, L.S.; Stevens, A.; Strand, R.C. (Brookhaven National Laboratory, Upton, New York 11973 (IA)); Louis, W.C. (Medium Energy Physics Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545 (USA)); Akerib, D.S.; Marlow, D.R.; Meyers, P.D.; Selen, M.A.; Shoemaker, F.C.; Smith, A.J.S. (Joseph Henry Laboratories, Princeton University, Princeton, New Jersey 08544 (USA)); Azuelos, G.; Blackmore, E.W.; Bryman, D.A.; Felawka, L.; Kitching, P.; Kuno, Y.; Macdonald, J.A.; Numao, T.; Padley, P.; Poutissou, J.; Poutissou, R.; Roy, J. (TRIUMF, Vancouver, British Columbia, (Canada) V6T 2A3)

    1991-04-29

    An experimental upper limit on the branching ratio for the decay {pi}{sup 0}{r arrow}{nu}{bar {nu}} is set at 8.3{times}10{sup {minus}7} (90% C.L.). This decay is forbidden if neutrinos are purely left handed. The limit also applies to any decays of the {pi}{sup 0} to weakly interacting neutrals.

  6. American College of Radiology

    Science.gov (United States)

    American College of Radiology Login About Us Media Center Contact Us Follow us Shopping Cart (0) ACR Catalog Donate My ACR Join ACR ... ACR Catalog Education Center eLearning Exams & Assessments AIRP™ Radiology Leadership Institute ® Quality & Safety Accreditation Appropriateness Criteria ® Practice ...

  7. 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.

  8. 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.

  9. 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.

  10. On behavioral Arrow Pratt risk process with applications to risk pricing, stochastic cash flows, and risk control

    OpenAIRE

    Cadogan, Godfrey

    2009-01-01

    We introduce a closed form behavioural stochastic Arrow-Pratt risk process, decomposed into discrete asymmetric risk seeking and risk averse components that run on different local times in ϵ-disks centered at risk free states. Additionally, we embed Arrow-Pratt (“AP”) risk measure in a simple dynamic system of discounted cash flows with constant volatility, and time varying drift. Signal extraction of Arrow-Pratt risk measure shows that it is highly nonlinear in constant volatility for cash f...

  11. Dynamic and interactive web-based radiology teaching file using layer and javascript

    Energy Technology Data Exchange (ETDEWEB)

    Park, Seong Ho; Han, Joon Koo; Lee, Kyoung Ho [Seoul National Univ. College of Medicine and the Institute of Radiation Medicine, SNUMRC, Seoul (Korea, Republic of)] [and others

    1999-03-01

    To improve the Web-based radiology teaching file by means of a dynamic and interactive interface using Layer and JavaScript. The radiology teaching file for medical students at the author's medical school was used. By mean of a digital camera, films were digitized and compressed to Joint Photographic Expert Group (JPEG) format. Layers which had arrows or lines pointing out lesions and anatomical structures were converted to transparent CompuServe Graphics Interchange Format (GIF). Basically, HyperText Mark-up Language (HTML) was used for each Web page. Using JavaScript, Layers were made to be overlapped with radiologic images at the user's request. Each case page consisted of radiologic images and texts for additional information and explanation. By moving the cursor or clicking onto key words, indicators pointing out corresponding lesions and anatomical structures were automatically shown on radiologic images. Although not compatible with some Web-browsers, a dynamic and interactive interface using Layer and JavaScript has little effect on the time needed for data transfer through a network, and is therefore an effective method of accessing radiologic images using the World-Wide Web and using these for teaching and learning.

  12. Marketing a Radiology Practice.

    Science.gov (United States)

    Levin, David C; Rao, Vijay M; Flanders, Adam E; Sundaram, Baskaran; Colarossi, Margaret

    2016-10-01

    In addition to being a profession, the practice of radiology is a business, and marketing is an important part of that business. There are many facets to marketing a radiology practice. The authors present a number of ideas on how to go about doing this. Some marketing methods can be directed to both patients and referring physicians. Others should be directed just to patients, while still others should be directed just to referring physicians. Aside from marketing, many of them provide value to both target audiences. Copyright © 2016 American College of Radiology. Published by Elsevier Inc. All rights reserved.

  13. Quantum restoration of broken symmetry in one-dimensional loop ...

    Indian Academy of Sciences (India)

    Home; Journals; Pramana – Journal of Physics; Volume 82; Issue 6. Quantum restoration of broken symmetry in onedimensional loop space. Pinaki Patra ... 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 ...

  14. Dynamically broken Anti-de Sitter action for gravity

    OpenAIRE

    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.

  15. Broken CP Symmetry and the Physics Nobel Prize–2008

    Indian Academy of Sciences (India)

    Home; Journals; Resonance – Journal of Science Education; Volume 14; Issue 6. Broken CP Symmetry and the Physics Nobel Prize – 2008. Anjan S Joshipura. General Article Volume 14 Issue 6 June 2009 pp 596-609. Fulltext. Click here to view fulltext PDF. Permanent link:

  16. Fix Broken and Redirected Links Using Group Dashboard Link Report

    Science.gov (United States)

    Learn how to use the tools provided by Drupal in the Group Dashboard to find and correct links on your site that are broken (404 and 403 error codes), or that redirect (301 and 302), for example to a homepage rather than the originally intended content.

  17. Enticing arsonists with broken windows and social disorder

    Science.gov (United States)

    Douglas S. Thomas; David T. Butry; Jeffrey P. Prestemon

    2011-01-01

    In criminology, it is well understood that indicators of urban decay, such as abandoned buildings littered with broken windows, provide criminals with signals identifying neighborhoods with lower crime detection and apprehension rates than better maintained neighborhoods. Whether it is the resident population’s sense of apathy, lack of civic pride, or fear of...

  18. Children and Broken Homes: Sources for the Teacher.

    Science.gov (United States)

    Bentley, Eloise

    The depreciating attitude toward family life in our society has intensified in the past few years. It is not unusual to find substantial numbers of children in a first grade classroom who live in broken homes. Divorce is the answer for more young couples than ever before, and as a result the children involved must face growing up with a parent…

  19. INFLUENCE OF BROKEN ROTOR BARS LOCATION IN THE ...

    African Journals Online (AJOL)

    2013-06-30

    Jun 30, 2013 ... Key words: Induction motor, time stepping finite elements (TSFE) method, broken bars. 1. INTRODUCTION ... In works, where the machine inductances are calculated and the machine performance is ... several assumptions and approximations of the actual machine layout are made, like the effects of stator ...

  20. Cancellation of global anomalies in spontaneously broken gauge ...

    Indian Academy of Sciences (India)

    the Higgs phase of a gauge theory [6]. The would-be Goldstone bosons—the angular components of the Higgs field—are the scalar fields that can be used to write the WZ term. This idea had already been put forward in [7] where the interplay between renormalizability and anomaly cancellation in spontaneously broken ...

  1. A broken fenestrated tracheostomy tube fragment removed from the ...

    African Journals Online (AJOL)

    Open Access article distributed under the terms of the. Creative Commons License [CC BY-NC 3.0] http://creativecommons.org/licenses/by-nc/3.0. A broken fenestrated tracheostomy tube fragment .... 2007;2:58–60. 6. Kantar B, Uzumcugil F, Ankay Yilbas A, et al. Emergency management of aspirated tracheostomy cannula.

  2. A method for removal of broken vertebral screws.

    Science.gov (United States)

    McGuire, R A

    1992-06-01

    A method for removal of a broken vertebral screw is described using an easily obtained 5/64-inch tungsten drill bit and a #1 screw extractor. It allows removal of the screw while retaining pedicle integrity and also minimizes potential nerve root compromise.

  3. The anthropic arrow of time and realistic world models: On Price and atemporal universe

    Directory of Open Access Journals (Sweden)

    Ćirković M.M.

    2001-01-01

    Full Text Available In recent attempts at building an atemporal ('tenseless' picture of the physical world, insufficient attention is devoted to processes giving rise to the cosmological arrow of time. Having regard to the new empirical findings and particularly to the epochal discovery of large effective vacuum energy density, the existing discussions of the topic need to be reassessed. In particular, the necessity of a new treatment of asymmetric temporal boundary conditions in an open universe is hereby put forward. Some errors and uncertainties implicit in the recent treatment of the problem of the cosmological arrow of time in the brilliant recent monograph of Prof. Price are briefly discussed. In addition, we discuss relevancy of the high level of complexity observable in living and intelligent beings in the universe for the question of time-reversal symmetry.

  4. Review of Cranked-Arrow Wing Aerodynamics Project: Its International Aeronautical Community Role

    Science.gov (United States)

    Lamar, John E.; Obara, Clifford J.

    2007-01-01

    This paper provides a brief history of the F-16XL-1 aircraft, its role in the High Speed Research (HSR) program and how it was morphed into the Cranked Arrow Wing Aerodynamics Project (CAWAP). Various flight, wind-tunnel and Computational Fluid Dynamics (CFD) data sets were generated during the CAWAP. These unique and open flight datasets for surface pressures, boundary-layer profiles and skinfriction distributions, along with surface flow data, are described and sample data comparisons given. This is followed by a description of how the project became internationalized to be known as Cranked Arrow Wing Aerodynamics Project International (CAWAPI) and is concluded by an introduction to the results of a 4 year CFD predictive study of data collected at flight conditions by participating researchers.

  5. 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...

  6. Radiology Architecture Project Primer.

    Science.gov (United States)

    Sze, Raymond W; Hogan, Laurie; Teshima, Satoshi; Davidson, Scott

    2017-12-19

    The rapid pace of technologic advancement and increasing expectations for patient- and family-friendly environments make it common for radiology leaders to be involved in imaging remodel and construction projects. Most radiologists and business directors lack formal training in architectural and construction processes but are expected to play significant and often leading roles in all phases of an imaging construction project. Avoidable mistakes can result in significant increased costs and scheduling delays; knowledgeable participation and communication can result in a final product that enhances staff workflow and morale and improves patient care and experience. This article presents practical guidelines for preparing for and leading a new imaging architectural and construction project. We share principles derived from the radiology and nonradiology literature and our own experience over the past decade completely remodeling a large pediatric radiology department and building a full-service outpatient imaging center. Copyright © 2017 American College of Radiology. Published by Elsevier Inc. All rights reserved.

  7. Successful Transformational Radiology Leaders.

    Science.gov (United States)

    Douget, Karen

    2015-01-01

    Transformational radiology leaders elevate subordinates, expand self-awareness, develop lasting relationships, strive to exceed expectations, and uphold the vision and goals of the organization. In order for radiology leaders to become more transformational in their leadership style there are four fundamental elements they must learn: idealized influence, individualized consideration, inspirational motivation, and intellectual stimulation. Leaders can utilize personality and self-assessments to learn more about themselves, identify areas of strengths and weaknesses, and learn to be more effective when leading employees.

  8. [Medical docimology in radiology].

    Science.gov (United States)

    Magnani, F; Greco, M

    1985-11-01

    The authors report the experience of computerized integrated didactics on trial at the Institute of Radiology of the University of Catania. Students majoring in Medicine undergo a propaedeutic written test, consisting in a number of multiple choice questions, before proceeding to the oral examination in radiology. The procedures preceding the test and those following it are accomplished with the aid of a computer. The authors discuss the docimological motivations, the specifications of the system and the results obtained after a trial period.

  9. 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.

  10. 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.

  11. 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.

  12. 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. .

  13. Fluorescence microscopy with diffraction resolution barrier broken by stimulated emission

    OpenAIRE

    Klar, Thomas A.; Jakobs, Stefan; Dyba, Marcus; Egner, Alexander; Hell, Stefan W.

    2000-01-01

    The diffraction barrier responsible for a finite focal spot size and limited resolution in far-field fluorescence microscopy has been fundamentally broken. This is accomplished by quenching excited organic molecules at the rim of the focal spot through stimulated emission. Along the optic axis, the spot size was reduced by up to 6 times beyond the diffraction barrier. The simultaneous 2-fold improvement in the radial direction rendered a nearly spherical fluorescence spot with a diameter of 9...

  14. 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.

  15. Mental Suffering in Protracted Political Conflict: Feeling Broken or Destroyed.

    Directory of Open Access Journals (Sweden)

    Brian K Barber

    Full Text Available This mixed-methods exploratory study identified and then developed and validated a quantitative measure of a new construct of mental suffering in the occupied Palestinian territory: feeling broken or destroyed.Group interviews were conducted in 2011 with 68 Palestinians, most aged 30-40, in the West Bank, East Jerusalem, and the Gaza Strip to discern local definitions of functioning. Interview participants articulated of a type of suffering not captured in existing mental health instruments used in regions of political conflict. In contrast to the specific difficulties measured by depression and PTSD (sleep, appetite, energy, flashbacks, avoidance, etc., participants elaborated a more existential form of mental suffering: feeling that one's spirit, morale and/or future was broken or destroyed, and emotional and psychological exhaustion. Participants articulated these feelings when describing the rigors of the political and economic contexts in which they live. We wrote survey items to capture these sentiments and administered these items-along with standard survey measures of mental health-to a representative sample of 1,778 32-43 year olds in the occupied Palestinian territory. The same survey questions also were administered to a representative subsample (n = 508 six months earlier, providing repeated measures of the construct.Across samples and time, the feeling broken or destroyed scale: 1 comprised a separate factor in exploratory factor analyses, 2 had high inter-item consistency, 3 was reported by both genders and in all regions, 4 showed discriminate validity via moderate correlations with measures of feelings of depression and trauma-related stress, and 5 was more commonly experienced than either feelings of depression or trauma-related stress.Feeling broken or destroyed can be reliably measured and distinguished from conventional measures of mental health. Such locally grounded and contextualized measures should be identified and

  16. Restoration of badly broken, endodontically treated posterior teeth

    OpenAIRE

    Gogna, Rupika; Jagadish, S; Shashikala, K; Keshava Prasad, BS

    2009-01-01

    It is generally agreed that the successful treatment of a badly broken tooth with pulpal disease depends not only on good endodontic therapy, but also on good prosthetic reconstruction of the tooth after the endodontic therapy is complete. Often, we come across an endodontically treated tooth with little or no clinical crown in routine clinical cases. In such cases, additional retention and support of the restoration are difficult to achieve. Two case reports are discussed here where structur...

  17. The star shaped pattern on broken thin sheets

    Science.gov (United States)

    Vandenberghe, Nicolas; Vermorel, Romain; Villermaux, Emmanuel

    2011-03-01

    We study transverse impacts of rigid objects on a thin elastic sheet made of acrylic. After impact, a transverse wave propagates on the sheet and orthoradial stresses lead to the formation of radial cracks. The result of this fragmentation process is the star shaped pattern frequently observed on broken windows. We investigate the variation of the pattern and in particular the number of radial cracks with impact speed and material properties. The formation of rayed craters by meteorite impacts will be briefly discussed.

  18. Mental Suffering in Protracted Political Conflict: Feeling Broken or Destroyed.

    Science.gov (United States)

    Barber, Brian K; McNeely, Clea A; El Sarraj, Eyad; Daher, Mahmoud; Giacaman, Rita; Arafat, Cairo; Barnes, William; Abu Mallouh, Mohammed

    2016-01-01

    This mixed-methods exploratory study identified and then developed and validated a quantitative measure of a new construct of mental suffering in the occupied Palestinian territory: feeling broken or destroyed. Group interviews were conducted in 2011 with 68 Palestinians, most aged 30-40, in the West Bank, East Jerusalem, and the Gaza Strip to discern local definitions of functioning. Interview participants articulated of a type of suffering not captured in existing mental health instruments used in regions of political conflict. In contrast to the specific difficulties measured by depression and PTSD (sleep, appetite, energy, flashbacks, avoidance, etc.), participants elaborated a more existential form of mental suffering: feeling that one's spirit, morale and/or future was broken or destroyed, and emotional and psychological exhaustion. Participants articulated these feelings when describing the rigors of the political and economic contexts in which they live. We wrote survey items to capture these sentiments and administered these items-along with standard survey measures of mental health-to a representative sample of 1,778 32-43 year olds in the occupied Palestinian territory. The same survey questions also were administered to a representative subsample (n = 508) six months earlier, providing repeated measures of the construct. Across samples and time, the feeling broken or destroyed scale: 1) comprised a separate factor in exploratory factor analyses, 2) had high inter-item consistency, 3) was reported by both genders and in all regions, 4) showed discriminate validity via moderate correlations with measures of feelings of depression and trauma-related stress, and 5) was more commonly experienced than either feelings of depression or trauma-related stress. Feeling broken or destroyed can be reliably measured and distinguished from conventional measures of mental health. Such locally grounded and contextualized measures should be identified and included in

  19. Spontaneously broken Yang-Mills-Einstein supergravities as double copies

    Science.gov (United States)

    Chiodaroli, Marco; Günaydin, Murat; Johansson, Henrik; Roiban, Radu

    2017-06-01

    Color/kinematics duality and the double-copy construction have proved to be systematic tools for gaining new insight into gravitational theories. Extending our earlier work, in this paper we introduce new double-copy constructions for large classes of spontaneously-broken Yang-Mills-Einstein theories with adjoint Higgs fields. One gauge-theory copy entering the construction is a spontaneously-broken (super-)Yang-Mills theory, while the other copy is a bosonic Yang-Mills-scalar theory with trilinear scalar interactions that display an explicitly-broken global symmetry. We show that the kinematic numerators of these gauge theories can be made to obey color/kinematics duality by exhibiting particular additional Lie-algebraic relations. We discuss in detail explicit examples with N=2 supersymmetry, focusing on Yang-Mills-Einstein supergravity theories belonging to the generic Jordan family in four and five dimensions, and identify the map between the supergravity and double-copy fields and parameters. We also briefly discuss the application of our results to N=4 supergravity theories. The constructions are illustrated by explicit examples of tree-level and one-loop scattering amplitudes.

  20. Broken instrument retrieval with indirect ultrasonics in a primary molar.

    Science.gov (United States)

    Pk, Musale; Sc, Kataria; As, Soni

    2016-02-01

    The separation of a file during pulpectomy is a rare incident in primary teeth due to inherently wider and relatively straighter root canals. A broken instrument hinders the clinician from optimal preparation and obturation of the root canal system invariably leading to failure, although in such teeth, an extraction followed by suitable space maintenance is considered as the treatment of choice. This case report demonstrates successful nonsurgical retrieval of a separated H file fragment in 84. A 7-year-old girl was referred to the Department of Paedodontics and Preventive Dentistry for endodontic management of a primary tooth 84 with a dento-alveolar abscess. Her medical history was noncontributory. After diagnosing a broken H file in the mesio-lingual canal, the tooth was endodontically treated in two appointments. At the first session, a broken file was successfully retrieved after using low intensity ultrasonic vibrations through a DG 16 endodontic explorer viewed under an operating microscope. After abscess resolution, Vitapex root canal obturation with a preformed metal crown cementation was completed at a second session. The patient was recalled at 3, 6, 12 and 15 month interval and reported to be clinically asymptomatic and radiographically with complete furcal healing. Integration of microscopes and ultrasonics in paediatric dental practice has made it possible to save such teeth with a successful outcome. Favourable location of the separated file, relatively straighter root canal system and patient cooperation resulted in successful nonsurgical management in this case.

  1. RADIOLOGY INFORMATION SYSTEM

    Directory of Open Access Journals (Sweden)

    Rade R. Babić

    2012-01-01

    Full Text Available The development of information systems in health care is approaching the process of integration of various systems used in a single computer so that we witness today the omnipresent idea of merging the functions of the clinical-hospital (CHIS and radiology (RIS information system. Radiological Information System (RIS is a technology solution to complete computerization and modernization of the work of the radiology center, and transition from film to paper and ful electronic management and digital recordings. RIS creates the digital radiology center where information is always available at the right place and at the right time. Within the realisation of RIS, it is necessary to follow the standards and systems relating to the specific RIS, which are: DICOM (Digital Imaging and Communications in Medicine, PACS (Picture Archiving and Communication System, HL7 (Health Level Seven. The relevant links of modern RIS are teleradiology and mobile radiology. The authors conclude that the introduction of RIS, HIS and other information systems are reflected in the automation, reduction of possible errors, increase in diagnostic and therapeutic quality, lower costs for materials, the increase in efficiency, saving time and others.

  2. Managing Pain from a Broken Hip: A Guide for Adults and Their Caregivers

    Science.gov (United States)

    ... Home Managing Pain From a Broken Hip Managing Pain From a Broken Hip A Guide for Adults and Their Caregivers Consumer Summary May 17, 2011 Download PDF 931.5 KB Related Files Download Audio file [ ...

  3. Is the pull-out force of the Meniscus Arrow in bone affected by the inward curling of the barbs during biodegradation? An in vitro study

    OpenAIRE

    Wouters, Diederick B.; Burgerhof, Johannes G. M.; Hosson, Jeff T.M. De; Bos, Rudolf R. M.

    2009-01-01

    Background: Inward curling of the barbs of Meniscus Arrows during degradation was observed in a previous study, in which swelling, distention, and water uptake by Meniscus Arrows was evaluated. This change of configuration could have consequences with respect to anchorage capacity in bone. Material/Methods: Eight non-degraded Meniscus Arrows in the original configuration were pulled out of thawed, fresh-frozen human femoral condyle, and pull-out force was measured and compared with that of 6 ...

  4. 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.

  5. 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.

  6. 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.

  7. 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

  8. 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.

  9. Educational treasures in Radiology: Radiolopolis - an international Radiology community.

    Science.gov (United States)

    Talanow, Roland; Giesel, Frederik

    2009-01-01

    THIS ARTICLE FOCUSES ON A RELATIVELY NEW CONCEPT IN THE INTERNET: "Social networking" and especially on one program that successfully found a unique way to provide a social network for Radiology: Radiolopolis. Radiolopolis (www.Radiolopolis.com) is an international Radiology network to promote education, research and clinical practice in Radiology. What makes this Radiology community unique and special is that the founders of Radiolopolis implemented multiple educational and clinical/practical programs which have been developed over the past years.

  10. In Situ Regeneration of Si-based ARROW-B Surface Plasmon Resonance Biosensors.

    Science.gov (United States)

    Hsu, Hsin-Feng; Lin, Yen-Ting; Huang, Yang-Tung; Lu, Ming-Feng; Chen, Chyong-Hua

    Si-based antiresonant reflecting optical waveguide type B (ARROW-B) surface plasmon resonance (SPR) biosensors allow label-free high-sensitivity detection of biomolecular interactions in real time. The ARROW-B waveguide, which has a thick guiding layer, provides efficient coupling with a single-mode fiber. The Si-based ARROW-B SPR biosensors were fabricated by using the standard semiconductor fabrication processes with a single-step lithography. A fluid flow system was designed to transport samples or analytes. The waveguide consists of propagation and SPR sensing regions. The propagation regions in the front and rear of the SPR sensing region have a symmetric cladding structure to isolate them from environmental changes. A high-index O-ring is used to seal the liquid flow channel. The intensity interrogation method was used to characterize the sensors. The sensitivity of the biosensors was 3.0 × 10(3) µW/RIU (refractive index unit) with a resolution of 6.2 × 10(-5) RIU. An in situ regeneration process was designed to make the sensors reusable and eliminate re-alignment of the optical measurement system. The regeneration was realized using ammonia-hydrogen peroxide mixture solutions to remove molecules bound on the sensor surface, such as self-assembled 11-mercapto-1undecanoic acid and bovine serum albumin. SPR was used to monitor the regeneration processes. The experimental results show that the sensing response did not significantly change after the sensor was reused more than 10 times. In situ regenerations of the sensors were achieved.

  11. Laboratory Measurements of Fe xxiv Line Emission: 3[r arrow]2 Transitions near Excitation Threshold

    Energy Technology Data Exchange (ETDEWEB)

    Gu, M.F.; Kahn, S.M.; Savin, D.W. (Department of Physics and Columbia Astrophysics Laboratory, Columbia University, New York, NY 10027 (United States)); Beiersdorfer, P.; Brown, G.V.; Liedahl, D.A.; Reed, K.J. (Department of Physics and Space Technology, Lawrence Livermore National Laboratory, Livermore CA 94550 (United States)); Bhalla, C.P.; Grabbe, S.R. (Department of Physics, Kansas State University, Manhattan, KS 66506 (United States))

    1999-06-01

    Using the Electron Beam Ion Trap facility at Lawrence Livermore National Laboratory, we have measured relative cross sections for Fe xxiv line emission at electron energies between 0.7 and 3.0 keV. The measurements include line formation by direct electron impact excitation (DE), radiative cascades, resonant excitation (RE), and dielectronic recombination (DR) satellites with captured electrons in n[ge]5 levels. Good agreement with [ital R]-matrix and distorted wave calculations is found. In collisionally ionized plasmas, at temperatures near where the ion abundance peaks (kT[sub e] [approximately]1.7 keV), the RE contributions arefound to be [approx lt]5[percent] of the line emission, while the DR satellites contribute [approx lt]10[percent]. While good agreement with state-of-the-art atomic physics calculations is found, there is less good agreement with existingspectral synthesis codes in common astrophysical use. For the Fe xxiv 3p[sub 3/2] [r arrow]2s[sub 1/2], 3p[sub 1/2] [r arrow]2s[sub 1/2], and 3d[sub 5/2] [r arrow]2p[sub 3/2] transitions, the synthesis code MEKAL underestimates the emissivity in coronal equilibrium by [approximately]20[percent] at temperatures near where the ion abundance peaks. In situations where the ionization balance is not solely determined by the electron temperature, RE and DR satellites may contribute a considerable fraction of the line emission. [copyright] [ital [copyright] 1999.] [ital The American Astronomical Society

  12. Radiological controls integrated into design

    Energy Technology Data Exchange (ETDEWEB)

    Kindred, G.W. [Cleveland Electric Illuminating Co., Perry, OH (United States)

    1995-03-01

    Radiological controls are required by law in the design of commercial nuclear power reactor facilities. These controls can be relatively minor or significant, relative to cost. To ensure that radiological controls are designed into a project, the health physicist (radiological engineer) must be involved from the beginning. This is especially true regarding keeping costs down. For every radiological engineer at a nuclear power plant there must be fifty engineers of other disciplines. The radiological engineer cannot be an expert on every discipline of engineering. However, he must be knowledgeable to the degree of how a design will impact the facility from a radiological perspective. This paper will address how to effectively perform radiological analyses with the goal of radiological controls integrated into the design package.

  13. 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.

  14. 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.

  15. Radiology of back pain

    Energy Technology Data Exchange (ETDEWEB)

    Wackenheim, A.; Dietemann, J.L.

    1983-04-01

    The authors give an overview of causes of back pain which may be detected by radiological examinations. They insist on practical points of view such as: main cause, accessory cause, problems arising by multiple causes, congenital malformation of the vertebral arch such as anisocoria, canalar stenosis, cheirolumbar dysostosis. They describe two new signs: the pedicular scalloping and the framed articular process.

  16. [Emergency Radiology layout].

    Science.gov (United States)

    Casciani, E; Bertini, L; Lanciotti, S; Campagnano, S; Valentini, C; De Cicco, M L; Polettini, E; Gualdi, G F

    2009-01-01

    The purpose of Radiologic Unit in Emergency is to reach diagnostic and therapeutic effectiveness in the best way and in less time possible. The Portable Ultrasound Device is an instrument necessary in Emergency Room and in ambulance/helicopter to evaluate the evidence of endoperitoneal bleeding. The CT is the radiologic methodic more fast that permits a complete evaluation of all body segments in traumatized patient in the famous "golden hour" after the trauma, therefore it would be placed in Emergency Area. The multislice CT brought to a reduction of morbidity and mortality, thanks to a quick acquisition, to a thin collimation, to a more spatial resolution and to an optimal vessel opacization, determining a saving of hospital global costs, therefore a reduction of percentage of not necessaries operations and permitting a more rapid diagnosis, obtaining a considerable reduction of waiting in Trauma Emergency Room with more rapid and aimed therapies and a consequent costs reduction. To satisfy a so wide question of radiologic exams necessaries devices are informatic systems completely connected between Radiology department and other departments. Main advantages of MR in Emergency are the use of non ionising radiations, the possibility to effect diffusion and perfusion studies and to evaluate spinal cord damage. Reduction of time of patient preparation and times of acquisition and elaboration of imagines by modern and performant devices is basic to make more rapid therapeutic decisions.

  17. Radiology of spinal curvature

    Energy Technology Data Exchange (ETDEWEB)

    De Smet, A.A.

    1985-01-01

    This book offers the only comprehensive, concise summary of both the clinical and radiologic features of thoracic and lumbar spine deformity. Emphasis is placed on idiopathic scoliosis, which represents 85% of all patients with scoliosis, but less common areas of secondary scoliosis, kyphosis and lordosis are also covered.

  18. Dosimetry in diagnostic radiology.

    Science.gov (United States)

    Meghzifene, Ahmed; Dance, David R; McLean, Donald; Kramer, Hans-Michael

    2010-10-01

    Dosimetry is an area of increasing importance in diagnostic radiology. There is a realisation amongst health professionals that the radiation dose received by patients from modern X-ray examinations and procedures can be at a level of significance for the induction of cancer across a population, and in some unfortunate instances, in the acute damage to particular body organs such as skin and eyes. The formulation and measurement procedures for diagnostic radiology dosimetry have recently been standardised through an international code of practice which describes the methodologies necessary to address the diverging imaging modalities used in diagnostic radiology. Common to all dosimetry methodologies is the measurement of the air kerma from the X-ray device under defined conditions. To ensure the accuracy of the dosimetric determination, such measurements need to be made with appropriate instrumentation that has a calibration that is traceable to a standards laboratory. Dosimetric methods are used in radiology departments for a variety of purposes including the determination of patient dose levels to allow examinations to be optimized and to assist in decisions on the justification of examination choices. Patient dosimetry is important for special cases such as for X-ray examinations of children and pregnant patients. It is also a key component of the quality control of X-ray equipment and procedures. Copyright © 2010. Published by Elsevier Ireland Ltd.

  19. 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.

  20. Accuracy of Manufacturing the Scythian Arrow and Its Influence on the Arrow’s Ballistic Parameters

    Directory of Open Access Journals (Sweden)

    Aleksey V. Korobeinikov

    2014-03-01

    Full Text Available Analysis of Scythian arrowheads discovered in the area near the Severniy Donets River showed that they might belong to one batch, that is, they may probably have come from the same quiver. As archeologists date the findings back to the period of VII-IV centuries B.C., for this entire period, the Scythian bow did not have any substantial changes in its design. Due to the fact that the analysis involved both combat-purpose and hunting arrows, we have sufficient grounds to believe that the Scythians might have had a versatile bow to help them perform all kinds of combat and everyday tasks.

  1. Preventing mercury vapor release from broken fluorescent lamps during shipping.

    Science.gov (United States)

    Glenz, Tracy T; Brosseau, Lisa M; Hoffbeck, Richard W

    2009-03-01

    Fluorescent lamps are estimated to annually release 1 t of mercury into the air in the United States; transport of used lamps may play an important role in these emissions. In 1999, the U.S. Environmental Protection Agency added lamps to the universal waste rule to encourage recycling by allowing shipment to recycling facilities by common carrier. The rules required that lamp packaging must be structurally sound and adequate to prevent breakage but did not address vapor release. In 2005, a requirement was added that packaging must be designed to prevent the escape of mercury into the environment, but this change does not apply to fluorescent lamps. The goal of this research was to compare mercury vapor containment among different packaging configurations. In 10 replicate experiments of 5 different packages containing 40 broken, used, low-mercury lamps, two 6-hr samples of airborne mercury vapor concentrations were taken in a well-mixed sealed chamber held at 83 +/- 2 degrees F. Average chamber concentrations ranged from 0.977 mg/m3 for a single cardboard box to 0.004 mg/m3 for a double cardboard box with a plastic-foil laminate bag sandwiched between the boxes. In comparison to the single cardboard box, a single box with an unsealed thin plastic liner lowered mercury concentrations in the chamber by 52%, single or double boxes with a thicker tape-sealed plastic bag lowered concentrations by 90-92%, and a double box with a ziplock plastic-foil laminate bag lowered concentrations by 99.7%. The latter was the only configuration capable of maintaining airborne concentrations below all occupational exposure levels. Standards more specific to mercury containment are needed for packages used to ship fluorescent lamps to recyclers. Results from this study suggest that an effective packaging design should minimize the effect of cuts from broken glass while also preventing the release of mercury vapor from broken lamps.

  2. Radiological Sciences Department: Annual report

    Energy Technology Data Exchange (ETDEWEB)

    Mickelson, M.L.

    1953-04-23

    This document summarizes the accomplishments of the Radiological Sciences Department for the year 1952. Topics included radiological engineering, radiological standards, personal dosimetry, radiation exposure, research meterology, radiochemical standards, and soil science. Two diagrams reflect changes in the organizational structure of the department. 2 figs., 1 tab. (TEM)

  3. 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)

  4. Einsteinian gravity from a spontaneously broken topological BF theory

    Science.gov (United States)

    Mielke, Eckehard W.

    2010-05-01

    Recently, (anti-)de Sitter gauge theories of gravity have been reconsidered. We generalize this to a metric-free sl(5,R) gauge framework and apply spontaneous symmetry breaking to the corresponding topological BF scheme. Effectively, we end-up with Einstein spaces with a tiny cosmological constant related to the scale of symmetry breaking. An induced 'background' metric emerges from a Higgs-like mechanism. It is indicated how the finiteness of such a deformed topological scheme may convert into asymptotic safeness after quantization of the spontaneously broken model.

  5. Restoration of badly broken, endodontically treated posterior teeth.

    Science.gov (United States)

    Gogna, Rupika; Jagadish, S; Shashikala, K; Keshava Prasad, Bs

    2009-07-01

    It is generally agreed that the successful treatment of a badly broken tooth with pulpal disease depends not only on good endodontic therapy, but also on good prosthetic reconstruction of the tooth after the endodontic therapy is complete. Often, we come across an endodontically treated tooth with little or no clinical crown in routine clinical cases. In such cases, additional retention and support of the restoration are difficult to achieve. Two case reports are discussed here where structurally compromised, endodontically treated, posterior teeth were restored using the Richmond crown in the first case, and by the use of two nonparallel cast posts in the second case.

  6. 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.

  7. A model to determine payments associated with radiology procedures.

    Science.gov (United States)

    Mabotuwana, Thusitha; Hall, Christopher S; Thomas, Shiby; Wald, Christoph

    2017-12-01

    Across the United States, there is a growing number of patients in Accountable Care Organizations and under risk contracts with commercial insurance. This is due to proliferation of new value-based payment models and care delivery reform efforts. In this context, the business model of radiology within a hospital or health system context is shifting from a primary profit-center to a cost-center with a goal of cost savings. Radiology departments need to increasingly understand how the transactional nature of the business relates to financial rewards. The main challenge with current reporting systems is that the information is presented only at an aggregated level, and often not broken down further, for instance, by type of exam. As such, the primary objective of this research is to provide better visibility into payments associated with individual radiology procedures in order to better calibrate expense/capital structure of the imaging enterprise to the actual revenue or value-add to the organization it belongs to. We propose a methodology that can be used to determine technical payments at a procedure level. We use a proportion based model to allocate payments to individual radiology procedures based on total charges (which also includes non-radiology related charges). Using a production dataset containing 424,250 radiology exams we calculated the overall average technical charge for Radiology to be $873.08 per procedure and the corresponding average payment to be $326.43 (range: $48.27 for XR and $2750.11 for PET/CT) resulting in an average payment percentage of 37.39% across all exams. We describe how charges associated with a procedure can be used to approximate technical payments at a more granular level with a focus on Radiology. The methodology is generalizable to approximate payment for other services as well. Understanding payments associated with each procedure can be useful during strategic practice planning. Charge-to-total charge ratio can be used to

  8. The Pitch Imagery Arrow Task: effects of musical training, vividness, and mental control.

    Science.gov (United States)

    Gelding, Rebecca W; Thompson, William Forde; Johnson, Blake W

    2015-01-01

    Musical imagery is a relatively unexplored area, partly because of deficiencies in existing experimental paradigms, which are often difficult, unreliable, or do not provide objective measures of performance. Here we describe a novel protocol, the Pitch Imagery Arrow Task (PIAT), which induces and trains pitch imagery in both musicians and non-musicians. Given a tonal context and an initial pitch sequence, arrows are displayed to elicit a scale-step sequence of imagined pitches, and participants indicate whether the final imagined tone matches an audible probe. It is a staircase design that accommodates individual differences in musical experience and imagery ability. This new protocol was used to investigate the roles that musical expertise, self-reported auditory vividness and mental control play in imagery performance. Performance on the task was significantly better for participants who employed a musical imagery strategy compared to participants who used an alternative cognitive strategy and positively correlated with scores on the Control subscale from the Bucknell Auditory Imagery Scale (BAIS). Multiple regression analysis revealed that Imagery performance accuracy was best predicted by a combination of strategy use and scores on the Vividness subscale of BAIS. These results confirm that competent performance on the PIAT requires active musical imagery and is very difficult to achieve using alternative cognitive strategies. Auditory vividness and mental control were more important than musical experience in the ability to perform manipulation of pitch imagery.

  9. The Pitch Imagery Arrow Task: effects of musical training, vividness, and mental control.

    Directory of Open Access Journals (Sweden)

    Rebecca W Gelding

    Full Text Available Musical imagery is a relatively unexplored area, partly because of deficiencies in existing experimental paradigms, which are often difficult, unreliable, or do not provide objective measures of performance. Here we describe a novel protocol, the Pitch Imagery Arrow Task (PIAT, which induces and trains pitch imagery in both musicians and non-musicians. Given a tonal context and an initial pitch sequence, arrows are displayed to elicit a scale-step sequence of imagined pitches, and participants indicate whether the final imagined tone matches an audible probe. It is a staircase design that accommodates individual differences in musical experience and imagery ability. This new protocol was used to investigate the roles that musical expertise, self-reported auditory vividness and mental control play in imagery performance. Performance on the task was significantly better for participants who employed a musical imagery strategy compared to participants who used an alternative cognitive strategy and positively correlated with scores on the Control subscale from the Bucknell Auditory Imagery Scale (BAIS. Multiple regression analysis revealed that Imagery performance accuracy was best predicted by a combination of strategy use and scores on the Vividness subscale of BAIS. These results confirm that competent performance on the PIAT requires active musical imagery and is very difficult to achieve using alternative cognitive strategies. Auditory vividness and mental control were more important than musical experience in the ability to perform manipulation of pitch imagery.

  10. 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.

  11. Broken Ergodicity in MHD Turbulence in a Spherical Domain

    Science.gov (United States)

    Shebalin, John V.; wang, Yifan

    2011-01-01

    Broken ergodicity (BE) occurs in Fourier method numerical simulations of ideal, homogeneous, incompressible magnetohydrodynamic (MHD) turbulence. Although naive statistical theory predicts that Fourier coefficients of fluid velocity and magnetic field are zero-mean random variables, numerical simulations clearly show that low-wave-number coefficients have non-zero mean values that can be very large compared to the associated standard deviation. In other words, large-scale coherent structure (i.e., broken ergodicity) in homogeneous MHD turbulence can spontaneously grow out of random initial conditions. Eigenanalysis of the modal covariance matrices in the probability density functions of ideal statistical theory leads to a theoretical explanation of observed BE in homogeneous MHD turbulence. Since dissipation is minimal at the largest scales, BE is also relevant for resistive magnetofluids, as evidenced in numerical simulations. Here, we move beyond model magnetofluids confined by periodic boxes to examine BE in rotating magnetofluids in spherical domains using spherical harmonic expansions along with suitable boundary conditions. We present theoretical results for 3-D and 2-D spherical models and also present computational results from dynamical simulations of 2-D MHD turbulence on a rotating spherical surface. MHD turbulence on a 2-D sphere is affected by Coriolus forces, while MHD turbulence on a 2-D plane is not, so that 2-D spherical models are a useful (and simpler) intermediate stage on the path to understanding the much more complex 3-D spherical case.

  12. Gauge Invariance and Broken Symmetries in Anyon Superfluids

    Science.gov (United States)

    Boyanovsky, Daniel

    We review aspects of broken symmetry and the nature of long range order in theories of anyons starting with bosons with a statistical interaction. We introduce a novel gauge invariant quantization scheme that allows the identification of local and gauge invariant order parameters. The connection between spin and statistics is reviewed and the consequences of broken symmetries in the anyon representation are discussed. An anyon gas is studied in the Bogoliubov approximation, it is determined that the ground state is a condensate of charge-flux composites with “quasi-long-range order” at zero temperature, a “weak” gap in the spectrum and finite helicity modulus. The system is disordered at nonzero temperatures. The disorder is not caused by Goldstone bosons but by the strong infrared behavior arising from the Coulomb interaction induced by the long-range statistical interaction. The properties of topological vortices in nonrelativistic and in relativistic Landau-Ginzburg theories are studied in detail. We study the physics of the mean-field ansatz and quasi-long range order in a simple exactly soluble relativistic model. This model exhibits a novel phenomenon of charge redistribution to the boundaries and restoration of translational invariance in the infinite volume limit. It also illuminates the physics of quasi-long-range order with a gap in the spectrum, statistical charge polarization by external magnetic fields and the role of “large” gauge transformations.

  13. Standard model with spontaneously broken quantum scale invariance

    Science.gov (United States)

    Ghilencea, D. M.; Lalak, Z.; Olszewski, P.

    2017-09-01

    We explore the possibility that scale symmetry is a quantum symmetry that is broken only spontaneously and apply this idea to the standard model. We compute the quantum corrections to the potential of the Higgs field (ϕ ) in the classically scale-invariant version of the standard model (mϕ=0 at tree level) extended by the dilaton (σ ). The tree-level potential of ϕ and σ , dictated by scale invariance, may contain nonpolynomial effective operators, e.g., ϕ6/σ2, ϕ8/σ4, ϕ10/σ6, etc. The one-loop scalar potential is scale invariant, since the loop calculations manifestly preserve the scale symmetry, with the dimensional regularization subtraction scale μ generated spontaneously by the dilaton vacuum expectation value μ ˜⟨σ ⟩. The Callan-Symanzik equation of the potential is verified in the presence of the gauge, Yukawa, and the nonpolynomial operators. The couplings of the nonpolynomial operators have nonzero beta functions that we can actually compute from the quantum potential. At the quantum level, the Higgs mass is protected by spontaneously broken scale symmetry, even though the theory is nonrenormalizable. We compare the one-loop potential to its counterpart computed in the "traditional" dimensional regularization scheme that breaks scale symmetry explicitly (μ =constant) in the presence at the tree level of the nonpolynomial operators.

  14. 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.

  15. 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,…

  16. Is the pull-out force of the Meniscus Arrow in bone affected by the inward curling of the barbs during biodegradation? An in vitro study

    NARCIS (Netherlands)

    Wouters, Diederick B.; Burgerhof, Johannes G. M.; de Hosson, Jeff T. M.; Bos, Rudolf R. M.

    Background: Inward curling of the barbs of Meniscus Arrows during degradation was observed in a previous study, in which swelling, distention, and water uptake by Meniscus Arrows was evaluated. This change of configuration could have consequences with respect to anchorage capacity in bone.

  17. 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.

  18. Radiology and Ethics Education.

    Science.gov (United States)

    Camargo, Aline; Liu, Li; Yousem, David M

    2017-09-01

    The purpose of this study is to assess medical ethics knowledge among trainees and practicing radiologists through an online survey that included questions about the American College of Radiology Code of Ethics and the American Medical Association Code of Medical Ethics. Most survey respondents reported that they had never read the American Medical Association Code of Medical Ethics or the American College of Radiology Code of Ethics (77.2% and 67.4% of respondents, respectively). With regard to ethics education during medical school and residency, 57.3% and 70.0% of respondents, respectively, found such education to be insufficient. Medical ethics training should be highlighted during residency, at specialty society meetings, and in journals and online resources for radiologists.

  19. "Patient care in radiology"

    DEFF Research Database (Denmark)

    Bro Brask, Kirsten; Birkelund, Regner

    2014-01-01

    The aim of this study was to research how the staff experience care expressed during the brief encounter with the patients in a diagnostic imaging department. This was a qualitative study with a phenomenological and hermeneutical frame of reference. The data were collected using field observations...... was electronically forwarded. And, care expressed in between was perceived as care in the traditional sense and termed as “patient care in radiology.”...

  20. 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.

  1. 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.)

  2. 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.

  3. Radiological manifestations of melioidosis

    Energy Technology Data Exchange (ETDEWEB)

    Lim, K.S., E-mail: kianslim@gmail.co [Department of Radiology, Raja Isteri Pengiran Anak Saleha (RIPAS) Hospital, Bandar Seri Begawan BA 1710 (Brunei Darussalam); Chong, V.H. [Department of Medicine, Raja Isteri Pengiran Anak Saleha (RIPAS) Hospital, Bandar Seri Begawan BA 1710 (Brunei Darussalam)

    2010-01-15

    Melioidosis is a serious infection that is associated with high mortality. It is due to a Gram-negative bacterium, Burkholderia pseudomallei which is an environmental saprophyte found in wet soils. Melioidosis is endemic to northern Australia and the Southeast Asia. However, there is now increasing number of reports of imported cases to regions where this infection has not been previously encountered. Almost any organ can be affected. Like many other conditions, radiological imaging is an integral part of the diagnostic workup of melioidosis. Awareness of the various radiological manifestations can help direct appropriate investigations to achieve early diagnosis and the initiation of appropriate treatment. Generally, there are no known characteristic features on imaging that can specifically differentiate melioidosis from other infections. However, the 'honeycomb' appearance has been described to be characteristic for large melioidosis liver abscesses. Simultaneous involvement of various organs is also characteristics. To date, there are few data available on the radiological manifestations of melioidosis. The present pictorial essay describes melioidosis affecting the various organs.

  4. Measurement and microscopic analysis of the B-11((p)over-right-arrow,(p)over-right-arrow) reaction at E-p=150 MeV. I. Inelastic scattering

    NARCIS (Netherlands)

    Hannen, VM; Amos, K; van den Berg, AM; Bieber, RK; Deb, PK; Ellinghaus, F; Frekers, D; Hagemann, M; Harakeh, MN; Heyse, J; de Huu, MA; Krusemann, BAM; Schmidt, R; van der Werf, SY; Wortche, HJ

    Cross sections and analyzing powers for the B-11((p) over right arrow ,p(')) reaction have been measured using a 150-MeV polarized proton beam from the AGOR cyclotron at KVI. For the stronger inelastic transitions, also spin-flip probabilities have been extracted. To predict cross sections and spin

  5. Radiology and the mobile device: Radiology in motion

    OpenAIRE

    Panughpath, Sridhar G; Arjun Kalyanpur

    2012-01-01

    The use of mobile devices is revolutionizing the way we communicate, interact, are entertained, and organize our lives. With healthcare in general and radiology in particular becoming increasingly digital, the use of such devices in radiologic practice is inevitable. This article reviews the current status of the use of mobile devices in the clinical practice of radiology, namely in emergency teleradiology. Technical parameters such as luminance and resolution are discussed. The article also ...

  6. Broken symmetries in a location-invariant word recognition network.

    Science.gov (United States)

    Hannagan, Thomas; Dandurand, Frédéric; Grainger, Jonathan

    2011-01-01

    We studied the feedforward network proposed by Dandurand et al. (2010), which maps location-specific letter inputs to location-invariant word outputs, probing the hidden layer to determine the nature of the code. Hidden patterns for words were densely distributed, and K-means clustering on single letter patterns produced evidence that the network had formed semi-location-invariant letter representations during training. The possible confound with superseding bigram representations was ruled out, and linear regressions showed that any word pattern was well approximated by a linear combination of its constituent letter patterns. Emulating this code using overlapping holographic representations (Plate, 1995) uncovered a surprisingly acute and useful correspondence with the network, stemming from a broken symmetry in the connection weight matrix and related to the group-invariance theorem (Minsky & Papert, 1969). These results also explain how the network can reproduce relative and transposition priming effects found in humans.

  7. Fluorescence microscopy with diffraction resolution barrier broken by stimulated emission.

    Science.gov (United States)

    Klar, T A; Jakobs, S; Dyba, M; Egner, A; Hell, S W

    2000-07-18

    The diffraction barrier responsible for a finite focal spot size and limited resolution in far-field fluorescence microscopy has been fundamentally broken. This is accomplished by quenching excited organic molecules at the rim of the focal spot through stimulated emission. Along the optic axis, the spot size was reduced by up to 6 times beyond the diffraction barrier. The simultaneous 2-fold improvement in the radial direction rendered a nearly spherical fluorescence spot with a diameter of 90-110 nm. The spot volume of down to 0.67 attoliters is 18 times smaller than that of confocal microscopy, thus making our results also relevant to three-dimensional photochemistry and single molecule spectroscopy. Images of live cells reveal greater details.

  8. Parity-time symmetry broken by point-group symmetry

    Energy Technology Data Exchange (ETDEWEB)

    Fernández, Francisco M., E-mail: fernande@quimica.unlp.edu.ar; Garcia, Javier [INIFTA (UNLP, CCT La Plata-CONICET), División Química Teórica, Blvd. 113 S/N, Sucursal 4, Casilla de Correo 16, 1900 La Plata (Argentina)

    2014-04-15

    We discuss a parity-time (PT) symmetric Hamiltonian with complex eigenvalues. It is based on the dimensionless Schrödinger equation for a particle in a square box with the PT-symmetric potential V(x, y) = iaxy. Perturbation theory clearly shows that some of the eigenvalues are complex for sufficiently small values of |a|. Point-group symmetry proves useful to guess if some of the eigenvalues may already be complex for all values of the coupling constant. We confirm those conclusions by means of an accurate numerical calculation based on the diagonalization method. On the other hand, the Schrödinger equation with the potential V(x, y) = iaxy{sup 2} exhibits real eigenvalues for sufficiently small values of |a|. Point group symmetry suggests that PT-symmetry may be broken in the former case and unbroken in the latter one.

  9. Inflation via Gravitino Condensation in Dynamically Broken Supergravity

    CERN Document Server

    Alexandre, Jean; Mavromatos, Nick E

    2015-01-01

    Gravitino-condensate-induced inflation via the super-Higgs effect is a UV-motivated scenario for both inflating the early universe and breaking local supersymmetry dynamically, entirely independent of any coupling to external matter. As an added benefit, this also removes the (as of yet unobserved) massless Goldstino associated to global supersymmetry breaking from the particle spectrum. In this review we detail the pertinent properties and outline previously hidden details of the various steps required in this context in order to make contact with current inflationary phenomenology. The class of models of SUGRA we use to exemplify our approach are minimal four-dimensional N=1 supergravity and conformal extensions thereof (with broken conformal symmetry). Therein, the gravitino condensate itself can play the role of the inflaton, however the requirement of slow-roll necessitates unnaturally large values of the wave-function renormalisation. Nevertheless, there is an alternative scenario that may provide Staro...

  10. Statistical Mechanics where Newton’s Third Law is Broken

    Directory of Open Access Journals (Sweden)

    A. V. Ivlev

    2015-03-01

    Full Text Available There is a variety of situations in which Newton’s third law is violated. Generally, the action-reaction symmetry can be broken for mesoscopic particles, when their effective interactions are mediated by a nonequilibrium environment. Here, we investigate different classes of nonreciprocal interactions relevant to real experimental situations and present their basic statistical mechanics analysis. We show that in mixtures of particles with such interactions, distinct species acquire distinct kinetic temperatures. In certain cases, the nonreciprocal systems are exactly characterized by a pseudo-Hamiltonian; i.e., being intrinsically nonequilibrium, they can nevertheless be described in terms of equilibrium statistical mechanics. Our results have profound implications, in particular, demonstrating the possibility to generate extreme temperature gradients on the particle scale. We verify the principal theoretical predictions in experimental tests performed with two-dimensional binary complex plasmas.

  11. Broken data: Conceptualising data in an emerging world

    Directory of Open Access Journals (Sweden)

    Sarah Pink

    2018-01-01

    Full Text Available In this article, we introduce and demonstrate the concept-metaphor of broken data. In doing so, we advance critical discussions of digital data by accounting for how data might be in processes of decay, making, repair, re-making and growth, which are inextricable from the ongoing forms of creativity that stem from everyday contingencies and improvisatory human activity. We build and demonstrate our argument through three examples drawn from mundane everyday activity: the incompleteness, inaccuracy and dispersed nature of personal self-tracking data; the data cleaning and repair processes of Big Data analysis and how data can turn into noise and vice versa when they are transduced into sound within practices of music production and sound art. This, we argue is a necessary step for considering the meaning and implications of data as it is increasingly mobilised in ways that impact society and our everyday worlds.

  12. 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

  13. 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.

  14. 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.

  15. Educational treasures in Radiology: Radiolopolis – an international Radiology community

    Science.gov (United States)

    Talanow, Roland; Giesel, Frederik

    2009-01-01

    This article focuses on a relatively new concept in the Internet: “Social networking” and especially on one program that successfully found a unique way to provide a social network for Radiology: Radiolopolis. Radiolopolis (www.Radiolopolis.com) is an international Radiology network to promote education, research and clinical practice in Radiology. What makes this Radiology community unique and special is that the founders of Radiolopolis implemented multiple educational and clinical/practical programs which have been developed over the past years. PMID:22470687

  16. UTILIZATION OF AMINO ACIDS OF BROKEN RICE IN GROWING PIGS

    Directory of Open Access Journals (Sweden)

    Matej Brestenský

    2014-02-01

    Full Text Available The six cannulated gilts (initial body weight 35.8 ± 0.5 kg fitted with a T-cannula in terminal ileum, were used to determine the apparent (AID and standardized (SID ileal digestibility of nitrogen (N and amino acids (AA in broken rice. Animals were fed twice daily in a two equal doses at a daily rate of 80 g.kg - 0.75. Water was offered ad libitum. The tested feed was the sole source of protein in the diet. The N-free diet was used to determine the ileal endogenous flow of AA and N. Chromium oxide (Cr2O3 was added to the diets as an indigestible marker in an amount of 0.3 % per kg of diet. After a 14 d postoperative period a 6 d adaptation period followed during which the animals were fed with an experimental diet. On d 7 ileal digesta was collected continuously for 24 h. The AID and SID of AA and N were calculated using analytically determined values of N, Cr2O3 and AA. The SID of AA was in a range from 81.6 % (tyrosine to 112.6 % (proline (P 0.05, respectively. There were no differences between standardized ileal digestibility of essential amino acids (94.3 % and nonessential amino acids (95.3 %. Regarding the ileal digestibility of AA, broken rice, a by-product from the food industry, is an appropriate source of digestible AA for growing pigs.

  17. Conformality lost: Broken symmetries in the early universe

    Science.gov (United States)

    Joyce, Austin

    In this dissertation, we introduce and investigate a general framework to describe the dynamics of the early universe. This mechanism is based on spontaneously broken conformal symmetry; we find that spectator fields in the theory can acquire a scale invariant spectrum of perturbations under generic conditions. Before introducing the conformal mechanism, we first consider the landscape of cosmologies involving a single scalar field which can address the canonical early universe puzzles. We find that, generically, single field non-inflationary solutions become strongly-coupled. We are therefore led to consider theories with multiple fields. We introduce the conformal mechanism via specific examples before constructing the most general effective theory for the conformal mechanism by utilizing the coset construction familiar from particle physics to construct the lagrangian for the Goldstone field of the broken conformal symmetry. This theory may be observationally distinguished from inflation by considering the non-linearly realized conformal symmetries. We systematically derive the Ward identities associated to the non-linearly realized symmetries, which relate (N + 1)-point correlation functions with a soft external Goldstone to N-point functions, and discuss observational implications, which cannot be mimicked by inflation. Finally, we consider violating the null energy condition (NEC) within the general framework considered. We show that the DBI conformal galileons, derived from the world-volume theory of a 3-brane moving in an Anti-de Sitter bulk, admit a background which violates the NEC. Unlike other known examples of NEC violation, such as ghost condensation and conformal galileons, this theory also admits a stable, Poincare-invariant vacuum. However, perturbations around deformations of this solution propagate superluminally.

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

    Science.gov (United States)

    Vokhidov, Husan; Hong, Hyung Gil; Kang, Jin Kyu; Hoang, Toan Minh; Park, Kang Ryoung

    2016-12-16

    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.

  19. 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.

  20. 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.

  1. Gender and Spatial Ability and the Use of Specific Labels and Diagrammatic Arrows in a Micro-Level Chemistry Animation

    Science.gov (United States)

    Falvo, David A.; Suits, Jerry P.

    2009-01-01

    This study investigates the effects of using both specific labels and diagrammatic arrows in the animation of salt dissolution. Four different versions of the animation served as treatments that were developed based upon principles of educational technology and cognitive psychology. The researchers studied the effects of spatial ability (high or…

  2. The arthroscopic treatment of displaced tibial spine fractures in children and adolescents using Meniscus Arrows(A (R))

    NARCIS (Netherlands)

    Wouters, Diederick B.; de Graaf, Joost S.; Hemmer, Patrick H.; Burgerhof, Johannes G. M.; Kramer, William L. M.

    This article summarises the results of a newly developed technique that utilises Meniscus Arrows(A (R)) for the arthroscopic fixation of displaced tibial spine fractures in children and adolescents. Twelve tibial spine fractures in the knees of eleven children between 6 and 15 years old, with an

  3. 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

  4. Radiological safety and control

    Energy Technology Data Exchange (ETDEWEB)

    Seo, Kyeong Won; You, Young Soo; Chang, Sea Young; Yoon, Yeo Chang; Yoon, Suk Chul; Kim, Jang Yeol; Lee, Tae Young; Lee, Bong Jae; Kim, Bong Hwan; Lee, Jong Il; Jeong, Juk Yeon; Lee, Sang Yeol; Jeong, Kyung Ki; Jeong, Rae Ik; Kim, Jong Su; Han, Young Dae; Lee, Hyung Sub; Kim, Chang Kyung [Korea Atomic Energy Research Institute, Taejon (Korea, Republic of)

    1994-01-01

    This report describes the annual results of radiological safety and control program. This program includes working area monitoring (WAM), personnel radiation monitoring (PRM), education for radiation protection (ERP), preparing for KMRR operation and developing QA program on personal dose evaluation. As a result, the objectives of radiation protection have been achieved satisfactorily through the WAM, PRM and ERP. The QA program on personal dose evaluation has been approved by the MOST according to the Ministerial Ordinance (No. 1992-15). KAERI has also been authorized as a specialized processor for personal dose evaluation. 32 tabs., 20 figs. (Author) .new.

  5. Characterization of radiological emergencies

    Energy Technology Data Exchange (ETDEWEB)

    Chester, C.V.

    1985-01-01

    Several severe radiological emergencies were reviewed to determine the likely range of conditions which must be coped with by a mobile teleoperator designed for emergencies. The events reviewed included accidents at TMI (1978), SL-1 (1961), Y-12 (1958), Bethesda (1982), Chalk River (1952 and 1958), Lucens (1969). The important conditions were: radiation fields over 10,000 R/h, severe contamination, possible critical excursion, possible inert atmosphere, temperatures from 50/sup 0/C to -20/sup 0/C, 100% relative humidity, 60-cm-high obstacles, stairs, airlocks, darkness, and lack of electric power.

  6. Smart Radiological Dosimeter

    Energy Technology Data Exchange (ETDEWEB)

    Kosslow, William J.; Bandzuch, Gregory S.

    2004-07-20

    A radiation dosimeter providing an indication of the dose of radiation to which the radiation sensor has been exposed. The dosimeter contains features enabling the monitoring and evaluating of radiological risks so that a user can concentrate on the task at hand. The dosimeter provides an audible alarm indication that a predetermined time period has elapsed, an audible alarm indication reminding the user to check the dosimeter indication periodically, an audible alarm indicating that a predetermined accumulated dose has been prematurely reached, and an audible alarm indication prior or to reaching the 3/4 scale point.

  7. 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.

  8. Membrane bound GSK-3 activates Wnt signaling through disheveled and arrow.

    Directory of Open Access Journals (Sweden)

    Anirudh G Mannava

    Full Text Available Wnt ligands and their downstream pathway components coordinate many developmental and cellular processes. In adults, they regulate tissue homeostasis through regulation of stem cells. Mechanistically, signal transduction through this pathway is complicated by pathway components having both positive and negative roles in signal propagation. Here we examine the positive role of GSK-3/Zw3 in promoting signal transduction at the plasma membrane. We find that targeting GSK-3 to the plasma membrane activates signaling in Drosophila embryos. This activation requires the presence of the co-receptor Arrow-LRP5/6 and the pathway activating protein Disheveled. Our results provide genetic evidence for evolutionarily conserved, separable roles for GSK-3 at the membrane and in the cytosol, and are consistent with a model where the complex cycles from cytosol to membrane in order to promote signaling at the membrane and to prevent it in the cytosol.

  9. Hijacking Subaltern’s history (broken bodies, broken voices: Decolonial critique of ‘Subaltern whiteness’ in South Africa

    Directory of Open Access Journals (Sweden)

    Chammah J. Kaunda

    2017-02-01

    Full Text Available This article uses decolonial to critique the discourse of ‘subaltern whiteness’ by questioning some Afrikaner scholars’ morality of regarding ‘white Afrikaners as subaltern’. Subaltern designates submerged, subordinated, exploited or suppressed – those whose voices have been historically muted, their humanity stripped by those with sociopolitical and economic power. Within South Africa, this raises the question: to what extent can white Afrikaners be regarded as subaltern? The article proposes indivisibility of epistemic vulnerability and regenerative theological praxis both emerging within Afrikaner theological discussion as viable response to broken bodies of those who still bear the marks or scars of apartheid and rather not to seek to hijack their voice.

  10. Hijacking Subaltern’s history (broken bodies, broken voices: Decolonial critique of ‘Subaltern whiteness’ in South Africa

    Directory of Open Access Journals (Sweden)

    Chammah J. Kaunda

    2017-11-01

    Full Text Available This article uses decolonial to critique the discourse of ‘subaltern whiteness’ by questioning some Afrikaner scholars’ morality of regarding ‘white Afrikaners as subaltern’. Subaltern designates submerged, subordinated, exploited or suppressed – those whose voices have been historically muted, their humanity stripped by those with sociopolitical and economic power. Within South Africa, this raises the question: to what extent can white Afrikaners be regarded as subaltern? The article proposes indivisibility of epistemic vulnerability and regenerative theological praxis both emerging within Afrikaner theological discussion as viable response to broken bodies of those who still bear the marks or scars of apartheid and rather not to seek to hijack their voice.

  11. 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...

  12. 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.

  13. The emergence of time's arrows and special science laws from physics.

    Science.gov (United States)

    Loewer, Barry

    2012-02-06

    In this paper, I will argue that there is an important connection between two questions concerning how certain features of the macro world emerge from the laws and processes of fundamental microphysics and suggest an approach to answering these questions. The approach involves a kind of emergence but quite different from 'top-down' emergence discussed at the conference, for which an earlier version of this paper was written. The two questions are (i) How do 'the arrows of time' emerge from microphysics? (ii) How do macroscopic special science laws and causation emerge from microphysics? Answering these questions is especially urgent for those, who like myself, think that a certain version of physicalism, which I call 'micro-physical completeness' (MC), is true. According to MC, there are fundamental dynamical laws that completely govern (deterministically or probabilistically), the evolution of all micro-physical events and there are no additional ontologically independent dynamical or causal special science laws. In other words, there is no ontologically independent 'top-down' causation. Of course, MC does not imply that physicists now or ever will know or propose the complete laws of physics. Or even if the complete laws were known we would know how special science properties and laws reduce to laws and properties of fundamental physics. Rather, MC is a contingent metaphysical claim about the laws of our world. After a discussion of the two questions, I will argue the key to showing how it is possible for the arrows of time and the special science laws to emerge from microphysics and a certain account of how thermodynamics is related to fundamental dynamical laws.

  14. [Ergonomically designed radiology workplace].

    Science.gov (United States)

    Knogler, T; Ringl, H

    2014-01-01

    An ergonomically designed radiology workplace is a key factor for concentrated work during the whole day and is essential in preventing negative long-term effects due to inappropriate physical strain. To avoid such negative effects it is of paramount importance to know the factors that might cause strain on the radiologist, the appropriate application for workplace design to address these factors and how work-related disorders emerge. To minimize physical strain due to long-lasting and repetitive movements, the workspace must be adapted to the physical needs of the radiologist. Adjustable settings for the work desk and seat, together with correct screen positioning and distance from the screen, are examples of such important factors in an ergonomic workplace design. In addition, adjustable ambient light, an adjustable conditioned climate, an appropriate color design for the environment and a reduction of unnecessary noise are also crucial factors for an ergonomic workplace. This review gives an overview about the factors that influence the radiology workspace and summarizes the current literature on this topic.

  15. 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.

  16. Archives: SA Journal of Radiology

    African Journals Online (AJOL)

    Items 1 - 46 of 46 ... Archives: SA Journal of Radiology. Journal Home > Archives: SA Journal of Radiology. Log in or Register to get access to full text downloads. Username, Password, Remember me, or Register · Journal Home · ABOUT THIS JOURNAL · Advanced Search · Current Issue · Archives. 1 - 46 of 46 Items. 2017 ...

  17. Building Relations with Radiology Administrators

    Directory of Open Access Journals (Sweden)

    Megan Kalambo

    2017-06-01

    Full Text Available In some radiology departments, the lack of alignment between administrators and radiologists can pose significant challenges. This article describes how differences in background and priorities between administrators and radiologists can contribute to conflict and presents strategies on how to manage the conflict in a way that can leverage positive change. Strategies to build relations between radiologists and radiology administrators are described.

  18. Building Relations with Radiology Administrators.

    Science.gov (United States)

    Kalambo, Megan; Parikh, Jay R

    2017-06-07

    In some radiology departments, the lack of alignment between administrators and radiologists can pose significant challenges. This article describes how differences in background and priorities between administrators and radiologists can contribute to conflict and presents strategies on how to manage the conflict in a way that can leverage positive change. Strategies to build relations between radiologists and radiology administrators are described.

  19. Schrödinger operators on a periodically broken zigzag carbon ...

    Indian Academy of Sciences (India)

    In this paper, we study the spectra of Schrödinger operators on zigzag carbon nanotubes, which are broken by abrasion or during refining process. Throughout this paper, we assume that the carbon nanotubes are broken periodically and we deal with one of those models. Making use of the Floquet–Bloch theory, we ...

  20. Energy dissipation in thirty-foot broken-back culverts using laboratory models.

    Science.gov (United States)

    2014-09-01

    This research investigates the reduction in scour downstream of a broken-back culvert by forming a hydraulic jump : inside the culvert. A broken-back culvert is used in areas of high relief and steep topography as it has one or more breaks in profile...

  1. Schrödinger operators on a periodically broken zigzag carbon ...

    Indian Academy of Sciences (India)

    nanotubes change if they are broken. The aim of this paper is to study spectral properties of Schrödinger operator on a 'broken' carbon nanotube. Carbon nanotubes are graphene sheets with a cylindrical structure and are divided into three classes: zigzag, armchair and chiral. In this paper, we deal with zigzag nanotubes.

  2. Removal of a Broken Cannulated Femoral Nail: A Novel Retrograde Impaction Technique

    Directory of Open Access Journals (Sweden)

    Kongkhet Riansuwan

    2013-01-01

    Full Text Available This report presents a surgical technique to remove a broken cannulated nail from the femur. A Harrington rod was modified for retrograde impaction of the retained fragment. The broken implant was finally removed without complication. This particular procedure was safe, simple, and promising.

  3. Listening to What Cannot Be Said: Broken Narratives and the Lived Body

    Science.gov (United States)

    Kokanovic, Renata; Stone, Meredith

    2018-01-01

    The core of this special issue of "Arts and Humanities in Higher Education" emerged from the "Broken Narratives and the Lived Body" conference held in 2016. The "Broken Narrative" essays included in this issue open up a critical space for understanding and theorising illness narratives that defy a conventional…

  4. 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...

  5. Cracked and broken teeth--definitions, differential diagnosis and treatment.

    Science.gov (United States)

    Paul, R A; Tamse, A; Rosenberg, E

    2007-04-01

    Cracked and broken teeth present a diagnostic dilemma to the dentist and the sooner a correct diagnosis is made the greater are the chances to save the tooth. As the location, direction and size of the crack or fracture dictates the choice of treatment, it is important to first define the types of cracks and fractures in the coronal and radicular tooth structure. Cracks and fractures can be classified as follows: 1. craze lines 2. fractured cusps 3. cracked teeth 4. split teeth 5. vertical root fractures. The vertical root fracture has been described recently in two articles in this publication, and therefore will not be discussed here. Diagnosis of a cracked tooth is not always initially obvious. The patient's response to clinical testing is the primary diagnostic tool along with the dental history provided by the patient. Radiographs are secondary in making a diagnosis. Clinical aids for reproducing the patient's symptoms such as occlusal bite devices, observing occlusal wear facets and the application of cold water to one tooth at a time may isolate the offending tooth. In situations where an irreversible pulpitis is diagnosed, endodontic treatment is indicated. In the case of a questionable diagnosis, or one in which a potential reversible pulpitis is made, a provisional restoration can be placed for an unspecified time as a diagnostic aid. If endodontic therapy were indicated, consultation with the patient as to the compromised prognosis and the alternatives to endodontic treatment is essential.

  6. Spontaneously broken spacetime symmetries and the role of inessential Goldstones

    Science.gov (United States)

    Klein, Remko; Roest, Diederik; Stefanyszyn, David

    2017-10-01

    In contrast to internal symmetries, there is no general proof that the coset construction for spontaneously broken spacetime symmetries leads to universal dynamics. One key difference lies in the role of Goldstone bosons, which for spacetime symmetries includes a subset which are inessential for the non-linear realisation and hence can be eliminated. In this paper we address two important issues that arise when eliminating inessential Goldstones. The first concerns the elimination itself, which is often performed by imposing so-called inverse Higgs constraints. Contrary to claims in the literature, there are a series of conditions on the structure constants which must be satisfied to employ the inverse Higgs phenomenon, and we discuss which parametrisation of the coset element is the most effective in this regard. We also consider generalisations of the standard inverse Higgs constraints, which can include integrating out inessential Goldstones at low energies, and prove that under certain assumptions these give rise to identical effective field theories for the essential Goldstones. Secondly, we consider mappings between non-linear realisations that differ both in the coset element and the algebra basis. While these can always be related to each other by a point transformation, remarkably, the inverse Higgs constraints are not necessarily mapped onto each other under this transformation. We discuss the physical implications of this non-mapping, with a particular emphasis on the coset space corresponding to the spontaneous breaking of the Anti-De Sitter isometries by a Minkowski probe brane.

  7. Orebody Modelling for Exploration: The Western Mineralisation, Broken Hill, NSW

    Energy Technology Data Exchange (ETDEWEB)

    Lotfolah Hamedani, Mohammad, E-mail: mlotfham@gmail.com; Plimer, Ian Rutherford [University of Adelaide, School of Earth and Environmental Sciences (Australia); Xu Chaoshui [University of Adelaide, School of Civil, Environmental and Mining Engineering (Australia)

    2012-09-15

    The Western Mineralisation in the Broken Hill deposit was studied to identify the zonation sequence of lithogeochemical haloes along and across the strike of the orebody. Samples used are from 77 drill holes and the samples were assayed for Pb, Zn, Fe, S, Cu, Ag, Cd, Sb, Bi and As. Variogram analyses were calculated for all the elements and kriging was used to construct the 3D block model. Analysis of cross sections along and across the strike of the orebody shows that Bi and Sb form broader halos around sulphide masses and this suggests that they are pathfinder elements for the Pb and Zn elements of this orebody. The threshold concentrations (minimum anomaly) of the 10 elements were determined using the concentration-area analysis. On east-west vertical cross sections, the values of linear productivity, variability gradient and zonality index were calculated for each element. Based on the maximum zonality index of each element, the sequence of geochemical zonation pattern was determined from top to bottom of the orebody. The result shows that S, Pb, Zn and Cd tend to concentrate in the upper part of the mineralisation whereas Ag, Cu, Bi and As have a tendency to concentrate in the lower part of the mineralised rocks. Also, an empirical product ratio index was developed based on the position of the elements in the zonation sequence. The methods and results of this research are applicable to exploration of similar Zn and Pb sulphide ore deposits.

  8. Attention modulates adaptive motor learning in the 'broken escalator' paradigm.

    Science.gov (United States)

    Patel, Mitesh; Kaski, Diego; Bronstein, Adolfo M

    2014-07-01

    The physical stumble caused by stepping onto a stationary (broken) escalator represents a locomotor aftereffect (LAE) that attests to a process of adaptive motor learning. Whether such learning is primarily explicit (requiring attention resources) or implicit (independent of attention) is unknown. To address this question, we diverted attention in the adaptation (MOVING) and aftereffect (AFTER) phases of the LAE by loading these phases with a secondary cognitive task (sequential naming of a vegetable, fruit and a colour). Thirty-six healthy adults were randomly assigned to 3 equally sized groups. They performed 5 trials stepping onto a stationary sled (BEFORE), 5 with the sled moving (MOVING) and 5 with the sled stationary again (AFTER). A 'Dual-Task-MOVING (DTM)' group performed the dual-task in the MOVING phase and the 'Dual-Task-AFTEREFFECT (DTAE)' group in the AFTER phase. The 'control' group performed no dual task. We recorded trunk displacement, gait velocity and gastrocnemius muscle EMG of the left (leading) leg. The DTM, but not the DTAE group, had larger trunk displacement during the MOVING phase, and a smaller trunk displacement aftereffect compared with controls. Gait velocity was unaffected by the secondary cognitive task in either group. Thus, adaptive locomotor learning involves explicit learning, whereas the expression of the aftereffect is automatic (implicit). During rehabilitation, patients should be actively encouraged to maintain maximal attention when learning new or challenging locomotor tasks.

  9. Interpretive Error in Radiology.

    Science.gov (United States)

    Waite, Stephen; Scott, Jinel; Gale, Brian; Fuchs, Travis; Kolla, Srinivas; Reede, Deborah

    2017-04-01

    Although imaging technology has advanced significantly since the work of Garland in 1949, interpretive error rates remain unchanged. In addition to patient harm, interpretive errors are a major cause of litigation and distress to radiologists. In this article, we discuss the mechanics involved in searching an image, categorize omission errors, and discuss factors influencing diagnostic accuracy. Potential individual- and system-based solutions to mitigate or eliminate errors are also discussed. Radiologists use visual detection, pattern recognition, memory, and cognitive reasoning to synthesize final interpretations of radiologic studies. This synthesis is performed in an environment in which there are numerous extrinsic distractors, increasing workloads and fatigue. Given the ultimately human task of perception, some degree of error is likely inevitable even with experienced observers. However, an understanding of the causes of interpretive errors can help in the development of tools to mitigate errors and improve patient safety.

  10. Obesitiy and Diagnostic Radiology

    Directory of Open Access Journals (Sweden)

    Erkan Gokce

    2013-09-01

    Full Text Available Use of medical imaging depending upon the comorbidity diseases and bariatric diseased for obese people has increased along with the increase at obesity prevalence. Due to large body structure and increased fatty tissue in obese patients, it is hard to carry out radiological studies and obtain images on diagnostic quality. Moreover, obese patients and #8217; subjecting to more radiation dose in examinations including ionizing radiation is another disadvantage. In order to perform diagnostic imaging process in obese patients, imaging equipment in accordance with the patient weight and diameter and examination rooms should be provided; and examination parameters should be organized according to the patient in a way that can be obtained the best imaging quality. [J Contemp Med 2013; 3(3.000: 218-226

  11. 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.

  12. Abdominal hernias: Radiological features

    Science.gov (United States)

    Lassandro, Francesco; Iasiello, Francesca; Pizza, Nunzia Luisa; Valente, Tullio; Stefano, Maria Luisa Mangoni di Santo; Grassi, Roberto; Muto, Roberto

    2011-01-01

    Abdominal wall hernias are common diseases of the abdomen with a global incidence approximately 4%-5%. They are distinguished in external, diaphragmatic and internal hernias on the basis of their localisation. Groin hernias are the most common with a prevalence of 75%, followed by femoral (15%) and umbilical (8%). There is a higher prevalence in males (M:F, 8:1). Diagnosis is usually made on physical examination. However, clinical diagnosis may be difficult, especially in patients with obesity, pain or abdominal wall scarring. In these cases, abdominal imaging may be the first clue to the correct diagnosis and to confirm suspected complications. Different imaging modalities are used: conventional radiographs or barium studies, ultrasonography and Computed Tomography. Imaging modalities can aid in the differential diagnosis of palpable abdominal wall masses and can help to define hernial contents such as fatty tissue, bowel, other organs or fluid. This work focuses on the main radiological findings of abdominal herniations. PMID:21860678

  13. Radiology of bacterial pneumonia

    Energy Technology Data Exchange (ETDEWEB)

    Vilar, Jose E-mail: vilar_jlu@gva.es; Domingo, Maria Luisa; Soto, Cristina; Cogollos, Jonathan

    2004-08-01

    Bacterial pneumonia is commonly encountered in clinical practice. Radiology plays a prominent role in the evaluation of pneumonia. Chest radiography is the most commonly used imaging tool in pneumonias due to its availability and excellent cost benefit ratio. CT should be used in unresolved cases or when complications of pneumonia are suspected. The main applications of radiology in pneumonia are oriented to detection, characterisation and follow-up, especially regarding complications. The classical classification of pneumonias into lobar and bronchial pneumonia has been abandoned for a more clinical classification. Thus, bacterial pneumonias are typified into three main groups: Community acquired pneumonia (CAD), Aspiration pneumonia and Nosocomial pneumonia (NP).The usual pattern of CAD is that of the previously called lobar pneumonia; an air-space consolidation limited to one lobe or segment. Nevertheless, the radiographic patterns of CAD may be variable and are often related to the causative agent. Aspiration pneumonia generally involves the lower lobes with bilateral multicentric opacities. Nosocomial Pneumonia (NP) occurs in hospitalised patients. The importance of NP is related to its high mortality and, thus, the need to obtain a prompt diagnosis. The role of imaging in NP is limited but decisive. The most valuable information is when the chest radiographs are negative and rule out pneumonia. The radiographic patterns of NP are very variable, most commonly showing diffuse multifocal involvement and pleural effusion. Imaging plays also an important role in the detection and evaluation of complications of bacterial pneumonias. In many of these cases, especially in hospitalised patients, chest CT must be obtained in order to better depict these associate findings.

  14. Sexual Harassment in Radiology.

    Science.gov (United States)

    Camargo, Aline; Liu, Li; Yousem, David M

    2017-08-01

    To gauge the prevalence of sexual harassment (SH) and to understand the issues regarding its disclosure among radiologists. A questionnaire on ethics and SH was sent by e-mail to 1,569 radiologists and radiology trainees in an institutional database maintained for continuing medical education purposes on three separate occasions between September 17 and October 31, 2016. The link to the survey was also posted on social media sites via the authors' divisional and institutional accounts on Facebook, Twitter, Instagram, and Aunt Minnie, as well as on ACR and RSNA web blogs. Overall, 9.75% (39 of 400) respondents stated they had suffered SH, with more female (22 of 90 = 24.4%) than male victims (11 of 249 = 4.4%) (P < .001). Only 29.4% of SH victims said they would likely report SH (P < .001). Women (46 of 90 = 51.1%) said they were less likely to report SH than men (150 of 242 = 62.0%) (P = .03), and American medical school graduates (119 of 220 = 54.1%) were less likely than graduates from outside the United States (37 of 48 = 77.1%). Of 401 respondents to questions on SH, 28.7% (n = 115), including more women (38 of 91 = 41.8%) than men (61 of 249 = 24.5%) (P = .002), said they had witnessed SH. By percentage responding, female radiologists are more frequently victims and witnesses of sexual harassment but are less likely to report such cases. Steps need to be taken to eliminate a culture that leads radiologists to tolerate SH without addressing it. Copyright © 2017 American College of Radiology. Published by Elsevier Inc. All rights reserved.

  15. Laparoscopic retrieval of a foreign body (broken surgical knife from retroperitoneal space: An interesting case

    Directory of Open Access Journals (Sweden)

    Dipak Limbachia

    2017-11-01

    Full Text Available We present a rare and interesting case, of a retrieval of a broken surgical knife blade, from the retroperitoneal space, through laparoscopic approach by a gynecology endoscopist. A 40-year-old man underwent open lumbar discectomy surgery, when the surgical knife blade inadvertently broke, and was retained in the disc space. The broken blade could not be removed during the initial surgery. A second attempt was made to retrieve it; however, it migrated further anteriorly into the retroperitoneal space. Subsequently, a gynecology endoscopist was called in, who successfully retrieved the broken blade from the retroperitoneal space through laparoscopic approach. A four-port laparoscopic transperitoneal approach was performed. The broken fragment of the knife was found just medial to the left common iliac artery in the retroperitoneal space, which was removed. Operation time was 40 minutes and the postoperative course was uneventful. Keywords: broken knife, foreign body, laparoscopy, retroperitoneal

  16. Radiological anatomy - evaluation of integrative education in radiology.

    Science.gov (United States)

    Dettmer, S; Schmiedl, A; Meyer, S; Giesemann, A; Pabst, R; Weidemann, J; Wacker, F K; Kirchhoff, T

    2013-09-01

    Evaluation and analysis of the integrative course "Radiological Anatomy" established since 2007 at the Medical School Hannover (MHH) in comparison with conventional education. Anatomy and radiology are usually taught separately with a considerable time lag. Interdisciplinary teaching of these associated subjects seems logical for several reasons. Therefore, the integrative course "Radiological Anatomy" was established in the second year of medical education, combining these two closely related subjects. This interdisciplinary course was retrospectively evaluated by consideration of a student questionnaire and staff observations. The advantages and disadvantages of integrative teaching in medical education are discussed. The course ratings were excellent (median 1; mean 1.3 on a scale of 1 to 6). This is significantly (p radiology increased during the course (88 %). According to the students' suggestions the course was enhanced by a visitation in the Department of Radiology and the additional topic central nervous system. Integrative teaching of anatomy and radiology was well received by the students. Both, anatomical and radiological comprehension and the motivation to learn were improved. However, it should be considered, that the amount of work and time required by the teaching staff is considerably increased compared to traditional teaching. © Georg Thieme Verlag KG Stuttgart · New York.

  17. Analysis of the Radiology Reports from Radiology Clinics

    Energy Technology Data Exchange (ETDEWEB)

    Kim, Eun Jin; Kwack, Kyu Sung; Cho, Jae Hyun; Jang, Eun Ho [Ajou University Medical Center, Suwon (Korea, Republic of)

    2009-10-15

    The purpose of this study was to investigate the form and content of the radiology reports from radiology clinics in Korea. One hundred and sixty six radiology reports from 49 radiology clinics were collected, and these reports were referred to the academic tertiary medical center from March 2008 to February 2009. These included reports for CT (n = 18), MRI (n = 146) and examinations not specified (n = 2). Each report was evaluated for the presence of required contents (demographics, technical information, findings, conclusion, the name, license number and signature of the radiologist and the referring facility). These requirements were based on the guideline of the American College of Radiology and the previous research. The name of the patient, the gender, the body part, the type of examination, the time of examination and the conclusion, the name of the radiologist and the name of facility were well recorded in over 90% of the radiology reports. However, the identification number of the patient, the referring facility, the referring physician, the use of contrast material, the clinical information, the time of dictation, the signature of the radiologist and the license number of the radiologist were poorly recorded (less than 50%). The optimal format of a radiology report should be established for reliable and valid communication with clinicians

  18. Chromosomal localization of the genes encoding the kinetochore proteins CENPE and DENPF to human chromosomes 4q24{r_arrow}q25 and 1q32{r_arrow}q41, respectively, by fluorescence in situ hybridization

    Energy Technology Data Exchange (ETDEWEB)

    Testa, J.R.; Zhou, J.Y.; Bell, D.W.; Yen, T.J. [Fox Chase Cancer Center, Philadelphia, PA (United States)

    1994-10-01

    CENPE and CENPF are human kinetochore proteins of 312 and {approximately}400 kDa, respectively. As part of an effort to characterize the functions of these two proteins, we have used their respective cDNAs to map their human chromosomal locations by fluorescence in situ hybridization. The gene that encodes CENPE, a kinetochore-associated motor protein that is postulated to segregate chromosomes during mitosis, maps to chromosome 4q24{r_arrow}q25. The CENPF gene, which encodes a structural protein of the kinetochore, maps to chromosome 1q32{r_arrow}q41 within close proximity to the genetic locus that is linked to Van der Woude syndrome. 8 refs., 1 fig.

  19. 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.

  20. 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.}

  1. American Board of Radiology diagnostic radiology initial qualifying (written) examinations.

    Science.gov (United States)

    Yang, June C; Gerdeman, Anthony M; Becker, Gary J; Bosma, Jennifer L

    2010-07-01

    The purpose of this article is to inform radiology residents, program directors, and other interested parties of the processes involved in developing, administering, and scoring the American Board of Radiology (ABR) diagnostic radiology qualifying (written) examinations. The residents, once certified, will have a lifelong professional relationship with the ABR. It is important for the ABR to be transparent about the processes it uses to ensure that its examinations are fair, valid, and reliable so that residents and their program directors have accurate information about these high-stakes examinations.

  2. 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}

  3. Amplitude analysis of the {bar {ital N}}{ital N}{r_arrow}{pi}{sup {minus}}{pi}{sup +} reaction

    Energy Technology Data Exchange (ETDEWEB)

    Kloet, W.M. [Department of Physics and Astronomy, Rutgers University, Piscataway, New Jersey 08855 (United States); Myhrer, F. [Department of Physics and Astronomy, University of South Carolina, Columbia, South Carolina 29208 (United States)]|[NORDITA, Blegdamsvej 17, DK-2100 Copenhagen O/ (Denmark)

    1996-06-01

    A simple partial wave amplitude analysis of {bar {ital p}}{ital p}{r_arrow}{pi}{sup {minus}}{pi}{sup +} has been performed for data in the range {ital p}{sub lab}= 360{endash}1000 MeV/{ital c}, where remarkably few partial waves are required to fit the data. Furthermore, the number of required {ital J} values does not change in this energy range. However, the resulting set of partial wave amplitudes is not unique. We discuss possible measurements with polarized beam and target which will severely restrict and help resolve the present analysis ambiguities. New data from the reaction {bar {ital p}}{ital p}{r_arrow}{pi}{sup 0}{pi}{sup 0} alone are insufficient for that purpose. {copyright} {ital 1996 The American Physical Society.}

  4. The Cranked Arrow Wing Aerodynamics Project (CAWAP) and its Extension to the International Community as CAWAPI: Objectives and Overview

    Science.gov (United States)

    Lamar, John E.; Obara, Clifford J.

    2009-01-01

    This paper provides a brief history of the F-16XL-1 aircraft, its role in the High Speed Research (HSR) program and how it was morphed into the Cranked Arrow Wing Aerodynamics Project (CAWAP). Various flight, wind-tunnel and Computational Fluid Dynamics (CFD) data sets were generated during the CAWAP. These unique and open flight datasets for surface pressures, boundary-layer profiles and skin-friction distributions, along with surface flow data, are described and sample data comparisons given. This is followed by a description of how the project became internationalized to be known as Cranked Arrow Wing Aerodynamics Project International (CAWAPI) and is concluded by an introduction to the results of a 5-year CFD predictive study of data.

  5. Modified zeolitic imidazolate framework-8 as solid-phase microextraction Arrow coating for sampling of amines in wastewater and food samples followed by gas chromatography-mass spectrometry.

    Science.gov (United States)

    Lan, Hangzhen; Rönkkö, Tuukka; Parshintsev, Jevgeni; Hartonen, Kari; Gan, Ning; Sakeye, Motolani; Sarfraz, Jawad; Riekkola, Marja-Liisa

    2017-02-24

    In this study, a novel solid phase microextration (SPME) Arrow was prepared for the sampling of volatile low molecular weight alkylamines (trimethylamine (TMA) and triethylamine (TEA)) in wastewater, salmon and mushroom samples before gas chromatographic separation with mass spectrometer as detector. Acidified zeolitic imidazolate framework-8 (A-ZIF-8) was utilized as adsorbent and poly(vinyl chloride) (PVC) as the adhesive. The custom SPME Arrow was fabricated via a physical adhesion: (1) ZIF-8 particles were suspended in a mixture of tetrahydrofuran (THF) and PVC to form a homogeneous suspension, (2) a non-coated stainless steel SPME Arrow was dipped in the ZIF-8/PVC suspension for several times to obtain a uniform and thick coating, (3) the pore size of ZIF-8 was modified by headspace exposure to hydrochloric acid in order to increase the extraction efficiency for amines. The effect of ZIF-8 concentration in PVC solution, dipping cycles and aging temperature on extraction efficiency was investigated. In addition, sampling parameters such as NaCl concentration, sample volume, extraction time, potassium hydroxide concentration, desorption temperature and desorption time were optimized. The Arrow-to-Arrow reproducibilities (RSDs) for five ZIF-8 coated Arrows were 15.6% and 13.3% for TMA and TEA, respectively. The extraction with A-ZIF-8/PVC Arrow was highly reproducible for at least 130 cycles without noticeable decrease of performance (RSD<12.5%). Headspace SPME of 7.5mL sample solution with the fabricated ZIF-8 coated Arrow achieved linear ranges of 1-200ngmL(-1) for both TMA and TEA. The limit of quantitation (LOQ) was 1ngmL(-1) for both TMA and TEA. The method was successfully applied to the determination of TMA and TEA in wastewater, salmon and mushroom samples giving satisfactory selectivity towards the studied amines. Copyright © 2016 Elsevier B.V. All rights reserved.

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

    Science.gov (United States)

    Chaboo, Caroline S.; Biesele, Megan; Hitchcock, Robert K.; Weeks, Andrea

    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 indigenous groups using so-called ‘click languages’ in southern Africa. Beetles are used for arrow poison by at least eight San groups and one non-San group. Fieldwork and interviews with Ju|’hoan and Hai||om hunters in Namibia revealed major differences in the nature and preparation of arrow poisons, bow and arrow construction, and poison antidote. Ju|’hoan hunters use leaf-beetle larvae of Diamphidia Gerstaecker and Polyclada Chevrolat (Chrysomelidae: Galerucinae: Alticini) collected from soil around the host plants Commiphora africana (A. Rich.) Engl. and Commiphora angolensis Engl. (Burseracaeae). In the Nyae Nyae area of Namibia, Ju|’hoan hunters use larvae of Diamphidia nigroornata Ståhl. Larvae and adults live above-ground on the plants and eat leaves, but the San collect the underground cocoons to extract the mature larvae. Larval hemolymph is mixed with saliva and applied to arrows. Hai||om hunters boil the milky plant sap of Adenium bohemianum Schinz (Apocynaceae) to reduce it to a thick paste that is applied to their arrows. The socio-cultural, historical, and ecological contexts of the various San groups may determine differences in the sources and preparation of poisons, bow and arrow technology, hunting behaviors, poison potency, and perhaps antidotes. PMID:27006594

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

    Science.gov (United States)

    Chaboo, Caroline S; Biesele, Megan; Hitchcock, Robert K; Weeks, Andrea

    2016-01-01

    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 indigenous groups using so-called 'click languages' in southern Africa. Beetles are used for arrow poison by at least eight San groups and one non-San group. Fieldwork and interviews with Ju|'hoan and Hai||om hunters in Namibia revealed major differences in the nature and preparation of arrow poisons, bow and arrow construction, and poison antidote. Ju|'hoan hunters use leaf-beetle larvae of Diamphidia Gerstaecker and Polyclada Chevrolat (Chrysomelidae: Galerucinae: Alticini) collected from soil around the host plants Commiphora africana (A. Rich.) Engl. and Commiphora angolensis Engl. (Burseracaeae). In the Nyae Nyae area of Namibia, Ju|'hoan hunters use larvae of Diamphidia nigroornata Ståhl. Larvae and adults live above-ground on the plants and eat leaves, but the San collect the underground cocoons to extract the mature larvae. Larval hemolymph is mixed with saliva and applied to arrows. Hai||om hunters boil the milky plant sap of Adenium bohemianum Schinz (Apocynaceae) to reduce it to a thick paste that is applied to their arrows. The socio-cultural, historical, and ecological contexts of the various San groups may determine differences in the sources and preparation of poisons, bow and arrow technology, hunting behaviors, poison potency, and perhaps antidotes.

  8. A decision framework for a farmer who is risk averse in the Arrow-Pratt sense and downside risk averse

    OpenAIRE

    Donoso, Guillermo

    2014-01-01

    This study provides a decision framework to analyze optimal production diversification decisions under uncertainty for a farmer who is risk averse in the Arrow-Pratt sense and downside risk averse. The decision model accounts for the third central moment of the joint distribution of portfolio returns. This is relevant for asymmetrical return distributions. This general model contains the classical decision model as a special case. The benefit of the proposed generalization is that each compet...

  9. The Universal Arrow of Time III-IV:(Part III) Nonquantum gravitation theory (Part IV) Quantum gravitation theory

    OpenAIRE

    Kupervasser, Oleg

    2011-01-01

    The paper consists of the two independent papers - the first one about Nonquantum Gravitation theory, the second one about Quantum Gravitation theory (Part III: Nonquantum Gravitation theory) The first paper is dealing with the analysis of general relativity theory (theory of gravitation) from the point of view of thermodynamic time arrow. Within this framework "informational paradox" for black holes and "paradox with the grandfather" for time travel "wormholes" are resolved. (Part IV: Quantu...

  10. Radiology in dentistry. Zahnaerztliche Radiologie

    Energy Technology Data Exchange (ETDEWEB)

    Pasler, F.A.

    1981-01-01

    Dental radiology as a special field with all the necessary basic knowledge is slowly gaining the importance it deserves within the dental medicine and as one of the branches of human medicine. The author makes an attempt to find a way to combine the medical knowledge with the knowledge in the field of dental radiology, to compile the basic knowledge in the sense of a dento-maxillo-fascial radiology without letting the ideas of any of the branches get too dominant. The using of special literature remains necessary despite the creation of this booklet.

  11. La génesis de la Economía de la Salud en Kenneth Arrow (1963

    Directory of Open Access Journals (Sweden)

    Jairo Humberto Restrepo Zea

    2016-01-01

    Full Text Available Kenneth J. Arrow es uno de los economistas más destacados del siglo XX. Sus preocupaciones sobre el equilibrio competitivo y la optimalidad bajo condiciones de incertidumbre lo llevaron a publicar en 1963 el artículo “Uncertainty and the welfare economics of medical care”, reconocido como la génesis de la Economía de la Salud. En este ensayo se rinde un homenaje a esta obra, develando el plan intelectual para el análisis de bienestar de las prestaciones médicas, discutiendo la vigencia de los planteamientos originales y destacando sus principales implicaciones en cuanto a los temas objeto de análisis y discusión. La tesis central de Arrow sobre la imposibilidad del mercado para alcanzar una asignación eficiente sigue vigente debido, especialmente, a la incertidumbre respecto a la incidencia de enfermedades. Además del debate sobre Estado-mercado, a partir de Arrow se discuten las implicaciones de asuntos como la información asimétrica, el riesgo moral y las normas sociales.

  12. 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}

  13. 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.

  14. 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.

  15. Radiological design guide

    Energy Technology Data Exchange (ETDEWEB)

    Evans, R.A.

    1994-08-16

    The purpose of this design guide is to provide radiological safety requirements, standards, and information necessary for designing facilities that will operate without unacceptable risk to personnel, the public, or the environment as required by the US Department of Energy (DOE). This design guide, together with WHC-CM-4-29, Nuclear Criticality Safety, WHC-CM-4-46, Nonreactor Facility Safety Analysis, and WHC-CM-7-5, Environmental Compliance, covers the radiation safety design requirements at Westinghouse Hanford Company (WHC). This design guide applies to the design of all new facilities. The WHC organization with line responsibility for design shall determine to what extent this design guide shall apply to the modifications to existing facilities. In making this determination, consideration shall include a cost versus benefit study. Specifically, facilities that store, handle, or process radioactive materials will be covered. This design guide replaces WHC-CM-4-9 and is designated a living document. This design guide is intended for design purposes only. Design criteria are different from operational criteria and often more stringent. Criteria that might be acceptable for operations might not be adequate for design.

  16. Granulomatous mastitis: radiological findings

    Energy Technology Data Exchange (ETDEWEB)

    Ozturk, M.; Mavili, E.; Kahriman, G.; Akcan, A.C.; Ozturk, F. [Depts. of Radiology, Surgery, and Pathology, Erciyes Univ. Medical Faculty, Kayseri (Turkey)

    2007-02-15

    Purpose: To evaluate the radiological, ultrasonographic, and magnetic resonance imaging (MRI) findings of idiopathic granulomatous mastitis. Material and Methods: Between April 2002 and June 2005, the mammography, ultrasound, color Doppler ultrasound, non enhanced MR, and dynamic MR findings of nine patients with the preliminary clinical diagnosis of malignancy and the final diagnosis of granulomatous mastitis were evaluated. Results: On mammography, asymmetrical focal densities with no distinct margins, ill-defined masses with spiculated contours, and bilateral multiple ill-defined nodules were seen. On ultrasound, in four patients a discrete, heterogenous hypoechoic mass, in two patients multiple abscesses, in one patient bilateral multiple central hypo peripheral hyperechoic lesions, in two patients heterogeneous hypo- and hyperechoic areas together with parenchymal distortion, and in one patient irregular hypoechoic masses with tubular extensions and abscess cavities were seen. Five of the lesions were vascular on color Doppler ultrasound. On MR mammography, the most frequent finding was focal or diffuse asymmetrical signal intensity changes that were hypointense on T1W images and hyperintense on T2W images, without significant mass effect. Nodular lesions were also seen. On dynamic contrast-enhanced mammography, mass-like enhancement, ring-like enhancement, and nodular enhancement were seen. The time-intensity curves differed from patient to patient and from lesion to lesion. Conclusion: The imaging findings of idiopathic granulomatous mastitis have a wide spectrum, and they are inconclusive for differentiating malignant and benign lesions.

  17. Information entropy exchange between a particle and an observer and the arrow of time

    Science.gov (United States)

    Petridis, Athansios; Deeter, Daniel

    2017-09-01

    The quantum mechanical transition amplitude for a free particle is calculated using the path integral formalism. This amplitude is the kernel of the Schrödinger equation. A Wick rotation of the time increment transforms the kernel into a partition function that depends on the space and time intervals of the transition, with the temperature being the inverse of the time increment. The information entropy exchange between the system and the observer during the transition is calculated from the partition function. The requirement that this be real-valued leads to uncertainty-type relations. Furthermore, the transition exhibits positive information entropy exchange for small time intervals. Coordinate-time reversal maintains the sign of the information entropy exchange, therefore, producing an arrow of time. The related statistical weight is inversely proportional to the square root of the time interval and can be interpreted based on simple statistical rules. In the way the fundamental equations of quantum mechanics can be derived from a postulate on information entropy exchange.

  18. Observation of the weak time’s arrow in B mesons

    CERN Multimedia

    CERN. Geneva

    2012-01-01

    The mechanism of CP violation in weak interactions, as arising from the single physical phase in the CKM matrix, has been validated by more than a decade of intense experimental work probing CP violation, particularly with studies with B mesons. Since the Standard Model theory is CPT invariant, it predicts a “weak arrow of time” matching the large observed matter-antimatter asymmetry in B mesons. However, until recently there has been no direct observation of the expected, large time reversal (T) asymmetry. In this seminar we shall discuss how the BABAR experiment at SLAC has conducted a new data analysis where the decays of entangled neutral B mesons allow comparisons between the rates of four different transitions and their inverse, as a function of the time evolution of the B meson. The results lead to the first high significance, direct observation of T non-invariance through the exchange of initial and final states in transitions that can only be connected by a T symmetry transformation.

  19. 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.

  20. 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,...

  1. A review of pediatric radiology

    National Research Council Canada - National Science Library

    Sabbadini, Gary D

    2013-01-01

    .... The goal of this article is to review some basic concepts in pediatric radiology to help general practitioners have a better understanding of when to take radiographs on children, which radiographs...

  2. 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...

  3. 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.

  4. 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.

  5. 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.

  6. 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.

  7. 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.

  8. Radiologic analysis of amebiasis

    Energy Technology Data Exchange (ETDEWEB)

    Kim, S. Y.; Lee, Y. H.; Park, C. Y. [Yonsei University College of Medicine, Seoul (Korea, Republic of)

    1980-06-15

    The amebiasis is a common diseases in Korea as well as worldwide especially frequent in tropical area such as India, Africa and South America. The diagnosis of amebiasis remain difficult and complex, despite of many diagnostic method, for example, direct stool test for ameba, many immunologic studies and biopsy. Authors analyzed radiologically the patient who have had confirmed as a amebiasis from June, 1976 to September, 1979 at Yonsei University, College of Medicine, Severance Hospital. The results as follows: 1. The amebic liver abscess was a most common from of the amebiasis in Korea, which were 40 cases among 56 cases. Plain abdomen showed huge hepatomegaly, compression and displacement in hepatic flexure of colon, and reflex gas distension in almost cases. Chest P-A showed nonspecific right lower lung findings from secondary to right upper abdominal pathology, such as elevated right diaphragm (61.3%), pleural effusion (60.0%), right lower lung consolidation (37.5%) and abscess cavities (5.0%). Liver scan showed large space occupying lesion, most commonly situated in right lobe of liver (68.6%). 2. Among total 15 cases of the amebic colitis, positive findings on barium enema were 80%. Barium enama showed spas and irritability (89.2%), narrowing of lumen and lack of distensibility (71.4%) and deformity of cecum (20.0%). Involved site was cecum, ascending colon, rectosigmoid, transeverse and descending colon in order of frequency. Unusual involvement of terminal ileum was 2 cases. 3. Combined cases of amebic liver abscess and colitis were 4 cases (27.7%)

  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. Renormalizations in softly broken N = 1 theories: Slavnov-Taylor identities

    Science.gov (United States)

    Kondrashuk, Igor

    2000-09-01

    Slavnov-Taylor identities have been applied to perform explicitly the renormalization procedure for the softly broken N = 1 SYM. The result is in accordance with the previous results obtained at the level of the supergraph technique.

  11. Renormalizations in softly broken N=1 theories: Slavnov-Taylor identities

    OpenAIRE

    Kondrashuk, Igor

    2000-01-01

    Slavnov-Taylor identities have been applied to perform explicitly the renormalization procedure for the softly broken N=1 SYM. The result is in accordance with the previous results obtained at the level of supergraph technique.

  12. Renormalizations in softly broken N=1 theories: Slavnov-Taylor identities

    Energy Technology Data Exchange (ETDEWEB)

    Kondrashuk, Igor [SISSA-ISAS and INFN, Sezione di Trieste, Trieste (Italy)]. E-mail: ikond@sissa.it

    2000-09-15

    Slavnov-Taylor identities have been applied to perform explicitly the renormalization procedure for the softly broken N=1 SYM. The result is in accordance with the previous results obtained at the level of the supergraph technique. (author)

  13. 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.

  14. On the covariant description of spontaneously broken symmetry in general field theory

    CERN Document Server

    Joos, H

    1976-01-01

    Reducible fields A(x) with degenerate vacuum which allow the unitary- symmetry transformation U/sup -1/(c)A(x)U(c)=A(x)+c are analysed. The mathematical properties of the 'charge integral' related to the conserved current of this spontaneously broken symmetry are described. The structure of the S-matrix theory is discussed in such a generalized field theory as a guide-line for the treatment of more complex examples of spontaneously broken symmetries. (42 refs).

  15. 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.

  16. 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.

  17. Experimental Investigation of a Point Design Optimized Arrow Wing HSCT Configuration

    Science.gov (United States)

    Narducci, Robert P.; Sundaram, P.; Agrawal, Shreekant; Cheung, S.; Arslan, A. E.; Martin, G. L.

    1999-01-01

    The M2.4-7A Arrow Wing HSCT configuration was optimized for straight and level cruise at a Mach number of 2.4 and a lift coefficient of 0.10. A quasi-Newton optimization scheme maximized the lift-to-drag ratio (by minimizing drag-to-lift) using Euler solutions from FL067 to estimate the lift and drag forces. A 1.675% wind-tunnel model of the Opt5 HSCT configuration was built to validate the design methodology. Experimental data gathered at the NASA Langley Unitary Plan Wind Tunnel (UPWT) section #2 facility verified CFL3D Euler and Navier-Stokes predictions of the Opt5 performance at the design point. In turn, CFL3D confirmed the improvement in the lift-to-drag ratio obtained during the optimization, thus validating the design procedure. A data base at off-design conditions was obtained during three wind-tunnel tests. The entry into NASA Langley UPWT section #2 obtained data at a free stream Mach number, M(sub infinity), of 2.55 as well as the design Mach number, M(sub infinity)=2.4. Data from a Mach number range of 1.8 to 2.4 was taken at UPWT section #1. Transonic and low supersonic Mach numbers, M(sub infinity)=0.6 to 1.2, was gathered at the NASA Langley 16 ft. Transonic Wind Tunnel (TWT). In addition to good agreement between CFD and experimental data, highlights from the wind-tunnel tests include a trip dot study suggesting a linear relationship between trip dot drag and Mach number, an aeroelastic study that measured the outboard wing deflection and twist, and a flap scheduling study that identifies the possibility of only one leading-edge and trailing-edge flap setting for transonic cruise and another for low supersonic acceleration.

  18. Box-and-arrow explanations need not be more abstract than neuroscientific mechanism descriptions

    Directory of Open Access Journals (Sweden)

    Edoardo eDatteri

    2014-05-01

    Full Text Available The nature of the relationship between box-and-arrow (BA explanations and neuroscientific mechanism descriptions (NMDs is a key foundational issue for cognitive science. In this article we attempt to identify the nature of the constraints imposed by BA explanations on the formulation of NMDs. On the basis of a case study about motor control, we argue that BA explanations and NMDs both identify regularities that hold in the system, and that these regularities place constraints on the formulation of NMDs from BA analyses, and vice versa. The regularities identified in the two kinds of explanation play a crucial role in reasoning about the relationship between them, and in justifying the use of neuroscientific experimental techniques for the empirical testing of BA analyses of behavior. In addition, we make claims concerning the similarities and differences between BA analyses and NMDs. First, we argue that both types of explanation describe mechanisms. Second, we propose that they differ in terms of the theoretical vocabulary used to denote the entities and properties involved in the mechanism and engaging in regular, mutual interactions. On the contrary, the notion of abstractness, defined as omission of detail, does not help to distinguish BA analyses from NMDs: there is a sense in which BA analyses are more detailed than NMDs. In relation to this, we also focus on the nature of the extra detail included in NMDs and missing from BA analyses, arguing that such detail does not always concern how the system works. Finally, we propose reasons for doubting that BA analyses, unlike NMDs, may be considered mechanism sketches. We have developed these views by critically analyzing recent claims in the philosophical literature regarding the foundations of cognitive science.

  19. Box-and-arrow explanations need not be more abstract than neuroscientific mechanism descriptions.

    Science.gov (United States)

    Datteri, Edoardo; Laudisa, Federico

    2014-01-01

    The nature of the relationship between box-and-arrow (BA) explanations and neuroscientific mechanism descriptions (NMDs) is a key foundational issue for cognitive science. In this article we attempt to identify the nature of the constraints imposed by BA explanations on the formulation of NMDs. On the basis of a case study about motor control, we argue that BA explanations and NMDs both identify regularities that hold in the system, and that these regularities place constraints on the formulation of NMDs from BA analyses, and vice versa. The regularities identified in the two kinds of explanation play a crucial role in reasoning about the relationship between them, and in justifying the use of neuroscientific experimental techniques for the empirical testing of BA analyses of behavior. In addition, we make claims concerning the similarities and differences between BA analyses and NMDs. First, we argue that both types of explanation describe mechanisms. Second, we propose that they differ in terms of the theoretical vocabulary used to denote the entities and properties involved in the mechanism and engaging in regular, mutual interactions. On the contrary, the notion of abstractness, defined as omission of detail, does not help to distinguish BA analyses from NMDs: there is a sense in which BA analyses are more detailed than NMDs. In relation to this, we also focus on the nature of the extra detail included in NMDs and missing from BA analyses, arguing that such detail does not always concern how the system works. Finally, we propose reasons for doubting that BA analyses, unlike NMDs, may be considered "mechanism sketches." We have developed these views by critically analyzing recent claims in the philosophical literature regarding the foundations of cognitive science.

  20. Radiological findings in NAO syndrome

    Energy Technology Data Exchange (ETDEWEB)

    Al-Otaibi, Leftan; Hugosson, Claes O. [Department of Radiology, King Faisal Specialist Hospital and Research Center, Riyadh (Saudi Arabia); Al-Mayouf, Sulalman M.; Majeed, Mahmoud; Al-Eid, Wea' am; Bahabri, Sultan [Department of Paediatrics, King Faisal Specialist Hospital and Research Center, Riyadh (Saudi Arabia)

    2002-07-01

    Background: Diseases exhibiting osteolysis in children are rare hereditary conditions. Several types have been recognised with different clinical manifestations. One type includes subcutaneous nodules, arthropathy and osteolysis and has been termed NAO syndrome. Previous radiological reports have described the affected bones, usually the carpal and tarsal regions, but a detailed analysis of the radiological findings of both the axial as well as the appendicular skeleton has not been reported. Objectives: To describe the radiological findings in a large group of children with an autosomal recessive disease characterized by nodules, familial arthropathy and osteolysis. Materials and methods: The study comprises 14 patients from 9 families and all patients had the triad of nodulosis, arthropathy and osteolysis (NAO). Results: The most common radiological manifestations were osteopenia, undertubulation of long bones, arthritic changes, sclerotic sutures of the calvaria, osteolysis and muscle contractures. Other common findings were squared vertebrae, broad medial clavicles and brachycephaly. Progress of disease was documented in more than half of the patients. Conclusions: Our study is the first report of the detailed radiological findings of NAO syndrome. In NAO syndrome, both the axial and appendicular skeleton are involved (orig.)

  1. Workflow management systems in radiology

    Science.gov (United States)

    Wendler, Thomas; Meetz, Kirsten; Schmidt, Joachim

    1998-07-01

    In a situation of shrinking health care budgets, increasing cost pressure and growing demands to increase the efficiency and the quality of medical services, health care enterprises are forced to optimize or complete re-design their processes. Although information technology is agreed to potentially contribute to cost reduction and efficiency improvement, the real success factors are the re-definition and automation of processes: Business Process Re-engineering and Workflow Management. In this paper we discuss architectures for the use of workflow management systems in radiology. We propose to move forward from information systems in radiology (RIS, PACS) to Radiology Management Systems, in which workflow functionality (process definitions and process automation) is implemented through autonomous workflow management systems (WfMS). In a workflow oriented architecture, an autonomous workflow enactment service communicates with workflow client applications via standardized interfaces. In this paper, we discuss the need for and the benefits of such an approach. The separation of workflow management system and application systems is emphasized, and the consequences that arise for the architecture of workflow oriented information systems. This includes an appropriate workflow terminology, and the definition of standard interfaces for workflow aware application systems. Workflow studies in various institutions have shown that most of the processes in radiology are well structured and suited for a workflow management approach. Numerous commercially available Workflow Management Systems (WfMS) were investigated, and some of them, which are process- oriented and application independent, appear suitable for use in radiology.

  2. White Paper: Curriculum in Interventional Radiology.

    Science.gov (United States)

    Mahnken, Andreas H; Bücker, Arno; Hohl, Christian; Berlis, Ansgar

    2017-04-01

    Purpose Scope and clinical importance of interventional radiology markedly evolved over the last decades. Consequently it was acknowledged as independent subspecialty by the "European Union of Medical Specialists" (UEMS). Based on radiological imaging techniques Interventional Radiology is an integral part of Radiology. Materials und Methods In 2009 the German Society for Interventional Radiology and minimally-invasive therapy (DeGIR) developed a structured training in Interventional Radiology. In cooperation with the German Society of Neuroradiology (DGNR) this training was extended to also cover Interventional Neuroradiology in 2012. Tailored for this training in Interventional Radiology a structured curriculum was developed, covering the scope of this modular training. Results The curriculum is based on the DeGIR/DGNR modular training concept in Interventional Radiology. There is also an European Curriculum and Syllabus for Interventional Radiology developed by the "Cardiovascular and Interventional Radiological Society of Europe" (CIRSE). The presented curriculum in Interventional Radiology is designed to provide a uniform base for the training in Interventional Radiology in Germany, based on the competencies obtained during residency. Conclusion This curriculum can be used as a basis for training in Interventional Radiology by all training sites. Key Points: · Interventional Radiology is an integral part of clinical radiology. · The German Society for Interventional Radiology and minimally-invasive therapy (DeGIR) developed a curriculum in Interventional Radiology. · This curriculum is an integrative basis for the training in interventional. Citation Format · Mahnken AH, Bücker A, Hohl C et al. White Paper: Curriculum in Interventional Radiology. Fortschr Röntgenstr 2017; 189: 309 - 311. © Georg Thieme Verlag KG Stuttgart · New York.

  3. ["Activity based costing" in radiology].

    Science.gov (United States)

    Klose, K J; Böttcher, J

    2002-05-01

    The introduction of diagnosis related groups for reimbursement of hospital services in Germany (g-drg) demands for a reconsideration of utilization of radiological products and costs related to them. Traditional cost accounting as approach to internal, department related budgets are compared with the accounting method of activity based costing (ABC). The steps, which are necessary to implement ABC in radiology are developed. The introduction of a process-oriented cost analysis is feasible for radiology departments. ABC plays a central role in the set-up of decentralized controlling functions within this institutions. The implementation seems to be a strategic challenge for department managers to get more appropriate data for adequate enterprise decisions. The necessary steps of process analysis can be used for other purposes (Certification, digital migration) as well.

  4. 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.

  5. Is the pull-out force of the Meniscus Arrow in bone affected by the inward curling of the barbs during biodegradation? An in vitro study.

    Science.gov (United States)

    Wouters, Diederick B; Burgerhof, Johannes G M; de Hosson, Jeff T M; Bos, Rudolf R M

    2009-04-01

    Inward curling of the barbs of Meniscus Arrows during degradation was observed in a previous study, in which swelling, distention, and water uptake by Meniscus Arrows was evaluated. This change of configuration could have consequences with respect to anchorage capacity in bone. Eight non-degraded Meniscus Arrows in the original configuration were pulled out of thawed, fresh-frozen human femoral condyle, and pull-out force was measured and compared with that of 6 Meniscus Arrows after 31 days of degradation under controlled conditions. No significant difference was found between the 2 groups with respect to the required pull-out force (t test), the distribution of the data, or the interaction between degradation and location, as evaluated by Mann-Whitney test, and no significant difference was found between the 2 groups with respect to the degradation state or position in the condyles, as evaluated by 2-way analysis of variance. Our results indicate that the decrease in barb-barb diameter during the first month of degradation of the Meniscus Arrows has no significant effect on the tensile pull-out force required for removal from human femur condyle. Further research should be undertaken to examine whether the same is true for other biodegradable devices with barbs.

  6. Teaching physics to radiology residents.

    Science.gov (United States)

    Hendee, William R

    2009-04-01

    The complexity of diagnostic imaging has expanded dramatically over the past two decades. Over the same period, the time and effort devoted to teaching physics (the science and technology of the discipline) have diminished. This paradox compromises the ability of future radiologists to master imaging technologies so that they are used in an efficient, safe, and cost-effective manner. This article addresses these issues. Efforts involving many professional organizations are under way to resolve the paradox of the expanding complexity of medical imaging contrasted with the declining emphasis on physics in radiology residency programs. These efforts should help to reestablish physics education as a core value in radiology residency programs.

  7. 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.

  8. Paediatric interventional radiology | Chaudry | SA Journal of Radiology

    African Journals Online (AJOL)

    Paediatric interventional radiology (IR) is a rapidly developing subspecialty, seeking to meet the increasing demand for image-guided minimally invasive procedures. The wide range of procedures performed and the conditions treated reflect the varying ages and complexity of the patient population. This article reviews the ...

  9. Radiology in Medical Education: A Pediatric Radiology Elective as a Template for Other Radiology Courses.

    Science.gov (United States)

    Hilmes, Melissa A; Hyatt, Eddie; Penrod, Cody H; Fleming, Amy E; Singh, Sudha P

    2016-03-01

    Traditionally, the pediatric radiology elective for medical students and pediatric residents constituted a morning teaching session focused mainly on radiography and fluoroscopy. A more structured elective was desired to broaden the exposure to more imaging modalities, create a more uniform educational experience, and include assessment tools. In 2012, an introductory e-mail and formal syllabus, including required reading assignments, were sent to participants before the start date. A rotating weekly schedule was expanded to include cross-sectional imaging (ultrasound, CT, MR) and nuclear medicine. The schedule could accommodate specific goals of the pediatric resident or medical student, as requested. Starting in 2013, an online pre-test and post-test were developed, as well as an online end-of-rotation survey specific to the pediatric radiology elective. Taking the Image Gently pledge was required. A scavenger hunt tool, cue cards, and electronic modules were added. Pre-test and post-test scores, averaged over 2 years, showed improvement in radiology knowledge, with scores increasing by 27% for medical students and 21% for pediatric residents. Surveys at the end of the elective were overwhelmingly positive, with constructive criticism and complimentary comments. We have successfully created an elective experience in radiology that dedicates time to education while preserving the workflow of radiologists. We have developed tools to provide a customized experience with many self-directed learning opportunities. Our tools and techniques are easily translatable to a general or adult radiology elective. Copyright © 2016 American College of Radiology. Published by Elsevier Inc. All rights reserved.

  10. From arrow poison to herbal medicine--the ethnobotanical, phytochemical and pharmacological significance of Cissampelos (Menispermaceae).

    Science.gov (United States)

    Semwal, Deepak Kumar; Semwal, Ruchi Badoni; Vermaak, Ilze; Viljoen, Alvaro

    2014-09-11

    Cissampelos species have a rich history of traditional use, being used for both therapeutic and toxic properties. It is traditionally applied therapeutically in a diverse range of conditions and diseases including asthma, cough, fever, arthritis, obesity, dysentery, snakebite, jaundice and heart, blood pressure and skin-related problems. Conversely, it was traditionally included in preparations of curare applied as arrow poison during hunting to cause death of animals by asphyxiation. This review unites the ethnobotanical knowledge on Cissampelos with the phytochemistry and pharmacological activity which has been explored thus far. In addition, it identifies knowledge gaps and suggests further research opportunities. The available electronic literature on the genus Cissampelos was collected using database searches including Scopus, Google Scholar, Pubmed, Web of Science, etc. The searches were limited to peer-reviewed English journals with the exception of books and a few articles in foreign languages which were included. The literature revealed that pharmacological activity including analgesic and antipyretic, anti-inflammatory, anti-allergic, bronchodilator, immunomodulatory, memory-enhancing, antidepressant, neuroprotective, antimicrobial, antimalarial, antiparasitic, anti-ulcer, anticancer, anti-oxidant, cardiovascular, muscle-relaxant, hepatoprotective, antidiabetic, antidiarrhoeal, antifertility, and antivenom activity have been confirmed in vitro and/or in vivo for various Cissampelos species. Cissampelos pareira L. and Cissampelos sympodialis Eichl. are the most explored species of this genus and the smallest number of studies have been conducted on Cissampelos laxiflora Moldenke and Cissampelos tenuipes Engl. Many alkaloids isolated from Cissampelos such as warifteine, methylwarifteine, berberine, hayatin and hayatidin showed promising anti-allergic, immunosuppressive, antidepressant, anticancer, vasodilatory and muscle-relaxant activities. The plants of

  11. 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.

  12. West African Journal of Radiology: Journal Sponsorship

    African Journals Online (AJOL)

    West African Journal of Radiology: Journal Sponsorship. Journal Home > About the Journal > West African Journal of Radiology: Journal Sponsorship. Log in or Register to get access to full text downloads.

  13. Applications of decision analysis in diagnostic radiology

    NARCIS (Netherlands)

    M.G.M. Hunink (Myriam)

    1989-01-01

    textabstractThe subjects of this thesis are decision analysis and receiver operating characteristic (ROC) methodology applied to radiological problems. This thesis is intended for those interested in applying decision analytical techniques in diagnostic radiology, and in medicine in

  14. How to Read Your Radiology Report

    Science.gov (United States)

    ... Index A-Z How to Read Your Radiology Report Imaging studies such as magnetic resonance imaging (MRI), ... report. top of page Sections of the Radiology Report Type of exam The type of exam section ...

  15. Radiology in the management of pleural disease

    Energy Technology Data Exchange (ETDEWEB)

    Patel, M.C.; Flower, C.D.R. [Department of Radiology, Addenbrookes Hospital, Hills Road, Cambridge CB 2 2QQ (United Kingdom)

    1997-12-01

    This is a review of the role of radiological intervention in the pleural space. It discusses the radiological management of effusions, empyemas (including the use of fibrinolytic agents), pneumothoraces and pleural thickening. (orig.) With 10 figs., 101 refs.

  16. West African Journal of Radiology

    African Journals Online (AJOL)

    The West African Journal of Radiology is an annual publication and the official organ of the Association of Radiologists of West Africa. ... clinical case reports, discoveries and engineering design/fabrication reports related to any branch of imaging modalities, Radiotherapy and allied subjects. ... Table of Contents. Articles ...

  17. Radiological evaluation of retrocaval ureter

    Energy Technology Data Exchange (ETDEWEB)

    Imai, Yutaka; Sone, Shusuke; Watanabe, Toshikazu; Okazaki, Yoichi; Yamashita, Kunihiko; Yamaguchi, Kenji; Oguchi, Masahiko; Wako, Tadashi.

    1988-06-01

    Radiological findings of three cases with retrocaval ureter are reviewed. CT images provide a precise anatomical interrelations between the right ureter and the vena cava or psoas muscle. CT scans performed following intravenous pyelography add a confirmative information to make a diagnosis of retrocaval ureter.

  18. Suspected clinical-radiological discord

    African Journals Online (AJOL)

    Abstract. 17-year male student presented with vague constitutional symptoms and jaundice. His clinical chest findings initially suggested a discord with radiological findings. It turned out that the patient had a rare congenital disorder in addition to a seemingly common condition that brought him to the hospital. The purpose ...

  19. 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.

  20. Barcoding of arrow worms (Phylum Chaetognatha) from three oceans: genetic diversity and evolution within an enigmatic phylum.

    Science.gov (United States)

    Jennings, Robert M; Bucklin, Ann; Pierrot-Bults, Annelies

    2010-04-01

    Arrow worms (Phylum Chaetognatha) are abundant planktonic organisms and important predators in many food webs; yet, the classification and evolutionary relationships among chaetognath species remain poorly understood. A seemingly simple body plan is underlain by subtle variation in morphological details, obscuring the affinities of species within the phylum. Many species achieve near global distributions, spanning the same latitudinal bands in all ocean basins, while others present disjunct ranges, in some cases with the same species apparently found at both poles. To better understand how these complex evolutionary and geographic variables are reflected in the species makeup of chaetognaths, we analyze DNA barcodes of the mitochondrial cytochrome oxidase c subunit I (COI) gene, from 52 specimens of 14 species of chaetognaths collected mainly from the Atlantic Ocean. Barcoding analysis was highly successful at discriminating described species of chaetognaths across the phylum, and revealed little geographical structure. This barcode analysis reveals hitherto unseen genetic variation among species of arrow worms, and provides insight into some species relationships of this enigmatic group.

  1. Barcoding of arrow worms (Phylum Chaetognatha from three oceans: genetic diversity and evolution within an enigmatic phylum.

    Directory of Open Access Journals (Sweden)

    Robert M Jennings

    Full Text Available Arrow worms (Phylum Chaetognatha are abundant planktonic organisms and important predators in many food webs; yet, the classification and evolutionary relationships among chaetognath species remain poorly understood. A seemingly simple body plan is underlain by subtle variation in morphological details, obscuring the affinities of species within the phylum. Many species achieve near global distributions, spanning the same latitudinal bands in all ocean basins, while others present disjunct ranges, in some cases with the same species apparently found at both poles. To better understand how these complex evolutionary and geographic variables are reflected in the species makeup of chaetognaths, we analyze DNA barcodes of the mitochondrial cytochrome oxidase c subunit I (COI gene, from 52 specimens of 14 species of chaetognaths collected mainly from the Atlantic Ocean. Barcoding analysis was highly successful at discriminating described species of chaetognaths across the phylum, and revealed little geographical structure. This barcode analysis reveals hitherto unseen genetic variation among species of arrow worms, and provides insight into some species relationships of this enigmatic group.

  2. Lexical study of the bow and arrow game vocabulary and the Parkatêjê log race

    Directory of Open Access Journals (Sweden)

    Marília de Nazaré de Oliveira Ferreira

    2017-09-01

    Full Text Available The work aims to provide subsidies for the documentation and analysis of the Parkatêjê language through the study of the lexicon of two traditional activities of the Parkatêjê people: the log race and the arrow game. For this, we set two lexical fields, log race and bow and arrow game, which were divided into five semantic fields: physical space; steps and processes; human elements; parts, components, specifications, measurements and instruments. Data collection was carried out in situ by applying linguistic questionnaires to informants of three age groups as the stratification made by Ferreira (2005. The development of this research was based on the theoretical postulations from the ethnolinguistics of Coșeriu (1990, Velarde (1991 and Rodrigues (2005, the Lexicology and lexicography (Biderman (2001 and Dubois et al. (1973; and the Lexical field theory from Coșeriu (1977, Abbade (2011 and Dubois et al. (1973. At the end of the study we achieve the structure and organization of the vocabulary that we propose to investigate, as well linguist peculiarities of the lexicon.

  3. Development, integration, testing, and evaluation of the U.S. Army Buckeye System to the NAVAIR Arrow UAV

    Science.gov (United States)

    Fischer, Robert L.; Kennedy, Brian G.; Jones, Mitchell; Walker, Jeffrey; Muresan, Darian; Baxter, Gregory; Flood, Mark; Follmer, Brian; Sun, Xiuhong; Chen, William; Ruby, Jeffrey G.

    2008-04-01

    The Buckeye high-resolution geospatial collection system is currently supporting operations within both Iraq and Afghanistan. The Buckeye system, originally developed by the U.S. Army Corps of Engineers (USACE), Engineer Research and Development Center (ERDC), provides timely tactical high resolution geospatial information to field commanders. The Buckeye system is applicable in the following arenas: intelligence, surveillance, and reconnaissance (ISR), mapping, change detection, mission rehearsal, simulation, and battlefield visualization. Three distinct Buckeye systems hosted on multiple air platforms have provided continuous geospatial data delivery to U.S. Forces since November 2004. Further capability is to be provided by integrating next generation Buckeye components to an Unmanned Aerial Vehicle (UAV). The UAV selected for this effort is the experimental Arrow Unmanned Aerial System (UAS). This paper describes the physical and systems integration of the Buckeye Electro-Optical (EO) and Light Detection and Ranging (LIDAR) components to the Arrow platform. Engineering solutions for mass balancing, thermal dispersion, and component calibration are presented. The distributed on-board architecture which performs instrument control, image compression, and data downlink, is described and discussed. Finally theoretical, laboratory and flight testing results are presented with a discussion on implementation and data dissemination within a tactical environment.

  4. 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 be...

  5. The advanced eccentricity and broken cage diagnostic method for medium voltage induction motors

    Directory of Open Access Journals (Sweden)

    Janda Žarko

    2012-01-01

    Full Text Available In the paper the comparative diagnostics of medium voltage induction motors has been presented. The methods employed are the motor current signature analysis (MCSA and the axial leakage flux spectral analysis. All presented test procedures have been conducted on partially loaded motors, one without fault and the other with fault. Rated parameters of case study motors are 6 kV and 3.15 MW, and both motors are installed in one combined steam power plant. The reliable broken rotor bars detection and existence of static eccentricity have been demonstrated. The new method for combined fault detection has also been announced. The combined fault under scope is the simultaneous existence of broken rotor bars and static eccentricity. The proposed combined fault detection method is based upon axial leakage flux spectral analysis, especially in the vicinity of the double fundamental frequency. The existence of three broken rotor bars has been confirmed after physical rotor cage examination.

  6. Algorithm for detection of the broken phase conductor in the radial networks

    Directory of Open Access Journals (Sweden)

    Ostojić Mladen M.

    2016-01-01

    Full Text Available The paper presents an algorithm for a directional relay to be used for a detection of the broken phase conductor in the radial networks. The algorithm would use synchronized voltages, measured at the beginning and at the end of the line, as input signals. During the process, the measured voltages would be phase-compared. On the basis of the normalized energy, the direction of the phase conductor, with a broken point, would be detected. Software tool Matlab/Simulink package has developed a radial network model which simulates the broken phase conductor. The simulations generated required input signals by which the algorithm was tested. Development of the algorithm along with the formation of the simulation model and the test results of the proposed algorithm are presented in this paper.

  7. 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.

  8. Broken bodies and present ghosts: Ubuntu and African women’s theology

    Directory of Open Access Journals (Sweden)

    Isabella F. Ras

    2017-02-01

    Full Text Available In this article, the notion of broken bodies is explored in relation to the African body and the history of colonialism in South Africa. This exploration will be rooted in a retelling of the story of the woman, Saartjie Baartman. In this retelling, the product of colonialism comes to the fore in a haunting. Jacques Derrida’s use of the concept of Hauntology is employed to investigate the ethical demand the spectre makes of us. With the help of the African concept of ubuntu and African women’s theologies, we then seek to find healing and restoration for the broken bodies.

  9. Cementing Material From Rice Husk-Broken Bricks-Spent Bleaching Earth-Dried Calcium Carbide Residue

    OpenAIRE

    Muthengia Jackson Washira

    2012-01-01

    A cementious material, coded CSBR (Carbide residue Spent bleaching earth Broken bricks and Rice husks), was made from dried calcium carbide residue (DCCR) and an incinerated mix of rice husks (RH), broken bricks (BB) and spent bleaching earth (SBE). Another material, coded SBR (Spent bleaching earth Broken bricks and Rice husk ash), was made from mixing separately incinerated RH, SBE and ground BB in the same ash ratio as in CSBR. When CSBR was inter-ground with Ordinary Portland Cement (OPC)...

  10. Expandable Micro-motor Bur, design of a new device for least invasive extraction of broken teeth roots

    OpenAIRE

    Shahidi Bonjar, Amir Hashem

    2013-01-01

    Background Extraction of a broken tooth root is often a traumatic experience for both the practitioner and the patient. To extract broken roots, generally invasive approaches as open window surgeries or mucoperiosteal flap and/or removal of buccal bone are performed. Presentation of the hypothesis Expandable micro-motor bur (EMB) is a hypothetical design of a dental instrument proposed for removal of broken teeth roots that cannot be extracted by the routine closed methods and in which common...

  11. Radiology and social media: are private practice radiology groups more social than academic radiology departments?

    Science.gov (United States)

    Glover, McKinley; Choy, Garry; Boland, Giles W; Saini, Sanjay; Prabhakar, Anand M

    2015-05-01

    This study assesses the prevalence of use of the most commonly used social media sites among private radiology groups (PRGs) and academic radiology departments (ARDs). The 50 largest PRGs and the 50 ARDs with the highest level of funding from the National Institutes of Health were assessed for presence of a radiology-specific social media account on Facebook, Twitter, Instagram, Pinterest, YouTube, and LinkedIn. Measures of organizational activity and end-user activity were collected, including the number of posts and followers, as appropriate; between-group comparisons were performed. PRGs adopted Facebook 12 months earlier (P = .02) and Twitter 18 months earlier (P = .02) than did ARDs. A total of 76% of PRGs maintained ≥1 account on the social media sites included in the study, compared with 28% of ARDs (P Instagram, 2%. The prevalence of radiology-specific social media accounts for ARDs was: Facebook, 18%; LinkedIn, 0%; Twitter, 24%; YouTube, 6%; Pinterest, 0%; and Instagram, 0%. There was no significant difference between ARDs and PRGs in measures of end-user or organizational activity on Facebook or Twitter. Use of social media in health care is emerging as mainstream, with PRGs being early adopters of Facebook and Twitter in comparison with ARDs. Competitive environments and institutional policies may be strong factors that influence how social media is used by radiologists at the group and department levels. Copyright © 2015 American College of Radiology. Published by Elsevier Inc. All rights reserved.

  12. CHANGE IN THE MECHANICAL PROPERTIES AND STRESS CORROSION CRACKING UNDER MATERIAL OF METALWARE TENSION OF A CLAMP-FORMING MACHINE ARROW

    Directory of Open Access Journals (Sweden)

    L. K. Polishchuk

    2015-02-01

    Full Text Available Purpose. The aim is to study the effects of conditions and duration of working of structures arrows of a clamp-forming machine on mechanical properties of the material and its stress corrosion cracking under tension. It is necessary to improve the accuracy of resources analysis of boom metalwares of lifting and transporting machines. Methodology. Samples for experimental investigations were made of the elements of arrow continued exploited clamp-forming machine where there were major work stress. Centers of greatest efforts in elements of arrows constructions were determined in its 3D model in the analysis of the stress cards by finite element method. Experimental studies were performed at the facility UVP-6, which determined the characteristics of strength and ductility of samples of two types by means of tensile strain, speed 10-5 s-1 and 10-6 s-1 in air and in the environment of synthetic rain. Metallographic studies were performed on a scanning electron microscope. Findings. Experimental studies found that after long-term operation of arrow of clamp-forming machine material of its most loaded elements changed due to characteristics of strength and ductility. At joint action of corrosion environment and the greatest stress on the surface of the material expressions, point defects are appeared. They are concentrators of local mechanical stress, which reduce the resource construction elements of the arrow. Originality. 1. Firstly set patterns of changes in the mechanical properties of continued operated metal construction of arrow of clamp-forming machine made of St. 3; 2. Received further developed methodology for remaining resource estimation continued operated of metal boom lifting and shipping the machine by taking into account joint action vibration and dynamic loads and corrosive environments. Practical value. Determination the residual resource of continued operated boom lifting and transporting metal machines should be carried out

  13. Book Review: Radiology in Global Health

    Directory of Open Access Journals (Sweden)

    Yogesh Jha

    2015-03-01

    Full Text Available This book review examines Mollura and Lungren’s (eds. Radiology in Global Health: Strategies, Implementation, and Applications (2014. The contributors have attempted to investigate root causes for radiological service-related disparity that exists between prosperous economies and low- and middle-income countries. The book is clearly geared towards manufacturing consent among stakeholders through research-based evidence to amplify the role of radiology in global healthcare through initiation, implementation, amelioration, and developing sustainable solutions for rollout of essential diagnostic/therapeutic radiology services at population levels. This includes reducing access gaps for radiology/imaging services within industrialized countries as well.

  14. Boom Softening and Nacelle Integration on an Arrow-Wing High-Speed Civil Transport Concept

    Science.gov (United States)

    Mack, Robert J.

    1999-01-01

    point of view, this concept was unacceptable from several practical and structural considerations. Preliminary wind-tunnel pressure signature data from the LB-16 wind-tunnel model, which had the engine nacelles mounted under the wings (the usual location), indicated that the application of the Langley nacelle-integration method had been only partially successful in the reduction of the nacelle-volume with nacelle-wing interference-lift pressure disturbances. So, "boom softening" had to also address the task of successful integration of the engine nacelles, with the engines in the required under-the-wing location. Unless this problem was solved, low-sonic-boom and low-drag modifications to the wing planform, the airfoil shape, and the fuselage longitudinal area distribution could be nullified if the nacelle disturbances added increments to the nose-shock strengths that were removed through component tailoring. In this paper, an arrow-wing boom-softened HSC7 concept which incorporated modifications to a baseline McDonnell Douglas concept is discussed. The analysis of the concept's characteristics will include estimates of weight, center of gravity, takeoff field length, mission range, and predictions of its ground-level sonic-boom pressure signature. Additional modifications which enhanced the softened-boom performance of this concept are also described as well as estimates of the performance penalties induced by these modifications.

  15. 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.

  16. 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...

  17. [Radiation protection in interventional radiology].

    Science.gov (United States)

    Adamus, R; Loose, R; Wucherer, M; Uder, M; Galster, M

    2016-03-01

    The application of ionizing radiation in medicine seems to be a safe procedure for patients as well as for occupational exposition to personnel. The developments in interventional radiology with fluoroscopy and dose-intensive interventions require intensified radiation protection. It is recommended that all available tools should be used for this purpose. Besides the options for instruments, x‑ray protection at the intervention table must be intensively practiced with lead aprons and mounted lead glass. A special focus on eye protection to prevent cataracts is also recommended. The development of cataracts might no longer be deterministic, as confirmed by new data; therefore, the International Commission on Radiological Protection (ICRP) has lowered the threshold dose value for eyes from 150 mSv/year to 20 mSv/year. Measurements show that the new values can be achieved by applying all X‑ray protection measures plus lead-containing eyeglasses.

  18. 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.

  19. Thalamic Lesions: A Radiological Review

    Directory of Open Access Journals (Sweden)

    Dimitri Renard

    2014-01-01

    Full Text Available Background. Thalamic lesions are seen in a multitude of disorders including vascular diseases, metabolic disorders, inflammatory diseases, trauma, tumours, and infections. In some diseases, thalamic involvement is typical and sometimes isolated, while in other diseases thalamic lesions are observed only occasionally (often in the presence of other typical extrathalamic lesions. Summary. In this review, we will mainly discuss the MRI characteristics of thalamic lesions. Identification of the origin of the thalamic lesion depends on the exact localisation inside the thalamus, the presence of extrathalamic lesions, the signal changes on different MRI sequences, the evolution of the radiological abnormalities over time, the history and clinical state of the patient, and other radiological and nonradiological examinations.

  20. 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.

  1. A review of pediatric radiology.

    Science.gov (United States)

    Sabbadini, Gary D

    2013-08-01

    In most dental schools, the focus is on teaching students how to treat adults, with little emphasis placed on treating children. The goal of this article is to review some basic concepts in pediatric radiology to help general practitioners have a better understanding of when to take radiographs on children, which radiographs should be taken, what to look for when examining the radiographs and possible ways to treat the problems diagnosed from the radiographs.

  2. Radiation Protection Research: Radiological Assessment

    Energy Technology Data Exchange (ETDEWEB)

    Zeevaert, T

    2000-07-01

    The objectives of SCK-CEN's research in the field of radiological impact assessment are (1) to elaborate and to improve methods and guidelines for the evaluation of restoration options for contaminated sites; (2) to develop, test and improve biosphere models for the performance assessment of radioactive waste disposal in near-surface or geological repositories; (3) to asses the impact of releases from nuclear or industrial installations. Main achievements in these areas for 2000 are summarised.

  3. Subcutaneous granuloma annulare: radiologic appearance

    Energy Technology Data Exchange (ETDEWEB)

    Kransdorf, M.J. [Saint Mary`s Hospital, Richmond, VA (United States). Dept. of Radiol.]|[Department of Radiologic Pathology, Armed Forces Institute of Pathology, Washington, DC (United States); Murphey, M.D. [Department of Radiologic Pathology, Armed Forces Institute of Pathology, Washington, DC (United States)]|[Department of Radiology and Nuclear Medicine, Uniformed Services University of the Health Sciences, Bethesda, Maryland (United States)]|[Department of Radiology, School of Medicine, University of Maryland, Baltimore, Maryland (United States); Temple, H.T. [Department of Orthopedic Surgery, University of Virginia Health Sciences Center, Charlottesville, Virginia (United States)]|[Department of Orthopedic Pathology, Armed Forces Institute of Pathology, Washington, DC (United States)

    1998-05-01

    Objective. Granuloma annulare is an uncommon benign inflammatory dermatosis characterized by the formation of dermal papules with a tendency to form rings. There are several clinically distinct forms. The subcutaneous form is the most frequently encountered by radiologists, with the lesion presenting as a superficial mass. There are only a few scattered reports of the imaging appearance of this entity in the literature. We report the radiologic appearance of five cases of subcutaneous granuloma annulare. Design and patients. The radiologic images of five patients (three male, two female) with subcutaneous granuloma annulare were retrospectively studied. Mean patient age was 6.4 years (range, 2-13 years). The lesions occurred in the lower leg (two), foot, forearm, and hand. MR images were available for all lesions, gadolinium-enhanced imaging in three cases, radiographs in four, and bone scintigraphy in one. Results. Radiographs showed unmineralized nodular masses localized to the subcutaneous adipose tissue. The size range, in greatest dimension on imaging studies, was 1-4 cm. MR images show a mass with relatively decreased signal intensity on all pulse sequences, with variable but generally relatively well defined margins. There was extensive diffuse enhancement following gadolinium administration. Conclusion. The radiologic appearance of subcutaneous granuloma annulare is characteristic, typically demonstrating a nodular soft-tissue mass involving the subcutaneous adipose tissue. MR images show a mass with relatively decreased signal intensity on all pulse sequences and variable but generally well defined margins. There is extensive diffuse enhancement following gadolinium administration. Radiographs show a soft-tissue mass or soft-tissue swelling without evidence of bone involvement or mineralization. This radiologic appearance in a young individual is highly suggestive of subcutaneous granuloma annulare. (orig.) With 3 figs., 17 refs.

  4. Radiological evaluation of familial osteopetrosis

    Energy Technology Data Exchange (ETDEWEB)

    Moon, Moo Chang; Kang, Shin Wha; Won, Jong Jin; Rhee, Song Joo; Choi, Ki Chul [School of Medicine, Jeonbug National University, Jeonju (Korea, Republic of)

    1980-12-15

    Authors found 16 patients with benign osteopetrosis out of 62 members of 4 families and analysed these patients clinically, radiologically, hematologically and biochemically at the Department of Radiology, Jeonbug National University Hospital from October 1977 to June 1980. The results are as follows; 1. We obtained that there is evidence of familial tendency in developing osteopetrosis because of the fact that 15 patients (94%) developed in 3 families and more than 2 patients in each family. In genetical point of view we suspected dominant trait of inheritance and could rule out recessive trait because patients were found in successive generations except for one family. There were no consangulneous marriages among the parents of these patients. 2. The majority of patients were adolescent or adult above 10 years of age when the disease was diagnosed. The incidence was identical in both sex. 3. No clinical symptoms and historical abnormalities were found in 11 patients (69%) and 5 patients (31%) showed only mild symptoms. Among 5 patients with clinical symptoms 3 patients showed pathologic fractures. In all 3 patients, fractures occurred only by mild trauma and affected sites were tubular bones and they were transverse type. 4. There were no specific relationship between ABO types and Rh reactions in developing osteopetrosis and no specific findings in hematological, biochemical and routine urinalysis. 5. The only diagnostic finding in most patients were the typical and specific radiological findings.

  5. Design requirements for radiology workstations.

    Science.gov (United States)

    Moise, Adrian; Atkins, M Stella

    2004-06-01

    This article stresses the importance of capturing feedback from representative users in the early stages of product development. We present our solution to producing quality requirement specifications for radiology workstations, specifications that remain valid over time because we successfully anticipated the industry trends and the user's needs. We present the results from a user study performed in December 1999 in a radiology clinic equipped with state-of-the-art Picture Archiving and Communications Systems (PACS) and imaging scanners. The study involved eight radiologists who answered questions and provided comments on three complementary research topics. First, we asked our subjects to enumerate the advantages and the disadvantages for both softcopy and hardcopy reading. We identified the two major factors for productivity improvement through the use of PACS workstations: workflow re-engineering and process automation. Second, we collected radiologist feedback on the use of hanging protocols (HPs). The results indicated the high importance of automatic image organization through HPs, with the potential effect of reducing the interpretation time by 10-20%. Our subjects estimated that 10-15 HPs would cover about 85%-95% of the regular radiological examinations. Third, we investigated the impact of the display devices on the radiologist's workflow. Our results indicated that the number and the properties of the monitors is a modality-specific requirement. The main results from this study on key functional requirements for softcopy interpretation only recently were incorporated in most of the current, successful PACS workstations.

  6. 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.

  7. Radiological Evaluation of Bowel Ischemia

    Science.gov (United States)

    Dhatt, Harpreet S.; Behr, Spencer C; Miracle, Aaron; Wang, Zhen Jane; Yeh, Benjamin M.

    2015-01-01

    Intestinal ischemia, which refers to insufficient blood flow to the bowel, is a potentially catastrophic entity that may require emergent intervention or surgery in the acute setting. Although the clinical signs and symptoms of intestinal ischemia are nonspecific, CT findings can be highly suggestive in the correct clinical setting. In this chapter we review the CT diagnosis of arterial, venous, and non-occlusive intestinal ischemia. We discuss the vascular anatomy, pathophysiology of intestinal ischemia, CT techniques for optimal imaging, key and ancillary radiological findings, and differential diagnosis. In the setting of an acute abdomen, rapid evaluation is necessary to identify intraabdominal processes that require emergent surgical intervention (1). While a wide-range of intraabdominal diseases may be present from trauma to inflammation, one of the most feared disorders is mesenteric ischemia, also known as intestinal ischemia, which refers to insufficient blood flow to the bowel (2). Initial imaging evaluation for intestinal ischemia is typically obtained with CT. Close attention to technique and search for key radiologic features with relation to the CT technique is required. Accurate diagnosis depends on understanding the vascular anatomy, epidemiology, and pathophysiology of various forms of mesenteric ischemia and their corresponding radiological findings on MDCT. At imaging, not only is inspection of the bowel itself important, but evaluation of the mesenteric fat, vasculature, and surrounding peritoneal cavity also helps improves accuracy in the diagnosis of bowel ischemia. PMID:26526436

  8. 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.

  9. Radiological safety and risk assessment

    Energy Technology Data Exchange (ETDEWEB)

    Hunter, P.H.; Barg, D.C.; Baird, R.D.; Card, D.H.; de Souza, F.; Elder, J.; Felthauser, K.; Jensen, C.; Winkler, V.

    1982-02-01

    A brief radiological safety and risk assessment of a nuclear power generation center with an adjacent on-site waste disposal facility at a specific site in the State of Utah is presented. The assessment was conducted to assist in determining the feasibility and practicality of developing a nuclear energy center (NEC) in Utah consisting of nine 1250 MWe nuclear pressurized water reactor (PWR) electrical generating units arranged in 3 clusters of 3 units each known as triads. The site selected for this conceptual study is in the Horse Bench area about 15 miles directly south of the town of Green River, Utah. The radiological issues included direct radiation exposures to on-site workers and the off-site population, release of radioactive material, and effects of these releases for both normal operations and accidental occurrences. The basic finding of this study is that the concept of an NEC in the Green River area, specifically at the Horse Bench site, is radiologically feasible.

  10. VECTOR AND TENSOR ANALYZING POWERS IN THE PB-208(D)OVER-RIGHT-ARROW,T)PB-207 REACTION AT 200 AND 360 MEV

    NARCIS (Netherlands)

    VANDEWIELE, J; LANGEVINJOLIOT, H; GUILLOT, J; ROSIER, LH; WILLIS, A; MORLET, M; DUHAMELCHRETIEN, G; GERLIC, E; TOMASIGUSTAFSSON, E; BLASI, N; MICHELETTI, S; VANDERWERF, SY

    1992-01-01

    Cross sections and vector and tensor analyzing powers for the main levels in Pb-207 have been measured via the Pb-208(d over arrow pointing right, t)Pb-207 reaction at 200 and 360 MeV incident energies. A(y) and A(yy) spin observables allow a clear identification of the valence levels, especially at

  11. Reverse energy-pooling collisions: K(5D)+Na(3S){r_arrow}K(4P)+Na(3P)

    Energy Technology Data Exchange (ETDEWEB)

    Guldberg-Kjaer, S.; De Filippo, G.; Milosevic, S.; Magnier, S.; Pedersen, J.O. [Niels Bohr Institute, O/rsted Laboratory, Universitetsparken 5, DK-2100, Copenhagen O/ (Denmark); Allegrini, M. [Unita INFM, Dipartimento di Fisica, Universita di Pisa, Piazza Torricelli 2, I--56126, Pisa (Italy)

    1997-04-01

    The observation of a heteronuclear reverse energy pooling process is reported. The cross section for the collision processes K(5D)+Na(3S){r_arrow}K(4P)+Na(3P) has been measured and compared to calculations carried out using a multicrossing Landau-Zener model. {copyright} {ital 1997} {ital The American Physical Society}

  12. SPIN DETERMINATION OF VALENCE AND INNER HOLE STATES VIA THE PB-208((D)OVER-RIGHT-ARROW,T)PB-207 REACTION AT ED=200 MEV

    NARCIS (Netherlands)

    LANGEVINJOLIOT, H; VANDEWIELE, J; GUILLOT, J; GERLIC, E; ROSIER, LH; WILLIS, A; MORLET, M; DUHAMELCHRETIEN, G; TOMASIGUSTAFSSON, E; BLASI, N; MICHELETTI, S; VANDERWERF, SY

    Highly excited neutron hole states in Pb-207 have been studied via the (d, over arrow pointing right, t) reaction at E(d) = 200 MeV using for the first time a polarized beam, with both vector and tensor components. The determination of overlapping neutron hole response functions takes advantage of

  13. 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}

  14. 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…

  15. Test Plan for Lockheed Idaho Technologies Company (LITCO), ARROW-PAK Packaging, Docket 95-40-7A, Type A Container

    Energy Technology Data Exchange (ETDEWEB)

    Kelly, D.L.

    1995-10-23

    This report documents the U.S. Department of Transportation Specification 7A Type A (DOT-7A) compliance testing to be followed for qualification of the Lockheed Idaho Technologies Company, ARROW-PAK, for use as a Type A Packaging. The packaging configuration being tested is intended for transportation of radioactive solids, Form No. 1, Form No. 2, and Form No. 3.

  16. California's Schooling Is "Broken": Studies Call for Overhaul of Finance, Governance

    Science.gov (United States)

    Jacobson, Linda

    2007-01-01

    This article reports the findings of 22 studies which document "how broken California's system is." The project, called "Getting Down to Facts," was requested during the 2005-2006 school year by the Republican governor's Advisory Committee on Education Excellence, as well as by Democratic leaders, to reassess California's…

  17. 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...

  18. Machine-vision-based identification of broken inserts in edge profile milling heads

    NARCIS (Netherlands)

    Fernandez Robles, Laura; Azzopardi, George; Alegre, Enrique; Petkov, Nicolai

    This paper presents a reliable machine vision system to automatically detect inserts and determine if they are broken. Unlike the machining operations studied in the literature, we are dealing with edge milling head tools for aggressive machining of thick plates (up to 12 centimetres) in a single

  19. 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.

  20. 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.

  1. Lactic acid production from submerged fermentation of broken rice using undefined mixed culture.

    Science.gov (United States)

    Nunes, Luiza Varela; de Barros Correa, Fabiane Fernanda; de Oliva Neto, Pedro; Mayer, Cassia Roberta Malacrida; Escaramboni, Bruna; Campioni, Tania Sila; de Barros, Natan Roberto; Herculano, Rondinelli Donizetti; Fernández Núñez, Eutimio Gustavo

    2017-04-01

    The present work aimed to characterize and optimize the submerged fermentation of broken rice for lactic acid (LA) production using undefined mixed culture from dewatered activated sludge. A microorganism with amylolytic activity, which also produces LA, Lactobacillus amylovorus, was used as a control to assess the extent of mixed culture on LA yield. Three level full factorial designs were performed to optimize and define the influence of fermentation temperature (20-50 °C), gelatinization time (30-60 min) and broken rice concentration in culture medium (40-80 g L-1) on LA production in pure and undefined mixed culture. LA production in mixed culture (9.76 g L-1) increased in sixfold respect to pure culture in optimal assessed experimental conditions. The optimal conditions for maximizing LA yield in mixed culture bioprocess were 31 °C temperature, 45 min gelatinization time and 79 g L-1 broken rice concentration in culture medium. This study demonstrated the positive effect of undefined mixed culture from dewatered activated sludge to produce LA from culture medium formulated with broken rice. In addition, this work establishes the basis for an efficient and low-cost bioprocess to manufacture LA from this booming agro-industrial by-product.

  2. Broken needle in the penis as a complication of intracavernous injection therapy

    National Research Council Canada - National Science Library

    BAYKAL, Kadir; İŞERİ, Cüneyt; ŞENKUL, Temuçin; ADAYENER, Cüneyt; AKYOL, İlker; KARADEMİR, Kenan

    2007-01-01

    ... önerilen hastaların el becerileri dikkatlice değerlendirilmeli ve doğru enjeksiyon tekniğinin önemi vurgulanmalıdır A 74-year-old male applied to the emergency room having a broken needle in his penis...

  3. 76 FR 65717 - City of Broken Bow, OK; Notice of Availability of Final Environmental Assessment

    Science.gov (United States)

    2011-10-24

    ... Energy Regulatory Commission City of Broken Bow, OK; Notice of Availability of Final Environmental Assessment In accordance with the National Environmental Policy Act of 1969 and the Federal Energy Regulatory... Forest. Staff prepared a final environmental assessment (EA), which analyzes the potential environmental...

  4. Five cases of iatrogenic foreign body in the heart and/or great vessels. Retrieved percutaneously by interventional radiological technique

    Energy Technology Data Exchange (ETDEWEB)

    Uda, Mitsunobu; Sawada, Satoshi; Oshima, Taichi; Kato, Tsutomu; Harima, Keizo; Tanaka, Yoshimasa

    1988-07-01

    5 cases of iatrogenic foreign body in the heart and/or great vessels were reported. We retrieved these foreign bodies (broken catheters) percutaneously by interventional radiologic technique. We detected foreign bodies by chest X-ray film, echogram and DSA. Echogram was useful in the case of radiopague foreign bodies. DSA revealed foreign bodies more clearly than chest X-ray films. We used multipurpose grasping forceps and loop snare combined with pigtail catheter to retrieve. We could retrieve foreign bodies percutaneously in all cases.

  5. Pressure data for four analytically defined arrow wings in supersonic flow. [Langley Unitary Plan Wind Tunnel tests

    Science.gov (United States)

    Townsend, J. C.

    1980-01-01

    In order to provide experimental data for comparison with newly developed finite difference methods for computing supersonic flows over aircraft configurations, wind tunnel tests were conducted on four arrow wing models. The models were machined under numeric control to precisely duplicate analytically defined shapes. They were heavily instrumented with pressure orifices at several cross sections ahead of and in the region where there is a gap between the body and the wing trailing edge. The test Mach numbers were 2.36, 2.96, and 4.63. Tabulated pressure data for the complete test series are presented along with selected oil flow photographs. Comparisons of some preliminary numerical results at zero angle of attack show good to excellent agreement with the experimental pressure distributions.

  6. 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.

  7. Evidence for a founder effect for the IVS4 +4 A{r_arrow}T mutation in the Fanconi anemia gene FACC in a Jewish population

    Energy Technology Data Exchange (ETDEWEB)

    Verlander, P.C.; Kaporis, A.G.; Qian, L. [Rockefeller Univ., New York, NY (United States)] [and others

    1994-09-01

    Fanconi anemia (FA) is a genetically heterogeneous autosomal recessive disorder defined by hypersensitivity of cells to DNA cross-linking agents; a gene for complementation group C(FACC) has been cloned. Two common mutations, IVS4 +4 A{r_arrow}T and 322delG, and several rare mutations have recently been reported in affected individuals. We now report the development of amplification refractory mutation system (ARMS) assays for rapid, non-radioactive detection of these known mutations in FACC. Primer pairs specific for variant sequences were designed, with the 3{prime} terminal base of one primer matching the variant base. PCR products are separated by electrophoresis on 2.5% agarose gels; mutations are indicated by the presence of a band of a specific size. These ARMS assays can be multiplexed to allow screening for all known mutations in two PCR reactions. We have used these assays for detection of FACC mutations in affected individuals in the International Fanconi Anemia Registry (IFAR), and for carrier detection FACC families. IVS4 +4 A{r_arrow}T is the only FACC mutation found in Jewish FA patients and their families, of both Ashkenazi and Sephardic ancestry. This mutation was not found in any affected individual of non-Jewish origin. In addition, DNA samples from 1596 healthy Jewish individuals primarily of Ashkenazi ancestry were supplied to us by Dor Yeshorim. These samples, ascertained for carrier screening for Tay Sachs, cystic fibrosis, and other genetic diseases with a high frequency in the religious Jewish community served by this organization, were tested for both IVS4 +4 A{r_arrow}T and 322delG mutations; seventeen IVS4 +4 A{r_arrow}T are of Sephardic Jewish ancestry. We hypothesize that IVS4 +4 A{r_arrow}T is a very old mutation, predating the divergence of the Ashkenazi and Sephardic populations. Haplotype analysis with microsatellite markers is in progress.

  8. Analysis and Inverse Design of the HSR Arrow Wing Configuration with Fuselage, Wing, and Flow Through Nacelles

    Science.gov (United States)

    Krist, Steven E.; Bauer, Steven X. S.

    1999-01-01

    The design process for developing the natural flow wing design on the HSR arrow wing configuration utilized several design tools and analysis methods. Initial fuselage/wing designs were generated with inviscid analysis and optimization methods in conjunction with the natural flow wing design philosophy. A number of designs were generated, satisfying different system constraints. Of the three natural flow wing designs developed, the NFWAc2 configuration is the design which satisfies the constraints utilized by McDonnell Douglas Aerospace (MDA) in developing a series of optimized configurations; a wind tunnel model of the MDA designed OPT5 configuration was constructed and tested. The present paper is concerned with the viscous analysis and inverse design of the arrow wing configurations, including the effects of the installed diverters/nacelles. Analyses were conducted with OVERFLOW, a Navier-Stokes flow solver for overset grids. Inverse designs were conducted with OVERDISC, which couples OVERFLOW with the CDISC inverse design method. An initial system of overset grids was generated for the OPT5 configuration with installed diverters/nacelles. An automated regridding process was then developed to use the OPT5 component grids to create grids for the natural flow wing designs. The inverse design process was initiated using the NFWAc2 configuration as a starting point, eventually culminating in the NFWAc4 design-for which a wind tunnel model was constructed. Due to the time constraints on the design effort, initial analyses and designs were conducted with a fairly coarse grid; subsequent analyses have been conducted on a refined system of grids. Comparisons of the computational results to experiment are provided at the end of this paper.

  9. 40 CFR 261.39 - Conditional Exclusion for Used, Broken Cathode Ray Tubes (CRTs) and Processed CRT Glass...

    Science.gov (United States)

    2010-07-01

    ... Cathode Ray Tubes (CRTs) and Processed CRT Glass Undergoing Recycling. 261.39 Section 261.39 Protection of... (CRTs) and Processed CRT Glass Undergoing Recycling. Used, broken CRTs are not solid wastes if they meet... CRT glass (including fine solid materials). (2) Labeling. Each container in which the used, broken CRT...

  10. 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…

  11. Integrating IT into the radiology environment.

    Science.gov (United States)

    McDonald, Andrea

    2002-01-01

    Rather than perpetuating the struggle, "who controls the PACS, Radiology or Information Technology (IT)," Community Hospital of the Monterey Peninsula (CHOMP) took the approach of incorporating IT support within the Radiology Department. CHOMP faced the challenge of staffing Radiology computer systems and networks by using a two-pronged approach; promoting and training clinical staff in IT functions and transferring an experienced IT person into the Radiology Department. Roles and responsibilities are divided. CHOMP's IT Department supports the Radiology Department's desktop devices, PCs, printers, and standard peripherals; while the department's DICOM print and archive network, specialized hardware (e.g., Merge DICOM interface computers), and applications are supported by the Radiology Department. The IT Department provides operating system support for multi-user VMS, Unix, and NT-based systems, e.g. Sun Solaris for the DICOM archive, and Windows NT for Mitra PACS Broker, the HL7/DICOM interface engine. IT also supports network communications, i.e., network electronics (routers, switches, etc.), TCP/IP communications, and network traffic analysis; and OS operations support for major Radiology systems, e.g. back-ups and off-site tape storage. Radiology staff provides applications support and troubleshooting, including analyst functions for RIS; and are the first point of contact with the Radiology systems vendors, e.g., GE Medical, or Siemens. The Radiology Department's senior IT person, the Clinical Technology Coordinator, transferred from CHOMP's IT Department after 7 years in that department. She performs analysis and design associated with Radiology's computer systems, coordinates development of the department's strategic plan, evaluates vendor proposals, and assists the department with product and application selection. Her IT experience and growing knowledge of Radiology's clinical tasks enhances communications between the Radiology and IT departments. Formal

  12. [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.

  13. A design protocol to develop radiology dashboards.

    Science.gov (United States)

    Karami, Mahtab

    2014-10-01

    The main objective of this descriptive and development research was to introduce a design protocol to develop radiology dashboards. The first step was to determine key performance indicators for radiology department. The second step was to determine required infrastructure for implementation of radiology dashboards. Infrastructure was extracted from both data and technology perspectives. The third step was to determine main features of the radiology dashboards. The fourth step was to determine the key criteria for evaluating the dashboards. In all these steps, non-probability sampling methods including convenience and purposive were employed and sample size determined based on a persuasion model. Results showed that there are 92 KPIs, 10 main features for designing dashboards and 53 key criteria for dashboards evaluation. As well as, a Prototype of radiology management dashboards in four aspects including services, clients, personnel and cost-income were implemented and evaluated. Applying such dashboards could help managers to enhance performance, productivity and quality of services in radiology department.

  14. PACS support: the radiology approach.

    Science.gov (United States)

    Hasley, Tom

    2002-01-01

    In 1999, Rex Healthcare, a 394-bed facility located in Raleigh, N.C., faced a growing problem. The radiology department was performing a total of 130,000 procedures a year, running out of space to store the film, and having trouble managing the file room. While the IT department was focused on the Y2K scare, radiology forged ahead with a plan to implement PACS on its own at Rex Hospital. Rex had installed a mini-PACS system for ultrasound in 1996, but there was no internal support for the system's hardware or software. Being the first in the area to implement PACS, Rex wasn't able to recruit anyone locally to support the system, so they decided to take two areas that PACS had a great impact on and use their own people. The director of radiology asked the RIS analyst and the Film Library manager, both of whom were registered technologists, to implement and support the PAC system. The key to PACS support is not computer knowledge, although it helps. The key is to understand the radiology department as a whole and the workflow from within, which makes it hard to fully support from an IT perspective. The current PACS team at Rex is composed of a PACS analyst, system support specialist and an electronic imaging center manager. When we went live with PACS, it was obvious that not all of the existing file room personnel would make the technology leap, which they realized themselves. We didn't push anybody out, but we did raise the bar of expectations. By redefining job descriptions and having the EITs (electronic imaging technologists) become more involved, increased respect was quite evident among the hospital staff. The clerks that once only hung and filed films are now troubleshooting CD burners, teaching physicians the PACS, and filming necessary exams. The final key to success is to take ownership of your system. By taking ownership, I mean that a PACS team should be established to do troubleshooting and first-line support, know the servers and application, and feel

  15. RADIOLOGY

    African Journals Online (AJOL)

    This is a report of 2 males aged 48 years and 50 years respectively presenting with persistent cough. Computed tomography showed posterior and anterior mediastinai masses respectively. Needle aspiration and cytology confirmed teratorna, with sarcomatous change in the first patient. Due to advanced disease only ...

  16. Industry and radiology in Singapore.

    Science.gov (United States)

    Tan, L K

    1993-08-01

    Singapore is an ideal educational and commercial hub because of its its central location within Asia, its excellent communication and transportation network, and its ability to remain in the forefront of technology where medical equipment and radiology are concerned. Technologists well trained and fluent in more than one language with an excellent command of English ensures that they benefit from their training stints overseas. From the manufacturer's vantage point, the training center at NUH remains a highly developed center of excellence in Asia, functioning as a shop window for potential clients. Catering to both technologists and radiologists, the center represents the manufacturer's contribution to growth and continued up-grading of the standards in Southeast Asia. We hope that this experiment, the only concrete attempt by any manufacturer in contributing to the radiologic community in Singapore and Southeast Asia, will continue to grow and to develop and become a channel for industry to continue such contributions. One important question that must be addressed is whether all equipment must be purchased from this one manufacturer. There is no such arrangement, and whatever equipment is needed is purchased from any source, depending on budgetary constraints and other restrictions. We believe that training and contributing to the growth, understanding, and application of all modalities in radiology should be worldwide, but organized regionally. In planning training programs, companies must look beyond their countries of origin and rely more heavily on input from their local, regional, and national offices. We hope that the program we have established will serve as a model that can be used elsewhere.

  17. Importance of mentoring in Australian radiology training.

    Science.gov (United States)

    Rhodes, Alexander

    2013-10-01

    Mentoring is widely accepted as a fundamental component of a number of professions; however, mentoring is underutilized, and its practice is poorly instituted in most Australian radiology training programmes. This article highlights the benefits of mentoring within the radiology training context. Potential barriers to successful mentoring are elucidated, and future pathways for improved implementation and application of mentor programmes with radiology training programmes are presented. © 2013 The Royal Australian and New Zealand College of Radiologists.

  18. Consequences of outsourcing referrals for radiological examinations

    OpenAIRE

    Tavakol Olofsson, Parvin

    2016-01-01

    Background: Demands for ever more effective healthcare and care accessibility for all patients continue to increase the workload in diagnostic radiology departments. Along with rapid developments in imaging technology which affect its day-to-day clinical use, these are three important factors for which outsourcing might be a potential solution. Outsourcing radiological examinations increases the need for cooperation between different healthcare units. Outsourcing a radiologi...

  19. 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. © RSNA, 2014.

  20. 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.

  1. Radiological hazards of narghile smoking

    Energy Technology Data Exchange (ETDEWEB)

    Khater, A.E.M.; Abd El-Aziz, N.S.; Al-Sewaidan, H.A.; Chaouachi, K.

    2008-07-01

    Narghile smoking pastes, known as jurak and moassel, are not standardized manufacture. This study aims at drawing the first conclusions on the potential hazards of radioactivity in relation to moassel-narghile smoking. The results indicate the existence of a wide range of variations in the natural radioactivity. The distribution pattern of these natural radio-nuclides, during smoking, between smoke, ash and water filter is unknown, except for 210Po. Radiological dose assessment due to intake of 210Po was calculated and the possible radio-toxicity of the measured radio-nuclides is discussed. Further research in this direction is needed. (author)(tk)

  2. Computational radiology in skeletal radiography

    Energy Technology Data Exchange (ETDEWEB)

    Peloschek, Ph.; Nemec, S. [Computational Image Analysis and Radiology Lab (CIR), Department of Radiology, Medical University Vienna, Waehringer Guertel 18-20, A-1090 Vienna (Austria); Widhalm, P. [Computational Image Analysis and Radiology Lab (CIR), Department of Radiology, Medical University Vienna, Waehringer Guertel 18-20, A-1090 Vienna (Austria); Pattern Recognition and Image Processing Group, Department of Computer Aided Automation, Vienna University of Technology, Wiedner Hauptstrasse 8-10/020, A-1040 Vienna (Austria); Donner, R. [Computational Image Analysis and Radiology Lab (CIR), Department of Radiology, Medical University Vienna, Waehringer Guertel 18-20, A-1090 Vienna (Austria); Pattern Recognition and Image Processing Group, Department of Computer Aided Automation, Vienna University of Technology, Wiedner Hauptstrasse 8-10/020, A-1040 Vienna (Austria); Institute for Computer Graphics and Vision, Graz University of Technology, Inffeldgasse 16, A-8010 Graz (Austria); Birngruber, E. [Computational Image Analysis and Radiology Lab (CIR), Department of Radiology, Medical University Vienna, Waehringer Guertel 18-20, A-1090 Vienna (Austria); Thodberg, H.H. [Visiana Aps, Sollerodvej 57C, DK-2840 Holte (Denmark); Kainberger, F. [Computational Image Analysis and Radiology Lab (CIR), Department of Radiology, Medical University Vienna, Waehringer Guertel 18-20, A-1090 Vienna (Austria); Langs, G. [Computational Image Analysis and Radiology Lab (CIR), Department of Radiology, Medical University Vienna, Waehringer Guertel 18-20, A-1090 Vienna (Austria)], E-mail: georg.langs@meduniwien.ac.at

    2009-11-15

    Recent years have brought rapid developments in computational image analysis in musculo-skeletal radiology. Meanwhile the algorithms have reached a maturity that makes initial clinical use feasible. Applications range from joint space measurement to erosion quantification, and from fracture detection to the assessment of alignment angles. Current results of computational image analysis in radiography are very promising, but some fundamental issues remain to be clarified, among which the definition of the optimal trade off between automatization and operator-dependency, the integration of these tools into clinical work flow and last not least the proof of incremental clinical benefit of these methods.

  3. Online social networking for radiology.

    Science.gov (United States)

    Auffermann, William F; Chetlen, Alison L; Colucci, Andrew T; DeQuesada, Ivan M; Grajo, Joseph R; Heller, Matthew T; Nowitzki, Kristina M; Sherry, Steven J; Tillack, Allison A

    2015-01-01

    Online social networking services have changed the way we interact as a society and offer many opportunities to improve the way we practice radiology and medicine in general. This article begins with an introduction to social networking. Next, the latest advances in online social networking are reviewed, and areas where radiologists and clinicians may benefit from these new tools are discussed. This article concludes with several steps that the interested reader can take to become more involved in online social networking. Copyright © 2015 AUR. Published by Elsevier Inc. All rights reserved.

  4. Potential risks in radiology departments

    Energy Technology Data Exchange (ETDEWEB)

    Hernanz-Schulman, Marta [Vanderbilt University Medical Center, Department of Radiology and Radiological Sciences, Monroe Carell Jr. Children' s Hospital at Vanderbilt, Nashville, TN (United States)

    2008-11-15

    Pediatric patients in the Emergency Department (ED) often need diagnostic imaging examinations. These range from radiographs to fluoroscopic procedures to CT and MRI. Each of these examinations requires transportation and hand-offs (transfer of patient to different health care workers), and each carries inherent risks of the procedure itself. The following material will examine a variety of common situations that involve interaction between patients from the ED and the radiology department and describe potential risks and methods through which these risks can be minimized. (orig.)

  5. Environmental radiology assessment in Lahad Datu, Sabah

    Science.gov (United States)

    Siti Fharhana, Yusof; Wan Muhamad Saridan, Wan Hassan; Ahmad Termizi, Ramli; Mohd Hilmi, Sahini; Mohammad Syazwan, Mohd Sanusi; Nor Afifah, Basri; Nor Zati Hani, Abu Hanifah

    2017-10-01

    Monitoring terrestial gamma radiation is crucial to prepare a baseline data for environmental radiological protection. Radiological research was carried out in Lahad Datu, Sabah to obtain the radioactivity status and terrestrial gamma radiation level in the area. We measure the terrestrial gamma radiation dose rates and analyse the radioactivity concentration of primordial radionuclides for radiological risk assessment. We identified that the annual estimation of dose effective for public is below the public dose limit, 1 mSv per year. Public and environment safety and health are remain secure. The obtained data and results can be used as reference for environmental radiology protection.

  6. 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.).

  7. The role of radiology in Campylobacter enterocolitis.

    Science.gov (United States)

    Demaerel, P; Ponette, E; Lacquet, F; Verbist, L; Rutgeerts, P; Baert, A L

    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 nonspecific 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.

  8. Environmental radiology assessment in Lahad Datu, Sabah

    Directory of Open Access Journals (Sweden)

    Siti Fharhana. Yusof

    2017-01-01

    Full Text Available Monitoring terrestial gamma radiation is crucial to prepare a baseline data for environmental radiological protection. Radiological research was carried out in Lahad Datu, Sabah to obtain the radioactivity status and terrestrial gamma radiation level in the area. We measure the terrestrial gamma radiation dose rates and analyse the radioactivity concentration of primordial radionuclides for radiological risk assessment. We identified that the annual estimation of dose effective for public is below the public dose limit, 1 mSv per year. Public and environment safety and health are remain secure. The obtained data and results can be used as reference for environmental radiology protection.

  9. Broken Symmetry

    CERN Multimedia

    CERN. Geneva

    2011-01-01

    - The discovery of subatomic structures and of the concomitant weak and strong short-range forces raised the question of how to cope with short-range forces in relativistic quantum field theory. The Fermi theory of weak interactions, formulated in terms of point-like current-current interaction, was well-defined in lowest order perturbation theory and accounted for existing experimental data.However, it was inconsistent in higher orders because of uncontrollable divergent quant...

  10. Broken Leg

    Science.gov (United States)

    ... completely. This is particularly common in an open fracture of your tibia because of lower blood flow to this bone. ... home. Accessed March 10, 2014. Fields KB. Stress fractures of the tibia and fibula. http://www.uptodate.com/home. Accessed ...

  11. Broken Leg

    Science.gov (United States)

    ... been weakened by a condition such as osteoporosis. Risk factors Stress fractures are often the result of repetitive ... the joint and poor bone alignment can cause osteoarthritis years later. If your leg starts to hurt ...

  12. Broken bone

    Science.gov (United States)

    ... McCormack RG, Lopez CA. Commonly encountered fractures in sports medicine. In: Miller MD, Thompson SR, eds. DeLee and Drez's Orthopaedic Sports Medicine . 4th ed. Philadelphia, PA: Elsevier Saunders; 2015:chap ...

  13. Broken Arm

    Science.gov (United States)

    ... can cause arthritis there years later. Stiffness. The immobilization required to heal a fracture in the upper ... if you notice numbness or circulation problems. Compartment syndrome. Excessive swelling of the injured arm can cut ...

  14. Broken Nose

    Science.gov (United States)

    ... professional medical treatment. Your doctor may recommend simple self-care measures, such as using ice on the area and taking over-the-counter pain medications. Fixing displacements and breaks Your doctor may be ...

  15. The radiologic findings of neurofibromatosis

    Energy Technology Data Exchange (ETDEWEB)

    Kim, So Sun; Park, Yeon Won; Kim, No Joon; Chun, Byung Hee; Joh, Young Duk [Kosin Medical College, Pusan (Korea, Republic of); Suh, Soo Jhi [Keimyung University Medical College, Taegu (Korea, Republic of)

    1986-08-15

    Neurofibromatosis, or von Recklinghausen's disease, is a hereditary, harmartomatous disorder that primarily involves neuro ectoderm and mesoderm. The estimated incidence is 1 in 2,500 to 3,000 births. The clinical features are skin manifestations such as cafe-au-lait spots, skeletal manifestations primarily involving vertebrae, central and peripheral nervous manifestations, and other associated abnormalities with increased risk of malignancy. The authors analysed the radiologic findings of 18 cases of patients with neurofibromatosis who visited Pusan Kosin Medical Center and Taegu Dongsan Medical Center during the last five years. All were proven by surgery, biopsy and other diagnostic criteria. The results obtained were as follows: 1. The male to female ratio was 11:7 and the age ranged from 11 months to 51 years. 2. All the cases fulfilled the diagnostic criteria of Crowe and associates. 3. Bone manifestations were present in 44% of the cases. The other radiologic findings were intrathoracic meningocele, bilateral acoustic neurinomas, mediastinal or chest wall mass shadows, and peripheral soft tissue masses. 4. One of the soft tissue masses was proved to be malignant.

  16. Forensic aspects of maxillofacial radiology.

    Science.gov (United States)

    Wood, R E

    2006-05-15

    Radiology has been used extensively in conventional dental identification, anatomically based identification and identification using maxillofacial skeletal landmarks such as the frontal sinus. Examples of these are well documented in the literature. The purpose of this paper was to revisit the methods where radiographic methods may be used to determine identity using the teeth, the root structures and the frontal sinuses. Additionally suggestions are offered for management of radiography in mass disasters and cases where age determination is required. Computer assisted tomography can be used in the assessment of the degree of fit of a weapon to a wound in cases of blunt force skull injury and plane films can assist in depicting the pattern of post mortem skull fractures. Micro-computed tomography has been used in matching weapons to wounds in sharp-force injury cases. The radiologist's role in cases of civil litigation and fraud is discussed and case examples are given. There are gaps in the science where radiological methods are used. The author offers several suggestions for possible research projects to close some of these gaps.

  17. Radiological imaging of the kidney

    Energy Technology Data Exchange (ETDEWEB)

    Quaia, Emilio (ed.) [Trieste Univ. Ospedale di Cattinara (Italy). Ist. Radiologia

    2011-07-01

    This book provides a unique and comprehensive analysis of the normal anatomy and pathology of the kidney and upper urinary tract from the modern diagnostic imaging point of view. The first part is dedicated to the embryology and normal radiological anatomy of the kidney and anatomic variants. The second part presents in detail all of the imaging modalities which can be employed to assess the kidney and the upper urinary tract, including ultrasound, computed tomography, magnetic resonance imaging, and positron emission tomography. Patient preparation and investigation protocols are accurately described, and the principal fields of application of each imaging modality are clearly highlighted. The entire spectrum of kidney pathologies is then presented in a series of detailed chapters. Each pathology is illustrated by high-quality images obtained with state of the art equipment and the most advanced imaging modalities, as well as by figures showing macroscopic and microscopic specimens. The latest innovations in interventional radiology, biopsy procedures, and parametric and molecular imaging are also described, as is the relationship between contrast media and kidney function. This book will be of great interest to all radiologists, oncologists, and urologists who are involved in the management of kidney pathologies in their daily clinical practice. (orig.)

  18. 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.)

  19. Physical and chemical characteristics of cheese bread, using fermented broken rice

    Directory of Open Access Journals (Sweden)

    Andressa CORADO

    2017-10-01

    Full Text Available Abstract Development of new food products, taking as raw material the subproducts obtained during industrial process become an economic and nutritious alternative, since these are usually discarded, caning be a significant nutritional source good. This research aimed to develop cheese bread using fermented broken rice instead of sour starch in four different concentrations (0%, 25%, 50%, 75% and 100%. After the development of formulations, was performed physics and chemicals characterization of products obtained, performing analysis of: proximate composition, dietary fiber, acidity, pH, ºBrix, total soluble sugars, reducing and sucrose. The increased formulations didn’t present significant differences, highlighting the average values of protein 7%, dietary fiber 9% and ash 1.9%. Broken rice, after fermentation process, becomes a profitable alternative instead of the sour starch on cheese breads, saving all the physical and chemical characteristics and being inexpensive.

  20. Abstract knowledge in the broken-string problem: evidence from nonhuman primates and pre-schoolers.

    Directory of Open Access Journals (Sweden)

    Carolina Mayer

    Full Text Available There is still large controversy about whether abstract knowledge of physical problems is uniquely human. We presented 9 capuchin monkeys, 6 bonobos, 6 chimpanzees and 48 children with two versions of a broken-string problem. In the standard condition, participants had to choose between an intact and a broken string as means to a reward. In the critical condition, the functional parts of the strings were covered up and replaced by perceptually similar, but non-functional cues. Apes, monkeys and young children performed significantly better in the standard condition in which the cues played a functional role, indicating knowledge of the functional properties involved. Moreover, a control experiment with chimpanzees and young children ruled out that this difference in performance could be accounted for by differences of perceptual feedback in the two conditions. We suggest that, similar to humans, nonhuman primates partly rely on abstract concepts in physical problem-solving.

  1. Restoration of the symmetries broken by reversible growth in hyperelastic bodies

    Directory of Open Access Journals (Sweden)

    Grillo Alfio

    2003-01-01

    Full Text Available In this paper, we interpret the development of material in homogeneities in continuum, hyper elastic bodies in the presence of reversible growth in terms of broken symmetries [1]. By applying Noether's Theorem [1, 2, 3, 4], we find a set of equations yielding the fields necessary to compensate for the broken symmetry. As growth occurs, these fields provide for an instantaneously updated reference configuration of the body, and are responsible for the dynamical restoring of the body symmetries. In addition, we propose to use these compensating fields in order to generalize the definition of the transplant operator given in [5,6]. This work has been motivated by the current theoretical investigations on the biomechanical aspects of growth in particular cartilage.

  2. 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.

  3. Broken-Symmetry States and Divergent Resistance in Suspended Bilayer Graphene

    Science.gov (United States)

    Feldman, Benjamin; Martin, Jens; Weitz, Thomas; Allen, Monica; Yacoby, Amir

    2010-03-01

    We report the fabrication of suspended bilayer graphene devices with very little disorder. Transport measurements at zero magnetic field indicate that charge inhomogeneity in these flakes reaches as low as 10^10 cm-2. We observe quantum Hall states that are fully quantized at a magnetic field of 0.2 T, as well as broken-symmetry states at intermediate filling factors ν = 0, ±1, ±2 and ±3. In the ν = 0 state, the resistance of the flakes increases exponentially with applied magnetic field and scales as magnetic field divided by temperature. This resistance is predominantly affected by the perpendicular component of the applied field and the extracted gap size is larger than expected from Zeeman splitting, indicating that the broken-symmetry states arise from many-body interactions and underscoring the importance of Coulomb interactions in bilayer graphene.

  4. Abstract Knowledge in the Broken-String Problem: Evidence from Nonhuman Primates and Pre-Schoolers

    Science.gov (United States)

    Mayer, Carolina; Call, Josep; Albiach-Serrano, Anna; Visalberghi, Elisabetta; Sabbatini, Gloria; Seed, Amanda

    2014-01-01

    There is still large controversy about whether abstract knowledge of physical problems is uniquely human. We presented 9 capuchin monkeys, 6 bonobos, 6 chimpanzees and 48 children with two versions of a broken-string problem. In the standard condition, participants had to choose between an intact and a broken string as means to a reward. In the critical condition, the functional parts of the strings were covered up and replaced by perceptually similar, but non-functional cues. Apes, monkeys and young children performed significantly better in the standard condition in which the cues played a functional role, indicating knowledge of the functional properties involved. Moreover, a control experiment with chimpanzees and young children ruled out that this difference in performance could be accounted for by differences of perceptual feedback in the two conditions. We suggest that, similar to humans, nonhuman primates partly rely on abstract concepts in physical problem-solving. PMID:25272161

  5. Quantum Gravity as a Broken Symmetry Phase of a BF Theory

    Directory of Open Access Journals (Sweden)

    Aleksandar Miković

    2006-12-01

    Full Text Available We explain how General Relativity with a cosmological constant arises as a broken symmetry phase of a BF theory. In particular we show how to treat de Sitter and anti-de Sitter cases simultaneously. This is then used to formulate a quantisation of General Relativity through a spin foam perturbation theory. We then briefly discuss how to calculate the effective action in this quantization procedure.

  6. The advanced eccentricity and broken cage diagnostic method for medium voltage induction motors

    OpenAIRE

    Janda Žarko; Janković Marko; Milošević Mladen; Jovanović Blagota

    2012-01-01

    In the paper the comparative diagnostics of medium voltage induction motors has been presented. The methods employed are the motor current signature analysis (MCSA) and the axial leakage flux spectral analysis. All presented test procedures have been conducted on partially loaded motors, one without fault and the other with fault. Rated parameters of case study motors are 6 kV and 3.15 MW, and both motors are installed in one combined steam power plant. The reliable broken rotor bars detectio...

  7. 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.)

  8. Broken SU(3) symmetry at low spin in {sup 178-186}Os

    Energy Technology Data Exchange (ETDEWEB)

    Bouldjedri, A [Department of Physics, Faculty of Science, University of Batna, Avenue Boukhelouf M El Hadi, 05000 Batna (Algeria); Benabderrahmane, M L [Department of Physics, Faculty of Science, University of Constantine, Route Ain El Bey, 25000 Constantine (Algeria)

    2003-07-01

    The test of the SU(3) symmetry near the neutron number N = 104 is extended to the osmium isotopes. It is shown that the available experimental data point towards a slightly broken SU(3) symmetry. This result is analysed theoretically using three mechanisms of symmetry breaking: the effect of SO(6), the consistent Q-formalism and the parameter symmetry of the interacting boson model.

  9. 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.)

  10. A simple technique to retrieve broken guide wire transfixing hip joint

    Directory of Open Access Journals (Sweden)

    Daya Krishna

    2015-01-01

    Full Text Available While operating on the hip joint, breaking of guide wire became a challenge for treating orthopedic surgeon. Here we report a simple method of removal, which requires limited resources and does not need sophisticated instrumentation. By using this method, we remove broken guide wire in a patient of sub-trochantric fracture of femur managed by close reduction and internal fixation by proximal femoral nail. During the removal of the guide wire, after placing distal screw in the neck the guide wire comes out with some difficulty in the final view on image intensifier - the guide wire broken and transfixes the hip joint but does not enter the pelvis. After removal of the distal screw, its cannulated drill bit was connected to a T-handle and introduced into the track of distal screw up to the broken distal end of guide wire and slow manual reaming done under C-arm image intensifier to prevent damage to the articular cartilage. This process was repeated three times after cleaning drill bit each time to clear the base of guide wire for grasping its distal end. With the help of Kerryson rounger/grasper, the distal end of the guide wire was grasped and easily removed. The distal screw was placed in its original track and the procedure was completed.

  11. 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;…

  12. Radiology in the Study of Bone Physiology.

    Science.gov (United States)

    Kushdilian, Michael V; Ladd, Lauren M; Gunderman, Richard B

    2016-10-01

    In this article, we review the core principles of bone physiology alongside imaging examples that demonstrate such principles. The core principles of bone physiology are reviewed and further solidified with a corresponding abnormal pathophysiologic example. The key principles of bone physiology to be reviewed include the following: (1) formation and growth, (2) maintenance and repair, (3) metabolism and regulation, and (4) neoplastic disease. Lastly, a collection of secondary bone diseases is presented to demonstrate the skeletal manifestations of numerous systemic diseases. With this integrative method, we hope to emphasize the value of using radiology to teach physiology within a clinical context. This is especially relevant now, as many US medical schools undergo curricular reform with more emphasis on integrative interdisciplinary learning. Ultimately, we intend to provide a paradigm for incorporating radiology into the pre-clinical medical curriculum through a review of basic science physiology that underlies key radiographic findings of the skeletal system. Radiology is known for its role in helping make diagnoses and clinical decisions. However, radiology is also well suited to enhance medical education by offering the ability to visualize physiology in action. This is especially true in skeletal radiology, where radiographic osseous changes represent a wide range of physiological processes. Therefore, skeletal radiology can be a useful tool for illustrating concepts of physiology that underlie the normal and abnormal radiologic appearances of bone. Radiology is an important but underutilized tool for demonstrating concepts in bone physiology. Copyright © 2016 The Association of University Radiologists. Published by Elsevier Inc. All rights reserved.

  13. Clay as Thermoluminescence Dosemeter in diagnostic Radiology ...

    African Journals Online (AJOL)

    This paper reports the investigation of the basic thermoluminescence properties of clay at x-rays in the diagnostic radiology range, including dose monitoring in abdominal radiography. Clay sourced from Calabar, Nigeria, was tested for thermoluminescence response after irradiation at diagnostic radiology doses, including ...

  14. 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.

  15. 10 CFR 835.4 - Radiological units.

    Science.gov (United States)

    2010-01-01

    ... 10 Energy 4 2010-01-01 2010-01-01 false Radiological units. 835.4 Section 835.4 Energy DEPARTMENT OF ENERGY OCCUPATIONAL RADIATION PROTECTION General Provisions § 835.4 Radiological units. Unless... special units of curie, rad, roentgen, or rem, including multiples and subdivisions of these units, or...

  16. 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.

  17. Radiologic features of ameloblastoma in Nigerians.

    Science.gov (United States)

    Lagundoye, S B; Akinosi, J O; Obisesan, A A; Oluwasanmi, O

    1975-06-01

    Radiology plays an important role in preoperative diagnosis and postoperative assessment of ameloblastoma. The postoperative appearances, including complications as well as radiologic features of recurrence, are discussed. The differential diagnosis of the unilocular lesion is difficult, and particularly noteworthy are the five cases of histologically proven adamantinoma whose radiographic appearance closely mimicked dentigerous cyst.

  18. 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…

  19. Monitor displays in radiology: Part 2

    OpenAIRE

    INDRAJIT, IK; Verma, BS

    2009-01-01

    Monitor displays play an important role in modern radiology practice. Practicing radiologists need to be familiar with the various performance parameters of medical-grade displays. A certain amount of technical knowledge is useful when making purchasing decisions since the right choice of equipment can have a great impact on the accuracy, efficiency, and speed in the radiology department.

  20. History and Organizations for Radiological Protection

    OpenAIRE

    Kang, Keon Wook

    2016-01-01

    International Commission on Radiological Protection (ICRP), an independent international organization established in 1925, develops, maintains, and elaborates radiological protection standards, legislation, and guidelines. United Nations Scientific Committee on the Effects of Atomic Radiation (UNSCEAR) provides scientific evidence. World Health Organization (WHO) and International Atomic Energy Agency (IAEA) utilise the ICRP recommendations to implement radiation protection in practice. Final...

  1. Caroli's disease: radiologic spectrum with pathologic correlation.

    Science.gov (United States)

    Levy, Angela D; Rohrmann, Charles A; Murakata, Linda A; Lonergan, Gael J

    2002-10-01

    The purpose of our study was to describe the spectrum of radiologic and pathologic features of Caroli's disease. Caroli's disease and its complications have overlapping radiologic appearances that reflect the underlying pathology of fibrosis, ductal dilatation, cholangitis, stone formation, and malignancy.

  2. Temperature profile data collected using XBTs from the PACIFIC ARROW and other platforms from the Pacific Ocean during the Thermal Structure Monitoring Program in the Pacific (TRANSPAC) project, 1983-10-07 to 1984-02-15 (NCEI Accession 8400106)

    Data.gov (United States)

    National Oceanic and Atmospheric Administration, Department of Commerce — Temperature profile data were collected using bathythermograph (BT/XBT) casts from PACIFIC ARROW and other platforms in the Pacific Ocean from October 7, 1983 to...

  3. Temperature profile data collected using XBTs from the PACIFIC ARROW from the Pacific Ocean during the Thermal Structure Monitoring Program in the Pacific (TRANSPAC) project, 1977-03-14 to 1977-03-23 (NCEI Accession 8100332)

    Data.gov (United States)

    National Oceanic and Atmospheric Administration, Department of Commerce — Temperature profile data were collected using bathythermograph (BT/XBT) casts from PACIFIC ARROW in the Pacific Ocean from March 14, 1977 to March 23, 1977. Data...

  4. Temperature profile data collected using XBTs from the PACIFIC ARROW from the Pacific Ocean during the Thermal Structure Monitoring Program in the Pacific (TRANSPAC) project, 1976-11-14 to 1976-11-22 (NCEI Accession 8100339)

    Data.gov (United States)

    National Oceanic and Atmospheric Administration, Department of Commerce — Temperature profile data were collected using bathythermograph (BT/XBT) casts from PACIFIC ARROW in the Pacific Ocean from November 14, 1976 to November 22, 1976....

  5. Temperature profile data collected using XBTs from the PACIFIC ARROW from the Pacific Ocean during the Thermal Structure Monitoring Program in the Pacific (TRANSPAC) project, 1976-12-29 to 1977-01-06 (NCEI Accession 8100327)

    Data.gov (United States)

    National Oceanic and Atmospheric Administration, Department of Commerce — Temperature profile data were collected using bathythermograph (BT/XBT) casts from PACIFIC ARROW in the Pacific Ocean from December 29, 1976 to January 6, 1977. Data...

  6. Temperature profile data collected using XBTs from the PACIFIC ARROW from the Pacific Ocean during the Thermal Structure Monitoring Program in the Pacific (TRANSPAC) project, 1977-02-13 to 1977-02-21 (NCEI Accession 8100330)

    Data.gov (United States)

    National Oceanic and Atmospheric Administration, Department of Commerce — Temperature profile data were collected using bathythermograph (BT/XBT) casts from PACIFIC ARROW in the Pacific Ocean from February 13, 1977 to February 21, 1977....

  7. Temperature profile data collected using XBTs from the PACIFIC ARROW from the Pacific Ocean during the Thermal Structure Monitoring Program in the Pacific (TRANSPAC) project, 1976-12-15 to 1976-12-23 (NCEI Accession 8100326)

    Data.gov (United States)

    National Oceanic and Atmospheric Administration, Department of Commerce — Temperature profile data were collected using bathythermograph (BT/XBT) casts from PACIFIC ARROW in the Pacific Ocean from December 12, 1976 to December 23, 1976....

  8. Temperature profile data collected using XBTs from the PACIFIC ARROW from the Pacific Ocean during the Thermal Structure Monitoring Program in the Pacific (TRANSPAC) project, 1977-02-27 to 1977-03-08 (NCEI Accession 8100331)

    Data.gov (United States)

    National Oceanic and Atmospheric Administration, Department of Commerce — Temperature profile data were collected using bathythermograph (BT/XBT) casts from PACIFIC ARROW in the Pacific Ocean from February 27, 1977 to March 8, 1977. Data...

  9. Temperature profile data collected using XBTs from the PACIFIC ARROW from the Pacific Ocean during the Thermal Structure Monitoring Program in the Pacific (TRANSPAC) project, 1977-05-26 to 1977-06-03 (NCEI Accession 8100341)

    Data.gov (United States)

    National Oceanic and Atmospheric Administration, Department of Commerce — Temperature profile data were collected using bathythermograph (BT/XBT) casts from PACIFIC ARROW in the Pacific Ocean from May 26, 1977 to June 3, 1977. Data were...

  10. Temperature profile data collected using XBTs from the PACIFIC ARROW from the Pacific Ocean during the Thermal Structure Monitoring Program in the Pacific (TRANSPAC) project, 1976-12-01 to 1976-12-07 (NCEI Accession 8100325)

    Data.gov (United States)

    National Oceanic and Atmospheric Administration, Department of Commerce — Temperature profile data were collected using bathythermograph (BT/XBT) casts from PACIFIC ARROW in the Pacific Ocean from December 1, 1976 to December 7, 1976. Data...

  11. Temperature profile data collected using XBTs from the PACIFIC ARROW from the Pacific Ocean during the Thermal Structure Monitoring Program in the Pacific (TRANSPAC) project, 1977-06-24 to 1977-07-02 (NCEI Accession 8100343)

    Data.gov (United States)

    National Oceanic and Atmospheric Administration, Department of Commerce — Temperature profile data were collected using bathythermograph (BT/XBT) casts from PACIFIC ARROW in the Pacific Ocean from June 24, 1977 to July 2, 1977. Data were...

  12. Temperature profile data collected using XBTs from the GOLDEN ARROW from the Pacific Ocean during the Thermal Structure Monitoring Program in the Pacific (TRANSPAC) project, 1977-05-17 to 1977-05-21 (NCEI Accession 8100298)

    Data.gov (United States)

    National Oceanic and Atmospheric Administration, Department of Commerce — Temperature profile data were collected using bathythermograph (BT/XBT) casts from GOLDEN ARROW in the Pacific Ocean from May 17, 1977 to May 21, 1977. Data were...

  13. Temperature profile data collected using XBTs from the PACIFIC ARROW from the Pacific Ocean during the Thermal Structure Monitoring Program in the Pacific (TRANSPAC) project, 1977-07-24 to 1977-08-01 (NCEI Accession 8100345)

    Data.gov (United States)

    National Oceanic and Atmospheric Administration, Department of Commerce — Temperature profile data were collected using bathythermograph (BT/XBT) casts from PACIFIC ARROW in the Pacific Ocean from July 24, 1977 to August 1, 1977. Data were...

  14. Radiologic features in histiocytosis syndrome

    Energy Technology Data Exchange (ETDEWEB)

    Hong, Sung Mo; Cho, Byung Jae; Yeon, Kyung Mo [College of Medicine, Seoul National University, Seoul (Korea, Republic of)

    1980-12-15

    Histiocytosis syndrome is not rare disease of unknown etiology, characterized by development of granulomatous lesions with histiocytic proliferation. Authors analyzed 22 cases, which had been confirmed as histiocytosis syndrome from 1971 to Feb. 1980 with special attention to 15 cases showing positive findings on radiological examinations. The results are as follows. 1. Overall male to female ratio was about 2:1. The majority were between 1 and 7 years of age. 2. Skeletal system was involved in orders as follows: skull, pelvis, femur, rib, spine. 3. Four cases of pulmonary involvement were experienced. All cases had interstitial involvement with reticulonodular densities on roentgenograms. 4. We had experienced a pituitary tumor, presumably localized histiocytic mass, in a patient with diabetes insipidus. 5. In long bone involvement, diaphysis or metaphysis was usually involved, but in one patient, lesion were extended into epiphysis. 6. One case of platyspondyly was found, with symmetrical compression.

  15. 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.

  16. Radiologic findings of rib tumor

    Energy Technology Data Exchange (ETDEWEB)

    Lee, Young Seok; Choi, Byung Ihn; Im, Jung Gi [Seoul National University College of Medicine, Seoul (Korea, Republic of)

    1983-12-15

    Authors reviewed 21 cases of histologically confirmed rib tumor except metastasis and myeloma from November 1973 to December 1982 at Seoul National University Hospital. The results are as follows: 1. Major clinical findings are pain and mass. 2. Pathologic diagnosis of rib tumors are 5 cases of fibrous dysplasia, 3 chondroma, 2 osteochondroma, 2 desmoplastic fibroma, 3 chondroma, 2 osteochondroma, 2 desmoplastic fibroma, 5 osteosarcoma, 1 aneurysmal bone cyst, 1 eosinophilic granuloma, 1 cavernous hemangioma, 1 chondrosarcoma. 3. Radiologic findings are osteolytic change and cortical expansion without marginal sclerosis in fibrous dysplasia, central location, well-defined osteolytic change with marginal sclerosis and no cortical destruction in desmoplastic fibroma, cortical destruction, soft tissure mass and pleural effusion in malignant tumors.

  17. Radiologic sciences. Faculty needs assessment.

    Science.gov (United States)

    Powers, Kevin J

    2005-01-01

    A total of 326 programs are represented in the data collected. Based on the average number of full- and part-time faculty members reported per program, this survey represents more than 1500 faculty positions. Based on the forecast of retirement and career change for all faculty members, there will be a turnover of 700 to 800 positions over the next 5 to 10 years. Part-time/adjunct faculty vacancies are expected to create the greatest number of opportunities for technologists to make the transition to education, with approximately one third of current part-time/adjunct educators planning on leaving radiologic sciences education within 5 years. To encourage retention of part-time/adjunct educators, annual evaluations should be modified to recognize the important educational role these instructors play. There is a need to create enthusiasm and interest in education as a career pathway for radiologic technologists. Resources are needed that help radiologic technologists make the transition to teaching. Finally, the retention of educators must be emphasized. Program applicant trends indicate radiologic technology students are older, have prior postsecondary education experience or are making a career change. This data emphasizes the need for educators, both full time and part time, to understand the characteristics and needs of the adult learner. Adult learners bring a wealth of education, experience and life skills that create both opportunities and challenges in the classroom and clinical setting. All categories of respondents indicated that their current salaries were greater than those of program graduates in their firstjob. Of interest is that 1 in 5 (20%) of part-time/adjunct educators indicated the opposite--that program graduates earn more in their firstjob than educators earn. When asked about salaries if working full time in clinical practice, the majority of all groups indicated their salary would be about the same or would decrease. Only 20% of program

  18. Radiologic appearance of pancreatic cystadenocarcinoma

    Energy Technology Data Exchange (ETDEWEB)

    Yamamoto, Shinichiro; Nagano, Hideki; Kimoto, Masatoshi and others

    1988-07-01

    We report the radiologic appearance of pancreatic cystadenoma and cystadenocarcinoma by various imaging methods. US demonstrated predominantly cystic mass containing internal septations. Highly echogenic solid components are often noted within cysts. CT revealed an encapsulated and lobulated cystic mass and most of the cysts contained thin and curvilinear septa within multilocular mass. Calcifications were often noted in the thick wall of the cysts. ERP showed extension of the pancreatic duct and no communication between cysts and pancreatic duct seemed to be characteristic findings. By angiography displacement of pancreatic vessels without encasement were common features and abnormal staining were noted in some cases. Seven cases experienced in our laboratory were analyzed clinically and one case of 90 year old female might be the oldest case ever reported.

  19. 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.

  20. 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. Copyright © 2012 SIR. Published by Elsevier Inc. All rights reserved.

  1. Radiological protection in veterinary practice

    Energy Technology Data Exchange (ETDEWEB)

    Konishi, Emiko; Tabara, Takashi (Tokyo Univ. (Japan). Research Center for Nuclear Engineering and Technology); Kusama, Tomoko

    1990-06-01

    To propose measures for radiological protection of veterinary workers in Japan, X-ray exposure of workers in typical conditions in veterinary clinics was assessed. Dose rates of useful beam and scattered radiation, worker exposure doses at different stations, and effectiveness of protective clothing were determined using TLD and ion chambers. As precausions against radiation, the following practices are important: (1) use of suitable and properly maintained X-ray equipment, (2) proper selection of safe working stations, (3) use of protective clothing. Regulations are necessary to restrict the use of X-rays in the veterinary field. Because the use of X-rays in the veterinary field is not currently controlled by law, the above precautions are essential for minimizing exposure of veterinary staff. (author).

  2. 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.

  3. Radiologic findings of ovarian fibrothecoma

    Energy Technology Data Exchange (ETDEWEB)

    Yang, Dong Cheol; Im, Ju Hyeon; Kim, Sun Su; Kim, Jong An; Park, Byung Ran [Kwangju Christian Hospital, Kwangju, (Korea, Republic of); Kang, In Young [Kwangju Green Cross Hospital, Kwangju (Korea, Republic of); Ko, Kang Seok [College of Medicine, Chosun University, Kwangju (Korea, Republic of)

    2000-01-01

    To evaluate the radiologic features of fibrothecoma of the ovary, which is a rare solid tumor originating from the ovarian sex cord-stroma. The radiologic findings of 29 patients with pathologically-proven fibrothecoma of the ovary were retrospectively evaluated for bilaterality, size, shape, margin, echogenecity, CT attenuation, signal intensity on magnetic resonance imaging, calcification, and amount of ascites. All fibrothecomas were unilateral, and had well defined margins. The diameter of the mass was 4-18 (mean, 9.6) cms. Eighteen of 29 tumors were round or oval with a smooth margin, and eleven were lobulated. The internal architecture of the tumor was purely solid in 21 patients, predominantly solid in six, and pre-dominantly cystic in two. A broad spectrum of sonographic features was apparent, including a homogeneously hypoechoic mass (with posterior shadowing in four cases, and without posterior shadowing in ten), a homogeneously hyperechoic mass in seven cases, an anechoic mass with septatations in two, and a mixed echoic mass in six. On precontrast CT scans, the mass was isodense to the uterine myomettrium in seven cases and isodense in one. On T1-weighted MR images, nine of ten cases showed a relatively homogeneous low signal intensity, while on T2-weighted images, signal intensity was homogeneously low in two patients and predominantly low with focal high intensity in seven of the other eight. On gadolinium-enhanced T1-weighted images, most tumors showed slight heterogeneous enhancement. Calcifications were present in two cases, and in two others there was a large amount of ascites. The characteristic findings of ovarian fibrothecomas is a well-defined, oval or lobulated homogeneously solid mass, which on CT scans enhances less than uterine myometrium and demonstrates a predominantly low signal intensity on both T1-and T2-weighted images, However, a predominantly solid mass with cystic components or a predominantly cystic mass may also be presented

  4. Instructions for Radiological Case Reports.

    Science.gov (United States)

    Bannas, Peter

    2017-04-01

    Purpose  This paper explains the purpose and structure of a radiological case report and provides guidance for radiologists with respect to the writing of a well-structured patient case report. Materials and Methods  The current literature and the author's experience as a writer were used to create a manual that describes steps for preparing a radiological case report containing all of the important ingredients for effective communication. Results  Case reports are the first line of evidence in documenting clinical observations in the literature. A case report should be written succinctly and consists of four structured main sections: introduction, description of the case, discussion and conclusion. Its structure follows the structure of an original research article, whereby the description of the case of the case report corresponds to the materials and methods section of the research article. The introduction provides the subject and merit of the case report with respect to the published literature. The case description presents the case in detail and chronological order to allow for plausibility. The discussion compares the case with the published literature and summarizes the essential features. A case report, like an original article, must provide a justified conclusion. The conclusion should be brief and be applicable to clinical practice. Conclusion  The unique quality of the case, proper preparation and a clear conclusion are essential for a case report to be published. Key Points: · Case reports are the first line of evidence in documenting clinical observations in the literature. · The structure of a case report structure follows the structure of an original research article. · The unique quality of the case, proper preparation and a clear conclusion are essential for a case report to be published.. Citation Format · Bannas P. Anleitung zum Schreiben eines radiologischen Fallberichts. Fortschr Röntgenstr 2017; 189: 333 - 337.

  5. 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.

  6. Influence of extrusion of corn and broken rice on energy content and growth performance of weaning pigs.

    Science.gov (United States)

    Liu, Hua; Wan, Haifeng; Xu, Shengyu; Fang, Zhengfeng; Lin, Yan; Che, Lianqiang; Li, Jian; Li, Yong; Su, Xiang; Wu, De

    2016-11-01

    Two experiments were conducted to study the effects of extrusion on the energy content of corn and broken rice and on growth performance of weaning pigs. In experiment 1, 24 barrows (28 days old, 7.28 ± 0.90 kg body weight (BW)) were used to compare the effects of extrusion of corn and broken rice on the values of digestible energy (DE) in weaned pigs. The DE content in extruded corn (17.45 MJ/kg dry matter (DM)) was significantly greater (P growth performance of pigs. The inclusion of broken rice in the diets improved (P growth performance of pigs during the first week and the 2 weeks post-weaning but not thereafter. However, there was no significant difference in growth performance between treatments in other periods. Overall, this study indicates that feeding weaning pigs with broken rice has beneficial results. © 2016 Japanese Society of Animal Science.

  7. Student Perceptions of Online Radiologic Science Courses.

    Science.gov (United States)

    Papillion, Erika; Aaron, Laura

    2017-03-01

    To evaluate student perceptions of the effectiveness of online radiologic science courses by examining various learning activities and course characteristics experienced in the online learning environment. A researcher-designed electronic survey was used to obtain results from students enrolled in the clinical portion of a radiologic science program that offers online courses. The survey consisted of elements associated with demographics, experience, and perceptions related to online radiologic science courses. Surveys were sent to 35 program directors of Joint Review Committee on Education in Radiologic Technology-accredited associate and bachelor's degree programs with requests to share the survey with students. The 38 students who participated in the survey identified 4 course characteristics most important for effective online radiologic science courses: a well-organized course, timely instructor feedback, a variety of learning activities, and informative documents, such as course syllabus, calendar, and rubrics. Learner satisfaction is a successful indicator of engagement in online courses. Descriptive statistical analysis indicated that elements related to the instructor's role is one of the most important components of effectiveness in online radiologic science courses. This role includes providing an organized course with informative documents, a variety of learning activities, and timely feedback and communication. Although online courses should provide many meaningful learning activities that appeal to a wide range of learning styles, the nature of the course affects the types of learning activities used and therefore could decrease the ability to vary learning activities. ©2017 American Society of Radiologic Technologists.

  8. Radiology research in mainland China in the past 10 years: a survey of original articles published in Radiology and European Radiology.

    Science.gov (United States)

    Zhang, Long Jiang; Wang, Yun Fei; Yang, Zhen Lu; Schoepf, U Joseph; Xu, Jiaqian; Lu, Guang Ming; Li, Enzhong

    2017-10-01

    To evaluate the features and trends of Radiology research in Mainland China through bibliometric analysis of the original articles published in Radiology and European Radiology (ER) between 2006 and 2015. We reviewed the original articles published in Radiology and ER between 2006 and 2015. The following information was abstracted: imaging subspecialty, imaging technique(s) used, research type, sample size, study design, statistical analysis, study results, funding declarations, international collaborations, number of authors, department and province of the first author. All variables were examined longitudinally over time. Radiology research in Mainland China saw a substantial increase in original research articles published, especially in the last 5 years (P research, neuroradiology, vascular/interventional Radiology, and abdominal Radiology were the most productive fields; MR imaging was the most used modality, and a distinct geographic provenience was observed for articles published in Radiology and ER. Radiology research in Mainland China has seen substantial growth in the past 5 years with neuroradiology, vascular/interventional Radiology, and abdominal Radiology as the most productive fields. MR imaging is the most used modality. Article provenience shows a distinct geographical pattern. • Radiology research in Mainland China saw a substantial increase. • Neuroradiology, vascular/interventional Radiology, and abdominal Radiology are the most productive fields. • MRI is the most used modality in Mainland China's Radiology research. • Guangdong, Shanghai, and Beijing are the most productive provinces.

  9. Justification and radiology: some ethical considerations.

    Science.gov (United States)

    Sia, Santiago

    2009-07-01

    This paper, which seeks to address the issue of justification in radiology, intends firstly to comment on the current discussion of the ethical foundation of radiological practice that focuses on the move from utilitarianism to the rights-centred criterion. Secondly, and this constitutes the bulk of the paper, it aims to offer a philosophical perspective, which is hoped will lead to a consideration of certain specific areas in ethical decision-making in the attempts here to deal with the main issue of justification in radiology.

  10. Current radiologic interventions in hepatocellular carcinoma.

    Science.gov (United States)

    Qasmi, Imran Masoud; Naeem, Tahir; Farrukh, Saeed; Mirza, Shakeel Ahmed; Khan, Muhammad Asad; Bhatti, Muhammad Asghar

    2006-09-01

    With the rising incidence of chronic liver disease caused by viral hepatitis, hepatocellular carcinoma is showing a corresponding rise worldwide. Surgery remains the mainstay of treatment, but patients unfit for surgery or liver transplantation form the bulk of those presenting with this disease. Palliative treatments are being used to treat those and radiological modalities form the mainstay of the treatment. Radiology plays a major role in the diagnosis, treatment and follow-up of hepatocellular carcinoma. Current radiological treatment modalities include percutaneous ethanol ablation, radiofrequency ablation and trans-arterial chemoembolization. This update highlights the recent advancements in the field and compares their relative merits and demerits.

  11. Problem-based learning and radiology

    Energy Technology Data Exchange (ETDEWEB)

    Thurley, P. [Department of Radiology, Nottingham University Hospitals, Queens Medical Centre, Nottingham (United Kingdom)], E-mail: peter.thurley@ntlworld.com; Dennick, R. [Medical Education Unit, Medical School, University of Nottingham, Nottingham (United Kingdom)

    2008-06-15

    The Royal College of Radiologists recently published documents setting out guidelines to improve the teaching of radiology to medical students. These included recommendations that clinicians who teach radiology should be aware of newer educational techniques, such as problem-based learning, and should be involved in the development of curricula and assessment in medical schools. This review aims to introduce the educational theories behind problem-based learning and describe how a problem-based learning tutorial is run. The relevance of problem-based learning to radiology and the potential advantages and disadvantages are discussed.

  12. Mandibular Canal Enlargement: Clinical and Radiological Characteristics

    Directory of Open Access Journals (Sweden)

    Chong Jun Ai

    2017-01-01

    Full Text Available Enlargement of the mandibular canal is a rare radiological finding. Clinically, it may or may not be associated with sensory deficits. We report four cases of widening of the mandibular canal observed with various methods of imaging with different clinical characteristics. We describe this unique radiological finding and elaborate the importance of quality assessment of the imaging that is vital for accurate diagnosis and treatment planning. Clinicians should be mindful when assessing the imaging whenever the size of the mandibular canal is implicated. The case ranged from a benign tumor to malignancy, radiological errors, and artifacts. A more superior imaging or treatment modality was necessary to ascertain the diagnosis.

  13. [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. Copyright © 2011 SERAM. Published by Elsevier Espana. All rights reserved.

  14. Radiologic findings of thoracic trauma

    Directory of Open Access Journals (Sweden)

    Akgul Ozmen C

    2017-08-01

    Full Text Available Cihan Akgul Ozmen,1 Serdar Onat,2 Delal Aycicek3 1Department of Radiology, 2Department of Chest Surgery, Dicle University School of Medicine, Diyarbakir, 3Radiology Unit, Siirt State Hospital, Siirt, Turkey Introduction: Chest trauma may be blunt or penetrating and the chest is the third most common trauma region. It is a significant cause of mortality. Multidetector computed tomography (MDCT has been an increasingly used method to evaluate chest trauma because of its high success in detecting tissue and organ injuries. Herein, we aimed to present MDCT findings in patients with blunt and penetrating chest trauma admitted to our department. Methods: A total of 240 patients admitted to the emergency department of our hospital between April 2012 and July 2013 with a diagnosis of chest trauma who underwent MDCT evaluations were included. Most of the patients were male (83.3% and victims of a blunt chest trauma. The images were analyzed with respect to the presence of fractures of bony structures, hemothorax, pneumothorax, mediastinal organ injury, and pulmonary and vascular injuries. Results: MDCT images of the 240 patients yielded a prevalence of 41.7% rib fractures, 11.2% scapular fractures, and 7.5% clavicle fractures. The prevalence of thoracic vertebral fracture was 13.8% and that of sternal fracture was 3.8%. The prevalence of hemothorax, pneumothorax, pneumomediastinum, and subcutaneous emphysema was 34.6%, 62.1%, 9.6%, and 35.4%, respectively. The prevalence of rib, clavicle, and thoracic vertebral fractures and pulmonary contusion was higher in the blunt trauma group, whereas the prevalence of hemothorax, subcutaneous emphysema, diaphragmatic injury, and other vascular lacerations was significantly higher in the penetrating trauma group than in the blunt trauma group (p<0.05. Conclusion: MDCT images may yield a high prevalence of fracture of bony structures, soft tissue lacerations, and vascular lesions, which should be well understood by

  15. Addressing the Coming Radiology Crisis—The Society for Computer Applications in Radiology Transforming the Radiological Interpretation Process (TRIP™) Initiative

    OpenAIRE

    Andriole, Katherine P.

    2004-01-01

    The Society for Computer Applications in Radiology (SCAR) Transforming the Radiological Interpretation Process (TRIP™) Initiative aims to spearhead research, education, and discovery of innovative solutions to address the problem of information and image data overload. The initiative will foster interdisciplinary research on technological, environmental and human factors to better manage and exploit the massive amounts of data. TRIP™ will focus on the following basic objectives: improving the...

  16. Symmetry-broken effects on electron momentum spectroscopy caused by adiabatic vibration

    Science.gov (United States)

    Zhu, Yinghao; Ma, Xiaoguang; Lou, Wenhua; Wang, Meishan; Yang, Chuanlu

    2017-11-01

    The vibronic coupling effect is usually studied by invoking the breakdown of Born-Oppenheimer approximation. The present study shows that the symmetry-broken effect induced by nuclei vibrations can also lead strong impact on the electronic states under the framework of Born-Oppenheimer approximation. This adiabatic-invoking vibrational effect on electron momentum spectroscopy of ethylene (C2H4), ethane (C2H6) and methanol (CH3OH) was studied with quantum mechanical method. The results show that electron momentum spectroscopy of localized electrons, especially core electrons in axial symmetric geometry molecules can be affected unusually and strongly by several asymmetric vibrational modes.

  17. Surveying a complex potential energy landscape: Overcoming broken ergodicity using basin-sampling

    Science.gov (United States)

    Wales, David J.

    2013-10-01

    A new basin-sampling scheme is introduced to obtain equilibrium thermodynamic properties by combining results from global optimisation and parallel tempering calculations. Regular minimisation is used to obtain a two-dimensional density of states. A model anharmonic form is optimised using a multihistogram approach for potential energy bins corresponding to local minima, connecting the results obtained for low and high temperatures. This procedure provides accurate densities of states and thermodynamic properties for benchmark atomic clusters exhibiting broken ergodicity. It can also be used to calculate the potential energy density of local minima for distinct permutation-inversion isomers and distinct structures.

  18. Spontaneously broken topological SL(5,R) gauge theory with standard gravity emerging

    Science.gov (United States)

    Mielke, Eckehard W.

    2011-02-01

    A completely metric-free sl(5,R) gauge framework is developed in four dimensions. After spontaneous symmetry breaking of the corresponding topological BF scheme, Einstein spaces with a tiny cosmological constant emerge, similarly as in (anti-)de Sitter gauge theories of gravity. The induced Λ is related to the scale of the symmetry breaking. A “background” metric surfaces from a Higgs-like mechanism. The finiteness of such a topological scheme converts into asymptotic safeness after quantization of the spontaneously broken model.

  19. Universality of radiative corrections to gauge couplings for strings with spontaneously broken supersymmetry

    CERN Document Server

    Florakis, Ioannis

    2015-01-01

    I review recent work on computing radiative corrections to non-abelian gauge couplings in four-dimensional heterotic vacua with spontaneously broken supersymmetry. The prototype models can be considered as K3 surfaces with additional Scherk-Schwarz fluxes inducing the spontaneous $\\mathcal{N}=2 \\to \\mathcal{N}=0$ breaking. Remarkably, although the gauge thresholds are no longer BPS protected and receive contributions also from the excitations of the RNS sector, their difference is still exactly computable and universal. Based on a talk presented at the DISCRETE 2014 conference at King's College London.

  20. Thermodynamic properties of the 2+1-dimensional Dirac fermions with broken time-reversal symmetry

    Science.gov (United States)

    Sharapov, S. G.

    2015-09-01

    We study the thermodynamic properties of the two-component 2+1-dimensional massive Dirac fermions in an external magnetic field. The broken time-reversal symmetry results in the presence of a linear in the magnetic field part of the thermodynamic potential, while in the famous problem of Landau diamagnetism the leading field dependent term is quadratic in the field. Accordingly, the leading term of the explicitly calculated magnetization is anomalous, viz it is independent of the strength of the magnetic field. The Středa formula is employed to describe how the anomalous magnetization is related to the anomalous Hall effect.

  1. Tirofiban in Takotsubo cardiomyopathy. Atypical broken heart syndrome with extremely fast recovery: a case report.

    Science.gov (United States)

    Akpinar, I; Salihoglu, Y S; Sayin, M R; Elri, T; Karabag, T; Dogan, S M; Aydin, M

    2013-02-01

    Takotsubo cardiomyopathy, also known as broken heart syndrome, is similar to acute coronary syndrome. The absence of significant stenosis on coronary angiography and spontaneous improvement of ventricular akinesia are very important features that distinguish this syndrome from acute coronary syndromes. Despite the fact that ST segment elevations are typically encountered, atypical presentation without ECG changes should be kept in mind. We herein report the case of a 61-year-old woman who presented with mid-apical left ventricular akinesia resolving within 24 h.

  2. Neutrino Masses with Inverse Hierarchy from Broken $L_{e}-L_{\\mu}-L_{\\tau}$: a Reappraisal

    CERN Document Server

    Altarelli, Guido; Altarelli, Guido; Franceschini, Roberto

    2006-01-01

    We discuss a class of models of neutrino masses and mixings with inverse hierarchy based on a broken U(1)_F flavour symmetry with charge L_e-L_\\mu-L_\\tau. The symmetry breaking sector receives separate contributions from flavon vev breaking terms and from soft mass breaking in the right handed Majorana sector. The model is able to reproduce in a natural way all observed features of the charged lepton mass spectrum and of neutrino masses and mixings (even with arbitrarily small \\theta_{13}), with the exception of a moderate fine tuning which is needed to accomodate the observed small value of r = Delta m^2_{sol} / Delta m^2_{atm}.

  3. Migration of broken hypodermic needle in the cervical muscles of dog

    Directory of Open Access Journals (Sweden)

    A.K.Sharma

    Full Text Available A Spitz bitch of 21/2 years of age was presented in the Department with complaint of anorexia, depression, frothy salivation and distress. However, history of vomition was lacking. The bitch evinced pain on palpation of cervical region. The Radiograph revealed the presence of a linear radioopaque body lodged in the cervical musculature just above the vertebrae. A broken hypodermic needle was retrieved from the cervical musculature just above the last cervical vertebrae, following faulty mode of injection in the cervical region which is not advocated for pets. [Veterinary World 2010; 3(10.000: 476-476

  4. 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

    The data-based machine learning is an important aspect of modern intelligent technology, while statistical learning theory (SLT) is a new tool that studies the machine learning methods in the case of a small number of samples. As a common learning method, support vector machine (SVM) is derived...... 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...

  5. Fine-tuning problem in renormalized perturbation theory: Spontaneously-broken gauge models

    Energy Technology Data Exchange (ETDEWEB)

    Foda, O.E. (Purdue Univ., Lafayette, IN (USA). Dept. of Physics)

    1983-04-28

    We study the stability of tree-level gauge hierarchies at higher orders in renormalized perturbation theory, in a model with spontaneously-broken gauge symmetries. We confirm previous results indicating that if the model is renormalized using BPHZ, then the tree-level hierarchy is not upset by the radiative corrections. Consequently, no fine-tuning of the initial parameters is required to maintain it, in contrast to the result obtained using Dimensional Renormalization. This verifies the conclusion that the need for fine-tuning, when it arises, is an artifact of the application of a certain class of renormalization schemes.

  6. ‘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

  7. Rumors and gossip in radiology.

    Science.gov (United States)

    Dowd, S B; Davidhizar, R

    1997-01-01

    Rumors and gossip have long been popular topics in literature. Social scientists have even studied the topic and defined four main types of rumor: wish rumors; fear or bogey rumors; wedge-driving or aggressive rumors; and anticipatory rumors. In general, people believe rumor and gossip are synonymous. Rumormongering--the spreading of rumors--occurs among all cultures and types of people. Both men and women gossip and women's gossip is not more vindicative than men's, as is often thought. With such new means of communication as the Internet, transmitting rumor is possible beyond the traditional oral and written forms. Rumor is spread in both the higher and lower levels of an organization. Typically, disproving a rumor is more difficult than proving a rumor. The financial impact of a rumor must be considered also. If people believe, for example, that a radiology department does not have its act together or offers poor customer service, the department may lose revenue because people have lost confidence in it. Originally, the word gossip had positive implications. It referred to a family friend or the woman who delivered a child and announced the event to the community. Because well-intentioned gossip often turns into a damaging story, various approaches for stopping rumors have been identified. They include analyzing the grapevine, identifying the habitual spreaders of rumor and keeping employees informed. In most cases, a person of authority who provides facts can stop or at least slow down rumors spreading at the employee level.

  8. 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.

  9. 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.

  10. 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. (c) RSNA, 2008.

  11. Radiologic findings of granulomatous mastitis

    Energy Technology Data Exchange (ETDEWEB)

    Kim, Tae Gyu; Kim, Ji Young; Jeong, Myeong Ja; Kim, Jae Hyung; Kim, Soung Hee; Kim, Soo Hyun; Jun, Woo Sun; Park, Kyeong Mee; Han, Se Hwan [Paik Hospital, Inje University College of Medicine, Seoul (Korea, Republic of)

    2008-08-15

    The describe the radiologic findings of granulomatous mastitis of the breast. This study included 19 patients (age range: 22 to 56 years; mean 37 years) with 22 lesions that were pathologically confirmed as having granulomatous mastitis. All the patients underwent a breast ultrasonography and 13 patients underwent a mammography. The results of the mammography revealed focal asymmetry (n = 9), multiple ill-defined isodense nodules (n 2), ill-defined nodular density on craniocaudal view (n = 1), and unremarkable finding (n = 1). The sonographic findings included continuous or discontinuous multiple tubular and nodular low echoic lesions (n = 7), ill-defined heterogeneously low echoic lesion (n = 5), irregular-shaped, ill-defined low echoic mass (n = 4), fluid collection with internal floating materials suggesting the presence of an abscess (n = 4), ill-defined heterogeneously low echoic lesion and abscess (n = 1), and multiple ill-defined nodules (n = 1). In the case of granulomatous mastitis, the mammography results indicate a lack of specificity between normal findings and focal asymmetry. The sonographic findings indicate that ill-defined heterogeneously low echoic lesions or irregular shaped, ill-defined low echoic masses are difficult to differentiate from breast cancer. The sonographic findings of abscesses indicate a difficulty in differentiating them from cases of pyogenic mastitis. However, multiple tubular and nodular low echoic lesions, especially with a continuous appearance, should point to granulomatous mastitis, and is helpful in its differential diagnosis and treatment.

  12. Contained radiological analytical chemistry module

    Science.gov (United States)

    Barney, David M.

    1989-01-01

    A system which provides analytical determination of a plurality of water chemistry parameters with respect to water samples subject to radiological contamination. The system includes a water sample analyzer disposed within a containment and comprising a sampling section for providing predetermined volumes of samples for analysis; a flow control section for controlling the flow through the system; and a gas analysis section for analyzing samples provided by the sampling system. The sampling section includes a controllable multiple port valve for, in one position, metering out sample of a predetermined volume and for, in a second position, delivering the material sample for analysis. The flow control section includes a regulator valve for reducing the pressure in a portion of the system to provide a low pressure region, and measurement devices located in the low pressure region for measuring sample parameters such as pH and conductivity, at low pressure. The gas analysis section which is of independent utility provides for isolating a small water sample and extracting the dissolved gases therefrom into a small expansion volume wherein the gas pressure and thermoconductivity of the extracted gas are measured.

  13. Association between medical school radiology curricula and application rates to US radiology residency programs.

    Science.gov (United States)

    Kapoor, Neena; Smith, Stacy E

    2014-11-01

    Data are limited on how radiology curricula vary across US medical schools and the association between characteristics of these curricula and application rates to radiology residency programs. The purpose of this study was to gather more information about medical school radiology curricula and to determine the association between radiology education and application rates to radiology residency programs. An anonymous web-based survey was e-mailed to residency program directors affiliated with 129 accredited US medical schools. Residency program directors were instructed to forward the survey to a radiology clerkship director or complete the survey themselves. Electronic Residency Application Service data were also obtained for 122 participating medical schools. Fifty-five of 122 schools responded, a response rate of 45%. The majority of medical schools (76%) had a dedicated radiology curriculum, which was most often offered in the third and fourth years. The majority (87%) of schools integrated radiology education into other courses throughout all 4 years. The application data revealed that application rates were similar across schools, ranging from 6% to 8%. Applications rates did not significantly vary across several characteristics of educational curricula. Although schools vary in the characteristics of radiology education, application rates to radiology residency programs are similar across schools and are not associated with specific characteristics of these educational programs. This lack of an association may be explained by universal exposure of medical students to radiology curricula and the fact that a career choice is a complex process that involves multiple factors. Copyright © 2014 American College of Radiology. Published by Elsevier Inc. All rights reserved.

  14. 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.

  15. 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.

  16. 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.)

  17. Improving efficiency in the radiology department

    Energy Technology Data Exchange (ETDEWEB)

    Towbin, Alexander J.; Perry, Laurie A. [Cincinnati Children' s Hospital Medical Center, Department of Radiology, Cincinnati, OH (United States); Larson, David B. [Stanford University School of Medicine, Department of Radiology, Stanford, CA (United States)

    2017-06-15

    The modern radiology department is built around the flow of information. Ordering providers request imaging studies to be performed, technologists complete the work required to perform the imaging studies, and radiologists interpret and report on the imaging findings. As each of these steps is performed, data flow between multiple information systems, most notably the radiology information system (RIS), the picture archiving and communication system (PACS) and the voice dictation system. Even though data flow relatively seamlessly, the majority of our systems and processes are inefficient. The purpose of this article is to describe the radiology value stream and describe how radiology informaticists in one department have worked to improve the efficiency of the value stream at each step. Through these examples, we identify and describe several themes that we believe have been crucial to our success. (orig.)

  18. 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.

  19. 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.

  20. Leadership and management in quality radiology

    Science.gov (United States)

    2007-01-01

    The practice of medical imaging and interventional radiology are undergoing rapid change in recent years due to technological advances, workload escalation, workforce shortage, globalisation, corporatisation, commercialisation and commoditisation of healthcare. These professional and economical changes are challenging the established norm but may bring new opportunities. There is an increasing awareness of and interest in the quality of care and patient safety in medical imaging and interventional radiology. Among the professional organisations, a range of quality systems are available to address individual, facility and system needs. To manage the limited resources successfully, radiologists and professional organisations must be leaders and champion for the cause of quality care and patient safety. Close collaboration with other stakeholders towards the development and management of proactive, long-term, system-based strategies and infrastructures will underpin a sustainable future in quality radiology. The International Radiology Quality Network can play a useful facilitating role in this worthwhile but challenging endeavour. PMID:21614284

  1. Radiology Teaching Files on the Internet

    Energy Technology Data Exchange (ETDEWEB)

    Lim, Eun Chung; Kim, Eun Kyung [Dept. of Oral and Maxillofacial Radiology, College of Dentistry, DonKook University, Seoul (Korea, Republic of)

    1996-08-15

    There is increasing attention about radiology teaching files on the Internet in the field of diagnostic radiology. The purpose of this study was to aid in the creation of new radiology teaching file by analysing the present radiology teaching file sites on the Internet with many aspects and evaluating images on those sites, using Macintosh II ci compute r, 28.8kbps TelePort Fax/Modem, Netscape Navigator 2.0 software. The results were as follow : 1. Analysis of radiology teaching file sites (1) Country distribution was the highest in USA (57.5%). (2) Average number of cases was 186 cases and radiology teaching file sites with search engine were 9 sites (22.5%). (3) At the method of case arrangement, anatomic area type and diagnosis type were found at the 10 sites (25%) each, question and answer type was found at the 9 sites (22.5%). (4) Radiology teaching file sites with oro-maxillofacial disorder were 9 sites (22.5%). (5) At the image format, GIF format was found at the 14 sites (35%), and JPEG format found at the 14 sites (35%). (6) Created year was the highest in 1995 (43.7%). (7) Continuing case upload was found at the 35 sites (87.5%). 2. Evaluation of images on the radiology teaching files (1) Average file size of GIF format (71 Kbyte) was greater than that of JPEG format (24 Kbyte). (P<0.001) (2) Image quality of GIF format was better than that of JPEG format. (P<0.001)

  2. Applications of decision analysis in diagnostic radiology

    OpenAIRE

    Hunink, Myriam

    1989-01-01

    textabstractThe subjects of this thesis are decision analysis and receiver operating characteristic (ROC) methodology applied to radiological problems. This thesis is intended for those interested in applying decision analytical techniques in diagnostic radiology, and in medicine in general. Chapter II deals with the theory of decision trees and Markov processes. The basic concepts are briefly explained and a few selected topics are discussed in more detaiL Chapter III describes a decision mo...

  3. Radiological rickets in extremely low birthweight infants

    Energy Technology Data Exchange (ETDEWEB)

    Lyon, A.J.; McIntosh, N.; Wheeler, K.; Williams, J.E.

    1987-01-01

    Forty-eight infants of birthweight less than 1000 grams who survived for more than 28 days, had wrist X-rays to prospectively determine the incidence of radiological rickets. Twelve infants (25%) had normal X-rays throughout, 10 infants (21%) showed osteopoenia and 26 infants (54%) had classical changes or rickets of which 8 (17% of the total) had spontaneous fractures. There was poor correlation between peak values of serum alkaline phosphatase and the radiological changes.

  4. 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.

  5. Stress management for the radiologic technologist.

    Science.gov (United States)

    Romano, Jeannine M

    2012-01-01

    Changes in technology in the radiology department and an emphasis on multitasking can lead to stress and burnout, along with the potential for medical errors. A shift in viewpoint and exercises in self-evaluation can help radiologic technologists learn to manage change in a positive manner. Learning to approach change through a series of transitions and positive steps can reduce stress at work and at home.

  6. 21 CFR 892.1940 - Radiologic quality assurance instrument.

    Science.gov (United States)

    2010-04-01

    ... (CONTINUED) MEDICAL DEVICES RADIOLOGY DEVICES Diagnostic Devices § 892.1940 Radiologic quality assurance instrument. (a) Identification. A radiologic quality assurance instrument is a device intended for medical purposes to measure a physical characteristic associated with another radiologic device. (b) Classification...

  7. Spectrum of diagnostic errors in radiology.

    Science.gov (United States)

    Pinto, Antonio; Brunese, Luca

    2010-10-28

    Diagnostic errors are important in all branches of medicine because they are an indication of poor patient care. Since the early 1970s, physicians have been subjected to an increasing number of medical malpractice claims. Radiology is one of the specialties most liable to claims of medical negligence. Most often, a plaintiff's complaint against a radiologist will focus on a failure to diagnose. The etiology of radiological error is multi-factorial. Errors fall into recurrent patterns. Errors arise from poor technique, failures of perception, lack of knowledge and misjudgments. The work of diagnostic radiology consists of the complete detection of all abnormalities in an imaging examination and their accurate diagnosis. Every radiologist should understand the sources of error in diagnostic radiology as well as the elements of negligence that form the basis of malpractice litigation. Error traps need to be uncovered and highlighted, in order to prevent repetition of the same mistakes. This article focuses on the spectrum of diagnostic errors in radiology, including a classification of the errors, and stresses the malpractice issues in mammography, chest radiology and obstetric sonography. Missed fractures in emergency and communication issues between radiologists and physicians are also discussed.

  8. 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.

  9. Advanced Model of Squirrel Cage Induction Machine for Broken Rotor Bars Fault Using Multi Indicators

    Directory of Open Access Journals (Sweden)

    Ilias Ouachtouk

    2016-01-01

    Full Text Available Squirrel cage induction machine are the most commonly used electrical drives, but like any other machine, they are vulnerable to faults. Among the widespread failures of the induction machine there are rotor faults. This paper focuses on the detection of broken rotor bars fault using multi-indicator. However, diagnostics of asynchronous machine rotor faults can be accomplished by analysing the anomalies of machine local variable such as torque, magnetic flux, stator current and neutral voltage signature analysis. The aim of this research is to summarize the existing models and to develop new models of squirrel cage induction motors with consideration of the neutral voltage and to study the effect of broken rotor bars on the different electrical quantities such as the park currents, torque, stator currents and neutral voltage. The performance of the model was assessed by comparing the simulation and experimental results. The obtained results show the effectiveness of the model, and allow detection and diagnosis of these defects.

  10. Processing and characterization of extruded breakfast meal formulated with broken rice and bean flour

    Directory of Open Access Journals (Sweden)

    Ana Vânia Carvalho

    2012-09-01

    Full Text Available The objective of this work was to develop an extruded breakfast product containing broken rice and split old beans and to verify the influence of the extrusion process on their physicochemical, technological, and sensory characteristic. The final product had a protein content of 9.9 g.100 g-1, and therefore it can be considered a good source of proteins for children and teenagers. The dietary fiber content of the final edible product was 3.71 g.100 g-1. Therefore, the breakfast meal may be considered as a source of dietary fiber according to Brazilian law . As for the technological properties, the extruded product presented an expansion index of 8.89 and apparent density of 0.25 g.cm-3. With regard to the sensory analysis, the acceptance average was ranked between 6.8 and 7.7, corresponding to the categories "liked slightly" and "liked very much". With regard to purchase intention, 79% of the panelists said they would certainly or possibly purchase the product. Broken rice and split old beans are interesting alternatives for the elaboration of extruded breakfast products presenting good nutritional, technological, and sensory qualities.

  11. Surgical treatment of a broken neuroplasty catheter in the epidural space: a case report.

    Science.gov (United States)

    Kim, Tae Hyun; Shin, Jun Jae; Lee, Woo Yong

    2016-10-06

    Percutaneous epidural neuroplasty with a Racz catheter is widely used to treat radicular pain caused by spinal stenosis or a herniated intervertebral disc. The breakage or shearing of an epidural catheter, particularly a percutaneous epidural neuroplasty catheter, is reported as a rare complication. There has been a controversy over whether surgical removal of a shorn epidural catheter is needed. Until now, only three cases related to sheared Racz neuroplasty catheters have been reported. We report a case of a neuroplasty catheter which completely broke when it was inserted into the epidural space, and compressed root symptoms were exacerbated by the broken catheter. A 68-year-old Asian man with leg pain and lower back pain caused by lumbar vertebral body 4 to lumbar vertebral body 5 intervertebral disc herniation and stenosis underwent percutaneous epidural neuroplasty. During the procedure, the epidural neuroplasty catheter was trapped in the left foraminal portion and broke. Our patient complained of left-side leg pain and numbness. Surgery performed to remove the broken catheter led to complete resolution of his leg pain and numbness. We report a rare case of catheter breakage occurring during epidural neuroplasty. We suggest surgical removal because the implanted catheter can aggravate a patient's symptoms and lead to the development of neurologic deficits due to infection, fibrosis, or mechanical neural irritation.

  12. Ramanujan-type congruences for broken 2-diamond partitions modulo 3

    Science.gov (United States)

    Chen, William Y. C.; Fan, Anna R. B.; Yu, Rebecca T.

    2014-08-01

    The notion of broken $k$-diamond partitions was introduced by Andrews and Paule. Let $\\Delta_k(n)$ denote the number of broken k-diamond partitions of $n$. They also posed three conjectures on the congruences of $\\Delta_2(n)$ modulo 2, 5 and 25. Hirschhorn and sellers proved the conjectures for modulo 2, and Chan proved cases of modulo 5. For the case of modulo 3, Radu and Sellers obtained an infinite family of congruences for $\\Delta_2(n)$. In this paper, we obtain two infinite families of congruences for $\\Delta_2(n)$ modulo 3 based on a formula of Radu and Sellers, the 3-dissection formula of the generating function of triangular number due to Berndt, and the properties of the $U$-operator, the $V$-operator, the Hecke operator and the Hecke eigenform. For example, we find that $\\Delta_2(243n+142)\\equiv \\Delta_2(243n+223)\\equiv0\\pmod{3}$. The infinite family of Radu and Sellers and the two infinite families derived in this paper have two congruences in common, namely, $\\Delta_2(27n+16)\\equiv\\Delta_2(27n+25)\\equiv0 \\pmod{3}$.

  13. Esaki Diodes in van der Waals Heterojunctions with Broken-Gap Energy Band Alignment.

    Science.gov (United States)

    Yan, Rusen; Fathipour, Sara; Han, Yimo; Song, Bo; Xiao, Shudong; Li, Mingda; Ma, Nan; Protasenko, Vladimir; Muller, David A; Jena, Debdeep; Xing, Huili Grace

    2015-09-09

    van der Waals (vdW) heterojunctions composed of two-dimensional (2D) layered materials are emerging as a solid-state materials family that exhibits novel physics phenomena that can power a range of electronic and photonic applications. Here, we present the first demonstration of an important building block in vdW solids: room temperature Esaki tunnel diodes. The Esaki diodes were realized in vdW heterostructures made of black phosphorus (BP) and tin diselenide (SnSe2), two layered semiconductors that possess a broken-gap energy band offset. The presence of a thin insulating barrier between BP and SnSe2 enabled the observation of a prominent negative differential resistance (NDR) region in the forward-bias current-voltage characteristics, with a peak to valley ratio of 1.8 at 300 K and 2.8 at 80 K. A weak temperature dependence of the NDR indicates electron tunneling being the dominant transport mechanism, and a theoretical model shows excellent agreement with the experimental results. Furthermore, the broken-gap band alignment is confirmed by the junction photoresponse, and the phosphorus double planes in a single layer of BP are resolved in transmission electron microscopy (TEM) for the first time. Our results represent a significant advance in the fundamental understanding of vdW heterojunctions and broaden the potential applications of 2D layered materials.

  14. Diagnosis of broken-bars fault in induction machines using higher order spectral analysis.

    Science.gov (United States)

    Saidi, L; Fnaiech, F; Henao, H; Capolino, G-A; Cirrincione, G

    2013-01-01

    Detection and identification of induction machine faults through the stator current signal using higher order spectra analysis is presented. This technique is known as motor current signature analysis (MCSA). This paper proposes two higher order spectra techniques, namely the power spectrum and the slices of bi-spectrum used for the analysis of induction machine stator current leading to the detection of electrical failures within the rotor cage. The method has been tested by using both healthy and broken rotor bars cases for an 18.5 kW-220 V/380 V-50 Hz-2 pair of poles induction motor under different load conditions. Experimental signals have been analyzed highlighting that bi-spectrum results show their superiority in the accurate detection of rotor broken bars. Even when the induction machine is rotating at a low level of shaft load (no-load condition), the rotor fault detection is efficient. We will also demonstrate through the analysis and experimental verification, that our proposed proposed-method has better detection performance in terms of receiver operation characteristics (ROC) curves and precision-recall graph. Copyright © 2012 ISA. Published by Elsevier Ltd. All rights reserved.

  15. Maximum likelihood estimation of the broken power law spectral parameters with detector design applications

    Science.gov (United States)

    Howell, Leonard W.

    2002-08-01

    The method of Maximum Likelihood (ML) is used to estimate the spectral parameters of an assumed broken power law energy spectrum from simulated detector responses. This methodology, which requires the complete specificity of all cosmic-ray detector design parameters, is shown to provide approximately unbiased, minimum variance, and normally distributed spectra information for events detected by an instrument having a wide range of commonly used detector response functions. The ML procedure, coupled with the simulated performance of a proposed space-based detector and its planned life cycle, has proved to be of significant value in the design phase of a new science instrument. The procedure helped make important trade studies in design parameters as a function of the science objectives, which is particularly important for space-based detectors where physical parameters, such as dimension and weight, impose rigorous practical limits to the design envelope. This ML methodology is then generalized to estimate broken power law spectral parameters from real cosmic-ray data sets.

  16. Computer assisted tutoring in radiology

    Energy Technology Data Exchange (ETDEWEB)

    Jeffery, N

    1997-02-01

    The computer-based tutoring of visual concepts such as radiological images is a largely unexplored area. A review of the literature highlights limited use of computers as a means of radiological education, with the majority of systems being little more than hypermedia prototypes, on-line teaching files, and passive CD-Roms. Very few of the systems discussed in the research literature draw on the work from cognitive science and educational psychology for tutoring visual concepts. This thesis details and evaluates a method for indexing and retrieving images from large image databases via a cognitively informed graphical representation of visual concepts. This representation is derived using Multiple Correspondence Analysis from a statistical analysis of features present in the images. It is intended that this representation be used to assist in the computer based teaching of any discipline that requires the tutoring of visual concepts. The domain used as a test bed for this research is Magnetic Resonance Imaging in neuroradiology. Tutoring the interpretation of MR scans of the head represents a real practical problem due to the inherent complexity of the brain and variations in tissue contrast within image sequence and disease/pathology. The literature of concept categorisation and representation is critically reviewed to inform the design of a graphical representation of a concept (a pathology in the application domain). A specification for the design of an explicit representation of visual concepts is drawn from this literature review, together with methods of tutoring based around this model. A methodology for producing this representation is described, and implemented in the development of an overview plot for the concept of a disease of the brain, with associated statistical measures derived and operationalised for typicality and similarity of cases within a disease. These measures are precursors to the development of computer based tutoring strategies for image

  17. Radiological findings of congenital megacolon

    Energy Technology Data Exchange (ETDEWEB)

    Yeon, Kyung Mo; Chung, Sung Hoon; Park, Jae Hyung [College of Medicine, Seoul National University, Seoul (Korea, Republic of)

    1980-12-15

    Congenital megacolon, known as Hirschsprung's disease, is potentially lethal cogenital anomaly due to dangerous complications if diagnosis and treatment are delayed. Early diagnosis is important because immediate successful surgical control reduces mortality and morbidity of this infantile disease and barium enema study is the most important diagnostic tool. Authors analyzed clinical and radiological findings of 41 cases of confirmed congenital megacolon during December 1978 to July 1980 at Seoul National University Hospital. Majority of the cases are male and below one year old. Majority of the cases represent abdominal distension, chronic constipation relieved by enema, no passage of meconium within 24hrs, after birth, vomitting, defication difficulty and emaciation. Cases of showing exudative enteropathy complaints diarrhea, dehydration and melena. In simple abdomen film, 25 cases show moderate degree of abdominal distention and 10 cases show markedly distended abdomen. Most frequent segmental pattern is type C (26.8%) and type B is the next (24.4%), and type A occupy 14.6%. There are one case of jejunal aganglionosis and two cases of total colonic aganglionosis. Most frequent shape of transition zone is type II (34%), and type VI is the next (24%) and type IV occupy 17%. In 82% of the cases show hypertrophy of bowel wall of dilated segment, and 85% of above cases show findings of exudative enteropathy. In 73% of the cases show exudative enteropathy. Almost of cases showing markedly distended abdomen, also have moderate to marked degree of hypertrophy of bowel wall and findings of exudative enteropathy. Three cases were taken 24hrs. delay film, show retention of the main bulk of barium.

  18. 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

  19. Removal of a Broken Cannulated Intramedullary Nail: Review of the Literature and a Case Report of a New Technique

    Directory of Open Access Journals (Sweden)

    Amr A. Abdelgawad

    2013-01-01

    Full Text Available Nonunion of long bones fixed with nails may result in implant failure. Removal of a broken intramedullary nail may be a real challenge. Many methods have been described to allow for removal of the broken piece of the nail. In this paper, we are reviewing the different techniques to extract a broken nail, classifying them into different subsets, and describing a new technique that we used to remove a broken tibial nail with narrow canal. Eight different categories of implant removal methods were described, with different methods within each category. This classification is very comprehensive and was never described before. We described a new technique (hook captured in the medulla by flexible nail introduced from the locking hole which is a valuable technique in cases of nail of a small diameter where other methods cannot be used because of the narrow canal of the nail. Our eight categories for broken nail removal methods simplify the concepts of nail removal and allow the surgeon to better plan for the removal procedure.

  20. Evidence-based radiology: why and how?

    Energy Technology Data Exchange (ETDEWEB)

    Sardanelli, Francesco; Di Leo, Giovanni [Universita degli Studi di Milano, Dipartimento di Scienze Medico-Chirurgiche, Unita di Radiologia, IRCCS Policlinico San Donato, Via Morandi 30, San Donato Milanese, Milan (Italy); Hunink, Myriam G. [Erasmus University Medical Center, Department of Radiology, Rotterdam (Netherlands); Erasmus University Medical Center, Department of Epidemiology, Rotterdam (Netherlands); Harvard School of Public Health, Program for Health Decision Science, Boston, MA (United States); Gilbert, Fiona J. [University of Aberdeen, Aberdeen Biomedical Imaging Centre, Aberdeen (United Kingdom); Krestin, Gabriel P. [Erasmus University Medical Center, Department of Radiology, Rotterdam (Netherlands)

    2010-01-15

    To provide an overview of evidence-based medicine (EBM) in relation to radiology and to define a policy for adoption of this principle in the European radiological community. Starting from Sackett's definition of EBM we illustrate the top-down and bottom-up approaches to EBM as well as EBM's limitations. Delayed diffusion and peculiar features of evidence-based radiology (EBR) are defined with emphasis on the need to shift from the demonstration of the increasing ability to see more and better, to the demonstration of a significant change in treatment planning or, at best, of a significant gain in patient outcome. The ''as low as reasonably achievable'' (ALARA) principle is thought as a dimension of EBR while EBR is proposed as part of the core curriculum of radiology residency. Moreover, we describe the process of health technology assessment in radiology with reference to the six-level scale of hierarchy of studies on diagnostic tests, the main sources of bias in studies on diagnostic performance, and levels of evidence and degrees of recommendations according to the Centre for Evidence-Based Medicine (Oxford, UK) as well as the approach proposed by the GRADE working group. Problems and opportunities offered by evidence-based guidelines in radiology are considered. Finally, we suggest nine points to be actioned by the ESR in order to promote EBR. Radiology will benefit greatly from the improvement in practice that will result from adopting this more rigorous approach to all aspects of our work. (orig.)