WorldWideScience

Sample records for beams department head

  1. 2 February 2010-Bristol University Vice-Chancellor E. Thomas visiting SM18 hall with Beams Department Head P. Collier and Technology Department Senior Engineer R. Veness; signing the guest book with CERN Director-General R. Heuer.

    CERN Multimedia

    Maximilien Brice

    2010-01-01

    Caption for photograph 1239013 from left to right: University of Bristol and CMS Collaboration D. Newbold; University of Bristol Team Leader and LHCb Collaboration N. Brook; Bristol University Pro-Vice-Chancellor for Research G. Orpen; Beams Department Head P. Collier; Bristol University Vice-Chancellor E. Thomas;Technology Department Senior Engineer R. Veness in the SM18 hall.

  2. 18 January 2011 - The British Royal Academy of Engineering in the LHC tunnel with CMS Collaboration Spokesperson G. Tonelli and Beams Department Head P. Collier; in the CERN Control Centre with P. Collier and LHC superconducting magnet test hall with Technology Department Head F. Bordry.

    CERN Multimedia

    Jean-Claude Gadmer

    2011-01-01

    18 January 2011 - The British Royal Academy of Engineering in the LHC tunnel with CMS Collaboration Spokesperson G. Tonelli and Beams Department Head P. Collier; in the CERN Control Centre with P. Collier and LHC superconducting magnet test hall with Technology Department Head F. Bordry.

  3. 23rd June 2010 - University of Bristol Head of the Aerospace Engineering Department and Professor of Aerospace Dynamics N. Lieven visiting CERN control centre with Beams Department Head P. Collier, visiting the LHC superconducting magnet test hall with R. Veness and CMS control centre with Collaboration Spokesperson G. Tonelli and CMS User J. Goldstein.

    CERN Multimedia

    Jean-Claude Gadmer

    2010-01-01

    23rd June 2010 - University of Bristol Head of the Aerospace Engineering Department and Professor of Aerospace Dynamics N. Lieven visiting CERN control centre with Beams Department Head P. Collier, visiting the LHC superconducting magnet test hall with R. Veness and CMS control centre with Collaboration Spokesperson G. Tonelli and CMS User J. Goldstein.

  4. 9 April 2013 - Minister for Universities and Science United Kingdom of Great Britain and Northern Ireland D. Willetts in the ATLAS experimental cavern with ATLAS Collaboration Spokesperson D. Charlton and in the LHC tunnel at Point 1 with Beams Department Head P. Collier. Director for Accelerators and Technology S. Myers, Editor at the Communication Group K. Kahle and Beams Department Engineer R. Veness present.

    CERN Multimedia

    Jean-Claude Gadmer

    2013-01-01

    9 April 2013 - Minister for Universities and Science United Kingdom of Great Britain and Northern Ireland D. Willetts in the ATLAS experimental cavern with ATLAS Collaboration Spokesperson D. Charlton and in the LHC tunnel at Point 1 with Beams Department Head P. Collier. Director for Accelerators and Technology S. Myers, Editor at the Communication Group K. Kahle and Beams Department Engineer R. Veness present.

  5. 6 June 2012 - British Member of Parliament for Bromsgrove Parliamentary Private Secretary to George Osborne, Chancellor of the Exchequer S. Javid MP signing the guest book with Adviser E. Tsesmelis and visiting the LHC superconducting magnet test hall with Beams Department Head P. Collier, Head of Operations M. Lamont and Adviser E. Tsesmelis.

    CERN Multimedia

    Maximilien Brice

    2012-01-01

    6 June 2012 - British Member of Parliament for Bromsgrove Parliamentary Private Secretary to George Osborne, Chancellor of the Exchequer S. Javid MP signing the guest book with Adviser E. Tsesmelis and visiting the LHC superconducting magnet test hall with Beams Department Head P. Collier, Head of Operations M. Lamont and Adviser E. Tsesmelis.

  6. 1st September 2010 - British Vice-Chancellor, Liverpool University Sir Newby and Lady Newby signing the Guest Book with Head of International Relations F. Pauss; visiting the LHC superconducting magnet test hall with P. Cruikshank; accompanied by Beams Department Head P. Collier and Liverpool University T. Bowcock and P. Allport.

    CERN Multimedia

    Maximilien Brice

    2010-01-01

    1st September 2010 - British Vice-Chancellor, Liverpool University Sir Newby and Lady Newby signing the Guest Book with Head of International Relations F. Pauss; visiting the LHC superconducting magnet test hall with P. Cruikshank; accompanied by Beams Department Head P. Collier and Liverpool University T. Bowcock and P. Allport.

  7. Engineering science and mechanics department head named

    OpenAIRE

    Nystrom, Lynn A.

    2004-01-01

    Ishwar K. Puri, professor of mechanical engineering and executive associate dean of engineering at the University of Illinois at Chicago, will become the head of Virginia Tech•À_ó»s Department of Engineering Science and Mechanics Aug. 1.

  8. 7th February 2011 - Scottish Cabinet Secretary for Education and Lifelong Learning M. Russell MSP signing the guest book with Beams Department Head P. Collier and Adviser J. Ellis

    CERN Multimedia

    Maximilien Brice

    2011-01-01

    01-17:Scottish Cabinet Secretary for Education and Lifelong Learning M. Russell MSP signing the guest book with Beams Department Head P. Collier and Adviser J. Ellis 18-22: Teachers and Pupils signing the guest book 23-27: visiting the CERN control centre with P. Collier 28-32: visiting the LHCb underground area 33-74: visitng the ATLAS underground area Other members of the delegation: Chief Scientific Adviser to the Scottish Government and Chair in Molecular and Cell Biology at the University of Aberdeen A. Glover; Assistant Private Secretary M. Gallagher; Associate Director Institute for Gravitational Research, University of Glasgow J.Hough.

  9. 23 April 2010 - Her Majesty’s Ambassador to Switzerland and Liechtenstein, United Kingdom of Great Britain and Northern Ireland, S. Gillett CMG CVO, accompanied by Beams Department Head P. Collier, visiting the ATLAS control room with Collaboration Deputy Spokesperson, University of Birmingham, D. Charlton and signing the guest book with Director for Research and Scientific Computing S. Bertolucci.

    CERN Multimedia

    Maximilien Brice

    2010-01-01

    23 April 2010 - Her Majesty’s Ambassador to Switzerland and Liechtenstein, United Kingdom of Great Britain and Northern Ireland, S. Gillett CMG CVO, accompanied by Beams Department Head P. Collier, visiting the ATLAS control room with Collaboration Deputy Spokesperson, University of Birmingham, D. Charlton and signing the guest book with Director for Research and Scientific Computing S. Bertolucci.

  10. 15 January 2010 - Vice-Chancellor & Chief Executive C. Snowden, University of Surrey, United Kingdom and Mrs Snowden visiting ALICE exhibition and experimental undeground area with Collabortion Spokesperson J. Schukraft and Beams Department Head P. Collier; Signature of the guest book with CERN Director-General R. Heuer.

    CERN Multimedia

    Maximilien Brice

    2010-01-01

    15 January 2010 - Vice-Chancellor & Chief Executive C. Snowden, University of Surrey, United Kingdom and Mrs Snowden visiting ALICE exhibition and experimental undeground area with Collabortion Spokesperson J. Schukraft and Beams Department Head P. Collier; Signature of the guest book with CERN Director-General R. Heuer.

  11. Anne-Sylvie Catherin, Head of the Human Resources Department

    CERN Multimedia

    2009-01-01

    Anne-Sylvie Catherin has been appointed Head of the Human Resources Department with effect from 1 August 2009. Mrs Catherin is a lawyer specialized in International Administration and joined CERN in 1996 as legal advisor within the Office of the HR Department Head. After having been promoted to the position of Group Leader responsible for social and statutory conditions in 2000, Mrs Catherin was appointed Deputy of the Head of the Human Resources Department and Group Leader responsible for Strategy, Management and Development from 2005 to date. Since 2005, she has also served as a member of CCP and TREF. In the execution of her mandate as Deputy HR Department Head, Mrs Catherin closely assisted the HR Department Head in the organization of the Department and in devising new HR policies and strategies. She played an instrumental role in the last five-yearly review and in the revision of the Staff Rules and Regulations.

  12. Barbara Ryder to head Department of Computer Science

    OpenAIRE

    Daniilidi, Christina

    2008-01-01

    Barbara G. Ryder, professor of computer science at Rutgers, The State University of New Jersey, will become the computer science department head at Virginia Tech, starting in fall 2008. She is the first woman to serve as a department head in the history of the nationally ranked College of Engineering.

  13. Progress with Tevatron Electron Lens Head-On Beam-Beam Compensation

    International Nuclear Information System (INIS)

    Tevatron electron lenses have been successfully used to mitigate bunch-to-bunch differences caused by longrange beam-beam interactions. For this purpose, the electron beam with uniform transverse density distribution was used. Another planned application of the electron lens is the suppression of tune spread due to head-on beam-beam collisions. For this purpose, the transverse distribution of the E- beam must be matched to that of the antiproton beam. In 2009, the Gaussian profile electron gun was installed in one of the Tevatron electron lenses. We report on the first experiments with non-linear beam-beam compensation. Discussed topics include measurement and control of the betatron tune spread, importance of the beam alignment and stability, and effect of electron lens on the antiproton beam lifetime.

  14. Lattice design for head-on beam-beam compensation at RHIC

    Energy Technology Data Exchange (ETDEWEB)

    Montag, C.

    2011-03-28

    Electron lenses for head-on beam-beam compensation will be installed in IP 10 at RHIC. Compensation of the beam-beam effect experienced at IP 8 requires betatron phase advances of {Delta}{psi} = k {center_dot} {pi} between the proton-proton interaction point at IP 8, and the electron lens at IP 10. This paper describes the lattice solutions for both the BLUE and the YELLOW ring to achieve this goal.

  15. Model of an Ideal Head of the Personnel Department

    OpenAIRE

    Tsyurko Inna A.

    2013-01-01

    The article develops a model of the head of the personnel department, which aims at the ideal one by the classification property "orientation at the work with personnel and orientation at realisation of the strategy of efficient enterprise management". When building the model of the "ideal head" of the personnel department, the article applied a competency approach with the use of the 20 dimensions competency model. Using the method of questioning the personnel department employees, the artic...

  16. Former Virginia Tech Aerospace and Ocean Engineering Department Head Dies

    OpenAIRE

    Gilbert, Karen

    2003-01-01

    James B. Eades, Jr., retired aerospace research scientist from Bluefield, W. Wa., and former professor and department head of aerospace and ocean engineering at Virginia Tech, died Dec. 14 at Veteran's Hospital in Washington, D.C. He was 80.

  17. Department head appointed for Hospitality and Tourism Management

    OpenAIRE

    Ho, Sookhan

    2004-01-01

    James R. Lang, of Blacksburg, professor of management and Strickler Professor of Entrepreneurial Studies at Virginia Tech•À_ó»s Pamplin College of Business, has been appointed interim head of the Department of Hospitality and Tourism Management.

  18. Simulation of Head-on Beam-Beam Limitations in Future High Energy Colliders

    CERN Document Server

    Buffat, Xavier; Florio, Adrien; Pieloni, Tatiana; Tambasco, Claudia

    2016-01-01

    The Future Circular Hadron Collider (FCC-hh) project calls for studies in a new regime of beam-beam interactions. While the emittance damping due to synchrotron radiation is still slower than in past or existing lepton colliders, it is significantly larger than in other hadron colliders. The slow reduction of the emittance is profitable for higher luminosity in term of transverse beam size at the interaction points and also to mitigate long-range beam-beam effects, potentially allowing for a reduction of the crossing angle between the beams during the operation. In such conditions, the strength of head-on beam-beam interactions increases, potentially limiting the beam brightness. 4D weak-strong and strong-strong simulations are performed in order to assess these limitations.

  19. 34 CFR 33.39 - Appeal to Department head.

    Science.gov (United States)

    2010-07-01

    ... 34 Education 1 2010-07-01 2010-07-01 false Appeal to Department head. 33.39 Section 33.39 Education Office of the Secretary, Department of Education PROGRAM FRAUD CIVIL REMEDIES ACT § 33.39 Appeal... circumstances causing the failure to raise the objection. (i) If any party demonstrates to the satisfaction...

  20. The Leadership Styles of the Heads of Physical Education Departments

    OpenAIRE

    Mehrali Hemmatinezhad; Seyed Mohammad Hossein Razavi; Farogh Fathi Kajal

    2013-01-01

    The purpose of this survey is to study the change-oriented, pragmatic, and neutered leadership styles of the heads of physical education departments in the province of Ardebil. 180 heads of sports commissions answered a multi-factor leadership questionnaire (MLQ). The multi-factor leadership questionnaire includes 41 questions covering three leadership styles of change-oriented, pragmatic, and neutered. The validity of questionnaire has been studied and verified through the corrective feedbac...

  1. Enrico Chiaveri, new Head of the Human Resources Department

    CERN Multimedia

    2005-01-01

    Enrico Chiaveri has been appointed Head of the Human Resources Department of with effect from 1st April 2005. A senior physicist, Dr Chiaveri joined CERN in 1973. During his career, he has performed various management roles, including that of Deputy Leader of the SPS/LEP Division, and has acquired extensive experience in human resources matters. Over the transition period up to 1st August 2005 he will gradually relinquish his current functions as Group Leader within the AB Department.

  2. Long-Range And Head-On Beam-Beam Compensation Studies in RHIC With Lessons for the LHC

    Energy Technology Data Exchange (ETDEWEB)

    Fischer, W.; Luo, Y.; Abreu, N.; Calaga, R.; Montag, C.; Robert-Demolaize, G.; /Brookhaven; Dorda, U.; Koutchouk, J.P.; Sterbini, G.; Zimmermann, F.; /CERN; Kim, H.J.; Sen, T.; Shiltsev, V.; Valishev, A.; /Fermilab; Qiang, J.; /LBL, Berkeley; Kabel, A.; /SLAC

    2011-11-28

    Long-range as well as head-on beam-beam effects are expected to limit the LHC performance with design parameters. They are are also important consideration for the LHC upgrades. To mitigate long-range effects, current carrying wires parallel to the beam were proposed. Two such wires are installed in RHIC where they allow studying the effect of strong long-range beam-beam effects, as well as the compensation of a single long-range interaction. The tests provide benchmark data for simulations and analytical treatments. Electron lenses were proposed for both RHIC and the LHC to reduce the head-on beam-beam effect. We present the experimental long-range beam-beam program at RHIC and report on head-on compensations studies based on simulations.

  3. Evaluation of Head Trauma Cases in the Emergency Department

    Directory of Open Access Journals (Sweden)

    Alim Cokuk

    2013-02-01

    Full Text Available Aim: In this study, we aimed to determine the epidemiological characteristics, morbidity and mortality rates of patients admitted to the emergency department with head trauma. Material and Methods: In this study, ambulatory and hospitalized patients over the age of 18 brought to the Emergency Department because of head trauma between 01.12.2009 - 31.12.2010 were analyzed retrospectively. Patient data were recorded to standard data entry form. SPSS 17.0 package program was used for statistical analysis of data. The statistical significance level of all tests was p <0.05. Results: 5200 patients were included in this study. The average age of the patients was 39.97 ± 16.66 years. 4682'si patients (90 % were discharged from the emergency department. The most common reason for admission to the emergency department was falls (41.81 % in the discharged patients. 518 (10 % patients were hospitalized. Gender of these patients was 110 female (21:24% and 408 male (78.76%. 256 patients (48.35% were injured as a result of a traffic accident. 201(38.8% of the cerebral CT were reported as normal and 89 (17.2% of the cerebral CT were reported as traumatic subarachnoid hemorrhage (SAH in hospitalized patients. The fracture of lumbar spine (12 % was detected as an additional pathological disease in patients. 75 patients hospitalized because of head trauma (14.5% had died (1.44 % of all patients. Cervical spine fracture was the most common (14 patients, 18.68 % additional pathology in patients who died. Thoracic trauma was detected as the second most common (13 patients, 17.33 % additional pathology. Conclusion: Most of the patients admitted to the emergency department with head injury had a minor trauma. Patients can be discharged from the emergency department after a thorough physical examination and simple medical intervention. Most of the head injury patients admitted to hospital were male. The most common reason of the patients with head injury admitted to

  4. The Leadership Styles of the Heads of Physical Education Departments

    Directory of Open Access Journals (Sweden)

    Mehrali Hemmatinezhad

    2013-12-01

    Full Text Available The purpose of this survey is to study the change-oriented, pragmatic, and neutered leadership styles of the heads of physical education departments in the province of Ardebil. 180 heads of sports commissions answered a multi-factor leadership questionnaire (MLQ. The multi-factor leadership questionnaire includes 41 questions covering three leadership styles of change-oriented, pragmatic, and neutered. The validity of questionnaire has been studied and verified through the corrective feedbacks by the management and programming teachers of physical education, and the stability of questionnaire was determined 86% using Cronbach's alpha. In order to analyze the data, the statistical tests of chi-square and Friedman and Bonferroni post hoc test were used at a significant level (P ≤ 0 / 05. The Results showed that there was a significant difference between the pragmatic, change-oriented, and neutered leadership styles of the heads of physical education departments. Also, there was a significant difference among the priorities of the leadership styles of heads of physical education department. And, the change-oriented leadership style was placed as the first priority, while the pragmatic and neutered styles were considered as next priorities. There are significant differences among the subscales of the change-oriented and pragmatic leadership styles of physical education administrators.

  5. Strategies for mitigating the ionization-induced beam head erosion problem in an electron-beam-driven plasma wakefield accelerator

    Science.gov (United States)

    An, W.; Zhou, M.; Vafaei-Najafabadi, N.; Marsh, K. A.; Clayton, C. E.; Joshi, C.; Mori, W. B.; Lu, W.; Adli, E.; Corde, S.; Litos, M.; Li, S.; Gessner, S.; Frederico, J.; Hogan, M. J.; Walz, D.; England, J.; Delahaye, J. P.; Muggli, P.

    2013-10-01

    Strategies for mitigating ionization-induced beam head erosion in an electron-beam-driven plasma wakefield accelerator (PWFA) are explored when the plasma and the wake are both formed by the transverse electric field of the beam itself. Beam head erosion can occur in a preformed plasma because of a lack of focusing force from the wake at the rising edge (head) of the beam due to the finite inertia of the electrons. When the plasma is produced by field ionization from the space charge field of the beam, the head erosion is significantly exacerbated due to the gradual recession (in the beam frame) of the 100% ionization contour. Beam particles in front of the ionization front cannot be focused (guided) causing them to expand as in vacuum. When they expand, the location of the ionization front recedes such that even more beam particles are completely unguided. Eventually this process terminates the wake formation prematurely, i.e., well before the beam is depleted of its energy. Ionization-induced head erosion can be mitigated by controlling the beam parameters (emittance, charge, and energy) and/or the plasma conditions. In this paper we explore how the latter can be optimized so as to extend the beam propagation distance and thereby increase the energy gain. In particular we show that, by using a combination of the alkali atoms of the lowest practical ionization potential (Cs) for plasma formation and a precursor laser pulse to generate a narrow plasma filament in front of the beam, the head erosion rate can be dramatically reduced. Simulation results show that in the upcoming “two-bunch PWFA experiments” on the FACET facility at SLAC national accelerator laboratory the energy gain of the trailing beam can be up to 10 times larger for the given parameters when employing these techniques. Comparison of the effect of beam head erosion in preformed and ionization produced plasmas is also presented.

  6. Hammer head beam solution for beam-to-column joints in seismic resistant building frames

    OpenAIRE

    Hoang, Long; Jaspart, Jean-Pierre; Demonceau, Jean-François

    2014-01-01

    This paper presents a research on an innovative stiffened extended end-plate joint, used to connect I-shaped beams to partially-encased composite wide flange columns. In the joint, T-shaped hammer heads cut from the same I-profiles than the beams are used, instead of using traditional haunches. At the joint level, the column web is strengthened by two lateral plates welded to the column flanges; these plates also reinforce the column flanges. This type of joint is proposed to use in the seism...

  7. Managerial competencies of head and department nurses in facultative hospital Brno Bohunice

    OpenAIRE

    Tomáš Kotrba

    2009-01-01

    Head and department nurses were the target groups of this research in the Faculty Hospital, Brno. This paper deals with their managerial competencies. 846 respondents participated in a questionnaire research covering 724 nurses, 99 department nurses and 23 head nurses. This research shows that informal relationships predominate in the Hospital and it is based on the democratic managerial style of department and head nurses. Nurses in management positions are quite satisfied with their manager...

  8. Multi-beam Laser Doppler Vibrometer with fiber sensing head

    Science.gov (United States)

    Phua, P. B.; Fu, Y.; Guo, M.; Liu, H.

    2012-06-01

    Laser Doppler vibrometry (LDV) is a well known technique to measure the motions, vibrations and mode shapes of structures and machine components. Photodetector-based LDV can only offer a point-wise measurement. However, it is possible to scan the laser beam to build up a vibrometric image. These scanning laser Doppler vibrometers (SLDV) assume that the measurement conditions remain invariant while multiple and identical, sequential measurements are performed. This assumption makes SLDVs impractical to do measurement on transient events. In this paper, we introduce a new method of generating multiple laser beams with different frequency shifts. The laser beams are projected on different points, and the reflected beams interfere with a common reference beam. The cross-talk among object beams can be bypassed with a proper selection of frequency shifts. A simultaneous vibration measurement on multiple points is realized using a single photodetector. Based on the proposed spatial-encoding technology, a self-synchronized prototype of fiber-based multipoint laser Doppler vibrometer at 1550nm wavelength is developed. An addition red pilot laser is used for aiming purpose. It has the flexibility to measure the vibration of different points on various surfaces. The prototype is used to measure the vibration of different points on a cantilever beam and a plate. The measured results match well with simulation results using finite element method (FEM).

  9. Stress in Academic Leadership: U.S. and Australian Department Chairs/Heads.

    Science.gov (United States)

    Wolverton, Mimi; Gmelch, Walter H.; Wolverton, Marvin L.; Sarros, James C.

    1999-01-01

    University department heads in the United States and Australia function under increased uncertainty and stress: diverse student populations; funding shortages; demands for quality; downsizing; balancing academic/administrative roles. Article examines environmental pressures on these administrators explores strategies department heads in the two…

  10. Using Groups to Change the Department Head Role: An Organization Development Case

    Science.gov (United States)

    LeBlanc, Sheila; London, Chad; Huisman, Jeroen

    2013-01-01

    This article provides a detailed description and analysis of how one Canadian institution used groups of department heads as change agents to address their most acute department head role tensions. It is demonstrated that this institution's change initiative aligned very closely to the recommendations proposed, in both the literature pertaining to…

  11. Fundamental beam-beam limit from head-on interaction in the Large Hadron Collider

    Science.gov (United States)

    Ohmi, Kazuhito; Zimmermann, Frank

    2015-12-01

    The beam-beam limit at hadron colliders manifests itself in the form of degraded luminosity lifetime and/or reduced beam lifetime. In particular, for increasing beam intensity, the nonlinear beam-beam force causes incoherent emittance growth, while the (linear) coupling force between the two colliding beams can result in coherent beam-beam instabilities. These phenomena may be enhanced (or suppressed) by lattice errors, external noise, and other perturbations. We investigate the luminosity degradation caused both by incoherent emittance growth and by coherent beam-beam instability. The resulting beam-beam limit for an ideal machine and the of question how it is affected by some of the aforementioned errors are discussed in theory and simulation.

  12. Head and Neck Cancer Treatment with Particle Beam Therapy

    Directory of Open Access Journals (Sweden)

    Mehrzad Zargarzadeh

    2013-01-01

    Full Text Available In this century, cancer incidence has become one of the most significant problems concerning human. Conventional radiotherapy damage healthy tissue and in some cases may cause new primary cancers. This problem can be partially solved by hadron therapy which would be more effective and less harmful compared to other forms of radiotherapies used to treat some cancers. Although carbon ion and proton therapy both are effective treatments, they have serious differences which are mentioned in this paper and compared between the two methods. Furthermore, various treatments have been performed on head and neck cancer with hadrons so far will be discussed.

  13. Promoting Gender Equity in Academic Departments: a Study of Department Heads in Top-Ranked Chemistry Departments

    Science.gov (United States)

    Stockard, Jean; Greene, Jessica; Lewis, Priscilla; Richmond, Geraldine

    Although the proportion of doctoral degrees in chemistry that have gone to women has increased markedly over the past few decades, the representation of women among higher education faculty has not increased at the same rate. This paper reports the results of a systematic effort to change this pattern by increasing the commitment of department heads in leading departments to the hiring and support of women faculty. Results indicate that participants in a carefully planned intervention changed their attitudes regarding reasons underlying women's underrepresentation and barriers to their progress in the field from pre- to postworkshop. Participants also reported commitment to change immediately after the event and engaging in a number of specific change efforts in the following months. While the quality of these change efforts was not related to changes in attitudes, those with fewer women in their department were more likely to report more fully on change efforts.

  14. SU-E-I-11: A New Cone-Beam CT System for Bedside Head Imaging

    International Nuclear Information System (INIS)

    Purpose: To design and develop a new mobile cone-beam CT (CBCT) system for head imaging with good soft-tissue visibility, to be used bedside in ICU and neurosurgery department to monitor treatment and operation outcome in brain patients. Methods: The imaging chain consists of a 30cmx25cm amorphous silicon flat panel detector and a pulsed, stationary anode monoblock x-ray source of 100kVp at a maximal tube current of 10mA. The detector and source are supported on motorized mechanisms to provide detector lateral shift and source angular tilt, enabling a centered digital radiographic imaging mode and half-fan CBCT, while maximizing the use of the x-ray field and keep the source to detector distance short. A focused linear anti-scatter grid is mounted on the detector, and commercial software with scatter and other corrective algorithms is used for data processing and image reconstruction. The gantry rotates around a horizontal axis, and is able to adjust its height for different patient table positions. Cables are routed through a custom protective sleeve over a large bore with an in-plane twister band, facilitating single 360-degree rotation without a slip-ring at a speed up to 5 seconds per rotation. A UPS provides about 10 minutes of operation off the battery when unplugged. The gantry is on locked casters, whose brake is control by two push handles on both sides for easy reposition. The entire system is designed to have a light weight and a compact size for excellent maneuverability. Results: System design is complete and main imaging components are tested. Initial results will be presented and discussed later in the presentation. Conclusion: A new mobile CBCT system for head imaging is being developed. With its compact size, a large bore, and quality design, it is expected to be a useful imaging tool for bedside uses. The work is supported by a grant from Chinese Academy of Sciences

  15. SU-E-I-11: A New Cone-Beam CT System for Bedside Head Imaging

    Energy Technology Data Exchange (ETDEWEB)

    Sun, H; Zeng, W; Xu, P; Wang, Z; Xing, X; Sun, M [Suzhou Institute of Biomedical Engineering and Technology, Chinese Academy of Sciences, Jiangsu (China)

    2015-06-15

    Purpose: To design and develop a new mobile cone-beam CT (CBCT) system for head imaging with good soft-tissue visibility, to be used bedside in ICU and neurosurgery department to monitor treatment and operation outcome in brain patients. Methods: The imaging chain consists of a 30cmx25cm amorphous silicon flat panel detector and a pulsed, stationary anode monoblock x-ray source of 100kVp at a maximal tube current of 10mA. The detector and source are supported on motorized mechanisms to provide detector lateral shift and source angular tilt, enabling a centered digital radiographic imaging mode and half-fan CBCT, while maximizing the use of the x-ray field and keep the source to detector distance short. A focused linear anti-scatter grid is mounted on the detector, and commercial software with scatter and other corrective algorithms is used for data processing and image reconstruction. The gantry rotates around a horizontal axis, and is able to adjust its height for different patient table positions. Cables are routed through a custom protective sleeve over a large bore with an in-plane twister band, facilitating single 360-degree rotation without a slip-ring at a speed up to 5 seconds per rotation. A UPS provides about 10 minutes of operation off the battery when unplugged. The gantry is on locked casters, whose brake is control by two push handles on both sides for easy reposition. The entire system is designed to have a light weight and a compact size for excellent maneuverability. Results: System design is complete and main imaging components are tested. Initial results will be presented and discussed later in the presentation. Conclusion: A new mobile CBCT system for head imaging is being developed. With its compact size, a large bore, and quality design, it is expected to be a useful imaging tool for bedside uses. The work is supported by a grant from Chinese Academy of Sciences.

  16. Entrevue avec Jean-Jacques Blaising - Head of Physics Department

    CERN Multimedia

    CERN Audiovisual Service

    2008-01-01

    Q. 1. What has it taken to get the LHC project from its beginnings to the verge of first beams? Q. 2. What can be expected to happen on First Beam Day? Q. 3. What happens next in the story? Q. 4. What does this mean to you personally?

  17. Interview with Philippe Lebrun - Head of Accelerator Technology Department

    CERN Multimedia

    CERN Audiovisual Service

    2008-01-01

    Q. 1. What has it taken to get the LHC project from its beginnings to the verge of first beams? Q. 2. What can be expected to happen on First Beam Day? Q. 3. What happens next in the story? Q. 4. What does this mean to you personally?

  18. Interview with Jean-Jacques Blaising - Head of Physics Department

    CERN Multimedia

    CERN Audiovisual Service

    2008-01-01

    Q. 1. What has it taken to get the LHC project from its beginnings to the verge of first beams? Q. 2. What can be expected to happen on First Beam Day? Q. 3. What happens next in the story? Q. 4. What does this mean to you personally?

  19. Entrevue avec Philippe Lebrun - Head of Accelerator Technology Department

    CERN Multimedia

    CERN Audiovisual Service

    2008-01-01

    Q. 1. What has it taken to get the LHC project from its beginnings to the verge of first beams? Q. 2. What can be expected to happen on First Beam Day? Q. 3. What happens next in the story? Q. 4. What does this mean to you personally?

  20. Impact of Malaysian Polytechnics' Head of Department Multi-Dimensional Leadership Orientation towards Lecturers Work Commitment

    Science.gov (United States)

    Ibrahim, Mohammed Sani; Mujir, Siti Junaidah Mohd

    2012-01-01

    The purpose of this study is to determine if the multi-dimensional leadership orientation of the heads of departments in Malaysian polytechnics affects their leadership effectiveness and the lecturers' commitment to work as perceived by the lecturers. The departmental heads' leadership orientation was determined by five leadership dimensions…

  1. Leadership Style Head of Polytechnic Department and Regard with to Work Culture

    Science.gov (United States)

    Jamaludin, Nur Hasliza Binti; Naim, Nor Azlin Binti; Khamis, Nur Azzarina Binti; Zakaria, Normah Binti

    2015-01-01

    This study aims to look at the leadership style of the heads of departments in technical education and its relationship to the work culture among lecturers Polytechnic Sultan Abdul Halim Mu'adzam Shah in Jitra, Kedah. This research is very important to the head of polytechnic and lecture to work in the good condition with the good leadership. This…

  2. New head of Grado Department of Industrial and Systems Engineering named

    OpenAIRE

    Nystrom, Lynn A.

    2004-01-01

    G. Don Taylor, Jr., director of the Center for Engineering Logistics and Distribution at the University of Louisville, will become head of the Grado Department of Industrial and Systems Engineering in the College of Engineering at Virginia Tech this fall.

  3. Grabau named head of the Department Plant Pathology, Physiology, and Weed Science

    OpenAIRE

    Greiner, Lori A.

    2006-01-01

    Elizabeth A. Grabau, of Blacksburg, Va., will become the new head of the Department of Plant Pathology, Physiology, and Weed Science in the College of Agriculture and Life Sciences at Virginia Tech, effective April 10.

  4. Richard C. Benson, Penn State department head, to lead College of Engineering

    OpenAIRE

    Hincker, Lawrence

    2005-01-01

    University Provost Mark C. McNamee announces the appointment of Richard C. Benson, as Virginia Tech's next dean of the College of Engineering. Benson currently heads the Department of Mechanical and Nuclear Engineering at Penn State University.

  5. Head injuries in accident and emergency departments. How different are children from adults?

    OpenAIRE

    Brookes, M; MacMillan, R.; Cully, S; E. Anderson; S. Murray; Mendelow, A D; Jennett, B

    1990-01-01

    STUDY OBJECTIVE--The aim of the study was to examine the differences between child and adult patients attending accident and emergency departments after recent head injuries. DESIGN AND SETTING--A retrospective survey based on existing case records from 23 Scottish accident and emergency departments for 1985 was compared with prospective data from one hospital over 9 months in 1984. PATIENTS--3838 children under 15 and 4775 adults attended hospital with head injuries during the period analyse...

  6. Analysing the Role of the Subject Head of Department in Secondary Schools in England and Wales: Towards a Theoretical Framework.

    Science.gov (United States)

    Turner, Chris; Bolam, Ray

    1998-01-01

    Argues that contingency theory offers a useful basis for considering the work of subject heads of department in (British) secondary schools, particularly if heads are actively trying to influence the quality of teaching and learning in their curriculum areas. Develops a provisional model to shed light on how department heads actually work with…

  7. Recruitment and Selection of Academic Staff: Perceptions of Department Heads and Job Applicants.

    Science.gov (United States)

    Crothall, Jodi; Callan, Victor; Hartel, Charmine E. J.

    1997-01-01

    Study investigated faculty recruitment procedures across universities, departments, and sectors (public/private) in Australia, using reports from department heads and job applicants and case studies. Results revealed varied recruitment and selection strategies. Job applicants reported satisfaction with most but identified some areas needing…

  8. Problem-based learning in pharmacology:a survey of department heads in Taiwan, China

    Institute of Scientific and Technical Information of China (English)

    Ying-tung LAU

    2004-01-01

    Problem-based learning (PBL) requires active student participation and the use of clinical cases as a trigger to learn within a given area. It has gained much attention as a pedagogic alternative in the course of reform in medica education due to information overload. From discipline-based consideration, it is interesting to understand the views of department heads of pharmacology about implementing PBL for their medical students. According to a general survey from the heads of the department of pharmacology across medical schools in Taiwan, we found that although serious reservation about the approach remains, many departments indeed look forward to including PBL component in their pharmacology curriculum.

  9. Relevance of head motion in dental cone-beam CT scanner images depending on patient positioning

    International Nuclear Information System (INIS)

    The aim of this study is to investigate the effect of head motion on the reconstruction image quality in relation to patient positioning in dental cone-beam computed tomography (CBCT) systems. This study should be intended as the first step to evaluate the effect of the head movements also in more stringent conditions. Head motion was monitored using an EasyTrack-500 system in three acquisition conditions: lying down, sitting and standing. Motion was simulated on a cylinder used to calculate the modulation transfer function in order to quantify the resolution loss associated with it. In none of the three acquisition layouts, head motion could be avoided. As expected head rotation angles are found to be smaller in the lying down configuration than in the sitting and standing ones. In the latter there is a probability of 30% of cases with high excursion rotation angles which would have a clearly perceptible lower image quality. Patient positioning during CBCT scanning can significantly influence occurrence of motion. This should be taken into account when very high image resolution is required in particular in patients that for age or clinical conditions may have difficulties in staying still. (orig.)

  10. Development of computer assisted learning program using cone beam projection for head radiography

    International Nuclear Information System (INIS)

    We present a computer assisted learning (CAL) program to simulate head radiography. The program provides cone beam projections of a target volume, simulating three-dimensional computed tomography (CT) of a head phantom. The generated image is 512 x 512 x 512 pixels with each pixel 0.6 mm on a side. The imaging geometry, such as X-ray tube orientation and phantom orientation, can be varied. The graphical user interface (GUI) of the CAL program allows the study of the effects of varying the imaging geometry; each simulated projection image is shown quickly in an adjoining window. Simulated images with an assigned geometry were compared with the image obtained using the standard geometry in clinical use. The accuracy of the simulated image was verified through comparison with the image acquired using radiography of the head phantom, subsequently processed with a computed radiography system (CR image). Based on correlation coefficient analysis and visual assessment, it was concluded that the CAL program can satisfactorily simulate the CR image. Therefore, it should be useful for the training of head radiography. (author)

  11. Faculty Member Perceptions of Department Head Leadership Effectiveness at a State University in Turkey

    Science.gov (United States)

    Akbulut, Meltem; Nevra Seggie, Fatma; Börkan, Bengü

    2015-01-01

    This article examined the leadership effectiveness of department heads at a state university in Turkey using a model of leadership effectiveness that includes the use of multiple leadership roles to manage situations arising from internal and external university environments. Leadership effectiveness was measured by surveying 70 faculty members in…

  12. An Exploratory Study of the Conflict Management Styles of Department Heads in a Research University Setting

    Science.gov (United States)

    Stanley, Christine A.; Algert, Nancy E.

    2007-01-01

    Conflict in the university setting is an inherent component of academic life. Leaders spend more than 40% of their time managing conflict. Department heads are in a unique position--they encounter conflict from individuals they manage and from others to whom they report such as a senior administrator in the position of dean. There are very few…

  13. Comparing the Leadership Styles of Two Heads of Department at Carnelian School: Comparative Case Studies

    Science.gov (United States)

    Parascandalo, Marthese

    2014-01-01

    The purpose of this dissertation was to compare and contrast the Leadership Styles of two Heads of Department who work at Carnelian Secondary School (anonymized). It augments a previous paper (Parascandalo 2011) which examined the role of the middle leader in secondary schools in educational literature. The investigation by means of two…

  14. Radiation dose evaluation of dental cone beam computed tomography using an anthropomorphic adult head phantom

    International Nuclear Information System (INIS)

    Dental cone beam computed tomography (CBCT) provides high-resolution tomographic images and has been gradually used in clinical practice. Thus, it is important to examine the amount of radiation dose resulting from dental CBCT examinations. In this study, we developed an in-house anthropomorphic adult head phantom to evaluate the level of effective dose. The anthropomorphic phantom was made of acrylic and filled with plaster to replace the bony tissue. The contour of the head was extracted from a set of adult computed tomography (CT) images. Different combinations of the scanning parameters of CBCT were applied. Thermoluminescent dosimeters (TLDs) were used to measure the absorbed doses at 19 locations in the head and neck regions. The effective doses measured using the proposed phantom at 65, 75, and 85 kVp in the D-mode were 72.23, 100.31, and 134.29 µSv, respectively. In the I-mode, the effective doses were 108.24, 190.99, and 246.48 µSv, respectively. The maximum percent error between the doses measured by the proposed phantom and the Rando phantom was l4.90%. Therefore, the proposed anthropomorphic adult head phantom is applicable for assessing the radiation dose resulting from clinical dental CBCT. - Highlights: • A home-made anthropomorphic adult head phantom was proposed. • The proposed phantom can be easily built with lower price than the standard Rando phantom. • The proposed phantom can be used for evaluating the effective dose during dental CBCT scanning

  15. Relationship between Head of Department Leadership Styles and Lecturers Job Satisfactions in Nigerian Public Universities

    Directory of Open Access Journals (Sweden)

    Oladipo Kolapo Sakiru

    2014-02-01

    Full Text Available The Study, relationship between leadership styles and job satisfaction among the head of department and lecturers of Nigerian public universities is definitely a problem of an accelerating importance towards the higher learning institution within their preparation to complete their mission to become a first class university.A highly effective leadership style, along with a reliable labor force appeared to become a decisive importance for any university to have the ability to compete in quality and also to accompany the changes. At the moment, the empirical linkages between the head of department leadership styles and job satisfaction among lecturers in Nigerian public universities aren't fully established by past researchers.Therefore, it is the aim of this study to investigate the relationship between the selected independent variables; leadership styles (transformational, transactional, lasseir-faire and job satisfaction as the dependent variables, determines the common leadership style that is commonly used by the head of the department, and determines the level of job satisfaction among the lecturers. The research design was descriptive correlational study and data were collected employing questionnaires. The study utilized simple random sampling methods to select 217 lecturers with the response rate of 91.7% from the population of Nigerian lecturers studying at three research universities in Malaysia.The findings showed that lecturers job satisfaction is high and also the descriptive statistics revealed that the most commonly used leadership styles among the head of department of Nigeria public university is transformational leadership styles, with the highest mean of 3.9032. The result obtained from the correlational analyses revealed that there is a significant relationship between leadership styles of the head of department and lecturers job satisfaction in public universities in Nigeria. The present study contributes useful information

  16. Effect of guidelines on management of head injury on record keeping and decision making in accident and emergency departments.

    OpenAIRE

    Thomson, R.; Gray, J; Madhok, R; Mordue, A.; Mendelow, A D

    1994-01-01

    OBJECTIVE--To compare record keeping and decision making in accident and emergency departments before and after distribution of guidelines on head injury management as indices of implementation. DESIGN--Before (1987) and after (1990) study of accident and emergency medical records. SETTING--Two accident and emergency departments in England. PATIENTS--1144 adult patients with head injury in department 1 (533 in 1987, 613 in 1990) and 734 in department 2 (370, 364 respectively). MAIN MEASURES--...

  17. Clinical implementation of intraoperative cone-beam CT in head and neck surgery

    Science.gov (United States)

    Daly, M. J.; Chan, H.; Nithiananthan, S.; Qiu, J.; Barker, E.; Bachar, G.; Dixon, B. J.; Irish, J. C.; Siewerdsen, J. H.

    2011-03-01

    A prototype mobile C-arm for cone-beam CT (CBCT) has been translated to a prospective clinical trial in head and neck surgery. The flat-panel CBCT C-arm was developed in collaboration with Siemens Healthcare, and demonstrates both sub-mm spatial resolution and soft-tissue visibility at low radiation dose (e.g., Surgery Toolkit (IGSTK). The CBCT C-arm has been successfully deployed in 15 head and neck cases and streamlined into the surgical environment using human factors engineering methods and expert feedback from surgeons, nurses, and anesthetists. Intraoperative imaging is implemented in a manner that maintains operating field sterility, reduces image artifacts (e.g., carbon fiber OR table) and minimizes radiation exposure. Image reviews conducted with surgical staff indicate bony detail and soft-tissue visualization sufficient for intraoperative guidance, with additional artifact management (e.g., metal, scatter) promising further improvements. Clinical trial deployment suggests a role for intraoperative CBCT in guiding complex head and neck surgical tasks, including planning mandible and maxilla resection margins, guiding subcranial and endonasal approaches to skull base tumours, and verifying maxillofacial reconstruction alignment. Ongoing translational research into complimentary image-guidance subsystems include novel methods for real-time tool tracking, fusion of endoscopic video and CBCT, and deformable registration of preoperative volumes and planning contours with intraoperative CBCT.

  18. Treatment of Head and Neck Paragangliomas With External Beam Radiation Therapy

    International Nuclear Information System (INIS)

    Purpose: To retrospectively assess the outcomes of radiation therapy in patients with head and neck paragangliomas. Methods and Materials: From 1990 to 2009, 66 patients with 81 head and neck paragangliomas were treated by conventional external beam radiation therapy in 25 fractions at a median dose of 45 Gy (range, 41.4-68 Gy). One case was malignant. The median gross target volume and planning target volume were 30 cm3 (range, 0.9-243 cm3) and 116 cm3 (range, 24-731 cm3), respectively. Median age was 57.4 years (range, 15-84 years). Eleven patients had multicentric lesions, and 8 had family histories of paraganglioma. Paragangliomas were located in the temporal bone, the carotid body, and the glomus vagal in 51, 18, and 10 patients, respectively. Forty-six patients had exclusive radiation therapy, and 20 had salvage radiation therapy. The median follow-up was 4.1 years (range, 0.1-21.2 years). Results: One patient had a recurrence of temporal bone paraganglioma 8 years after treatment. The actuarial local control rates were 100% at 5 years and 98.7% at 10 years. Patients with multifocal tumors and family histories were significantly younger (42 years vs 58 years [P=.002] and 37 years vs 58 years [P=.0003], respectively). The association between family predisposition and multifocality was significant (P<.001). Two patients had cause-specific death within the 6 months after irradiation. During radiation therapy, 9 patients required hospitalization for weight loss, nausea, mucositis, or ophthalmic zoster. Two late vascular complications occurred (middle cerebral artery and carotid stenosis), and 2 late radiation-related meningiomas appeared 15 and 18 years after treatment. Conclusion: Conventional external beam radiation therapy is an effective and safe treatment option that achieves excellent local control; it should be considered as a first-line treatment of choice for head and neck paragangliomas

  19. Treatment of Head and Neck Paragangliomas With External Beam Radiation Therapy

    Energy Technology Data Exchange (ETDEWEB)

    Dupin, Charles, E-mail: c.dupin@bordeaux.unicancer.fr [Department of Radiotherapy, Comprehensive Cancer Center, Institut Bergonié, Bordeaux (France); Lang, Philippe [Department of Radiotherapy, Pitié Salpétrière, Paris (France); Dessard-Diana, Bernadette [Department of Radiotherapy, Hopital Européen Georges Pompidou, Paris (France); Simon, Jean-Marc; Cuenca, Xavier; Mazeron, Jean-Jacques; Feuvret, Loïc [Department of Radiotherapy, Pitié Salpétrière, Paris (France)

    2014-06-01

    Purpose: To retrospectively assess the outcomes of radiation therapy in patients with head and neck paragangliomas. Methods and Materials: From 1990 to 2009, 66 patients with 81 head and neck paragangliomas were treated by conventional external beam radiation therapy in 25 fractions at a median dose of 45 Gy (range, 41.4-68 Gy). One case was malignant. The median gross target volume and planning target volume were 30 cm{sup 3} (range, 0.9-243 cm{sup 3}) and 116 cm{sup 3} (range, 24-731 cm{sup 3}), respectively. Median age was 57.4 years (range, 15-84 years). Eleven patients had multicentric lesions, and 8 had family histories of paraganglioma. Paragangliomas were located in the temporal bone, the carotid body, and the glomus vagal in 51, 18, and 10 patients, respectively. Forty-six patients had exclusive radiation therapy, and 20 had salvage radiation therapy. The median follow-up was 4.1 years (range, 0.1-21.2 years). Results: One patient had a recurrence of temporal bone paraganglioma 8 years after treatment. The actuarial local control rates were 100% at 5 years and 98.7% at 10 years. Patients with multifocal tumors and family histories were significantly younger (42 years vs 58 years [P=.002] and 37 years vs 58 years [P=.0003], respectively). The association between family predisposition and multifocality was significant (P<.001). Two patients had cause-specific death within the 6 months after irradiation. During radiation therapy, 9 patients required hospitalization for weight loss, nausea, mucositis, or ophthalmic zoster. Two late vascular complications occurred (middle cerebral artery and carotid stenosis), and 2 late radiation-related meningiomas appeared 15 and 18 years after treatment. Conclusion: Conventional external beam radiation therapy is an effective and safe treatment option that achieves excellent local control; it should be considered as a first-line treatment of choice for head and neck paragangliomas.

  20. Factors predicting early outcome in patients admitted at emergency department with severe head trauma

    Institute of Scientific and Technical Information of China (English)

    Rejeb Belfekih Imen; Chakroun Olfa; Chtara Kamilia; Boujelbene Meriam; Ksibi Hichem; Chaari Adel; Bahloul Mabrouk; Rekik Noureddine

    2015-01-01

    Objective:To determine predictive factors of early mortality among severe traumatic brain injury in emergency department. Methods: This study is based on a retrospective analysis of 198 admitted in emergency depatment with severe head injury (Glasgow coma scale score≤8) of an university hospital (Sfax, Tunisia). Basic demographic, clinical, biological and radiological data were recorded on admission and during emergency department stay. Results: Forty two patients were died. Univariate analysis showed that the presence of shock, cardiac arrest, bilateral mydriasis, high value of injury severity score and low value of Glasgow coma scale were associated with mortality. Moreover, meningeal hemorrhage, cerebral and subdural haematoma were associated with poorer outcome. Multivariate analysis showed that factors associated with a poor prognosis were cardiac arrest cerebral and the presence of cerebral haematoma. Conclusions: Improving pre-hospital care and ovoid futile resuscitation to given priority in resource allocation and urgent CT scan of the head to look for operable mass lesions as early detection should improve the prognosis of severe head injury at emergency department.

  1. Deformable planning CT to cone-beam CT image registration in head-and-neck cancer

    International Nuclear Information System (INIS)

    Purpose: The purpose of this work was to implement and validate a deformable CT to cone-beam computed tomography (CBCT) image registration method in head-and-neck cancer to eventually facilitate automatic target delineation on CBCT. Methods: Twelve head-and-neck cancer patients underwent a planning CT and weekly CBCT during the 5-7 week treatment period. The 12 planning CT images (moving images) of these patients were registered to their weekly CBCT images (fixed images) via the symmetric force Demons algorithm and using a multiresolution scheme. Histogram matching was used to compensate for the intensity difference between the two types of images. Using nine known anatomic points as registration targets, the accuracy of the registration was evaluated using the target registration error (TRE). In addition, region-of-interest (ROI) contours drawn on the planning CT were morphed to the CBCT images and the volume overlap index (VOI) between registered contours and manually delineated contours was evaluated. Results: The mean TRE value of the nine target points was less than 3.0 mm, the slice thickness of the planning CT. Of the 369 target points evaluated for registration accuracy, the average TRE value was 2.6±0.6 mm. The mean TRE for bony tissue targets was 2.4±0.2 mm, while the mean TRE for soft tissue targets was 2.8±0.2 mm. The average VOI between the registered and manually delineated ROI contours was 76.2±4.6%, which is consistent with that reported in previous studies. Conclusions: The authors have implemented and validated a deformable image registration method to register planning CT images to weekly CBCT images in head-and-neck cancer cases. The accuracy of the TRE values suggests that they can be used as a promising tool for automatic target delineation on CBCT.

  2. Application of headed studs in steel fiber reinforced cementitious composite slab of steel beam-column connection

    Science.gov (United States)

    Yao, Cui; Nakashima, Masayoshi

    2012-03-01

    Steel fiber reinforced cementitous composites (SFRCC) is a promising material with high strength in both compression and tension compared with normal concrete. The ductility is also greatly improved because of 6% volume portion of straight steel fibers. A steel beam-column connection with Steel fiber reinforced cementitous composites (SFRCC) slab diaphragms is proposed to overcome the damage caused by the weld. The push-out test results suggested that the application of SFRCC promises larger shear forces transferred through headed studs allocated in a small area in the slab. Finite element models were developed to simulate the behavior of headed studs. The failure mechanism of the grouped arrangement is further discussed based on a series of parametric analysis. In the proposed connection, the SFRCC slab is designed as an exterior diaphragm to transfer the beam flange load to the column face. The headed studs are densely arranged on the beam flange to connect the SFRCC slab diaphragms and steel beams. The seismic performance and failure mechanism of the SFRCC slab diaphragm beam-column connection were investigated based on the cyclic loading test. Beam hinge mechanism was achieved at the end of the SFRCC slab diaphragm by using sufficient studs and appropriate rebars in the SFRCC slab.

  3. A survey of techniques to reduce and manage external beam radiation-induced xerostomia in British oncology and radiotherapy departments

    Energy Technology Data Exchange (ETDEWEB)

    Macknelly, Andrew [Norfolk and Norwich University Hospital (United Kingdom); Day, Jane [Faculty of Health, Wellbeing and Science, University Campus Suffolk, Waterfront Building, Neptune Quay, Ipswich (United Kingdom)], E-mail: j.day@ucs.ac.uk

    2009-11-15

    Xerostomia is the most common side effect of external beam radiotherapy to the head and neck [Anand A, Jain J, Negi P, Chaudhoory A, Sinha S, Choudhury P, et-al. Can dose reduction to one parotid gland prevent xerostomia? - A feasibility study for locally advanced head and neck cancer patients treated with intensity-modulated radiotherapy. Clinical Oncology 2006;18(6):497-504.]. A survey was carried out in British oncology departments to determine what treatment regimes, to minimise xerostomia, are used for patients with head-and-neck cancers treated with external beam radiotherapy. A semi-structured questionnaire consisting of both quantitative and qualitative questions was designed that asked departments which of the identified methods they used, why a method might not be currently employed, and whether its use had ever been considered. The study found that there are wide disparities between the techniques employed by oncology departments to avoid and reduce xerostomia in patients with cancers of the head and neck. The National Institute of Clinical Health and Excellence, [National Institute for Clinical Health and Excellence (NICE). Improving outcomes in head and neck cancers: the manual. London: Office of Public Sector Information; 2004.] for example, recommends that patients are given dental care and dietary advice but some departments did not appear to be doing this. Less than half of departments stated that they offer complementary therapies and less than 40% prescribed pilocarpine, a saliva-stimulant. Only two respondents stated that they use amifostine, a radioprotector, during radiotherapy treatment to the head and neck. The results also suggested a move toward using Intensity Modulated Radiotherapy (IMRT) for treating head-and-neck cancers which offers better normal tissue sparing than three-dimensional conformal radiotherapy. [Anand A, Jain J, Negi P, Chaudhoory A, Sinha S, Choudhury P, et al. Can dose reduction to one parotid gland prevent xerostomia

  4. A survey of techniques to reduce and manage external beam radiation-induced xerostomia in British oncology and radiotherapy departments

    International Nuclear Information System (INIS)

    Xerostomia is the most common side effect of external beam radiotherapy to the head and neck [Anand A, Jain J, Negi P, Chaudhoory A, Sinha S, Choudhury P, et-al. Can dose reduction to one parotid gland prevent xerostomia? - A feasibility study for locally advanced head and neck cancer patients treated with intensity-modulated radiotherapy. Clinical Oncology 2006;18(6):497-504.]. A survey was carried out in British oncology departments to determine what treatment regimes, to minimise xerostomia, are used for patients with head-and-neck cancers treated with external beam radiotherapy. A semi-structured questionnaire consisting of both quantitative and qualitative questions was designed that asked departments which of the identified methods they used, why a method might not be currently employed, and whether its use had ever been considered. The study found that there are wide disparities between the techniques employed by oncology departments to avoid and reduce xerostomia in patients with cancers of the head and neck. The National Institute of Clinical Health and Excellence, [National Institute for Clinical Health and Excellence (NICE). Improving outcomes in head and neck cancers: the manual. London: Office of Public Sector Information; 2004.] for example, recommends that patients are given dental care and dietary advice but some departments did not appear to be doing this. Less than half of departments stated that they offer complementary therapies and less than 40% prescribed pilocarpine, a saliva-stimulant. Only two respondents stated that they use amifostine, a radioprotector, during radiotherapy treatment to the head and neck. The results also suggested a move toward using Intensity Modulated Radiotherapy (IMRT) for treating head-and-neck cancers which offers better normal tissue sparing than three-dimensional conformal radiotherapy. [Anand A, Jain J, Negi P, Chaudhoory A, Sinha S, Choudhury P, et al. Can dose reduction to one parotid gland prevent xerostomia

  5. 28 October 2013- Former US Vice President A. Gore signing the guest book with Technology Department Head F. Bordry, Head of International Relations R. Voss, Director for Research and Scientific Computing S. Bertolucci and CMS Collaboration Spokesperson J. Incandela.

    CERN Multimedia

    Maximilien Brice

    2013-01-01

    28 October 2013- Former US Vice President A. Gore signing the guest book with Technology Department Head F. Bordry, Head of International Relations R. Voss, Director for Research and Scientific Computing S. Bertolucci and CMS Collaboration Spokesperson J. Incandela.

  6. A morphological comparison of the piriform sinuses in head-on and head-rotated views of seated subjects using cone-beam computed tomography

    International Nuclear Information System (INIS)

    Food flow in the oropharynx changes when the head is rotated. The purpose of this study was to evaluate morphological differences in the upper and lower piriform sinuses in head-on (HO) versus head-rotated (HR) positions. Ten healthy adult volunteers with no previous history of dysphagia were subjected to cone-beam computed tomography (CBCT) in the HO and HR positions. Binary CBCT images were created at 50% gray scale to examine morphological changes in the lower piriform sinuses. Upon rotation to the right, the cross-sectional area of the left lower piriform sinus increased significantly (P=0.037). The depth of the right lower piriform sinus also increased significantly (P=0.011) upon rotation. The volume of the lower piriform sinuses increased significantly on both sides (right, P=0.009; left, P=0.013). The upper piriform sinuses acquired a teardrop shape, with the rotated side narrowed and opposite side enlarged. These results suggest that changes in food flow during head rotation result mainly from changes in the size and shape of the upper piriform sinuses. (author)

  7. Curriculum Leadership in Action: A Tale of Four Community College Heads of Department Leading a Curriculum Development Project

    Science.gov (United States)

    Albashiry, Nabeel M.; Voogt, Joke M.; Pieters, Jules M.

    2016-01-01

    College Heads of Department (HoDs) are increasingly expected to perform more curriculum-leadership tasks, maintaining and advancing the department curriculum, especially in developing countries. However, in practice, HoDs are reported to pay little attention to this aspect of their job due to several factors--one of which is a lack of professional…

  8. Evaluation of linear measurements of implant sites based o head orientation during acquisition: An ex vivo study using cone-beam computed tomography

    Energy Technology Data Exchange (ETDEWEB)

    Sabban, Hanadi; Mahdian, Mina; Dhingra, Ajay; Lurie, Alan G.; Tadinada, Aditya [University of Connecticut School of Dental Medicine, Farmington (United States)

    2015-06-15

    This study evaluated the effect of various head orientations during cone-beam computed tomography (CBCT) image acquisition on linear measurements of potential implant sites. Six dry human skulls with a total of 28 implant sites were evaluated for seven different head orientations. The scans were acquired using a Hitachi CB-MercuRay CBCT machine. The scanned volumes were reconstructed. Horizontal and vertical measurements were made and were compared to measurements made after simulating the head position to corrected head angulations. Data was analyzed using a two-way ANOVA test. Statistical analysis revealed a significant interaction between the mean errors in vertical measurements with a marked difference observed at the extension head position (P<0.05). Statistical analysis failed to yield any significant interaction between the mean errors in horizontal measurements at various head positions. Head orientation could significantly affect the vertical measurements in CBCT scans. The main head position influencing the measurements is extension.

  9. The impact of reorienting cone-beam computed tomographic images in varied head positions on the coordinates of anatomical landmarks

    Science.gov (United States)

    Kim, Jae Hun; Hwang, Jae Joon; Lee, Jung-Hee

    2016-01-01

    Purpose The aim of this study was to compare the coordinates of anatomical landmarks on cone-beam computed tomographic (CBCT) images in varied head positions before and after reorientation using image analysis software. Materials and Methods CBCT images were taken in a normal position and four varied head positions using a dry skull marked with 3 points where gutta percha was fixed. In each of the five radiographic images, reference points were set, 20 anatomical landmarks were identified, and each set of coordinates was calculated. Coordinates in the images from the normally positioned head were compared with those in the images obtained from varied head positions using statistical methods. Post-reorientation coordinates calculated using a three-dimensional image analysis program were also compared to the reference coordinates. Results In the original images, statistically significant differences were found between coordinates in the normal-position and varied-position images. However, post-reorientation, no statistically significant differences were found between coordinates in the normal-position and varied-position images. Conclusion The changes in head position impacted the coordinates of the anatomical landmarks in three-dimensional images. However, reorientation using image analysis software allowed accurate superimposition onto the reference positions. PMID:27358821

  10. Characterization and performances of a monitoring ionization chamber dedicated to IBA-universal irradiation head for Pencil Beam Scanning

    Energy Technology Data Exchange (ETDEWEB)

    Courtois, C. [LPC (IN2P3-ENSICAEN-UNICAEN), 6 Boulevard Maréchal Juin, 14050 Caen (France); Boissonnat, G., E-mail: boissonnat@lpccaen.in2p3.fr [LPC (IN2P3-ENSICAEN-UNICAEN), 6 Boulevard Maréchal Juin, 14050 Caen (France); Brusasco, C. [IBA, 3 Chemin du Cyclotron, 31348 Louvain-la-Neuve (Belgium); Colin, J.; Cussol, D.; Fontbonne, J.M. [LPC (IN2P3-ENSICAEN-UNICAEN), 6 Boulevard Maréchal Juin, 14050 Caen (France); Marchand, B.; Mertens, T.; Neuter, S. de [IBA, 3 Chemin du Cyclotron, 31348 Louvain-la-Neuve (Belgium); Peronnel, J. [LPC (IN2P3-ENSICAEN-UNICAEN), 6 Boulevard Maréchal Juin, 14050 Caen (France)

    2014-02-01

    Every radiotherapy center has to be equipped with real-time beam monitoring devices. In 2008, we developed an ionization chamber in collaboration with the IBA (Ion Beam Applications) company. This monitoring device called IC2/3 was developed to be used in IBA universal irradiation head for Pencil Beam Scanning (PBS). Here we present the characterization of the IC2/3 monitor in the energy and flux ranges used in protontherapy. The equipment has been tested with an IBA cyclotron able to deliver proton beams from 70 to 230 MeV. This beam monitoring device has been validated and is now installed at the Westdeutsches Protonentherapiezentrum Essen protontherapy center (WPE, Germany). The results obtained in both terms of spatial resolution and dose measurements are at least equal to the initial specifications needed for PBS purposes. The detector measures the dose with a relative uncertainty lower than 1% in the range from 0.5 Gy/min to 8 Gy/min while the spatial resolution is better than 250μm. The technology has been patented and five IC2/3 chambers were delivered to IBA. Nowadays, IBA produces the IC2/3 beam monitoring device as a part of its Proteus 235 product.

  11. An EPID response calculation algorithm using spatial beam characteristics of primary, head scattered and MLC transmitted radiation

    International Nuclear Information System (INIS)

    We have developed an independent algorithm for the prediction of electronic portal imaging device (EPID) response. The algorithm uses a set of images [open beam, closed multileaf collimator (MLC), various fence and modified sweeping gap patterns] to separately characterize the primary and head-scatter contributions to EPID response. It also characterizes the relevant dosimetric properties of the MLC: Transmission, dosimetric gap, MLC scatter [P. Zygmansky et al., J. Appl. Clin. Med. Phys. 8(4) (2007)], inter-leaf leakage, and tongue and groove [F. Lorenz et al., Phys. Med. Biol. 52, 5985-5999 (2007)]. The primary radiation is modeled with a single Gaussian distribution defined at the target position, while the head-scatter radiation is modeled with a triple Gaussian distribution defined downstream of the target. The distances between the target and the head-scatter source, jaws, and MLC are model parameters. The scatter associated with the EPID is implicit in the model. Open beam images are predicted to within 1% of the maximum value across the image. Other MLC test patterns and intensity-modulated radiation therapy fluences are predicted to within 1.5% of the maximum value. The presented method was applied to the Varian aS500 EPID but is designed to work with any planar detector with sufficient spatial resolution

  12. The Relationship of Leadership Style of the Department Head to Nursing Faculty Professional Satisfaction and Organizational Commitment

    Science.gov (United States)

    Byrne, Daria McConnell

    2011-01-01

    The purpose of this research was to determine if there was a relationship between the leadership style of the nursing department head and the level of professional satisfaction and organizational commitment by nursing faculty members. The survey instrument was a self-constructed four point Likert scale designed by the researcher to determine the…

  13. Characterization and performances of a monitoring ionization chamber dedicated to IBA-universal irradiation head for Pencil Beam Scanning

    CERN Document Server

    Courtois, C; Brusasco, C; Colin, J; Cussol, D; Fontbonne, J M; Marchand, B; Mertens, T; De Neuter, S; Peronnel, J

    2013-01-01

    Every radiotherapy center has to be equipped with real-time beam monitoring devices. In 2008, the medical application group from the Laboratory of Corpuscular Physics (LPC Caen) developed an Ionization Chamber in collaboration with the company IBA (Ion Beam Applications). This monitoring device called IC2/3 was developed to be used in IBAs universal irradiation head for Pencil Beam Scanning (PBS). The objectives presented in this article are to characterize the IC2/3 monitor in the energy and ux ranges used in protontherapy. The equipment has been tested with an IBAs cyclotronable to deliver proton beams from 70 to 230 MeV. This beam monitoring device has been validated and is now installed at the Westdeutsches Protonentherapiezentrum Essen protontherapy center (WPE, Germany). The results obtained in both terms of spatial resolution and dose measurements are at least equal to the initials speci cations needed for PBS purposes. The detector measures the dose with a relative precision better than 1% in the rang...

  14. A Study of Relationship Between Emotional Intelligence with Leadership Styles in the Heads of Departments at University of Mohaghegh Ardabili

    Directory of Open Access Journals (Sweden)

    A. Zahed-Babelan

    2009-01-01

    Full Text Available The purpose of this study was to determine simple and multiple relationships between leadership styles and emotional intelligence component in the Heads of Departments University of Mohaghegh Ardabili. The Statistical population involved all the academic staff members and Heads of the Departments at the university (N = 118. Based on the nature of subject and research questions, correlation method was thought to best serve the purpose of the present study. To collect the data, Emotional Intelligence Scale (EIS and Bass and Avolio Multifactor Leadership Style Questionnaire (MLQ form 5X were used. For data analysis, Pierson correlation and multiple regression in enter way were used. The Results indicated high satisfaction on the part of the majority of the members about the performance and leadership style of the Heads of the Departments. Also, transformational style was found to be of high prevalence among the Heads of the Departments. Furthermore, prediction of variables with the use of multivariate regression indicated that only the use of emotional subscale can predict the transformational and Laissez faire leadership styles, but the use of emotional, emotional regulation and assessment and expression of emotions (p<0.01 can predict the transactional leadership styles. In the study of the relationship between variables, it was found that a positive correlation exists between transformational leadership style and emotional intelligence (p<0.05 has negative correlation between transactional leadership style and emotional intelligence (p<0.01, but not significant relationship between Laissez faire leadership style and emotional intelligence was found. This study showed that EI and its different dimensions have a high power in predicting leadership styles of the Heads of the Departments.

  15. Meeting of Directors and Heads of Department from CEA-Saclay, France

    CERN Multimedia

    Patrice Loïez

    2002-01-01

    Directors and Heads of Department from the Saclay centre of the French atomic energy commission (CEA) visited CERN in December. They are pictured here at the LHC magnet test facility in building SM18. On the left behind the visitors are the test benches where magnets are prepared for installation in String 2: the 120-metre full-scale model of an LHC cell of the regular part of the arc, which can be seen to the right. Photos 01, 02: Left to right: Marc Dejardin, Alain Givernaud, Louis Laurent, François Kircher, Antoine Masurel, Joël Feltesse, André Menez, T. Taylor, Philippe Pradelles, Bernard Sevestre, Michel Roche, Jean-Yves Gascoin, Thierry Lieven, Michel Spiro, Jean-Pierre Pervès, Yves Lemoigne, Béatrice Reder, Georges Carola, Philippe Lebrun, Yves Bourlat, Bertrand Mercier, Jean-Paul Langlois, Patrick Laurent, Didier Moulin, Xavier Vitart, Marc Serre, Jean-Louis Pierrey, Patrick Jarry, Bruno Mansoulié, Stéphane Lequien, Hervé Barbelin, Philippe Pallier, Jean-Yves Guillamot, and Norbert Sioegel.

  16. SU-E-T-149: Electron Beam Profile Differences Between Elekta MLCi2 and Elekta Agility Treatment Heads

    International Nuclear Information System (INIS)

    Purpose: To report and investigate observed differences in electron beam profiles at various energies/applicators between Elekta MLCi2 and Agility treatment head on Elekta Infinity LINAC Methods: When we upgraded from MLCi2 to Agility on one of our Elekta Infinity LINAC's, electron beam PDDs and profiles were acquired for comparison purpose. All clinical electron energies (6/9/12/15/12/18 MeV) and electron applicators (6/10/14/20/25 square) were included in measurement. PDDs were acquired at 100 SSD in water (PTW MP3 water tank) with a plane-parallel ion chamber (PTW Roos). X and Y Profiles were acquired using IC Profiler (Sun Nuclear Corp.) at 1cm and maximum PDD depths (water equivalent). Results: All PDD curves match very well between MLCi2 and Agility treatment head. However, some significant differences on electron profiles were found. On Agility, even after increasing the default auto-tracking offset values for backup diaphragms in Y and MLC in X by 2.8 cm (the maximum allowed change is 3.0 cm), electron profiles still have rounder shoulders comparing to corresponding MLCi2 profiles. This difference is significantly more pronounced at larger applicators (20 and 25 square), for all electron energies. Conclusion: The significant design change between MLCi2 and Agility beam limiting device seems to affect exit electron beam profiles. In IEC1217 X direction, the main change on Agility is the removal of the original MLCi2 X backup diaphragms and replacing it with MLC leaves; In Y direction, the main change is the radius and materials on Y backup diaphragms

  17. PS internal target area : three secondary beams heading towards the South Hall

    CERN Multimedia

    1962-01-01

    The start of some of the secondary particle beams produced by the 28 GeV proton synchrotron. On the left, shielding bricks form a collimator; to their right are vacuum pipes, passing through guiding lenses and magnets, for beams of charged particles. (See also photo No 4878).

  18. VMC++ versus BEAMnrc: A comparison of simulated linear accelerator heads for photon beams

    International Nuclear Information System (INIS)

    BEAMnrc, a code for simulating medical linear accelerators based on EGSnrc, has been benchmarked and used extensively in the scientific literature and is therefore often considered to be the gold standard for Monte Carlo simulations for radiotherapy applications. However, its long computation times make it too slow for the clinical routine and often even for research purposes without a large investment in computing resources. VMC++ is a much faster code thanks to the intensive use of variance reduction techniques and a much faster implementation of the condensed history technique for charged particle transport. A research version of this code is also capable of simulating the full head of linear accelerators operated in photon mode (excluding multileaf collimators, hard and dynamic wedges). In this work, a validation of the full head simulation at 6 and 18 MV is performed, simulating with VMC++ and BEAMnrc the addition of one head component at a time and comparing the resulting phase space files. For the comparison, photon and electron fluence, photon energy fluence, mean energy, and photon spectra are considered. The largest absolute differences are found in the energy fluences. For all the simulations of the different head components, a very good agreement (differences in energy fluences between VMC++ and BEAMnrc <1%) is obtained. Only a particular case at 6 MV shows a somewhat larger energy fluence difference of 1.4%. Dosimetrically, these phase space differences imply an agreement between both codes at the <1% level, making VMC++ head module suitable for full head simulations with considerable gain in efficiency and without loss of accuracy

  19. Minor head injury in anticoagulated patients: a 6-year retrospective analysis in an emergency department

    Directory of Open Access Journals (Sweden)

    Alessandro Riccardi

    2014-05-01

    Full Text Available The appropriate management of minor head injury (MHI in patients receiving oral anticoagulant (OAC is unclear. In this retrospective study, we focused on elderly patients (>65 years treated with OAC, presented to our emergency department with MHI between 2004 and 2010. Three hundred and six patients with MHI were taking OAC: we documented 7.19% hemorrhages at the first computed tomography (C; 18.19% deaths; 50.1% spontaneous reabsorptions; 22.73% deteriorations of intracranial bleeding without surgical intervention (for clinical comorbidity, and 4.55% neurosurgical interventions. We documented a second positive CT scan in 2 patients (1.51% who had no symptoms and remained asymptomatic during observation. In both cases, intracranial bleeding resolved spontaneously. The mean international normalized ratio (INR value was 2.26, higher in the group of patients with bleeding (2.74 than in the group without bleeding (2.19. We found a significant increased risk in patients with posttraumatic loss of consciousness [odds ratio (OR 28.3], diffuse headache (OR 14.79, vomiting (OR 14.2 and neurological signs (OR 5.27. We did not reach significance in patients with post-traumatic amnesia. Our data confirm the need for a CT scan of any patients on OAC with MHI. None of our patients developed any symptoms or signs during observation, and only 2 patients developed an intracranial hemorrhage in the second CT scan with a favorable evolution. Our data need to be confirmed with an observational study, but we suggest that the second CT could be reserved for patients developing symptoms and signs during observation. We also underline the role of the INR in the stratification of risk.

  20. 18 December 2012 - British University of Edinburgh Principal T. O’Shea and delegation (see list below) visiting the CERN Control Centre with Beams Department D. Nisbet, the LHC superconducting magnet test hall with Beams Department R. Veness, in the ATLAS Visitor Centre and experimental cavern with Collaboration Spokesperson F. Gianotti, in LHCb experimental cavern with Collaboration Spokesperson P. Campana and signing the guest book with CERN Director-General R. Heuer

    CERN Multimedia

    Jean-Claude Gadmer

    2012-01-01

    The delegation was throughout accompanied by Beams Department R. Veness and Physics Department and ATLAS Collaboration P. Wells 1.\tProf. Sir Timothy O'Shea, Principal, University of Edinburgh 2.\tProf. Lesley Yellowlees, Vice Principal, Head of College of Science and Engineering 3.\tProf Jeff Haywood, Vice Principal for Knowledge Management 4.\tProf. Peter Higgs, Professor of Theoretical Physics 5.\tMr Bruce Minto, Supporter of the University 6.\tProf. Walter Nimmo, Supporter of the University 7.\tProf. Arthur Trew, Head of School of Physics and Astronomy 8.\tProf David Robertson, Head of School of Informatics 9.\tProf Stefano Brandani, Head of School of Engineering 10.\tMr Alan Walker, accompanying Prof. Higgs 11.\tProf. Peter Clarke, LHCb Collaboration, School of Physics and Astronomy

  1. An Exploration of Effective Leadership Facets at Head of Department level in the Institute of Technology (IOT) Sector in Ireland

    OpenAIRE

    O'Sullivan, Neil

    2014-01-01

    Change management is becoming increasingly important in the public sector. The role of leadership in delivering such change is critical yet remains under-researched, Sadeghi and Pihie, (2012). Focusing on higher education, this study will address this gap by exploring effective leadership facets at Head of Department (HOD) level in the Institute of Technology (IOT) sector in Ireland. Using a conceptual model developed by Bryman for the Leadership Foundation for Higher Education (LFHE) (200...

  2. Positional change of the condylar heads after wearing complete denture on dental cone beam CT

    International Nuclear Information System (INIS)

    The aim of this study was to evaluate the change in the position of the mandibular condyle within articular fossa by a CBCT after wearing complete denture (CD). CBCT of 34 temporomandibular joints were taken from 9 male and 8 female patients with CB MercurayTM (Hitachi, Japan) before and after wearing a CD for rehabilitation. Position of mandibular condyle within articular fossa at centric occlusion was evaluated with Vimplant2.0TM (CyberMed, Korea) on the central parasagittal view and curved panoramic coronal view of the condylar head. A statistical evaluation was done with SPSS. The range of anteroposterior positional rate (AP) of condylar head within articular fossa was -16-5 and -10-12 respectively on the right and left sides. Before wearing CD, the AP rate showed discrepancy between right and left sides (p<0.05). After wearing CD, both condyles showed a tendency to decrease in posterior condylar position (right side; p<0.05). The average discrepancy between right and left side in mediolateral positional rate (MD) was 15.5 and 4.5 respectively before and after wearing CD. The improvement was observed in mediolateral relationship of both condylar heads after wearing CD (p<0.01). Before wearing CD, the average horizontal angle of long axis of condylar head was 79.6 ± 2.7 .deg. C and 80.1 ± 5.7 .deg. C respectively on the right and left sides. After wearing CD, both condyles were rotated in the same direction in average on axial plane. We observed with CBCT the significant clinical evidence in case of positional change of mandibular condyle after wearing complete denture.

  3. Practically acquired and modified cone-beam computed tomography images for accurate dose calculation in head and neck cancer

    International Nuclear Information System (INIS)

    On-line cone-beam computed tomography (CBCT) may be used to reconstruct the dose for geometric changes of patients and tumors during radiotherapy course. This study is to establish a practical method to modify the CBCT for accurate dose calculation in head and neck cancer. Fan-beam CT (FBCT) and Elekta's CBCT were used to acquire images. The CT numbers for different materials on CBCT were mathematically modified to match them with FBCT. Three phantoms were scanned by FBCT and CBCT for image uniformity, spatial resolution, and CT numbers, and to compare the dose distribution from orthogonal beams. A Rando phantom was scanned and planned with intensity-modulated radiation therapy (IMRT). Finally, two nasopharyngeal cancer patients treated with IMRT had their CBCT image sets calculated for dose comparison. With 360 acquisition of CBCT and high-resolution reconstruction, the uniformity of CT number distribution was improved and the otherwise large variations for background and high-density materials were reduced significantly. The dose difference between FBCT and CBCT was < 2% in phantoms. In the Rando phantom and the patients, the dose-volume histograms were similar. The corresponding isodose curves covering ≥ 90% of prescribed dose on FBCT and CBCT were close to each other (within 2 mm). Most dosimetric differences were from the setup errors related to the interval changes in body shape and tumor response. The specific CBCT acquisition, reconstruction, and CT number modification can generate accurate dose calculation for the potential use in adaptive radiotherapy.

  4. Practically acquired and modified cone-beam computed tomography images for accurate dose calculation in head and neck cancer

    Energy Technology Data Exchange (ETDEWEB)

    Hu, Chih-Chung [National Taiwan Univ. Hospital and College of Medicine, Taipei (China). Division of Radiation Oncology; Yuanpei Univ., Hsinchu (China). Dept. of Radiological Technology; Huang, Wen-Tao [Yuanpei Univ., Hsinchu (China). Dept. of Radiological Technology; Tsai, Chiao-Ling; Chao, Hsiao-Ling; Huang, Guo-Ming; Wang, Chun-Wei [National Taiwan Univ. Hospital and College of Medicine, Taipei (China). Division of Radiation Oncology; Wu, Jian-Kuen [National Taiwan Univ. Hospital and College of Medicine, Taipei (China). Division of Radiation Oncology; National Taiwan Normal Univ., Taipei (China). Inst. of Electro-Optical Science and Technology; Wu, Chien-Jang [National Taiwan Normal Univ., Taipei (China). Inst. of Electro-Optical Science and Technology; Cheng, Jason Chia-Hsien [National Taiwan Univ. Hospital and College of Medicine, Taipei (China). Division of Radiation Oncology; National Taiwan Univ. Taipei (China). Graduate Inst. of Oncology; National Taiwan Univ. Taipei (China). Graduate Inst. of Clinical Medicine; National Taiwan Univ. Taipei (China). Graduate Inst. of Biomedical Electronics and Bioinformatics

    2011-10-15

    On-line cone-beam computed tomography (CBCT) may be used to reconstruct the dose for geometric changes of patients and tumors during radiotherapy course. This study is to establish a practical method to modify the CBCT for accurate dose calculation in head and neck cancer. Fan-beam CT (FBCT) and Elekta's CBCT were used to acquire images. The CT numbers for different materials on CBCT were mathematically modified to match them with FBCT. Three phantoms were scanned by FBCT and CBCT for image uniformity, spatial resolution, and CT numbers, and to compare the dose distribution from orthogonal beams. A Rando phantom was scanned and planned with intensity-modulated radiation therapy (IMRT). Finally, two nasopharyngeal cancer patients treated with IMRT had their CBCT image sets calculated for dose comparison. With 360 acquisition of CBCT and high-resolution reconstruction, the uniformity of CT number distribution was improved and the otherwise large variations for background and high-density materials were reduced significantly. The dose difference between FBCT and CBCT was < 2% in phantoms. In the Rando phantom and the patients, the dose-volume histograms were similar. The corresponding isodose curves covering {>=} 90% of prescribed dose on FBCT and CBCT were close to each other (within 2 mm). Most dosimetric differences were from the setup errors related to the interval changes in body shape and tumor response. The specific CBCT acquisition, reconstruction, and CT number modification can generate accurate dose calculation for the potential use in adaptive radiotherapy.

  5. Paediatric head injuries treated in a children's emergency department from Cluj-Napoca, Romania.

    Science.gov (United States)

    Rus, Diana; Chereches, Razvan Mircea; Peek-Asa, Corinne; Marton-Vasarhely, Emanuela Oana; Oprescu, Florin; Brinzaniuc, Alexandra; Mocean, Floarea

    2016-06-01

    The aim of the study was to describe paediatric head injuries and identify factors that led to advanced care. Incident cases of head injuries that sought care from December 2008 to October 2010 at Children's Emergency Hospital Cluj-Napoca were evaluated. The main outcome was transfer or admission to advanced care. From a total of 3053 children treated for an injury, 1541 (50.4%) presented with head injury. A total of 960 (62.3%) of the children with a head injury required advanced care treatment. Young children were more likely to suffer a head injury than older children, but a higher proportion of older children required advanced care (70.3%). Children who suffered a head injury as a consequence of road traffic were almost five times more likely to require advanced care (OR: 4.97; 3.09-8.06) than being released. Our results suggest that data on injuries provide evidence-based information on the nature of injuries children are prone to, and what activity, type, and mechanism of injury impact Romanian children. PMID:24479864

  6. Paul Collier : Balancing beams

    CERN Multimedia

    2009-01-01

    As former head of AB Operations, Paul Collier and his group were in the ‘cockpit’ for the LHC’s maiden voyage - piloting the first beam around the ring. But now, as Head of the Beams Department, he will need his feet firmly on the ground in order to balance all the beam activities at CERN. "As Department Head, I’ll have less direct contact with the machines," Collier says with a hint of regret. "I’ll still obviously be very involved, but they won’t actually let me loose in front of the keyboard anymore!" As the new Head of the BE Department, Collier will be in charge of nearly 400 people, and will oversee all the beam activities, including the preparations for the longest period of beam operation in the history of CERN. In the new organization, the BE, TE and EN Departments have been grouped together in the Accelerator and Technology Sector. "‘Partnership’ is a key word for the three departments," says Collier. "The n...

  7. Proton Beam Therapy as a Nonsurgical Approach to Mucosal Melanoma of the Head and Neck: A Pilot Study

    International Nuclear Information System (INIS)

    Purpose: The aim of this pilot study was to assess the clinical benefit of proton beam therapy for mucosal melanoma of the head and neck. Methods and Materials: Patients with mucosal melanoma of the head and neck with histologically confirmed malignant melanoma and N0 and M0 disease were enrolled. Proton therapy was delivered three times per week with a planned total dose of 60 Gy equivalents (GyE) in 15 fractions. Results: Fourteen consecutive patients were enrolled from January 2004 through February 2008. Patient characteristics were as follows: median age 73 years old (range, 56 to 79 years); male/female ratio, 7/7; and T stage 1/2/3/4, 3/2/0/9. All patients were able to receive the full dose of proton therapy. The most common acute toxicities were mucositis (grade 3, 21%) and mild dermatitis (grade 3, 0%). As for late toxicity, 2 patients had a unilateral decrease in visual acuity, although blindness did not occur. No treatment-related deaths occurred throughout the study. Initial local control rate was 85.7%, and, with a median follow-up period of 36.7 months, median progression-free survival was 25.1 months, and 3-year overall survival rates were 58.0%. The most frequent site of first failure was cervical lymph nodes (6 patients), followed by local failure in 1 patient and lung metastases in 1 patient. On follow-up, 5 patients died of disease, 4 died due to cachexia caused by distant metastases, and 1 patient by carotid artery perforation cause by lymph nodes metastases. Conclusions: Proton beam radiotherapy showed promising local control benefits and would benefit from ongoing clinical study.

  8. 8 June 2010 - South Dakota Governor M. Rounds signing the guest book with External Relations Office Adviser R. Voss, visiting the LHC superconducting Magnet test hall with Technology Department L. Bottura, in the CERN Control Centre with Beams Department Head P. Collier, ATLAS visitor Centre with Deputy Collaboration Spokesperson A. Lankford and visiting CMS Control Centre with Deputy Collaboration Spokesperson J. Incandela. LHC Communications and FNAL member K. Yurkewicz accompanies throughout (see complete delegation list below).

    CERN Multimedia

    Teams (M. Brice/J.C. Gadmer)

    2010-01-01

    CERN-HI-1006100 24: from left to right: Permanent Mission Representative A. Shybut; External Relations Office Adviser R. Voss; LHC Communications and FNAL K. Yurkewicz, Washington CSG Director for internationl programmes S. Sutcliffe-Stephenson; Technology Department Representative L. Bottura; South Dakota State Patrol D. Svendsen; CSG Executive Director and Former State Senator from Kansas D. Atkins;Office of the First Lady L. Svendsen; Office of the Governor K. Mueller; First Lady J. Rounds; South Dakota Governor M. Rounds; Washington State Senator T. Eide;Judge M. Eide; Assemblyman J. Oceguera and G. Oceguera (with son Jackson Oceguera, 5 months).

  9. Three-dimensional image analysis of a head of the giant panda by the cone-beam type CT

    International Nuclear Information System (INIS)

    The cone-beam type CT (Computed Tomography) enabled us to collect the three-dimensional (3D) digitalized data directly from the animal carcass. In this study, we applied the techniques of the cone-beam type CT for a carcass head of the giant panda (Ailuropoda melanoleuca) to obtain the 3D images easily without reconstruction process, and could morphologically examine the sections from the 3D data by means of non-destructive observations. The important results of the study represent the two following points. 1) We could show the morphological relationships between the muscles of mastication and the mandible in non-destructive status from the 3D data. The exact position of the coronoid process could be recognized in the rostro-lateral space of the temporal fossa. 2) By the serial sections from the 3D data sets, the morphological characteristics in the nasal cavity were detailed with high resolution in this rare species. The nasal concha was well-developed in the nasal cavity. The ethmoidal labyrinth was encountered immediately caudal to the nasal cavity and close to the region of the olfactory bulb. The ethmoidal labyrinth consisted of the complicated osseous structure in this area. The data will be useful to discuss the olfactory function in the reproduction behavior of this species

  10. Prof. John Wood, Chief Executive Designate, Dr Gordon Walker, Directorate, Chief Executive, Prof. Ken J. Peach, Head of the Particle Physics Department, CLRC Rutherford Appleton Laboratory, United Kingdom

    CERN Multimedia

    Patrice Loïez

    2001-01-01

    L. to. r.: Dr. Ian Wilson, CLIC Deputy Study Leader, Prof. Ken J. Peach, Head of the Particle Physics Department, Prof. John Wood, Chief Executive Designate, Dr. Gordon Walker, Directorate, Chief Executive

  11. 28 May 2010 - Japanese Ambassador H. Ueda visiting the LHC superconducting magnet test hall with CERN Technology Deputy Department Head L. Rossi.

    CERN Multimedia

    Maximilien Brice

    2010-01-01

    CERN-HI-1005088 02 Japanese Ambassador H. Ueda (right) visiting the LHC superconducting magnet test hall with Technology Deputy Department Head L. Rossi(left). H. Ueda is accompanied by KEK and ATLAS Collaboration T. Kondo (centre).

  12. Evaluation of detector readout gain mode and bowtie filters for cone-beam CT imaging of the head

    Science.gov (United States)

    Xu, Jennifer; Sisniega, Alejandro; Zbijewski, Wojciech; Dang, Hao; Webster Stayman, J.; Wang, Xiaohui; Foos, David H.; Aygun, Nafi; Koliatsos, Vassillis E.; Siewerdsen, Jeffrey H.

    2016-08-01

    The effects of detector readout gain mode and bowtie filters on cone-beam CT (CBCT) image quality and dose were characterized for a new CBCT system developed for point-of-care imaging of the head, with potential application to diagnosis of traumatic brain injury, intracranial hemorrhage (ICH), and stroke. A detector performance model was extended to include the effects of detector readout gain on electronic digitization noise. The noise performance for high-gain (HG), low-gain (LG), and dual-gain (DG) detector readout was evaluated, and the benefit associated with HG mode in regions free from detector saturation was quantified. Such benefit could be realized (without detector saturation) either via DG mode or by incorporation of a bowtie filter. Therefore, three bowtie filters were investigated that varied in thickness and curvature. A polyenergetic gain correction method was developed to equalize the detector response between the flood-field and projection data in the presence of a bowtie. The effect of bowtie filters on dose, scatter-to-primary ratio, contrast, and noise was quantified in phantom studies, and results were compared to a high-speed Monte Carlo (MC) simulation to characterize x-ray scatter and dose distributions in the head. Imaging in DG mode improved the contrast-to-noise ratio (CNR) by ~15% compared to LG mode at a dose (D 0, measured at the center of a 16 cm CTDI phantom) of 19 mGy. MC dose calculations agreed with CTDI measurements and showed that bowtie filters reduce peripheral dose by as much as 50% at the same central dose. Bowtie filters were found to increase the CNR per unit square-root dose near the center of the image by ~5–20% depending on bowtie thickness, but reduced CNR in the periphery by ~10–40%. Images acquired at equal CTDIw with and without a bowtie demonstrated a 24% increase in CNR at the center of an anthropomorphic head phantom. Combining a thick bowtie filter with a short arc (180°  +  fan angle) scan

  13. IMPROVING THE EFFICIENCY OF IRRIGATION AT THE LOCAL RUNOFF, ASSEMBLED IN BEAMS OF LOW-HEAD DAMS WITH IMPROVED PERFORMANCE CHARACTERISTICS

    OpenAIRE

    Vasilyeva E. V.

    2015-01-01

    The article presents data on the survey of beamed ponds and dams on the beams of Berestova, Shcherbakova and Gruzskoe on the territory of the Rostov region and establishes their poor condition. To use the ponds as a water source for irrigation of surrounding agricultural land, it is necessary to conduct repairing work on water ponds. In the article, to improve the efficiency of irrigation on local runoff, delayed in beams of low head dams we have proposed an improved design of fastenings (coa...

  14. A prospective observational study to assess the diagnostic accuracy of clinical decision rules for children presenting to emergency departments after head injuries (protocol): the Australasian Paediatric Head Injury Rules Study (APHIRST)

    OpenAIRE

    Babl, Franz E; Lyttle, Mark D; Bressan, Silvia; Borland, Meredith; Phillips, Natalie; Kochar, Amit; Stuart R Dalziel; Dalton, Sarah; Cheek, John A; Furyk, Jeremy; Gilhotra, Yuri; Neutze, Jocelyn; Ward, Brenton; Donath, Susan; Jachno, Kim

    2014-01-01

    Background Head injuries in children are responsible for a large number of emergency department visits. Failure to identify a clinically significant intracranial injury in a timely fashion may result in long term neurodisability and death. Whilst cranial computed tomography (CT) provides rapid and definitive identification of intracranial injuries, it is resource intensive and associated with radiation induced cancer. Evidence based head injury clinical decision rules have been derived to aid...

  15. Quantum radiation reaction in head-on laser-electron beam interaction

    CERN Document Server

    Vranic, Marija; Fonseca, Ricardo A; Silva, Luis O

    2015-01-01

    In this paper, we investigate the evolution of the energy spread and the divergence of electron beams while they interact with different laser pulses at intensities where quantum effects and radiation reaction are of relevance. The interaction is modeled with a QED-PIC code and the results are compared with those obtained with a standard PIC code with the addition of a classical radiation reaction module and with theoretical predictions. While classical radiation reaction is a continuous process, in QED, radiation emission is stochastic. The two pictures reconcile in the limit when the emitted photons energy is small compared to the energy of the emitting electrons. The energy spread of the electron distribution function always tends to decrease with classical radiation reaction, whereas the stochastic QED emission can also enlarge it. These two tendencies compete in the QED-dominated regime. Our analysis, supported by the QED module, reveals an upper limit to the maximal attainable energy spread due to stoch...

  16. Study of air cavities influence in head and neck radiotherapy with 10 MV photon beam

    International Nuclear Information System (INIS)

    This is a study about dose distribution in the larynx region under irradiation with a 10 MV photon beam. This localization presents air cavities, that can compromise the dose at air-tissue interfaces by electronic equilibrium loss and backscattering lack. For this study, a parallel ionization chamber was used in the air cavities simulated with a perspex phantom. The influence of the air cavities in the proximal, distal and lateral interfaces was analysed. The results showed a expressive loss of dose at the air-tissue interface. For typical irradiation field and anatomic cavity, under dose values of 4% in the proximal interface, 11% in the distal interface and 7% in the lateral interface were found. Irradiation field larger than 6 X 6 cm2 were optimal in reducing the total effect of under dosing at the interface. (author). 39 refs, 23 figs, 12 tabs

  17. SU-E-T-403: Measurement of the Neutron Ambient Dose Equivalent From the TrueBeam Linac Head and Varian 2100 Clinac

    International Nuclear Information System (INIS)

    Purpose: High-energy x-ray therapy produces an undesirable source of stray neutron dose to healthy tissues, and thus, poses a risk for second cancer induction years after the primary treatment. Hence, the purpose of this study was to measure the neutron ambient dose equivalent, H*(10), produced from the TrueBeam and Varian 2100 linac heads, respectively. Of particular note is that there is no measured data available in the literature on H*(10) production from the TrueBeam treatment head. Methods: Both linacs were operated in flattening filter mode using a 15 MV x-ray beam on TrueBeam and an 18 MV x-ray beam for the Varian 2100 Clinac with the jaws and multileaf collimators in the fully closed position. A dose delivery rate of 600 MU/min was delivered on the TrueBeam and the Varian 2100 Clinac, respectively and the H*(10) rate was measured in triplicate using the WENDI-2 detector located at multiple positions including isocenter and longitudinal (gun-target) to the isocenter. Results: For each measurement, the H*(10) rate was relatively constant with increasing distance away from the isocenter with standard deviations on the order of a tenth of a mSv/h or less for the given beam energy. In general, fluctuations in the longitudinal H*(10) rate between the anterior-posterior couch directions were approximately a percent for both beam energies. Conclusion: Our preliminary results suggest an H*(10) rate of about 30 mSv/h (40 mSv/h) or less for TrueBeam (Varian Clinac 2100) for all measurements considered in this study indicating a relatively low contribution of produced secondary neutrons to the primary therapeutic beam

  18. Beam Path Toxicities to Non-Target Structures During Intensity-Modulated Radiation Therapy for Head and Neck Cancer

    International Nuclear Information System (INIS)

    Background: Intensity-modulated radiation therapy (IMRT) beams traverse nontarget normal structures not irradiated during three-dimensional conformal RT (3D-CRT) for head and neck cancer (HNC). This study estimates the doses and toxicities to nontarget structures during IMRT. Materials and Methods: Oropharyngeal cancer IMRT and 3D-CRT cases were reviewed. Dose-volume histograms (DVH) were used to evaluate radiation dose to the lip, cochlea, brainstem, occipital scalp, and segments of the mandible. Toxicity rates were compared for 3D-CRT, IMRT alone, or IMRT with concurrent cisplatin. Descriptive statistics and exploratory recursive partitioning analysis were used to estimate dose 'breakpoints' associated with observed toxicities. Results: A total of 160 patients were evaluated for toxicity; 60 had detailed DVH evaluation and 15 had 3D-CRT plan comparison. Comparing IMRT with 3D-CRT, there was significant (p ≤ 0.002) nonparametric differential dose to all clinically significant structures of interest. Thirty percent of IMRT patients had headaches and 40% had occipital scalp alopecia. A total of 76% and 38% of patients treated with IMRT alone had nausea and vomiting, compared with 99% and 68%, respectively, of those with concurrent cisplatin. IMRT had a markedly distinct toxicity profile than 3D-CRT. In recursive partitioning analysis, National Cancer Institute's Common Toxicity Criteria adverse effects 3.0 nausea and vomiting, scalp alopecia and anterior mucositis were associated with reconstructed mean brainstem dose >36 Gy, occipital scalp dose >30 Gy, and anterior mandible dose >34 Gy, respectively. Conclusions: Dose reduction to specified structures during IMRT implies an increased beam path dose to alternate nontarget structures that may result in clinical toxicities that were uncommon with previous, less conformal approaches. These findings have implications for IMRT treatment planning and research, toxicity assessment, and multidisciplinary patient

  19. Power to Do...What? Department Heads' Decision Autonomy and Strategic Priorities

    Science.gov (United States)

    Bozeman, Barry; Fay, Daniel; Gaughan, Monica

    2013-01-01

    Using questionnaire data from the 2010 Survey of Academic Chairs, the study focuses on decision autonomy, a component of the power wielded by science, technology, engineering and mathematics (STEM) department chairs in U.S. research extensive universities. A "power index" is developed to measure chairs' decision autonomy, specifically their…

  20. IMPROVING THE EFFICIENCY OF IRRIGATION AT THE LOCAL RUNOFF, ASSEMBLED IN BEAMS OF LOW-HEAD DAMS WITH IMPROVED PERFORMANCE CHARACTERISTICS

    Directory of Open Access Journals (Sweden)

    Vasilyeva E. V.

    2015-02-01

    Full Text Available The article presents data on the survey of beamed ponds and dams on the beams of Berestova, Shcherbakova and Gruzskoe on the territory of the Rostov region and establishes their poor condition. To use the ponds as a water source for irrigation of surrounding agricultural land, it is necessary to conduct repairing work on water ponds. In the article, to improve the efficiency of irrigation on local runoff, delayed in beams of low head dams we have proposed an improved design of fastenings (coatings of upland slopes of groundwater retaining structures, including the ranks of absorbing wave elements. We have recommended symmetric and asymmetric placement of the semi-oval and tapered parts. We have also proposed a simple solution of wave absorbing elements as parts of a triangular shape (isosceles and equilateral, mutual accommodation of which also forms a water conveyance channels for mutual collision of threads

  1. Nonlinear beam-beam resonances

    International Nuclear Information System (INIS)

    Head-on collisions of bunched beams are considered, assuming the two colliding beams have opposite charges. A few experimental observations are described. The single resonance analysis is developed that is applicable to the strong-weak case of the beam-beam interaction. In this case, the strong beam is unperturbed by the beam-beam interaction; motions of the weak beam particles are then analyzed in the presence of the nonlinear electromagnetic force produced by the strong beam at the collision points. The coherent motions of the two coupled strong beams are shown to exhibit distinct nonlinear resonance behavior. 16 refs., 22 figs

  2. Modeling and design of a cone-beam CT head scanner using task-based imaging performance optimization

    Science.gov (United States)

    Xu, J.; Sisniega, A.; Zbijewski, W.; Dang, H.; Stayman, J. W.; Wang, X.; Foos, D. H.; Aygun, N.; Koliatsos, V. E.; Siewerdsen, J. H.

    2016-04-01

    Detection of acute intracranial hemorrhage (ICH) is important for diagnosis and treatment of traumatic brain injury, stroke, postoperative bleeding, and other head and neck injuries. This paper details the design and development of a cone-beam CT (CBCT) system developed specifically for the detection of low-contrast ICH in a form suitable for application at the point of care. Recognizing such a low-contrast imaging task to be a major challenge in CBCT, the system design began with a rigorous analysis of task-based detectability including critical aspects of system geometry, hardware configuration, and artifact correction. The imaging performance model described the three-dimensional (3D) noise-equivalent quanta using a cascaded systems model that included the effects of scatter, scatter correction, hardware considerations of complementary metal-oxide semiconductor (CMOS) and flat-panel detectors (FPDs), and digitization bit depth. The performance was analyzed with respect to a low-contrast (40-80 HU), medium-frequency task representing acute ICH detection. The task-based detectability index was computed using a non-prewhitening observer model. The optimization was performed with respect to four major design considerations: (1) system geometry (including source-to-detector distance (SDD) and source-to-axis distance (SAD)); (2) factors related to the x-ray source (including focal spot size, kVp, dose, and tube power); (3) scatter correction and selection of an antiscatter grid; and (4) x-ray detector configuration (including pixel size, additive electronics noise, field of view (FOV), and frame rate, including both CMOS and a-Si:H FPDs). Optimal design choices were also considered with respect to practical constraints and available hardware components. The model was verified in comparison to measurements on a CBCT imaging bench as a function of the numerous design parameters mentioned above. An extended geometry (SAD  =  750 mm, SDD  =  1100

  3. Modeling and design of a cone-beam CT head scanner using task-based imaging performance optimization.

    Science.gov (United States)

    Xu, J; Sisniega, A; Zbijewski, W; Dang, H; Stayman, J W; Wang, X; Foos, D H; Aygun, N; Koliatsos, V E; Siewerdsen, J H

    2016-04-21

    Detection of acute intracranial hemorrhage (ICH) is important for diagnosis and treatment of traumatic brain injury, stroke, postoperative bleeding, and other head and neck injuries. This paper details the design and development of a cone-beam CT (CBCT) system developed specifically for the detection of low-contrast ICH in a form suitable for application at the point of care. Recognizing such a low-contrast imaging task to be a major challenge in CBCT, the system design began with a rigorous analysis of task-based detectability including critical aspects of system geometry, hardware configuration, and artifact correction. The imaging performance model described the three-dimensional (3D) noise-equivalent quanta using a cascaded systems model that included the effects of scatter, scatter correction, hardware considerations of complementary metal-oxide semiconductor (CMOS) and flat-panel detectors (FPDs), and digitization bit depth. The performance was analyzed with respect to a low-contrast (40-80 HU), medium-frequency task representing acute ICH detection. The task-based detectability index was computed using a non-prewhitening observer model. The optimization was performed with respect to four major design considerations: (1) system geometry (including source-to-detector distance (SDD) and source-to-axis distance (SAD)); (2) factors related to the x-ray source (including focal spot size, kVp, dose, and tube power); (3) scatter correction and selection of an antiscatter grid; and (4) x-ray detector configuration (including pixel size, additive electronics noise, field of view (FOV), and frame rate, including both CMOS and a-Si:H FPDs). Optimal design choices were also considered with respect to practical constraints and available hardware components. The model was verified in comparison to measurements on a CBCT imaging bench as a function of the numerous design parameters mentioned above. An extended geometry (SAD  =  750 mm, SDD  =  1100

  4. Use of External Beam Radiotherapy Is Associated With Reduced Incidence of Second Primary Head and Neck Cancer: A SEER Database Analysis

    International Nuclear Information System (INIS)

    Purpose: Patients with head and neck cancer have a significant risk of developing a second primary cancer of the head and neck. We hypothesized that treatment with external beam radiotherapy (RT) might reduce this risk, because RT can eradicate occult foci of second head and neck cancer (HNCA). Methods and Materials: The data of patients with Surveillance, Epidemiology, and End Results Historic Stage A localized squamous cell carcinoma of the oral cavity, larynx, and pharynx were queried using the Surveillance, Epidemiology, and End Results database. For patients treated with or without RT, the incidence of second HNCA was determined and compared using the log-rank method. Cox proportional hazards analysis was performed for each site, evaluating the influence of covariates on the risk of second HNCA. Results: Between 1973 and 1997, 27,985 patients were entered with localized HNCA. Of these patients, 44% had received RT and 56% had not. The 15-year incidence of second HNCA was 7.7% with RT vs. 10.5% without RT (hazard ratio 0.71, p <0.0001). The effect of RT was more profound in patients diagnosed between 1988 and 1997 (hazard ratio 0.53, p <0.0001) and those with pharynx primaries (hazard ratio 0.47, p <0.0001). On multivariate analysis, RT was associated with a reduced risk of second HNCA for pharynx (p <0.0001) and larynx (p = 0.04) tumors. For oral cavity primaries, RT was associated with an increased risk of second HNCA in patients treated before 1988 (p <0.001), but had no influence on patients treated between 1988 and 1997 (p = 0.91). Conclusion: For localized HNCA, RT is associated with a reduced incidence of second HNCA. These observations are consistent with the eradication of microscopic foci of second HNCA with external beam RT

  5. Performance Management Guided by the Head of Department%科主任主导下的绩效管理

    Institute of Scientific and Technical Information of China (English)

    刘志勤

    2014-01-01

    在县区及基层医院逐步推进药品零差价的进程中,省市级医院也必须逐步跟进,而在基本无政府补助的情况下,如何保障医院的正常运行?如何确保员工的薪资收入?如何保障科教研投入?必须从降低经营成本、管理成本,以及调整医疗结构、提升运营效益入手。因此,加强绩效管理成为医院必须的“变革”。我院采用Kotter变革管理模型,实施科主任主导的绩效管理变革,通过两年多的实践,取得了良好的效果。%When county and primary hospitals progressively carried forward the policy of zero price markup of medicine, provincial and municipal hospitals should also gradually keep up. However, without the basic governmental subsidies, how to maintain the normal operation of the hospital? How to ensure that staff salaries and income? How to guarantee the input into the science, teaching and research? To deal with those issues, it should be approached from reducing operating and management costs, adjusting medical structure, and enhancing operational efficiency. Therefore, it is the requisite“change”for the hospital to strengthen“Performance Management”. Our hospital introduced Kotter Change Management Model, carried out“Performance Management”guided by the head of department, and has achieved good results after two years of practice.

  6. 1 April 2014 - President of the Parliament of the Principality of Liechtenstein A. Frick and his delegation visiting the LHC tunnel at Point 1 with Technology Department Head J.M. Jiménez and signing the Guest book with CERN Director-General R. Heuer. Deputy Head of International Relations E. Tsesmelis present throughout.

    CERN Multimedia

    Pantelia, Anna

    2014-01-01

    1 April 2014 - President of the Parliament of the Principality of Liechtenstein A. Frick and his delegation visiting the LHC tunnel at Point 1 with Technology Department Head J.M. Jiménez and signing the Guest book with CERN Director-General R. Heuer. Deputy Head of International Relations E. Tsesmelis present throughout.

  7. 30th November 2010 - Norwegian Ministry of Government Administration, Reform and Church Affairs State Secretary R. Valle signing the guest book with Head of International Relations F. Pauss and Director for Research and Scientific Computing S. Bertolucci; visiting CERN Computer Centre with Information Technology Department Head F. Hemmer.

    CERN Multimedia

    Maximilien Brice

    2010-01-01

    30th November 2010 - Norwegian Ministry of Government Administration, Reform and Church Affairs State Secretary R. Valle signing the guest book with Head of International Relations F. Pauss and Director for Research and Scientific Computing S. Bertolucci; visiting CERN Computer Centre with Information Technology Department Head F. Hemmer.

  8. 14th March 2011 - Australian Senator the Hon. K. Carr Minister for Innovation, Industry, Science and Research in the ATLAS Visitor Centre with Collaboration Spokesperson F. Gianotti,visiting the SM18 area with G. De Rijk,the Computing centre with Department Head F. Hemmer, signing the guest book with Director-General R. Heuer with Head of International relations F. Pauss

    CERN Multimedia

    Jean-claude Gadmer

    2011-01-01

    14th March 2011 - Australian Senator the Hon. K. Carr Minister for Innovation, Industry, Science and Research in the ATLAS Visitor Centre with Collaboration Spokesperson F. Gianotti,visiting the SM18 area with G. De Rijk,the Computing centre with Department Head F. Hemmer, signing the guest book with Director-General R. Heuer with Head of International relations F. Pauss

  9. 5 June 2013 - European Union Ambassador to Switzerland and the Principality of Liechtenstein R. Jones in the ATLAS cavern with ATLAS Collaboration Deputy Spokesperson T. Wengler, in the LHC tunnel at Point 1 with Technology Department Head F. Bordry and signing the guest book with Director-General R. Heuer. Head of the EU Projects Office S. Stavrev present.

    CERN Multimedia

    Jean-Claude Gadmer

    2013-01-01

    5 June 2013 - European Union Ambassador to Switzerland and the Principality of Liechtenstein R. Jones in the ATLAS cavern with ATLAS Collaboration Deputy Spokesperson T. Wengler, in the LHC tunnel at Point 1 with Technology Department Head F. Bordry and signing the guest book with Director-General R. Heuer. Head of the EU Projects Office S. Stavrev present.

  10. 17 January 2014 - Y. Sakurada Japanese Senior Vice Minister of Education, Culture, Sports, Science and Technology signing the Guest book with CERN Director-General R. Heuer and visiting the LHC tunnel at Point 1 with Technology Department Head J.M. Jiménez. Head of International Relations R. Voss present throughout.

    CERN Multimedia

    Pantelia, Anna

    2014-01-01

    17 January 2014 - Y. Sakurada Japanese Senior Vice Minister of Education, Culture, Sports, Science and Technology signing the Guest book with CERN Director-General R. Heuer and visiting the LHC tunnel at Point 1 with Technology Department Head J.M. Jiménez. Head of International Relations R. Voss present throughout.

  11. 5 December 2011 - Chilean President of the Comision Nacional de Investigacion Cientifica y Tecnologica J. M. Aguilera in the ATLAS visitor centre with Adviser J. Salicio Diez and ATLAS Collaboration G. Mikenberg; signing the guest book with Head of International Relations F. Pauss; visiting the LHC superconducting magnet test hall with Department Head F. Bordry.

    CERN Multimedia

    VMO Team

    2011-01-01

    5 December 2011 - Chilean President of the Comision Nacional de Investigacion Cientifica y Tecnologica J. M. Aguilera in the ATLAS visitor centre with Adviser J. Salicio Diez and ATLAS Collaboration G. Mikenberg; signing the guest book with Head of International Relations F. Pauss; visiting the LHC superconducting magnet test hall with Department Head F. Bordry.

  12. 23rd August 2011 - Turkish Representatives of the Union of Chambers and Commodity Exchanges, E. Uluatam and S. Kologlu, visiting the LHC superconducting magnet test hall with Engineering Department Head R. Saban.

    CERN Multimedia

    Benoit Jeannet

    2011-01-01

    23rd August 2011 - Turkish Representatives of the Union of Chambers and Commodity Exchanges, E. Uluatam and S. Kologlu, visiting the LHC superconducting magnet test hall with Engineering Department Head R. Saban.

  13. 25 February 2013- President A. Acar of the Turkish Middle East Technical University signing the guest book with Engineering Department Head R. Saban and Adviser for Relations with Turkey E. Tsesmelis.

    CERN Multimedia

    Samuel Morier-Genoud

    2013-01-01

    25 February 2013- President A. Acar of the Turkish Middle East Technical University signing the guest book with Engineering Department Head R. Saban and Adviser for Relations with Turkey E. Tsesmelis.

  14. 4 April 2013 - Spanish State Secretary of Science, Development and Innovation C. Vela Olmo in the LHC tunnel with Technology Department Head F. Bordry and signing the guest book with CERN Director-General R. Heuer.

    CERN Multimedia

    Anna Pantelia

    2013-01-01

    4 April 2013 - Spanish State Secretary of Science, Development and Innovation C. Vela Olmo in the LHC tunnel with Technology Department Head F. Bordry and signing the guest book with CERN Director-General R. Heuer.

  15. 29 May 2013 - Rector Politecnico di Torino M. Gilli in the ATLAS experimental cavern with L. Pontecorvo (ATLAS Collaboration) and in the LHC tunnel at Point 1 with Engineering Department Head R. Saban.

    CERN Multimedia

    VMO

    2013-01-01

    29 May 2013 - Rector Politecnico di Torino M. Gilli in the ATLAS experimental cavern with L. Pontecorvo (ATLAS Collaboration) and in the LHC tunnel at Point 1 with Engineering Department Head R. Saban.

  16. Wolfsberg Executive Director P. Guptara at ATLAS experiment with ATLAS Resources Coordinator M. Nordberg, LHC machine Technical Coordination and Planning P. Proudlock and Information Technology Department Head W. von Rüden on 21 September 2006.

    CERN Multimedia

    Maximilien Brice

    2006-01-01

    Wolfsberg Executive Director P. Guptara at ATLAS experiment with ATLAS Resources Coordinator M. Nordberg, LHC machine Technical Coordination and Planning P. Proudlock and Information Technology Department Head W. von Rüden on 21 September 2006.

  17. March 2008 - ITER Organization Director-General K.Ikeda and Deputy Director-General N. Holtkamp, visiting the ATLAS cavern with Spokesperson P. Jenni, Accelerators Technology Department Head P. Lebrun and LHC Mangnets Group Leader L. Rossi.

    CERN Multimedia

    Claudia Marcelloni

    2008-01-01

    March 2008 - ITER Organization Director-General K.Ikeda and Deputy Director-General N. Holtkamp, visiting the ATLAS cavern with Spokesperson P. Jenni, Accelerators Technology Department Head P. Lebrun and LHC Mangnets Group Leader L. Rossi.

  18. 24th May 2011 - ITER Organization Director-General O.Motojima visiting SM18 with Technology Department Head F. Bordry and Deputy L. Rossi, accompanied by Adviser for Relations with ITER J.-P. Koutchouk.

    CERN Multimedia

    Maximilien Brice

    2011-01-01

    24th May 2011 - ITER Organization Director-General O.Motojima visiting SM18 with Technology Department Head F. Bordry and Deputy L. Rossi, accompanied by Adviser for Relations with ITER J.-P. Koutchouk.

  19. Extent of Implementing the Total Quality Management Principles by Academic Departments Heads at Najran University from Faculty Members' Perspectives

    Science.gov (United States)

    Al-Din, Hesham Moustafa Kamal; Abouzid, Mohamed Mahmoud

    2016-01-01

    This study aimed to identify the implementing degree of Total Quality Management (TQM) principals by Academic Departmental Heads (ADH) at the Najran University from faculty members' perspectives. It also aimed to determine significant differences between the average estimate of sample section of faculty members about the implementing degree of TQM…

  20. Molecular beams research in the chemistry department of the Complutense university: progress over a decade

    International Nuclear Information System (INIS)

    This paper reports on the progress made over nearly a decade (1980-1990) by the Molecular Beam Group in the Complutense University of Madrid. After the author's stay in the United States as Prof. R.B Bernstein's post doc everything here had to be done from scratch. Designing the apparatus; importing all the equipment; overcoming huge bureaucracy: buying screws, welding, plumbing, etc. Essentially the following experimental techniques were set up: crossed-beam techniques to measure total and differential reaction cross-section for ground and/or excited species. Reaction Energy threshold and excitation functions for elementary chemical reactions. Molecular Beam chemiluminescence either in crossed-beam and beam-gas conditions. Laser-induced fluorescence and laser-induced charge transfer processes in beams and crossed-beam conditions, respectively. The chemiionization technique in crossed-beams was also set up. Our group pioneered: (a) the measurement of high resolution threshold energies and total reaction cross-section (also in absolute units) for many reactions; (b) the production of highly intense pulsed beams of electronically excited atoms; (c) the measurement under high resolution of the crossed-beam dynamics of excited species; (d) the measurement of the role of alkyl groups in the dynamics (stereodynamics) of chemical reactions; (e) the measurement of the spin-orbit effects in laser-induced charge transfer processes; (f) the developing of a novel technique, using the time-of-flight method under crossed-beam conditions, that is able to measure existing quantum effects in the total reaction cross-section; (g) the measurement of dissociation energies of radicals with less than 1% of experimental error. (Author) 76 refs. 32 fig

  1. Evaluation of image quality for different kV cone-beam CT acquisition and reconstruction methods in the head and neck region

    Energy Technology Data Exchange (ETDEWEB)

    Elstroem, Ulrik V.; Muren, Ludvig P. (Dept. of Oncology, Aarhus Univ. Hospital, Aarhus (Denmark); Dept. of Medical Physics, Aarhus Univ. Hospital, Aarhus (Denmark)), e-mail: ulrielst@rm.dk; Petersen, Joergen B. B. (Dept. of Medical Physics, Aarhus Univ. Hospital, Aarhus (Denmark)); Grau, Cai (Dept. of Oncology, Aarhus Univ. Hospital, Aarhus (Denmark))

    2011-08-15

    Purpose. To evaluate the image quality obtained in a standard QA phantom with both clinical and non-clinical cone-beam computed tomography (CBCT) acquisition modes for the head and neck (HN) region as a step towards CBCT-based treatment planning. The impact of deteriorated Hounsfield unit (HU) accuracy was investigated by comparing results from clinical CBCT image reconstructions to those obtained from a pre-clinical scatter correction algorithm. Methods. Five different CBCT acquisition modes on a clinical system for kV CBCT-guided radiotherapy were investigated. Image reconstruction was performed in both standard clinical software and with an experimental reconstruction algorithm with improved beam hardening and scatter correction. Using the Catphan 504 phantom, quantitative measures of HU uniformity, HU verification and linearity, contrast-to-noise ratio (CNR), and spatial resolution using modulation transfer function (MTF) estimation were assessed. To benchmark the CBCT image properties, comparison to standard HN protocols on conventional CT scanners was performed by similar measures. Results. The HU uniformity within a water-equivalent homogeneous region was considerably improved using experimental vs. standard reconstruction, by factors of two for partial scans and four for full scans. Similarly, the amount of capping/cupping artifact was reduced by more than 1.5%. With mode and reconstruction specific HU calibration using seven inhomogeneity inserts comparable HU linearity was observed. CNR was on average 5% higher for experimental reconstruction (scaled with the square-root of dose between modes for both reconstruction methods). Conclusions. Judged on parameters affecting the common diagnostic image properties, improved beam hardening and scatter correction diminishes the difference between CBCT and CT image quality considerably. In the pursuit of CBCT-based treatment adaptation, dedicated imaging protocols may be required

  2. Audit of high energy therapy beams in hospital oncology departments by the National Radiation Laboratory

    International Nuclear Information System (INIS)

    In 1993 the output of every high energy radiotherapy beam used clinically in New Zealand was measured by National Radiation Laboratory (NRL) staff using independent dosimetry equipment. The purpose of this was to audit the dosimetry that is used by hospital physicists for the basis of patient treatments, and to uncover any errors that may be clinically significant. This report analyses the uncertainties involved in comparing the NRL and hospital measurements, and presents the results of the 1993 audit. The overall uncertainty turns out to be about 1.5%. The results for linear accelerator photon beams are consistent with a purely random variation within this uncertainty. Electron beams show some small errors beyond the expected uncertainty. Gamma beams have the potential to be the most accurately measured, but in practice are less accurately measured than linear accelerator beams. None of the disagreements indicated an error of clinical significance. 8 refs., 3 figs., 2 tabs

  3. 10 September 2013 - Italian Minister for Economic Development F. Zanonato visiting the ATLAS cavern with Collaboration Spokesperson D. Charlton and Italian scientists F. Gianotti and A. Di Ciaccio; signing the guest book with CERN Director-General R. Heuer and Director for Research and Scientific Computing S. Bertolucci; in the LHC tunnel with S. Bertolucci, Technology Deputy Department Head L. Rossi and Engineering Department Head R. Saban; visiting CMS cavern with Scientists G. Rolandi and P. Checchia.

    CERN Multimedia

    Jean-Claude Gadmer

    2013-01-01

    10 September 2013 - Italian Minister for Economic Development F. Zanonato visiting the ATLAS cavern with Collaboration Spokesperson D. Charlton and Italian scientists F. Gianotti and A. Di Ciaccio; signing the guest book with CERN Director-General R. Heuer and Director for Research and Scientific Computing S. Bertolucci; in the LHC tunnel with S. Bertolucci, Technology Deputy Department Head L. Rossi and Engineering Department Head R. Saban; visiting CMS cavern with Scientists G. Rolandi and P. Checchia.

  4. 28 August 2013 - Director of Technical Quality Management Head of ESTEC Establishment European Space Agency F. Ongaro visiting the LHC tunnel at Point 1 with Technology Department Head F. Bordry and Technology Department J.-P. Tock; visiting the ATLAS experimental area with ATLAS Deputy Spokesperson T. Wengler and signing the guest book with CERN Director-General R. Heuer. Accompanied throughout by F. Bordry and V. Parma.

    CERN Multimedia

    Jean-Claude Gadmer

    2013-01-01

    28 August 2013 - Director of Technical Quality Management Head of ESTEC Establishment European Space Agency F. Ongaro visiting the LHC tunnel at Point 1 with Technology Department Head F. Bordry and Technology Department J.-P. Tock; visiting the ATLAS experimental area with ATLAS Deputy Spokesperson T. Wengler and signing the guest book with CERN Director-General R. Heuer. Accompanied throughout by F. Bordry and V. Parma.

  5. 6th July 2010 - United Kingdom Science and Technology Facilities Council W. Whitehorn signing the guest book with Head of International relations F. Pauss, visiting the Computing Centre with Information Technology Department Head Deputy D. Foster, the LHC superconducting magnet test hall with Technology Department P. Strubin,the Centre Control Centre with Operation Group Leader M. Lamont and the CLIC/CTF3 facility with Project Leader J.-P. Delahaye.

    CERN Multimedia

    Teams : M. Brice, JC Gadmer

    2010-01-01

    6th July 2010 - United Kingdom Science and Technology Facilities Council W. Whitehorn signing the guest book with Head of International relations F. Pauss, visiting the Computing Centre with Information Technology Department Head Deputy D. Foster, the LHC superconducting magnet test hall with Technology Department P. Strubin,the Centre Control Centre with Operation Group Leader M. Lamont and the CLIC/CTF3 facility with Project Leader J.-P. Delahaye.

  6. 14th September 2011 - US Under Secretary for Science, Department of Energy S. Koonin signing the guest book with Head of International Relations F. Pauss.

    CERN Multimedia

    2011-01-01

    CERN-HI-1109234 48, from left to right: ALICE Collaboration USA National Coordination J. Harris, ATLAS Collaboration Deputy Spokesperson A. Lankford, Head of International Relations F. Pauss, Under Secretary for Science, Department of Energy S. Koonin, Adviser for the US R. Voss, Special Assistant to Under Secretary for Science C. Lin, CMS Collaboration Deputy Spokesperson and Spokesperson elect 2012-2013 J. Incandela and LHC Collaboration S. Stone.During his tour of the LHC superconducting magnet test hall he saw one of the superconducting inner-triplet magnets contributed by Fermilab to the LHC. His visit also included the CMS, ATLAS and ALICE experiments as well as the CERN Control Centre.

  7. Heads Up

    Science.gov (United States)

    ... top priority. Whether you are a parent , youth sports coach , school coach , school professional , or health care provider , this ... HEADS UP to Youth Sports HEADS UP to School Sports HEADS UP to Schools HEADS UP to Providers ...

  8. Image Guidance During Head-and-Neck Cancer Radiation Therapy: Analysis of Alignment Trends With In-Room Cone-Beam Computed Tomography Scans

    International Nuclear Information System (INIS)

    Purpose: On-board cone-beam computed tomography (CBCT) is currently available for alignment of patients with head-and-neck cancer before radiotherapy. However, daily CBCT is time intensive and increases the overall radiation dose. We assessed the feasibility of using the average couch shifts from the first several CBCTs to estimate and correct for the presumed systematic setup error. Methods and Materials: 56 patients with head-and-neck cancer who received daily CBCT before intensity-modulated radiation therapy had recorded shift values in the medial–lateral, superior–inferior, and anterior–posterior dimensions. The average displacements in each direction were calculated for each patient based on the first five or 10 CBCT shifts and were presumed to represent the systematic setup error. The residual error after this correction was determined by subtracting the calculated shifts from the shifts obtained using daily CBCT. Results: The magnitude of the average daily residual three-dimensional (3D) error was 4.8 ± 1.4 mm, 3.9 ± 1.3 mm, and 3.7 ± 1.1 mm for uncorrected, five CBCT corrected, and 10 CBCT corrected protocols, respectively. With no image guidance, 40.8% of fractions would have been >5 mm off target. Using the first five CBCT shifts to correct subsequent fractions, this percentage decreased to 19.0% of all fractions delivered and decreased the percentage of patients with average daily 3D errors >5 mm from 35.7% to 14.3% vs. no image guidance. Using an average of the first 10 CBCT shifts did not significantly improve this outcome. Conclusions: Using the first five CBCT shift measurements as an estimation of the systematic setup error improves daily setup accuracy for a subset of patients with head-and-neck cancer receiving intensity-modulated radiation therapy and primarily benefited those with large 3D correction vectors (>5 mm). Daily CBCT is still necessary until methods are developed that more accurately determine which patients may benefit from

  9. Effect of electron cyclotron resonance ion source frequency tuning on ion beam intensity and quality at Department of Physics, University of Jyvaeskylae

    International Nuclear Information System (INIS)

    Ion beam intensity and quality have a crucial effect on the operation efficiency of the accelerator facilities. This paper presents the investigations on the ion beam intensity and quality after the mass separation performed with the Department of Physics, University of Jyvaeskylae 14 GHz electron cyclotron resonance ion source by sweeping the microwave in the 14.05-14.13 GHz range. In many cases a clear variation in the ion beam intensity and quality as a function of the frequency was observed. The effect of frequency tuning increased with the charge state. In addition, clear changes in the beam structure seen with the beam viewer were observed. The results confirmed that frequency tuning can have a remarkable effect on ion beam intensity and quality especially in the case of highly charged ion beams. The examples presented here represent the typical charge state behavior observed during the measurements.

  10. Effect of electron cyclotron resonance ion source frequency tuning on ion beam intensity and quality at Department of Physics, University of Jyväskylä.

    Science.gov (United States)

    Toivanen, V; Koivisto, H; Steczkiewicz, O; Celona, L; Tarvainen, O; Ropponen, T; Gammino, S; Mascali, D; Ciavola, G

    2010-02-01

    Ion beam intensity and quality have a crucial effect on the operation efficiency of the accelerator facilities. This paper presents the investigations on the ion beam intensity and quality after the mass separation performed with the Department of Physics, University of Jyväskylä 14 GHz electron cyclotron resonance ion source by sweeping the microwave in the 14.05-14.13 GHz range. In many cases a clear variation in the ion beam intensity and quality as a function of the frequency was observed. The effect of frequency tuning increased with the charge state. In addition, clear changes in the beam structure seen with the beam viewer were observed. The results confirmed that frequency tuning can have a remarkable effect on ion beam intensity and quality especially in the case of highly charged ion beams. The examples presented here represent the typical charge state behavior observed during the measurements. PMID:20192340

  11. Head Start Impact Study

    Data.gov (United States)

    U.S. Department of Health & Human Services — Nationally representative, longitudinal information from an evaluation where children were randomly assigned to Head Start or community services as usual;direct...

  12. Early Head Start Evaluation

    Data.gov (United States)

    U.S. Department of Health & Human Services — Longitudinal information from an evaluation where children were randomly assigned to Early Head Start or community services as usual;direct assessments and...

  13. Nested Head-Tail Vlasov Solver

    CERN Document Server

    Burov, Alexey

    2013-01-01

    Nested Head-Tail (NHT) is a Mathematica-based Vlasov solver for transverse oscillations in multi-bunch beams. It takes into account azimuthal, radial, coupled-bunch and beam-beam degrees of freedom, single- and inter-bunch dipole wakes, an arbitrary damper, beam-beam effects and Landau damping.

  14. Volumetric and dosimetric assessment by cone-beam computed tomography scans in head and neck radiation therapy: a monitoring in four phases of treatment.

    Science.gov (United States)

    Cozzolino, M; Fiorentino, A; Oliviero, C; Pedicini, P; Clemente, S; Califano, G; Caivano, R; Chiumento, C; Fusco, V

    2014-08-01

    Due to the anatomical changes frequently occurring during the course of head and neck (H&N) cancer radiotherapy, the dose distribution, which was actually delivered to the patient, might significantly differ from that planned. The aim of this paper is to investigate these volumetric changes and the resulting dosimetric implications on organs at risk (OARs) and clinical target volumes (CTVs) by cone beam computed tomography (CBCT) scans throughout the treatment. Ten H&N patients, treated by Intensity Modulated Radiotherapy, were analyzed. CTVs and OARs were delineated on four CBCT, acquired at the 10(th), 15(th), 20(th) and 25(th) treatment session, and then compared with the ones at planning CT. The planned beams were applied to each CBCT to recalculate the dose distribution and the corresponding dose volume histograms were compared with those generated on planning CT. To evaluate the HU discrepancies between the conventional CT and CBCT images we used a Catphan(r) 504, observing a maximum discrepancy of about 30 HU. We evaluated the impact of this HU difference in dose calculation and a not clinically relevant error, within 2.8%, was estimated. No inhomogeneity correction was used. The results showed an increased CTV mean dose (Dmean) of about 3% was found, without significant reduction in volume. Due to the parotids' shrinkage (up to 42%), significant dosimetric increases were observed: ipsilateral gland at 15th CBCT (Dmean by 18%; V30 by 31%); controlateral gland at the 10(th) CBCT (Dmean by 12.2%; V30 by 18.7%). For the larynx, a significant increase of volume was found at the 20th (15.7%) and 25th CBCT (13.3%) but it complied with dose constraint. The differences observed for the spinal cord and mandible maximum doses were not clinically relevant. In conclusion, the dosimetric analysis on CBCT can help clinicians to monitor treatment progress and to evaluate whether and when a new plan is necessary. The main benefit of replanning could be to preserve the

  15. Statistical reconstruction for cone-beam CT with a post-artifact-correction noise model: application to high-quality head imaging

    Science.gov (United States)

    Dang, H.; Stayman, J. W.; Sisniega, A.; Xu, J.; Zbijewski, W.; Wang, X.; Foos, D. H.; Aygun, N.; Koliatsos, V. E.; Siewerdsen, J. H.

    2015-08-01

    Non-contrast CT reliably detects fresh blood in the brain and is the current front-line imaging modality for intracranial hemorrhage such as that occurring in acute traumatic brain injury (contrast ~40-80 HU, size  >  1 mm). We are developing flat-panel detector (FPD) cone-beam CT (CBCT) to facilitate such diagnosis in a low-cost, mobile platform suitable for point-of-care deployment. Such a system may offer benefits in the ICU, urgent care/concussion clinic, ambulance, and sports and military theatres. However, current FPD-CBCT systems face significant challenges that confound low-contrast, soft-tissue imaging. Artifact correction can overcome major sources of bias in FPD-CBCT but imparts noise amplification in filtered backprojection (FBP). Model-based reconstruction improves soft-tissue image quality compared to FBP by leveraging a high-fidelity forward model and image regularization. In this work, we develop a novel penalized weighted least-squares (PWLS) image reconstruction method with a noise model that includes accurate modeling of the noise characteristics associated with the two dominant artifact corrections (scatter and beam-hardening) in CBCT and utilizes modified weights to compensate for noise amplification imparted by each correction. Experiments included real data acquired on a FPD-CBCT test-bench and an anthropomorphic head phantom emulating intra-parenchymal hemorrhage. The proposed PWLS method demonstrated superior noise-resolution tradeoffs in comparison to FBP and PWLS with conventional weights (viz. at matched 0.50 mm spatial resolution, CNR = 11.9 compared to CNR = 5.6 and CNR = 9.9, respectively) and substantially reduced image noise especially in challenging regions such as skull base. The results support the hypothesis that with high-fidelity artifact correction and statistical reconstruction using an accurate post-artifact-correction noise model, FPD-CBCT can achieve image quality allowing reliable detection of intracranial

  16. Statistical reconstruction for cone-beam CT with a post-artifact-correction noise model: application to high-quality head imaging

    International Nuclear Information System (INIS)

    Non-contrast CT reliably detects fresh blood in the brain and is the current front-line imaging modality for intracranial hemorrhage such as that occurring in acute traumatic brain injury (contrast ∼40–80 HU, size  >  1 mm). We are developing flat-panel detector (FPD) cone-beam CT (CBCT) to facilitate such diagnosis in a low-cost, mobile platform suitable for point-of-care deployment. Such a system may offer benefits in the ICU, urgent care/concussion clinic, ambulance, and sports and military theatres. However, current FPD-CBCT systems face significant challenges that confound low-contrast, soft-tissue imaging. Artifact correction can overcome major sources of bias in FPD-CBCT but imparts noise amplification in filtered backprojection (FBP). Model-based reconstruction improves soft-tissue image quality compared to FBP by leveraging a high-fidelity forward model and image regularization. In this work, we develop a novel penalized weighted least-squares (PWLS) image reconstruction method with a noise model that includes accurate modeling of the noise characteristics associated with the two dominant artifact corrections (scatter and beam-hardening) in CBCT and utilizes modified weights to compensate for noise amplification imparted by each correction. Experiments included real data acquired on a FPD-CBCT test-bench and an anthropomorphic head phantom emulating intra-parenchymal hemorrhage. The proposed PWLS method demonstrated superior noise-resolution tradeoffs in comparison to FBP and PWLS with conventional weights (viz. at matched 0.50 mm spatial resolution, CNR = 11.9 compared to CNR = 5.6 and CNR = 9.9, respectively) and substantially reduced image noise especially in challenging regions such as skull base. The results support the hypothesis that with high-fidelity artifact correction and statistical reconstruction using an accurate post-artifact-correction noise model, FPD-CBCT can achieve image quality allowing reliable detection of

  17. 军队医院部分护士长对护理部激励措施的态度%Attitudes of Head Nurses to Incentives from Nursing Department in Military Hospital

    Institute of Scientific and Technical Information of China (English)

    王晓妮; 汪际; 戴榕娟

    2011-01-01

    Objective To investigate the attitudes of head nurses to incentives from the nursing department in military hospital. Methods By means of conception sampling,6 head nurses were selected as the subjects of this study. Under the guidance of phenomenological method of qualitative research, the head nurses underwent indepth intervews. Results Through reading, analyzing, rethinking and classifying, 3points were obtained(1) Subjective feeling of head nurses to incentives from the nursing department in military hospital. (2) Influence factors about satisfactions of head nurses to incentives from the nursing department in military hospital. (3) Expectations of head nurses to incentive from the nursing department in military hospital. Conclusion Effective incentive from the nursing department should be established based on continuing assessment to incentive objects.%目的了解军队医院部分护士长对护理部采取的激励措施的态度.方法采用目的抽样的方法选择某军队医院的6名护士长,以质性研究中的现象学方法为指导对其进行深度访谈.结果通过阅读、分析、反思、分类和提炼主题,得出3个主题:(1)护士长对护理部激励的主观感受;(2)影响护士长对护理部激励满意度的因素;(3)护士长对护理部激励的期望.结论护理部的有效激励应建立在对激励对象持续评估的基础上.

  18. Head Start Program: Final Rule. Department of Health and Human Services, Administration for Children and Families, 45 CFR Part 1309 (KIN 0970-AB31).

    Science.gov (United States)

    National Archives and Records Services (GSA), Washington, DC. Office of the Federal Register.

    This section of the "Federal Register" reports authorization of Head Start grantees to use grant funds to purchase facilities in which to operate Head Start programs. This amendment makes 45 CFR Part 1309 one complete rule covering use of grant funds to purchase along with construction and major renovations to Head Start Facilities. The rule…

  19. 13 September 2013 - Chairman of the Board of Directors of the von Karman Institute Kingdom of Belgium J.-P. Contzen visiting the ATLAS experimental cavern with ATLAS Former Spokesperson P. Jenni; visiting the LHC tunnel at Point 1 with Technology Department N. Delruelle and signing the guest book with Technology Department Head F. Bordry. International Relations Adviser T. Kurtyka present.

    CERN Document Server

    Laurent Egli (visit)

    2013-01-01

    13 September 2013 - Chairman of the Board of Directors of the von Karman Institute Kingdom of Belgium J.-P. Contzen visiting the ATLAS experimental cavern with ATLAS Former Spokesperson P. Jenni; visiting the LHC tunnel at Point 1 with Technology Department N. Delruelle and signing the guest book with Technology Department Head F. Bordry. International Relations Adviser T. Kurtyka present.

  20. Volumetric-modulated arc radiotherapy for skull-base and non-skull-base head and neck cancer: a treatment planning comparison with fixed Beam IMRT.

    Science.gov (United States)

    Chen, J; Mok, E; Wang, L; Chen, C; Le, Q-T

    2013-02-01

    The purpose of this study is to compare the dose distribution, monitor units (MUs) and radiation delivery time between volumetric-modulated arc (VMAT) and fix-beam intensity modulated radiotherapy (FB-IMRT) in skull-base and non-skull-base head and neck cancer (HNC). CT datasets of 8 skull-base and 7 non-skull-base HNC were identified. IMRT and VMAT plans were generated. The prescription dose ranged 45-70 Gy (1.8-2.2 Gy/fraction). The VMAT delivery time was measured when these plans were delivered to the patients. The FB-IMRT delivery time was generated on a phantom. Comparison of dose-volume histogram data, MUs, and delivery times was performed using T-test. Our results show that both plans yield similar target volume coverage, homogeneity, and conformity. In skull-base cases, compared to FB-IMRT, VMAT generated significantly smaller hot-spot inside PTV (2.0% vs. 4.5%, p = 0.031), lower maximum chiasm dose (32 ± 11 Gy vs. 41 ± 15 Gy, p = 0.026), lower ipsilateral temporal-mandibular joint dose (D33: 41.4 Gy vs. 46.1 Gy, p = 0.016), lower mean ipsilateral middle ear dose (43 ± 9 Gy vs. 38 ± 10 Gy, p = 0.020) and a trend for lower optic nerve, temporal lobe, parotid, and oral cavity dose. In non-skull-base cases, doses to normal tissues were similar between the two plans. There was a reduction of 70% in MUs (486 ± 95 vs. 1614 ± 493, p VMAT. We conclude that VMAT appears to spare more normal tissues from high radiation dose for the tested skull-base tumors. Dosimetrically, both approaches were equivalent for non-skull-base tumor with VMAT using fewer MUs and shorter delivery time. PMID:22905805

  1. Avaliação da influência da posição dos conectores de cisalhamento no comportamento de vigas mistas parcialmente revestidas Contribution of headed studs to the composite behavior of the partially encased beams

    Directory of Open Access Journals (Sweden)

    Silvana De Nardin

    2008-06-01

    Full Text Available A utilização de conectores de cisalhamento, especialmente os conectores tipo pino com cabeça, é um artifício comum para promover o comportamento misto aço-concreto. O embutimento da viga de aço no pavimento permite reduzir a altura total do pavimento sem comprometer a resistência e a rigidez. Nesse trabalho, são estudadas, experimentalmente, posições alternativas para conectores de cisalhamento tipo pino com cabeça em vigas de aço parcialmente revestidas com concreto. Logo, a principal variável é a posição dos conectores e foram estudadas as posições vertical e horizontal. Verticalmente, os conectores foram soldados na face interna da mesa inferior da viga de aço e, na posição horizontal, os conectores foram soldados nas duas faces opostas da alma. Os resultados mostraram que os conectores contribuem para o comportamento misto e para aumentar a resistência da viga embutida; a posição mais eficiente é soldar os conectores na mesa inferior da viga assimétrica de aço.The use of mechanical shear connectors, mainly headed stud bolts, is the most common way to achieve steel-concrete composite action. The encasement of the steel beam in the depth slab results in increase of strength and stiffness, reducing the total height of the floor. In this investigation, three partially encased composite beams were tested under flexural conditions and the main objective was to investigate some alternative positions for the headed studs. To provide longitudinal shear resistance between the I-shaped beam and the concrete, two positions of the studs were investigated: vertically welded on the bottom flange and horizontally welded on the faces of the web. The experimental results have shown that the headed studs are effective to provide the composite action and increase the bending strength. Furthermore, the headed studs welded vertically on the bottom flange proved to be the most reliable position.

  2. Role Orientation of Department Head in Professional Development in Higher Vocational Colleges%高职院校系主任在专业建设中的角色定位

    Institute of Scientific and Technical Information of China (English)

    陈希球

    2012-01-01

    In higher vocational colleges, management organisations are set up according to majors. The department head usually plays the dual role of management and leadership. It is analysed anddiscussed how the department head should define his role in the process of professional construction.%高等职业院校根据专业大类按系科设置管理机构,系主任在系部工作中通常扮演管理和领导的双重角色。本文就系主任在专业建设过程中的几个方面如何进行自身的角色定位做出了分析和探讨。

  3. 15 February 2012 - Geneva United Nations Office Director-General K.-J. Tokayev in the LHC tunnel with Adviser for Relations with international organisations M. Bona and Technology Department Head F. Bordry.

    CERN Multimedia

    Jean-claude Gadmer

    2012-01-01

    Kassym-Jomart Tokayev, director-general of the United Nations Office at Geneva, (centre picture 02), visited CERN on 15 February. He toured the LHC tunnel with Maurizio Bona, CERN’s adviser to the director-general, relations with international organizations, left, and Frédérick Bordry, CERN’s technology department head. He also visited the ATLAS underground experimental area, as well as the exhibition at the Globe of Science and Innovation.

  4. Comparison between student rating, faculty self-rating and evaluation of faculty members by heads of respective academic departments in the school of medicine in Birjand University of Medical Sciences in Iran

    OpenAIRE

    Taheri, Mohammad Mehdi Hassanzadeh; Ryasi, Hamid Reza; Afshar, Mohammad; Mofatteh, Mohammad Reza

    2014-01-01

    Introduction: University teachers are one of the main pillars of university and the quality of their performance must continuously and systematically be evaluated. This evaluation can be carried out in various ways. The aim of the present study was to survey and to compare the evaluation of faculty members in the medical school in Birjand University of Medical Sciences by three different sources: Student rating, self-assessment, and evaluation by head of related department. Materials and Meth...

  5. A Study of the Relationship between Social Influence of Department Heads and Organizational Commitment of Faculty Members (From the Viewpoint of Faculty Members at Isfahan University of Medial Sciences)

    OpenAIRE

    Vahideh Sayadzadeh; Ali Siadat; Abdolrasoul Jasidian

    2012-01-01

    The purpose of this research is to study the relationship between social influence of department heads (from the viewpoints of faculty members) on organizational commitment of faculty members at Isfahan University of Medical Sciences in the academic year 1387-88. Social influence is composed of 11 items and organizational commitment has 3 items. The Research method is survey, and research population is all faculty members at Isfahan University of Medical Science, whose number is 645. Of this ...

  6. 學科領導在課程改革中的角色:香港個案研究Roles of Department Heads in Curriculum Change: A Hong Kong Case Study

    Directory of Open Access Journals (Sweden)

    譚彩鳳Choi-Fung Tam

    2007-09-01

    Full Text Available 西方研究發現學科組織是學校改進的重要單位,學科領導對推動課程革新、 改善同儕的溝通及協作、重組組織結構等有不少貢獻。本個案研究旨在探索兩位中 文學科領導的角色、風格,並揭示在其領導下學科組織文化的特色。研究發現學科 領導具備多元化的角色,與其職責有密切關係。再者,這兩位領導的風格各有不 同,其中一位具有民主型的領導風格,給同事賦權增能,與他們共享決策權;另一 位卻具有支援性的領導風格,為學科組織成員樹立榜樣。研究揭示學科領導是促進 課程變革的重要人物,其開放態度有利新課程的實施。 Western studies reveal that subject department is an important changing unit for school improvement. Heads of departments contribute significantly to the changes of curriculum, improvement of communication and collaboration among colleagues, and restructuring of organizations. This case study aimed at investigating the roles and leadership styles of two Chinese Language department heads, and the characteristics of the departmental culture under their leadership. The results reported that the roles of department heads were multi-dimensional; which were closely related to their duties. Furthermore, the leadership styles of the two department heads were different. One of them exercised democratic leadership; power and decision-making were shared with her colleagues. While the other tended to perform supportive leadership, she was a role model for her members. The findings concluded that department heads played an important role in curriculum change and their openness facilitated the successful implementation of new curriculum.

  7. Preventing head injuries in children

    Science.gov (United States)

    ... 2012:chap 50B. US Department of Health and Human Services. Centers for Disease Control and Prevention. Heads up. Facts for ... repair - discharge Epilepsy - children - discharge Epilepsy - what to ask your doctor - ...

  8. Weekly monitoring of the effects of conventional external beam radiation therapy on patients with head and neck, chest, and pelvis cancer by means of blood cells count

    International Nuclear Information System (INIS)

    Objective: To evaluate the necessity of weekly monitoring by means of leukocyte and platelet counts of patients with head and neck, chest, and pelvis cancer submitted to conventional radiotherapy. Materials and methods: A hundred and one adult patients with cancer of head and neck (n = 11), chest (n = 35) and pelvis (n = 55), submitted to radiotherapy were assessed by means of leukocyte and platelet counts on a weekly basis, with a comparison between the results before and during the treatment and in correlation with the area treated, patient's sex and age group. Results: The most significant decrease in leukocytes was observed in the fourth week, when lymphocytes, total leukocytes, neutrophils, monocytes and platelets presented a decrease of 53.5%, 26.8%, 19.4%, 22.2% and 14.6%, respectively, in comparison with the values found before the beginning of the therapy. Geometric means for pelvis during the treatment were lower than those for chest, and head and neck. Lymphocytes demonstrated to be more sensitive to radiation therapy. No alteration was found in leukocyte or platelet counts in correlation with patients' sex or age. Conclusion: Based on the results of the present study, weekly leukocyte and platelet counts do not seem to be useful in the assessment patients submitted to conventional radiotherapy for localized cancer. (author)

  9. Weekly monitoring of the effects of conventional external beam radiation therapy on patients with head and neck, chest, and pelvis cancer by means of blood cells count

    Energy Technology Data Exchange (ETDEWEB)

    Lundgren, Maria da Salete Fonseca dos Santos [Hospital Universitario Oswaldo Cruz, Recife, PE (Brazil). Radiotherapy Unit]. E-mail: salete@lundgren.med.br; Cavalcanti, Maria do Socorro de Mendonca [Universidade de Pernambuco, Recife, PE (Brazil); Sampaio, Divaldo de Almeida [Centro de Hematologia de Pernambuco (Hemope), Recife, PE (Brazil)

    2008-01-15

    Objective: To evaluate the necessity of weekly monitoring by means of leukocyte and platelet counts of patients with head and neck, chest, and pelvis cancer submitted to conventional radiotherapy. Materials and methods: A hundred and one adult patients with cancer of head and neck (n = 11), chest (n = 35) and pelvis (n = 55), submitted to radiotherapy were assessed by means of leukocyte and platelet counts on a weekly basis, with a comparison between the results before and during the treatment and in correlation with the area treated, patient's sex and age group. Results: The most significant decrease in leukocytes was observed in the fourth week, when lymphocytes, total leukocytes, neutrophils, monocytes and platelets presented a decrease of 53.5%, 26.8%, 19.4%, 22.2% and 14.6%, respectively, in comparison with the values found before the beginning of the therapy. Geometric means for pelvis during the treatment were lower than those for chest, and head and neck. Lymphocytes demonstrated to be more sensitive to radiation therapy. No alteration was found in leukocyte or platelet counts in correlation with patients' sex or age. Conclusion: Based on the results of the present study, weekly leukocyte and platelet counts do not seem to be useful in the assessment patients submitted to conventional radiotherapy for localized cancer. (author)

  10. Head injury.

    Science.gov (United States)

    Hureibi, K A; McLatchie, G R

    2010-05-01

    Head injury is one of the commonest injuries in sport. Most are mild but some can have serious outcomes. Sports medicine doctors should be able to recognise the clinical features and evaluate athletes with head injury. It is necessary during field assessment to recognise signs and symptoms that help in assessing the severity of injury and making a decision to return-to-play. Prevention of primary head injury should be the aim. This includes protective equipment like helmets and possible rule changes. PMID:20533694

  11. 8 March 2012 - Extraordinary and plenipotentiary Ambassador R. van Schreven, Permanent Representative of the Kingdom of the Netherlands to the United Nations Office and other international organisations at Geneva, signing the guest book with CERN Director-General R. Heuer and Head of International Relations F. Pauss; in the ATLAS experimental area with Deputy Spokesperson Y. Schutz; throughout accompanied by Former Deputy Department Head and Senior Physicist L. Linssen.

    CERN Multimedia

    Maximilien Brice

    2012-01-01

    8 March 2012 - Extraordinary and plenipotentiary Ambassador R. van Schreven, Permanent Representative of the Kingdom of the Netherlands to the United Nations Office and other international organisations at Geneva, signing the guest book with CERN Director-General R. Heuer and Head of International Relations F. Pauss; in the ATLAS experimental area with Deputy Spokesperson Y. Schutz; throughout accompanied by Former Deputy Department Head and Senior Physicist L. Linssen.

  12. Head Injuries

    Science.gov (United States)

    ... Aid: Falls First Aid: Head Injuries Preventing Children's Sports Injuries Getting Help: Know the Numbers Concussions Stay Safe: ... Tips: Inline Skating Safety Tips: Skateboarding Dealing With Sports Injuries Concussions: What to Do Contact Us Print Resources ...

  13. Head Tilt

    Science.gov (United States)

    ... node infection, or, very uncommonly, a brain tumor. Congenital Muscular Torticollis By far the most common cause of head ... also may be ordered, as some children with congenital muscular torticollis also have an abnormality known as developmental dysplasia ...

  14. Head MRI

    Science.gov (United States)

    ... the brain ( arteriovenous malformations of the head ) Acoustic neuroma Bleeding in the brain Brain abscess Brain aneurysms ... 2014:chap 5. Read More Absence seizure Acoustic neuroma Alzheimer disease Amyotrophic lateral sclerosis Aneurysm in the ...

  15. Spot-scanning beam proton therapy vs intensity-modulated radiation therapy for ipsilateral head and neck malignancies: A treatment planning comparison

    International Nuclear Information System (INIS)

    Radiation therapy for head and neck malignancies can have side effects that impede quality of life. Theoretically, proton therapy can reduce treatment-related morbidity by minimizing the dose to critical normal tissues. We evaluated the feasibility of spot-scanning proton therapy for head and neck malignancies and compared dosimetry between those plans and intensity-modulated radiation therapy (IMRT) plans. Plans from 5 patients who had undergone IMRT for primary tumors of the head and neck were used for planning proton therapy. Both sets of plans were prepared using computed tomography (CT) scans with the goals of achieving 100% of the prescribed dose to the clinical target volume (CTV) and 95% to the planning TV (PTV) while maximizing conformity to the PTV. Dose-volume histograms were generated and compared, as were conformity indexes (CIs) to the PTVs and mean doses to the organs at risk (OARs). Both modalities in all cases achieved 100% of the dose to the CTV and 95% to the PTV. Mean PTV CIs were comparable (0.371 IMRT, 0.374 protons, p = 0.953). Mean doses were significantly lower in the proton plans to the contralateral submandibular (638.7 cGy IMRT, 4.3 cGy protons, p = 0.002) and parotid (533.3 cGy IMRT, 48.5 cGy protons, p = 0.003) glands; oral cavity (1760.4 cGy IMRT, 458.9 cGy protons, p = 0.003); spinal cord (2112.4 cGy IMRT, 249.2 cGy protons, p = 0.002); and brainstem (1553.52 cGy IMRT, 166.2 cGy protons, p = 0.005). Proton plans also produced lower maximum doses to the spinal cord (3692.1 cGy IMRT, 2014.8 cGy protons, p = 0.034) and brainstem (3412.1 cGy IMRT, 1387.6 cGy protons, p = 0.005). Normal tissue V10, V30, and V50 values were also significantly lower in the proton plans. We conclude that spot-scanning proton therapy can significantly reduce the integral dose to head and neck critical structures. Prospective studies are underway to determine if this reduced dose translates to improved quality of life

  16. Beam path toxicity in candidate organs-at-risk: Assessment of radiation emetogenesis for patients receiving head and neck intensity modulated radiotherapy

    International Nuclear Information System (INIS)

    Background: To investigate potential dose–response relationship between radiation-associated nausea and vomiting (RANV) reported during radiotherapy and candidate nausea/vomiting-associated regions of interest (CNV-ROIs) in head and neck (HNC) squamous cell carcinomas. Methods and material: A total of 130 patients treated with IMRT with squamous cell carcinomas of head and neck were evaluated. For each patient, CNV-ROIs were segmented manually on planning CT images. Clinical on-treatment RANV data were reconstructed by a review of the records for all patients. Dosimetric data parameters were recorded from dose–volume histograms. Nausea and vomiting reports were concatenated as a single binary “Any N/V” variable, and as a “CTC-V2+” variable. Results: The mean dose to CNV-ROIs was higher for patients experiencing RANV events. For patients receiving IMRT alone, a dose–response effect was observed with varying degrees of magnitude, at a statistically significant level for the area postrema, brainstem, dorsal vagal complex, medulla oblongata, solitary nucleus, oropharyngeal mucosa and whole brain CNV-ROIs. Conclusion: RANV is a common therapy-related morbidity facing patients receiving HNC radiotherapy, and, for those receiving radiotherapy-alone, is associated with modifiable dose to specific CNS structures

  17. 3 October 2013 - Ukrainian Vice Prime Minister Ukraine K. I. Gryschenko welcomed by CERN Director-General R. Heuer who introduces Head of International Relations R. Voss; Head of Technology Department F. Bordry; Deputy Head of International Relations E. Tsesmelis; Deputy Legal Counsel M. Wilbers; Adviser for Ukraine T. Kurtyka; Signing of the Agreement between Ukraine and CERN concerning the granting of the status of Associate Member at CERN; in the LHC tunnel at Point 5 and visiting CMS experimental area with CERN Team Leader A. Petrilli.

    CERN Multimedia

    Anna Pantelia

    2013-01-01

    3 October 2013 - Ukrainian Vice Prime Minister Ukraine K. I. Gryschenko welcomed by CERN Director-General R. Heuer who introduces Head of International Relations R. Voss; Head of Technology Department F. Bordry; Deputy Head of International Relations E. Tsesmelis; Deputy Legal Counsel M. Wilbers; Adviser for Ukraine T. Kurtyka; Signing of the Agreement between Ukraine and CERN concerning the granting of the status of Associate Member at CERN; in the LHC tunnel at Point 5 and visiting CMS experimental area with CERN Team Leader A. Petrilli.

  18. Electro-optic voltage sensor head

    Science.gov (United States)

    Crawford, Thomas M.; Davidson, James R.; Woods, Gregory K.

    1999-01-01

    The invention is an electro-optic voltage sensor head designed for integration with existing types of high voltage transmission and distribution apparatus. The sensor head contains a transducer, which comprises a transducing material in which the Pockels electro-optic effect is observed. In the practice of the invention at least one beam of electromagnetic radiation is routed into the transducing material of the transducer in the sensor head. The beam undergoes an electro-optic effect in the sensor head when the transducing material is subjected to an E-field. The electro-optic effect is observed as a differential phase a shift, also called differential phase modulation, of the beam components in orthogonal planes of the electromagnetic radiation. In the preferred embodiment the beam is routed through the transducer along an initial axis and then reflected by a retro-reflector back substantially parallel to the initial axis, making a double pass through the transducer for increased measurement sensitivity. The preferred embodiment of the sensor head also includes a polarization state rotator and at least one beam splitter for orienting the beam along major and minor axes and for splitting the beam components into two signals which are independent converse amplitude-modulated signals carrying E-field magnitude and hence voltage information from the sensor head by way of optic fibers.

  19. Final report to US Department of Energy: Cyclotron autoresonance accelerator for electron beam dry scrubbing of flue gases

    Energy Technology Data Exchange (ETDEWEB)

    Hirshfield, J.L.

    2001-05-25

    Several designs have been built and operated of microwave cyclotron autoresonance accelerators (CARA's) with electron beam parameters suitable for remediation of pollutants in flue gas emissions from coal-burning power plants. CARA designs have also been developed with a TW-level 10.6 micron laser driver for electron acceleration from 50 to 100 MeV, and with UHF drivers for proton acceleration to over 500 MeV. Dose requirements for reducing SO2, NOx, and particulates in flue gas emissions to acceptable levels have been surveyed, and used to optimize the design of an electron beam source to deliver this dose.

  20. 2 March 2011 - Swedish State Secretary to the Minister for Enterprise and Energy C. Håkansson Boman signing the guest book wit Head of International Relations F. Pauss; in the LHC superconducting magnet test hall with Technology Department Head F. Bordry; in the ATLAS visitor centre with P. Grafstrom; troughout accompanied by Deparment Head T. Pettersson.

    CERN Multimedia

    Jean-Claude Gadmer

    2011-01-01

    She was welcomed to CERN by Felicitas Pauss, head of international relations. The visit included a presentation about the LHC Computing Grid project and a tour of the LHC superconducting magnet test hall and the ATLAS visitor centre.

  1. Head Lice

    Science.gov (United States)

    ... resources Meet our partners Español Donate Diseases and treatments Acne and rosacea Bumps and growths Color problems Contagious skin diseases ... Head lice public SPOT Skin Cancer™ Diseases and treatments Acne and rosacea Bumps and growths Color problems Contagious skin diseases ...

  2. An anatomy-based beam segmentation tool for intensity-modulated radiation therapy and its application to head-and-neck cancer

    International Nuclear Information System (INIS)

    Purpose: In segmental intensity-modulated radiation therapy (IMRT), the beam fluences result from superposition of unmodulated beamlets (segments). In the inverse planning approach, segments are a result of 'clipping' intensity maps. At Ghent University Hospital, segments are created by an anatomy-based segmentation tool (ABST). The objective of this report is to describe ABST. Methods and Materials: For each beam direction, ABST generates segments by a multistep procedure. During the initial steps, beam's eye view (BEV) projections of the planning target volumes (PTVs) and organs at risk (OARs) are generated. These projections are used to make a segmentation grid with negative values across the expanded OAR projections and positive values elsewhere inside the expanded PTV projections. Outside these regions, grid values are set to zero. Subsequent steps transform the positive values of the segmentation grid to increase with decreasing distance to the OAR projections and to increase with longer pathlengths measured along rays from their entrance point through the skin contours to their respective grid point. The final steps involve selection of iso-value lines of the segmentation grid as segment outlines which are transformed to leaf and jaw positions of a multileaf collimator (MLC). Segment shape approximations, if imposed by MLC constraints, are done in a way that minimizes overlap between the expanded OAR projections and the segment aperture. Results: The ABST procedure takes about 3 s/segment on a Compaq Alpha XP900 workstation. In IMRT planning problems with little complexity, such as laryngeal (example shown) or thyroid cancer, plans that are in accordance with the clinical protocol can be generated by weighting the segments generated by ABST without further optimization of their shapes. For complex IMRT plans such as paranasal sinus cancer (not shown), ABST generates a start assembly of segments from which the shapes and weights are further optimized

  3. Uncertainties and CTV to PTV margins quantitative assessment using cone-beam CT technique in clinical application for prostate, and head and neck irradiation tumours.

    Science.gov (United States)

    Juan-Senabre, X J; López-Tarjuelo, J; Conde-Moreno, A; Santos-Serra, A; Sánchez-Iglesias, A L; Quirós-Higueras, J D; de Marco Blancas, N; Calzada-Feliu, S; Ferrer-Albiach, C

    2011-11-01

    PURPOSE To evaluate the magnitude of systematic and random errors from a subset of 100 prostate and 26 head and neck (H&N) cancer patients treated with conventional conformal radiotherapy and using image-guided radiotherapy (IGRT). After treatment, the uncertainties involved and the CTV to PTV margin were evaluated. MATERIAL AND METHODS An Elekta Synergy® linear accelerator was used, taking advantage of 3D on-board computed tomography. IGRT with no-action level (NAL) protocol was applied, reporting the 3D translation and rotation corrections. A statistical study was performed to analyse systematic, random and interobserver uncertainties, and, finally, to obtain the CTV to PTV margins. RESULTS The H&N patients' uncertainties found were smaller than those of prostate patients. The CTV to PTV margins assessed, following the guidelines found in the literature, in the three dimensions of space (right-left, superior-inferior, anterior-posterior) were (5.3, 3.5, 3.2) mm for H&N and (7.3, 7.0, 9.0) mm for prostate cancer treatments. CONCLUSIONS It was found that assessing all the involved uncertainties within radiation treatments was very revealing; their quality improves using IGRT techniques and performing extensive data analysis. PMID:22082648

  4. Beam-Beam Effects

    OpenAIRE

    Herr, W; Pieloni, T.

    2016-01-01

    One of the most severe limitations in high-intensity particle colliders is the beam-beam interaction, i.e. the perturbation of the beams as they cross the opposing beams. This introduction to beam-beam effects concentrates on a description of the phenomena that are present in modern colliding beam facilities.

  5. Beam-Beam Effects

    CERN Document Server

    Herr, W

    2014-01-01

    One of the most severe limitations in high-intensity particle colliders is the beam-beam interaction, i.e. the perturbation of the beams as they cross the opposing beams. This introduction to beam-beam effects concentrates on a description of the phenomena that are present in modern colliding beam facilities.

  6. Applications of electron lenses: scraping of high-power beams, beam-beam compensation, and nonlinear optics

    OpenAIRE

    Stancari, Giulio

    2014-01-01

    Electron lenses are pulsed, magnetically confined electron beams whose current-density profile is shaped to obtain the desired effect on the circulating beam. Electron lenses were used in the Fermilab Tevatron collider for bunch-by-bunch compensation of long-range beam-beam tune shifts, for removal of uncaptured particles in the abort gap, for preliminary experiments on head-on beam-beam compensation, and for the demonstration of halo scraping with hollow electron beams. Electron lenses for b...

  7. Laser working head in a tube

    International Nuclear Information System (INIS)

    A laser working head is claimed for operating inside a tube of the type that is delimited by a tubular wall incorporating a window for the passage of the laser beam across which the laser beam strikes a working zone situated opposite the window. The tubular wall incorporates a localized zone, surrounding the window, of reduced thickness

  8. Electron beam modeling on LTX

    Science.gov (United States)

    Szalkowski, Gregory; Majeski, Richard; Schmitt, John

    2014-10-01

    The lithium tokamak experiment (LTX) is a low aspect ratio tokamak with a steel clad copper shell that can be heated to 300-400 °C and coated with lithium. The lithium coating has been shown to decrease impurities in the plasma and decrease the recycling coefficient, improving plasma performance. The coating is applied to the walls by heating the shells, then using an electron beam to evaporate a pool of lithium located at the bottom of the shell. The beam is steered using the magnetic field generated by the field coils. This method allows for rapid evaporation of the lithium, producing a 50-100 nm coating in approximately 5 minutes. The current electron beam system can only coat half of the shell surface. A new electron beam system has been installed on LTX to coat the remaining shell surface. A model of this electron gun has been created using the AMaze program series (Field Precision LCC). The model will be used to find the magnetic fields needed to steer the electron beam produced by the gun to the lithium pool. The model will also show the electropotential produced both at the electron gun head and in the vessel. The model may also be used to find the dispersion of the beam and therefore the effective power density of the beam as it impacts the lithium pool. Supported by US DOE Contracts DE-AC02-09CH11466 and DE-AC52-07NA27344 and in part by the U.S. Department of Energy, Office of Science, Office of Workforce Development for Teachers and Scientists (WDTS) under the Science Undergraduate Laboratory Internship.

  9. Utility of Megavoltage Fan-Beam CT for Treatment Planning in a Head-And-Neck Cancer Patient with Extensive Dental Fillings Undergoing Helical Tomotherapy

    International Nuclear Information System (INIS)

    The purpose of this study was to demonstrate the potential utility of megavoltage fan-beam computed tomography (MV-FBCT) for treatment planning in a patient undergoing helical tomotherapy for nasopharyngeal carcinoma in the presence of extensive dental artifact. A 28-year-old female with locally advanced nasopharyngeal carcinoma presented for radiation therapy. Due to the extensiveness of the dental artifact present in the oral cavity kV-CT scan acquired at simulation, which made treatment planning impossible on tomotherapy planning system, MV-FBCT imaging was obtained using the HI-ART tomotherapy treatment machine, with the patient in the treatment position, and this information was registered with her original kV-CT scan for the purposes of structure delineation, dose calculation, and treatment planning. To validate the feasibility of the MV-FBCT-generated treatment plan, an electron density CT phantom (model 465, Gammex Inc., Middleton, WI) was scanned using MV-FBCT to obtain CT number to density table. Additionally, both a 'cheese' phantom (which came with the tomotherapy treatment machine) with 2 inserted ion chambers and a generic phantom called Quasar phantom (Modus Medical Devices Inc., London, ON, Canada) with one inserted chamber were used to confirm dosimetric accuracy. The MV-FBCT could be used to clearly visualize anatomy in the region of the dental artifact and provide sufficient soft-tissue contrast to assist in the delineation of normal tissue structures and fat planes. With the elimination of the dental artifact, the MV-FBCT images allowed more accurate dose calculation by the tomotherapy system. It was confirmed that the phantom material density was determined correctly by the tomotherapy MV-FBCT number to density table. The ion chamber measurements agreed with the calculations from the MV-FBCT generated phantom plan within 2%. MV-FBCT may be useful in radiation treatment planning for nasopharyngeal cancer patients in the setting of extensive

  10. Is HEADS in our heads?

    DEFF Research Database (Denmark)

    Boisen, Kirsten A; Hertz, Pernille Grarup; Blix, Charlotte;

    2016-01-01

    BACKGROUND: Outpatient clinic visits are a window of opportunity to address health risk behaviors and promote a healthier lifestyle among young people. The HEADS (Home, Education, Eating, Activities, Drugs [i.e. substance use including tobacco, alcohol, and illegal drugs], Sexuality [including...... contraception], Safety, Self-harm) interview is a feasible way of exploring health risk behaviors and resilience. OBJECTIVE: The purpose of this study was to evaluate how often HEADS topics were addressed according to young patients and staff in pediatric and adult outpatient clinics. METHODS: We conducted...... a questionnaire survey among young patients and health care professionals at a tertiary university hospital. Young patients reported on their cumulative experience and staff reported on their usual practice. RESULTS: A total of 290 young patients aged 12-22 years (78% having a chronic condition) and 97 health...

  11. Daily kV cone-beam CT and deformable image registration as a method for studying dosimetric consequences of anatomic changes in adaptive IMRT of head and neck cancer

    International Nuclear Information System (INIS)

    Purpose. Evaluating a method for anatomic changes assessment and actually delivered doses during head and neck (HandN) cancer radiotherapy (RT) utilizing volumetric images from cone-beam CT (CBCT) and a commercially available deformable image registration (DIR) software. Material and methods. Thirty-three daily acquired CBCT image sets and the planning CT of one HandN cancer patient were retrospectively transferred from a standard treatment planning system (TPS) to the DIR software. The planning CT was deformed to each CBCT and the contours delineated for planning purposes were propagated. Transfer of each deformed planning CT back into the TPS enabled re-calculation of the actual daily delivered dose distribution based on online image-guidance. For both normal tissues and target volumes the deformed contours were visually evaluated and dose-volume histogram (DVH) parameters were calculated. Results. The workflow of the method took 45 minutes to estimate delivered dose for each treatment fraction. Propagated deformed contours were acceptable for evaluating changes in anatomy. Based on daily DVH parameters the actual delivered dose could be monitored. Conclusion. A proof-of-principle method to quantitatively monitor anatomical changes and delivered dose during the course of fractionated RT for HandN cancer has been demonstrated. This provides a tool for exploring adaptive re-planning strategies.

  12. Seafloor character--Offshore of Bodega Head, California

    Data.gov (United States)

    U.S. Geological Survey, Department of the Interior — This part of DS 781 presents the seafloor-character map Offshore of Bodega Head, California (raster data file is included in "SeafloorCharacter_BodegaHead.zip,"...

  13. 29 March 2011 - Ninth President of Israel S.Peres welcomed by CERN Director-General R. Heuer who introduces Council President M. Spiro, Director for Accelerators and Technology S. Myers, Head of International Relations F. Pauss, Physics Department Head P. Bloch, Technology Department Head F. Bordry, Human Resources Department Head A.-S. Catherin, Beams Department Head P. Collier, Information Technology Department Head F. Hemmer, Adviser for Israel J. Ellis, Legal Counsel E. Gröniger-Voss, ATLAS Collaboration Spokesperson F. Gianotti, Former ATLAS Collaboration Spokesperson P. Jenni, Weizmann Institute G. Mikenberg, CERN VIP and Protocol Officer W. Korda.

    CERN Multimedia

    Maximilien Brice

    2011-01-01

    During his visit he toured the ATLAS underground experimental area with Giora Mikenberg of the ATLAS collaboration, Weizmann Institute of Sciences and Israeli industrial liaison office, Rolf Heuer, CERN’s director-general, and Fabiola Gianotti, ATLAS spokesperson. The president also visited the CERN computing centre and met Israeli scientists working at CERN.

  14. 5 February 2010: Romanian Former Minister of Justice V. Stoica (4th from left) visiting SM18 with, from left to right, University of Bucharest Faculty of Physics A. Costescu, DESY Hamburg C. Diaconu; Mrs Valeriu Stoica; Université de Montpellier II S. Ciulli; Technology Department Vacuum, Surfaces and Coatings group S. Ilie; Technology Department Head F. Bordry and Adviser for Russian Federation, Central and Eastern Europe T. Kurtyka.

    CERN Multimedia

    Maximilien Brice

    2010-01-01

    5 February 2010: Romanian Former Minister of Justice V. Stoica (4th from left) visiting SM18 with, from left to right, University of Bucharest Faculty of Physics A. Costescu, DESY Hamburg C. Diaconu; Mrs Valeriu Stoica; Université de Montpellier II S. Ciulli; Technology Department Vacuum, Surfaces and Coatings group S. Ilie; Technology Department Head F. Bordry and Adviser for Russian Federation, Central and Eastern Europe T. Kurtyka.

  15. Beam Instrumentation and Diagnostics

    CERN Document Server

    Strehl, Peter

    2006-01-01

    This treatise covers all aspects of the design and the daily operations of a beam diagnostic system for a large particle accelerator. A very interdisciplinary field, it involves contributions from physicists, electrical and mechanical engineers and computer experts alike so as to satisfy the ever-increasing demands for beam parameter variability for a vast range of operation modi and particles. The author draws upon 40 years of research and work, most of them spent as the head of the beam diagnostics group at GSI. He has illustrated the more theoretical aspects with many real-life examples that will provide beam instrumentation designers with ideas and tools for their work.

  16. Head Start Program Information Report (HSPIR)

    Data.gov (United States)

    U.S. Department of Health & Human Services — Information about children enrolled in the Head Start program and information about their families. Data about the children include: age, type of program attended,...

  17. Contours-Offshore of Bodega Head, California

    Data.gov (United States)

    U.S. Geological Survey, Department of the Interior — This part of DS 781 presents data for the bathymetric contours for several seafloor maps of the Offshore of Bodega Head map area, California. The vector data file...

  18. Bathymetry--Offshore of Bodega Head, California

    Data.gov (United States)

    U.S. Geological Survey, Department of the Interior — This part of DS 781 presents data for the bathymetry and shaded-relief maps of the Offshore of Bodega Head map area, California. Raster data file is included in...

  19. On board imaging with cone beam C.B.C.T. kV VARIANTM: Montauban's radiation therapy department experience

    International Nuclear Information System (INIS)

    Purpose: To describe our practice day to day with a Variant linac 'Clinac 2100' fully equipped with an On Board Imager (O.B.I.) for patients with prostate cancer. Materials and methods: A volumetric and dosimetric study was performed in 2006 using Artiview software (Aquilab) for nine patients and 76 Cone Beam CT kV (C.B.C.T. kV). We have contoured targets and organs at risk from C.B.C.T. kV slides acquisitions. Second, we achieved a dose-volume histogram (D.V.H.) study for a patient treated in 2007 with I.M.R.T. technique in comparison with the 2006 study. Results: 2006 analysis: The study showed a very important variability of organ measurements. Seminal vesicles were strongly influenced by adjacent organs; observed differences for prostate could be explained by contouring uncertainty on the apex. Inter-sessions motions could be observed for bladder, rectum and seminal vesicles (S.V.). Part of prostate volume not encompassed by P.T.V. is about 2.5%; V.S. volume outside P.T.V. is about 35%. Tumoral conformation index (T.C.I.) is inferior to 97.5% in 22% of all cases. Anteroposterior displacements of the prostate barycentre is superior to 5 mm. From this analysis, we recommended the strict respect of hygieno-dietetic rules, and we have adapted the system settings for better immobilization, which were applied for the 2007 study. For the 2007 analysis, since April 2007, most of patients are treated with I.M.R.T. for prostate cancer, at the second part of the radiation therapy to encompass only the prostate volume. Dose-volume histograms showed a great spreading out for 2006 patients, and not for the 2007 patient. Conclusions: Intensity modulation radiotherapy (I.M.R.T.) and image guided radiotherapy (I.G.R.T.) should permit a margin reduction for P.T.V.. Strict respect of hygieno-dietetics rules is necessary to avoid rectal distension and local recurrence. (authors)

  20. MD 402: Head-on limits. Separation leveling.

    CERN Document Server

    Barranco Garcia, Javier; Pieloni, Tatiana; Tambasco, Claudia; Crouch, Matthew; Salvachua Ferrando, Belen Maria; Pojer, Mirko; Trad, Georges; Solfaroli Camillocci, Matteo; Jacquet, Delphine; Fuchsberger, Kajetan; Giachino, Rossano; CERN. Geneva. ATS Department

    2016-01-01

    HL-LHC will rely on very large beam-beam head-on shift and spread. Also LHC to push for higher luminosity will go in the same direction. A clear understanding of colling high brightness beams is fundamental to guarantee the operation of such beams and to anticipate problematics linked to such configuration. We want to explore the beam dynamics of colliding beams with high brightness: intensities as high as possible close to 2e11 ppb or higher and small emittances. The goal is to monitor the beam lifetimes and emittance behavior around the machine working point for full head-on collision and for collisions with small transverse offsets. The study aims to highlight emittance growth driven by beam-beam and possible issues with instabilities due to mode coupling at injection energy.

  1. Computed Tomography (CT) -- Head

    Medline Plus

    Full Text Available ... CT scanning provides more detailed information on head injuries, stroke , brain tumors and other brain diseases than ... head is typically used to detect: bleeding, brain injury and skull fractures in patients with head injuries. ...

  2. Computed Tomography (CT) -- Head

    Medline Plus

    Full Text Available ... News Physician Resources Professions Site Index A-Z Computed Tomography (CT) - Head What is CT Scanning of the ... Head? What is CT Scanning of the Head? Computed tomography, more commonly known as a CT or CAT ...

  3. Head Lice (Pediculosis Capitis)

    Science.gov (United States)

    ... rash and rashes clinical tools newsletter | contact Share | Head Lice (Pediculosis Capitis) A parent's guide to condition and treatment ... hair shaft are seen in this person with head lice. Overview Head lice (pediculosis capitis) is a common, ...

  4. Computed Tomography (CT) -- Head

    Science.gov (United States)

    ... Physician Resources Professions Site Index A-Z Computed Tomography (CT) - Head Computed tomography (CT) of the head uses special x-ray ... What is CT Scanning of the Head? Computed tomography, more commonly known as a CT or CAT ...

  5. Head Trauma, First Aid

    Science.gov (United States)

    ... rashes clinical tools newsletter | contact Share | Head Trauma, First Aid A A A Head trauma signs and symptoms ... to take care for potential neck/spinal injury. First Aid Guide If you suspect either a serious head ...

  6. Non-invasive head fixation for external irradiation of tumors of the head and neck

    International Nuclear Information System (INIS)

    Purpose: To fully utilize the technical capabilities of radiation diagnostics and planning, a precise and reproducible method of head fixation is a prerequisite. Method: We have adapted the Vogele-Bale-Hohner (VBH) head holder (Wellhoefer Dosimetrie, Schwarzenbruck, Germany), originally designed for frameless stereotactic operations, to the requirements of external beam radiotherapy. A precise and reproducible head fixation is attained by an individualized vacuum upper-dental cast which is connected over 2 hydraulic arms to an adjustable head- and rigid base-plate. Radiation field and patient alignment lasers are marked on a relocatable clear PVC localization box. Results: The possibility of craniocaudal adjustment of the head plate on the base plate allows the system to adapt to the actucal position of the patient on the raditherapy couch granting tensionless repositioning. The VBH head holder has proven itself to be a precise yet practicable method of head fixation. Duration of mouthpiece production and daily repositioning is comparable to that of the thermoplastic mask. Conclusion: The new head holder is in routine use at our hospital and quite suitable for external beam radiation of patients with tumors of the head and neck. (orig.)

  7. Head Start Family and Child Experiences Survey (FACES) 1997 Cohort

    Data.gov (United States)

    U.S. Department of Health & Human Services — Descriptive, longitudinal study including direct assessments, classroom observation, parent and teacher interviews, for a nationally represenative sample of Head...

  8. Head Start Family and Child Experiences Survey (FACES) 2003 Cohort

    Data.gov (United States)

    U.S. Department of Health & Human Services — Descriptive, longitudinal study including direct assessments, classroom observation, parent and teacher interviews, for a nationally represenative sample of Head...

  9. Head Start Family and Child Experiences Survey (FACES) 2000 Cohort

    Data.gov (United States)

    U.S. Department of Health & Human Services — Descriptive, longitudinal study including direct assessments, classroom observation, parent and teacher interviews, for a nationally represenative sample of Head...

  10. Head Start Family and Child Experiences Survey (FACES) 2006 Cohort

    Data.gov (United States)

    U.S. Department of Health & Human Services — Descriptive, longitudinal study including direct assessments, classroom observation, parent and teacher interviews, for a nationally represenative sample of Head...

  11. Head Impact Laboratory (HIL)

    Data.gov (United States)

    Federal Laboratory Consortium — The HIL uses testing devices to evaluate vehicle interior energy attenuating (EA) technologies for mitigating head injuries resulting from head impacts during mine/...

  12. BE Department Annual Report 2011

    CERN Document Server

    Billen, R; Collier, P; Garoby, R; Hatziangeli, E; Jensen, E; Jones, R; Lamont, M; Mackney, A

    2012-01-01

    The Beams Department hosts the Groups responsible for the beam generation, acceleration, diagnostics, controls and performance optimization for the whole CERN accelerator complex. This Report describes the 2011 highlights for the BE Department.

  13. BE Department Annual Report 2012

    CERN Document Server

    Billen, R; Collier, P; Garoby, R; Hatziangeli, E; Jensen, E; Jones, R; Lamont, M; Mackney, A

    2013-01-01

    The Beams Department hosts the Groups responsible for the beam generation, acceleration, diagnostics, controls and performance optimization for the whole CERN accelerator complex. This Report describes the 2012 highlights for the BE Department.

  14. BE Department Annual Report 2013

    CERN Document Server

    Arduini, G; Brüning, O; Collier, P; Garoby, R; Hatziangeli, E; Jensen, E; Jones, R; Lamont, M; Mackney, A

    2014-01-01

    The Beams Department hosts the Groups responsible for the beam generation, acceleration, diagnostics, controls and performance optimization for the whole CERN accelerator complex. This Report describes the 2013 highlights for the BE Department.

  15. 27 June 2012 - Ambassador K. Pierce, Permanent Representative of the United Kingdom of Great Britain and Northern Ireland to the United Nations Office and other international organisations in Geneva visiting the LHC tunnel at Point 5 with Department Head P. Collier and CMS control room with Former Collaboration Spokesperson J. Virdee.

    CERN Multimedia

    Laurent Egli

    2012-01-01

    27 June 2012 - Ambassador K. Pierce, Permanent Representative of the United Kingdom of Great Britain and Northern Ireland to the United Nations Office and other international organisations in Geneva visiting the LHC tunnel at Point 5 with Department Head P. Collier and CMS control room with Former Collaboration Spokesperson J. Virdee.

  16. 17 October 2013 - C. Ashton High Representative of the European Union for Foreign Affairs and Security Policy, Vice-President of the European Commission visiting the ATLAS cavern with ATLAS Collaboration Spokesperson D. Charlton; visiting the LHC tunnel at Point 1 with Technology Department Head F. Bordry and signing the Guest book with CERN Director-General R. Heuer.

    CERN Multimedia

    Maximilien Brice

    2013-01-01

    17 October 2013 - C. Ashton High Representative of the European Union for Foreign Affairs and Security Policy, Vice-President of the European Commission visiting the ATLAS cavern with ATLAS Collaboration Spokesperson D. Charlton; visiting the LHC tunnel at Point 1 with Technology Department Head F. Bordry and signing the Guest book with CERN Director-General R. Heuer.

  17. 11th February 2011 - Member of the Parliament for Glasgow North and Shadow Secretary of State for Scotland A. McKechin MP signing the geust book with Adviser J. Ellis, University of Glasgow Principal A. Muscatelli and Engineering Department Head R. Saban.

    CERN Multimedia

    Jean-Claude Gadmer

    2011-01-01

    11th February 2011 - Member of the Parliament for Glasgow North and Shadow Secretary of State for Scotland A. McKechin MP signing the geust book with Adviser J. Ellis, University of Glasgow Principal A. Muscatelli and Engineering Department Head R. Saban.

  18. 26th August 2010 - World Meteorological Organization Secretary-General M. Jarraud signing the guest book with CERN Director-General R. Heuer and visiting the LHC superconducting magnet test hall with Technology Department Head F. Bordry; throughout accompanied by M. Bona, CERN Relations with International Organisations

    CERN Multimedia

    Maximilien Brice

    2010-01-01

    26th August 2010 - World Meteorological Organization Secretary-General M. Jarraud signing the guest book with CERN Director-General R. Heuer and visiting the LHC superconducting magnet test hall with Technology Department Head F. Bordry; throughout accompanied by M. Bona, CERN Relations with International Organisations

  19. 12 December 2013 - Sir Konstantin Novoselov, Nobel Prize in Physics 2010, signing the guest book with International Relations Adviser E. Tsesmelis; visiting the ATLAS experimental cavern with Spokesperson D. Charlton; in the LHC tunnel with Technology Department Head F. Bordry. I. Antoniadis, CERN Theory Group Leader, accompanies throughout.

    CERN Multimedia

    Anna Pantelia

    2013-01-01

    12 December 2013 - Sir Konstantin Novoselov, Nobel Prize in Physics 2010, signing the guest book with International Relations Adviser E. Tsesmelis; visiting the ATLAS experimental cavern with Spokesperson D. Charlton; in the LHC tunnel with Technology Department Head F. Bordry. I. Antoniadis, CERN Theory Group Leader, accompanies throughout.

  20. 2 March 2012 - US Google Management Team Executive Chairman E. Schmidt visiting the LHC superconducting magnet test hall with Director for Accelerators and Technology S. Myers and Head of Technology Department F. Bordry; signing the guest book with CERN Director-General R. Heuer.

    CERN Multimedia

    Maximilien Brice

    2012-01-01

    2 March 2012 - US Google Management Team Executive Chairman E. Schmidt visiting the LHC superconducting magnet test hall with Director for Accelerators and Technology S. Myers and Head of Technology Department F. Bordry; signing the guest book with CERN Director-General R. Heuer.

  1. Chairman of the DELL Board of Directors and Chief Executive Officer Michael S. Dell with CERN Director-General R. Heuer and in front of the ATLAS detector (centre) with ATLAS Deputy Spokesperson A. Lankford (left) and Information Technology Department Head F. Hemmer on 26th January 2010.

    CERN Multimedia

    Maximilien Brice

    2010-01-01

    Chairman of the DELL Board of Directors and Chief Executive Officer Michael S. Dell with CERN Director-General R. Heuer and in front of the ATLAS detector (centre) with ATLAS Deputy Spokesperson A. Lankford (left) and Information Technology Department Head F. Hemmer on 26th January 2010.

  2. 20th May 2010 - Malaysian Minister for Science, Technology and Innovation H. F: B. H. Yusof signing the guest book with Coordinator for External Relations F. Pauss and CMS Collaboration Deputy Spokesperson A. De Roeck; visiting the LHC superconducting magnet test hall with Technology Department Head F. Bordry; throughout accompanied by CERN Advisers J. Ellis and E. Tsesmelis.

    CERN Document Server

    Maximilien brice

    2010-01-01

    20th May 2010 - Malaysian Minister for Science, Technology and Innovation H. F: B. H. Yusof signing the guest book with Coordinator for External Relations F. Pauss and CMS Collaboration Deputy Spokesperson A. De Roeck; visiting the LHC superconducting magnet test hall with Technology Department Head F. Bordry; throughout accompanied by CERN Advisers J. Ellis and E. Tsesmelis.

  3. 16 December 2013 - P. Lavie President of the Technion Institute of Technology in Israel visiting the ATLAS cavern with ATLAS Deputy Spokesperson T. Wengler; visiting the LHC tunnel at Point 1 with Technology Department Head F. Bordry and signing the Guest Book with CERN Director-General R. Heuer. G. Mikenberg, E. Rabinovici, Y. Rozen and S. Tarem present throughout.

    CERN Multimedia

    Jean-Claude Gadmer

    2013-01-01

    16 December 2013 - P. Lavie President of the Technion Institute of Technology in Israel visiting the ATLAS cavern with ATLAS Deputy Spokesperson T. Wengler; visiting the LHC tunnel at Point 1 with Technology Department Head F. Bordry and signing the Guest Book with CERN Director-General R. Heuer. G. Mikenberg, E. Rabinovici, Y. Rozen and S. Tarem present throughout.

  4. 18 December 2013 - P. Kron Chairman and Chief Executive Officer of ALSTOM signing the Guest Book with the Director-General R. Heuer and visiting the LHC tunnel at Point 1 with Technology Department Head F. Bordry. Accompanied by P. Fassnacht throughout.

    CERN Multimedia

    Jean-Claude Gadmer

    2013-01-01

    18 December 2013 - P. Kron Chairman and Chief Executive Officer of ALSTOM signing the Guest Book with the Director-General R. Heuer and visiting the LHC tunnel at Point 1 with Technology Department Head F. Bordry. Accompanied by P. Fassnacht throughout.

  5. Heading and head injuries in soccer.

    Science.gov (United States)

    Kirkendall, D T; Jordan, S E; Garrett, W E

    2001-01-01

    In the world of sports, soccer is unique because of the purposeful use of the unprotected head for controlling and advancing the ball. This skill obviously places the player at risk of head injury and the game does carry some risk. Head injury can be a result of contact of the head with another head (or other body parts), ground, goal post, other unknown objects or even the ball. Such impacts can lead to contusions, fractures, eye injuries, concussions or even, in rare cases, death. Coaches, players, parents and physicians are rightly concerned about the risk of head injury in soccer. Current research shows that selected soccer players have some degree of cognitive dysfunction. It is important to determine the reasons behind such deficits. Purposeful heading has been blamed, but a closer look at the studies that focus on heading has revealed methodological concerns that question the validity of blaming purposeful heading of the ball. The player's history and age (did they play when the ball was leather and could absorb significant amounts of water), alcohol intake, drug intake, learning disabilities, concussion definition and control group use/composition are all factors that cloud the ability to blame purposeful heading. What does seem clear is that a player's history of concussive episodes is a more likely explanation for cognitive deficits. While it is likely that the subconcussive impact of purposeful heading is a doubtful factor in the noted deficits, it is unknown whether multiple subconcussive impacts might have some lingering effects. In addition, it is unknown whether the noted deficits have any affect on daily life. Proper instruction in the technique is critical because if the ball contacts an unprepared head (as in accidental head-ball contacts), the potential for serious injury is possible. To further our understanding of the relationship of heading, head injury and cognitive deficits, we need to: learn more about the actual impact of a ball on the

  6. Heading for a fall? Management of head injury in infants.

    LENUS (Irish Health Repository)

    Williamson, M

    2010-09-01

    Head injury is one of the commonest reasons for infants (< 1 year) to attend the Emergency Department (ED). Clinical management varies considerably and concern about non accidental injury results in a high admission rate in some hospitals. Information was obtained on 103 children under one year of age presenting to the ED with head injury in a prospective study. The average age was 6.7 months and 57% of patients were male. Twenty eight babies had skull x rays with 1 skull fracture diagnosed. None required CT brain scan. Ninety eight (94%) were discharged home from the ED. There were no unplanned returns, readmissions or adverse events. The incidence of traumatic brain injury in children under one year of age presenting with head injury is low and the majority can be safely discharged home.

  7. Beam-beam effects

    Energy Technology Data Exchange (ETDEWEB)

    Zholents, A.

    1994-12-01

    The term beam-beam effects is usually used to designate different phenomena associated with interactions of counter-rotating beams in storage rings. Typically, the authors speak about beam-beam effects when such interactions lead to an increase of the beam core size or to a reduction of the beam lifetime or to a growth of particle`s population in the beam halo and a correspondent increase of the background. Although observations of beam-beam effects are very similar in most storage rings, it is very likely that every particular case is largely unique and machine-dependent. This constitutes one of the problems in studying the beam-beam effects, because the experimental results are often obtained without characterizing a machine at the time of the experiment. Such machine parameters as a dynamic aperture, tune dependencies on amplitude of particle oscillations and energy, betatron phase advance between the interaction points and some others are not well known, thus making later analysis uncertain. The authors begin their discussion with demonstrations that beam-beam effects are closely related to non linear resonances. Then, they will show that a non linearity of the space charge field is responsible for the excitation of these resonances. After that, they will consider how beam-beam effects could be intensified by machine imperfections. Then, they will discuss a leading mechanism for the formation of the beam halo and will describe a new technique for beam tails and lifetime simulations. They will finish with a brief discussion of the coherent beam-beam effects.

  8. Beam-beam observations in the Relativistic Heavy Ion Collider

    Energy Technology Data Exchange (ETDEWEB)

    Luo, Y. [Brookhaven National Laboratory (BNL), Upton, NY (United States); Fischer, W. [Brookhaven National Laboratory (BNL), Upton, NY (United States); White, S. [Brookhaven National Laboratory (BNL), Upton, NY (United States)

    2015-06-24

    The Relativistic Heavy Ion Collider (RHIC) at Brookhaven National Laboratory has been operating since 2000. Over the past decade, thanks to the continuously increased bunch intensity and reduced β*s at the interaction points, the maximum peak luminosity in the polarized proton operation has been increased by more than two orders of magnitude. In this article, we first present the beam-beam observations in the previous RHIC polarized proton runs. Then we analyze the mechanisms for the beam loss and emittance growth in the presence of beam-beam interaction. The operational challenges and limitations imposed by beam-beam interaction and their remedies are also presented. In the end, we briefly introduce head-on beam-beam compensation with electron lenses in RHIC.

  9. 學科領導在課程改革中的角色:香港個案研究Roles of Department Heads in Curriculum Change: A Hong Kong Case Study

    OpenAIRE

    譚彩鳳Choi-Fung Tam

    2007-01-01

    西方研究發現學科組織是學校改進的重要單位,學科領導對推動課程革新、 改善同儕的溝通及協作、重組組織結構等有不少貢獻。本個案研究旨在探索兩位中 文學科領導的角色、風格,並揭示在其領導下學科組織文化的特色。研究發現學科 領導具備多元化的角色,與其職責有密切關係。再者,這兩位領導的風格各有不 同,其中一位具有民主型的領導風格,給同事賦權增能,與他們共享決策權;另一 位卻具有支援性的領導風格,為學科組織成員樹立榜樣。研究揭示學科領導是促進 課程變革的重要人物,其開放態度有利新課程的實施。 Western studies reveal that subject department is an important changing unit for school improvement. Heads of departments contribute significantly to the changes of curriculum, improvement of communication and collaboration among colleagues, and restr...

  10. A Study of the Relationship between Social Influence of Department Heads and Organizational Commitment of Faculty Members (From the Viewpoint of Faculty Members at Isfahan University of Medial Sciences

    Directory of Open Access Journals (Sweden)

    Vahideh Sayadzadeh

    2012-04-01

    Full Text Available The purpose of this research is to study the relationship between social influence of department heads (from the viewpoints of faculty members on organizational commitment of faculty members at Isfahan University of Medical Sciences in the academic year 1387-88. Social influence is composed of 11 items and organizational commitment has 3 items. The Research method is survey, and research population is all faculty members at Isfahan University of Medical Science, whose number is 645. Of this number, 104 individuals were randomly selected to constitute research sample size. The Data was collected by means of two questionnaires: Yukl’s (2003 social influence questionnaire, which has 44 items and Allen &Meyer’s Organizational Commitment questionnaire with 24 items, which considers demographic characteristics such as sex, age, education, academic ranking, management experience and place of study. The reliability coefficients of these questionnaires were 83% and76%, respectively. Our correlation analysis indicates that although there is not a significant relationship between research variables and demographic characteristics, significant relationships exist between some of the indices of social influence and organizational commitment. Items of co-operation, ingratiation, consolation, and personal attractiveness are in a meaningful relationship with organizational commitment.

  11. Management of head injuries in children.

    Science.gov (United States)

    Conchie, Henry; Palmer, Sarah; Fernando, Katalin; Paul, Siba Prosad

    2016-07-01

    Head injury is the most common cause of injury-related death and permanent disability in children. Minor head trauma is common in childhood and does not require any medical treatment. Although deficits can occur even after mild to moderate head injury, they are markedly greater and become clinically evident following severe head injury. It is important that emergency department clinicians are aware of the signs and symptoms that indicate severe traumatic brain injury and triage for urgent intervention in those children who present with these signs and symptoms. Clinicians also need to know when children can be sent home with reassurance and information, and when they require admission or transfer to a neurosurgical unit. This article examines the literature on head injuries in children, describes assessment, management and treatment, and provides a simple management algorithm. PMID:27384805

  12. A modified face mask device for radiotherapy of head and neck tumor

    International Nuclear Information System (INIS)

    The reproducibility during radiotherapy of head and neck tumors has been significantly improved by special devices like individual masks. However, the temporary fixation of head and neck region to the irradiation berth induces in many patients anxiety state and reduces this way the compliance. By means of modification of the device used till now a new model in which the set up mask is only coupled to the berth, could be developed. The clinical evaluation showed that this form of fixation device is much better tolerated by the patients and can be adapted without any problems to all equipment pieces in a radiotherapy department. The estimated reproducibility was comparable to that obtained with mounted device. The average translation of the central beam during 21 days observation period was 2.6±1.4 mm (0 to 9 mm) in the sagittal plane and 3.4±1.0 mm (1 to 8 mm) in the frontal plane. (orig.)

  13. Head injury - first aid

    Science.gov (United States)

    ... medlineplus.gov/ency/article/000028.htm Head injury - first aid To use the sharing features on this page, ... a concussion can range from mild to severe. First Aid Learning to recognize a serious head injury and ...

  14. Computed Tomography (CT) -- Head

    Medline Plus

    Full Text Available ... provides more detailed information on head injuries, stroke , brain tumors and other brain diseases than regular radiographs (x-rays). top of ... the head is typically used to detect: bleeding, brain injury and skull fractures in patients with head ...

  15. Computed Tomography (CT) -- Head

    Medline Plus

    Full Text Available ... Physician Resources Professions Site Index A-Z Computed Tomography (CT) - Head Computed tomography (CT) of the head uses special x-ray ... What is CT Scanning of the Head? Computed tomography, more commonly known as a CT or CAT ...

  16. Experimental demonstration of beam-beam compensation by Tevatron electron lenses and prospects for the LHC

    Energy Technology Data Exchange (ETDEWEB)

    Shiltsev, V.; Alexahin, Y.; Kamerdzhiev, V.; Kuznetsov, G.; Zhang, X.L.; /Fermilab; Bishofberger, K.; /Los Alamos

    2007-06-01

    Electromagnetic long-range and head-on interactions of high intensity proton and antiproton beams are significant sources of beam loss and lifetime limitations in the Tevatron Collider Run II (2001-present). We present observations of the beam-beam phenomena in the Tevatron and results of relevant beam studies. We analyze the data and various methods employed in high energy physics (HEP) operation, predict the performance for planned luminosity upgrades and discuss ways to improve it.

  17. Beam-beam compensation studies in the Tevatron with electron lenses

    CERN Document Server

    Stancari, Giulio

    2013-01-01

    At the Fermilab Tevatron collider, we studied the feasibility of suppressing the antiproton head-on beam-beam tune spread using a magnetically confined 5-keV electron beam with Gaussian transverse profile overlapping with the circulating beam. When electron cooling of antiprotons was applied in regular Tevatron operations, the nonlinear head-on beam-beam effect on antiprotons was small. Therefore, we first focused on the operational aspects, such as beam alignment and stability, and on fundamental observations of tune shifts, tune spreads, lifetimes, and emittances. We also attempted two special collider stores with only 3 proton bunches colliding with 3 antiproton bunches, to suppress long-range forces and enhance head-on effects. We present here the results of this study and a comparison between numerical simulations and observations. These results contributed to the application of this compensation concept to RHIC at Brookhaven.

  18. Head CT scan in Iranian minor head injury patients: evaluating current decision rules.

    Science.gov (United States)

    Sadegh, Robab; Karimialavijeh, Ehsan; Shirani, Farzaneh; Payandemehr, Pooya; Bahramimotlagh, Hooman; Ramezani, Mahtab

    2016-02-01

    The objective of this study is to select one of the seven available clinical decision rules for minor head injury, for managing Iranian patients. This was a prospective cohort study evaluating medium- or high-risk minor head injury patients presenting to the Emergency Department. Patients with minor head trauma who were eligible for brain imaging based on seven available clinical decision rules (National Institute for Health and Clinical Excellence (NICE), National Emergency X-Radiography Utilization Study (NEXUS)-II, Neurotraumatology Committee of the World Federation of Neurosurgical Societies (NCWFNS), New Orleans, American College of Emergency Physicians (ACEP) Guideline, Scandinavian, and Canadian computed tomography (CT) head rule) were selected. Subjects were underwent a non-contrast axial spiral head CT scan. The outcome was defined as abnormal and normal head CT scan. Univariate analysis and stepwise linear regression were applied to show the best combination of risk factors for detecting CT scan abnormalities. Five hundred patients with minor head trauma were underwent brain CT scan. The following criteria were derived by stepwise linear regression: Glasgow Coma Scale (GCS) less than 15, confusion, signs of basal skull fracture, drug history of warfarin, vomiting more than once, loss of consciousness, focal neurologic deficit, and age over 65 years. This model has 86.15 % (75.33-93.45 %) sensitivity and 46.44 % (46.67-51.25 %) specificity in detecting minor head injury patients with CT scan abnormalities (95 % confidence interval). Of seven decision rules, only the Canadian CT Head Rule possesses seven of the eight high-risk factors associated with abnormal head CT results which were identified by this study. This study underlines the Canadian CT Head Rule's utility in Iranian minor head injury patients. Our study encourages researchers to evaluate available guidelines in different communities. PMID:26407978

  19. Risks of intracranial haematoma in head injured adults.

    OpenAIRE

    Mendelow, A D; Teasdale, G; Jennett, B; Bryden, J; Hessett, C; Murray, G.

    1983-01-01

    A study was conducted to estimate the risk that an adult (age 15 or over) will develop a surgically significant intracranial haematoma after a head injury. Two simple features were used that can be recognised by clinicians with minimal training: a skull fracture and the conscious level. The risks were calculated from samples of 545 patients with haematomas, 2773 head injured patients in accident and emergency departments, and 2783 head injured patients in primary surgical wards. With radiolog...

  20. 21 CFR 892.1920 - Radiographic head holder.

    Science.gov (United States)

    2010-04-01

    ... 21 Food and Drugs 8 2010-04-01 2010-04-01 false Radiographic head holder. 892.1920 Section 892.1920 Food and Drugs FOOD AND DRUG ADMINISTRATION, DEPARTMENT OF HEALTH AND HUMAN SERVICES (CONTINUED) MEDICAL DEVICES RADIOLOGY DEVICES Diagnostic Devices § 892.1920 Radiographic head holder....

  1. Computed Tomography (CT) -- Head

    Medline Plus

    Full Text Available Toggle navigation Test/Treatment Patient Type Screening/Wellness Disease/Condition Safety En Español More Info Images/Videos News Physician Resources Professions Site Index A-Z Computed Tomography (CT) - Head What is CT Scanning of the Head? What are some ...

  2. Head and Neck

    DEFF Research Database (Denmark)

    Højgaard, Liselotte; Berthelsen, Anne Kiil; Loft, Annika

    2014-01-01

    Positron emission tomography (PET)/computed tomography with FDG of the head and neck region is mainly used for the diagnosis of head and neck cancer, for staging, treatment evaluation, relapse, and planning of surgery and radio therapy. This article is a practical guide of imaging techniques...

  3. Computed Tomography (CT) -- Head

    Medline Plus

    Full Text Available ... Computed tomography (CT) of the head uses special x-ray equipment to help assess head injuries, severe headaches, ... is a diagnostic medical test that, like traditional x-rays, produces multiple images or pictures of the inside ...

  4. Computed Tomography (CT) -- Head

    Medline Plus

    Full Text Available ... the head is typically used to detect: bleeding, brain injury and skull fractures in patients with head injuries. bleeding caused by a ruptured or leaking aneurysm in a patient with a sudden severe headache. a blood clot or bleeding within the brain shortly after a patient exhibits symptoms of a ...

  5. American Head and Neck Society

    Science.gov (United States)

    American Head & Neck Society Head and Neck Cancer Research & Education American Head & Neck Society | AHNS Head and Neck Cancer Research & Education About AHNS ... and Announcements Copyright ©2016 · American Head and Neck Society · Privacy and Return Policy Managed by BSC Management, ...

  6. COMPORTAMIENTO DE GENOTIPOS DE TRIGO A LA FUSARIOSIS DE LA ESPIGA EN EL DEPARTAMENTO DE NARIÑO,COLOMBIA WHEAT GENOTYPES BEHAVIOR TO FUSARIUM HEAD BLIGHT IN NARIÑO DEPARTMENT, COLOMBIA

    Directory of Open Access Journals (Sweden)

    Martín Esteban Reyes Caicedo

    2010-06-01

    Full Text Available La Fusariosis de la espiga del trigo (FET causada por el hongo Fusarium spp., se registra como una de las enfermedades más limitantes en el departamento de Nariño, Colombia, debido a la alta prevalencia y a la ausencia de técnicas de manejo eficientes. Este trabajo se planteó con el fin de evaluar el comportamiento de diferentes genotipos de trigo respecto a la incidencia del patógeno y su efecto sobre los componentes de rendimiento. Se estudiaron 45 genotipos, 13 provenientes de la colección de CORPOICA y 32 cedidos por la Facultad de Ciencias Agrícolas de la Universidad de Nariño. Se realizó la purificación y multiplicación del hongo a partir de espigas afectadas. La inoculación en el campo se hizo con bomba manual de 20 litros, en espigamiento del cultivo. El ensayo constó de 45 tratamientos en un diseño de bloques al azar con cuatro repeticiones. Se analizaron la incidencia de la enfermedad en espiga y grano, las macollas efectivas, el número de granos por espiga, el peso de 1000 granos y el rendimiento en kg/ha. Se identificaron 10 genotipos con resistencia a FET y dos de ellos con buen comportamiento agronómico. Particularmente el genotipo L23 presentó una reacción altamente resistente (AR y resistente (R en la evaluación de incidencia en espiga y grano respectivamente. Se destaca que los genotipos que mostraron resistencia a la enfermedad tienen como progenitor la variedad ICA YACUANQUER que se registra con moderada resistencia a la FET.The Fusarium sead blight of wheat caused by Fusarium spp. is registred in the Nariño Department (Colombia, like one of most limiting diseases, due to the high prevalence and the poor management techniques. This research was carried out in orfer to evaluate the reaction of different wheat genotypes inoculated with the pathogen, and the effect on yield components. 45 genotypes were evaluated, 13 of them proceeding from CORPOICA Colletion, and 32 giving by the Agricultural Science School

  7. A virtual model of the patient's head for BNCT

    International Nuclear Information System (INIS)

    The aim of the present work was creating a virtual phantom of a human head for BNCT, as a part of the BNCT programme project. This model is an amplification of the simple model described in earlier publications. It takes into account the major head organs as well as the scalp and skull. The chemical composition of all tissues was modelled according to the recommendations of the ICRP. The organs were parameterized using mathematical formulas based on the human head magnetic resonance images. The model was used for calculating the thermal neutron flux and the injuring (fast neutron, nitrogen and gamma) dose components for the head irradiated using the therapeutic neutron beam, whose parameters were obtained as the result of the modelling of the filter/moderator system for the BNCT therapeutic beam from the MARIA reactor. (authors)

  8. Office of Head Start (OHS) Program Fact Sheet

    Data.gov (United States)

    U.S. Department of Health & Human Services — Office of Head Start (OHS) Program Fact Sheet provides information on demographics, state allocations, program statistics, and program enrollment history.

  9. Backscatter A [8101]--Offshore of Bodega Head, California

    Data.gov (United States)

    U.S. Geological Survey, Department of the Interior — This part of DS 781 presents data for the acoustic-backscatter map of the Offshore of Bodega Head map area, California. Backscatter data are provided as separate...

  10. Backscatter C [Swath]--Offshore of Bodega Head, California

    Data.gov (United States)

    U.S. Geological Survey, Department of the Interior — This part of DS 781 presents data for the acoustic-backscatter map of the Offshore of Bodega Head map area, California. Backscatter data are provided as separate...

  11. Backscatter B [7125]--Offshore of Bodega Head, California

    Data.gov (United States)

    U.S. Geological Survey, Department of the Interior — This part of DS 781 presents data for the acoustic-backscatter map of the Offshore of Bodega Head map area, California. Backscatter data are provided as separate...

  12. Faults--Offshore of Bodega Head Map Area, California

    Data.gov (United States)

    U.S. Geological Survey, Department of the Interior — This part of DS 781 presents data for faults for the geologic and geomorphic map of the Offshore of Bodega Head map area, California. The vector data file is...

  13. Folds--Offshore of Bodega Head Map Area, California

    Data.gov (United States)

    U.S. Geological Survey, Department of the Interior — This part of DS 781 presents data for folds for the geologic and geomorphic map of the Offshore of Bodega Head map area, California. The vector data file is...

  14. Head trauma in female professional wrestlers

    International Nuclear Information System (INIS)

    The clinical characteristics of head trauma were evaluated in 18 wrestlers belonging to a female professional wrestling organization, 13 regular members and five trainees aged 15-34 years. Medical examinations for head trauma were performed in all wrestlers, and wrestlers treated at our emergency outpatient department were clinically evaluated. In addition, the relationships of head trauma with duration of the wrestling career of 1-16 years (mean 8 years) in the regular members, and less than 1 year in the five trainees, and body mass index (BMI) of 21.0-32.0 in the 16 subjects, excluding two trainees, was evaluated. Chronic symptoms were noted in four of the 18 wrestlers with long wrestling careers (16 years in 1, 13 years in 1, and 5 years in 2). Three wrestlers with symptoms immediately after head trauma showed recurrent retrograde amnesia and had low BMI (21.6, 21.6, and 23.1). Five wrestlers were treated at our emergency outpatient clinic, three required hospitalization and two showed intracranial traumatic changes on computed tomography (acute subdural hematoma in 1 and diffuse brain swelling in 1). Head trauma in female professional wrestlers is associated with longer wrestling career and low BMI. Periodic medical examinations are recommended to monitor for signs of head trauma. (author)

  15. Electronics Department. Progress Report 1984

    DEFF Research Database (Denmark)

    Risø National Laboratory, Roskilde

    This report summarizes the activities in the Electronics Department in 1984. These include work under the headings of informatics, applied laser physics, nuclear geophysics, instrumentation and measuring techniques, and instrumentation consulting, registration and maintenance for the Danish...

  16. Compressed beam directed particle nuclear energy generator

    International Nuclear Information System (INIS)

    This invention relates to the generation of energy from the fusion of atomic nuclei which are caused to travel towards each other along collision courses, orbiting in common paths having common axes and equal radii. High velocity fusible ion beams are directed along head-on circumferential collision paths in an annular zone wherein beam compression by electrostatic focusing greatly enhances head-on fusion-producing collisions. In one embodiment, a steady radial electric field is imposed on the beams to compress the beams and reduce the radius of the spiral paths for enhancing the particle density. Beam compression is achieved through electrostatic focusing to establish and maintain two opposing beams in a reaction zone

  17. Head injury: audit of a clinical guideline to justify head CT

    International Nuclear Information System (INIS)

    Head injury causes significant morbidity and mortality, and there is contention about which patients to scan. The UK National Health Service Clinical Guideline (CG) 56 provides criteria for selecting patients with clinically important brain injury who may benefit from a head CT scan, while minimising the radiation and economic burden of scanning patients without significant injury. This study aims to audit the documentation of the use of these guidelines in a busy UK trauma hospital and discusses the comparison with an Australian (New South Wales (NSW) ) head injury guideline. A retrospective cohort study of 480 patients presenting with head injury to the emergency department over 2 months was performed. The patient notes were assessed for documentation of each aspect of the clinical guidelines. Criteria were established to assess the utilisation of the CG 56. A database of clinical data was amalgamated with the head CT scan results for each patient. For the UK CG 56, 73% of the criteria were documented, with the least documented being 'signs of basal skull fracture' and 'amnesia of events'. Thirty-two per cent of patients received head CT and of these, 24% (37 patients) were reported to have pathology. Twenty-four patients underwent head CT without clinical justification being documented, none of which had reported pathology on CT. The study shows that the head injury guidelines are not being fully utilised at a major UK trauma hospital, resulting in 5% of patients being exposed to ionising radiation without apparent documented clinical justification. The NSW guideline has distinct differences to the CG 56, with a more complex algorithm and an absence of specific time frames for head CT completion. The results suggest a need for further education and awareness of head injury clinical guidelines.

  18. Computed Tomography (CT) -- Head

    Medline Plus

    Full Text Available ... changes are present in the paranasal sinuses. plan radiation therapy for cancer of the brain or other tissues. ... of page Additional Information and Resources RTAnswers.org Radiation Therapy for Brain Tumors Radiation Therapy for Head and ...

  19. Computed Tomography (CT) -- Head

    Medline Plus

    Full Text Available ... scanning provides more detailed information on head injuries, stroke , brain tumors and other brain diseases than regular ... shortly after a patient exhibits symptoms of a stroke. a stroke, especially with a new technique called ...

  20. Computed Tomography (CT) -- Head

    Medline Plus

    Full Text Available ... provides more detailed information on head injuries, stroke , brain tumors and other brain diseases than regular radiographs (x- ... especially with a new technique called Perfusion CT. brain tumors. enlarged brain cavities (ventricles) in patients with hydrocephalus . ...

  1. Computed Tomography (CT) -- Head

    Medline Plus

    Full Text Available ... Videos related to Computed Tomography (CT) - Head About this Site RadiologyInfo.org is produced by: Please note ... you can search the ACR-accredited facilities database . This website does not provide cost information. The costs ...

  2. Computed Tomography (CT) -- Head

    Medline Plus

    Full Text Available ... dose technique. top of page What are the limitations of CT Scanning of the Head? A person ... CT scanner or may be over the weight limit—usually 450 pounds—for the moving table. Compared ...

  3. Computed Tomography (CT) -- Head

    Medline Plus

    Full Text Available ... headaches, dizziness, and other symptoms of aneurysm, bleeding, stroke and brain tumors. It also helps your doctor ... scanning provides more detailed information on head injuries, stroke , brain tumors and other brain diseases than regular ...

  4. Overview of Head Injuries

    Science.gov (United States)

    ... Children are admitted to the hospital for these reasons or if they were unconscious even briefly or had a seizure. Children are also admitted to the hospital if child abuse is suspected. Severe head injury If the injury ...

  5. Abnormal Head Position

    Science.gov (United States)

    ... cause a head tilt. This is typically called congenital torticollis. A patch test in the office can also ... amblyopia) are other treatment alternatives. Physical therapy helps congenital torticollis from tight neck muscles. Updated 03/2015 Eye ...

  6. Foreign heading machines

    Energy Technology Data Exchange (ETDEWEB)

    Kovtun, E.P.; Chernomaz, O.L.

    1983-12-01

    A general review is presented of heading machines currently produced, divided into pointed arm, drilling and impact types. Pointed arm machines described include models manufactured by Thyssen Titan, Dosco, Anderson Strathclyde and Anderson Meyvor (UK), Mannesman Demag, Eikchoff, Paurat and Westfalia-Luenen (FRG), Jeffrey Machinery, Joy Manufacturing, Lee Norse and National Mine Service (USA), Voest-Alpine (Austria and under licence in Poland), Kawasaki and Nippon Koki (Japan). Drilling heading machines include models manufactured by Atlas Copco-Jarva (USA-Sweden), Robbins (USA), Demag (FRG; TVM model) and others. Impact heading machines are described generally, giving basic parameter ranges, with mention of their advantages: such as light weight, low dust emission, small preliminary preparation requirements, etc. Further developments in and wider use of heading machines are predicted, and mention is made of research into cutting methods using very high pressure jets in combination with mechanical cutting (USA, FRG, Japan).

  7. Computed Tomography (CT) -- Head

    Medline Plus

    Full Text Available Toggle navigation Test/Treatment Patient Type Screening/Wellness Disease/Condition Safety En Español More Info Images/Videos News Physician Resources Professions Site Index A-Z Computed Tomography (CT) - Head ...

  8. Computed Tomography (CT) -- Head

    Medline Plus

    Full Text Available ... special x-ray equipment to help assess head injuries, severe headaches, dizziness, and other symptoms of aneurysm, ... cancer. In emergency cases, it can reveal internal injuries and bleeding quickly enough to help save lives. ...

  9. Bessel Beams

    OpenAIRE

    McDonald, Kirk T

    2000-01-01

    Scalar Bessel beams are derived both via the wave equation and via diffraction theory. While such beams have a group velocity that exceeds the speed of light, this is a manifestation of the "scissors paradox" of special relativty. The signal velocity of a modulated Bessel beam is less than the speed of light. Forms of Bessel beams that satisfy Maxwell's equations are also given.

  10. Head and neck teratomas

    OpenAIRE

    Shah, Ajaz; Latoo, Suhail; Ahmed, Irshad; Malik, Altaf H

    2009-01-01

    Teratomas are complex lesions composed of diverse tissues from all 3 germinal cell layers and may exhibit variable levels of maturity. Head and neck teratomas are most commonly cervical with the oropharynx (epignathus) being the second commonest location. In this article, clinical presentation, behaviour and associated significance of head and neck teratomas have been highlightened. Because of their obscure origin, bizarre microscopic appearance, unpredictable behaviour and often dramatic cli...

  11. Standard integrated head package

    International Nuclear Information System (INIS)

    An integrated head package for a standard-type nuclear reactor is described which consolidates many components and subassemblies of the upper reactor structure into a single unit which may be removed from the reactor vessel in a single lift. Included among the consolidated elements are a pressure vessel head, a cooling shroud, control rod drive mechanisms, a missile shield, a lifting rig, a hoist assembly, and a cable tray assembly. (author)

  12. 14 CFR 97.5 - Bearings, courses, tracks, headings, radials, miles.

    Science.gov (United States)

    2010-01-01

    ... 14 Aeronautics and Space 2 2010-01-01 2010-01-01 false Bearings, courses, tracks, headings, radials, miles. 97.5 Section 97.5 Aeronautics and Space FEDERAL AVIATION ADMINISTRATION, DEPARTMENT OF... Bearings, courses, tracks, headings, radials, miles. (a) All bearings, courses, tracks, headings,...

  13. Surrogate Head Forms for the Evaluation of Head Injury Risk

    OpenAIRE

    MacAlister, Anna

    2013-01-01

    This paper summarizes the use of surrogate head forms in biomechanical research pertaining to head injury and, more specifically, mild traumatic brain injury. Because cadavers are limited and controlled studies of brain injury using live human subjects would be unethical, surrogate head forms are used to study the response of the human head to impact. Different head forms have been developed and optimized for different purposes. The Hybrid III 50th percentile male crash test dummy was develop...

  14. A human head phantom for experimental dosimetry

    International Nuclear Information System (INIS)

    In order to achieve a better understanding of the behavior of nuclear particles in a human head experiment a phantom preserving similar tissues as well as similar anthropomorphic characteristics was used. In this work a biologic equivalent tissue material was developed, maintaining the chemical composition and tissue density, based on enriched PMMA. A humanoid head phantom was built using a human skull as a base, donated by the Morphology Department of the Institute for Biologic Sciences-ICB/UFMG. Muscles were replaced with biologic equivalent tissue material following anatomic precepts. The phantom presents: formalized animal salivary glands, brain and submandibular lymph nodes; human teeth; hair; prosthetic eyes and nose as well as human equivalent skin containing silicone and animal collagen. This phantom present several important conditions as human morphological characteristics, equivalent biological tissue and the head bone structure. It will be used in radiotherapy and brachytherapy studies, dosimetry and quality control of medical diagnostic image. (author)

  15. Magnetic Resonance Imaging (MRI) -- Head

    Medline Plus

    Full Text Available ... News Physician Resources Professions Site Index A-Z Magnetic Resonance Imaging (MRI) - Head Magnetic resonance imaging (MRI) of the head uses a powerful ... the Head? What is MRI of the Head? Magnetic resonance imaging (MRI) is a noninvasive medical test that ...

  16. Magnetic Resonance Imaging (MRI) -- Head

    Medline Plus

    Full Text Available ... Physician Resources Professions Site Index A-Z Magnetic Resonance Imaging (MRI) - Head Magnetic resonance imaging (MRI) of the head uses a powerful ... Head? What is MRI of the Head? Magnetic resonance imaging (MRI) is a noninvasive medical test that ...

  17. Magnetic Resonance Imaging (MRI) -- Head

    Medline Plus

    Full Text Available ... News Physician Resources Professions Site Index A-Z Magnetic Resonance Imaging (MRI) - Head Magnetic resonance imaging (MRI) of the head ... limitations of MRI of the Head? What is MRI of the Head? Magnetic resonance imaging (MRI) is ...

  18. Economics of head injuries

    Directory of Open Access Journals (Sweden)

    Singh Manmohan

    2006-01-01

    Full Text Available Summary: Head injuries account for significant proportion of neurosurgical admissions and bed occupancy. Patients with head injuries also consume significant proportions of neurosurgical resources. A prospective 6-month study has been carried out to evaluate the expenditure incurred on head injury patients in a modern neurosurgical center equipped with state of the art infrastructure. Costing areas included wages / salaries of health care personnel, cost of medicines / surgical items / crystalloids, general store items, stationary, all investigation charges, equipment cost, overhead building cost, maintenance cost, electricity and water charges and cost of medical gases, air conditioning and operation theatre expenses. Expenditure in each area was calculated and apportioned to each bed. The statistical analysis was done using X2 test. The cost of stay in ward was found to be Rs. 1062 / bed / day and in neurosurgical ICU Rs. 3082 / bed / day. The operation theatre cost for each surgery was Rs. 11948. The cost of hospital stay per day for minor, moderate and severe head injury group was found to be Rs. 1921, Rs. 2569 and Rs. 2713 respectively. The patients who developed complications, the cost of stay per day in the hospital were Rs. 2867. In the operative group, the cost of hospital stay per day was Rs. 3804. The total expenditure in minor head injury was Rs. 7800 per patient, in moderate head injury was Rs. 22172 per patient, whereas in severe head injury, it was found to be Rs. 32852 per patient. Patients who underwent surgery, the total cost incurred was Rs. 33100 per operated patient.

  19. 29 September 2015 - Vice-President of the Government of Spain S. Sáenz de Santamaría in the ATLAS visitor centre, the Synchrocyclotron, the Data Centre visit point and the LHC magnet facility with CERN Director-General R. Heuer and Technology Department Head J.M. Jiménez.

    CERN Multimedia

    Bennett, Sophia Elizabeth

    2015-01-01

    Were also present from Spain: Sra. Carmen Vela, Secretaria de Estado de Investigación, Desarrollo e Innovación, Sr. D. Bernardo de Sicart Escoda Embajador de España en Berna, Sra. Da Ana Menéndez Pérez, Embajadora Representante Permanente de España ante Naciones Unidas y OOII con sede en Ginebra, Sra. Da María Pico Directora del Gabinete de la Vicepresidenta and Sr. D. Miguel Temboury Redondo Subsecretario de Economía y Competitividad. And from CERN: Dr Maria Alandes Pradillo, Information Technology Department, Dr Maria Barroso-Lopez Deputy Group Leader, IT-PES, Dr Frédérick Bordry, Director of Accelerators and Technology, Dr Borja Fernandez Adiego Engineering Department, Prof. Maria Jose Garcia Borge ISOLDE Collaboration Spokesperson, Dr Fabiola Gianotti Director-General elect 2016-2020, Mr Frédéric Hemmer Information Technology Department Head, Prof. Mario Martinez, Spanish Scientific Delegate to CERN Council Mr Guillermo Merino Fernandez, Technology Department Mr Lluis Miralles, General Infrast...

  20. Meteor head echoes - observations and models

    Directory of Open Access Journals (Sweden)

    A. Pellinen-Wannberg

    2005-01-01

    Full Text Available Meteor head echoes - instantaneous echoes moving with the velocities of the meteors - have been recorded since 1947. Despite many attempts, this phenomenon did not receive a comprehensive theory for over 4 decades. The High Power and Large Aperture (HPLA features, combined with present signal processing and data storage capabilities of incoherent scatter radars, may give an explanation for the old riddle. The meteoroid passage through the radar beam can be followed with simultaneous spatial-time resolution of about 100m-ms class. The current views of the meteor head echo process will be presented and discussed. These will be related to various EISCAT observations, such as dual-frequency target sizes, altitude distributions and vector velocities.

  1. Recycled Paper Beam Sculpture

    Science.gov (United States)

    Keller, Kristin; Tabacchi, Jo

    2011-01-01

    As art department budgets across the country continue to shrink, art teachers are increasingly on the lookout for inexpensive materials that can be used to teach a range of concepts. In this article, the authors describe a newspaper beam tower project inspired by the book, "The Wonderful Towers of Watts" by Patricia Zelver. There are many more…

  2. Head First Statistics

    CERN Document Server

    Griffiths, Dawn

    2009-01-01

    Wouldn't it be great if there were a statistics book that made histograms, probability distributions, and chi square analysis more enjoyable than going to the dentist? Head First Statistics brings this typically dry subject to life, teaching you everything you want and need to know about statistics through engaging, interactive, and thought-provoking material, full of puzzles, stories, quizzes, visual aids, and real-world examples. Whether you're a student, a professional, or just curious about statistical analysis, Head First's brain-friendly formula helps you get a firm grasp of statistics

  3. Medical Department

    International Nuclear Information System (INIS)

    Within Brookhaven National Laboratory, the life sciences program is carried out under two departments, the Medical Department and the Biological Department. The Medical Research Center contains three major divisions: the Hospital, the Research Laboratories, and the Occupational Medicine Clinic. The hospital, which is devoted entirely to research patients, supports clinical studies in: pulmonary diseases; neuropsychiatric disorders; hematological diseases (e.g., chronic lymphocytic leukemia); cardiopulmonary disorders; hepatobiliary dysfunction; cancer of various types; toxicological problems; bone and mineral metabolism; and dietary and nutritional disorders. Research efforts are also made to improve therapeutic measures for disease: brain tumor therapy through boron capture of epithermal neutrons, and proton beam irradiation; extracorporeal irradiation of blood in leukemia; iron chelator efficacy in thalassemia; and nonsurgical treatment of ocular melanoma. Early diagnoses and studies of the mechanism of disease are approached through medical applications of nuclear technology, including positron emission tomography. Work carried out within the Biological Department includes: biological structure determination, molecular genetics, DNA repair and plant sciences. A large part of the research is devoted to understanding how biological systems work. Central to this aim is the study of DNA. This includes effects of damage by physical and chemical agents, gene cloning of bacteria and plants and effects of low doses of radiation and other energy derived hazards

  4. Development of multifunction laser welding head (2). Stress improvement by laser peening technology

    International Nuclear Information System (INIS)

    Multifunction laser welding head has been developed. The head is able to perform not only underwater laser welding as repair, but also laser peening as preventive maintenance and laser ultrasonic testing as inspection. By using the effect of color aberration with optics, laser beam was focused to the ideal spot size on each process. Laser peening was performed on the material surface with the developed head, and stress improvement ability was confirmed. (author)

  5. 16 February 2016 - British Ambassador to the United Nations and Other International Organisations at Geneva signing the guest book with CERN Director-General F. Gianotti and Beams Department Head P. Collier.

    CERN Multimedia

    Brice, Maximilien

    2016-01-01

    His Excellency Mr Julian Braithwaite Ambassador and Permanent Representative of the United Kingdom of Great Britain and Northern Ireland to the United Nations and Other International Organisations at Geneva

  6. Transverse beam shape measurements of intense proton beams using optical transition radiation

    Energy Technology Data Exchange (ETDEWEB)

    Scarpine, Victor E.; /Fermilab

    2012-03-01

    A number of particle physics experiments are being proposed as part of the Department of Energy HEP Intensity Frontier. Many of these experiments will utilize megawatt level proton beams onto targets to form secondary beams of muons, kaons and neutrinos. These experiments require transverse size measurements of the incident proton beam onto target for each beam spill. Because of the high power levels, most beam intercepting profiling techniques will not work at full beam intensity. The possibility of utilizing optical transition radiation (OTR) for high intensity proton beam profiling is discussed. In addition, previous measurements of OTR beam profiles from the NuMI beamline are presented.

  7. 9 February 2012 - Permanent Representative of the Kingdom of Spain to the United Nations Office at Geneva and other International Organisations, Ambassador A. Santos Maraver signing the guest book with CERN Director-General; in the CERN Control Centre with N. Catalan; visiting the LHC tunnel at Point 5 and CMS underground experimental area with Collaboration Spokesperson J. Incandela; throughout accompanied by Adviser J. Salicio Diez and Former Physics Deputy Department Head L. Alvarez Gaumé.

    CERN Multimedia

    Visual Media Office

    2012-01-01

    9 February 2012 - Permanent Representative of the Kingdom of Spain to the United Nations Office at Geneva and other International Organisations, Ambassador A. Santos Maraver signing the guest book with CERN Director-General; in the CERN Control Centre with N. Catalan; visiting the LHC tunnel at Point 5 and CMS underground experimental area with Collaboration Spokesperson J. Incandela; throughout accompanied by Adviser J. Salicio Diez and Former Physics Deputy Department Head L. Alvarez Gaumé.

  8. 19 January 2011 - British University of Manchester, Vice-President and Dean for the Faculty of Engineering and Physical Sciences Professor of Structural Engineering School of Mechanical, Aerospace and Civil Engineering C. Bailey in CERN Control Centre with Department Head P. Collier; at LHCb with R. Lindner and ATLAS underground experimental area with Deputy Spokesperson D. Charlton, througout accompanied by . Collier with R. Appleby and F. Loebinger

    CERN Multimedia

    Maximilien Brice

    2011-01-01

    19 January 2011 - British University of Manchester, Vice-President and Dean for the Faculty of Engineering and Physical Sciences Professor of Structural Engineering School of Mechanical, Aerospace and Civil Engineering C. Bailey in CERN Control Centre with Department Head P. Collier; at LHCb with R. Lindner and ATLAS underground experimental area with Deputy Spokesperson D. Charlton, througout accompanied by . Collier with R. Appleby and F. Loebinger

  9. 21 March 2011 - South African Ministry of Science and Technology, Department of Science and Technology (DST) Director General P. Mjwara signing the guest with Head of International Relations F. Pauss and Adviser J. Ellis and ALICE Collaboration Spokesperson P. Giubellino and J. Cleymans; in the CERN control centre with R. Steerenberg; visiting ALICE surface exhibition with P. Giubellino and LHC superconducting magnet test hall with L. Bottura.

    CERN Multimedia

    Maximilien Brice

    2011-01-01

    21 March 2011 - South African Ministry of Science and Technology, Department of Science and Technology (DST) Director General P. Mjwara signing the guest with Head of International Relations F. Pauss and Adviser J. Ellis and ALICE Collaboration Spokesperson P. Giubellino and J. Cleymans; in the CERN control centre with R. Steerenberg; visiting ALICE surface exhibition with P. Giubellino and LHC superconducting magnet test hall with L. Bottura.

  10. 24 February 2012 - Portuguese Minister for Education and Science N. Crato visiting the LHC superconducting magnet test hall with technology Department Head F. Bordry and signing the guest book with CERN Director-General R. Heuer. The Minister is accompanied by Secretary of State for Science L. Parreira and LIP Director J.M. Gago. A. Henriques(ATLAS), C. Lourenço (CMS) and Adviser R. Voss accompany the delegation throughout.

    CERN Multimedia

    Maximilien Brice

    2012-01-01

    On 24 February Nuno Crato, the Portuguese minister for education and science, left, toured the LHC superconducting-magnet test hall accompanied by Frédérick Bordry, CERN’s technology department head. He also took the opportunity to visit the underground experimental areas of ATLAS and CMS, and heard about the LHC Computing Grid Project before meeting Portuguese scientists working at CERN.

  11. 18 December 2012 -Portuguese President of FCT M. Seabra visiting the Computing Centre with IT Department Head F. Hemmer, ATLAS experimental area with Collaboration Spokesperson F. Gianotti and A. Henriques Correia, in the LHC tunnel at Point 2 and CMS experimental area with Deputy Spokesperson J. Varela, signing an administrative agreement with Director-General R. Heuer; LIP President J. M. Gago and Delegate to CERN Council G. Barreia present.

    CERN Multimedia

    Samuel Morier-Genoud

    2012-01-01

    18 December 2012 -Portuguese President of FCT M. Seabra visiting the Computing Centre with IT Department Head F. Hemmer, ATLAS experimental area with Collaboration Spokesperson F. Gianotti and A. Henriques Correia, in the LHC tunnel at Point 2 and CMS experimental area with Deputy Spokesperson J. Varela, signing an administrative agreement with Director-General R. Heuer; LIP President J. M. Gago and Delegate to CERN Council G. Barreia present.

  12. Head CT scan

    Science.gov (United States)

    Brain CT; Cranial CT; CT scan - skull; CT scan - head; CT scan - orbits; CT scan - sinuses; Computed tomography - cranial ... The x-rays produced by the CT scan are painless. Some people may ... hard table. Contrast given through a vein may cause a: Slight ...

  13. Computed Tomography (CT) -- Head

    Medline Plus

    Full Text Available ... with a new technique called Perfusion CT. brain tumors. enlarged brain cavities (ventricles) in patients with hydrocephalus . diseases or ... Information and Resources RTAnswers.org Radiation Therapy for Brain Tumors Radiation Therapy for Head and Neck Cancer Others ...

  14. EPL rikkus head ajakirjandustava

    Index Scriptorium Estoniae

    2007-01-01

    Pressinõukogu leidis, et Eesti Päevaleht on rikkunud head ajakirjandustava, avaldades Kai Kalamehe ja Anneli Ammase art. "Reps nõuab trahviga ähvardades haridusministeeriumi ülistamist" 1. veebr. Eesti Päevalehes. Artikkel peab põhinema tõestataval ja tõenditega tagatud faktilisel infol

  15. Computed Tomography (CT) -- Head

    Medline Plus

    Full Text Available ... Español More Info Images/Videos News Physician Resources Professions Site Index A-Z Computed Tomography (CT) - Head ... CT exam to be stressful. The technologist or nurse, under the direction of a physician, may offer ...

  16. Applications of electron lenses: scraping of high-power beams, beam-beam compensation, and nonlinear optics

    CERN Document Server

    Stancari, Giulio

    2014-01-01

    Electron lenses are pulsed, magnetically confined electron beams whose current-density profile is shaped to obtain the desired effect on the circulating beam. Electron lenses were used in the Fermilab Tevatron collider for bunch-by-bunch compensation of long-range beam-beam tune shifts, for removal of uncaptured particles in the abort gap, for preliminary experiments on head-on beam-beam compensation, and for the demonstration of halo scraping with hollow electron beams. Electron lenses for beam-beam compensation are being commissioned in the Relativistic Heavy Ion Collider (RHIC) at Brookhaven National Laboratory (BNL). Hollow electron beam collimation and halo control were studied as an option to complement the collimation system for the upgrades of the Large Hadron Collider (LHC) at CERN; a conceptual design was recently completed. Because of their electric charge and the absence of materials close to the proton beam, electron lenses may also provide an alternative to wires for long-range beam-beam compens...

  17. Mechanical analysis of ceramic head for modular hip prosthesis

    International Nuclear Information System (INIS)

    A study, performed with the department of orthopaedics of the Rome Catholic University, has found out the two possible parameters mainly responsible for head breaking, i. e. errors in conical mating between head and stem, and cracks in the heads. This study has been continued in the frame of the STRIDE-CETMA project, aimed at founding and developing a centre for technologically advanced materials in Brindisi Technology Park (Italy). This report starts a systematic mechanical analysis of the above mentioned head, with the purpose of characterizing it exhaustively. The evaluations made lead to the conclusion that in nomimal conditions, the head is largely overdimensioned, taking into account the maximum load applied to the prosthesis

  18. Computed Tomography (CT) -- Head

    Medline Plus

    Full Text Available ... up in shades of gray, and air appears black. With CT scanning, numerous x-ray beams and ... be removed by the technologist, and the tiny hole made by the needle will be covered with ...

  19. Radiotherapy for head and neck cancer in elderly patients

    International Nuclear Information System (INIS)

    Background and purpose: Elderly patients with head and neck cancer may not be treated aggressively with radiotherapy, due to concerns regarding tolerance of treatment and toxicity. A retrospective study was undertaken of patients aged 80 years and over, treated by definitive radiotherapy for head and neck cancer. Material and methods: 98 patients aged 80-92 received radiotherapy for carcinoma of the head and neck between 1991 and 1995. All patients received beam directed radiotherapy with radical intent using an immobilisation shell. Results: Cancer specific survival was 59% and overall local control was 70% at 5 years. Both were significantly affected by T stage and site of disease. Cancer specific survival was comparable to that of patients aged below 80 years. Seven patients died within 6 months of the treatment. Three patients developed severe late toxicity. Metastatic disease occurred in eight patients. Conclusions: Radiotherapy is a beneficial and well tolerated treatment in elderly patients with carcinoma of the head and neck

  20. Recreation-Related Head Injuries

    Science.gov (United States)

    Recreation-Related Head Injuries American Association of Neurological Surgeons 5550 Meadowbrook Drive, Rolling Meadows, IL 60008-3852  ... and follow instructions on product packaging. Top 15 Recreation/Leisure-Related Head Injuries by Product Product Category ...

  1. Head Lice (Beyond the Basics)

    Science.gov (United States)

    ... The head louse is a tiny, grayish-white insect. Female head lice typically live for about one ... you can use a nonprescription lice treatment (see 'Insecticides' below). Examine family members and close contacts at ...

  2. Cranial Ultrasound/Head Ultrasound

    Science.gov (United States)

    ... is the procedure performed? Head Ultrasound A head ultrasound is performed in the neonatal intensive care unit (NICU) at the infant's bedside. The infant is positioned lying face-up. A clear, water-based gel is applied ...

  3. Beam - cavity interaction beam loading

    International Nuclear Information System (INIS)

    The interaction of a beam with a cavity and a generator in cyclic accelerators or storage rings is investigated. Application of Maxwell's equations together with the nonuniform boundary condition allows one to get an equivalent circuit for a beam-loaded cavity. The general equation for beam loading is obtained on the basis of the equivalent circuit, and the beam admittance is calculated. Formulas for power consumption by a beam-loaded cavity are derived, and the optimal tuning and coupling factor are analyzed. (author)

  4. Clinicopathological correlates of pediatric head and neck cancer

    OpenAIRE

    Sengupta Subhabrata; Pal Ranabir

    2009-01-01

    Background : The spectrum of head and neck tumors in children continues to be the cause of diverse, diagnostically challenging issues. Aims : To demonstrate and compare the unique clinicopathological features in our study population and their correlations with the final histopathological diagnosis. Methods : Fifty-three children with head and neck cancer were examined thoroughly at the Otorhinolaryngology department in a tertiary care teaching hospital followed by histopathological studies...

  5. 3 December 2015 - Finnish Rector, Lapland University of Applied Sciences, M. Lampela, signing an agreement with Engineering Department Head R. Saban an the guest book with HiLumi Project Leader L. Rossi.

    CERN Multimedia

    Bennett, Sophia Elizabeth

    2015-01-01

    Also present from Finland: Principal Lecturer, Mechanical Engineering L. Kantola, Lic.Sc; Senior Lecturer, Information and Communications Technology K. Karlsson;Senior Lecturer, Mechanical Engineering A. Pikkarainen, M.Eng. Also present from CERN: HiLumi Configuration, Quality and Resource Officer I. Bejar Alonso; HiLumi Deputy Project Leader O. Brüning; HiLumi Collaboration B. Di Girolamo; HiLumi Integration and Installation Officer P. Fessia; Engineering Department M. Garlasche.

  6. "Head versus heart"

    Directory of Open Access Journals (Sweden)

    Paul Rozin

    2007-08-01

    Full Text Available Most American respondents give ``irrational,'' magical responses in a variety of situations that exemplify the sympathetic magical laws of similarity and contagion. In most of these cases, respondents are aware that their responses (usually rejections, as of fudge crafted to look like dog feces, or a food touched by a sterilized, dead cockroach are not ``scientifically'' justified, but they are willing to avow them. We interpret this, in some sense, as ``heart over head.'' We report in this study that American adults and undergraduates are substantially less likely to acknowledge magical effects when the judgments involve money (amount willing to pay to avoid an ``unpleasant'' magical contact than they are when using preference or rating measures. We conclude that in ``head-heart'' conflicts of this type, money tips the balance towards the former, or, in other words, that money makes the mind less magical.

  7. Frozen Beams

    CERN Document Server

    Okamoto, Hiromi

    2005-01-01

    In general, the temperature of a charged particle beam traveling in an accelerator is very high. Seen from the rest frame of the beam, individual particles randomly oscillate about the reference orbit at high speed. This internal kinetic energy can, however, be removed by introducing dissipative interactions into the system. As a dissipative process advances, the beam becomes denser in phase space or, in other words, the emittance is more diminished. Ideally, it is possible to reach a "zero-emittance" state where the beam is Coulomb crystallized. The space-charge repulsion of a crystalline beam just balances the external restoring force provided by artificial electromagnetic elements. In this talk, general discussion is made of coasting and bunched crystalline beams circulating in a storage ring. Results of molecular dynamics simulations are presented to demonstrate the dynamic nature of various crystalline states. A possible method to approach such an ultimate state of matter is also discussed.

  8. Sofic one head machines

    OpenAIRE

    Gajardo, Anahi

    2008-01-01

    There are several systems consisting in an object that moves on the plane by following a given rule. It is frequently observed that these systems eventually fall into an unexplained repetitive movement. The general framework of k-dimensional Turing machines with only one head is adopted. A subshift is associated to each Turing machine, and its properties are studied. The subshift consists in the set of sequences of symbols that the machine reads together with the states that it has through ea...

  9. Where are we heading

    International Nuclear Information System (INIS)

    The present paper deals with different aspects connected to the global petroleum industry by discussing the way of heading. The aspects cover themes like new frontiers, new relationships, sanctions, global climate change, new alliances and new technology. New frontiers and relationships concern domestic policy affecting the industry, and sanctions are discussed in connection with trade. The author discusses the industry's participation in the global environmental policy and new alliances to provide greater opportunity for developing new technology

  10. Where are we heading

    Energy Technology Data Exchange (ETDEWEB)

    Noto, L.A. [Mobil Corporation, (United States)

    1996-12-31

    The present paper deals with different aspects connected to the global petroleum industry by discussing the way of heading. The aspects cover themes like new frontiers, new relationships, sanctions, global climate change, new alliances and new technology. New frontiers and relationships concern domestic policy affecting the industry, and sanctions are discussed in connection with trade. The author discusses the industry`s participation in the global environmental policy and new alliances to provide greater opportunity for developing new technology

  11. [Bilateral caudate head infarcts].

    Science.gov (United States)

    Kuriyama, N; Yamamoto, Y; Akiguchi, I; Oiwa, K; Nakajima, K

    1997-11-01

    We reported a 67-year-old woman with bilateral caudate head infarcts. She developed sudden mutism followed by abulia. She was admitted to our hospital 2 months after ictus for further examination. She showed prominent abulia and was inactive, slow and apathetic. Spontaneous activity and speech, immediate response to queries, spontaneous word recall and attention and persistence to complex programs were disturbed. Apparent motor disturbance, gait disturbance, motor aphasia, apraxia and remote memory disturbance were not identified. She seemed to be depressed but not sad. Brain CT and MRI revealed bilateral caudate head hemorrhagic infarcts including bilateral anterior internal capsules, in which the left lesion was more extensive than right one and involved the part of the left putamen. These infarct locations were thought to be supplied by the area around the medial striate artery including Heubner's arteries and the A1 perforator. Digital subtraction angiography showed asymptomatic right internal carotid artery occlusion. She bad had hypertension, diabetes mellitus and atrial fibrillation and also had a left atrium with a large diameter. The infarcts were thought to be caused by cardioembolic occlusion to the distal portion of the left internal carotid artery. Although some variations of vasculature at the anterior communicating artery might contribute to bilateral medial striate artery infarcts, we could not demonstrate such abnormalities by angiography. Bilateral caudate head infarcts involving the anterior internal capsule may cause prominent abulia. The patient did not improve by drug and rehabilitation therapy and died suddenly a year after discharge. PMID:9503974

  12. 14 November 2013 - Director of Indian Institute of Technology Indore P. Mathur with members of the Indian community working at CERN; visiting the LHC tunnel at Point 2, the ALICE experimental area and SM18 with ALICE Collaboration Spokesperson, Istituto Nazionale Fisica Nucleare P. Giubellino and Technology Department, Accelerator Beam Transfer Group Leader V. Mertens

    CERN Multimedia

    Jean-Claude Gadmer

    2013-01-01

    14 November 2013 - Director of Indian Institute of Technology Indore P. Mathur with members of the Indian community working at CERN; visiting the LHC tunnel at Point 2, the ALICE experimental area and SM18 with ALICE Collaboration Spokesperson, Istituto Nazionale Fisica Nucleare P. Giubellino and Technology Department, Accelerator Beam Transfer Group Leader V. Mertens

  13. Beam loading

    CERN Document Server

    Gamp, Alexander

    2013-01-01

    We begin by giving a description of the radio-frequency generator-cavity-beam coupled system in terms of basic quantities. Taking beam loading and cavity detuning into account, expressions for the cavity impedance as seen by the generator and as seen by the beam are derived. Subsequently methods of beam-loading compensation by cavity detuning, radio-frequency feedback and feedforward are described. Examples of digital radio-frequency phase and amplitude control for the special case of superconducting cavities are also given. Finally, a dedicated phase loop for damping synchrotron oscillations is discussed.

  14. Estimating Impacts of Treatment Random Assignment on Classroom Quality in the Head Start Impact Study: The Problem of Missing Data

    Science.gov (United States)

    Friedman-Krauss, Allison H.; Connors, Maia C.; Morris, Pamela A.

    2013-01-01

    As a result of the 1998 reauthorization of Head Start, the Department of Health and Human Services conducted a national evaluation of the Head Start program. The goal of Head Start is to improve the school readiness skills of low-income children in the United States. There is a substantial body of experimental and correlational research that has…

  15. National Head Start Association Position Paper: A Look at Head Start's Health Services and Their Value to Our Nation's Poorest Children.

    Science.gov (United States)

    Smith, Angela; Greene, Sarah; Allen, Ben; Ryan, Joel; Kane, Elizabeth; Shillady, Amy; Hansen, Jacquelyn

    Since its inception, Head Start has used a varied and comprehensive approach to meet the needs of children in poverty. This position paper of the National Head Start Association asserts that the programs current federal-to-local guidance and funding structure under the Department of Health and Human Services is effective and argues that valuable…

  16. Beam Instabilities

    CERN Document Server

    Rumolo, G

    2014-01-01

    When a beam propagates in an accelerator, it interacts with both the external fields and the self-generated electromagnetic fields. If the latter are strong enough, the interplay between them and a perturbation in the beam distribution function can lead to an enhancement of the initial perturbation, resulting in what we call a beam instability. This unstable motion can be controlled with a feedback system, if available, or it grows, causing beam degradation and loss. Beam instabilities in particle accelerators have been studied and analysed in detail since the late 1950s. The subject owes its relevance to the fact that the onset of instabilities usually determines the performance of an accelerator. Understanding and suppressing the underlying sources and mechanisms is therefore the key to overcoming intensity limitations, thereby pushing forward the performance reach of a machine.

  17. Computed Tomography (CT) -- Head

    Medline Plus

    Full Text Available ... ray beam follows a spiral path. A special computer program processes this large volume of data to create two-dimensional cross-sectional images of your body, which are then displayed on a ... by computer software, the result is a very detailed multidimensional ...

  18. Role of Honey in Prevention of Radiation induced Mucositis in Head and Neck Cancer

    International Nuclear Information System (INIS)

    Objective: To determine the efficacy of honey in preventing radiation induced mucositis (RIM) in patients with head and neck cancers. Design: Randomized controlled trial. Setting: Oncology Department of Combined Military Hospital Rawalpindi, from July 2011 to September 2012. Patients and Methods: Sixty patients diagnosed with head and neck cancer requiring radiotherapy to the oropharyngeal mucosa were randomized into two groups to receive either radiation alone or radiation and natural honey. Patients were treated using 6-MV X-ray beams from linear accelerator at a dose rate of 2 Gy per day five times a week up to a dose of 66 Gy. In the treatment group, patients were advised to take 20 ml of pure honey 15 minutes before, 15 minutes after and 6 hours after radiotherapy. Patients were evaluated every week for the development of RIM using the WHO oral mucositis grading system. Results: In treatment group, out of 30 patients, 4(13%) developed grade 3 RIM and none developed grade 4 RIM. In control group, out of 30 patients, 12 (40%) developed grade 3 or 4 RIM (p=0.039). Four patients (13%) in treatment group lost more than 5 Kg weight during the course of radiotherapy compared to 16 patients (53%) in control group (p=0.002). Conclusion: The results of our study have shown that honey is a simple and cost effective treatment to prevent RIM. Large scale randomized trials are needed to confirm the results of our study. (author)

  19. Compensations of beam-beam resonances using crabbing schemes at large Piwinski crossing angles

    International Nuclear Information System (INIS)

    We study combined effects of the crab crossing and of the crab waist lattice options on the luminosity performance of a collider where the crossing angle collisions are used. We have found that for collisions at large Piwinski angle a proper combination of the crab crossing and of the crab waist lattice insertions results in exact cancellation of all synchro-betatron as well as of all betatron coupling beam-beam resonances of odd orders. The beam-beam limitations on the luminosity for such a collider with the crossing angle collisions will be the same like that for a collider with head-on collisions of short bunches.

  20. Design study of a movable mask with low beam impedance

    International Nuclear Information System (INIS)

    A novel design of a movable-mask (collimator) for high current accelerators is proposed. The mask head is supported by a ceramics rod to reduce the interference with beam. One side of the rod is coated by a thin conductive material to avoid charge up of the head. The head is made of graphite or ceramics coated with copper to avoid the direct damage by an intense beam. The impedances of trapped modes, the loss factors and so on were evaluated by simulation codes. The frequencies and the Q factors of the trapped modes were also measured using a cold model, and compared with calculated ones. (author)

  1. Head first C#

    CERN Document Server

    Stellman, Andrew

    2008-01-01

    Head First C# is a complete learning experience for object-oriented programming, C#, and the Visual Studio IDE. Built for your brain, this book covers C# 3.0 and Visual Studio 2008, and teaches everything from language fundamentals to advanced topics including garbage collection, extension methods, and double-buffered animation. You'll also master C#'s hottest and newest syntax, LINQ, for querying SQL databases, .NET collections, and XML documents. By the time you're through, you'll be a proficient C# programmer, designing and coding large-scale applications. Every few chapters you will come

  2. Head first C#

    CERN Document Server

    Stellman, Andrew

    2010-01-01

    You want to learn C# programming, but you're not sure you want to suffer through another tedious technical book. You're in luck: Head First C# introduces this language in a fun, visual way. You'll quickly learn everything from creating your first program to learning sophisticated coding skills with C# 4.0, Visual Studio 2010 and .NET 4, while avoiding common errors that frustrate many students. The second edition offers several hands-on labs along the way to help you build and test programs using skills you've learned up to that point. In the final lab, you'll put everything together. From o

  3. Detector support head

    International Nuclear Information System (INIS)

    The support head of detectors for densitometric measurements of the regional function of lungs using gamma radiation consists of a group of detectors placed in a common rack. The detectors are placed on holders with adjustable height which allow side movement. The holders are slidably connected to the converging quide rail on the frame via arms. Between the holders and the rack is fitted the drive mechanism consisting of a screw. The design allows the stable adjustment of detectors on the lung field during examination and thereby allows the comparison of results of measurements carried out at different times. (J.B.). 2 figs

  4. Head First Web Design

    CERN Document Server

    Watrall, Ethan

    2008-01-01

    Want to know how to make your pages look beautiful, communicate your message effectively, guide visitors through your website with ease, and get everything approved by the accessibility and usability police at the same time? Head First Web Design is your ticket to mastering all of these complex topics, and understanding what's really going on in the world of web design. Whether you're building a personal blog or a corporate website, there's a lot more to web design than div's and CSS selectors, but what do you really need to know? With this book, you'll learn the secrets of designing effecti

  5. Head First Python

    CERN Document Server

    Barry, Paul

    2010-01-01

    Ever wished you could learn Python from a book? Head First Python is a complete learning experience for Python that helps you learn the language through a unique method that goes beyond syntax and how-to manuals, helping you understand how to be a great Python programmer. You'll quickly learn the language's fundamentals, then move onto persistence, exception handling, web development, SQLite, data wrangling, and Google App Engine. You'll also learn how to write mobile apps for Android, all thanks to the power that Python gives you. We think your time is too valuable to waste struggling with

  6. Head First Mobile Web

    CERN Document Server

    Gardner, Lyza; Grigsby, Jason

    2011-01-01

    Despite the huge number of mobile devices and apps in use today, your business still needs a website. You just need it to be mobile. Head First Mobile Web walks you through the process of making a conventional website work on a variety smartphones and tablets. Put your JavaScript, CSS media query, and HTML5 skills to work-then optimize your site to perform its best in the demanding mobile market. Along the way, you'll discover how to adapt your business strategy to target specific devices. Navigate the increasingly complex mobile landscapeTake both technical and strategic approaches to mobile

  7. Reactor vessel head permanent shield

    International Nuclear Information System (INIS)

    A nuclear reactor is described comprising: a nuclear reactor pressure vessel closure head; control rod drive mechanisms (CRDMs) disposed within the closure head so as to project vertically above the closure head; cooling air baffle means surrounding the control rod drive mechanisms for defining cooling air paths relative to the control rod drive mechanisms; means defined within the periphery of the closure head for accommodating fastening means for securing the closure head to its associated pressure vessel; lifting lugs fixedly secured to the closure head for facilitating lifting and lowering movements of the closure head relative to the pressure vessel; lift rods respectively operatively associated with the plurality of lifting lugs for transmitting load forces, developed during the lifting and lowering movements of the closure head, to the lifting lugs; upstanding radiation shield means interposed between the cooling air baffle means and the periphery of the enclosure head of shielding maintenance personnel operatively working upon the closure head fastening means from the effects of radiation which may emanate from the control rod drive mechanisms and the cooling air baffle means; and connecting systems respectively associated with each one of the lifting lugs and each one of the lifting rods for connecting each one of the lifting rods to a respective one of each one of the lifting lugs, and for simultaneously connecting a lower end portion of the upstanding radiation shield means to each one of the respective lifting lugs

  8. Control and monitoring system for internal beam diagnostics facility of SCC

    International Nuclear Information System (INIS)

    The first Ion beam will be accelerated in K-500 Superconducting Cyclotron at VECC soon. The acceleration zone employs Main probe and Beam viewer probe for internal beam diagnostics. The ion beam, during acceleration inside the cyclotron, is needed to be maintained in median plane. The deviation of beam at various radial positions is to be monitored by Main-Probe head. The characteristics of beam e.g. size and shape information is required at the time of beam tuning. A Beam Viewer Probe, made of a borescope fitted with a fluorescent plate is used to display the beam characteristics. High resolution probe head driving systems are developed along with VB GUI to control both the drives and monitor the beam properties (e.g. magnitude, deviation, size, shape). This paper describes the control instrumentation and monitoring scheme for main probe and viewer probe. (author)

  9. ICFA Beam Dynamics Newsletter

    Energy Technology Data Exchange (ETDEWEB)

    Ben-Zvi I.; Kuczewski A.; Altinbas, Z.; Beavis, D.; Belomestnykh,; Dai, J. et al

    2012-07-01

    The Collider-Accelerator Department at Brookhaven National Laboratory is building a high-brightness 500 mA capable Energy Recovery Linac (ERL) as one of its main R&D thrusts towards eRHIC, the polarized electron - hadron collider as an upgrade of the operating RHIC facility. The ERL is in final assembly stages, with injection commisioning starting in October 2012. The objective of this ERL is to serve as a platform for R&D into high current ERL, in particular issues of halo generation and control, Higher-Order Mode (HOM) issues, coherent emissions for the beam and high-brightness, high-power beam generation and preservation. The R&D ERL features a superconducting laser-photocathode RF gun with a high quantum efficiency photoccathode served with a load-lock cathode delivery system, a highly damped 5-cell accelerating cavity, a highly flexible single-pass loop and a comprehensive system of beam instrumentation. In this ICFA Beam Dynamics Newsletter article we will describe the ERL in a degree of detail that is not usually found in regular publications. We will discuss the various systems of the ERL, following the electrons from the photocathode to the beam dump, cover the control system, machine protection etc and summarize with the status of the ERL systems.

  10. Sam Easterling to lead civil and environmental engineering department

    OpenAIRE

    Nystrom, Lynn A.

    2009-01-01

    W. Samuel Easterling, the Montague-Betts Professor of Structural Steel Design in Virginia Tech's Charles E. Via Jr. Department of Civil and Environmental Engineering, will become the department head effective Aug. 10, 2009.

  11. Computed Tomography (CT) -- Head

    Medline Plus

    Full Text Available ... detailed images of many types of tissue as well as the lungs, bones, and blood vessels. CT ... iodine is extremely rare, and radiology departments are well-equipped to deal with them. Because children are ...

  12. Eye-based head gestures

    DEFF Research Database (Denmark)

    Mardanbegi, Diako; Witzner Hansen, Dan; Pederson, Thomas

    A novel method for video-based head gesture recognition using eye information by an eye tracker has been proposed. The method uses a combination of gaze and eye movement to infer head gestures. Compared to other gesture-based methods a major advantage of the method is that the user keeps the gaze...... on the interaction object while interacting. This method has been implemented on a head-mounted eye tracker for detecting a set of predefined head gestures. The accuracy of the gesture classifier is evaluated and verified for gaze-based interaction in applications intended for both large public...

  13. Molecular beams

    International Nuclear Information System (INIS)

    This book is a timeless and rather complete theoretical and experimental treatment of electric and magnetic resonance molecular-beam experiments for studying the radio frequency spectra of atoms and molecules. The theory of interactions of the nucleus with atomic and molecular fields is extensively presented. Measurements of atomic and nuclear magnetic moments, electric multipole moments, and atomic fine and hyperfine structure are detailed. Useful but somewhat outdated chapters on gas kinetics, molecular beam design, and experimental techniques are also included

  14. Controlling the thermally induced focal shift in laser processing heads

    Science.gov (United States)

    Negel, Jan-Philipp; Abt, Felix; Blázquez-Sánchez, David; Austerschulte, Armin; Hafner, Margit; Liebig, Thomas; von Strobl-Albeg, Philipp; Weber, Rudolf; Abdou Ahmed, Marwan; Voss, Andreas; Graf, Thomas

    2012-03-01

    A system being able to in situ measure and control not simply the distance between the workpiece and the focusing optics, but the true focal position on the workpiece including the thermally induced focal shift in a laser processing head is presented. In order to achieve this, a bundle of astigmatic measurement beams is used following the same optical path as the welding beam. A camera and a software algorithm allow to keep the focal position constant within a range of 4 mm and with a resolution between 150 μm and 500 μm.

  15. Head to cloaca and head-only stunning of poultry

    OpenAIRE

    Lambooij, E.; Workel, L.D.; Reimert, H.G.M.; Hindle, V.A.

    2010-01-01

    The alternative stunning methods head cloaca and head only are examined for inducing unconsciousness and affect on meat quality. When both methods are applied they induce unconsciousness without compromising the meat quality. It is recommended to develop the equipment for practical application and to implement the methods in commercial slaughterhouses.

  16. Effect of Head and Tongue Posture on the Pharyngeal Airway Dimensions and Morphology in Three-Dimensional Imaging

    DEFF Research Database (Denmark)

    Gurani, Sirwan Fernandez; Di Carlo, Gabriele; Cattaneo, Paolo M;

    2016-01-01

    OBJECTIVES: Natural head position is recommended to be optimal at cone-beam computed tomography acquisition. For standardization purposes in control of treatment outcome, it is clinically relevant to discuss, if a change of posture from natural head position may have an effect on the pharyngeal...

  17. NASA head sworn in

    Science.gov (United States)

    James C. Fletcher was sworn in on May 12, 1986, as administrator of the National Aeronautics and Space Administration (NASA). At a news conference after he was sworn in, Fletcher said that NASA would deal with both its technical problems and its procedural problems before the shuttle will fly again. According to press accounts, he stressed that funds should be made available to replace the Challenger orbiter, which was lost in an explosion on January 28.Fletcher, who had also headed the agency from 1971 to 1977, succeeds James M. Beggs, who was indicted in December 1985 for conspiring to defraud the federal government while serving as a senior executive at the General Dynamics Corporation.

  18. Chryse 'Alien Head'

    Science.gov (United States)

    2005-01-01

    26 January 2004 This Mars Global Surveyor (MGS) Mars Orbiter Camera (MOC) image shows an impact crater in Chryse Planitia, not too far from the Viking 1 lander site, that to seems to resemble a bug-eyed head. The two odd depressions at the north end of the crater (the 'eyes') may have formed by wind or water erosion. This region has been modified by both processes, with water action occurring in the distant past via floods that poured across western Chryse Planitia from Maja Valles, and wind action common occurrence in more recent history. This crater is located near 22.5oN, 47.9oW. The 150 meter scale bar is about 164 yards long. Sunlight illuminates the scene from the left/lower left.

  19. 应用锥形束CT评价最终等中心标记法定位头颈部肿瘤的摆位误差%Evaluation of setup errors for head-and-neck cancer localized with final isocenter marking method via cone beam CT

    Institute of Scientific and Technical Information of China (English)

    吴钦宏; 李高峰; 李雪南; 刘春玲; 朱宝全; 田丽红; 张清文; 竺萌; 秋晞; 王婵

    2012-01-01

    Objective To evaluate the setup errors of image guided radiation therapy (IGRT) for head-and-neck cancer using kilovoltage cone beam CT( kV CBCT).Methods 256 patients with head-and-neck cancer were treated with intensity modulated radiation therapy (IMRT) from March 2009 to October 2011.All patients were immobilized with head-and-neck mask and localized with final isocenter marking method using the Philips PQS CT or Philips Brilliance CT Big Bore scanners,which were equipped with LAP movable laser systems.The CT images were transferred to a Varian Eclipse V8.6 workstation for contouring and planning.A kV cone-beam CT scans was acquired,and registered before the treatment for every patient on a Varian iX linear accelerator via OBI system.The setup errors in the right-left ( RL),superior-inferior (SI),and anterior-posterior (AP) directions were recorded.Results The setup errors for the 473 datasets followed a Gaussian distribution.The systematic errors ± random errors in the RL,SI and AP were(-0.6 ± 1.3 ),(0.5 ± 1.6) and (0.9 ± 1.7 ) mm,respectively.The planning target volume (PTV) margins were calculated respectively as 2.4,2.4 and 3.4 mm according to the formula of M =2.5∑ +0.7δ The margins of 288 sets of data using the Big Bore CT scanner were calculated as 2.0,2.1 and 1.7 mm,respectively.Conclusions The setup errors using final isocenter marking method are smaller than those using reference point marking method.The result derived from this retrospective study could be used to set the margin between CTV and PTV.%目的 应用千伏级锥形束CT(kV CBCT)评价头颈部肿瘤图像引导放疗的摆位误差.方法 选取2009年3月至2011年10月的256例行调强放疗的头颈部肿瘤患者,采用头颈肩面罩固定体位,最终等中心标记法定位,配有LAP可移动式激光定位系统的Philips PQS CT或PhilipsBrilliance CT Big Bore进行CT扫描.CT图像通过网络传输给Varian Eclipse治疗计划系统,用来进行勾画靶区和设

  20. Standard beam PWC for Fermilab

    International Nuclear Information System (INIS)

    As one of its projects the Fermilab Experimental Areas Department has been designed and tested a relatively small proportional wire chamber for use in the secondary beam lines. It is intended to supplement the variety of detectors known in the vernacular as SWICS that are used to obtain profiles for beam tuning. The new detector, described in this report, operates in the limited proportional mode and allows experimenters to use a standard, lab supported device for associating trajectories of individual beam particles with events triggering their own experiment's apparatus. A completed triple plane module is shown

  1. ILC Beam Energy Measurement by means of Laser Compton Backscattering

    OpenAIRE

    Muchnoi, N.; Schreiber, H. J.; Viti, M

    2008-01-01

    A novel, non-invasive method of measuring the beam energy at the International Linear Collider is proposed. Laser light collides head-on with beam particles and either the energy of the Compton scattered electrons near the kinematic end-point is measured or the positions of the Compton backscattered $\\gamma$-rays, the edge electrons and the unscattered beam particles are recorded. A compact layout for the Compton spectrometer is suggested. It consists of a bending magnet and position sensitiv...

  2. Drift compression of an intense neutralized ion beam

    Energy Technology Data Exchange (ETDEWEB)

    Roy, P.K.; Yu, S.S.; Henestroza, E.; Anders, A.; Bieniosek, F.M.; Coleman, J.; Eylon, S.; Greenway, W.G.; Leitner, M.; Logan, B.G.; Waldron, W.L.; Welch, D.R.; Thoma, C.; Sefkow, A.B.; Gilson, E.P.; Efthimion, P.C.; Davidson, R.C.

    2004-10-25

    Longitudinal compression of a tailored-velocity, intense neutralized ion beam has been demonstrated. The compression takes place in a 1-2 m drift section filled with plasma to provide space-charge neutralization. An induction cell produces a head-to-tail velocity ramp that longitudinally compresses the neutralized beam, enhancing the beam peak current by a factor of 50 and producing a pulse duration of about 3 ns. this measurement has been confirmed independently with two different diagnostic systems.

  3. Head and neck malignancies in younger patients

    International Nuclear Information System (INIS)

    We treated 23 (1.4% of all our primary cases) younger patients who are from 15 years old to 29 years old with head and neck malignancies at the Department of Head and Neck Surgery of the Miyagi Cancer Center Hospital for the past 12 years. There were 12 male and 11 female, and the sex ratio was approximately 1:1. There were 12 oral cancer patients, 6 epipharyngeal cancer patients and so on. There were 14 squamous cell carcinomas, 3 nasopharyngeal carcinomas and so on. 60% of all cases were squamous cell carcinomas. Clinically, advanced stage (stage III and IV) was diagnosed in 70% of patients at presentation. Although 19 patients had no past history, 2 patients had bronchial asthma, one had schizophrenia, and one had psychological disorder. Radical treatment was performed in 20 of 23 examples. The estimated Kaplan-Meier 5-year cause-specific survival rates for all patients were 76% and the 10-year cause-specific survival rates were 63%, respectively. It was thought that survival consequence was excellent in the whole. The problems of head and neck tumor treatment in a younger patient were thought about with late effect by radioactive rays and genital disorder by cancer chemotherapy. (author)

  4. Beam emittance and beam disruption

    International Nuclear Information System (INIS)

    Beam disruption during the collision of intense relativistic bunches has been studied by R. Hollebeek. In the case of oppositely charged bunches, focussing effects occur causing a decrease in the effective bunch cross section, and thereby an increase of luminosity by an enhancement factor H. The term disruption derives from the fact that the beam emittance changes markedly during the collision. 1 ref., 1 fig., 1 tab

  5. Simulations of longitudinal beam dynamics of space-charge dominated beams for heavy ion fusion

    International Nuclear Information System (INIS)

    The longitudinal instability has potentially disastrous effects on the ion beams used for heavy ion driven inertial confinement fusion. This instability is a open-quotes resistive wallclose quotes instability with the impedance coining from the induction modules in the accelerator used as a driver. This instability can greatly amplify perturbations launched from the beam head and can prevent focusing of the beam onto the small spot necessary for fusion. This instability has been studied using the WARPrz particle-in-cell code. WARPrz is a 2 1/2 dimensional electrostatic axisymmetric code. This code includes a model for the impedance of the induction modules. Simulations with resistances similar to that expected in a driver show moderate amounts of growth from the instability as a perturbation travels from beam head to tail as predicted by cold beam fluid theory. The perturbation reflects off the beam tail and decays as it travels toward the beam head. Nonlinear effects cause the perturbation to steepen during reflection. Including the capacitive component of the, module impedance. has a partially stabilizing effect on the longitudinal instability. This reduction in the growth rate is seen in both cold beam fluid theory and in simulations with WARPrz. Instability growth rates for warm beams measured from WARPrz are lower than cold beam fluid theory predicts. Longitudinal thermal spread cannot account for this decrease in the growth rate. A mechanism for coupling the transverse thermal spread to decay of the longitudinal waves is presented. The longitudinal instability is no longer a threat to the heavy ion fusion program. The simulations in this thesis have shown that the growth rate for this instability will not be as large as earlier calculations predicted

  6. Accidental and Nonaccidental Head Injuries in Infants: Distinguishing Characteristics

    Directory of Open Access Journals (Sweden)

    J Gordon Millichap

    2005-07-01

    Full Text Available One hundred fifty infants hospitalized with head injury over a 3-year period, 57 (38% due to child abuse, were studied prospectively at the Departments of Pediatric Neurosurgery, Neuro-ophthalmology, and Legal Medicine, CHRU de Lille, France.

  7. Magnetic Resonance Imaging (MRI) -- Head

    Medline Plus

    Full Text Available ... bear denotes child-specific content. Related Articles and Media MR Angiography (MRA) Magnetic Resonance, Functional (fMRI) - Brain Head and Neck Cancer Treatment Brain Tumor Treatment Magnetic Resonance Imaging (MRI) Safety Alzheimer's Disease Head Injury Brain Tumors Images related to Magnetic ...

  8. Magnetic Resonance Imaging (MRI) -- Head

    Medline Plus

    Full Text Available Toggle navigation Test/Treatment Patient Type Screening/Wellness Disease/Condition Safety En Español More Info Images/Videos News Physician Resources Professions Site Index A-Z Magnetic Resonance Imaging (MRI) - Head Magnetic resonance imaging (MRI) of the head uses a ...

  9. Magnetic Resonance Imaging (MRI) -- Head

    Medline Plus

    Full Text Available ... Resources Professions Site Index A-Z Magnetic Resonance Imaging (MRI) - Head Magnetic resonance imaging (MRI) of the head uses a powerful magnetic ... that are clearer and more detailed than other imaging methods. This exam does not use ionizing radiation ...

  10. 49 CFR 572.112 - Head assembly.

    Science.gov (United States)

    2010-10-01

    ... 49 Transportation 7 2010-10-01 2010-10-01 false Head assembly. 572.112 Section 572.112... 50th Percentile Male § 572.112 Head assembly. The head assembly consists of the head (drawing 78051-61X...) accelerometers that are mounted in conformance to § 572.36 (c). (a) Test procedure. (1) Soak the head assembly...

  11. Computed Tomography (CT) -- Head

    Medline Plus

    Full Text Available ... materials that contain iodine is extremely rare, and radiology departments are well-equipped to deal with them. Because children are more sensitive to radiation, they should have a CT exam only if it is essential for making a diagnosis and should not have repeated CT exams unless ...

  12. Turbidity Current Head Mixing

    Science.gov (United States)

    Hernandez, David; Sanchez, Miguel Angel; Medina, Pablo

    2010-05-01

    A laboratory experimental set - up for studying the behaviour of sediment in presence of a turbulent field with zero mean flow is compared with the behaviour of turbidity currents [1] . Particular interest is shown on the initiation of sediment motion and in the sediment lift - off. The behaviour of the turbidity current in a flat ground is compared with the zero mean flow oscilating grid generated turbulence as when wave flow lifts off suspended sediments [2,3]. Some examples of the results obtained with this set-up relating the height of the head of the turbidity current to the equilibrium level of stirred lutoclines are shown. A turbulent velocity u' lower than that estimated by the Shield diagram is required to start sediment motion. The minimum u' required to start sediment lift - off, is a function of sediment size, cohesivity and resting time. The lutocline height depends on u', and the vorticity at the lutocline seems constant for a fixed sediment size [1,3]. Combining grid stirring and turbidty current head shapes analyzed by means of advanced image analysis, sediment vertical fluxes and settling speeds can be measured [4,5]. [1] D. Hernandez Turbulent structure of turbidity currents and sediment transport Ms Thesis ETSECCPB, UPC. Barcelona 2009. [2] A. Sánchez-Arcilla; A. Rodríguez; J.C. Santás; J.M. Redondo; V. Gracia; R. K'Osyan; S. Kuznetsov; C. Mösso. Delta'96 Surf-zone and nearshore measurements at the Ebro Delta. A: International Conference on Coastal Research through large Scale Experiments (Coastal Dynamics '97). University of Plymouth, 1997, p. 186-187. [3] P. Medina, M. A. Sánchez and J. M. Redondo. Grid stirred turbulence: applications to the initiation of sediment motion and lift-off studies Physics and Chemistry of the Earth, Part B: Hydrology, Oceans and Atmosphere. 26, Issue 4, 2001, Pages 299-304 [4] M.O. Bezerra, M. Diez, C. Medeiros, A. Rodriguez, E. Bahia., A. Sanchez-Arcilla and J.M. Redondo. Study on the influence of waves on

  13. Locations of hydraulic-head observations (HOBS) for the Central Valley Hydrologic Model (CVHM)

    Data.gov (United States)

    U.S. Geological Survey, Department of the Interior — This digital dataset defines the well locations for hydraulic-head observations used in the calibration of the transient hydrologic model of the Central Valley flow...

  14. Location of General Head Boundaries (GHB) in the Central Valley Hydrologic Model (CVHM)

    Data.gov (United States)

    U.S. Geological Survey, Department of the Interior — This digital dataset represents the area where lateral flow into and out of the Central Valley groundwater-flow system occurs. The General Head Boundary (GHB) is...

  15. Geology and geomorphology--Offshore of Bodega Head Map Area, California

    Data.gov (United States)

    U.S. Geological Survey, Department of the Interior — This part of DS 781 presents data for the geologic and geomorphic map of the Offshore of Bodega Head map area, California. The vector data file is included in...

  16. Head Scarp Boundary for the Landslides in the Little North Santiam River Basin, Oregon

    Data.gov (United States)

    U.S. Geological Survey, Department of the Interior — Polygons represent head scarps and flank scarps associated with landslide deposits in the Little North Santiam River Basin, Oregon. This work was completed as part...

  17. Electronics Department progress report 1984

    International Nuclear Information System (INIS)

    This report summarizes the activities in the Electronics Department in 1984. These include work under the headings of informatics, applied laser physics, nuclear geophysics, instrumentation and measuring techniques, and instrumentation consulting, registration and maintenance for the Danish Research Council and Risoe National Laboratory. (author)

  18. Electronics Department progress report 1983

    International Nuclear Information System (INIS)

    this report summarizes the Electronics Department's activities in 1983. These include work under the headings of man-machine system and operator studies, reliability techniques, application of nuclear techniques to mineral exploration, applied laser physics, computing and, lastly, research instrumentation. (author)

  19. Visual head motion monitoring

    OpenAIRE

    Sieber, Lukáš

    2012-01-01

    Bakalářská práce se zabývá určením polohy a natočení hlavy v reálném čase ze snímků pořízených webovou kamerou vůči pevným ramenům. Dále poukazuje na výhody využití Open CV. Zahrnut je též podrobnější popis užitých funkcí Open CV, jako například optický tok, hledání korespondujících dvojic 3D-2D bodů a mimo jiné také operace s rotační maticí. V závěru jsou zhodnoceny dosažené výsledky a navržen další možný postup. This bachelor thesis is based on finding of head rotation and position again...

  20. Abusive Head Trauma (Shaken Baby Syndrome)

    Science.gov (United States)

    ... Things to Know About Zika & Pregnancy Abusive Head Trauma (Shaken Baby Syndrome) KidsHealth > For Parents > Abusive Head ... babies tend to cry the most. How These Injuries Happen Abusive head trauma results from injuries caused ...

  1. Heads Up: Concussion in Youth Sports

    Medline Plus

    Full Text Available ... Up! Prevent Concussions Prevent Head Injuries Sports Safety Students Play Safe Youth Sports Safety PROMOTIONAL MATERIALS "Heads ... Up! Prevent Concussions Prevent Head Injuries Sports Safety Students Play Safe Youth Sports Safety ORDER FREE PRINT ...

  2. Heads Up to High School Sports

    Science.gov (United States)

    ... What's this? Submit What's this? Submit Button HEADS UP to School Sports Recommend on Facebook Tweet Share ... Submit What's this? Submit Button Connect with HEADS UP & CDC's Injury Center HEADS UP Resources File Formats ...

  3. Return of the talking heads

    DEFF Research Database (Denmark)

    Reinecke Hansen, Kenneth; Bro, Peter; Andersson, Ralf

    2016-01-01

    . In order to analyze the latest development entering the third wave, we propose a theoretically based dramaturgical model for the television news item. The analysis concludes that, with the current ‘return’ of the talking heads format, the pre-produced and pre-packaged bulletin program about past events......The present article suggests that the brief history of Western television news dramaturgy can be expounded as three major waves: from the early days of the talking heads in the studio, over the narrativization of the field report to a (re-)current studio- and field-based talking heads format...

  4. Acute arterial infarcts in patients with severe head injuries

    Directory of Open Access Journals (Sweden)

    Deepak Agrawal

    2012-01-01

    Full Text Available Aims and Objectives: To study the incidence, demographic profile, and outcome of patients with severe closed head injuries who develop acute arterial infarcts. Materials and Methods: Patients with severe head injury (Glasgow coma score (GCS ≤8 presenting within 8 h of injury in the Department of Neurosurgery over a period of 5 months were enrolled in the study. Patients with penetrating head injury, infarct due to herniation and iatrogenic arterial injuries were excluded from the study. Only arterial infarcts developing within 8 h of injury were included in the study. A computed tomography (CT head was done on all patients within 8 h of injury and repeated if necessary. Arterial infarct was defined as well-demarcated wedge-shaped hypodensity corresponding to an arterial territory on plain CT of the head. Outcome was assessed using Glasgow outcome score (GOS at 1 month post-injury or at death (whichever came earlier. Results: Forty-four patients of severe head injury were included in the study during the above period. Of these, four patients (9.1% had arterial infarcts on the initial CT scan. The male:female ratio was 1:3. The mean age was 54 years (range 3-85 years. Two patients had infarcts in the middle cerebral artery distribution and two in the superior cerebellar artery distribution. Poor outcome (GOS 1-3 was seen in 100% of the patients with arterial infarct compared to 52.5% (n=21 in patients with severe head injury without arterial infarct. Conclusions: A significant percentage of patients with severe head injury have arterial infarcts on admission, which may imply arterial injury. Our study shows that these patients have a poorer prognosis vis-a-vis patient without these findings.

  5. Low-cost full-field microinterferometer heads produced by hot- embossing technology

    Science.gov (United States)

    Kujawinska, M.; Krezel, J.; Krajewski, R.

    2010-08-01

    The paper presents concept, summary of numerical modeling and technology chain proposition for fabrication of measurement heads of integrated grating interferometer and interferometric tomograph. In both cases, the measurement head is a monolithic PMMA cuboidal block with diffraction grating integrated. The structures replace a set of bulk optical elements used in classical interferometric setups. Fabrication of the measurement heads by replication is the crucial aspect of significant reduction of proposed system manufacturing. Numerical treatment performed in geometrical and scalar-wave regime, covers investigation of external as well as internal properties of the measurement heads. Modeling was also the basis for determination of acceptable measurement head replicas quality providing beam propagation proper for both considered interferometric techniques. The technology chain proposed in the paper covers master fabrication and its replication steps leading to fabrication of truly low-cost measurement devices.

  6. Magnetic Resonance Imaging (MRI) -- Head

    Medline Plus

    Full Text Available ... medically necessary. MRI may not always distinguish between cancer tissue and fluid, known as edema . MRI typically ... Brain Tumors Radiation Therapy for Head and Neck Cancer Others : American Stroke Association National Stroke Association top ...

  7. Magnetic Resonance Imaging (MRI) -- Head

    Medline Plus

    Full Text Available ... a computer to produce detailed pictures of the brain and other cranial structures that are clearer and ... sensitive imaging test of the head (particularly the brain) in routine clinical practice. top of page What ...

  8. Magnetic Resonance Imaging (MRI) -- Head

    Medline Plus

    Full Text Available ... practice. top of page What are some common uses of the procedure? MR imaging of the head ... gadolinium contrast, it may still be possible to use it after appropriate pre-medication. Patient consent will ...

  9. Magnetic Resonance Imaging (MRI) -- Head

    Medline Plus

    Full Text Available ... imaging of the head is performed for a number of abrupt onset or long-standing symptoms. It ... women should not have this exam in the first trimester of pregnancy unless the potential benefit from ...

  10. Magnetic Resonance Imaging (MRI) -- Head

    Medline Plus

    Full Text Available ... page What does the equipment look like? The traditional MRI unit is a large cylinder-shaped tube ... page Additional Information and Resources RTAnswers.org : Radiation Therapy for Brain Tumors Radiation Therapy for Head and ...

  11. Magnetic Resonance Imaging (MRI) -- Head

    Medline Plus

    Full Text Available ... or cause problems during an MRI exam. Nephrogenic systemic fibrosis is currently a recognized, but rare, complication ... Tumor Treatment Magnetic Resonance Imaging (MRI) Safety Alzheimer's Disease Head Injury Brain Tumors Images related to Magnetic ...

  12. Head and neck cancer imaging

    Energy Technology Data Exchange (ETDEWEB)

    Hermans, R. (ed.) [University Hospitals, Leuven (Belgium). Dept. of Radiology

    2006-07-01

    This book provides a comprehensive review of state-of-the-art imaging in head and neck cancer. Precise determination of tumor extent is of the utmost importance in these neoplasms, as it has important consequences for staging of disease, prediction of outcome and choice of treatment. Only the radiologist can fully appreciate submucosal, perineural, and perivascular tumor spread and detect metastatic disease at an early stage. Imaging is also of considerable benefit for patient surveillance after treatment. All imaging modalities currently used in the management of head and neck neoplasms are considered in depth, and in addition newer techniques such as PET-CT and diffusion-weighted MRI are discussed. This book will help the reader to recommend, execute and report head and neck imaging studies at a high level of sophistication and thereby to become a respected member of the team managing head and neck cancer. (orig.)

  13. Magnetic Resonance Imaging (MRI) -- Head

    Medline Plus

    Full Text Available ... the same effect. A very irregular heartbeat may affect the quality of images obtained using techniques that ... Tumor Treatment Magnetic Resonance Imaging (MRI) Safety Alzheimer's Disease Head Injury Brain Tumors Images related to Magnetic ...

  14. Magnetic Resonance Imaging (MRI) -- Head

    Medline Plus

    Full Text Available ... MRI scanners are air-conditioned and well-lit. Music may be played through the headphones to help ... page Additional Information and Resources RTAnswers.org : Radiation Therapy for Brain Tumors Radiation Therapy for Head and ...

  15. Magnetic Resonance Imaging (MRI) -- Head

    Medline Plus

    Full Text Available ... Magnetic resonance imaging (MRI) is a noninvasive medical test that physicians use to diagnose and treat medical ... CD. Currently, MRI is the most sensitive imaging test of the head (particularly the brain) in routine ...

  16. New Russian science head named

    CERN Multimedia

    Levitin, C

    2000-01-01

    Ilya Klebanov, a deputy prime minister, has been appointed the country's new head of industrial and scientific policy. He will control the new Ministry for Industry, Science and Technologies (4 paragraphs).

  17. Magnetic Resonance Imaging (MRI) -- Head

    Medline Plus

    Full Text Available ... of the head (particularly the brain) in routine clinical practice. top of page What are some common ... acutely injured; however, this decision is based on clinical judgment. This is because traction devices and many ...

  18. Magnetic Resonance Imaging (MRI) -- Head

    Medline Plus

    Full Text Available ... is not harmful, but it may cause some medical devices to malfunction. Most orthopedic implants pose no ... Head? Magnetic resonance imaging (MRI) is a noninvasive medical test that physicians use to diagnose and treat ...

  19. Magnetic Resonance Imaging (MRI) -- Head

    Medline Plus

    Full Text Available ... and a computer to produce detailed pictures of the brain and other cranial structures that are clearer and ... most sensitive imaging test of the head (particularly the brain) in routine clinical practice. top of page What ...

  20. Magnetic Resonance Imaging (MRI) -- Head

    Medline Plus

    Full Text Available ... in patients with very poor kidney function. Careful assessment of kidney function before considering a contrast injection ... the limitations of MRI of the Head? High-quality images are assured only if you are able ...

  1. Magnetic Resonance Imaging (MRI) -- Head

    Medline Plus

    Full Text Available ... during MRI, but this is rarely a problem. Tooth fillings and braces usually are not affected by ... Magnetic Resonance Imaging (MRI) Safety Alzheimer's Disease Head Injury Brain Tumors Images related to Magnetic Resonance Imaging ( ...

  2. Magnetic Resonance Imaging (MRI) -- Head

    Medline Plus

    Full Text Available ... of the head uses a powerful magnetic field, radio waves and a computer to produce detailed pictures ... medical conditions. MRI uses a powerful magnetic field, radio frequency pulses and a computer to produce detailed ...

  3. Magnetic Resonance Imaging (MRI) -- Head

    Medline Plus

    Full Text Available ... News Physician Resources Professions Site Index A-Z Magnetic Resonance Imaging (MRI) - Head Magnetic resonance imaging (MRI) ... conditions such as: brain tumors stroke infections developmental anomalies hydrocephalus — dilatation of fluid spaces within the brain ( ...

  4. Tensile Tests of Round-head, Flat-head, and Brazier-head Rivets

    Science.gov (United States)

    Schuette, Evan H; Bartone, Leonard M; Mandel, Merven W

    1944-01-01

    An investigation was conducted to determine the tensile strength of round-head (AN43C), flat-head(AN442), and brazier-head (AN4556) aluminum-alloy rivets because of the scarcity of information on the tensile strength of rivets. The results of the investigation are presented as curves that show the variation of the ratio of the tensile strength of the rivet to the tensile strength of the rivet crank with the ratio of the sheet thickness to the rivet diameter for the different types of rivet.

  5. Dropped head syndrome in mitochondriopathy

    OpenAIRE

    Finsterer, J

    2004-01-01

    In a 63-year-old, 165-cm-tall woman with a history of repeated tick bites, dilative cardiomyopathy, osteoporosis, progressive head ptosis with neck stiffness and cervical pain developed. The family history was positive for thyroid dysfunction and neuromuscular disorders. Neurological examination revealed prominent forward head drop, weak anteflexion and retroflexion, nuchal rigidity, weakness of the shoulder girdle, cogwheel rigidity, and tetraspasticity. The lactate stress test was abnormal....

  6. Serious head injury in sport.

    OpenAIRE

    Lindsay, K W; McLatchie, G; Jennett, B

    1980-01-01

    Of 1900 head injuries serious enough to be admitted to the neurosurgical unit in Glasgow over a five year period, 52 (2.7%) were due to "sport." Golf, horse-riding, and Association football were the sports most commonly linked with serious head injury. Golfing injuries were all compound depressed fractures, and all these patients made a good recovery; horse-riding produced more severe injuries, three of the eight patients being left with residual disability. Much attention has been directed t...

  7. Analytical modelling of soccer heading

    Indian Academy of Sciences (India)

    Zahari Taha; Mohd Hasnun Arif Hassan; Iskandar Hasanuddin

    2015-08-01

    Heading occur frequently in soccer games and studies have shown that repetitive heading of the soccer ball could result in degeneration of brain cells and lead to mild traumatic brain injury. This study proposes a two degree-of-freedom linear mathematical model to study the impact of the soccer ball on the brain. The model consists of a mass–spring–damper system, in which the skull, the brain and the soccer ball are modelled as a mass and the neck modelled as a spring–damper system. The proposed model was compared with previous dynamic model for soccer ball-to-head impact. Moreover, it was also validated against drop ball experiment on an instrumented dummy skull and also compared with head acceleration data from previous studies. Comparison shows that our proposed model is capable of describing both the skull and brain accelerations qualitatively and quantitatively. This study shows that a simple linear mathematical model can be useful in giving a preliminary insight on the kinematics of human skull and brain during a ball-to-head impact. The model can be used to investigate the important parameters during soccer heading that affect the brain displacement and acceleration, thus providing better understanding of the mechanics behind it.

  8. PH Department: at the heart of CERN

    CERN Multimedia

    Antonella Del Rosso

    2014-01-01

    The Physics Department is where the Laboratory’s scientific activity takes place. Some 1000 members of the personnel and 11,000 users work together on CERN’s highly diversified experimental programme. The challenges for the coming years are twofold: maintain the level of excellence that led the Laboratory to the discovery of the Higgs boson, and preserve the diversity of the scientific programme. The new Department Head discusses his vision with us.   Livio Mapelli. “On paper, our plan for the next two years shows no surprises,” says Livio Mapelli, former Deputy Department Head and now, since January, Head of the Physics Department (PH). “We have to finish the completion, consolidation and initial upgrades of the experiments planned for LS1. In 2015, our core activity will be supporting the experiments during the restart of the accelerator complex. However, as physicists, the best reward for us would be to obtain new breakthroughs and importa...

  9. Beam transport

    International Nuclear Information System (INIS)

    The beam diagnostic components for both the transfer and the high-energy beamlines perform well except for some of the scanners whose noise pick-up has become a problem, especially at low beam intensities. This noise pick-up is primarily due to deterioration of the bearings in the scanner. At some locations in the high-energy beamlines, scanners were replaced by harps as the scanners proved to be practically useless for the low-intensity beams required in the experimental areas. The slits in the low-energy beamline, which are not water-cooled, have to be repaired at regular intervals because of vacuum leaks. Overheating causes the ceramic feedthroughs to deteriorate resulting in the vacuum leaks. Water-cooled slits have been ordered to replace the existing slits which will later be used in the beamlines associated with the second injector cyclotron SPC2. The current-measurement system will be slightly modified and should then be much more reliable. 3 figs

  10. External Beam Therapy (EBT)

    Science.gov (United States)

    ... Physician Resources Professions Site Index A-Z External Beam Therapy (EBT) External beam therapy (EBT) is a ... follow-up should I expect? What is external beam therapy and how is it used? External beam ...

  11. Stability Issues of the Mu2e Proton Beam

    Energy Technology Data Exchange (ETDEWEB)

    Ng, K.Y.; /Fermilab

    2009-05-01

    Stability issues of the mu2e proton beam are discussed. These include space-charge distortion of bunch shape, microwave instabilities, mode-coupling instabilities, head-tail instabilities, as well as electron-cloud effects. We have studied several beam stability issues of the proton beam heading to the target for the mu2e experiment. We find bunch-shape distortions driven by the space charge force is reasonably small, and longitudinal microwave instability will unlikely to occur. Electron-cloud buildup, with density up to {rho}{sub e} {approx} 2 x 10{sup 12} m{sup -3} in the Accumulator, can probably drive head-tail instabilities. However, these, together with the instabilities driven by the resistive-wall impedance can be avoided by restricting the chromaticity to larger than {approx} 0.2. TMCI will not occur even when the electron-cloud wake is included.

  12. Heads Up: Concussion in Youth Sports

    Medline Plus

    Full Text Available ... Health eCard Heads Up! Prevent Concussions Prevent Head Injuries Sports Safety Students Play Safe Youth Sports Safety PROMOTIONAL ... Health eCard Heads Up! Prevent Concussions Prevent Head Injuries Sports Safety Students Play Safe Youth Sports Safety ORDER ...

  13. Heads Up: Concussion in Youth Sports

    Medline Plus

    Full Text Available ... and parents “Heads Up” for school nurses, parents, teachers, counselors, and other school professionals “Heads Up” for ... Up! Prevent Concussions Prevent Head Injuries Sports Safety Students Play Safe Youth Sports Safety PROMOTIONAL MATERIALS "Heads ...

  14. 49 CFR 572.182 - Head assembly.

    Science.gov (United States)

    2010-10-01

    .... The head shall be tested per procedure specified in 49 CFR § 572.112(a). (c) Performance criteria. (1... 49 Transportation 7 2010-10-01 2010-10-01 false Head assembly. 572.182 Section 572.182... Dummy, 50th Percentile Adult Male § 572.182 Head assembly. (a) The head assembly consists of the...

  15. Heads Up: Concussion in Youth Sports

    Medline Plus

    Full Text Available ... in Spanish [Podcast: 1:27 minutes] Send a Health eCard Heads Up! Prevent Concussions Prevent Head Injuries ... in Spanish [Podcast: 1:27 minutes] Send a Health eCard Heads Up! Prevent Concussions Prevent Head Injuries ...

  16. Extracranial Head and Neck Schwannomas: Our Experience.

    Science.gov (United States)

    Shrikrishna, B H; Jyothi, A C; Kulkarni, N H; Mazhar, Md Shafiuddin

    2016-06-01

    Schwannomas are benign neoplasms of the peripheral nerves originating in the Schwann cells. They are rare and usually solitary, with clearly delimited capsules. They occur in the head and neck region in only 25 % of the cases, and may be associated with Von Recklinghausen's disease. Schwannomas are always a diagnostic dilemma as they are asymptomatic for long time and histopathology is the gold standard for diagnosis. The present study retrospectively analysed data of 4 patients with schwannomas and reviewed the literature on the subject. Retrospective study at ENT & Head and Neck Surgery Department of Navodaya Medical College, Raichur. Data of 4 patients between 2008 and 2014 were reviewed. The sites of cervical schwannomas and the intraoperative, histopathological and postoperative clinical status of these cases were studied. Diagnostic methods, type of surgery and associated nerve of origin (NOO) were evaluated. The patients' age ranged from 18 to 50 years. None of them had type I neurofibromatosis or Von Recklinghausen's disease. The nerves affected included the brachial plexus, vagus nerve, sympathetic chain and lingual nerve. The nerve of origin was identified based on intra-operative findings and post-operative neurological deficits. Tumour was removed by debulk operation with the preservation of NOO method. Schwannomas are generally benign, and rarely recur. An accurate preoperative workup with the identification of NOO is very important not only for a correct diagnosis, but also for surgical planning and informing the patient about the possible complications. PMID:27340644

  17. Abusive head trauma: two case reports.

    Science.gov (United States)

    Kanık, Ali; İnce, Osman Tolga; Yeşiloğlu, Şehriban; Eliaçık, Kayı; Bakiler, Ali Rahmi

    2015-09-01

    Abusive head trauma is a serious form of child abuse and mostly seen in infants below the age of two years as a result of a strong shaking by the caregiver who aims to stop the infant's crying. Characteristic symptoms include subdural hematomas, encephalopathy, retinal hemorrhages and fractures of the long bones. When physically examined, there are generally no externally visible signs. For this reason, it can be underdiagnosed, if it is not considered in the differential diagnosis. When the information provided from the parents is inconsistent and contradictory with the clinical picture of the patient, this form of abuse must be suspected and retinal hemorrhages should be searched. In this article, two patients who were admitted to our emergency department and diagnosed with physical child abuse are reported. One of these patients had a history of minor head trauma after falling down from the sofa and the other one had a history of breathlessness and loss of consciousness as a result of excessive crying. PMID:26568695

  18. Pediatric head trauma: the evidence regarding indications for emergent neuroimaging

    International Nuclear Information System (INIS)

    Traumatic brain injury (TBI) is a leading cause of childhood death and disability worldwide. In the United States, childhood head trauma results in approximately 3,000 deaths, 50,000 hospitalizations, and 650,000 emergency department (ED) visits annually. Children presenting to the ED with seemingly minor head trauma account for approximately one-half of children with documented TBIs. Despite the frequency and importance of childhood minor head trauma, there exists no highly accurate, reliable and validated clinical scoring system or prediction rule for assessing risk of TBI among those with minor head trauma. At the same time, use of CT scanning in these children in recent years has increased substantially. The major benefit of CT scanning is early identification (and treatment) of TBIs that might otherwise be missed and result in increased risk of morbidity and mortality. Unnecessary CT imaging, however, exposes the child needlessly to the risk of radiation-induced malignancies. What constitutes appropriate criteria for obtaining CT scans in children after minor blunt head trauma remains controversial. Current evidence to guide clinicians in this regard is limited; however, large studies performed in multi-center research networks have recently been conducted. These studies should provide the foundation of evidence to guide CT decisions by clinicians, help identify TBIs in a timely fashion, and reduce unnecessary radiation exposure. (orig.)

  19. Pediatric head trauma: the evidence regarding indications for emergent neuroimaging

    Energy Technology Data Exchange (ETDEWEB)

    Kuppermann, Nathan [UC Davis Medical Center, Department of Emergency Medicine, Sacramento, CA (United States); University of California, Davis School of Medicine, Departments of Emergency Medicine and Pediatrics, Davis, CA (United States)

    2008-11-15

    Traumatic brain injury (TBI) is a leading cause of childhood death and disability worldwide. In the United States, childhood head trauma results in approximately 3,000 deaths, 50,000 hospitalizations, and 650,000 emergency department (ED) visits annually. Children presenting to the ED with seemingly minor head trauma account for approximately one-half of children with documented TBIs. Despite the frequency and importance of childhood minor head trauma, there exists no highly accurate, reliable and validated clinical scoring system or prediction rule for assessing risk of TBI among those with minor head trauma. At the same time, use of CT scanning in these children in recent years has increased substantially. The major benefit of CT scanning is early identification (and treatment) of TBIs that might otherwise be missed and result in increased risk of morbidity and mortality. Unnecessary CT imaging, however, exposes the child needlessly to the risk of radiation-induced malignancies. What constitutes appropriate criteria for obtaining CT scans in children after minor blunt head trauma remains controversial. Current evidence to guide clinicians in this regard is limited; however, large studies performed in multi-center research networks have recently been conducted. These studies should provide the foundation of evidence to guide CT decisions by clinicians, help identify TBIs in a timely fashion, and reduce unnecessary radiation exposure. (orig.)

  20. Beam quality measure for vector beams.

    Science.gov (United States)

    Ndagano, Bienvenu; Sroor, Hend; McLaren, Melanie; Rosales-Guzmán, Carmelo; Forbes, Andrew

    2016-08-01

    Vector beams have found a myriad of applications, from laser materials processing to microscopy, and are now easily produced in the laboratory. They are usually differentiated from scalar beams by qualitative measures, for example, visual inspection of beam profiles after a rotating polarizer. Here we introduce a quantitative beam quality measure for vector beams and demonstrate it on cylindrical vector vortex beams. We show how a single measure can be defined for the vector quality, from 0 (purely scalar) to 1 (purely vector). Our measure is derived from a quantum toolkit, which we show applies to classical vector beams. PMID:27472580

  1. Wheelchair control by head motion

    Directory of Open Access Journals (Sweden)

    Pajkanović Aleksandar

    2013-01-01

    Full Text Available Electric wheelchairs are designed to aid paraplegics. Unfortunately, these can not be used by persons with higher degree of impairment, such as quadriplegics, i.e. persons that, due to age or illness, can not move any of the body parts, except of the head. Medical devices designed to help them are very complicated, rare and expensive. In this paper a microcontroller system that enables standard electric wheelchair control by head motion is presented. The system comprises electronic and mechanic components. A novel head motion recognition technique based on accelerometer data processing is designed. The wheelchair joystick is controlled by the system’s mechanical actuator. The system can be used with several different types of standard electric wheelchairs. It is tested and verified through an experiment performed within this paper.

  2. Return of the talking heads

    DEFF Research Database (Denmark)

    Reinecke Hansen, Kenneth; Bro, Peter; Andersson, Ralf

    2016-01-01

    The present article suggests that the brief history of Western television news dramaturgy can be expounded as three major waves: from the early days of the talking heads in the studio, over the narrativization of the field report to a (re-)current studio- and field-based talking heads format. In...... order to analyze the latest development entering the third wave, we propose a theoretically based dramaturgical model for the television news item. The analysis concludes that, with the current ‘return’ of the talking heads format, the pre-produced and pre-packaged bulletin program about past events is...... dissolving and transforming into an evaluative present- and future-oriented update format that resembles the 24-hour newsonly channels. Production time merges with broadcast time so that the uncertainty of live spreads to the dramaturgy....

  3. Beam propagation

    International Nuclear Information System (INIS)

    The main part of this thesis consists of 15 published papers, in which the numerical Beam Propagating Method (BPM) is investigated, verified and used in a number of applications. In the introduction a derivation of the nonlinear Schroedinger equation is presented to connect the beginning of the soliton papers with Maxwell's equations including a nonlinear polarization. This thesis focuses on the wide use of the BPM for numerical simulations of propagating light and particle beams through different types of structures such as waveguides, fibers, tapers, Y-junctions, laser arrays and crystalline solids. We verify the BPM in the above listed problems against other numerical methods for example the Finite-element Method, perturbation methods and Runge-Kutta integration. Further, the BPM is shown to be a simple and effective way to numerically set up the Green's function in matrix form for periodic structures. The Green's function matrix can then be diagonalized with matrix methods yielding the eigensolutions of the structure. The BPM inherent transverse periodicity can be untied, if desired, by for example including an absorptive refractive index at the computational window edges. The interaction of two first-order soliton pulses is strongly dependent on the phase relationship between the individual solitons. When optical phase shift keying is used in coherent one-carrier wavelength communication, the fiber attenuation will suppress or delay the nonlinear instability. (orig.)

  4. Stable beams

    CERN Multimedia

    2015-01-01

    Stable beams: two simple words that carry so much meaning at CERN. When LHC page one switched from "squeeze" to "stable beams" at 10.40 a.m. on Wednesday, 3 June, it triggered scenes of jubilation in control rooms around the CERN sites, as the LHC experiments started to record physics data for the first time in 27 months. This is what CERN is here for, and it’s great to be back in business after such a long period of preparation for the next stage in the LHC adventure.   I’ve said it before, but I’ll say it again. This was a great achievement, and testimony to the hard and dedicated work of so many people in the global CERN community. I could start to list the teams that have contributed, but that would be a mistake. Instead, I’d simply like to say that an achievement as impressive as running the LHC – a machine of superlatives in every respect – takes the combined effort and enthusiasm of everyone ...

  5. RH Department Information Meeting

    CERN Multimedia

    HR Department

    2010-01-01

    Dear Colleagues, HR Department would like to invite you to an information meeting which will be held on Thursday 30 September 2010 at 9:30 am in the Main Auditorium (Building 500)* A welcome coffee will be available from 9:00 a.m. The presentation will cover the CERN Competency Model which consists of the technical and behavioral competencies that are intrinsic to our Organization and its application in the various HR processes. This presentation will be followed by a questions & answers session. We look forward to seeing you all on 30 September! Best regards, Anne-Sylvie Catherin Head, Human Resources Department *This meeting will be simultaneously retransmitted and thereafter available at the following address: http://webcast.cern.ch.

  6. Head First 2D Geometry

    CERN Document Server

    Fallow), Stray

    2009-01-01

    Having trouble with geometry? Do Pi, The Pythagorean Theorem, and angle calculations just make your head spin? Relax. With Head First 2D Geometry, you'll master everything from triangles, quads and polygons to the time-saving secrets of similar and congruent angles -- and it'll be quick, painless, and fun. Through entertaining stories and practical examples from the world around you, this book takes you beyond boring problems. You'll actually use what you learn to make real-life decisions, like using angles and parallel lines to crack a mysterious CSI case. Put geometry to work for you, and

  7. Head kinematics during shaking associated with abusive head trauma.

    Science.gov (United States)

    Lintern, T O; Puhulwelle Gamage, N T; Bloomfield, F H; Kelly, P; Finch, M C; Taberner, A J; Nash, M P; Nielsen, P M F

    2015-09-18

    Abusive head trauma (AHT) is a potentially fatal result of child abuse but the mechanisms of injury are controversial. To address the hypothesis that shaking alone is sufficient to elicit the injuries observed, effective computational and experimental models are necessary. This paper investigates the use of a coupled rigid-body computational modelling framework to reproduce in vivo shaking kinematics in AHT. A sagittal plane OpenSim computational model of a lamb was developed and used to interpret biomechanical data from in vivo shaking experiments. The acceleration of the head during shaking was used to provide in vivo validation of the associated computational model. Results of this study demonstrated that peak accelerations occurred when the head impacted the torso and produced acceleration magnitudes exceeding 200ms(-)(2). The computational model demonstrated good agreement with the experimental measurements and was shown to be able to reproduce the high accelerations that occur during impact. The biomechanical results obtained with the computational model demonstrate the utility of using a coupled rigid-body modelling framework to describe infant head kinematics in AHT. PMID:26256822

  8. In vivo dosimetry with thermoluminescent dosimeters in external photon beam radiotherapy

    International Nuclear Information System (INIS)

    Full text: The aim of this work was the implementation of in vivo dosimetry with thermoluminescent dosimeters for treatments of head and neck cancers at a radiotherapy department in a public hospital of Ribeirao Preto, Brazil. For the setting up of the thermoluminescent dosimetric system several tests and measurements were made including the initialization procedure, the determination of the batch homogeneity, the determination of relative intrinsic sensitivity of each dosimeter, the determination of linearity range of the system and its calibration coefficients. Thermoluminescent dosimeter measurements were carried out for the cobalt-60 teletherapy unit photon beams. Practical guidelines provided in the first of the European Society for Therapeutic Radiology and Oncology (ESTRO) booklet on in vivo dosimetry were followed in the determination of entrance doses. Dose verification with the thermoluminescent dosimeters placed on the patients was performed. These measurements demonstrated the value of thermoluminescent dosimetry as a treatment verification method and its applicability as a part of a quality assurance program in radiotherapy

  9. Effect of head position on cephalometric evaluation of the soft-tissue facial profile

    NARCIS (Netherlands)

    R.C. Hoogeveen; G.C.H. Sanderink; W.E.R. Berkhout

    2013-01-01

    Objectives: During a cone beam CT scan, the patient is in an upright or supine position. This position depends on the brand and type of the scanner. The aims of this study are: (1) to investigate if the head position has an effect on cephalometric evaluation of the soft-tissue facial profile, compar

  10. Indications and Overuse of Computed Tomography in Minor Head Trauma

    OpenAIRE

    Zargar Balaye Jame, Sanaz; MAJDZADEH, Reza; AKBARI SARI, Ali; Rashidian, Arash; ARAB, Mohammad; Rahmani, Hojjat

    2014-01-01

    Background: Computed Tomography (CT) is a useful diagnostic technology, particularly in accident and emergency departments. Objectives: To identify a comprehensive list of indications for application of CT in patients with minor head trauma (MHT) and to determine appropriateness of its use on the basis of this list. Materials and Methods: A cross-sectional study was conducted in three Imaging centers in Tehran. A panel of experts developed a list of CT indications for MHT by reviewing documen...

  11. Chang Named To Head Virginia Tech's College Of Science

    OpenAIRE

    Hincker, Lawrence

    2003-01-01

    Lay Nam Chang, interim dean of Virginia Tech's College of Arts and Sciences and former head of the physics department, has been named dean of the university's College of Science following an in-house search that began in December. Chang's appointment to lead the college, which is evolving from the College of Arts and Sciences as part of Tech's restructuring, is effective on March 10.

  12. Aspects on the optimal photon beam energy for radiation therapy

    International Nuclear Information System (INIS)

    The selection of optimal photon beam energy is investigated both for realistic clinical bremsstrahlung beams and for monoenergetic photon beams. The photon energies covered in this investigation range from 60Co to bremsstrahlung and monoenergetic beams with maximum energies up to 50 MeV. One head and neck tumor and an advanced cervix tumor are investigated and the influence of beam direction is considered. It is shown that the use of optimized intensity modulated photon beams significantly reduces the need of beam energy selection. The most suitable single accelerator potential will generally be in the range 6-15 MV for both superficially located and deep-seated targets, provided intensity-modulated dose delivery is employed. It is also shown that a narrow penumbra region of a photon beam ideally should contain low-energy photons (≤4 MV), whereas the gross tumor volume, particularly when deep-seated targets are concerned, should be irradiated by high-energy photons. The regions where low photon energies are most beneficial are where organs at risk are laterally close to the target volume. The situation is completely changed when uniform or wedged beams are used. The selection of optimal beam energy then becomes a very important task in line with the experience from traditional treatment techniques. However, even with a large number of uniform beam portals, the treatment outcome is substantially lower than with a few optimized intensity-modulated beams. (orig.)

  13. Head Start: Undercover Testing Finds Fraud and Abuse at Selected Head Start Centers. Testimony before the Committee on Education and Labor, House of Representatives. GAO-10-733T

    Science.gov (United States)

    Kutz, Gregory D.

    2010-01-01

    The Head Start program, overseen by the Department of Health and Human Services and administered by the Office of Head Start, provides child development services primarily to low-income families and their children. Federal law allows up to 10 percent of enrolled families to have incomes above 130 percent of the poverty line--GAO (Government…

  14. Methods for beam data acquisition offered by a mini-phantom

    International Nuclear Information System (INIS)

    Mini-phantoms are an important tool for measurement of basic head scatter parameters in high-energy photon beams, and recently they have also been used for beam quality specification. Therefore the feasibility and reliability of basic beam parameter acquisition using only a mini-phantom is checked in 6, 18 and 25 MV photon beams. These parameters include head scatter correction factors, phantom scatter correction factors, total scatter correction factors, wedge factors, off-axis ratios, as well as beam attenuation coefficients and beam hardening coefficients. In order to specify beam quality variations and beam quality modifications by a wedge, two different methods are compared: the first method uses a constant source to chamber distance of 1 m, the second method refers to narrow beam geometry. μ values derived with two different beam quality specification methods show a systematic deviation. However, relative variations of the attenuation coefficient within the beam and the associated beam quality modifications observed with the two methods show good agreement in open and wedged beams. Phantom scatter correction factors are calculated from measured head scatter correction factors and total scatter correction factors as well as from attenuation coefficients. Measured and calculated phantom scatter correction factors agree within 1% with the values given in literature. For 18 and 25 MV photon beam, wedge factors measured in water or in the mini-phantom agree within 0.5%, but maximum deviations of ∼1.5% are observed at 6 MV for the largest field sizes. It is demonstrated that the determination of several beam data related to full scatter conditions does not necessarily require the availability of a full scatter phantom. The mini-phantom is a reliable but very cheap and simple tool. It offers versatile possibilities to measure, check and verify basic beam parameters in high-energy photon beams. (author)

  15. Cyclic loadings on steel and lightweight concrete composite beams

    OpenAIRE

    Valente, Isabel; Cruz, Paulo J. S.

    2006-01-01

    This communication describes the experimental cyclic tests performed on steel and high strength lightweight concrete composite beams, at Universidade do Minho, Portugal. The experimental study involves tests on simply supported beams, all with the same geometrical disposition, supports and materials. Headed studs are used to provide the connection between the steel profile and the lightweight concrete slab. The parameters in study are the stud disposition and the number and range of the...

  16. Design of pitch conversion component for formation of multibeam optical recording head

    Science.gov (United States)

    Sasaki, Kentaro; Kawamura, Norikazu; Tokumaru, Haruki

    2008-04-01

    We describe a design of a planar lightwave circuit for parallel information processing using visible light. The circuit serves as a pitch conversion component (PCC) that can align multiple beams close together and easily composes a compact optical system that can project optical spots at a narrow pitch on a certain small plane. From the viewpoint of its application to optical recording, a PCC is designed to have over 50 waveguides according to the fabrication of waveguides for a blue-violet beam. It is analytically confirmed that a PCC contributes to the formation of a multibeam optical recording head with numerous beams.

  17. Firing Properties of Rat Lateral Mammillary Single Units: Head Direction, Head Pitch, and Angular Head Velocity

    OpenAIRE

    Stackman, Robert W.; Taube, Jeffrey S.

    1998-01-01

    Many neurons in the rat anterodorsal thalamus (ADN) and postsubiculum (PoS) fire selectively when the rat points its head in a specific direction in the horizontal plane, independent of the animal’s location and ongoing behavior. The lateral mammillary nuclei (LMN) are interconnected with both the ADN and PoS and, therefore, are in a pivotal position to influence ADN/PoS neurophysiology. To further understand how the head direction (HD) cell signal is generated, we recorded single neurons fro...

  18. Magnetic Resonance Imaging (MRI) -- Head

    Medline Plus

    Full Text Available ... very early stage by mapping the motion of water molecules in the tissue. This water motion, known as diffusion, is impaired by most ... page Additional Information and Resources RTAnswers.org : Radiation Therapy for Brain Tumors Radiation Therapy for Head and ...

  19. Magnetic Resonance Imaging (MRI) -- Head

    Medline Plus

    Full Text Available ... structures of the brain and can also provide functional information (fMRI) in selected cases. MR images of ... Articles and Media MR Angiography (MRA) Magnetic Resonance, Functional (fMRI) - Brain Head and Neck Cancer Treatment Brain ...

  20. Magnetic Resonance Imaging (MRI) -- Head

    Medline Plus

    Full Text Available ... symptoms. It can help diagnose conditions such as: brain tumors stroke infections developmental anomalies hydrocephalus — dilatation of fluid ... Information and Resources RTAnswers.org : Radiation Therapy for Brain Tumors Radiation Therapy for Head and Neck Cancer Others : ...

  1. Blunt Head Trauma and Headache

    Directory of Open Access Journals (Sweden)

    Ana B Chelse

    2015-04-01

    Full Text Available Investigators from New York Presbyterian Morgan Stanley Children’s Hospital examined whether having an isolated headache following minor blunt head trauma was suggestive of traumatic brain injury (TBI among a large cohort of children 2-18 years of age.

  2. Magnetic Resonance Imaging (MRI) -- Head

    Medline Plus

    Full Text Available ... of which shows a thin slice of the body. The images can then be studied from different angles by ... information please consult the ACR Manual on Contrast Media and its references. top of page What are the limitations of MRI of the Head? High-quality images are assured only if you are able to ...

  3. A Proposal to the Department of Energy for The Fabrication of a Very High Energy Polarized Gama Ray Beam Facility and A Program of Medium Energy Physics Research at The National Synchrotron Light Source

    Energy Technology Data Exchange (ETDEWEB)

    Sandorfi, A.M.; LeVine, M.J.; Thorn, C.E.; Giordano, G.; Matone, G.

    1982-09-01

    This proposal requests support for the fabrication and operation of a modest facility that would provide relatively intense beams of monochromatic and polarized photons with energies in the range of several hundreds of MeV. These {gamma} rays would be produced by Compton backscattering laser light from the electrons circulating in the 2.5-3.0 GeV 'X-RAY' storage ring of the National Synchrotron Light Source (NSLS) at Brookhaven National Laboratory. The excellent emittance, phase space, and high current of this state-of-the-art storage ring will allow the production of 2 x 10{sup 7} {gamma} rays per second. These photons would be tagged by detecting the scattered electrons, thereby determining the energy to 2.7 MeV for all {gamma}-ray energies. The efficiency of this tagging procedure is 100% and the {gamma}-ray beam would be essentially background free. Tagging will also allow the flexibility of operating with a dynamic range as large as 200 MeV in photon energy while still preserving high resolution and polarization. These beams will permit a fruitful study of important questions in medium-energy nuclear physics. The initial goals of this program are to reach reliable operation with photon energies up to 300 MeV and to develop {gamma}-ray beams with energies up to about 500 MeV. To demonstrate reliable operation, a modest physics program is planned that, for the most part, utilizes existing magnets and detector systems but nonetheless addresses several important outstanding problems. Gamma ray beams of the versatility, intensity, energy, and resolution that can be achieved at this facility are not currently available at any other world facility either existing or under construction. Furthermore, the proposed program would produce the first intense source of medium-energy {gamma} rays that are polarized. Because of the difficulties in producing such polarized beams, it is very unlikely that viable alternate sources can be developed in the near future; at

  4. Head-to-head linked isoprenoids in Miocene coal lithotypes

    Energy Technology Data Exchange (ETDEWEB)

    Stefanova, M. [Bulgarian Academy of Sciences, Sofia (Bulgaria). Inst. of Organic Chemistry

    2000-05-01

    Aliphatic fractions of chloroform bitumens from homogeneous (humovitrain, xylain and liptain) and heterogeneous (humoclarain) lithotypes of lignite Maritza-Iztok as well as products of their mild reduction with NaH were studied for acyclic isoprenoid biomarkers. Mass spectral data revealed the presence of regular C{sub 19}-C{sub 33} isoprenoids without pristane/phytane dominance, one 'tail to tail' isoprenoid, C{sub 30}, squalene, in all samples under study. High molecular weight 'head-to-head' isoprenoids, C{sub 38}-C{sub 40}, with slight preponderance of coupled pristyl- and phytyl units were registered in humovitrain and humoclarain samples after NaH treatment. These irregular isoprenoids are indicators for strictly anaerobic methanogens present in paleodepositional environment. Mild reductive treatment with NaH is a promising approach to rupture ether linkage in coal structure and give us one more possibility to loose isoprenoid moieties. 12 refs., 2 figs.

  5. Top of Head Scarp and Internal Scarps for Landslide Deposits in the Little North Santiam River Basin, Oregon

    Data.gov (United States)

    U.S. Geological Survey, Department of the Interior — Data points represent head scarps, flank scarps, and minor internal scarps (linear) associated with landslide deposits in the Little North Santiam River Basin,...

  6. Spring 1961 hydraulic head in the lower pumped zone of California's Central Valley (from Williamson and others, 1989)

    Data.gov (United States)

    U.S. Geological Survey, Department of the Interior — This digital dataset defines the spring 1961 hydraulic head in the lower pumped zone of California's Central Valley. It was used to initiate the water-level...

  7. Beam halo in high-intensity beams

    International Nuclear Information System (INIS)

    In space-charge dominated beams the nonlinear space-charge forces produce a filamentation pattern, which in projection to the 2-D phase spaces results in a 2-component beam consisting of an inner core and a diffuse outer halo. The beam-halo is of concern for a next generation of cw, high-power proton linacs that could be applied to intense neutron generators for nuclear materials processing. The author describes what has been learned about beam halo and the evolution of space-charge dominated beams using numerical simulations of initial laminar beams in uniform linear focusing channels. Initial results are presented from a study of beam entropy for an intense space-charge dominated beam

  8. Heads Up: Concussion in Youth Sports

    Medline Plus

    Full Text Available ... directors, athletic trainers, and parents “Heads Up” for school nurses, parents, teachers, counselors, and other school professionals “Heads Up” for health care professionals Baseline ...

  9. Heads Up: Concussion in Youth Sports

    Medline Plus

    Full Text Available ... Headache or "pressure" in head Nausea or vomiting Balance problems or dizziness Double or blurry vision Sensitivity ... pressure” in head 11 Nausea or vomiting 12 Balance problems or dizziness 13 Double or blurry vision ...

  10. Beam imaging sensor

    Energy Technology Data Exchange (ETDEWEB)

    McAninch, Michael D.; Root, Jeffrey J.

    2016-07-05

    The present invention relates generally to the field of sensors for beam imaging and, in particular, to a new and useful beam imaging sensor for use in determining, for example, the power density distribution of a beam including, but not limited to, an electron beam or an ion beam. In one embodiment, the beam imaging sensor of the present invention comprises, among other items, a circumferential slit that is either circular, elliptical or polygonal in nature.

  11. Transverse beams stability studies at the Large Hadron Collider

    CERN Document Server

    Buffat, Xavier; Pieloni, Tatiana

    2015-01-30

    A charged particle beam travelling at the speed of light produces large electromagnetic wake fields which, through interactions with its surroundings, act back on the particles in the beam. This coupled system may become unstable, resulting in a deterioration of the beam quality. Such effects play a major role in most existing storage rings, as they limit the maximum performance achievable. In a collider, the presence of a second beam significantly changes the dynamics, as the electromagnetic interactions of the two beams on each other are usually very strong and may, also, limit the collider performances. This thesis treats the coherent stability of the two beams in a circular collider, including the effects of the electromagnetic wake fields and of the beam-beam interactions, with particular emphasis on CERN's Large Hadron Collider. As opposed to other colliders, this machine features a large number of bunches per beam each experiencing multiple long-range and head-on beam-beam interactions. Existing models...

  12. First Class Call Stacks: Exploring Head Reduction

    OpenAIRE

    Johnson-Freyd, Philip; Downen, Paul; Ariola, Zena M.

    2016-01-01

    Weak-head normalization is inconsistent with functional extensionality in the call-by-name $\\lambda$-calculus. We explore this problem from a new angle via the conflict between extensionality and effects. Leveraging ideas from work on the $\\lambda$-calculus with control, we derive and justify alternative operational semantics and a sequence of abstract machines for performing head reduction. Head reduction avoids the problems with weak-head reduction and extensionality, while our operational ...

  13. Process optimization in the head end area

    International Nuclear Information System (INIS)

    The measures to improve feed clarity and how they fit into the overall concept of the chemical head end are described as considerable changes in the head end. The effects which the conversion from the bundle shears to the individual rod shears has on the mechanical head end are also shown. The changes made, particularly in the chemical head end, are intended to increase the availability of the main process by improved feed clarity with a centrifuge, container and filter. (orig./DG)

  14. Beam-beam effects in the high-pile-up tests of the LHC

    CERN Document Server

    Trad, G

    2014-01-01

    Investigating the beam-beam limit in the LHC is of great importance, since identifying its source is crucial for the luminosity optimization scenario. Several experiments were carried out to search for this limit and check whether it is dominated by the head-on (HO) or the long-range (LR) interactions. In this paper only the HO collision effects will be considered, tracking the evolution of the maximum tune shift achieved during the dedicated machine developments and the special high pile-up fills.

  15. Beam-beam effects in the high-pile-up tests of the LHC

    OpenAIRE

    Trad, G.

    2014-01-01

    Investigating the beam-beam limit in the LHC is of great importance, since identifying its source is crucial for the luminosity optimization scenario. Several experiments were carried out to search for this limit and check whether it is dominated by the head-on (HO) or the long-range (LR) interactions. In this paper only the HO collision effects will be considered, tracking the evolution of the maximum tune shift achieved during the dedicated machine developments and the special high pile-up ...

  16. Colliding beam physics at Fermilab: interaction regions, beam storage, antiproton cooling, production, and colliding

    Energy Technology Data Exchange (ETDEWEB)

    Walker, J.K. (ed.)

    1977-01-01

    The purpose of the colliding beams experment department at Fermilab was to bring about collisions of the stored beams in the energy doubler/saver and main ring, and construct experimental areas with appropriate detectors. To explore the feasibility of using the main ring as a storage device, several studies were carried out to investigate beam growth, loss, and the backgrounds in detectors at possible intersection regions. This range of developments constituted the major topics at the 1977 Summer Study reported here. Emphasis in part one is on interaction regions, beam storage, antiproton cooling, production, and colliding. 40 papers from this part are included in the data base. (GHT)

  17. HISTOLOGY AND PHYSIOLOGY OF FUSARIUM HEAD BLIGHT

    Science.gov (United States)

    Fusarium head blight re-emerged as a devastating disease of wheat and barley in the 1990s in the midwestern U.S. Research efforts to control the disease have been hampered by limited knowledge of how the fungal head blight pathogens infect and damage head tissue and what natural defenses the plant h...

  18. Heads Up: Concussion in Youth Sports

    Medline Plus

    Full Text Available ... TOOLS — CONCUSSION INFORMATION View CDC's “Heads Up” Concussion Educational Materials “Heads Up” for youth sports coaches, administrators, ... parents Order Free Copies of CDC's “Heads Up” Educational Materials Materials on Concussion in Sports Materials for ...

  19. Heads Up: Concussion in Youth Sports

    Medline Plus

    Full Text Available ... CONCUSSION INFORMATION View CDC's “Heads Up” Concussion Educational Materials “Heads Up” for youth sports coaches, administrators, and ... Order Free Copies of CDC's “Heads Up” Educational Materials Materials on Concussion in Sports Materials for Health ...

  20. 21 CFR 868.1930 - Stethoscope head.

    Science.gov (United States)

    2010-04-01

    ... 21 Food and Drugs 8 2010-04-01 2010-04-01 false Stethoscope head. 868.1930 Section 868.1930 Food... DEVICES ANESTHESIOLOGY DEVICES Diagnostic Devices § 868.1930 Stethoscope head. (a) Identification. A stethoscope head is a weighted chest piece used during anesthesia to listen to a patient's heart, breath,...

  1. Resection indications of radius head fractures

    OpenAIRE

    Domanic, Unsal; Taser, Omer; Akalin, Yilmaz; Cakmak, Mehmet

    2004-01-01

    Boundaries of resection indication of radius head and timing of resection problems in radius head fractures are discussed on our cases with literature on the subject. In Mason type II. And type III., the best treatment is resection of the head. But it must be performed as soon as possible.

  2. Kafedra radiotekhnichnykh prystroiv ta system [Department of radio engineering devices and systems

    OpenAIRE

    V. P. Taranenko

    1998-01-01

    The department was founded in 1945 after the division of the department receiving and transmitting devices into two: radio receivers and radio transmitters in accordance with the direction and content of research the educational process changed its name to the radio engineering devices and systems. first department was headed by a famous scientist, corresponding member of the Academy of Sciences, Professor Semen Isaakovich Tetelbaum. After his death in 1958 the department was headed by his di...

  3. First experiences with acceptance testing of multiple head SPECT cameras

    International Nuclear Information System (INIS)

    User acceptance testing of newly installed gamma cameras is mandatory in order to verify manufacturers' specifications and to ensure optimal image quality. Acceptance test procedures are widely standardized today and are carried out following commonly accepted test protocols. Two new triple head gamma cameras have been installed during the last year at the Department of Nuclear Medicine of the Vienna University Hospital. For acceptance testing of these cameras a modified and expanded version of the commonly used test protocol for single head SPECT systems has been employed. Details of the tests that have been carried out and a comparison of the results obtained for both cameras are presented. Furthermore, some specific problems that are encountered during acceptance testing of multiple head systems are discussed. In particular it has been noted that some important tests of intrinsic camera parameters cannot be carried out, which makes a complete verification of vendors' specifications impossible. In spite of these problems the acceptance test system for multiple head cameras presented in this work was sufficient for establishing proper working conditions for clinical use. (authors)

  4. Supernumerary head of biceps brachii

    Directory of Open Access Journals (Sweden)

    Balasubramanian A

    2010-12-01

    Full Text Available The biceps brachii muscle and the musculocutaneous nerve of arm are frequent in their variations. A third head of biceps brachii was noted unilaterally during routine anatomy dissection. Variation in musculocutaneous nerve was also seen on the same arm. The evolutionary and functional basis of such variations are discussed. Such variations become relevant during surgical intervention of the arm, especially after humeral fracture with subsequent unusual bone displacements.

  5. ACR Appropriateness Criteria Head Trauma.

    Science.gov (United States)

    Shetty, Vilaas S; Reis, Martin N; Aulino, Joseph M; Berger, Kevin L; Broder, Joshua; Choudhri, Asim F; Kendi, A Tuba; Kessler, Marcus M; Kirsch, Claudia F; Luttrull, Michael D; Mechtler, Laszlo L; Prall, J Adair; Raksin, Patricia B; Roth, Christopher J; Sharma, Aseem; West, O Clark; Wintermark, Max; Cornelius, Rebecca S; Bykowski, Julie

    2016-06-01

    Neuroimaging plays an important role in the management of head trauma. Several guidelines have been published for identifying which patients can avoid neuroimaging. Noncontrast head CT is the most appropriate initial examination in patients with minor or mild acute closed head injury who require neuroimaging as well as patients with moderate to severe acute closed head injury. In short-term follow-up neuroimaging of acute traumatic brain injury, CT and MRI may have complementary roles. In subacute to chronic traumatic brain injury, MRI is the most appropriate initial examination, though CT may have a complementary role in select circumstances. Advanced neuroimaging techniques are areas of active research but are not considered routine clinical practice at this time. In suspected intracranial vascular injury, CT angiography or venography or MR angiography or venography is the most appropriate imaging study. In suspected posttraumatic cerebrospinal fluid leak, high-resolution noncontrast skull base CT is the most appropriate initial imaging study to identify the source, with cisternography reserved for problem solving. The ACR Appropriateness Criteria are evidence-based guidelines for specific clinical conditions that are reviewed every three years by a multidisciplinary expert panel. The guideline development and review include an extensive analysis of current medical literature from peer-reviewed journals and the application of a well-established consensus methodology (modified Delphi) to rate the appropriateness of imaging and treatment procedures by the panel. In those instances in which evidence is lacking or not definitive, expert opinion may be used to recommend imaging or treatment. PMID:27262056

  6. Beam Dynamics in an Electron Lens with the Warp Particle-in-cell Code

    CERN Document Server

    Stancari, Giulio; Redaelli, Stefano

    2014-01-01

    Electron lenses are a mature technique for beam manipulation in colliders and storage rings. In an electron lens, a pulsed, magnetically confined electron beam with a given current-density profile interacts with the circulating beam to obtain the desired effect. Electron lenses were used in the Fermilab Tevatron collider for beam-beam compensation, for abort-gap clearing, and for halo scraping. They will be used in RHIC at BNL for head-on beam-beam compensation, and their application to the Large Hadron Collider for halo control is under development. At Fermilab, electron lenses will be implemented as lattice elements for nonlinear integrable optics. The design of electron lenses requires tools to calculate the kicks and wakefields experienced by the circulating beam. We use the Warp particle-in-cell code to study generation, transport, and evolution of the electron beam. For the first time, a fully 3-dimensional code is used for this purpose.

  7. Drift Compression of an Intense Neutralized Ion Beam

    International Nuclear Information System (INIS)

    Longitudinal compression of a velocity-tailored, intense neutralized K+ beam at 300 keV, 25 mA has been demonstrated. The compression takes place in a 1-2 m drift section filled with plasma to provide space-charge neutralization. An induction cell produces a head-to-tail velocity ramp that longitudinally compresses the neutralized beam, enhancing the beam peak current by a factor of 50 and producing a pulse duration of about 3 ns. This measurement has been confirmed independently with two different diagnostic systems

  8. A symplectic coherent beam-beam model

    International Nuclear Information System (INIS)

    We consider a simple one-dimensional model to study the effects of the beam-beam force on the coherent dynamics of colliding beams. The key ingredient is a linearized beam-beam kick. We study only the quadrupole modes, with the dynamical variables being the 2nd-order moments of the canonical variables q, p. Our model is self-consistent in the sense that no higher order moments are generated by the linearized beam-beam kicks, and that the only source of violation of symplecticity is the radiation. We discuss the round beam case only, in which vertical and horizontal quantities are assumed to be equal (though they may be different in the two beams). Depending on the values of the tune and beam intensity, we observe steady states in which otherwise identical bunches have sizes that are equal, or unequal, or periodic, or behave chaotically from turn to turn. Possible implications of luminosity saturation with increasing beam intensity are discussed. Finally, we present some preliminary applications to an asymmetric collider. 8 refs., 8 figs

  9. Literature in Focus Beta Beams: Neutrino Beams

    CERN Document Server

    2009-01-01

    By Mats Lindroos (CERN) and Mauro Mezzetto (INFN Padova, Italy) Imperial Press, 2009 The beta-beam concept for the generation of electron neutrino beams was first proposed by Piero Zucchelli in 2002. The idea created quite a stir, challenging the idea that intense neutrino beams only could be produced from the decay of pions or muons in classical neutrino beams facilities or in future neutrino factories. The concept initially struggled to make an impact but the hard work by many machine physicists, phenomenologists and theoreticians over the last five years has won the beta-beam a well-earned position as one of the frontrunners for a possible future world laboratory for high intensity neutrino oscillation physics. This is the first complete monograph on the beta-beam concept. The book describes both technical aspects and experimental aspects of the beta-beam, providing students and scientists with an insight into the possibilities o...

  10. Expressiveness of multiple heads in CHR

    CERN Document Server

    Di Giusto, Cinzia; Meo, Maria Chiara

    2008-01-01

    Constraint Handling Rules (CHR) are a committed-choice declarative language which has been designed for writing constraint solvers. A CHR program consists of multi-headed guarded rules which allow one to rewrite constraints into simpler ones until a solved form is reached. Many examples in the vast literature on the subject show that multiple heads are important in order to write programs which solve specific problems. On the other hand, the presence of multiples heads complicates considerably the semantics. Therefore, since restricting to single head rules does not affect the Turing completeness of the language, one can legitimately ask whether multiple heads do indeed augment the expressive power of the language. In this paper we answer positively to this question by showing that, under certain reasonable assumptions, it is not possible to encode the CHR language (with multi-headed rules) into a single head language while preserving the intended meaning of programs.

  11. Replacing the Beam Dump at the Booster

    CERN Multimedia

    2013-01-01

    The PS Booster Dump, designed in the 1960’s to cope with beam energies in the order of 800 MeV, has been dismantled and replaced with a new one, capable of withstanding the 2 GeV beam provided by the upcoming LINAC4 at CERN. This video shows the installation of that new dump core inside a one-metre diameter cavity, surrounded by five shielding rings made of concrete and steel. It is the culmination of months of preparation, an interdisciplinary work involving several teams from the Engineering, Beams and Technology Departments, as well as the collaboration and supervision of radio-protection experts.

  12. Metallurgy Department

    DEFF Research Database (Denmark)

    Risø National Laboratory, Roskilde

    The activities of the Metallurgy Department at Risø during 1981 are described. The work is presented in three chapters: General Materials Research, Technology and Materials Development, Fuel Elements. Furthermore, a survey is given of the department's participation in international collaboration...

  13. Urban–rural differences in pediatric traumatic head injuries: A prospective nationwide study

    Directory of Open Access Journals (Sweden)

    Jonas G Halldorsson

    2007-01-01

    Full Text Available Jonas G Halldorsson1, Kjell M Flekkoy2, Kristinn R Gudmundsson3, Gudmundur B Arnkelsson4, Eirikur Orn Arnarson1,51Psychological Health Services, Landspitali University Hospital, Reykjavik, Iceland; 2Department of Psychology, University of Oslo, Oslo, Norway; 3Department of Neurosurgery, Landspitali University Hospital, Reykjavik, Iceland; 4Faculty of Social Science, University of Iceland, Reykjavik, Iceland; 5Faculty of Medicine, University of Iceland, Reykjavik, IcelandAims: To estimate differences in the incidence of recorded traumatic head injuries by gender, age, severity, and geographical area.Methods: The study was prospective and nationwide. Data were collected from all hospitals, emergency units and healthcare centers in Iceland regarding all Icelandic children and adolescents 0–19 years old consecutively diagnosed with traumatic head injuries (N = 550 during a one-year period.Results: Annual incidence of minimal, mild, moderate/severe, and fatal head injuries (ICD-9 850–854 was 6.41 per 1000, with 95% confi dence interval (CI 5.9, 7.0. Annual incidence of minimal head injuries (ICD-9 850 treated at emergency units was 4.65 (CI 4.2, 5.1 per 1000, mild head injuries admitted to hospital (ICD-9 850 was 1.50 (CI 1.3, 1.8 per 1000, and moderate/severe nonfatal injuries (ICD-9 851–854 was 0.21 (CI 0.1, 0.3 per 1000. Death rate was 0.05 (CI 0.0, 0.1 per 1000. Young children were at greater risk of sustaining minimal head injuries than older ones. Boys were at greater risk than girls were. In rural areas, incidence of recorded minimal head injuries was low.Conclusions: Use of nationwide estimate of the incidence of pediatric head injury shows important differences between urban and rural areas as well as between different age groups.Keywords: incidence, nationwide, pediatric, prospective, traumatic head injuries, urban-rural differences

  14. Ischemic Retinopathy and Neovascular Proliferation Secondary to Severe Head Injury

    Directory of Open Access Journals (Sweden)

    Muge Coban-Karatas

    2014-01-01

    Full Text Available We report a case with severe head trauma and perforating globe injury in one eye and ischemic retinopathy and neovascular proliferation in the other eye. A 37-year-old male was brought to the emergency department after a motor vehicle accident with severe maxillofacial trauma. Ophthalmic examination revealed hematoma of the left eyelids as well as traumatic rupture and disorganization of the left globe. On the right eye, anterior segment and fundoscopic examination were normal. Primary globe repair was performed. At postoperative one-month visit, the right eye revealed no pathology of the optic disc and macula but severe neovascularization in the temporal peripheral retina. The patient was diagnosed as ischemic retinopathy and neovascular proliferation due to head trauma.

  15. Ion beam diagnosis

    International Nuclear Information System (INIS)

    This report is an introduction to ion beam diagnosis. After a short description of the most important ion beam parameters measurements of the beam current by means of Faraday cups, calorimetry, and beam current transformers and measurements of the beam profile by means of viewing screens, profile grids and scanning devices, and residual gas ionization monitors are described. Finally measurements in the transverse and longitudinal phase space are considered. (HSI)

  16. The beam dump tunnels

    CERN Multimedia

    Patrice Loïez

    2002-01-01

    In these images workers are digging the tunnels that will be used to dump the counter-circulating beams. Travelling just a fraction under the speed of light, the beams at the LHC will each carry the energy of an aircraft carrier travelling at 12 knots. In order to dispose of these beams safely, a beam dump is used to extract the beam and diffuse it before it collides with a radiation shielded graphite target.

  17. Agricultural Research Department annual report 1983

    International Nuclear Information System (INIS)

    A description is given of the work in the Agricultural Research Department of Risoe National Laboratory. The description is given under the headings a) plant breeding research, and b) energy consumption in plant cultivation. A list of staff members and of publications is also given. (BP)

  18. The Agricultural Research Department annual report 1985

    International Nuclear Information System (INIS)

    A description is given of the work in the Agricultural Research Department of Risoe National Laboratory. The description is given under the headings a) plant breeding research, and b) energy consumption in plant cultivation. A list of staff members is also given. (bp)

  19. Agricultural Research Department annual report 1984

    International Nuclear Information System (INIS)

    A description is given of the work in the Agricultural Research Department of Risoe National Laboratory. The description is given under the headings a) plant breeding research, and b) energy sumption in plant cultivation. A list of staff members is also given. (bp)

  20. Department of Radiation Detectors: Overview

    International Nuclear Information System (INIS)

    (full text) Work carried out in 1997 in the Department of Radiation Detectors concentrated on three subjects: (i) Semiconductor Detectors (ii) X-ray Tube Generators (iii) Material Modification using Ion and Plasma Beams. Semiconductor detectors: Semiconductor detectors of ionizing radiation are among the basic tools utilized in such fields of research and industry as nuclear physics, high energy physics, medical (oncology) radiotherapy, radiological protection, environmental monitoring, energy dispersive X-ray fluorescence non-destructive analysis of chemical composition, nuclear power industry. The Department all objectives are: - search for new types of detectors, - adapting modern technologies (especially of industrial microelectronics) to detector manufacturing, - producing unique detectors tailored for physics experiments, - manufacturing standard detectors for radiation measuring instruments, - scientific development of the staff. These 1997 objectives were accomplished particularly by: - research on unique detectors for nuclear physics (e.g. transmission type Si(Li) detectors with extremely thin entrance and exit window), - development of technology of high-resistivity (HRSi) silicon detectors and thermoelectric cooling systems (KBN grant), - study of the applicability of industrial planar technology in producing detectors, - manufacturing detectors developed in previous years, re-generating and servicing customer detectors of various origin. In accomplishing of the above, the Department cooperated with interested groups of physicists from our Institute (P-I and P-II Departments), Warsaw University, Warsaw Heavy Ion Laboratory and with some technology Institutes based in Warsaw (ITME, ITE). Some detectors and services have been delivered to customers on a commercial basis. X-Rat tube generators: The Department conducts research on design and technology of producing X-ray generators based on X-ray tubes of special construction. In 1997, work on a special

  1. ILC Beam Energy Measurement by means of Laser Compton Backscattering

    CERN Document Server

    Muchnoi, N; Viti, M

    2008-01-01

    A novel, non-invasive method of measuring the beam energy at the International Linear Collider is proposed. Laser light collides head-on with beam particles and either the energy of the Compton scattered electrons near the kinematic end-point is measured or the positions of the Compton backscattered $\\gamma$-rays, the edge electrons and the unscattered beam particles are recorded. A compact layout for the Compton spectrometer is suggested. It consists of a bending magnet and position sensitive detectors operating in a large radiation environment. Several options for high spatial resolution detectors are discussed. Simulation studies support the use of an infrared or green laser and quartz fiber detectors to monitor the backscattered photons and edge electrons. Employing a cavity monitor, the beam particle position downstream of the magnet can be recorded with submicrometer precision. Such a scheme provides a feasible and promising method to access the incident beam energy with precisions of $10^{-4}$ or bette...

  2. Implantation of iodine-125 seed for head and neck carcinoma

    International Nuclear Information System (INIS)

    Objective: To investigate the technological feasibility, efficacy and morbidity of 125I-seed implantation for head and neck cancer. Methods: Forty patients with head and neck cancer were treated with 125I-seed intersitial brachytherapy guided by uhrasound or CT. Among them thirty-six patients were performed under local anesthesia and four were under general anesthesia. Thirty-six patients were treated with 125I-seed implantation under ultrasound guidance and four cases under CT guidance. Seed needles were implanted in parallel with each other, 1-1.5 cm apart. Mick applicator was used to each needle to implant seed. The radioactive activity ranged 0.40-0.70 mCi, and the matched peripheral doses were 90-145 Gy. The mean number of 125I-seed was 3-84. Five cases received external beam irradiation one week after seed implantation, and the total doses were 45-50 Gy(200 cGy/f). All the cases were examined by X-ray or CT after implantation for quality evaluation and by routine chest X ray within twenty-four to forty-eight hours after seed implantation. Results: These patients were followed-up for 3-33 months. In 10 tongue carcinoma patients, complete response was shown in 3 cases, partial response in three cases, no change in three cases and progressive disease in one case. The local control rate was 60%, the median survival time was 11 monthes, and the one-year and two year survival rates were 87.50% and 35%, respectively. In 14 patients with recurrent cancer of head and neck the local control rate was 76.47% ,the one-year and two-year survival rates were 66.08% and 24%, respectively, and the median survival time was 9 months. In 16 patients with metastatic cancer of head and neck the local control rate was 95.23%, the one-year and two-year survival rates were 54.55% and 32.73%, and the median survival time was 9 months. One seed migrated to the maxilla and loss of seeds happened in two cases, but there was no clinically related mobidity. Conclusion: 125I

  3. Migraine, head trauma and sport.

    Science.gov (United States)

    Ashworth, B

    1985-10-01

    In some people an attack of migraine may be provoked by heading a football or a blow on the face in a rugby tackle. The attack is sometimes alarming and clearly cannot be explained on a basis of trauma alone. Some people only have attacks in this particular circumstance but the majority have spontaneous episodes at other times. The presentation is usually in childhood or early adult life. The syndrome is discussed in relation to reports of seven patients to illustrate the variations which include migraine without headache and persistent features after the attack. The condition is benign but may cause the patient to give up playing football. PMID:4095535

  4. Head Access Piping System Desing

    OpenAIRE

    中大路 道彦; 一宮 正和; 向坊 隆一; 前田 清彦; 永田 敬

    1994-01-01

    PNC made design studies on loop type FBR plants:a 600 MWe class in '91, and a 1300 MWe class in '93 both with the "head access" primary piping system. This paper focuses on the features of the smaller plant at first and afterwards on the extension to the larger one. The contents of the paper consist of R/V wall protection mechanism, primary piping circuit, secondary piping circuit, plant layout and then, discusses the extension of the applicability of the wall protection mechanism, primary pi...

  5. Head First jQuery

    CERN Document Server

    Benedetti, Ryan

    2011-01-01

    Want to add more interactivity and polish to your websites? Discover how jQuery can help you build complex scripting functionality in just a few lines of code. With Head First jQuery, you'll quickly get up to speed on this amazing JavaScript library by learning how to navigate HTML documents while handling events, effects, callbacks, and animations. By the time you've completed the book, you'll be incorporating Ajax apps, working seamlessly with HTML and CSS, and handling data with PHP, MySQL and JSON. If you want to learn-and understand-how to create interactive web pages, unobtrusive scrip

  6. Resonance in a head massager

    Science.gov (United States)

    Ribeiro, Jair Lúcio Prados

    2015-04-01

    Mechanical structures such as pendula, bridges, or buildings always exhibit one (or more) natural oscillation frequency.1 If that structure is subjected to oscillatory forces of this same frequency, resonance occurs, with consequent increase of the structure oscillation amplitude. There is no shortage of simple experiments for demonstrating resonance in high school classes using a variety of materials, such as saw blades,2 guitars,3 pendulums,4 wine glasses,5 bottles,6 Ping-Pong balls,7 and pearl strings.8 We present here an experimental demonstration using only an inexpensive head (or scalp) massager, which can be purchased for less than a dollar.

  7. Head movement during walking in the cat.

    Science.gov (United States)

    Zubair, Humza N; Beloozerova, Irina N; Sun, Hai; Marlinski, Vladimir

    2016-09-22

    Knowledge of how the head moves during locomotion is essential for understanding how locomotion is controlled by sensory systems of the head. We have analyzed head movements of the cat walking along a straight flat pathway in the darkness and light. We found that cats' head left-right translations, and roll and yaw rotations oscillated once per stride, while fore-aft and vertical translations, and pitch rotations oscillated twice. The head reached its highest vertical positions during second half of each forelimb swing, following maxima of the shoulder/trunk by 20-90°. Nose-up rotation followed head upward translation by another 40-90° delay. The peak-to-peak amplitude of vertical translation was ∼1.5cm and amplitude of pitch rotation was ∼3°. Amplitudes of lateral translation and roll rotation were ∼1cm and 1.5-3°, respectively. Overall, cats' heads were neutral in roll and 10-30° nose-down, maintaining horizontal semicircular canals and utriculi within 10° of the earth horizontal. The head longitudinal velocity was 0.5-1m/s, maximal upward and downward linear velocities were ∼0.05 and ∼0.1m/s, respectively, and maximal lateral velocity was ∼0.05m/s. Maximal velocities of head pitch rotation were 20-50°/s. During walking in light, cats stood 0.3-0.5cm taller and held their head 0.5-2cm higher than in darkness. Forward acceleration was 25-100% higher and peak-to-peak amplitude of head pitch oscillations was ∼20°/s larger. We concluded that, during walking, the head of the cat is held actively. Reflexes appear to play only a partial role in determining head movement, and vision might further diminish their role. PMID:27339731

  8. 20 September 2013 - Ambassador Z. Akram , Permanent Representative of the Islamic Republic of Pakistan to the United Nations Office and other international organisations in Geneva (3rd) with Mechanical and Materials Engineering Group Leader F. Bertinelli, Head of International Relations R. Voss, CMS Collaboration, Quaid-i-Azam University H. Hoorani, Permanent Mission First Secretary U. Iqbal Jadoon and LHC Consolidation, Industrial Services, Technology Department JP. Tock in front of the lift to the LHC tunnel at Point 1. Site Manager M. Décombaz on the back.

    CERN Multimedia

    Anna Pantelia

    2013-01-01

    20 September 2013 - Ambassador Z. Akram , Permanent Representative of the Islamic Republic of Pakistan to the United Nations Office and other international organisations in Geneva (3rd) with Mechanical and Materials Engineering Group Leader F. Bertinelli, Head of International Relations R. Voss, CMS Collaboration, Quaid-i-Azam University H. Hoorani, Permanent Mission First Secretary U. Iqbal Jadoon and LHC Consolidation, Industrial Services, Technology Department JP. Tock in front of the lift to the LHC tunnel at Point 1. Site Manager M. Décombaz on the back.

  9. SYNTHESIS OF POLY(VINYLIDENE FLUORIDE) WITH LOW CONTENTS OF HEAD-TO-HEAD CHAIN

    Institute of Scientific and Technical Information of China (English)

    DUAN Youlu; YU Xiuying; XUE Ying; ZENG Miaoying; JI Shanrong

    1983-01-01

    The relations between polymerization conditions of vinylidene fluorideand contents of head-to-head chain in the polymer have been studied. It shows that the contents of head-to-head chain of the polymer are related to its polymerization temperature, but are not related with the kinds of initiators used. Therefore, poly(vinylidene fluoride) with low contents of head-to-head chain (ca. 3%)can be prepared under lower polymerization temperature. Plot of the contents of A chains against melting points of the polymer is linear, which can be expressed by an equation:A = 24.8 + 0.362 Tm(%).

  10. Intense positron beams: linacs

    International Nuclear Information System (INIS)

    Beams of monoenergetic positrons with energies of a few eV to many keV have been used in experiments in atomic physics, solid-state physics and materials science. The production of positron beams from a new source, an electron linac, is described. Intense, pulsed beams of low-energy positrons were produced by a high-energy beam from an electron linac. The production efficiency, moderator geometry, beam spot size and other positron beam parameters were determined for electrons with energies from 60 to 120 MeV. Low-energy positron beams produced with a high-energy electron linac can be of much higher intensity than those beams currently derived from radioactive sources. These higher intensity beams will make possible positron experiments previously infeasible. 10 references, 1 figure

  11. A Pre-Hispanic Head

    Science.gov (United States)

    Bianucci, Raffaella; Jeziorska, Maria; Lallo, Rudy; Mattutino, Grazia; Massimelli, Massimo; Phillips, Genevieve; Appenzeller, Otto

    2008-01-01

    This report on a male head revealed biologic rhythms, as gleaned from hydrogen isotope ratios in hair, consistent with a South-American origin and Atomic Mass Spectrometry radiocarbon dating (AMS) compatible with the last pre-Hispanic period (1418–1491 AD, 95.4% probability). Biopsies showed exceptionally well-preserved tissues. The hair contained high levels of toxic elements (lead, arsenic and mercury) incompatible with life. There was no evidence for lead deposition in bone consistent with post-mortem accumulation of this toxic element in the hair. We propose that the high content of metals in hair was the result of metabolic activity of bacteria leading to metal complexation in extra cellular polymeric substances (EPS). This is a recognized protective mechanism for bacteria that thrive in toxic environments. This mechanism may account for the tissues preservation and gives a hint at soil composition where the head was presumably buried. Our results have implications for forensic toxicology which has, hitherto, relied on hair analyses as one means to reconstruct pre-mortem metabolism and for detecting toxic elements accumulated during life. Our finding also has implications for other archaeological specimens where similar circumstances may distort the results of toxicological studies. PMID:18446229

  12. Intention tremor after head injury

    International Nuclear Information System (INIS)

    Eight cases of intention tremor as a late complication of head injury were investigated. The patients ranged in age from 3 to 24 years. All received severe head injuries and lapsed into coma immediately afterward (Glasgow Coma Scale scores ≤8). Six patients exhibited decerebration or decortication. Hemiparesis was present in six cases and oculomotor nerve palsy in four. In the chronic stage, all patients displayed some degree of impairment of higher cortical function and five had dysarthria and/or ataxia. Initial computed tomography (CT) scans within 3 hours after the injury were obtained in five cases, of which four showed a hemorrhagic lesion in the midbrain or its surroundings. Other CT findings were diffuse cerebral swelling (four cases), intraventricular hemorrhage (three), and multiple hemorrhagic lesions (two). In the chronic stage, generalized cortical atrophy or ventricular enlargement was noted in five cases. These clinical features and CT findings indicate diffuse brain damage as well as midbrain damage and may reflect shearing injury. (author)

  13. Anatomy of the infant head

    International Nuclear Information System (INIS)

    This text is mainly an atlas of illustration representing the dissection of the head and upper neck of the infant. It was prepared by the author over a 20-year period. The commentary compares the anatomy of the near-term infant with that of a younger fetus, child, and adult. As the author indicates, the dearth of anatomic information about postnatal anatomic changes represents a considerable handicap to those imaging infants. In part 1 of the book, anatomy is related to physiologic performance involving the pharynx, larynx, and mouth. Sequential topics involve the regional anatomy of the head (excluding the brain), the skeleton of the cranium, the nose, orbit, mouth, larynx, pharynx, and ear. To facilitate use of this text as a reference, the illustrations and text on individual organs are considered separately (i.e., the nose, the orbit, the eye, the mouth, the larynx, the pharynx, and the ear). Each part concerned with a separate organ includes materials from the regional illustrations contained in part 2 and from the skeleton, which is treated in part 3. Also included in a summary of the embryologic and fetal development of the organ

  14. Department Summary

    OpenAIRE

    2001-01-01

    The Department of Meteorology was founded in 1946 and throughout its history has had one of the leading meteorology programs in the country. The objective of the curricula is to provide students with a sound understanding of the science of meteorology and to develop the technical expertise to provide and utilize meteorological data and models in support of all aspects of weather-department operations.

  15. Head and neck position sense.

    Science.gov (United States)

    Armstrong, Bridget; McNair, Peter; Taylor, Denise

    2008-01-01

    Traumatic minor cervical strains are common place in high-impact sports (e.g. tackling) and premature degenerative changes have been documented in sports people exposed to recurrent impact trauma (e.g. scrummaging in rugby) or repetitive forces (e.g. Formula 1 racing drivers, jockeys). While proprioceptive exercises have been an integral part of rehabilitation of injuries in the lower limb, they have not featured as prominently in the treatment of cervical injuries. However, head and neck position sense (HNPS) testing and re-training may have relevance in the management of minor sports-related neck injuries, and play a role in reducing the incidence of ongoing pain and problems with function. For efficacious programmes to be developed and tested, fundamental principles associated with proprioception in the cervical spine should be considered. Hence, this article highlights the importance of anatomical structures in the cervical spine responsible for position sense, and how their interaction with the CNS affects our ability to plan and execute effective purposeful movements. This article includes a review of studies examining position sense in subjects with and without pathology and describes the effects of rehabilitation programmes that have sought to improve position sense. In respect to the receptors providing proprioceptive information for the CNS, the high densities and complex arrays of spindles found in cervical muscles suggest that these receptors play a key role. There is some evidence suggesting that ensemble encoding of discharge patterns from muscle spindles is relayed to the CNS and that a pattern recognition system is used to establish joint position and movement. Sensory information from neck proprioceptive receptors is processed in tandem with information from the vestibular system. There are extensive anatomical connections between neck proprioceptive inputs and vestibular inputs. If positional information from the vestibular system is inaccurate or

  16. A customized head and neck support system

    International Nuclear Information System (INIS)

    Purpose: To describe a customized head and neck immobilization system for patients receiving radiotherapy including a head support that conforms to the posterior contour of the head and neck. Methods: The system includes a customized headrest to support the posterior head and neck. This is fixed to a thermoplastic face mask that molds to the anterior head/face contours. The shape of these customized head and neck supports were compared to 'standard' supports. Results: This system is comfortable for the patients and appears to be effective in reproducing the setup of the treatment. Conclusions: The variability in the size and shape of the customized posterior supports exceeded that of 'standard' headrests. It is our clinical impression that the customized supports improve reproducibility and are now a standard part of our immobilization system. The quantitative analysis of the customized headrests and some commonly used 'standard' headrests suggests that the customized supports are better able to address variabilities in patient shape

  17. A direction-selective flattening filter for clinical photon beams. Monte Carlo evaluation of a new concept

    International Nuclear Information System (INIS)

    A new concept for the design of flattening filters applied in the generation of 6 and 15 MV photon beams by clinical linear accelerators is evaluated by Monte Carlo simulation. The beam head of the Siemens Primus accelerator has been taken as the starting point for the study of the conceived beam head modifications. The direction-selective filter (DSF) system developed in this work is midway between the classical flattening filter (FF) by which homogeneous transversal dose profiles have been established, and the flattening filter-free (FFF) design, by which advantages such as increased dose rate and reduced production of leakage photons and photoneutrons per Gy in the irradiated region have been achieved, whereas dose profile flatness was abandoned. The DSF concept is based on the selective attenuation of bremsstrahlung photons depending on their direction of emission from the bremsstrahlung target, accomplished by means of newly designed small conical filters arranged close to the target. This results in the capture of large-angle scattered Compton photons from the filter in the primary collimator. Beam flatness has been obtained up to any field cross section which does not exceed a circle of 15 cm diameter at 100 cm focal distance, such as 10 x 10 cm2, 4 x 14.5 cm2 or less. This flatness offers simplicity of dosimetric verifications, online controls and plausibility estimates of the dose to the target volume. The concept can be utilized when the application of small- and medium-sized homogeneous fields is sufficient, e.g. in the treatment of prostate, brain, salivary gland, larynx and pharynx as well as pediatric tumors and for cranial or extracranial stereotactic treatments. Significant dose rate enhancement has been achieved compared with the FF system, with enhancement factors 1.67 (DSF) and 2.08 (FFF) for 6 MV, and 2.54 (DSF) and 3.96 (FFF) for 15 MV. Shortening the delivery time per fraction matters with regard to workflow in a radiotherapy department

  18. Department of Material Studies - Overview

    International Nuclear Information System (INIS)

    Full text: The technology of modifying surfaces of practical-use materials by means of continuous and pulsed energy and particle beams has been intensely studied for more than 20 years. In some fields it is presently utilized on a wide scale in industry. Continuous or pulsed ion and plasma beams play a significant role among various approaches used in this area. The research carried at by Department P-IX is centered around the use of two ion implantation machines (ion implanters) of different kinds and several unique sources of high-intensity intense plasma pulses, utilized jointly with Department P-V. The Department cooperates with Forschungszentrum Rossendorf (FZR, Dresden, Germany) in the field of ion-beam-based analytical techniques and the use of ion implantation facilities. The main objectives of the Department are: - A search for new ways of modifying the surface properties of solid materials by means of continuous or pulsed ion and plasma beams and - implementation of ion implantation techniques in national industries as a method of improving the lifetime of machine parts and tools utilized in industry. In 2004 these objectives were being accomplished in many ways, particularly by research on: - interaction of nitrogen atoms in expanded austenite formed in pure iron, - formation of superconducting MgB2 phases - surface layer modification of ion-bombarded HDPE, - nanolayers in AlN for direct bonding with copper, - surface alloying of titanium with nickel and palladium for increased corrosion resistance, - nanolayers in alloys and ceramic coatings for improved resistance to high-temperature corrosion, - improvement of cutting tools lifetime by means of nitrogen implantation. The research was conducted in cooperation with Department P-V of IPJ, Institute of Nuclear Chemistry and Technology (Warsaw), Warsaw University of Technology, Institute of Technology of Materials for Electronics (Warsaw), Forschungszentrum Rossendorf FZR (Dresden, Germany), as well as

  19. Fusobacterial head and neck infections in children.

    Science.gov (United States)

    Brook, Itzhak

    2015-07-01

    Fusobacterium species are increasingly recognized as a cause of head and neck infections in children. These infections include acute and chronic otitis, sinusitis, mastoiditis, and tonsillitis; peritonsillar and retropharyngeal abscesses; Lemierre syndrome; post-anginal cervical lymphadenitis; and periodontitis. They can also be involved in brain abscess and bacteremia associated with head and neck infections. This review describes the clinical spectrum of head and neck fusobacterial infection in children and their management. PMID:25980688

  20. Neuropsychological evaluation of mild head injury.

    OpenAIRE

    Gentilini, M; Nichelli, P; Schoenhuber, R; Bortolotti, P.; Tonelli, L; Falasca, A; Merli, G A

    1985-01-01

    Neuropsychological deficits following mild head injury have been reported recently in the literature. The purpose of this study was to investigate this issue with a strict methodological approach. The neuropsychological performance of 50 mildly head injured patients was compared with that of 50 normal controls chosen with the case-control approach. No conclusive evidence was found that mild head injury causes cognitive impairment one month after the trauma.

  1. Tridimensional pose estimation of a person head

    International Nuclear Information System (INIS)

    In this work, we present a method for estimating 3-D motion parameters; this method provides an alternative way for 3D head pose estimation from image sequence in the current computer vision literature. This method is robust over extended sequences and large head motions and accurately extracts the orientation angles of head from a single view. Experimental results show that this tracking system works well for development a human-computer interface for people that possess severe motor incapacity

  2. Remediation of attention deficits in head injury.

    OpenAIRE

    Nag S; Rao S

    1999-01-01

    Head injury is associated with psychological sequelae which impair the patient′s psychosocial functioning. Information processing, attention and memory deficits are seen in head injuries of all severity. We attempted to improve deficits of focused, sustained and divided attention. The principle of overlapping sources of attention resource pools was utilised in devising the remediation programme. Tasks used simple inexpensive materials. Four head injured young adult males with post conc...

  3. Department of Accelerator Physics and Technology: Overview

    International Nuclear Information System (INIS)

    Full text:Due to financial shortages, the Extensive Research Program ''Isotopes and Accelerators'' did not come into effect. This in consequence limited the scope of new design and construction works. As the most important topic remained the continuation of work on Ordered Project for new therapeutical accelerator ''6/15''. It has to be emphasized that during realization of this task, several significant modifications were introduced to get a final solution better matched to future implementation of the prototype. The initially adopted ''classical'' solution of accelerating structure with separate bunching and accelerating sections, was replaced by a single mechanical unit with both incorporated functional subsystems. This solution is more convenient for future production and servicing, but in order to cover the broad range of energy variation is was necessary to recalculate the beam dynamics and to find the method for internal phase correction. Another important feature was an additional design of two possible injection systems, the first with a diode gun for 40 keV energy, and the second one with triode gun 15-20 keV. These solutions provide a contingency for - two production versions of an accelerator equipped with different RF power systems - klystron or magnetron. Substantial effort was directed to completion and operation of an experimental facility for testing accelerating structures. This facility is equipped with a RF high - power source in the form of 6 MW klystron, and high-vacuum pumping system. External apparatus connected to the facility are - magnetic spectrometer and computerized water phantom, which enable the diagnostics of accelerated electron beam. Several structure models were tested, and for the first time an electron energy in the vicinity of 15 MeV was registered. Other important subjects in (he Department's activity were: * Implementation of new versions of MC codes, for analysis of electron and photon beams distribution at the output of

  4. Research on genetics of rice heading date

    Institute of Scientific and Technical Information of China (English)

    2002-01-01

    Heading date is one of the most important traits for rice adaptation to cultivation area and crop seasons, and it is mainly determined by photoperiod, basic vegetative growth, and temperature of cultivars. The diversity of combinations of photo-sensitive varieties and the basic vegetative, makes the heading date varied. On one hand, this supplies abundant resources for different ecotypes breeding; on the other hand, it complicates the inheritance of heading date. In recent years, transgression of late maturity has often been encountered, especially between indica and japonica subspecies, this had inhabited the use of hybrid vigor. Therefore, understanding the inheritance basis of heading date is very important for breeding practices.

  5. Bilateral internuclear ophthalmoplegia following mild head injury.

    Science.gov (United States)

    Muthukumar, N; Veerarajkumar, N; Madeswaran, K

    2001-05-01

    A 7-year-old child presented with bilateral internuclear ophthalmoplegia (INO) following a trivial head injury. CT was normal. MRI revealed a pontine lesion. Two months after the injury the patient was neurologically normal. INO following head injury is rare. Rarer still is INO following mild head injury. To date, only four cases of INO had been reported following mild head injury; the present case is the fifth and the first in which the lesion was documented using MRI. The relevant literature is reviewed. PMID:11417420

  6. Posture of the head and pharyngeal swallowing

    International Nuclear Information System (INIS)

    Closure of the laryngeal vestibule during swallowing is important for protection of the airways. The present investigation included 53 patients with dysphagia examined cineradiographically with the head held in resting posture, flexion and extension. The ability to protect the airways by the downward movement of the epiglottis and by obliteration of the laryngeal vestibule was studied in different postures of the head. Of 35 patients with normal laryngeal obliteration with the head in resting position 10 showed a defective closure at swallowing in extension. In 18 patients with defective closure of the laryngeal vestibule in resting position 9 were improved on flexion and two on extension of the head. In one patient with defectie closure of the laryngeal vestibule in resting position swallowing in flexion showed an aggravated dysfunction. In our other patients the defective closure became more marked on extension. Four patients had less effective downward movement of the epiglottis with the head in extension. Of 10 patients with defective epiglottic movement with the head in resting position two were improved on tilting the head forwards. The results show that the position of the head influences the closure of the airways during swallowing. Patients with defective protection of the laryngeal vestibule should be instructed to swallow with the head tilted forwards. (orig.)

  7. Beam Dynamics and Beam Losses - Circular Machines

    CERN Document Server

    Kain, V

    2016-01-01

    A basic introduction to transverse and longitudinal beam dynamics as well as the most relevant beam loss mechanisms in circular machines will be presented in this lecture. This lecture is intended for physicists and engineers with little or no knowledge of this subject.

  8. Electron beam instabilities in gyrotron beam tunnels

    International Nuclear Information System (INIS)

    Electron beam instabilities occurring in a gyrotron electron beam can induce an energy spread which might significantly deteriorate the gyrotron efficiency. Three types of instabilities are considered to explain the important discrepancy found between the theoretical and experimental efficiency in the case of quasi-optical gyrotrons (QOG): the electron cyclotron maser instability, the Bernstein instability and the Langmuir instability. The low magnetic field gradient in drift tubes of QOG makes that the electron cyclotron maser instability can develop in the drift tube at very low electron beam currents. Experimental measurements show that with a proper choice of absorbing structures in the beam tunnel, this instability can be suppressed. At high beam currents, the electrostatic Bernstein instability can induce a significant energy spread at the entrance of the interaction region. The induced energy spread scales approximately linearly with the electron beam density and for QOG one observes that the beam density is significantly higher than the beam density of an equivalent cylindrical cavity gyrotron. (author) figs., tabs., refs

  9. Beam-beam issues in asymmetric colliders

    Energy Technology Data Exchange (ETDEWEB)

    Furman, M.A.

    1992-07-01

    We discuss generic beam-beam issues for proposed asymmetric e{sup +}- e{sup -} colliders. We illustrate the issues by choosing, as examples, the proposals by Cornell University (CESR-B), KEK, and SLAC/LBL/LLNL (PEP-II).

  10. Department of Plasma Physics and Technology - Overview

    International Nuclear Information System (INIS)

    Full text: The activities of the Department in 2007 continued previous studies in the following fields of plasma physics, controlled nuclear fusion and plasma technology of surface engineering: · Studies of physical phenomena in pulsed discharges in the Plasma-Focus (PF) and RPI-IBIS facilities; · Development of selected methods for high-temperature plasma diagnostics; · Research on plasma technologies; · Selected problems of plasma theory and computational modelling. As for the experimental studies particular attention was paid to the analysis of the correlation of X-ray pulses with pulsed electron beams and other corpuscular emissions from different Plasma-Focus (PF) facilities. A collisional-radiative model, taking into account the Stark effect and strong electric fields in the so called '' hot- spot '' regions of a pinch, was applied in those analyses. The main aim of these studies was to identify the physical phenomena responsible for the emission during the PF-type discharges. The emitted protons were also measured with nuclear track detectors. The measurements made it possible to obtain images of the regions, where the D-D fusion reactions occurred, as well as to determine the angular distribution of the emitted protons. Pulsed plasma streams were also investigated by means of time-resolved optical spectroscopy and corpuscular diagnostics. In a frame of the EURATOM program, efforts were devoted to the development of diagnostic methods for tokamak-type facilities. Such studies include the design and construction of the 4-channel Cherenkov-type detection system for the TORE-SUPRA tokamak at CEA-Cadarache. In the meantime in order to collect some experience a new measuring head was especially prepared for experiments within small facilities. Other fusion- oriented efforts are connected with the application of the solid-state nuclear track detectors for investigation of protons from tokamak plasma and high-energy beams emitted from laser produced plasmas

  11. Get a head in telepresence: active vision for remote intervention

    International Nuclear Information System (INIS)

    Despite advances in robotic systems, many tasks needing to be undertaken in hazardous environments require human control. The risk to human life can be reduced or minimised using an integrated control system comprising an active controllable stereo vision system and a virtual reality head-mounted display. The human operator is then immersed in and can interact with the remote environment in complete safety. An overview is presented of the design and development of just such an advanced, dynamic telepresence system, developed at the Department of Mechanical Engineering at the University of Surrey. (UK)

  12. Femoral head allograft disinfection system using moderate heat

    International Nuclear Information System (INIS)

    minimum of 80 degree C is reached for a minimum of 10 minutes in the femoral head center, with a peak temperature of 87 degree C. Three highly relevant viruses were tested at independent research centers using the Lobator sd-1: HIV- 1, BVDV (specific model virus for HCV), and CPV (specific model virus for parvovirus B1 9 and thermal model virus for HBV). The reduction steps (log10) were: HIV:>8.5+/-0.3, BVDV: >5.21+/-0.25, CPV.>5.87+/-0.29. The kinetics of inactivation curves for all three viruses indicated that the disinfection process was robust and effective; no viruses were detectable after 62 minutes of the 94 minutes process. A microbiological study performed on 2,458 consecutive femoral head allografts found a primary contamination rate of 9% for femoral heads recovered under intra-operative conditions. After processing with the disinfection system bacterial retesting of these same heads revealed a contamination rate of 0.12%; these secondary post-processing contaminations were due to the lab technical leaming curve. Since 1993, orthopaedic and trauma departments in more than 300 hospitals in Europe and Asia are using the Lobator Marburg Bone Bank System for in-house processing of their surgical femoral head allografts. More than 35,000 femoral heads have been processed. A prospective clinical trial is in progress at the Marburg University Hospital trauma center (Germany). Preliminary one year results on 211 patients indicate that the complication rate is not higher than those reported in the literature using untreated cryopreserved cancellous bone allografts

  13. A situational analysis of child-headed households in South Africa

    Directory of Open Access Journals (Sweden)

    S. M. Mogotlane

    2010-06-01

    Full Text Available The aftermath of the HIV and AIDS pandemic has resulted in great suffering in terms of loss of income, poor quality of life, morbidity and mortality, with children being destitute and orphaned at an alarming rapid rate. Families and communities are currently unable to cope with the effects of HIV and AIDS with special emphasis on the care and support of the affected orphans and vulnerable children, who as a result have been compelled to look after themselves giving rise to a new type of family, the child-headed household. The emergence of this type of family requires government’s response in terms of care and support. The purpose of this study was to provide a broad picture of the location, prevalence, composition, functions, needs and challenges of child-headed households in South Africa, and explore available and required services, resources and safety nets for children in child-headed households. An exploratory and descriptive design was used for the purpose. The sample consisted of children heading households and those living in the households that are headed by children; government departments responsible for child welfare, such as, the Departments of Social Development, Health, Education and Agriculture; non-profit organisations and communities where these households are predominant. From the data collected, it was found that the rights of the affected children were compromised. Those heading the households were often not at school and were responsible for domestic chores. The households needed food, clothes, money, shelter, and education. Government in attempting to address these needs required clear policies which will provide a distinction between orphaned and vulnerable children and child-headed households.The study recommended a collaborative approach as it was shown that there was no single model of best practice to appropriately and effectively address the needs of child-headed households.

  14. A situational analysis of child-headed households in South Africa

    Directory of Open Access Journals (Sweden)

    S.M. Mogotlane

    2009-09-01

    Full Text Available The aftermath of the HIV and AIDS pandemic has resulted in great suffering in terms of loss of income, poor quality of life, morbidity and mortality, with children being destitute and orphaned at an alarming rapid rate. Families and communities are currently unable to cope with the effects of HIV and AIDS with special emphasis on the care and support of the affected orphans and vulnerable children, who as a result have been compelled to look after themselves giving rise to a new type of family, the child-headed household. The emergence of this type of family requires government’s response in terms of care and support. The purpose of this study was to provide a broad picture of the location, prevalence, composition, functions, needs and challenges of child-headed households in South Africa, and explore available and required services, resources and safety nets for children in child-headed households. An exploratory and descriptive design was used for the purpose. The sample consisted of children heading households and those living in the households that are headed by children; government departments responsible for child welfare, such as, the Departments of Social Development, Health, Education and Agriculture; non-profit organisations and communities where these households are predominant.From the data collected, it was found that the rights of the affected children were compromised. Those heading the households were often not at school and were responsible for domestic chores. The households needed food, clothes, money, shelter, and education. Government in attempting to address these needs required clear policies which will provide a distinction between orphaned and vulnerable children and child-headed households.The study recommended a collaborative approach as it was shown that there was no single model of best practice to appropriately and effectively address the needs of child-headed households.

  15. 2010 Cape Canaveral, Florida Single-beam Bathymetry Data

    Data.gov (United States)

    U.S. Geological Survey, Department of the Interior — Single-beam bathymetric surveys were conducted on July 27-29, 2010 along 37 cross-shore transects offshore from Cape Canaveral, Fla. The transects were spaced 500...

  16. Current use of intraosseous infusion in Danish emergency departments

    DEFF Research Database (Denmark)

    Molin, Rune; Hallas, Peter; Brabrand, Mikkel;

    2010-01-01

    BACKGROUND: Intraosseous infusion (IOI) is recommended when intravenous access cannot be readily established in both pediatric and adult resuscitation. We evaluated the current use of IOI in Danish emergency departments (EDs). METHODS: An online questionnaire was e-mailed to the Heads of Department...

  17. Head injuries: a study evaluating the impact of the NICE head injury guidelines

    OpenAIRE

    Z. Hassan; Smith, M.; Littlewood, S; Bouamra, O; Hughes, D.; Biggin, C; Amos, K.; Mendelow, A; Lecky, F

    2005-01-01

    Background: The NICE head injury guidelines recommend a different approach in the management of head injury patients. It suggests that CT head scan should replace skull x ray (SXR) and observation/admission as the first investigation. We wished to determine the impact of NICE on SXR, CT scan, and admission on all patients with head injury presenting to the ED setting and estimate the cost effectiveness of these guidelines, which has not been quantified to date.

  18. Systematic analysis of head-to-head gene organization: evolutionary conservation and potential biological relevance.

    Directory of Open Access Journals (Sweden)

    Yuan-Yuan Li

    2006-07-01

    Full Text Available Several "head-to-head" (or "bidirectional" gene pairs have been studied in individual experiments, but genome-wide analysis of this gene organization, especially in terms of transcriptional correlation and functional association, is still insufficient. We conducted a systematic investigation of head-to-head gene organization focusing on structural features, evolutionary conservation, expression correlation and functional association. Of the present 1,262, 1,071, and 491 head-to-head pairs identified in human, mouse, and rat genomes, respectively, pairs with 1- to 400-base pair distance between transcription start sites form the majority (62.36%, 64.15%, and 55.19% for human, mouse, and rat,respectively of each dataset, and the largest group is always the one with a transcription start site distance of 101 to 200 base pairs. The phylogenetic analysis among Fugu, chicken, and human indicates a negative selection on the separation of head-to-head genes across vertebrate evolution, and thus the ancestral existence of this gene organization. The expression analysis shows that most of the human head-to-head genes are significantly correlated,and the correlation could be positive, negative, or alternative depending on the experimental conditions. Finally, head to-head genes statistically tend to perform similar functions, and gene pairs associated with the significant cofunctions seem to have stronger expression correlations. The findings indicate that the head-to-head gene organization is ancient and conserved, which subjects functionally related genes to correlated transcriptional regulation and thus provides an exquisite mechanism of transcriptional regulation based on gene organization. These results have significantly expanded the knowledge about head-to-head gene organization. Supplementary materials for this study are available at http://www.scbit.org/h2h.

  19. 21 CFR 892.5780 - Light beam patient position indicator.

    Science.gov (United States)

    2010-04-01

    ... 21 Food and Drugs 8 2010-04-01 2010-04-01 false Light beam patient position indicator. 892.5780 Section 892.5780 Food and Drugs FOOD AND DRUG ADMINISTRATION, DEPARTMENT OF HEALTH AND HUMAN SERVICES (CONTINUED) MEDICAL DEVICES RADIOLOGY DEVICES Therapeutic Devices § 892.5780 Light beam patient...

  20. Beam Loss in Linacs

    CERN Document Server

    Plum, M A

    2016-01-01

    Beam loss is a critical issue in high-intensity accelerators, and much effort is expended during both the design and operation phases to minimize the loss and to keep it to manageable levels. As new accelerators become ever more powerful, beam loss becomes even more critical. Linacs for H- ion beams, such as the one at the Oak Ridge Spallation Neutron Source, have many more loss mechanisms compared to H+ (proton) linacs, such as the one being designed for the European Spallation Neutron Source. Interesting H- beam loss mechanisms include residual gas stripping, H+ capture and acceleration, field stripping, black-body radiation and the recently discovered intra-beam stripping mechanism. Beam halo formation, and ion source or RF turn on/off transients, are examples of beam loss mechanisms that are common for both H+ and H- accelerators. Machine protection systems play an important role in limiting the beam loss.

  1. Mechanically reinforced glass beams

    DEFF Research Database (Denmark)

    Nielsen, Jens Henrik; Olesen, John Forbes

    2007-01-01

    breakage without any warning or ductility, which can be catastrophic if no precautions are taken. One aspect of this issue is treated here by looking at the possibility of mechanically reinforcing glass beams in order to obtain ductile failure for such a structural component. A mechanically reinforced...... laminated float glass beam is constructed and tested in four-point bending. The beam consist of 4 layers of glass laminated together with a slack steel band glued onto the bottom face of the beam. The glass parts of the tested beams are \\SI{1700}{mm} long and \\SI{100}{mm} high, and the total width of one...... beam is \\SI{4\\times10}{mm}. It is reinforced with a \\SI{3}{mm} high steel band covering the full width of the beam. The experimental setup is described and results for this beam are presented. Furthermore, the results for three similar experiments with a \\SI{6}{mm} steel band reinforcement are briefly...

  2. Space charge dominated beams

    International Nuclear Information System (INIS)

    After an introductory section on the relationship between emittance and beam Coulomb energy we discuss the properties of space charge dominated beams in progressive steps: from uniformly charged bunched beams to non-uniformly charged beams to correlation effects between particles (simulation beams or 'crystalline' beams). A practical application can be found in the beam dynamics of a high-current injector. The concept of correlation energy is of practical interest in computer simulation of high-brilliance beams, where one deals with an artificially enhanced two-particle Coulomb energy, if many real particles are combined into one simulation super-particle. This can be a source of non-physical emittance growth. (orig./HSI)

  3. Laser-Beam Separator

    Science.gov (United States)

    Mcdermid, I. S.

    1984-01-01

    Train of prisms and optical stop separate fundamental beam of laser from second and higher order harmonics of beam produced in certain crystals and by stimulated Raman scattering in gases and liquids.

  4. CT of the neonatal head

    International Nuclear Information System (INIS)

    Computed tomography (CT) is used less often than other techniques on neonatal units. However, in the acute setting, CT can be invaluable in diagnosing or excluding potentially life-threatening conditions and guiding initial management in neonates. Common indications for scanning include trauma, suspected non-accidental injury, infection, or an acute hypoxic or metabolic event. The aim of this review is to provide an overview of the normal neonatal head at CT and compare this to the common pathological abnormalities. Several key features of each condition will be highlighted. It is important to note that some pathological conditions can have overlapping features at CT and, therefore, the clinical history and additional investigations are also of key importance in determining the diagnosis

  5. Head First WordPress

    CERN Document Server

    Siarto, Jeff

    2010-01-01

    Whether you're promoting your business or writing about your travel adventures, Head First WordPress will teach you not only how to make your blog look unique and attention-grabbing, but also how to dig into the more complex features of WordPress 3.0 to make your website work well, too. You'll learn how to move beyond the standard WordPress look and feel by customizing your blog with your own URL, templates, plugin functionality, and more. As you learn, you'll be working with real WordPress files: The book's website provides pre-fab WordPress themes to download and work with as you follow al

  6. Reactor vessel lower head integrity

    Energy Technology Data Exchange (ETDEWEB)

    Rubin, A.M.

    1997-02-01

    On March 28, 1979, the Three Mile Island Unit 2 (TMI-2) nuclear power plant underwent a prolonged small break loss-of-coolant accident that resulted in severe damage to the reactor core. Post-accident examinations of the TMI-2 reactor core and lower plenum found that approximately 19,000 kg (19 metric tons) of molten material had relocated onto the lower head of the reactor vessel. Results of the OECD TMI-2 Vessel Investigation Project concluded that a localized hot spot of approximately 1 meter diameter had existed on the lower head. The maximum temperature on the inner surface of the reactor pressure vessel (RPV) in this region reached 1100{degrees}C and remained at that temperature for approximately 30 minutes before cooling occurred. Even under the combined loads of high temperature and high primary system pressure, the TMI-2 RPV did not fail. (i.e. The pressure varied from about 8.5 to 15 MPa during the four-hour period following the relocation of melt to the lower plenum.) Analyses of RPV failure under these conditions, using state-of-the-art computer codes, predicted that the RPV should have failed via local or global creep rupture. However, the vessel did not fail; and it has been hypothesized that rapid cooling of the debris and the vessel wall by water that was present in the lower plenum played an important role in maintaining RPV integrity during the accident. Although the exact mechanism(s) of how such cooling occurs is not known, it has been speculated that cooling in a small gap between the RPV wall and the crust, and/or in cracks within the debris itself, could result in sufficient cooling to maintain RPV integrity. Experimental data are needed to provide the basis to better understand these phenomena and improve models of RPV failure in severe accident codes.

  7. 3rd February 2011-Science Museum Patrons-Kingdom of Great Britain and Northern Ireland-visiting CMS cavern and LHC Tunnel with A. De Roeck,CMS Collaboration Deputy Spokesperson and M. Lamont,Beams Department, Operation Group Leader

    CERN Multimedia

    Maximilien Brice

    2011-01-01

    The delegation: Mr Ian Blatchford,Director of the Science Museum and NMSI Mrs Susan Fisher,Director of Development, National Museum of Science and Industry (NMSI) Dr Douglas Gurr,Chairman of the Board of Trustees, NMSI Mr Martin Smith,Previous NMSI trustee Mrs Elise Smith,Spouse Mr Michael Wilson,NMSI trustee Mrs Jane Wilson,Spouse Mr Gregg Wilson,Son Dr Ann Coxon,UK Friends of the Science Museum Trustee Mr Nicholas Lewis,Contact of Martin Smith accompanied by P. Wells,Physics Department, ATLAS Inner Detector Group Leader and A. Koek,Communication group (International Arts Development, CERN Cultural Policy and Strategy with the Arts, The Collide Programme)

  8. Application of doctor-nurse-patient integration mode in quality nursing in department of head and neck cancer%医护患一体化模式在头颈肿瘤病房优质护理服务中的应用

    Institute of Scientific and Technical Information of China (English)

    肖丽平; 陈世容; 黄敏; 王国蓉; 杨青

    2013-01-01

    Objective To study the effect of doctor-nurse-patient integration mode in quality nursing in department of head and neck cancer.Methods Doctor-nurse-patient integration mode was established and implemented from July 2011 to June 2012,and doctor-nurse ward visits,health education pathway,process reengineering and health care cooperation in clinical research were conducted.Doctors' knowledge of nursing,nurses' knowledge of therapeutic schedule,nurses' interests in scientific research and grasp of methods,patients' knowledge of health education and satisfaction were compared before and after doctor-nurse-patient integration mode.Results Doctors' knowledge of nursing,nurses' knowledge of therapeutic schedule and patients' satisfaction were respectively 80.0%,85.0% and 87.5 before the implementation of doctor-nursepatient integration mode,and increased to 100.0%,99.0% and 95.8% after,with statistically significantdifferences (x2 =8.720,15.231,4.364,respectively; P < 0.05).Nurses' interests in scientific research,grasp of literature consulting methods and paper writing methods were respectively 100.0%,100.0% and 75.0% after doctor-nurse-patient integration mode,all of which were higher than before (35.0%,35.0% and 35.0%),and the differences were statistically significant (x2 =19.259,19.259,6.465,respectively; P <0.05).Conclusions Implementation of doctor-nurse-patient integration mode can promote doctor-nurse communication,improve patients' satisfaction and knowledge of health education,advance nurses' grasp of research knowledge,boost their interests in scientific research,enhance nursing quality and deepen the connotation of quality nursing.%目的 探讨医护患一体化模式在头颈肿瘤病房优质护理服务中的应用效果.方法 2011年7月至2012年6月构建并实施医护患一体化模式,进行医护联合查房,健康教育路径,流程再造,临床科研医护合作;2010年7月至2011年6月未实施医护患一体化模

  9. External proton and Li beams

    International Nuclear Information System (INIS)

    In the frame of a feasibility study to introduce proton therapy in Argentina in a collaborative agreement between the Physics and Radiobiology Departments of the National Atomic Energy Commission or Argentina and the Centre de Protontherapie de Orsay, France, external proton and Li beams were produced at the TANDAR accelerator in Buenos Aires. The specific aim of this work was to start radiobiology studies on cell cultures and small laboratory animals. In particular we seek to determine here the relative biological effectiveness, RBE, for proton and Li beams as a function of energy for different tumor and normal cell lines. The 24 MeV proton beam was diffused using a 25 μm gold foil and extracted through a Kapton window to obtain a homogeneous field (constant to 95%) of about 7 cm in diameter. Measurements were carried out with quasi-monoenergetic beams (of 20.2 ± 0.07 MeV, 2.9 ± 0.10 MeV y 1.5 ± 0.1 MeV for protons and 21.4 ± 0.4 MeV for Lithium). Proton fluence and Bragg peaks were measured. The dose delivered in each case was monitored on-line with a calibrated transmission ionization chamber. Three cell lines PDV, PDVC 57 and V 79 (as a reference) were irradiated with γ-rays, proton and lithium beams with linear energy transfer (LET) from 2 to 100 keV/μm. RBE values in the range of 1.2-5.9 were obtained. In addition preliminary studies on chromosomal aberrations and viability of alveolar macrophages were carried out. (author)

  10. PARTICLE BEAM TRACKING CIRCUIT

    Science.gov (United States)

    Anderson, O.A.

    1959-05-01

    >A particle-beam tracking and correcting circuit is described. Beam induction electrodes are placed on either side of the beam, and potentials induced by the beam are compared in a voltage comparator or discriminator. This comparison produces an error signal which modifies the fm curve at the voltage applied to the drift tube, thereby returning the orbit to the preferred position. The arrangement serves also to synchronize accelerating frequency and magnetic field growth. (T.R.H.)

  11. Beam Dynamics for ARIA

    Energy Technology Data Exchange (ETDEWEB)

    Ekdahl, Carl August Jr. [Los Alamos National Lab. (LANL), Los Alamos, NM (United States)

    2014-10-14

    Beam dynamics issues are assessed for a new linear induction electron accelerator being designed for flash radiography of large explosively driven hydrodynamic experiments. Special attention is paid to equilibrium beam transport, possible emittance growth, and beam stability. It is concluded that a radiographic quality beam will be produced possible if engineering standards and construction details are equivalent to those on the present radiography accelerators at Los Alamos.

  12. Slow kaon beams

    International Nuclear Information System (INIS)

    A short description is given of considerations for the design of low-momentum kaon beam lines. Relevant data for the performance of seven existing and decommissioned slow kaon beams are presented. For single-stage separated beams the observed ratio all/K- is greater than 50 for momenta less than 500 MeV/c. We recommend a two-stage separated beam with perhaps an upstream cleanup section for maximal purity

  13. Welding by laser beam

    International Nuclear Information System (INIS)

    A laser which does not require a vacuum and the beam from which can be projected over a distance without loss of power is sited outside a welding zone and the beam projected through a replaceable laser transparent window. The window is designed and shaped to facilitate access of the beam of workpiece items to be welded in containment. Either the workpiece or the laser beam may be moved during welding. (author)

  14. Proton beam writing

    OpenAIRE

    Frank Watt; Breese, Mark B H; Bettiol, Andrew A; Jeroen A. van Kan

    2007-01-01

    Proton beam (p-beam) writing is a new direct-writing process that uses a focused beam of MeV protons to pattern resist material at nanodimensions. The process, although similar in many ways to direct writing using electrons, nevertheless offers some interesting and unique advantages. Protons, being more massive, have deeper penetration in materials while maintaining a straight path, enabling p-beam writing to fabricate three-dimensional, high aspect ratio structures with vertical, smooth side...

  15. Electron beam focusing system

    Energy Technology Data Exchange (ETDEWEB)

    Dikansky, N.; Nagaitsev, S.; Parkhomchuk, V.

    1997-09-01

    The high energy electron cooling requires a very cold electron beam. Thus, the electron beam focusing system is very important for the performance of electron cooling. A system with and without longitudinal magnetic field is presented for discussion. Interaction of electron beam with the vacuum chamber as well as with the background ions and stored antiprotons can cause the coherent electron beam instabilities. Focusing system requirements needed to suppress these instabilities are presented.

  16. High-activity iodine-125 endocurietherapy for head and neck tumors

    Energy Technology Data Exchange (ETDEWEB)

    Kumar, P.P.; Good, R.R.; Yonkers, A.J.; Ogren, F.P.

    1989-02-01

    Inoperable solid tumor recurrence within a surgical bed or within a previously irradiated field usually responds poorly to re-treatment with conventional external beam irradiation (EXRT) and/or chemotherapy. We present a new, alternative method of re-treatment used in two patients with recurrent head and neck cancer involving the parotid (adenocarcinoma) and neck nodes (squamous cell carcinoma). These patients were successfully re-treated with high-activity /sup 125/iodine (I-125) permanent implantation.

  17. High-activity iodine-125 endocurietherapy for head and neck tumors

    International Nuclear Information System (INIS)

    Inoperable solid tumor recurrence within a surgical bed or within a previously irradiated field usually responds poorly to re-treatment with conventional external beam irradiation (EXRT) and/or chemotherapy. We present a new, alternative method of re-treatment used in two patients with recurrent head and neck cancer involving the parotid (adenocarcinoma) and neck nodes (squamous cell carcinoma). These patients were successfully re-treated with high-activity 125iodine (I-125) permanent implantation

  18. Electron beam curing of polymer matrix composites

    Energy Technology Data Exchange (ETDEWEB)

    Janke, C.J. [Lockheed Martin Energy Systems, Inc., Oak Ridge, TN (United States); Wheeler, D. [Sandia National Lab., Albuquerque, NM (United States); Saunders, C. [AECL Technologies, Inc., Rockville, MD (United States)] [and others

    1998-01-08

    The purpose of the CRADA was to conduct research and development activities to better understand and utilize the electron beam PMC curing technology. This technology will be used to replace or supplement existing PMC thermal curing processes in Department of Energy (DOE) Defense Programs (DP) projects and American aircraft and aerospace industries. This effort involved Lockheed Martin Energy Systems, Inc./Lockheed Martin Energy Research Corp. (Contractor), Sandia National Laboratories, and ten industrial Participants including four major aircraft and aerospace companies, three advanced materials companies, and three electron beam processing organizations. The technical objective of the CRADA was to synthesize and/or modify high performance, electron beam curable materials that meet specific end-use application requirements. There were six tasks in this CRADA including: Electron beam materials development; Electron beam database development; Economic analysis; Low-cost Electron Beam tooling development; Electron beam curing systems integration; and Demonstration articles/prototype structures development. The contractor managed, participated and integrated all the tasks, and optimized the project efforts through the coordination, exchange, and dissemination of information to the project participants. Members of the Contractor team were also the principal inventors on several electron beam related patents and a 1997 R and D 100 Award winner on Electron-Beam-Curable Cationic Epoxy Resins. The CRADA achieved a major breakthrough for the composites industry by having successfully developed high-performance electron beam curable cationic epoxy resins for use in composites, adhesives, tooling compounds, potting compounds, syntactic foams, etc. UCB Chemicals, the world`s largest supplier of radiation-curable polymers, has acquired a license to produce and sell these resins worldwide.

  19. Electron beam curing of polymer matrix composites

    International Nuclear Information System (INIS)

    The purpose of the CRADA was to conduct research and development activities to better understand and utilize the electron beam PMC curing technology. This technology will be used to replace or supplement existing PMC thermal curing processes in Department of Energy (DOE) Defense Programs (DP) projects and American aircraft and aerospace industries. This effort involved Lockheed Martin Energy Systems, Inc./Lockheed Martin Energy Research Corp. (Contractor), Sandia National Laboratories, and ten industrial Participants including four major aircraft and aerospace companies, three advanced materials companies, and three electron beam processing organizations. The technical objective of the CRADA was to synthesize and/or modify high performance, electron beam curable materials that meet specific end-use application requirements. There were six tasks in this CRADA including: Electron beam materials development; Electron beam database development; Economic analysis; Low-cost Electron Beam tooling development; Electron beam curing systems integration; and Demonstration articles/prototype structures development. The contractor managed, participated and integrated all the tasks, and optimized the project efforts through the coordination, exchange, and dissemination of information to the project participants. Members of the Contractor team were also the principal inventors on several electron beam related patents and a 1997 R and D 100 Award winner on Electron-Beam-Curable Cationic Epoxy Resins. The CRADA achieved a major breakthrough for the composites industry by having successfully developed high-performance electron beam curable cationic epoxy resins for use in composites, adhesives, tooling compounds, potting compounds, syntactic foams, etc. UCB Chemicals, the world's largest supplier of radiation-curable polymers, has acquired a license to produce and sell these resins worldwide

  20. Beam line for Schools: beyond expectations

    CERN Multimedia

    Cian O'Luanaigh

    2014-01-01

    Out of 292 proposals for CERN's first ever "Beam line for Schools" contest, two teams of high-school students – Odysseus' Comrades from Varvakios Pilot School in Athens, Greece and Dominicuscollege from Dominicus College in Nijmegen in the Netherlands – were selected to spend 10 days conducting their proposed experiments at the fully equipped T9 beam line on CERN's Meyrin site. Dedicated CERN staff and users from across the departments have put in a huge effort to ensure the success of the project.   Detector physicist Cenk Yidriz (centre, white helmet) explains the setup of the "Beamline for schools" experiment at the T9 beamline. It's finally beam time. After months of organisation, coding, engineering and even painting the experimental area, the T9 beam line is ready to deliver protons to experiments devised and built by high-school students. “They are here to collect data and experience the l...