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. 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.

  3. 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.

  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. 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 Document Server

    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.

  6. 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 Document Server

    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.

  7. Engineering science and mechanics department head named

    OpenAIRE

    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. Head of Department of Mechanical Engineering appointed

    OpenAIRE

    Nystrom, Lynn A.

    2004-01-01

    Kenneth S. Ball, professor of mechanical engineering at the University of Texas at Austin, will become the head of the Department of Mechanical Engineering in Virginia Tech's College of Engineering Aug. 1.

  9. 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.

  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. Reflective Decision Making among University Department Heads across Academic Disciplines

    Science.gov (United States)

    Kampmann, Jennifer A.

    2012-01-01

    Within the scope of leadership and management, decision making greatly defines the role of university administrator, in particular, the university department head and his/her ability to be a reflective practitioner in the realm of decision making. Decision making is one characteristic of university department head work which warrants close…

  14. Measuring How the Head of Department Measures Up: Development of an Evaluation Framework for the Head of Department Role

    Science.gov (United States)

    London, Chad

    2011-01-01

    The head of department position has been an integral role in the organisational structure of colleges and universities for over a hundred years. Recently, many institutions of higher education have called on department heads to provide advancing quality management and leadership to academic units in response to an increasingly complex and…

  15. Model of an Ideal Head of the Personnel Department

    Directory of Open Access Journals (Sweden)

    Tsyurko Inna A.

    2013-12-01

    Full Text Available 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 article conducts assessment of the head of the personnel department in accordance with the 20 dimensions competency model. The article reveals strengths and weaknesses in the work of the head by the results of the assessment. The author offers to allocate four types of managers: “ideal head”, “communicator”, “formalist” and “powerful mechanism”. Differences between the presented types of the heads of the personnel department depends on how much they are oriented in their work at the work with the personnel and at realisation of the strategy of efficient enterprise management.

  16. Status of head-on beam-beam compensation in RHIC

    CERN Document Server

    Fischer, W; Anerella, M; Blaskiewicz, M; Bruno, D; Costanzo, M; Dawson, W C; Gassner, D M; Gu, X; Gupta, R C; Hamdi, K; Hock, J; Hoff, L T; Hulsart, R; Jain, A K; Lambiase, R; Luo, Y; Mapes, M; Marone, A; Michnoff, R; Miller, T A; Minty, M; Montag, C; Muratore, J; Nemesure, S; Phillips, D; Pikin, A I; Plate, S R; Rosas, P; Snydstrup, L; Tan, Y; Theisen, C; Thieberger, P; Tuozzolo, J; Wanderer, P; White, S M; Zhang, W

    2014-01-01

    In polarized proton operation, the performance of the Relativistic Heavy Ion Collider (RHIC) is limited by the head-on beam-beam effect. To overcome this limitation, two electron lenses are under commissioning. We give an overview of head-on beam-beam compensation in general and in the specific design for RHIC, which is based on electron lenses. The status of installation and commissioning are presented along with plans for the future.

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

    CERN Document Server

    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.

  18. 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

  19. 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.

  20. 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.

  1. The Dilemma of the English Department Head: A Report on the Survey of the Role and Responsibilities of the Heads of English Departments in Massachusetts Secondary Schools.

    Science.gov (United States)

    O'Brien, Marjorie M.

    Junior and senior high school English department heads in Massachusetts were surveyed as part of a project to provide a clearer picture of the extent and diversity of the department head's role and responsibilities, to offer recommendations to make the job more manageable and satisfying, and to provoke discussion and positive action. Separate…

  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. "The Plate That Runneth Over": An Inquiry into Department Head Fundraising Role

    Science.gov (United States)

    Morse, Andrew

    2013-01-01

    The purpose of this ethnographic case study was to explore the fundraising roles of 3 tenured academic department heads within a College of Education at a large, public, research-focused, doctoral-granting university. The following research questions were used to conduct the study: (a) What roles, if any, do academic department heads presently…

  4. 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…

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

    OpenAIRE

    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...

  6. [Academician V.E. Sokolov is the head of the General Biology Department].

    Science.gov (United States)

    Pavlov, D S; Shishkin, V S

    2009-01-01

    This paper considers the activity of Academician V.E. Sokolov as head of the General Biology Department of the Russian Academy of Sciences, which he headed from 1985 to 1998. The history of the struggle for the preservation of biological science, carried out by Sokolov and the Department headed by him over more than ten years, is shown based on archival and little-known published materials. Examples are given of the activity of the General Biology Department that had great scientific, public, and nature-conservation significance.

  7. 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…

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

    Directory of Open Access Journals (Sweden)

    Rejeb Belfekih Imen

    2015-03-01

    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.

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

    CERN Multimedia

    Patrice Loïez

    2002-01-01

    Y. Lemoigne (left) in discussion with M. Spiro during the visit to CERN of Directors and Heads of Department from the Saclay centre of the French atomic energy commision (CEA) in December. P. Jarry looks on.

  10. The Department Head: A Survey of Duties and Responsibilities.

    Science.gov (United States)

    Papalia, Anthony

    This study surveys 107 foreign language departments in secondary schools in western New York and identifies duties and practices of those responsible for the departmental leadership. The report also determines the amount of released time granted to perform departmental duties. The educational preparation and work experience of supervisory staff…

  11. Scholarship Perceptions of Academic Department Heads: Implications for Promoting Faculty Community Engagement Scholarship

    Science.gov (United States)

    Sobrero, Patricia; Jayaratne, K. S. U.

    2014-01-01

    After North Carolina State University developed recommendations for departments and faculty to integrate learning, discovery, and engagement through the scholarship of engagement, the issue was raised: "What do department heads think, and how do they support engagement especially during promotion, tenure, and reappointment of engaged…

  12. 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.

  13. Earnings Profiles of Department Heads: Comparing Cross-Sectional and Panel Models.

    Science.gov (United States)

    Ragan, James F., Jr.; Rehman, Qazi Najeeb

    1996-01-01

    A cross-sectional study of 842 faculty who served as department heads between 1965-92 was compared with 170 in a panel study for whom earnings were estimated using a personal effects model. The average chair received a 12% wage premium for administrative service. Skill depreciation was most severe and wage growth most adversely affected in the…

  14. 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…

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

    CERN Multimedia

    Patrice Loïez

    2002-01-01

    Left to right: Ph. Pradelles, M. Jacquemet and T. Taylor in discussion during the December visit of Directors and Heads of Department from the Saclay centre of the French atomic energy commission (CEA) to CERN's LHC magnet test facility. Looking on is Yves Lemoigne.

  16. 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…

  17. Agricultural and Extension Education Department Heads' Perceptions of Journals and Importance of Publishing.

    Science.gov (United States)

    Radhakrishna, Rama B.; Jackson, Gary

    1993-01-01

    Survey responses from 44 of 62 agricultural department heads showed that "Journal of Agricultural Education" was rated highest for familiarity and quality. Most important factors in faculty evaluation were articles in refereed journals, presentation of papers, and quantity of articles and presentations. (SK)

  18. Identifying the Training Needs of Heads of Department in a Newly Established University in Vietnam

    Science.gov (United States)

    Nguyen, Thi Lan Huong

    2012-01-01

    Although middle-level academic managers really need training in order to perform their roles adequately in the very changing context of higher education, little formal training is provided, particularly in less developed countries. This paper identifies the training needs of Heads of Department in a newly established university in Vietnam as a…

  19. Ear, Nose, Throat, Head and Neck Surgery Department Functioning as a Team in Nigeria: Any Benefit?

    OpenAIRE

    Adobamen, P. R. O. C.; Egbage, E. E.

    2012-01-01

    To call attention to the synergistic benefit of working as a team in a clinical department and to encourage others, to emulate this pattern of patients’ care for better results. Patients that were seen at the Ear, Nose, Throat, Head and Neck Surgery Clinic of the University of Benin Teaching Hospital, Benin City, Nigeria, who had the benefit of their cases reviewed by more than one consultant were included into the study. Parameters retrieved from the case notes included number of consultants...

  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. 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.

  2. 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

  3. 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.

  4. A solution to the shortage of nursing faculty: awareness and understanding of the leadership style of the nursing department head.

    Science.gov (United States)

    Byrne, Daria M; Martin, Barbara N

    2014-01-01

    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 designed to measure the department heads' leadership style as perceived by the nursing faculty and assess the nursing faculty members' level of professional satisfaction and organizational commitment. Five schools of nursing in 2 Midwestern states, with a total of 52 full-time baccalaureate nursing faculty, were the focus of the inquiry. Findings support statistically significant relationships between the 3 variables of department head leadership, organizational commitment, and professional satisfaction. Implications for leadership style exhibited by the nursing department head are discussed.

  5. Time-resolved scanning Kerr microscopy of flux beam formation in hard disk write heads

    Science.gov (United States)

    Valkass, Robert A. J.; Spicer, Timothy M.; Burgos Parra, Erick; Hicken, Robert J.; Bashir, Muhammad A.; Gubbins, Mark A.; Czoschke, Peter J.; Lopusnik, Radek

    2016-06-01

    To meet growing data storage needs, the density of data stored on hard disk drives must increase. In pursuit of this aim, the magnetodynamics of the hard disk write head must be characterized and understood, particularly the process of "flux beaming." In this study, seven different configurations of perpendicular magnetic recording (PMR) write heads were imaged using time-resolved scanning Kerr microscopy, revealing their detailed dynamic magnetic state during the write process. It was found that the precise position and number of driving coils can significantly alter the formation of flux beams during the write process. These results are applicable to the design and understanding of current PMR and next-generation heat-assisted magnetic recording devices, as well as being relevant to other magnetic devices.

  6. Curriculum leadership in action : A tale of four community college Heads of Department leading a curriculum development project

    NARCIS (Netherlands)

    Albashiry, N.M.; Voogt, J.M.; Pieters, J.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 severa

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

    NARCIS (Netherlands)

    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 severa

  8. 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…

  9. Sir William Burnett (1779-1861), professional head of the Royal Naval Medical Department and entrepreneur.

    Science.gov (United States)

    Penn, Christopher

    2004-08-01

    Sir William Burnett (1779-1861) had an active career as a Royal Navy surgeon in the French Revolutionary and Napoleonic Wars, including service at the battles of St Vincent, the Nile and Trafalgar. From 1822 to 1855 he was professional head of the Royal Naval Medical Department, when he provided effective leadership in a time of great change. Although his official work earned him the reputation of a "hard-working, unimaginative, somewhat harsh man", his correspondence shows a very humane centre under the official carapace. His official performance and reputation were both eroded towards the end of his career by his determined promotion of zinc chloride, for which he held lucrative patents.

  10. 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. Here, on a tour of CERN's LHC magnet test facility, LHC division leader Philippe Lebrun (right foreground) explains to visitors the construction and function of an LHC superconducting dipole magnet. Photo 01: Left to right: M. Roche, G. Carolla, M. Lequien, J.Y. Guillamot, B. Mercier, Y. Bourlat, J.-P. Pervès, D. Moulin, A. Masurel, Ph. Lebrun, and X. Vitart. Photo 03: Left to right: G. Carolla, M. Lequien, J.Y. Guillamot, M. Pierrey. B. Mercier, J.-P. Pervès, D. Moulin, A. Masurel, and Ph. Lebrun.

  11. 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. Here, on a tour of CERN's LHC magnet test facility, LHC division leader Philippe Lebrun (right) explains to visitors the myriad connections of an LHC superconducting dipole magnet. Photo 01: Left to right: J.Y. Gascoin, J. Feltesse, J.-P. Pervès, and Ph. Lebrun. Photo 02: Left to right: L. Laurent, B. Mercier, M. Lieven, B. Mansoulié, M. Pallier, M. Roche, G. Carola, J.Y. Gascoin, A. Masurel, X. Vitart, F. Kircher, J. Feltesse, J.-P. Pervès, and H. Barbelin. Photo 03: Left to right: Ph. Pallier, M. Roche, P. Laurent, J.-Y. Gascoin, G. Carola, A. Masurel, J. Feltesse, J.-P. Pervès, H. Barbelin, and Ph. Lebrun.

  12. Ear, nose, throat, head and neck surgery department functioning as a team in Nigeria: any benefit?

    Science.gov (United States)

    Adobamen, P R O C; Egbage, E E

    2014-01-01

    To call attention to the synergistic benefit of working as a team in a clinical department and to encourage others, to emulate this pattern of patients' care for better results. Patients that were seen at the Ear, Nose, Throat, Head and Neck Surgery Clinic of the University of Benin Teaching Hospital, Benin City, Nigeria, who had the benefit of their cases reviewed by more than one consultant were included into the study. Parameters retrieved from the case notes included number of consultants that reviewed each case, age, sex of patients, diagnosis, whether there was controversy, complimentary or synergistic benefit from the team work. 124 patients completed the study. 99 patients (79.84%) were reviewed by two consultants and 25 (20.16%) were reviewed by three of the four consultants available in the department. 79 (63.71%) patients had the benefit of a complimentary management, while 38 (30.65%) had synergistic benefit from the team work. Intradepartmental team work in patient management produces synergistic benefit for patients and more experience among consultant staff.

  13. 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.

  14. [Development of computer assisted learning program using cone beam projection for head radiography].

    Science.gov (United States)

    Nakazeko, Kazuma; Kajiwara, Hironori; Watanabe, Hiroyuki; Kuwayama, Jun; Karube, Shuhei; Araki, Misao; Hashimoto, Takeyuki; Shinohara, Hiroyuki

    2012-01-01

    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.

  15. Observation of dynamic wavelength shifts of a four-beam laser diode and study of its adaptability to optical heads.

    Science.gov (United States)

    Shinoda, M; Kime, K

    1995-04-01

    Dynamic wavelength shifts for a four-beam laser diode were observed with a streak camera system. The wavelength shift does not exceed 2 nm for pulsed laser beam operation at a bottom power of 5 mW and a peak power of 40 mW. For a 5-mW continuous operation laser beam, the induced wavelength shift in the presence of another laser beam under the above pulse condition does not exceed 1 nm. The observed wavelength shifts are small enough for practical use, and this four-beam laser diode can be successfully applied to multibeam optical heads for parallel data processing.

  16. Performance of Focused Ion Beam Trimmed Yoke-Type Magnetoresistive Heads for Magnetic Microscopy

    OpenAIRE

    Phillips, Gavin N.; Eisenberg, Martin; Draaisma, Eddie A.; Abelmann, Leon; Lodder, J. Cock

    2002-01-01

    Thin-film yoke-type magnetoresistive (MR) tape heads with eight channels have been used for scanning magnetoresistance microscopy. The NiFe read flux guides of the channels have been trimmed down from 12 ¿m to widths varying between 5 ¿m and 100 nm by focused ion-beam milling with Ga+ ions. The tape-bearing surface of the milled regions has been reconstructed in situ by the local deposition of Pt. Tracks with a minimum bit length of 1 ¿m have been written on Co-Ni-O metal evaporated tape and ...

  17. 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.

  18. 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…

  19. Middle-Level Academic Management: A Case Study on the Roles of the Heads of Department at a Vietnamese University

    Science.gov (United States)

    Nguyen, Thi Lan Huong

    2013-01-01

    Middle-level academic managers play a central role in university management; however, their roles are not always clear and straightforward. Although this research subject has been comprehensively investigated in the last 40 years, most studies are western-biased. This study examines the roles of Heads of Department in a newly established…

  20. 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.

  1. 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.

  2. Sharpening peripheral dose gradient via beam number enhancement from patient head tilt for stereotactic brain radiosurgery

    Science.gov (United States)

    Chiu, Joshua; Pierce, Marlon; Braunstein, Steve E.; Theodosopoulos, Philip V.; McDermott, Michael W.; Sneed, Penny K.; Ma, Lijun

    2016-10-01

    Sharp dose fall-off is the hallmark of brain radiosurgery for the purpose of delivering high dose radiation to the target while minimizing peripheral dose to regional normal brain tissue. In this study, a technique was developed to enhance the peripheral dose gradient by magnifying the total number of beams focused toward each isocenter through pre-programmed patient head tilting. This technique was tested in clinical settings on a dedicated brain radiosurgical system (GKPFX, Gamma Knife Perfexion, Elekta Oncology) by comparing dosimetry as well as delivery efficiency for 20 radiosurgical cases previously treated with the system. The 3-fold beam number enhancement (BNE) treatment plans were found to produce nearly identical target volume coverage (absolute value    0.2) and dose conformity (BNE CI  =  1.41  ±  0.22 versus 1.41  ±  0.11, P  >  0.99) as the original treatment plans. The total beam-on time for the 3-fold BNE treatment plans were also found to be comparable (peripheral dose gradient for brain radiosurgery. This work was presented in part at the 2015 ISRS Congress in Yokohama Japan.

  3. 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).

  4. 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.

  5. 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

  6. Coping with Natural Disasters: Lessons Learnt by a Head of Department

    Science.gov (United States)

    Lord, Beverley

    2011-01-01

    Since the first of the 29 significant earthquakes and thousands of aftershocks that the University of Canterbury (New Zealand) community has endured in the last year, Beverly Lord has learned a few lessons as a departmental head in a university during a time of natural disaster. Herein, she organizes and describes these lessons under five…

  7. Utility of head CT in the evaluation of vertigo/dizziness in the emergency department.

    Science.gov (United States)

    Lawhn-Heath, Courtney; Buckle, Christopher; Christoforidis, Gregory; Straus, Christopher

    2013-01-01

    Acute dizziness (including vertigo) is a common reason to visit the emergency room, and imaging with head CT is often performed initially to exclude a central cause. In this study, consecutive patients presenting with dizziness and undergoing head CT were retrospectively reviewed to determine diagnostic yield. Four hundred forty-eight consecutive head CTs in a representative sample of dizzy emergency room (ER) patients, including patients with other neurological symptoms, were reviewed to identify an acute or subacute cause for acute dizziness along with the frequency and modalities used in follow-up imaging. The diagnostic yield for head CT ordered in the ER for acute dizziness is low (2.2 %; 1.6 % for emergent findings), but MRI changes the diagnosis up to 16 % of the time, acutely in 8 % of cases. Consistent with the American College of Radiology appropriateness criteria and the literature, this study suggests a low diagnostic yield for CT in the evaluation of acute dizziness but an important role for MRI in appropriately selected cases.

  8. Calculation of focal positions in an optical head for parallel data processing with a monolithic four-beam laser diode.

    Science.gov (United States)

    Shinoda, M

    2001-03-01

    A method for calculating focal positions in a multibeam optical head by use of a multibeam laser diode, in which conditions for misalignment of the light source are taken into consideration, is introduced. One calculates the focal positions by using the practical characteristics of a monolithic four-beam laser diode and the practical specifications of the optics in an optical head. The results show that each focal position is defocused mainly as a result of curvature of the fields of the lenses. The adaptability of focal positions for various calculated conditions is discussed from the standpoint of depth of focus.

  9. An accelerator-based epithermal neutron beam design for BNCT and dosimetric evaluation using a voxel head phantom.

    Science.gov (United States)

    Lee, Deok-jae; Han, Chi Young; Park, Sung Ho; Kim, Jong Kyung

    2004-01-01

    The beam shaping assembly design has been investigated in order to improve the epithermal neutron beam for accelerator-based boron neutron capture therapy in intensity and quality, and dosimetric evaluation for the beams has been performed using both mathematical and voxel head phantoms with MCNP runs. The neutron source was assumed to be produced from a conventional 2.5 MeV proton accelerator with a thick (7)Li target. The results indicate that it is possible to enhance epithermal neutron flux remarkably as well as to embody a good spectrum shaping to epithermal neutrons only with the proper combination of moderator and reflector. It is also found that a larger number of thermal neutrons can reach deeply into the brain and, therefore, can reduce considerably the treatment time for brain tumours. Consequently, the epithermal neutron beams designed in this study can treat more effectively deep-seated brain tumours.

  10. [Metal artefact on head and neck cone-beam CT images].

    Science.gov (United States)

    Kovacs, Miklós; Fejérdy, Pál; Dobó, Nagy Csaba

    2008-10-01

    There are only a few factors, where the properties of the CBCT is inferior compared to conventional CT. One of these properties is the low contrast resolution, which has an importance in the discrimination of different soft tissues. Another difference is the image quality degrading effect by metal objects. This latter factor has much higher importance in head and neck region CBCT application. The metal artifact is closely related to other types of artifacts, like beam-hardening and x-ray photon scattering artifacts. In some of the cases, metal artifacts can be avoided by the proper adjustment of the scanning parameters, but sometimes the problem overgrows the possibilities. The current pre- and post-processing algorithms used for the correction of different artifacts can improve the image quality, but these algorithms are not the ultimate solution to the problem. The introduction of iterative reconstruction algorithms into the CBCT market will effectively reduce the most CT artifacts, however, the spread of this algorithms are set back because of the insufficient computational power of today's PCs. Another advantage of the use of iterative algorithms is that the patient dose could be significantly reduced.

  11. 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 Document Server

    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

  12. 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).

  13. 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…

  14. 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.

  15. 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

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

    Energy Technology Data Exchange (ETDEWEB)

    Kim, Jae Hun; Jeong, Ho Gul; Hwang, Jae Joon; Lee, Jung Hee; Han, Sang Sun [Dept. of Oral and Maxillofacial Radiology, Yonsei University, College of Dentistry, Seoul (Korea, Republic of)

    2016-06-15

    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. 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. 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. 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.

  17. 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.

  18. 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...

  19. 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).

  20. Multi-resolution statistical image reconstruction for mitigation of truncation effects: application to cone-beam CT of the head

    Science.gov (United States)

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

    2017-01-01

    A prototype cone-beam CT (CBCT) head scanner featuring model-based iterative reconstruction (MBIR) has been recently developed and demonstrated the potential for reliable detection of acute intracranial hemorrhage (ICH), which is vital to diagnosis of traumatic brain injury and hemorrhagic stroke. However, data truncation (e.g. due to the head holder) can result in artifacts that reduce image uniformity and challenge ICH detection. We propose a multi-resolution MBIR method with an extended reconstruction field of view (RFOV) to mitigate truncation effects in CBCT of the head. The image volume includes a fine voxel size in the (inner) nontruncated region and a coarse voxel size in the (outer) truncated region. This multi-resolution scheme allows extension of the RFOV to mitigate truncation effects while introducing minimal increase in computational complexity. The multi-resolution method was incorporated in a penalized weighted least-squares (PWLS) reconstruction framework previously developed for CBCT of the head. Experiments involving an anthropomorphic head phantom with truncation due to a carbon-fiber holder were shown to result in severe artifacts in conventional single-resolution PWLS, whereas extending the RFOV within the multi-resolution framework strongly reduced truncation artifacts. For the same extended RFOV, the multi-resolution approach reduced computation time compared to the single-resolution approach (viz. time reduced by 40.7%, 83.0%, and over 95% for an image volume of 6003, 8003, 10003 voxels). Algorithm parameters (e.g. regularization strength, the ratio of the fine and coarse voxel size, and RFOV size) were investigated to guide reliable parameter selection. The findings provide a promising method for truncation artifact reduction in CBCT and may be useful for other MBIR methods and applications for which truncation is a challenge.

  1. Comparison of Head Scatter Factor for 6MV and 10MV flattened (FB) and Unflattened (FFF) Photon Beam using indigenously Designed Columnar Mini Phantom.

    Science.gov (United States)

    Ashokkumar, Sigamani; Nambi Raj, N Arunai; Sinha, Sujit Nath; Yadav, Girigesh; Thiyagarajan, Rajesh; Raman, Kothanda; Mishra, Manindra Bhushan

    2014-07-01

    To measure and compare the head scatter factor for flattened (FB) and unflattened (FFF) of 6MV and 10MV photon beam using indigenously designed mini phantom. A columnar mini phantom was designed as recommended by AAPM Task Group 74 with low and high atomic number materials at 10 cm (mini phantom) and at approximately twice the depth of maximum dose water equivalent thickness (brass build-up cap). Scatter in the accelerator (Sc) values of 6MV-FFF photon beams are lesser than that of the 6MV-FB photon beams (0.66-2.8%; Clinac iX, 2300CD) and (0.47-1.74%; True beam) for field sizes ranging from 10 × 10 cm(2) to 40 × 40 cm(2). Sc values of 10MV-FFF photon beams are lesser (0.61-2.19%; True beam) than that of the 10MV-FB photons beams for field sizes ranging from 10 × 10 cm(2) to 40 × 40 cm(2). The SSD had no influence on head scatter for both flattened and unflattened beams and irrespective of head design of the different linear accelerators. The presence of field shaping device influences the Sc values. The collimator exchange effect reveals that the opening of the upper jaw increases Sc irrespective of FB or FFF photon beams and different linear accelerators, and it is less significant in FFF beams. Sc values of 6MV-FB square field were in good agreement with that of AAPM, TG-74 published data for Varian (Clinac iX, 2300CD) accelerator. Our results confirm that the removal of flattening filter decreases in the head scatter factor compared to flattened beam. This could reduce the out-of-field dose in advanced treatment delivery techniques.

  2. 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...

  3. First full-beam PET acquisitions in proton therapy with a modular dual-head dedicated system

    Science.gov (United States)

    Sportelli, G.; Belcari, N.; Camarlinghi, N.; Cirrone, G. A. P.; Cuttone, G.; Ferretti, S.; Kraan, A.; Ortuño, J. E.; Romano, F.; Santos, A.; Straub, K.; Tramontana, A.; Del Guerra, A.; Rosso, V.

    2014-01-01

    During particle therapy irradiation, positron emitters with half-lives ranging from 2 to 20 min are generated from nuclear processes. The half-lives are such that it is possible either to detect the positron signal in the treatment room using an in-beam positron emission tomography (PET) system, right after the irradiation, or to quickly transfer the patient to a close PET/CT scanner. Since the activity distribution is spatially correlated with the dose, it is possible to use PET imaging as an indirect method to assure the quality of the dose delivery. In this work, we present a new dedicated PET system able to operate in-beam. The PET apparatus consists in two 10 cm × 10 cm detector heads. Each detector is composed of four scintillating matrices of 23 × 23 LYSO crystals. The crystal size is 1.9 mm × 1.9 mm × 16 mm. Each scintillation matrix is read out independently with a modularized acquisition system. The distance between the two opposing detector heads was set to 20 cm. The system has very low dead time per detector area and a 3 ns coincidence window, which is capable to sustain high single count rates and to keep the random counts relatively low. This allows a new full-beam monitoring modality that includes data acquisition also while the beam is on. The PET system was tested during the irradiation at the CATANA (INFN, Catania, Italy) cyclotron-based proton therapy facility. Four acquisitions with different doses and dose rates were analysed. In all cases the random to total coincidences ratio was equal or less than 25%. For each measurement we estimated the accuracy and precision of the activity range on a set of voxel lines within an irradiated PMMA phantom. Results show that the inclusion of data acquired during the irradiation, referred to as beam-on data, improves both the precision and accuracy of the range measurement with respect to data acquired only after irradiation. Beam-on data alone are enough to give precisions better than 1 mm

  4. Use of dual-head gamma camera in radionuclide internal contamination monitoring on radiation workers from a nuclear medicine department

    Energy Technology Data Exchange (ETDEWEB)

    Rodriguez-Laguna, A.; Brandan, M.E., E-mail: alejandro.rodriguez.laguna@gmail.com [Universidad Nacional Autonoma de Mexico, Mexico D.F. (Mexico). Instituto de Fisica; Trujillo-Zamudio, F.E.; Estrada-Lobato, E. [Instituto Nacional de Cancerologia, Mexico D.F. (Mexico)

    2008-07-01

    As a part of an internal dosimetry program that is performed at the Mexican National Institute of Cancerology - Nuclear Medicine Department, in the present work we suggest a procedure for the routinely monitoring of internal contamination on radiation workers and nuclear medicine staff. The procedure is based on the identification and quantification of contaminating radionuclides in human body by using a dual-head whole-body gamma camera. The results have shown that the procedures described in this study can be used to implement a method to quantify minimal accumulated activity in the main human organs to evaluate internal contamination with radionuclides. The high sensitivity of the uncollimated gamma camera is advantageous for the routinely detection and identification of small activities of internal contamination. But, the null spatial resolution makes impossible the definition of contaminated region of interest. Then, the use of collimators is necessary to the quantification of incorporated radionuclides activities in the main human organs and for the internal doses assessment. (author)

  5. Simple technique to achieve a natural position of the head for cone beam computed tomography

    NARCIS (Netherlands)

    Damstra, Janalt; Fourie, Zacharias; Ren, Yijin

    2010-01-01

    We developed a modified laser level technique to record the natural position of the head in all three planes of space. This is a simple method for use with three-dimensional images and may be valuable in routine craniofacial assessment.

  6. Obstacles Faced by Heads of Departments and Faculty Members in the Jordanian Public Universities in the Implementation of Vocational and Technical Education Programs from Their Perspective

    Science.gov (United States)

    Hammad, Heba Ibraheem; Airout, Mostafa Mohammad

    2016-01-01

    The purpose of the study is to find out the obstacles faced by heads of departments and faculty members at Jordanian public universities in the implementation of vocational and technical education programs from their perspective, and to find out the effect of gender, experience, and academic rank on their perspective. To achieve the aim of the…

  7. Clinical Application of Cone-Beam Computed Tomography of the Rabbit Head: Part 1 - Normal Dentition.

    OpenAIRE

    2016-01-01

    Domestic rabbits (Oryctolagus cuniculus) are increasingly popular as household pets; therefore, veterinarians need to be familiar with the most common diseases afflicting rabbits including dental diseases. Diagnostic approaches for dental disease include gross oral examination, endoscopic oral examination, skull radiography, and computed tomography (CT). CT overcomes many limitations of standard radiography by permitting cross-sectional images of the rabbit head in multiple planes without sup...

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

    Energy Technology Data Exchange (ETDEWEB)

    Lee, Bong Ho; Kim, Jae Duk; Chung, Chae Heon [Department of Dental Science Graduate School and Oral Biology Research, Chosun University, Gwangju (Korea, Republic of)

    2008-03-15

    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 Mercuray{sup TM} (Hitachi, Japan) before and after wearing a CD for rehabilitation. Position of mandibular condyle within articular fossa at centric occlusion was evaluated with Vimplant2.0{sup TM} (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.

  9. Monte Carlo simulation of electron beams from an accelerator head using PENELOPE

    Science.gov (United States)

    Sempau, J.; Sánchez-Reyes, A.; Salvat, F.; Oulad ben Tahar, H.; Jiang, S. B.; Fernández-Varea, J. M.

    2001-04-01

    The Monte Carlo code PENELOPE has been used to simulate electron beams from a Siemens Mevatron KDS linac with nominal energies of 6, 12 and 18 MeV. Owing to its accuracy, which stems from that of the underlying physical interaction models, PENELOPE is suitable for simulating problems of interest to the medical physics community. It includes a geometry package that allows the definition of complex quadric geometries, such as those of irradiation instruments, in a straightforward manner. Dose distributions in water simulated with PENELOPE agree well with experimental measurements using a silicon detector and a monitoring ionization chamber. Insertion of a lead slab in the incident beam at the surface of the water phantom produces sharp variations in the dose distributions, which are correctly reproduced by the simulation code. Results from PENELOPE are also compared with those of equivalent simulations with the EGS4-based user codes BEAM and DOSXYZ. Angular and energy distributions of electrons and photons in the phase-space plane (at the downstream end of the applicator) obtained from both simulation codes are similar, although significant differences do appear in some cases. These differences, however, are shown to have a negligible effect on the calculated dose distributions. Various practical aspects of the simulations, such as the calculation of statistical uncertainties and the effect of the `latent' variance in the phase-space file, are discussed in detail.

  10. 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; Stayman, J Webster; Wang, Xiaohui; Foos, David H; Aygun, Nafi; Koliatsos, Vassillis E; Siewerdsen, Jeffrey H

    2016-08-21

    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 centered

  11. 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 centered

  12. 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...

  13. 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…

  14. Austerite et gestion dans les universites quebecoises: une analyse des perceptions de directeurs de departement=Austerity and Administration in Quebec's Universities: An Analysis of Department Heads' Perceptions.

    Science.gov (United States)

    Crespo, Manuel; And Others

    1986-01-01

    A survey of 25 Quebec university department chairmen concerning the management of budgetary austerity found that administrative responses are generally perceived as reactionary and short-sighted, but long-term solutions proposed by chairmen are based on conflicting views of the overall role of the institution. (MSE)

  15. Influence of Head Motion on the Accuracy of 3D Reconstruction with Cone-Beam CT: Landmark Identification Errors in Maxillofacial Surface Model

    Science.gov (United States)

    Song, Jin-Myoung; Cho, Jin-Hyoung

    2016-01-01

    Purpose The purpose of this study was to investigate the influence of head motion on the accuracy of three-dimensional (3D) reconstruction with cone-beam computed tomography (CBCT) scan. Materials and Methods Fifteen dry skulls were incorporated into a motion controller which simulated four types of head motion during CBCT scan: 2 horizontal rotations (to the right/to the left) and 2 vertical rotations (upward/downward). Each movement was triggered to occur at the start of the scan for 1 second by remote control. Four maxillofacial surface models with head motion and one control surface model without motion were obtained for each skull. Nine landmarks were identified on the five maxillofacial surface models for each skull, and landmark identification errors were compared between the control model and each of the models with head motion. Results Rendered surface models with head motion were similar to the control model in appearance; however, the landmark identification errors showed larger values in models with head motion than in the control. In particular, the Porion in the horizontal rotation models presented statistically significant differences (P CBCT scan might cause landmark identification errors on the 3D surface model in relation to the direction of the scanner rotation. Clinicians should take this into consideration to prevent patient movement during CBCT scan, particularly horizontal movement. PMID:27065238

  16. 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.

  17. 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.

  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. 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.

  20. 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.

  1. 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.

  2. 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.

  3. 新成立科室护士长护理管理%The new department head nurse nursing management experience

    Institute of Scientific and Technical Information of China (English)

    刘灵芝

    2016-01-01

    the safety and quality is the core of hospital management and eternal theme ,hospital nursing safety and quality is closely related to nurs‐ing management department ,in the hospital management ,nursing management position is extremely important .The head nurse is the most basic nurs‐ing department of nursing management specific leader and organizer ;The stand or fall of head nurse work not only directly affects the improvement of nursing quality ,and relationship to the whole work of the hospital ,how to improve the quality of nursing management ,hospital management ,nursing management to adapt to the new period ,and the development of nursing science and the change is the challenge for the head nurse .New department , the generation of a new thing in bring a lot of opportunities at the same time ,also bring us a lot of challenges ,new opportunities and challenges for nursing management department is coexist ,so this new department nursing management experience with all of you have a share .%安全与质量是医院管理的核心和永恒的主题,医院护理安全与质量与科室护理管理息息相关,在医院管理中,护理管理地位极其重要。护士长是护理管理中最基层科室护理工作的具体领导者和组织者;护士长工作的好坏不仅直接影响护理质量的提高,而且关系到整个医院工作的开展,如何提高护理质量管理,以适应新时期医院管理、护理管理,以及护理学科的发展和变化是护士长面临的挑战。新成立科室,一个新事物的产生在带来很多机遇的同时,也带给我们很大的挑战,新成立科室给护理管理带来的机遇和挑战是并存的,因此本篇就新成立科室护理管理体会与大家做个分享。

  4. The Prefabricated Installation Construction of the Collar Beam Pile Head on the Sea%海上系梁桩顶预制安装施工

    Institute of Scientific and Technical Information of China (English)

    吴文生; 王迎松

    2014-01-01

    This article combines with the successful constr-uction case of colar beam on the sea of Kuwait Mubarak. Bil Kay Railway Bridge and introduces a new method of colar beam construction technolog--prefabricated pile head instal-ation on the sea, in order to provide reference for the similar colar beam construction.%本文结合科威特穆巴拉克。凯比尔铁路桥海上系梁成功施工案例,介绍了一种全新的海上系梁施工工艺--桩顶预制安装,可供同类系梁施工参考。

  5. 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.

  6. 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.

  7. 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.

  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. 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 Document Server

    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.

  10. 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.

  11. 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.

  12. 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.

  13. 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.

  14. Influence of Head Motion on the Accuracy of 3D Reconstruction with Cone-Beam CT: Landmark Identification Errors in Maxillofacial Surface Model.

    Directory of Open Access Journals (Sweden)

    Kyung-Min Lee

    Full Text Available The purpose of this study was to investigate the influence of head motion on the accuracy of three-dimensional (3D reconstruction with cone-beam computed tomography (CBCT scan.Fifteen dry skulls were incorporated into a motion controller which simulated four types of head motion during CBCT scan: 2 horizontal rotations (to the right/to the left and 2 vertical rotations (upward/downward. Each movement was triggered to occur at the start of the scan for 1 second by remote control. Four maxillofacial surface models with head motion and one control surface model without motion were obtained for each skull. Nine landmarks were identified on the five maxillofacial surface models for each skull, and landmark identification errors were compared between the control model and each of the models with head motion.Rendered surface models with head motion were similar to the control model in appearance; however, the landmark identification errors showed larger values in models with head motion than in the control. In particular, the Porion in the horizontal rotation models presented statistically significant differences (P < .05. Statistically significant difference in the errors between the right and left side landmark was present in the left side rotation which was opposite direction to the scanner rotation (P < .05.Patient movement during CBCT scan might cause landmark identification errors on the 3D surface model in relation to the direction of the scanner rotation. Clinicians should take this into consideration to prevent patient movement during CBCT scan, particularly horizontal movement.

  15. Design and optimization of a beam shaping assembly for BNCT based on D-T neutron generator and dose evaluation using a simulated head phantom.

    Science.gov (United States)

    Rasouli, Fatemeh S; Masoudi, S Farhad

    2012-12-01

    A feasibility study was conducted to design a beam shaping assembly for BNCT based on D-T neutron generator. The optimization of this configuration has been realized in different steps. This proposed system consists of metallic uranium as neutron multiplier, TiF(3) and Al(2)O(3) as moderators, Pb as reflector, Ni as shield and Li-Poly as collimator to guide neutrons toward the patient position. The in-air parameters recommended by IAEA were assessed for this proposed configuration without using any filters which enables us to have a high epithermal neutron flux at the beam port. Also a simulated Snyder head phantom was used to evaluate dose profiles due to the irradiation of designed beam. The dose evaluation results and depth-dose curves show that the neutron beam designed in this work is effective for deep-seated brain tumor treatments even with D-T neutron generator with a neutron yield of 2.4×10(12) n/s. The Monte Carlo Code MCNP-4C is used in order to perform these calculations.

  16. 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

  17. William Brinkman (centre), Director of the Department of Energy, U.S.A. at the superconducting magnet test hall SM18 with (from left to right) Coordinator for External Relations F. Pauss, Advisor for Non-Member States J. Ellis, J. Strait from Fermilab and Deputy Head of Technology Department L. Rossi on 13 November 2009.

    CERN Multimedia

    Maximilien Brice; SM18

    2009-01-01

    William Brinkman (centre), Director of the Department of Energy, U.S.A. at the superconducting magnet test hall SM18 with (from left to right) Coordinator for External Relations F. Pauss, Advisor for Non-Member States J. Ellis, J. Strait from Fermilab and Deputy Head of Technology Department L. Rossi on 13 November 2009.

  18. 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 Multimedia

    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.

  19. Shore Duty Department Head School

    Science.gov (United States)

    1990-11-01

    evaluation model and types of forms/ questionaires to be ulized by t’he trainers and trainees to assess the program and the formal instruction. A pilot...Academy. Policy adjustments have been made to incorporate OPNAVINST’s on pregnant sailors, sexual harrassment policy/guidelines, vessels on which women...receive appropriated funds? Yes. It is called Indirect Support. It is for protecting "the health and safety of participants, employees, resources and

  20. Interpretation of head CT scans in the emergency department by fellows versus general staff non-neuroradiologists: a closer look at the effectiveness of a quality control program.

    Science.gov (United States)

    Le, Alexander H; Licurse, Adam; Catanzano, Tara M

    2007-10-01

    Prior studies have evaluated discordance rates among radiology residents in interpretation of head computed tomograms (CTs). To our knowledge, there has been no study to compare performance among first-year fellows and more experienced general staff radiologists. This study will compare performances of these groups and evaluate the effect of a redundant system as part of a quality control program. Retrospective review of 3,886 consecutive head CTs in the Emergency Department from 7/01/04 to 6/30/2005 was performed. Fellows interpreted 2,150 and general staff radiologists 1,736 cases. Staff radiologist mean experience was 4 years (2-10 years). All primary interpretations were over-read by staff neuroradiologists (>10 years experience) as quality control. Discrepancies were divided into "major discordance" and "minor discordance." Major discordance is defined as a misread occurred that potentially delayed clinical management and thus may have incurred in mortality or disability. Minor discordance is defined as if there was no change in clinical management or impact on the patient's outcome. The patient electronic medical records were obtained and retrospectively reviewed to identify if there was an acute change in clinical management. Overall discordance rate of both groups was 2.7% (103/3,886), 0.3% major false negative (10/3,886), 1.7% minor false negative (65/3,886), 0.4% false positive (15/3,886). Fellows overall discordance rate was 2.6% (55/2,150) with major false negatives 4/2,150 (0.2%) and 2.8% (48/1,736) for general staff radiologists with 6/1736 (0.3%) major false negatives, p values 0.69 and 0.14, respectively. Three out of ten major false negatives were confirmed with the quality assurance interpretation on follow-up studies; four cases were in agreement with initial interpretation. Performance among first-year fellows and general staff radiologists in interpretation of head CTs was highly accurate (97.3%) without statistically significant difference

  1. Informing the design of clinical decision support services for evaluation of children with minor blunt head trauma in the emergency department: a sociotechnical analysis.

    Science.gov (United States)

    Sheehan, Barbara; Nigrovic, Lise E; Dayan, Peter S; Kuppermann, Nathan; Ballard, Dustin W; Alessandrini, Evaline; Bajaj, Lalit; Goldberg, Howard; Hoffman, Jeffrey; Offerman, Steven R; Mark, Dustin G; Swietlik, Marguerite; Tham, Eric; Tzimenatos, Leah; Vinson, David R; Jones, Grant S; Bakken, Suzanne

    2013-10-01

    Integration of clinical decision support services (CDSS) into electronic health records (EHRs) may be integral to widespread dissemination and use of clinical prediction rules in the emergency department (ED). However, the best way to design such services to maximize their usefulness in such a complex setting is poorly understood. We conducted a multi-site cross-sectional qualitative study whose aim was to describe the sociotechnical environment in the ED to inform the design of a CDSS intervention to implement the Pediatric Emergency Care Applied Research Network (PECARN) clinical prediction rules for children with minor blunt head trauma. Informed by a sociotechnical model consisting of eight dimensions, we conducted focus groups, individual interviews and workflow observations in 11 EDs, of which 5 were located in academic medical centers and 6 were in community hospitals. A total of 126 ED clinicians, information technology specialists, and administrators participated. We clustered data into 19 categories of sociotechnical factors through a process of thematic analysis and subsequently organized the categories into a sociotechnical matrix consisting of three high-level sociotechnical dimensions (workflow and communication, organizational factors, human factors) and three themes (interdisciplinary assessment processes, clinical practices related to prediction rules, EHR as a decision support tool). Design challenges that emerged from the analysis included the need to use structured data fields to support data capture and re-use while maintaining efficient care processes, supporting interdisciplinary communication, and facilitating family-clinician interaction for decision-making.

  2. Accuracy of software-assisted contour propagation from planning CT to cone beam CT in head and neck radiotherapy

    DEFF Research Database (Denmark)

    Hvid, Christian A.; Elstrøm, Ulrik V.; Jensen, Kenneth

    2016-01-01

    . A cross sectional quality of life study of 116 recurrence free head and neck cancer patients. The first use of EORTC H&N35 in Danish. Acta Oncol 2006;45:28–37. Jensen K, Lambertsen K, Grau C. Late swallowing dysfunction and dysphagia after radiotherapy for pharynx cancer: frequency, intensity...... contouring of target volumes and normal tissues, which remains a time consuming task, even for experienced clinicians. There is a growing array of commercial software aimed at easing this burden by automatic contouring, utilizing novel deformable image registration (DIR) techniques to propagate one set...... have been found to reduce contouring time considerably [15 La Macchia M, Fellin F, Amichetti M, et al. Systematic evaluation of three different commercial software solutions for automatic segmentation for adaptive therapy in head-and-neck, prostate and pleural cancer. Radiat Oncol 2012;7:160. [Cross...

  3. Comparison of proton therapy treatment planning for head tumors with a pencil beam algorithm on dual and single energy CT images

    Energy Technology Data Exchange (ETDEWEB)

    Hudobivnik, Nace; Dedes, George; Parodi, Katia; Landry, Guillaume, E-mail: g.landry@lmu.de [Department of Medical Physics, Ludwig-Maximilians-University, Munich 85748 (Germany); Schwarz, Florian; Johnson, Thorsten; Sommer, Wieland H. [Institute for Clinical Radiology, Ludwig Maximilians University Hospital Munich, 81377 Munich (Germany); Agolli, Linda [Department of Radiation Oncology, Ludwig-Maximilians-University, Munich 81377, Germany and Radiation Oncology, Sant’ Andrea Hospital, Sapienza University, Rome 00189 (Italy); Tessonnier, Thomas [Department of Medical Physics, Ludwig-Maximilians-University, Munich 85748, Germany and Department of Radiation Oncology, Heidelberg University Hospital, Heidelberg (Germany); Verhaegen, Frank [Department of Radiation Oncology (MAASTRO), GROW School for Oncology and Developmental Biology, Maastricht 6229 ET, the Netherlands and Medical Physics Unit, Department of Oncology, McGill University, Montreal, Quebec H3A 0G4 (Canada); Thieke, Christian; Belka, Claus [Department of Radiation Oncology, Ludwig-Maximilians-University, Munich 81377 (Germany)

    2016-01-15

    Purpose: Dual energy CT (DECT) has recently been proposed as an improvement over single energy CT (SECT) for stopping power ratio (SPR) estimation for proton therapy treatment planning (TP), thereby potentially reducing range uncertainties. Published literature investigated phantoms. This study aims at performing proton therapy TP on SECT and DECT head images of the same patients and at evaluating whether the reported improved DECT SPR accuracy translates into clinically relevant range shifts in clinical head treatment scenarios. Methods: Two phantoms were scanned at a last generation dual source DECT scanner at 90 and 150 kVp with Sn filtration. The first phantom (Gammex phantom) was used to calibrate the scanner in terms of SPR while the second served as evaluation (CIRS phantom). DECT images of five head trauma patients were used as surrogate cancer patient images for TP of proton therapy. Pencil beam algorithm based TP was performed on SECT and DECT images and the dose distributions corresponding to the optimized proton plans were calculated using a Monte Carlo (MC) simulation platform using the same patient geometry for both plans obtained from conversion of the 150 kVp images. Range shifts between the MC dose distributions from SECT and DECT plans were assessed using 2D range maps. Results: SPR root mean square errors (RMSEs) for the inserts of the Gammex phantom were 1.9%, 1.8%, and 1.2% for SECT phantom calibration (SECT{sub phantom}), SECT stoichiometric calibration (SECT{sub stoichiometric}), and DECT calibration, respectively. For the CIRS phantom, these were 3.6%, 1.6%, and 1.0%. When investigating patient anatomy, group median range differences of up to −1.4% were observed for head cases when comparing SECT{sub stoichiometric} with DECT. For this calibration the 25th and 75th percentiles varied from −2% to 0% across the five patients. The group median was found to be limited to 0.5% when using SECT{sub phantom} and the 25th and 75th percentiles

  4. 9 July 2008 - Microsoft Co-Founder P. Allen visiting ATLAS control room and underground experimental area with Adviser J. Ellis and IT Department Head W. von Rüden.

    CERN Multimedia

    Maximilien Brice

    2008-01-01

    9 July 2008 - Microsoft Co-Founder P. Allen visiting ATLAS control room and underground experimental area with Adviser J. Ellis and IT Department Head W. von Rüden and guided by ATLAS Collaboration Users S. Goldfarb, P. Nevski and L. Price.

  5. Measuring uncertainty in dose delivered to the cochlea due to setup error during external beam treatment of patients with cancer of the head and neck

    Energy Technology Data Exchange (ETDEWEB)

    Yan, M.; Lovelock, D.; Hunt, M.; Mechalakos, J.; Hu, Y.; Pham, H.; Jackson, A., E-mail: jacksona@mskcc.org [Department of Medical Physics, Memorial Sloan-Kettering Cancer Center, New York, New York 10065 (United States)

    2013-12-15

    Purpose: To use Cone Beam CT scans obtained just prior to treatments of head and neck cancer patients to measure the setup error and cumulative dose uncertainty of the cochlea. Methods: Data from 10 head and neck patients with 10 planning CTs and 52 Cone Beam CTs taken at time of treatment were used in this study. Patients were treated with conventional fractionation using an IMRT dose painting technique, most with 33 fractions. Weekly radiographic imaging was used to correct the patient setup. The authors used rigid registration of the planning CT and Cone Beam CT scans to find the translational and rotational setup errors, and the spatial setup errors of the cochlea. The planning CT was rotated and translated such that the cochlea positions match those seen in the cone beam scans, cochlea doses were recalculated and fractional doses accumulated. Uncertainties in the positions and cumulative doses of the cochlea were calculated with and without setup adjustments from radiographic imaging. Results: The mean setup error of the cochlea was 0.04 ± 0.33 or 0.06 ± 0.43 cm for RL, 0.09 ± 0.27 or 0.07 ± 0.48 cm for AP, and 0.00 ± 0.21 or −0.24 ± 0.45 cm for SI with and without radiographic imaging, respectively. Setup with radiographic imaging reduced the standard deviation of the setup error by roughly 1–2 mm. The uncertainty of the cochlea dose depends on the treatment plan and the relative positions of the cochlea and target volumes. Combining results for the left and right cochlea, the authors found the accumulated uncertainty of the cochlea dose per fraction was 4.82 (0.39–16.8) cGy, or 10.1 (0.8–32.4) cGy, with and without radiographic imaging, respectively; the percentage uncertainties relative to the planned doses were 4.32% (0.28%–9.06%) and 10.2% (0.7%–63.6%), respectively. Conclusions: Patient setup error introduces uncertainty in the position of the cochlea during radiation treatment. With the assistance of radiographic imaging during setup

  6. Cone-beam CT with a flat-panel detector on a mobile C-arm: preclinical investigation in image-guided surgery of the head and neck

    Science.gov (United States)

    Siewerdsen, J. H.; Chan, Y.; Rafferty, M. A.; Moseley, D. J.; Jaffray, D. A.; Irish, J. C.

    2005-04-01

    A promising imaging platform for combined low-dose fluoroscopy and cone-beam CT (CBCT) guidance of interventional procedures has been developed in our laboratory. Based on a mobile isocentric C-arm (Siemens PowerMobil) incorporating a high-performance flat-panel detector (Varian PaxScan 4030CB), the system demonstrates sub-mm 3D spatial resolution and soft-tissue visibility with field of view sufficient for head and body sites. For pre-clinical studies in head neck tumor surgery, we hypothesize that the 3D intraoperative information provided by CBCT permits precise, aggressive techniques with improved avoidance of critical structures. The objectives include: 1) quantify improvement in surgical performance achieved with CBCT guidance compared to open and endoscopic techniques; and 2) investigate specific, challenging surgical tasks under CBCT guidance. Investigations proceed from an idealized phantom model to cadaveric specimens. A novel surgical performance evaluation method based on statistical decision theory is applied to excision and avoidance tasks. Analogous to receiver operating characteristic (ROC) analysis in medical imaging, the method quantifies surgical performance in terms of Lesion-Excised (True-Positve), Lesion-Remaining (False-Negative), Normal-Excised (False-Positive), and Normal-Remaining (True-Negative) fractions. Conservative and aggressive excision and avoidance tasks are executed in 12 cadaveric specimens with and without CBCT guidance, including: dissection through dura, preservation of posterior lamina, ethmoid air cells removal, exposure of peri-orbita, and excision of infiltrated bone in the skull base (clivus). Intraoperative CBCT data was found to dramatically improve surgical performance and confidence in the execution of such tasks. Pre-clinical investigation of this platform in head and neck surgery, as well as spinal, trauma, biopsy, and other nonvascular procedures, is discussed.

  7. The use of cone-beam computed tomography in an orthodontic department in between research and daily clinic.

    Science.gov (United States)

    Cattaneo, Paolo M; Melsen, Birte

    2008-01-01

    A correct orthodontic diagnosis needs to be based on accurate images of the craniofacial region and is crucial for the development of a valid treatment plan. A cone-beam computed tomography (CBCT) scanner allows 3D imaging of the craniofacial complex. CBCT scanners represent a significant advantage in imaging capabilities for dentistry and orthodontics, replacing conventional 2D radiographic images with 3D data sets and only a small increase in radiation. The present study surveys the rationale, advantages, and disadvantages of the available CBCT appliances and presents answers to questions often asked in relation to this technology.

  8. Novel information theory based method for superimposition of lateral head radiographs and cone beam computed tomography images

    Science.gov (United States)

    Jacquet, W; Nyssen, E; Bottenberg, P; de Groen, P; Vande Vannet, B

    2010-01-01

    Objectives The aim was to introduce a novel alignment criterion, focus mutual information (FMI), for the superimposition of lateral cephalometric radiographs and three dimensional (3D) cone beam computed images as well as the assessment of the alignment characteristics of the new method and comparison of the novel methodology with the region of interest (ROI) approach. Methods Implementation of a FMI criterion-based methodology that only requires the approximate indication of stable structures in one single image. The robustness of the method was first addressed in a phantom experiment comparing the new technique with a ROI approach. Two consecutive cephalometric radiographs were then obtained, one before and one after functional twin block application. These images were then superimposed using alignment by FMI where the following were focused on, in several ways: (1) cranial base and acoustic meatus, (2) palatal plane and (3) mandibular symphysis. The superimposed images were subtracted and coloured. The applicability to cone beam CT (CBCT) is illustrated by the alignment of CBCT images acquired before and after craniofacial surgery. Results The phantom experiment clearly shows superior alignment when compared to the ROI approach (Wilcoxon n = 17, Z = −3.290, and P = 0.001), and robustness with respect to the choice of parameters (one-sample t-test n = 50, t = −12.355, and P = 0.000). The treatment effects are revealed clearly in the subtraction image of well-aligned cephalometric radiographs. The colouring scheme of the subtraction image emphasises the areas of change and visualizes the remodelling of the soft tissue. Conclusions FMI allows for cephalometry without tracing, it avoids the error inherent to the use of landmarks and the interaction of the practitioner is kept to a minimum. The robustness to focal distribution variations limits the influence of possible examiner inaccuracy. PMID:20395459

  9. 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。

  10. 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.

  11. 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.

  12. Clinical Application of Cone Beam Computed Tomography of the Rabbit Head: Part 2—Dental Disease

    Science.gov (United States)

    Riggs, G. G.; Cissell, Derek D.; Arzi, Boaz; Hatcher, David C.; Kass, Philip H.; Zhen, Amy; Verstraete, Frank J. M.

    2017-01-01

    Domestic rabbits are increasing in popularity as household pets; therefore, veterinarians need to be familiar with the most common diseases afflicting rabbits including dental disease. Current diagnostic approaches include gross oral examination, endoscopic oral examination, skull radiography, and computed tomography (CT). Cone beam computed tomography (CBCT), a new oral and maxillofacial imaging modality that has the capability to produce high-resolution images, has not yet been described for use in evaluating dental disease in rabbits. A total of 15 client-owned rabbits had CBCT, oral examination, dental charting, and dental treatment performed under general anesthesia. Images were evaluated using transverse and custom multiplanar (MPR), 3D, and panoramic reconstructed images. The CBCT findings were grouped into abnormalities that could be detected on conscious oral examination vs. abnormalities that could not be detected by conscious oral examination. Potential associations between the two categories were examined by pairwise Fisher’s exact test with statistical significance determined by P < 0.05. The most common findings identified on CBCT images were periodontal ligament space widening (14/15), premolar and molar malocclusion (13/15), apical elongation (13/15), coronal elongation (12/15), inflammatory tooth resorption (12/15), periapical lucency (11/15), moth-eaten pattern of osteolysis of the alveolar bone (9/15), ventral mandibular border contour changes (9/15), and missing teeth (8/15). Of the CBCT abnormalities likely to be observed on oral examination, coronal elongation (detectable on oral examination) was significantly associated with apical elongation (P = 0.029). There were no other significant associations between CBCT findings that are also clinically detectable and CBCT findings that are not be detectable on oral examination. This suggests that pathology often exists that is not apparent upon oral examination. This study establishes the

  13. Discussion of responsibility of head nurses in nursing quality improvement in obstetrical and gynecological department%护士长在提高妇产科护理质量中的职责探讨

    Institute of Scientific and Technical Information of China (English)

    孙玺荣; 王文洋

    2009-01-01

    Objective To discuss the responsibility and quality requirement of head nurses in nursing quality improvement in obstetrical and gynecological department.Methods The responsibility of head nurses in nursing quality improvement in obstetrical and gynecological department were investigated by carrying out surveys in patients of obstetrical and gynecological department.Results The quality of head nurses needed improvement and their responsibility required definitude,thus the satisfaction degree of patients and nursing quality can be improved.Conclusions Through this research,we find that the head nurses not only need good quality,but also should be given definite responsibility and certain service,supervising and management power,if so,they can fully exert their role in nursing work.%目的 探讨在提高妇产科护理质量中护士长的职能与素质要求.方法 对我院妇产科的患者进行调查,了解护士长在提高妇产科护理质量中的职责.结果 护士长素质有待提高,职责有待明确,其可提高患者的满意度和护理质量.结论 通过我们的研究发现,要想切实落实提高护理质量的措施,不仅护士长要具备优良的自身素质,而且还需要给予护士长明确的职能、一定的服务监督管理权,对护士长实行责任制度,这样才能充分发挥护士长在护理丁作中的作用.

  14. BE Department Annual Report 2014

    CERN Document Server

    Collier, Paul; Billen, Ronny; Bruning, Oliver; Garoby, Roland; Hatziangeli, Eugenia; Jensen, Erk; Jones, Rhodri; Lamont, Mike; Mackney, Anna

    2015-01-01

    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 2014 highlights for the BE Department.

  15. Comparison of build-up dose between Elekta and Varian linear accelerators for high-energy photon beams using radiochromic film and clinical implications for IMRT head and neck treatments.

    Science.gov (United States)

    Paelinck, L; De Wagter, C; Van Esch, A; Duthoy, W; Depuydt, T; De Neve, W

    2005-02-07

    Skin toxicity has been reported for IMRT of head and neck cancer. The purpose of this study was to investigate the dose in the build-up region delivered by a 6 MV treatment plan for which important skin toxicity was observed. We also investigated if the different designs of the treatment head of an Elekta and a Varian linear accelerator, especially the lower position of the Varian multi-leaf collimator, give rise to different build-up doses. For regular square open beams, the build-up dose along the central beam axis is higher for the Varian machine than for the Elekta machine, both for 6 MV and 18 MV. At the Elekta machine at 18 MV, the superficial dose of a diamond shaped 10 x 10 cm2 field is 3.6% lower than the superficial dose of a regular 10 x 10 cm2 field. This effect is not seen at 6 MV. At the Varian machine, the superficial dose of the diamond shaped field is respectively 3.5 and 14.2% higher than the superficial dose of the regular 10 x 10 cm2 field for 6 MV and 18 MV. Despite the differences measured in build-up dose for single beams between the Elekta and the Varian linear accelerator, there were no measurable differences in superficial dose when a typical IMRT dose plan of 6 MV for a head and neck tumour is executed at the two machines.

  16. 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...

  17. 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...

  18. 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 Document Server

    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.

  19. Measurement of Tumor Dose Using Optically Stimulated Luminescence Detectors (OSLDs) and Ionization Chambers for Primary and Metastatic Lymph Node Cancers with Head and Neck: Comparison of Beam Spoiler and Bolus

    Energy Technology Data Exchange (ETDEWEB)

    Lee, Jeong Ok [Dept. of Radiotechnology, Wonkwang Health Science University, Iksan (Korea, Republic of); Lee, Jae Seung [Dept. of Physics, Soonchunhyang University, Seoul (Korea, Republic of); Jeong, Dong Hyeok [Research center, Dongnam Inst. of Radiological and Medical Science, Busan (Korea, Republic of)

    2011-09-15

    This study conducts cross-comparison through verification of treatment planning of using beam spoiler and bolus, according to the dose variation of different tumor bed and metastatic lymph node cancers, against ionization and optically stimulated luminescence detectors(OSLDs), in head and neck radiotherapy. Verification of treatment planning examined the feasibility of inserting detectors through simulated solid dry water slabs under identical irradiated conditions from treatment planning system to measure beam spoiler and 0.5, 1 cm bolus. In addition, two detectors were cross-compared for verification of treatment planning accuracy and reliability within {+-} 2%. The study found that, given a beam spoiler thickness of 0.5 cm and beam spoiler-to-skin distance of 10 cm subjected to optimal dose distribution given for metastatic lymph node cancers, the bolus low-level skin dose was less, and the tumor bed dose reduced slightly. Additionally, two detectors were cross-compared for accuracy within {+-} 1%. Accordingly, The use of beam spoiler was determined that reduces skin side effects and can deliver an optimal dose distribution for tumor, and to apply to future clinical studies should be performed.

  20. Halo formation from mismatched beam-beam interactions

    Energy Technology Data Exchange (ETDEWEB)

    Qiang, Ji

    2003-05-23

    In this paper, we report on the halo formation and emittance growth driven by a parametric resonance during mismatched beam-beam collisions. In the regime of the weak-strong beam-beam interaction, if two beams have the same machine tunes, on-axis head-on collisions between a mismatched strong beam and a weak beam will not cause the formation of halo. However, if the two beams collide with an initial offset, the beam-beam force from the mismatched strong beam can cause halo formation and emittance growth in the weak beam. Meanwhile, if two beams have different machine tunes, for opposite charged colliding beams, when the machine tune of the weak beam is smaller than that of strong beam, there is emittance growth in the weak beam. When the machine tune of the weak beam is larger than that of the strong beam, there is little emittance growth. In the regime of strong-strong beam-beam interaction, halo is formed in both beams even when the two beams collide head-on on the axis with equal machine tunes. This puts a strong requirement for a good beam match during the injection to colliders in order to avoid the emittance growth.

  1. INDICATORS OF INDIVIDUAL AND COMMUNITY MENTAL HEALTH IN WOMEN-HEADED HOUSEHOLDS IN SITUATIONS OF FORCED DISPLACEMENT IN THE DEPARTMENT OF QUINDÍO.

    Directory of Open Access Journals (Sweden)

    José Alonso Andrade Salazar

    2012-06-01

    Full Text Available Esta investigación tiene como objetivo, analizar el impacto psicosocial que el conflicto armado tiene en la salud mental individual y comunitaria de 30 mujeres cabeza de hogar en situación de desplazamiento forzado en el departamento del Quindío. Para ello se aplicó una ficha de caracterización, la cual indicó que el 53% de las mujeres desplazadas no siente que controla su vida emocional, un 90% no accede a redes de apoyo social y el 70% no cuenta con relaciones de comunicación positiva en la familia. Igualmente, muchas de ellas no tienen oportunidades educativas permanentes (70% considerándose excluidas y señaladas por la comunidad (47%. El estudio indicó que el 80% no ha solicitado asistencia psicológica y que un 67% piensa que la comunidad favorece el acceso a recursos y servicios por lo que su vida cultural y social es activa (70%.Abstract:This research aims to analyze the psychosocial impact caused by the armed conflict both on the individual and the community mental health of 30 women-headed households in a situation of displacement in the State of Quindío. For such a purpose, a characterization card was applied, which showed that 53% of displaced women are not able to control their emotional life, 90% do not have access to social support networks, and 70% do not have positive communication relations within the family. Also, many of them do not have permanent educational opportunities (70% considered themselves excluded and pointed at by the Community (47%. The study indicated that 80% did not request psychological assistance and 67% think that the community favors the access to resources and services, which makes their cultural and social life active (70%

  2. 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.

  3. 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 Document Server

    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.

  4. 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 Document Server

    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.

  5. [Communique on the present status and future of anthropology taken from the meeting of department heads and principle scientists from the Society of Anthropology (GfA)].

    Science.gov (United States)

    Rühli, F; Schiefenhivel, W

    2009-09-01

    The primary goal discussed is to strengthen the scientifically important research discipline of anthropology in the coming years by reinforcing its position in the German university system as a trans-disciplinary field and to edify its image within the public eye. Like many other branches of science, anthropology has witnessed a number of profound changes in the university sphere in recent years. In addition to increased reliance on monetary funding, the fundamental structure of research and teaching in the university sector, the product of centuries-old development, is experiencing a transition phase and progressively operating ever more under the influence of"excellence monitoring" as well as the "Bologna" process. Financial cuts have led to the termination of once fix job positions at all levels, whereby the loss of mid-level positions requisite for a healthy and functional junior academic environment, such as post-doc jobs, is particularly unsettling. The still tangible burden of recent historical events and small number of prominent representatives in the field are problematic, however, the primary concern today involves the seemingly imminent closure of established anthropological centres and discontinuation of department chair positions. Fortunately, this ominous trend does not apply to all leading university departments, many of which are engaged in innovative and novel concepts, and has resulted in their general acceptance and the fortification of anthropology programs. Furthermore, it is becoming increasingly difficult to secure adequate funding for projects from money givers such as the DFG, mainly because of the relatively small size of the field. Specialization within the field at the university level obviously poses a serious problem for such a small holistic discipline (with regards to problem statements and methodology). The definition of anthropology as an entity is complicated by external influences such as newly developing research interests that

  6. 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.

  7. External Beam Therapy (EBT)

    Science.gov (United States)

    ... Esophageal Cancer Treatment Head and Neck Cancer Treatment Lung Cancer Treatment Prostate Cancer Treatment Brain Tumor Treatment Why is ... Radiation Oncology) Breast Cancer Treatment Esophageal Cancer Treatment Lung Cancer Treatment Images related to External Beam Therapy (EBT) Sponsored ...

  8. External Beam Radiation Therapy (EBRT) for Patients with Malignant Pheochromocytoma and Non-Head and Neck Paraganglioma: Combination with 131I-MIBG

    Science.gov (United States)

    Fishbein, Lauren; Bonner, Lara; Torigian, Drew A.; Nathanson, Katherine L.; Cohen, Debbie L.; Pryma, Daniel; Cengel, Keith

    2015-01-01

    In patients with malignant pheochromocytoma and paraganglioma, 131I-MIBG radiotherapy can achieve an objective response rate of 30–50% with the dose limiting toxicity being hematologic. Patients with disseminated disease, who also have a few index bulky or symptomatic lesions, may benefit from the addition of targeted external beam radiotherapy alone or in combination with systemic 131I-MIBG. The records of patients with malignant paraganglioma who were treated with external beam radiotherapy at the University of Pennsylvania from February 1973 to February 2011 were reviewed in an institutional review board approved retrospective study. Of the 17 patients with tumors in the thorax, abdomen, or pelvis, 76% had local control or clinically significant symptomatic relief for at least one year or until death. As expected, the predominant toxicity was due to irradiation of tumor-adjacent normal tissues without clinically significant hematologic toxicity. Due to widespread systemic metastases with areas of bulky, symptomatic tumor, five of the 17 patients were treated with sequential 131I-MIBG (2 mCi/kg per treatment) and external beam radiotherapy to nine sites. In these patients, all areas that were irradiated with external beam radiotherapy showed durable objective response despite all patients eventually experiencing out-of-field systemic progression requiring other treatment. Four of these patients remain alive with excellent performance status 16, 18, 23, and 24 months after external beam radiotherapy. External beam radiotherapy can be highly effective in local management of malignant paraganglioma and can be used in conjunction with 131I-MIBG due to non-overlapping toxicities with excellent control of locally bulky tumors. PMID:22566196

  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. 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.

  11. 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.

  12. 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.

  13. 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.

  14. 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.

  15. 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

  16. 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.

  17. 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.

  18. 18 January 2011 - Ing. Vittorio Malacalza, ASG Superconductors S.p.A, Italy in the LHC superconducting magnet test hall with Deputy Department Head L. Rossi, in the LHC tunnel at Point 5 and CMS experimental area with Spokesperson G. Tonelli.

    CERN Multimedia

    Maximilien Brice

    2011-01-01

    18 January 2011 - Ing. Vittorio Malacalza, ASG Superconductors S.p.A, Italy in the LHC superconducting magnet test hall with Deputy Department Head L. Rossi, in the LHC tunnel at Point 5 and CMS experimental area with Spokesperson G. Tonelli.

  19. 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.

  20. 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.

  1. 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...

  2. Office of Head Start (OHS) Head Start Center Locations Search Tool

    Data.gov (United States)

    U.S. Department of Health & Human Services — Office of Head Start (OHS) web based search tool for finding Head Start program office contact information. Searchable by location, grant number or center type....

  3. Head Lice

    Science.gov (United States)

    ... months of age and older, this medicine offers convenience. Invermectin treats most head lice with just one ... Support AAD Donate Shop AAD Product catalog Store customer service Publications Dermatology World JAAD JAAD Case Reports ...

  4. Head MRI

    Science.gov (United States)

    ... heart valves Heart defibrillator or pacemaker Inner ear (cochlear) implants Kidney disease or dialysis (you may not ... to: Abnormal blood vessels in the brain ( arteriovenous malformations of the head ) Tumor of the nerve that ...

  5. Head Injuries

    Science.gov (United States)

    ... ATV) Safety Balance Disorders Knowing Your Child's Medical History First Aid: Falls First Aid: Head Injuries Preventing Children's Sports Injuries Getting Help: Know the Numbers Concussions Stay Safe: Baseball Concussions Concussions: Getting Better Sports and Concussions Dealing ...

  6. Head Tilt

    Science.gov (United States)

    ... Healthy Living Healthy Living Healthy Living Nutrition Fitness Sports Oral Health Emotional Wellness Growing Healthy Sleep Safety & ... When this happens, the neck muscles go into spasm, causing the head to tilt to one side. ...

  7. 头颈部肿瘤锥形束CT图像不同配准方式误差分析%Head and neck cancer cone beam CT image registration approach error analysis

    Institute of Scientific and Technical Information of China (English)

    吴建益; 许州莹

    2013-01-01

    目的 探讨头颈部肿瘤锥形束CT图像不同配准方式对摆位误差的影响.方法 选取2010年6月至2012年6月应用锥形束CT图像的头颈部肿瘤患者74例,随机分为观察组和对照组,每组各37例.对照组采取手动微调配准方式,观察组采取自动灰度结合手动微调配准方式,比较两组平移误差和旋转误差.结果 观察组头脚方向误差为(-0.02±0.15)mm,左右方向误差为(0.06±0.37)mm,前后方向误差为(0.02±0.21)mm;对照组头脚方向误差为(0.05±0.31)mm,左右方向误差为(0.18±0.62)mm,前后方向误差为(-0.04±0.36)mm.观察组平移误差显著低于对照组,差异有统计学意义(P<0.05);观察组头脚方向误差为(0.41±1.26)°,左右方向误差为(0.13±1.15)°,前后方向误差为(0.14±0.92)°;对照组头脚方向误差为(0.75±2.63)°,左右方向误差为(0.24±1.38)°,前后方向误差为(0.26±1.07)°.观察组旋转误差显著低于对照组,差异有统计学意义(P<0.05).结论 锥形束CT图像采取自动灰度结合手动微调配准方式,可以减少摆位误差,提高治疗精确性、保证治疗质量.%Objective To explore the head and neck tumors cone-beam CT image registration on the setup errors. Methods Select from June 2010 to June 2012 in our hospital cone-beam CT images in patients with head and neck cancer, 74 patients were randomly divided into observation group and control group of 37 cases. The control group was taken to manually trim the quasi-way observation group were compared take automatic grayscale combined with manual micro deployment quasi translation error and rotation error. Results The direction of the head and feet of the observation group error was(-0.02 ±0.15) mm, left and right direction error was (0.06 ±0. 37) mm, the front and rear direction error was (-0.02 ±0.21) mm; control group header feet direction error was (-0.05 ±0.31) mm, left and right direction of the error was (0.18 ±0.62) mm, front and rear

  8. Head Start.

    Science.gov (United States)

    Greenman, Geri

    2000-01-01

    Discusses an art project in which students created drawings of mop heads. Explains that the approach of drawing was more important than the subject. States that the students used the chiaroscuro technique, used by Rembrandt and Caravaggio, in which light appears out of the darkness. (CMK)

  9. Anaphylaxis Due to Head Injury

    Directory of Open Access Journals (Sweden)

    Bruner, Heather C.

    2015-05-01

    Full Text Available Both anaphylaxis and head injury are often seen in the emergency department, but they are rarely seen in combination. We present a case of a 30-year-old woman who presented with anaphylaxis with urticaria and angioedema following a minor head injury. The patient responded well to intramuscular epinephrine without further complications or airway compromise. Prior case reports have reported angioedema from hereditary angioedema during dental procedures and maxillofacial surgery, but there have not been any cases of first-time angioedema or anaphylaxis due to head injury. [West J Emerg Med. 2015;16(3:435–437.

  10. 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

  11. 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.

  12. LHC beam-beam compensation using wires and electron lenses

    CERN Document Server

    Dorda, U; Shiltsev, V; Zimmermann, F

    2007-01-01

    We present weak-strong simulation results for a possible application of current-carrying wires and electron lenses to compensate the LHC long-range and head-on beambeam interaction, respectively, for nominal and PACMAN bunches. We show that these measures have the potential to considerably increase the beam-beam limit, allowing for a corresponding increase in peak luminosity.

  13. 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,"...

  14. Nd:YAG laser bloodless tonsillectomy by fiber optic doppler coupled handpiece beam delivery

    Science.gov (United States)

    Palmieri, Beniamino; Rottigni, Valentina

    2012-09-01

    Laser ablation of palatine tonsils is a relatively new technique recently performed in head and neck surgery departments, in order to treat recurrent tonsillar infections or obstructions from enlarged tonsils. In our study, we have investigated a new procedure using the fiber optic laser beam Nd:YAG to remove up to the 89% of tonsillar tissue, and leaving in place the capsule avoiding any hemorrhagic complication and limiting the pain.

  15. Head Position and Internally Headed Relative Clauses.

    Science.gov (United States)

    Basilico, David

    1996-01-01

    Examines "Head Movement" in internally headed relative clauses (IHRCs). The article shows that in some cases, head movement to an external position need not take place and demonstrates that this movement of the head to a sentence-internal position results from the quantificational nature of IHRCs and Diesing's mapping hypothesis (1990, 1992). (56…

  16. Beam-beam simulation code BBSIM for particle accelerators

    Energy Technology Data Exchange (ETDEWEB)

    Kim, Hyung J.; Sen, Tanaji; /Fermilab

    2011-01-01

    A highly efficient, fully parallelized, six-dimensional tracking model for simulating interactions of colliding hadron beams in high energy ring colliders and simulating schemes for mitigating their effects is described. The model uses the weak-strong approximation for calculating the head-on interactions when the test beam has lower intensity than the other beam, a look-up table for the efficient calculation of long-range beam-beam forces, and a self-consistent Poisson solver when both beams have comparable intensities. A performance test of the model in a parallel environment is presented. The code is used to calculate beam emittance and beam loss in the Tevatron at Fermilab and compared with measurements. They also present results from the studies of stwo schemes proposed to compensate the beam-beam interactions: (a) the compensation of long-range interactions in the Relativistic Heavy Ion Collider (RHIC) at Brookhaven and the Large Hadron Collider (LHC) at CERN with a current carrying wire, (b) the use of a low energy electron beam to compensate the head-on interactions in RHIC.

  17. 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...

  18. [Prof. Maria Byrdy--Doctor Honoris Causa AMB 1990, the founder of the Chair of Forensic Medicine, the first head of the Department of Forensic Medicine, Medical University of Bialystok in 1954-1984].

    Science.gov (United States)

    Janica, Jerzy

    2004-01-01

    The paper portrays the scientific, publicist and teaching activities of Prof. M. Byrdy, with special regard to her residence at the Departments of Forensic Medicine in Cracow (1939-1953) and Bialystok (1954-1984).

  19. Habitat--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 habitat map of the seafloor of the Offshore of Bodega Head map area, California. The vector data file is included in...

  20. 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,...

  1. 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 is...

  2. 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...

  3. 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...

  4. 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...

  5. 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...

  6. “Serving the Homeland is a sacred duty for all religious Muslims” - Interview with Marat-Khazrat Arslanov, Imam, Head of the Department of Military-Patriotic Education of the Council of Muftis of Russia, Moscow, 2 November 2009

    Directory of Open Access Journals (Sweden)

    Elisabeth Sieca-Kozlowski

    2009-12-01

    Full Text Available THE ROLE OF REPRESENTATIVE OF MUSLIM SERVICEMEN PIPSS.ORG - If I’m not mistaken, both the Department of the Council of Muftis of Russia, which is concerned with Muslims in the military service, and the position of Representative of Military Muslims were created at the beginning of the first Chechen war in 1994. What is the role of this representative? What are his functions, and have they evolved with time?Marat-KhazratArslanov: First of all, I wish to say that the department and its function...

  7. 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

  8. Is HEADS in our heads?

    DEFF Research Database (Denmark)

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

    2016-01-01

    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...... care professionals participated. We found only small reported differences between staff and young patients regarding whether home, education, and activity were addressed. However, staff reported twice the rate of addressing smoking, alcohol, illegal drugs, sexuality, and contraception compared to young...... patients. Young patients reported that smoking, alcohol, illegal drugs, sexuality, and contraception were addressed significantly more at adult clinics in comparison to pediatric clinics. After controlling for age, gender and duration of illness, according to young patients, adjusted odds ratios...

  9. 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.

  10. Computed Tomography (CT) -- Head

    Medline Plus

    Full Text Available ... of the Head? What is CT Scanning of the Head? Computed tomography, more commonly known as a ... of page What are some common uses of the procedure? CT scanning of the head is typically ...

  11. Beam characteristics of energy-matched flattening filter free beams

    Energy Technology Data Exchange (ETDEWEB)

    Paynter, D.; Weston, S. J.; Cosgrove, V. P. [St James Institute of Oncology The Leeds Teaching Hospitals NHS Trust, Medical Physics, Leeds LS9 7TF (United Kingdom); Evans, J. A. [LIGHT Institute University of Leeds Leeds LS2 9JT, Division of Medical Physics, Leeds (United Kingdom); Thwaites, D. I. [LIGHT Institute University of Leeds Leeds LS2 9JT, Division of Medical Physics, Leeds, United Kingdom and Institute of Medical Physics, School of Physics, University of Sydney (Australia)

    2014-05-15

    Purpose: Flattening filter free (FFF) linear accelerators can increase treatment efficiency and plan quality. There are multiple methods of defining a FFF beam. The Elekta control system supports tuning of the delivered FFF beam energy to enable matching of the percentage depth-dose (PDD) of the flattened beam at 10 cm depth. This is compared to FFF beams where the linac control parameters are identical to those for the flattened beam. All beams were delivered on an Elekta Synergy accelerator with an Agility multi-leaf collimator installed and compared to the standard, flattened beam. The aim of this study is to compare “matched” FFF beams to both “unmatched” FFF beams and flattened beams to determine the benefits of matching beams. Methods: For the three modes of operation 6 MV flattened, 6 MV matched FFF, 6 MV unmatched FFF, 10 MV flattened, 10 MV matched FFF, and 10 MV unmatched FFF beam profiles were obtained using a plotting tank and were measured in steps of 0.1 mm in the penumbral region. Beam penumbra was defined as the distance between the 80% and 20% of the normalized dose when the inflection points of the unflattened and flattened profiles were normalized with the central axis dose of the flattened field set as 100%. PDD data was obtained at field sizes ranging from 3 cm × 3 cm to 40 cm × 40 cm. Radiation protection measurements were additionally performed to determine the head leakage and environmental monitoring through the maze and primary barriers. Results: No significant change is made to the beam penumbra for FFF beams with and without PDD matching, the maximum change in penumbra for a 10 cm × 10 cm field was within the experimental error of the study. The changes in the profile shape with increasing field size are most significant for the matched FFF beam, and both FFF beams showed less profile shape variation with increasing depth when compared to flattened beams, due to consistency in beam energy spectra across the radiation field

  12. 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.

  13. 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...

  14. 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/...

  15. 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.

  16. 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

  17. 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

  18. 基于头颈部千伏级锥形束CT的剂量计算研究%Dose calculation on kilovoltage cone-beam CT imaging for head and neck radiotherapy

    Institute of Scientific and Technical Information of China (English)

    李奇欣; 柏朋刚; 陈传本; 潘建基; 张秀春; 费召东; 蒋思思

    2011-01-01

    目的 探讨用机载千伏级锥形束CT (CBCT)对鼻咽癌患者治疗前扫描图像直接进行剂量计算的可行性.方法 选取治疗前行扇形束CT (FBCT)和CBCT扫描的11例鼻咽癌患者,将体位校正后重新扫描的CBCT图像传输至治疗计划系统中.在治疗计划系统中将FBCT和CBCT图像融合,将FBCT的计划移植至CBCT上.选择CBCT图像自己的HU-ED校正曲线重新进行剂量计算,与FBCT计划的靶区和正常器官的剂量体积直方图以及等中心层面剂量分布的γ通过率分析(阈值3%/3 mm)结果进行比较.结果 11例鼻咽癌患者中CBCT和FBCT计划的剂量体积直方图相似,等中心层面剂量分布中平均γ通过率为98.0%±1.33%.FBCT计划和CBCT计划的靶区受量差异都<1%,正常组织器官受量差异<2%.结论 治疗过程中得到的CBCT图像能用来进行剂量计算.%Objective To study the feasibility of dose calculation using kilovoltage X-ray cone-beam CT (KVCBCT) imaging for head-and-neck radiation therapy.Methods 11 patients with nasopharyngeal carcinoma were scanned with KVCBCT to adjust position before treatment, and rescanning images with KVCBCT after correction were input a treatment-planning system.The dose was recalculated by applying the patients′ treatment plans based on planning CT to the KVCBCT images.The dose distributions and dose volume histograms (DVH) of the tumor and critical structures were compared with the original treatment plan.Results The DVH and dose distribution of the plan based on the KVCBCT are compared with that of the planning CT, and they shows a good consistency for the 11 cases.The doses calculated from the planning CT and KVCBCT were compared on the isocenter planes.Using γ analysis with a criterion of 3%/3 mm, 98.0%±1.33% of the points on the isocenter planes in the planning CT and KVCBCT.The difference of the dose to target volume was<1% and to normal structure was<2%.Conclusions This study indicated that CBCT images can be used

  19. 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 Document Server

    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.

  20. 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.

  1. 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.

  2. 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

  3. 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.

  4. 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...

  5. Bobbling head in a young subject

    Directory of Open Access Journals (Sweden)

    Kalyan B Bhattacharyya

    2014-01-01

    Full Text Available Bobble-head Doll Syndrome is a rare and unique movement disorder found in children. Clinically, it is characterized by a to and fro or side to side movement of the head at the frequency of 2 to 3 Hz. It is mostly associated with cystic lesions around the third ventricle, choroid plexus papilloma, aqueductal stenosis and other rare disorders. An eleven year old child presented in the outpatient department with continuous to and fro movement of the head and declining vision for the last one month. MRI Scan showed a large contrast-enhanced lesion in the region of the third ventricle along with gross hydrocephalus. Ventriculo-peritoneal shunt was inserted and the movements of the head disappeared completely. Bobble-head doll syndrome is a rare condition and therefore this case is presented and the literature reviewed.

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

    Energy Technology Data Exchange (ETDEWEB)

    Stancari, Giulio

    2014-09-11

    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 compensation in LHC luminosity upgrade scenarios with small crossing angles. At Fermilab, we are planning to install an electron lens in the Integrable Optics Test Accelerator (IOTA, a 40-m ring for 150-MeV electrons) as one of the proof-of-principle implementations of nonlinear integrable optics to achieve large tune spreads and more stable beams without loss of dynamic aperture.

  8. 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

  9. Online measurement of fluence and position for protontherapy beams

    Science.gov (United States)

    Benati, C.; Boriano, A.; Bourhaleb, F.; Cirio, R.; Cirrone, G. A. P.; Cornelius, I.; Cuttone, G.; Donetti, M.; Garelli, E.; Giordanengo, S.; Guérin, L.; La Rosa, A.; Luparia, A.; Marchetto, F.; Martin, F.; Meyroneinc, S.; Peroni, C.; Pittà, G.; Raffaele, L.; Sabini, M. G.; Valastro, L.

    2004-09-01

    Tumour therapy with proton beams has been used for several decades in many centres with very good results in terms of local control and overall survival. Typical pathologies treated with this technique are located in head and neck, eye, prostate and in general at big depths or close to critical organs. The Experimental Physics Department of the University of Turin and the local Section of INFN, in collaboration with INFN Laboratori Nazionali del Sud Catania and Centre de Protontherapie de Orsay Paris, have developed detector systems that allow the measurement of beam position and fluence, obtained in real time during beam delivery. The centre in Catania (CATANA: Centro di AdroTerapia ed Applicazioni Nucleari Avanzate) has been treating patients with eye pathologies since spring 2002 using a superconducting cyclotron accelerating protons up to 62 MeV.This kind of treatments need high-resolution monitor systems and for this reason we have developed a 256-strip segmented ionisation chamber, each strip being 400 μm wide, with a total sensitive area 13×13 cm2. The Centre de Protontherapie de Orsay (CPO) has been operational since 1991 and features a synchrocyclotron used for eye and head and neck tumours with proton beams up to 200 MeV. The monitor system has to work on a large surface and for this purpose we have designed a pixel-segmented ionisation chamber, each pixel being 5×5 mm2, for a total active area of 16×16 cm2. The results obtained with two prototypes of the pixel and strip chambers demonstrate that the detectors allow the measurement of fluence and centre of gravity as requested by clinical specifications.

  10. 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...

  11. 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......, including a detailed protocol for FDG PET in head and neck imaging, physiologic findings, and pitfalls in selected case stories....

  12. Dosimetric differences in flattened and flattening filter-free beam treatment plans

    Directory of Open Access Journals (Sweden)

    Yue Yan

    2016-01-01

    Full Text Available This study investigated the dosimetric differences in treatment plans from flattened and flattening filter-free (FFF beams from the TrueBeam System. A total of 104 treatment plans with static (sliding window intensity-modulated radiotherapy beams and volumetric-modulated arc therapy (VMAT beams were generated for 15 patients involving three cancer sites. In general, the FFF beam provides similar target coverage as the flattened beam with improved dose sparing to organ-at-risk (OAR. Among all three cancer sites, the head and neck showed more important differences between the flattened beam and FFF beam. The maximum reduction of the FFF beam in the mean dose reached up to 2.82 Gy for larynx in head and neck case. Compared to the 6 MV flattened beam, the 10 MV FFF beam provided improved dose sparing to certain OARs, especially for VMAT cases. Thus, 10 MV FFF beam could be used to improve the treatment plan.

  13. Exercise therapy for trismus in head and neck cancer

    NARCIS (Netherlands)

    Dijkstra, P.U.; Sterken, M.W.; Spijkervet, F.K.L.; Roodenburg, J.L.N.; Pater, R.

    2007-01-01

    The aim of this study was to analyze retrospectively effects of exercise therapy on trismus related to head and neck cancer or as a consequence of its treatment, and to compare these effects with trismus not related to head and neck cancer. Medical records of patients referred to the department of p

  14. 21 CFR 882.4460 - Neurosurgical head holder (skull clamp).

    Science.gov (United States)

    2010-04-01

    ... 21 Food and Drugs 8 2010-04-01 2010-04-01 false Neurosurgical head holder (skull clamp). 882.4460 Section 882.4460 Food and Drugs FOOD AND DRUG ADMINISTRATION, DEPARTMENT OF HEALTH AND HUMAN SERVICES... holder (skull clamp). (a) Identification. A neurosurgical head holder (skull clamp) is a device used...

  15. Head protection for horse riders: a cause for concern.

    OpenAIRE

    Muwanga, L C; Dove, A F

    1985-01-01

    We report the frequency with which horse riders with a significant head injury present to a large accident and emergency department. We have also recorded details about the use of headwear and conclude that horse-riding is associated with a serious risk of head injury and 'protective' headwear may not always protect.

  16. Head protection for horse riders: a cause for concern.

    Science.gov (United States)

    Muwanga, L C; Dove, A F

    1985-06-01

    We report the frequency with which horse riders with a significant head injury present to a large accident and emergency department. We have also recorded details about the use of headwear and conclude that horse-riding is associated with a serious risk of head injury and 'protective' headwear may not always protect.

  17. 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...

  18. 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 included...

  19. 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...

  20. 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.

  1. 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...

  2. 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...

  3. 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...

  4. Optimal linear array heading in a directional noise field

    OpenAIRE

    McDonnell, David C.

    1992-01-01

    Approved for public release; distribution is unlimited. This thesis discusses a procedure that optimizes the signal-to-noise ratio (SNR) detected by a linear array in a directional ambient noise field. The SNR can be optimized by minimizing the ambient noise detected by the array. For a given target location, each possible heading of the array centers the ambiguous beam of the array at a different true bearing. Therefore, each heading of the array will receive a different ambient noise lev...

  5. 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.

  6. I Headed the Red Army Women’s Pioneer Corps

    Institute of Scientific and Technical Information of China (English)

    1997-01-01

    Anative of Aocheng city of Ji’an, Jiangxi Province, I joined the revolution in March of 1930. In May that same year, I joined the Communist Youth League. Later, I became head of the women’s department of Youth Communist International (YCI) of the Zhiyang District Committee and also head of the women’s department of the YCI of the Ji’an County Committee. At that time, women were deeply tied up by feudal ethics and followed the three

  7. BEAMS3D Neutral Beam Injection Model

    Science.gov (United States)

    McMillan, Matthew; Lazerson, Samuel A.

    2014-09-01

    With the advent of applied 3D fields in Tokamaks and modern high performance stellarators, a need has arisen to address non-axisymmetric effects on neutral beam heating and fueling. We report on the development of a fully 3D neutral beam injection (NBI) model, BEAMS3D, which addresses this need by coupling 3D equilibria to a guiding center code capable of modeling neutral and charged particle trajectories across the separatrix and into the plasma core. Ionization, neutralization, charge-exchange, viscous slowing down, and pitch angle scattering are modeled with the ADAS atomic physics database. Elementary benchmark calculations are presented to verify the collisionless particle orbits, NBI model, frictional drag, and pitch angle scattering effects. A calculation of neutral beam heating in the NCSX device is performed, highlighting the capability of the code to handle 3D magnetic fields. Notice: this manuscript has been authored by Princeton University under Contract Number DE-AC02-09CH11466 with the US Department of Energy. The United States Government retains and the publisher, by accepting the article for publication, acknowledges that the United States Government retains a non-exclusive, paid-up, irrevocable, world-wide license to publish or reproduce the published form of this manuscript, or allow others to do so, for United States Government purposes.

  8. Magnetic Resonance Imaging (MRI) -- Head

    Medline Plus

    Full Text Available ... MRI of the Head? What is MRI of the Head? Magnetic resonance imaging (MRI) is a noninvasive ... of page What are some common uses of the procedure? MR imaging of the head is performed ...

  9. Ulnar head replacement.

    Science.gov (United States)

    Herbert, Timothy J; van Schoonhoven, Joerg

    2007-03-01

    Recent years have seen an increasing awareness of the anatomical and biomechanical significance of the distal radioulnar joint (DRUJ). With this has come a more critical approach to surgical management of DRUJ disorders and a realization that all forms of "excision arthroplasty" can only restore forearm rotation at the expense of forearm stability. This, in turn, has led to renewed interest in prosthetic replacement of the ulnar head, a procedure that had previously fallen into disrepute because of material failures with early implants, in particular, the Swanson silicone ulnar head replacement. In response to these early failures, a new prosthesis was developed in the early 1990s, using materials designed to withstand the loads across the DRUJ associated with normal functional use of the upper limb. Released onto the market in 1995 (Herbert ulnar head prosthesis), clinical experience during the last 10 years has shown that this prosthesis is able to restore forearm function after ulnar head excision and that the materials (ceramic head and noncemented titanium stem), even with normal use of the limb, are showing no signs of failure in the medium to long term. As experience with the use of an ulnar head prosthesis grows, so does its acceptance as a viable and attractive alternative to more traditional operations, such as the Darrach and Sauve-Kapandji procedures. This article discusses the current indications and contraindications for ulnar head replacement and details the surgical procedure, rehabilitation, and likely outcomes.

  10. 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.

  11. Cross-Sectional Measuring of Optical Beam

    Directory of Open Access Journals (Sweden)

    Tomas David

    2011-01-01

    Full Text Available This article deals with problematic of measuring of optical beam in free space optics (FSO. The professional FSO link was created between two buildings standing 1,5 kilometers apart from each other. Signal passing through the atmospheric media between optical heads is affected. This happens due to effects in atmospheric media. This article describes creating of the device for measuring the intensity of optical beam in 2D space and its subsequent rendering into 3D graph.

  12. Head Lice: Treatment

    Science.gov (United States)

    ... What's this? Submit Button Information For: Parents Schools Listen to audio/Podcast ... Guidelines Treatment for head lice is recommended for persons diagnosed with an active infestation. All household members and other close contacts ...

  13. Computed Tomography (CT) -- Head

    Science.gov (United States)

    ... News Physician Resources Professions Site Index A-Z Computed Tomography (CT) - Head Computed tomography (CT) of the ... images. These images can be viewed on a computer monitor, printed on film or transferred to a ...

  14. Head and Neck Cancers

    Science.gov (United States)

    ... oral cancer ( 12 , 13 ). Preserved or salted foods . Consumption of certain preserved or salted foods during childhood ... head and neck cancers―particularly those who use tobacco―should talk with their doctor about ways that ...

  15. 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 ...

  16. Head and face reconstruction

    Science.gov (United States)

    ... work together. Head and neck surgeons also perform craniofacial reconstruction operations. The surgery is done while you are deep asleep and pain-free (under general anesthesia ). The surgery may take ...

  17. 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; CAT scan - brain ... hold your breath for short periods. A complete scan usually take only 30 seconds to a few ...

  18. 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. ...

  19. 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...

  20. Total body irradiation with a sweeping beam

    Energy Technology Data Exchange (ETDEWEB)

    Pla, M.; Chenery, S.G.; Podgorsak, E.B.

    1983-01-01

    A technique for total body irradiation, in which the patient lies in the prone or supine position in the beam of a conventional column mounted 4 MV linear accelerator, is described. A sufficiently large radiation field is obtained by rotating the beam in a vertical plane about the source (i.e., sweeping beam) at a source-to-skin distance of 190 cm on the vertical axis. The variation of the midplane dose is less than +lt. slash-5% in parallel-opposed beams, when attenuators are placed over the region containing the lungs and bolus is employed around the head and legs. The percentage depth dose for the sweeping beam is identical to that of a stationary beam for the same collimator setting and source-to-skin distance. A method for monitoring the dose to the patient by means of a thimble ionization chamber located on the vertical beam axis is outlined. The average dose rates used are between 5 and 10 cGy/min. The design and placement of lung attenuators is simple. The treatment technique with the sweeping beam requires minimal modification of a treatment unit and can be applied on any unit which has a head swivel option.

  1. The effects of betatron phase advances on beam-beam and its compensation in RHIC

    Energy Technology Data Exchange (ETDEWEB)

    Luo, Y.; Fischer, W.; Gu, X.; Tepikian, S.; Trbojevic, D.

    2011-03-28

    In this article we perform simulation studies to investigate the effects of betatron phase advances between the beam-beam interaction points on half-integer resonance driving term, second order chromaticty and dynamic aperture in RHIC. The betatron phase advances are adjusted with artificial matrices inserted in the middle of arcs. The lattices for the 2011 RHIC polarized proton (p-p) run and 2010 RHIC Au-Au runs are used in this study. We also scan the betatron phase advances between IP8 and the electron lens for the proposed Blue ring lattice with head-on beam-beam compensation.

  2. 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)

  3. Beam collimator

    CERN Multimedia

    1977-01-01

    A four-block collimator installed on a control table for positioning the alignment reference marks. Designed for use with SPS secondary beams, the collimator operates under vacuum conditions. See Annual Report 1976 p. 121 and photo 7701014.

  4. An introduction to beam physics

    CERN Document Server

    Berz, Martin; Wan, Weishi

    2015-01-01

    The field of beam physics touches many areas of physics, engineering, and the sciences. In general terms, beams describe ensembles of particles with initial conditions similar enough to be treated together as a group so that the motion is a weakly nonlinear perturbation of a chosen reference particle. Particle beams are used in a variety of areas, ranging from electron microscopes, particle spectrometers, medical radiation facilities, powerful light sources, and astrophysics to large synchrotrons and storage rings such as the LHC at CERN. An Introduction to Beam Physics is based on lectures given at Michigan State University’s Department of Physics and Astronomy, the online VUBeam program, the U.S. Particle Accelerator School, the CERN Academic Training Programme, and various other venues. It is accessible to beginning graduate and upper-division undergraduate students in physics, mathematics, and engineering. The book begins with a historical overview of methods for generating and accelerating beams, high...

  5. Sensitivity studies of beam directionality, beam size, and neutron spectrum for a fission converter-based epithermal neutron beam for boron neutron capture therapy.

    Science.gov (United States)

    Sakamoto, S; Kiger, W S; Harling, O K

    1999-09-01

    Sensitivity studies of epithermal neutron beam performance in boron neutron capture therapy are presented for realistic neutron beams with varying filter/moderator and collimator/delimiter designs to examine the relative importance of neutron beam spectrum, directionality, and size. Figures of merit for in-air and in-phantom beam performance are calculated via the Monte Carlo technique for different well-optimized designs of a fission converter-based epithermal neutron beam with head phantoms as the irradiation target. It is shown that increasing J/phi, a measure of beam directionality, does not always lead to corresponding monotonic improvements in beam performance. Due to the relatively low significance, for most configurations, of its effect on in-phantom performance and the large intensity losses required to produce beams with very high J/phi, beam directionality should not be considered an important figure of merit in epithermal neutron beam design except in terms of its consequences on patient positioning and collateral dose. Hardening the epithermal beam spectrum, while maintaining the specific fast neutron dose well below the inherent hydrogen capture dose, improves beam penetration and advantage depth and, as a desirable by-product, significantly increases beam intensity. Beam figures of merit are shown to be strongly dependent on beam size relative to target size. Beam designs with J/phi approximately 0.65-0.7, specific fast neutron doses of 2-2.6x10(-13) Gy cm2/n and beam sizes equal to or larger than the size of the head target produced the deepest useful penetration, highest therapeutic ratios, and highest intensities.

  6. 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 ...

  7. Missouri: Early Head Start Initiative

    Science.gov (United States)

    Center for Law and Social Policy, Inc. (CLASP), 2012

    2012-01-01

    Missouri's Early Head Start/Child Care Partnership Project expands access to Early Head Start (EHS) services for children birth to age 3 by developing partnerships between federal Head Start, EHS contractors, and child care providers. Head Start and EHS contractors that participate in the initiative provide services through community child care…

  8. 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.

  9. Particle radiotherapy with carbon ion beams.

    Science.gov (United States)

    Ohno, Tatsuya

    2013-03-04

    Carbon ion radiotherapy offers superior dose conformity in the treatment of deep-seated malignant tumours compared with conventional X-ray therapy. In addition, carbon ion beams have a higher relative biological effectiveness compared with protons or X-ray beams. The algorithm of treatment planning and beam delivery system is tailored to the individual parameters of the patient. The present article reviews the available literatures for various disease sites including the head and neck, skull base, lung, liver, prostate, bone and soft tissues and pelvic recurrence of rectal cancer as well as physical and biological properties.

  10. The EN Department has a new leader

    CERN Multimedia

    CERN Bulletin

    2010-01-01

    Roberto Saban takes over as new Engineering Department leader on 1 July 2010, at a time when the LHC is entering a stable operation phase. Roberto Saban presents his plans and vision.   Roberto Saban, new leader of the EN Department. The CERN Engineering (EN) Department's main areas of activity are technical coordination, the design and operation with beam of accelerator components and experimental facilities, the associated infrastructure systems, such as electrical distribution, cooling, ventilation and transport, and finally the design and construction of mechanical elements for the facilities. “I do not plan to change the internal structure of the Department because it works well but, with the LHC entering a phase of stable functioning, the Department will shift its focus to operation and maintenance. In this new situation, our role is not limited to supporting LHC operation but, on the contrary, we fully take part in it thanks to the synergy with the BE and TE Departments inside th...

  11. Cone beam computed tomography in veterinary dentistry

    NARCIS (Netherlands)

    van Thielen, B.; Siguenza, F.; Hassan, B.

    2012-01-01

    The purpose of this study was to assess the feasibility of cone beam computed tomography (CBCT) in imaging dogs and cats for diagnostic dental veterinary applications. CBCT scans of heads of six dogs and two cats were made. Dental panoramic and multi-planar reformatted (MPR) para-sagittal reconstruc

  12. Pediatric head injury.

    Science.gov (United States)

    Tulipan, N

    1998-01-01

    Pediatric head injury is a public health problem that exacts a high price from patients, their families and society alike. While much of the brain damage in head-injured patients occurs at the moment of impact, secondary injuries can be prevented by aggressive medical and surgical intervention. Modern imaging devices have simplified the task of diagnosing intracranial injuries. Recent advances in monitoring technology have made it easier to assess the effectiveness of medical therapy. These include intracranial pressure monitoring devices that are accurate and safe, and jugular bulb monitoring which provides a continuous, qualitative measure of cerebral blood flow. The cornerstones of treatment remain hyperventilation and osmotherapy. Despite maximal treatment, however, the mortality and morbidity associated with pediatric head injury remains high. Reduction of this mortality and morbidity will likely depend upon prevention rather than treatment.

  13. Head first Ajax

    CERN Document Server

    Riordan, Rebecca M

    2008-01-01

    Ajax is no longer an experimental approach to website development, but the key to building browser-based applications that form the cornerstone of Web 2.0. Head First Ajax gives you an up-to-date perspective that lets you see exactly what you can do -- and has been done -- with Ajax. With it, you get a highly practical, in-depth, and mature view of what is now a mature development approach. Using the unique and highly effective visual format that has turned Head First titles into runaway bestsellers, this book offers a big picture overview to introduce Ajax, and then explores the use of ind

  14. Rocket injector head

    Science.gov (United States)

    Green, C. W., Jr. (Inventor)

    1968-01-01

    A high number of liquid oxygen and gaseous hydrogen orifices per unit area are provided in an injector head designed to give intimate mixing and more thorough combustion. The injector head comprises a main body portion, a cooperating plate member as a flow chamber for one propellant, a cooperating manifold portion for the second propellant, and an annular end plate for enclosing an annular propellant groove formed around the outer edge of the body. All the openings for one propellant are located at the same angle with respect to a radial plane to permit a short combustion chamber.

  15. 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

  16. 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.

  17. Lubricating the swordfish head

    NARCIS (Netherlands)

    Videler, John J.; Haydar, Deniz; Snoek, Roelant; Hoving, Henk-Jan T.; Szabo, Ben G.

    2016-01-01

    The swordfish is reputedly the fastest swimmer on Earth. The concave head and iconic sword are unique characteristics, but how they contribute to its speed is still unknown. Recent computed tomography scans revealed a poorly mineralised area near the base of the rostrum. Here we report, using magnet

  18. Head and Neck Cancer Treatment

    Science.gov (United States)

    ... oncologist will listen to the history of your problem and perform a physical examination. Consultations with other members of the head and neck team, such as the head and neck surgeon, pathologist, ...

  19. Head Lice: Prevention and Control

    Science.gov (United States)

    ... Diseases Laboratory Diagnostic Assistance [DPDx] Parasites Home Prevention & Control Language: English Español (Spanish) Recommend on Facebook Tweet ... that can be taken to help prevent and control the spread of head lice: Avoid head-to- ...

  20. Next HR Department public meeting

    CERN Document Server

    2016-01-01

    Dear Colleagues, I am pleased to invite you to the next public meeting organized by the HR Department, which will take place on Tuesday 28 June at 3 p.m. in the Council Chamber. A drink will be served after the meeting as of 16:30 This meeting will be the opportunity to revisit the specificities of the Career Structure measures and Benchmark Jobs, what they entail and how they will be implemented, and to answer your questions. This meeting is also important for me on a personal note, as I will bid you farewell, at least for a few years, taking special leave as of 1 August 2016 to take up the position of Director-General for Human Resources at the European Central Bank in Frankfurt.  Should you not be able to attend the meeting, it can also be followed via Webcast and the recording will be made available on Indico. I look forward to meeting you. Best regards, Anne-Sylvie Catherin Head of the Human Resources Department

  1. "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.

  2. "Head versus heart"

    OpenAIRE

    2007-01-01

    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 ...

  3. 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…

  4. 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…

  5. Syntactic-Head-Driven Generation

    CERN Document Server

    Koenig, E

    1994-01-01

    The previously proposed semantic-head-driven generation methods run into problems if none of the daughter constituents in the syntacto-semantic rule schemata of a grammar fits the definition of a semantic head given in Shieber et al. 1990. This is the case for the semantic analysis rules of certain constraint-based semantic representations, e.g. Underspecified Discourse Representation Structures (UDRSs) (Frank/Reyle 1992). Since head-driven generation in general has its merits, we simply return to a syntactic definition of `head' and demonstrate the feasibility of syntactic-head-driven generation. In addition to its generality, a syntactic-head-driven algorithm provides a basis for a logically well-defined treatment of the movement of (syntactic) heads, for which only ad-hoc solutions existed, so far.

  6. Beam screens for the LHC beam pipes

    CERN Multimedia

    Patrice Loïez

    1997-01-01

    Cross-section of LHC prototype beam pipes showing the beam screens. Slits in the screens allow residual gas molecules to be pumped out and become frozen to the walls of the ultra-cold beam pipe. Beam screens like these have been designed to line the beam pipes, absorbing radiation before it can hit the magnets and warm them up, an effect that would greatly reduce the magnetic field and cause serious damage.

  7. 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 ...

  8. 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

  9. 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

  10. 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

  11. 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

  12. 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

  13. 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

  14. 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.

  15. Fire Department Emergency Response

    Energy Technology Data Exchange (ETDEWEB)

    Blanchard, A. [Westinghouse Savannah River Company, AIKEN, SC (United States); Bell, K.; Kelly, J.; Hudson, J.

    1997-09-01

    In 1995 the SRS Fire Department published the initial Operations Basis Document (OBD). This document was one of the first of its kind in the DOE complex and was widely distributed and reviewed. This plan described a multi-mission Fire Department which provided fire, emergency medical, hazardous material spill, and technical rescue services.

  16. Chairing a Small Department.

    Science.gov (United States)

    Bowker, Lee H.; Lynch, David M.

    Ten management problems for chairs of small departments in small colleges are discussed, along with problem-solving strategies for these administrators. Serious disagreements within a small and intimate department may create a country club culture in which differences are smoothed over and the personal idiosyncrasies of individual members are…

  17. System, Apparatus and Method Employing a Dual Head Laser

    Science.gov (United States)

    Coyle, Donald B. (Inventor); Stysley, Paul R. (Inventor); Poulios, Demetrios (Inventor)

    2015-01-01

    A system, apparatus and method employing a laser with a split-head, V-assembly gain material configuration. Additionally, the present invention is directed to techniques to better dissipate or remove unwanted energies in laser operations. The present invention is also directed to techniques for better collimated laser beams, with single spatial mode quality (TEM00), with improved efficiency, in extreme environments, such as in outer space.

  18. Organisation of traumatic head injury management in the Nordic countries

    DEFF Research Database (Denmark)

    Sollid, S; Sundstrøm, T; Ingebrigtsen, T;

    2009-01-01

    is a synthesis of two cross-sectional surveys. Questionnaires were used to collect data on the annual number of acute head injury operations, the infrastructure, the level of education, the use of trauma protocols and the management of traumatic head injury at Nordic hospitals. RESULTS: The proportion of acute......OBJECTIVE: The aim of this study is to map and evaluate the available resources and the premises of traumatic head injury management in the Nordic countries, before the implementation of a Nordic adaption of the Brain Trauma Foundation guidelines for prehospital management. METHODS: The study...... head injury operations performed outside a neurosurgical department was 0% in Denmark, 16% in Finland, 19% in Norway and 33% in Sweden. Eighty-four per cent of Nordic hospitals had written protocols for the assessment and treatment of trauma patients and 78% had regular training in trauma management...

  19. Bumblebee Homing: The Fine Structure of Head Turning Movements.

    Directory of Open Access Journals (Sweden)

    Norbert Boeddeker

    Full Text Available Changes in flight direction in flying insects are largely due to roll, yaw and pitch rotations of their body. Head orientation is stabilized for most of the time by counter rotation. Here, we use high-speed video to analyse head- and body-movements of the bumblebee Bombus terrestris while approaching and departing from a food source located between three landmarks in an indoor flight-arena. The flight paths consist of almost straight flight segments that are interspersed with rapid turns. These short and fast yaw turns ("saccades" are usually accompanied by even faster head yaw turns that change gaze direction. Since a large part of image rotation is thereby reduced to brief instants of time, this behavioural pattern facilitates depth perception from visual motion parallax during the intersaccadic intervals. The detailed analysis of the fine structure of the bees' head turning movements shows that the time course of single head saccades is very stereotypical. We find a consistent relationship between the duration, peak velocity and amplitude of saccadic head movements, which in its main characteristics resembles the so-called "saccadic main sequence" in humans. The fact that bumblebee head saccades are highly stereotyped as in humans, may hint at a common principle, where fast and precise motor control is used to reliably reduce the time during which the retinal images moves.

  20. 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.

  1. 28 CFR 71.39 - Appeal to authority head.

    Science.gov (United States)

    2010-07-01

    ... 28 Judicial Administration 2 2010-07-01 2010-07-01 false Appeal to authority head. 71.39 Section 71.39 Judicial Administration DEPARTMENT OF JUSTICE (CONTINUED) IMPLEMENTATION OF THE PROVISIONS OF... appeal shall be stayed automatically pending resolution of the motion for reconsideration. (2) If...

  2. 48 CFR 2807.103 - Agency-head responsibilities.

    Science.gov (United States)

    2010-10-01

    ... 48 Federal Acquisition Regulations System 6 2010-10-01 2010-10-01 true Agency-head responsibilities. 2807.103 Section 2807.103 Federal Acquisition Regulations System DEPARTMENT OF JUSTICE...) Fail to allow ample time for conducting competitive acquisitions; (b) Develop a pattern of...

  3. 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.

  4. Department of Education (DOE)

    Data.gov (United States)

    Social Security Administration — The purpose of this agreement is to assist the U.S. Department of Education in its obligation to ensure that applicants for student financial assistance under Title...

  5. Department of Homeland Security

    Science.gov (United States)

    ... Content Official website of the Department of Homeland Security Contact Us Quick Links Site Map A-Z ... HP - 2016 CISRM HP - 2016 CISRM Critical Infrastructure Security HP - Surge Capacity Force HP - Surge Capacity Force ...

  6. HEADS UP: Sensorimotor control of the head-neck system

    NARCIS (Netherlands)

    Forbes, P.A.

    2014-01-01

    Head-neck stabilization is inherently challenging even when stationary, requiring constant vigilance to counter the downward pull of gravity. It involves a highly complex biomechanical system comprised of a large mass (the head) balanced on top of seven vertebrae (the neck), that are in turn connect

  7. Physicians using ultrasound in Danish emergency departments are mostly summoned specialists

    DEFF Research Database (Denmark)

    Nielsen, Klaus; Lauridsen, Johnny Rene Meilstrup; Laursen, Christian Borbjerg;

    2015-01-01

    -mail to all heads of department. Those departments who responded that ultrasound was available in their department were included in the second part of the study where all physicians working in the ED were contacted and asked to complete a second questionnaire. RESULTS: All 28 eligible EDs participated...

  8. Department of Reactor Technology

    DEFF Research Database (Denmark)

    Risø National Laboratory, Roskilde

    The general development of the Department of Reactor Technology at Risø during 1981 is presented, and the activities within the major subject fields are described in some detail. Lists of staff, publications, and computer programs are included.......The general development of the Department of Reactor Technology at Risø during 1981 is presented, and the activities within the major subject fields are described in some detail. Lists of staff, publications, and computer programs are included....

  9. 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.

  10. 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.

  11. 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...

  12. 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...

  13. 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 set...

  14. 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...

  15. 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)

  16. 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.

  17. Photodynamic therapy in head and neck cancer

    Directory of Open Access Journals (Sweden)

    Kamil H Nelke

    2014-02-01

    Full Text Available Photodynamic therapy (PDT is a special type of treatment involving the use of a photosensitizer or a photosensitizing agent along with a special type of light, which, combined together, induces production of a form of oxygen that is used to kill surrounding cells in different areas of the human body. Specification of the head and neck region requires different approaches due to the surrounding of vital structures. PDT can also be used to treat cells invaded with infections such as fungi, bacteria and viruses. The light beam placed in tumor sites activates locally applied drugs and kills the cancer cells. Many studies are taking place in order to invent better photosensitizers, working on a larger scale and to treat deeply placed and larger tumors. It seems that PDT could be used as an alternative surgical treatment in some tumor types; however, all clinicians should be aware that the surgical approach is still the treatment of choice. PDT is a very accurate and effective therapy, especially in early stages of head and neck squamous cell carcinomas (HNSCC, and can greatly affect surgical outcomes in cancerous patients. We present a detailed review about photosensitizers, their use, and therapeutic advantages and disadvantages.

  18. Ultracold ordered electron beam

    Energy Technology Data Exchange (ETDEWEB)

    Habs, D.; Kramp, J.; Krause, P.; Matl, K.; Neumann, R.; Schwalm, D.

    1988-01-01

    We have started an experimental program to develop an ultracold electron beam, which can be used together with a standard electron cooling device in the Heidelberg Test Storage Ring TSR. In contrast to the standard-type design using electron beam extraction beam extraction from a heated cathode, the ultracold beam is produced by photoemission of electrons from a cooled semiconductor crystal irradiated with an intense near-infrared laser light beam. Adiabatic acceleration is expected to provide ordering of the electron beam itself. Besides the cooling of ion beams to extremely low temperatures, with the aim of obtaining crystallization, the ultracold beam will constitute an excellent target for atomic physics experiments.

  19. Toward a final design for the Birmingham boron neutron capture therapy neutron beam.

    Science.gov (United States)

    Allen, D A; Beynon, T D; Green, S; James, N D

    1999-01-01

    This paper is concerned with the proposed Birmingham accelerator-based epithermal neutron beam for boron neutron capture therapy (BNCT). Details of the final moderator design, such as beam delimiter, shield, and beam exit surface shape are considered. Monte Carlo radiation transport simulations with a head and body phantom have shown that a simple flat moderator beam exit surface is preferable to the previously envisioned spherical design. Dose rates to individual body organs during treatment have been calculated using a standard MIRD phantom. We have shown that a simple polyethylene shield, doped with natural lithium, is sufficient to provide adequate protection to the rest of the body during head irradiations. The effect upon the head phantom dose distributions of the use of such a shield to delimit the therapy beam has been evaluated.

  20. The head-mounted microscope.

    Science.gov (United States)

    Chen, Ting; Dailey, Seth H; Naze, Sawyer A; Jiang, Jack J

    2012-04-01

    Microsurgical equipment has greatly advanced since the inception of the microscope into the operating room. These advancements have allowed for superior surgical precision and better post-operative results. This study focuses on the use of the Leica HM500 head-mounted microscope for the operating phonosurgeon. The head-mounted microscope has an optical zoom from 2× to 9× and provides a working distance from 300 mm to 700 mm. The headpiece, with its articulated eyepieces, adjusts easily to head shape and circumference, and offers a focus function, which is either automatic or manually controlled. We performed five microlaryngoscopic operations utilizing the head-mounted microscope with successful results. By creating a more ergonomically favorable operating posture, a surgeon may be able to obtain greater precision and success in phonomicrosurgery. Phonomicrosurgery requires the precise manipulation of long-handled cantilevered instruments through the narrow bore of a laryngoscope. The head-mounted microscope shortens the working distance compared with a stand microscope, thereby increasing arm stability, which may improve surgical precision. Also, the head-mounted design permits flexibility in head position, enabling operator comfort, and delaying musculoskeletal fatigue. A head-mounted microscope decreases the working distance and provides better ergonomics in laryngoscopic microsurgery. These advances provide the potential to promote precision in phonomicrosurgery.

  1. Eye-based head gestures

    DEFF Research Database (Denmark)

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

    2012-01-01

    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...

  2. Clinical trials in head injury

    NARCIS (Netherlands)

    Narayan, RK; Michel, ME

    2002-01-01

    Traumatic brain injury (TBI) remains a major public health problem globally. In the United States the incidence of closed head injuries admitted to hospitals is conservatively estimated to be 200 per 100,000 population, and the incidence of penetrating head injury is estimated to be 12 per 100,000,

  3. 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 ...

  4. 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...

  5. The Facility for Rare Isotope Beams

    OpenAIRE

    Wrede C.

    2015-01-01

    The Facility for Rare Isotope Beams (FRIB) is a United States Department of Energy user facility currently under construction on the campus of Michigan State University. Based on a 400 kW, 200 MeV/u heavy-ion driver linac, FRIB will deliver high-quality fast, thermalized, and re-accelerated beams of rare isotopes with unprecedented intensities to a variety of experimental areas and equipment. New science opportunities at the frontiers of nuclear structure, nuclear astrophysics, fundamental sy...

  6. 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

  7. Literature in Focus Beta Beams: Neutrino Beams

    CERN Multimedia

    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...

  8. The three dimensional map of dose components in a head phantom for boron neutron capture therapy

    OpenAIRE

    Bavarnegin Elham; Sadremomtaz Alireza; Khalafi Hossein

    2013-01-01

    The in-phantom measurement of physical dose distribution and construction of a convenient phantom is very important for boron neutron capture therapy planning validation. In this study we have simulated a head phantom, suggested for construction in boron neutron capture therapy facilities, and calculated all relevant dose components inside of it using the Monte Carlo code MCNPX. A “generic” epithermal neutron beam with a broad neutron spectrum, similar to beams used for neutron capture ...

  9. The Facility for Rare Isotope Beams

    Directory of Open Access Journals (Sweden)

    Wrede C.

    2015-01-01

    Full Text Available The Facility for Rare Isotope Beams (FRIB is a United States Department of Energy user facility currently under construction on the campus of Michigan State University. Based on a 400 kW, 200 MeV/u heavy-ion driver linac, FRIB will deliver high-quality fast, thermalized, and re-accelerated beams of rare isotopes with unprecedented intensities to a variety of experimental areas and equipment. New science opportunities at the frontiers of nuclear structure, nuclear astrophysics, fundamental symmetries, and societal applications will be enabled by this future world-leading rare-isotope beam facility.

  10. The Facility for Rare Isotope Beams

    Science.gov (United States)

    Wrede, C.

    2015-05-01

    The Facility for Rare Isotope Beams (FRIB) is a United States Department of Energy user facility currently under construction on the campus of Michigan State University. Based on a 400 kW, 200 MeV/u heavy-ion driver linac, FRIB will deliver high-quality fast, thermalized, and re-accelerated beams of rare isotopes with unprecedented intensities to a variety of experimental areas and equipment. New science opportunities at the frontiers of nuclear structure, nuclear astrophysics, fundamental symmetries, and societal applications will be enabled by this future world-leading rare-isotope beam facility.

  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. A Investigation of Radiotherapy Electron Beams Using Monte Carlo Techniques

    Science.gov (United States)

    Ding, George X.

    1995-01-01

    Radiotherapy electron beams are more complicated than photon beams due to variations in the beam production, the scattering of low-energy electrons, and the presence contaminant photons. The detailed knowledge of a radiotherapy beam is essential to an accurate calculation of dose distribution for a treatment planning system. This investigation aims to enhance our understanding of radiotherapy beams by focusing on electron beams used in radiotherapy. It starts with a description of the Monte Carlo simulation code, BEAM, and a detailed simulation of an accelerator head to obtain realistic radiotherapy beams. The simulation covers electron beams from various accelerators, including the NRC research accelerator, the NPL (UK), accelerator, A Varian Clinac 2100C, a Philips SL75-20, a Siemens KD2, an AECL Therac 20, and a Scanditronix MM50. The beam energies range from 4 to 50 MeV. The EGS4 user code, BEAM, is extensively benchmarked against experiment by comparing calculated dose distributions with measured dose distributions in water. The simulated beams are analyzed to obtain the characteristics of various electron beams from a variety of accelerators. The simulated beams are also used as inputs to calculate the following parameters: the mean electron energy, the most probable energy, the energy-range relationships, the depth-scaling factor to convert depths in plastic to water-equivalent depths, the water-to-air stopping-power ratios, and the electron fluence correction factors used to convert dose measured in plastics to dose in water. These parameters are essential for electron beam dosimetry. The results from this study can be applied in cancer clinics to improve the accuracy of the absolute dosimetry. The simulation also provides information about the backscatter into the beam monitor chamber, and predicts the influence on the beam output factors. This investigation presents comprehensive data on the clinical electron beams, and answers many questions which could

  13. Strengthening Science Departments

    Science.gov (United States)

    Campbell, Todd; Melville, Wayne; Bartley, Anthony

    2012-01-01

    Teachers do not work in a vacuum. They are, in most cases, part of a science department in which teachers and the chairperson have important roles in science education reform. Current reform is shaped by national standards documents that emphasize the pedagogical and conceptual importance of best practices framed by constructivism and focused on…

  14. Heads Up: Concussion in Youth Sports

    Medline Plus

    Full Text Available ... Learn More about the Brain and How it Works Order Free Copies of CDC's “Heads Up” Educational ... Up! Prevent Concussions Prevent Head Injuries Sports Safety Students Play Safe Youth Sports Safety PROMOTIONAL MATERIALS "Heads ...

  15. Abusive Head Trauma (Shaken Baby Syndrome)

    Science.gov (United States)

    ... Your 1- to 2-Year-Old 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 ...

  16. 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.

  17. In-air fluence profiles and water depth dose for uncollimated electron beams

    Directory of Open Access Journals (Sweden)

    Toutaoui Abdelkader

    2008-01-01

    Full Text Available Advanced electron beam dose calculation models for radiation treatment planning systems require the input of a phase space beam model to configure a clinical electron beam in a computer. This beam model is a distribution in position, energy, and direction of electrons and photons in a plane in front of the patient. The phase space beam model can be determined by Monte Carlo simulation of the treatment head or from a limited set of measurements. In the latter case, parameters of the electron phase space beam model are obtained by fitting measured to calculated dosimetric data. In the present work, data for air fluence profiles and water depth doses have been presented for electron beams without an applicator for a medical linear accelerator. These data are used to parameterize the electron phase space beam model to a Monte Carlo dose calculation module available in the first commercial (MDS Nordion, now Nucletron Monte Carlo treatment planning for electron beams.

  18. In-air fluence profiles and water depth dose for uncollimated electron beams

    Science.gov (United States)

    Toutaoui, Abedelkadar; Aichouche, Amar Nassim; Adjidir, Kenza Adjidir; Chami, Ahmed Chafik

    2008-01-01

    Advanced electron beam dose calculation models for radiation treatment planning systems require the input of a phase space beam model to configure a clinical electron beam in a computer. This beam model is a distribution in position, energy, and direction of electrons and photons in a plane in front of the patient. The phase space beam model can be determined by Monte Carlo simulation of the treatment head or from a limited set of measurements. In the latter case, parameters of the electron phase space beam model are obtained by fitting measured to calculated dosimetric data. In the present work, data for air fluence profiles and water depth doses have been presented for electron beams without an applicator for a medical linear accelerator. These data are used to parameterize the electron phase space beam model to a Monte Carlo dose calculation module available in the first commercial (MDS Nordion, now Nucletron) Monte Carlo treatment planning for electron beams. PMID:19893707

  19. ISR beam scrapers

    CERN Multimedia

    1972-01-01

    Beam scrapers seen in the direction of the beam. The two horizontal scraper foils are near the centre of the beam pipe andthe two scrapers for protection of the vacuum chamber are further outside. In the lower part of the beam pipe is the vertical halo scraping blade.

  20. Telecommunication using muon beams

    Science.gov (United States)

    Arnold, Richard C.

    1976-01-01

    Telecommunication is effected by generating a beam of mu mesons or muons, varying a property of the beam at a modulating rate to generate a modulated beam of muons, and detecting the information in the modulated beam at a remote location.

  1. 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.

  2. Ultracold Ordered Electron Beam

    Science.gov (United States)

    Habs, D.; Kramp, J.; Krause, P.; Matl, K.; Neumann, R.; Schwalm, D.

    1988-01-01

    We have started an experimental program to develop an ultracold electron beam, which can be used together with a standard electron cooling device in the Heidelberg Test Storage Ring TSR. In contrast to the standard-type design using electron beam extraction from a heated cathode, the ultracold beam is produced by photoemission of electrons from a cooled semiconductor crystal irradiated with an intense near-infrared laser light beam. Adiabatic acceleration is expected to provide ordering of the electron beam itself. Besides the cooling of ion beams to extremely low temperatures, with the aim of obtaining crystallization, the ultracold beam will constitute an excellent target for atomic physics experiments.

  3. 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...

  4. Boxing-related head injuries.

    Science.gov (United States)

    Jayarao, Mayur; Chin, Lawrence S; Cantu, Robert C

    2010-10-01

    Fatalities in boxing are most often due to traumatic brain injury that occurs in the ring. In the past 30 years, significant improvements in ringside and medical equipment, safety, and regulations have resulted in a dramatic reduction in the fatality rate. Nonetheless, the rate of boxing-related head injuries, particularly concussions, remains unknown, due in large part to its variability in clinical presentation. Furthermore, the significance of repeat concussions sustained when boxing is just now being understood. In this article, we identify the clinical manifestations, pathophysiology, and management of boxing-related head injuries, and discuss preventive strategies to reduce head injuries sustained by boxers.

  5. Parabolic scaling beams.

    Science.gov (United States)

    Gao, Nan; Xie, Changqing

    2014-06-15

    We generalize the concept of diffraction free beams to parabolic scaling beams (PSBs), whose normalized intensity scales parabolically during propagation. These beams are nondiffracting in the circular parabolic coordinate systems, and all the diffraction free beams of Durnin's type have counterparts as PSBs. Parabolic scaling Bessel beams with Gaussian apodization are investigated in detail, their nonparaxial extrapolations are derived, and experimental results agree well with theoretical predictions.

  6. 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.

  7. The Corporate Marketing Department

    DEFF Research Database (Denmark)

    Ritter, Thomas; Eggert, Andreas; Münkhoff, Eva

    Corporate marketing has been downsized or eliminated in many firms. At the same time, firms that still own a corporate marketing department struggle with organizing and positioning their commercial front‐end. The question arises whether firms need a corporate marketing department, and if so, how...... it can best add value to the firm. Based on a qualitative study among B2B companies, we develop a conceptual framework highlighting the various parental roles through which corporate marketing can contribute to overall firm and business unit performance. In addition, we identify five gaps that restrain...... successful outcomes of corporate marketing activities. In sum, our framework provides important insights on how to successfully organize corporate marketing activities....

  8. 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 ... Brain Tumor Treatment Magnetic Resonance Imaging (MRI) Safety Alzheimer's Disease Head Injury Brain Tumors Images related to ...

  9. 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).

  10. 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 ...

  11. 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 ...

  12. Heater head for stirling engine

    Science.gov (United States)

    Corey, John A.

    1985-07-09

    A monolithic heater head assembly which augments cast fins with ceramic inserts which narrow the flow of combustion gas and obtains high thermal effectiveness with the assembly including an improved flange design which gives greater durability and reduced conduction loss.

  13. Zero torque gear head wrench

    Science.gov (United States)

    Mcdougal, A. R.; Norman, R. M. (Inventor)

    1976-01-01

    A gear head wrench particularly suited for use in applying torque to bolts without transferring torsional stress to bolt-receiving structures is introduced. The wrench is characterized by a coupling including a socket, for connecting a bolt head with a torque multiplying gear train, provided within a housing having an annulus concentrically related to the socket and adapted to be coupled with a spacer interposed between the bolt head and the juxtaposed surface of the bolt-receiving structure for applying a balancing counter-torque to the spacer as torque is applied to the bolt head whereby the bolt-receiving structure is substantially isolated from torsional stress. As a result of the foregoing, the operator of the wrench is substantially isolated from any forces which may be imposed.

  14. 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 ...

  15. Montessori Head Start Implementation Brief.

    Science.gov (United States)

    Clifford, Alcillia; Kahn, David

    1995-01-01

    Discusses the use of the Montessori method in Head Start programs, focusing on educational environment, teacher training, parent involvement, and funding. Outlines the phased implementation of a Montessori program and provides a list of Montessori publications and organizations. (MDM)

  16. Flat Head Syndrome (Positional Plagiocephaly)

    Science.gov (United States)

    ... symmetrical, but for a variety of reasons the asymmetry becomes less apparent as well. For example, in ... a flattened head does not affect a child's brain growth or cause developmental delays or brain damage. ...

  17. Magnetic Resonance Imaging (MRI) -- Head

    Medline Plus

    Full Text Available ... technologist if you have any devices or metal in your body. Guidelines about eating and drinking before ... imaging test of the head (particularly the brain) in routine clinical practice. top of page What are ...

  18. Magnetic Resonance Imaging (MRI) -- Head

    Medline Plus

    Full Text Available ... it may cause some medical devices to malfunction. Most orthopedic implants pose no risk, but you should ... copied to a CD. Currently, MRI is the most sensitive imaging test of the head (particularly the ...

  19. 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 ...

  20. 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.

  1. Ghost Head Nebula

    Science.gov (United States)

    1999-01-01

    Looking like a colorful holiday card, a new image from NASA's Hubble Space Telescope reveals a vibrant green and red nebula far from Earth. The image of NGC 2080, taken by Hubble's Wide Field and Planetary Camera 2, designed and built by NASA's Jet Propulsion Laboratory, Pasadena, Calif., is available online at http://www.jpl.nasa.gov/images/wfpc . Images like this help astronomers investigate star formation in nebulas. NGC 2080, nicknamed 'The Ghost Head Nebula,' is one of a chain of star-forming regions lying south of the 30 Doradus nebula in the Large Magellanic Cloud. 30 Doradus is the largest star-forming complex in the local group of galaxies. This 'enhanced color' picture is composed of three narrow-band-filter images obtained by Hubble on March 28, 2000. The red and blue light come from regions of hydrogen gas heated by nearby stars. The green light on the left comes from glowing oxygen. The energy to illuminate the green light is supplied by a powerful stellar wind, a stream of high-speed particles coming from a massive star just outside the image. The central white region is a combination of all three emissions and indicates a core of hot, massive stars in this star-formation region. Intense emission from these stars has carved a bowl-shaped cavity in surrounding gas. In the white region, the two bright areas (the 'eyes of the ghost') - named A1 (left) and A2 (right) -- are very hot, glowing 'blobs' of hydrogen and oxygen. The bubble in A1 is produced by the hot, intense radiation and powerful stellar wind from one massive star. A2 contains more dust and several hidden, massive stars. The massive stars in A1 and A2 must have formed within the last 10,000 years, since their natal gas shrouds are not yet disrupted by the powerful radiation of the newborn stars. The Space Telescope Science Institute is operated by the Association of Universities for Research in Astronomy, Inc., for NASA, under contract with the Goddard Space Flight Center, Greenbelt, Md. The

  2. Superior performance of cone beam tomography in detecting a calcaneus fracture.

    Science.gov (United States)

    Lohse, Christian; Catala-Lehnen, Philip; Regier, Marc; Heiland, Max

    2015-01-01

    Cone beam computed tomography is a state-of-the-art imaging tool, initially developed for dental and maxillofacial application. With its high resolution and low radiation dose, cone beam tomography has been expanding its application fields, for example, to diagnosis of traumata and fractures in the head and neck area. In this study, we demonstrate superior and satisfactory performance of cone beam tomography for the imaging of a calcaneus fracture in comparison to conventional X-ray and computed tomography.

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

    Science.gov (United States)

    Sasaki, Kentaro; Kawamura, Norikazu; Tokumaru, Haruki

    2008-04-10

    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.

  4. Characterization of electron contamination in megavoltage photon beams.

    Science.gov (United States)

    Lopez Medina, Antonio; Teijeiro, Antonio; Garcia, Juan; Esperon, Jorge; Terron, J Antonio; Ruiz, Diego P; Carrion, Maria C

    2005-05-01

    The purpose of the present study is to characterize electron contamination in photon beams in different clinical situations. Variations with field size, beam modifier (tray, shaping block) and source-surface distance (SSD) were studied. Percentage depth dose measurements with and without a purging magnet and replacing the air by helium were performed to identify the two electron sources that are clearly differentiated: air and treatment head. Previous analytical methods were used to fit the measured data, exploring the validity of these models. Electrons generated in the treatment head are more energetic and more important for larger field sizes, shorter SSD, and greater depths. This difference is much more noticeable for the 18 MV beam than for the 6 MV beam. If a tray is used as beam modifier, electron contamination increases, but the energy of these electrons is similar to that of electrons coming from the treatment head. Electron contamination could be fitted to a modified exponential curve. For machine modeling in a treatment planning system, setting SSD at 90 cm for input data could reduce errors for most isocentric treatments, because they will be delivered for SSD ranging from 80 to 100 cm. For very small field sizes, air-generated electrons must be considered independently, because of their different energetic spectrum and dosimetric influence.

  5. The Variation of Surface Dose by Beam Spoiler in 10 MV Photon Beam from Linear Accelerator

    Energy Technology Data Exchange (ETDEWEB)

    Bae, Seong Cheol; Kim, Jun Ho; Lee, Choul Soo [Dept. of Radiation Oncology, Kosin University Gospel Hospital, Busan (Korea, Republic of)

    2006-03-15

    The purpose of this study is to find a optimal beam spoiler condition on the dose distribution near the surface, when treating a squamous cell carcinoma of the head and neck and a lymphatic region with 10 MV photon beam. The use of a optimal spoiler allows delivering high dose to a superficial tumor volume, while maintaining the skin-sparing effect in the area between the surface to the depth of 0.4 cm. The lucite beam spoiler, which were a tissue equivalent, were made and placed between the surface and the photon collimators of linear accelerator. The surface-dose, the dose at the depth of 0.4 cm, and the maximum dose at the dmax were measured with a parallel-plate ionization chamber for 5 x 5 cm to 30 x 30 cm{sup 2} field sizes using lucite spoilers with different thicknesses at varying skin-to-spoiler separation (SSS). In the same condition, the dose was measured with bolus and compared with beam spoiler. The spoiler increased the surface and build-up dose and shifted the depth of maximum dose toward the surface. With a 10 MV x-ray beam and a optimal beam spoiler when treating a patient, a similar build-up dose with a 6 MV photon beam could be achieved, while maintaining a certain amount of skin spring. But it was provided higher surface dose under SSS of less than 5 cm, the spoiler thickness of more than 1.8 cm or more, and larger field size than 20 x 20 cm{sup 2} provided higher surface dose like bolus and obliterated the spin-sparing effect. the effects of the beam spoiler on beam profile was reduced with increasing depths. The lucite spoiler allowed using of a 10 MV photon beam for the radiation treatment of head and neck caner by yielding secondary scattered electron on the surface. The dose at superficial depth was increased and the depth of maximum dose was moved to near the skin surface. Spoiling the 10 MV x-ray beam resulted in treatment plans that maintained dose homogeneity without the consequence of increased skin reaction or treat volume underdose

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

    NARCIS (Netherlands)

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

    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

  7. Low current beam techniques

    Energy Technology Data Exchange (ETDEWEB)

    Saint, A.; Laird, J.S.; Bardos, R.A.; Legge, G.J.F. [Melbourne Univ., Parkville, VIC (Australia). School of Physics; Nishijima, T.; Sekiguchi, H. [Electrotechnical Laboratory, Tsukuba (Japan).

    1993-12-31

    Since the development of Scanning Transmission Microscopy (STIM) imaging in 1983 many low current beam techniques have been developed for the scanning (ion) microprobe. These include STIM tomography, Ion Beam Induced Current, Ion Beam Micromachining and Microlithography and Ionoluminense. Most of these techniques utilise beam currents of 10{sup -15} A down to single ions controlled by beam switching techniques This paper will discuss some of the low beam current techniques mentioned above, and indicate, some of their recent applications at MARC. A new STIM technique will be introduced that can be used to obtain Z-contrast with STIM resolution. 4 refs., 3 figs.

  8. Pyramid beam splitter

    Science.gov (United States)

    McKeown, Mark H.; Beason, Steven C.; Fairer, George

    1992-01-01

    The apparatus of the present invention provides means for obtaining accurate, dependable, measurement of bearings and directions for geologic mapping in subterranean shafts, such as, for example, nuclear waste storage investigations. In operation, a laser beam is projected along a reference bearing. A pyramid is mounted such that the laser beam is parallel to the pyramid axis and can impinge on the apex of the pyramid thus splitting the beam several ways into several beams at right angles to each other and at right angles to the reference beam. The pyramid is also translatable and rotatable in a plane perpendicular to the reference beam.

  9. 3rd May 2009 - Japanese Minister of State for Science and Technology Policy, Food Safety, Minister of Consumer Affairs, Minister of Space Policy S. Noda, visiting ATLAS experimental area, LHC tunnel and CERN Control Centre with CERN Director-General R. Heuer, Collaboration Spokesperson F. Gianotti and Beams Department Head P. Collier.

    CERN Multimedia

    Maximilien Brice

    2009-01-01

    090506101-08: signature of the guest book and exchange of gifts; 090506109 + 46-64: Japanese Ambassador to the United Nations Office S. Kitajima, Japanese Minister of State for Science and Technology Policy, Food Safety, Minister of Consumer Affairs, Minister of Space Policy S. Noda, CERN Director-General R. Heuer, Non Member-State relations Adviser J. Ellis and ATLAS Collaboration Spokesperson F. Gianotti visiting the LHC tunnel at Point 1; 090506110-11 + 28-45: Japanese Minister of State for Science and Technology Policy, Food Safety, Minister of Consumer Affairs, Minister of Space Policy S. Noda and his delegation visiting ATLAS experimental area with CERN Japanese users and Management; 090506112 + 86-94: Japanese Minister of State for Science and Technology Policy, Food Safety, Minister of Consumer Affairs, Minister of Space Policy S. Noda, CERN Director-General R. Heuer and Japanese users in front of an LHC superconducting magnet; sLHC Project Leader also present. 090506113-19: Arrival of Japanese Min...

  10. Department of Energy Technology.

    Science.gov (United States)

    1988-03-01

    I-AL95 6A4~LA 1 UWCL*SSZFZKD F/G LO/1 H?. . 12 113l2i 2 -lll 1 36 II IIlIg.- I1I25 11UG’-- 11.6 L 0 tRiso -R-559 Department of N Energy Technology...of neutron flux distribution and absolute thermal flux. - Neutron activation analysis . - Gamma spectroscopy with scintillation detector. - Measurements...Electric design, and a very detailed experimental program has been conduc’ed for the two first fuel cycles (General Electric, 1976 ), yielding a unique

  11. [Illustrations of visceral referred pain. "Head-less" Head's zones].

    Science.gov (United States)

    Henke, C; Beissner, F

    2011-04-01

    Reviewing anatomical, physiological and neurological standard literature for illustrations of referred visceral pain only one type of illustration can frequently be found, which is referred to as Treves and Keith. In fact, the original illustration as a model for most current pictures stems from the German edition of Sir Frederick Treves' famous book "Surgical Applied Anatomy" from 1914, which was reillustrated for didactical reasons for the German readership. While neither Treves and Keith nor the German illustrator Otto Kleinschmidt ever published any work on referred pain this illustration must have been adapted or copied from older sources by the illustrator. Therefore the comprehensive systematic original works before 1914 were reviewed, namely those of Sir Henry Head and Sir James Mackenzie. Due to the name of the phenomenon in the German literature of Head's zones, the illustrations were expected to be based mainly on Head's work. However, a comparison of all available illustrations led to the conclusion that Kleinschmidt chiefly used information from Mackenzie as a model for his illustration. Due to the inexact reproduction of Mackenzie's work by the illustrator some important features were lost that had been reported by the original authors. These include the phenomenon of Head's maximum points, which nowadays has fallen into oblivion.Therefore current charts, based on the illustration by Kleinschmidt from 1914, lack experimental evidence and appear to be a simplification of the observational results of both Head's and Mackenzie's original systematic works.

  12. 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.

  13. 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 ...

  14. Correction of the Long-Range Beam-Beam Effect in LHC using Electro-Magnetic Lenses

    CERN Document Server

    Koutchouk, Jean-Pierre

    2001-01-01

    The beams in LHC collide head-on in at most four experimental points. Due to the small bunch spacing, the beams experience more than one hundred 'near-misses' on either side of the collision points. The transverse beam separation at these places, limited by the quadrupole aperture, is in the range of 7 to 13 sigma. The non-linear part of these 'long-range' interactions appears to be the dominant mechanism for beam blow-up or beam loss in simulation. A simple non-linear model of the long-range interactions can be devised. It shows that the latter may be locally corrected with good accuracy using wires as correcting lenses. The non-linearity measured by the tune footprint is reduced by one order of magnitude. Pulsing the correcting lenses cancels the so-called PACMAN effect.

  15. 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.

  16. 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).

  17. Fast Electron Beam Simulation and Dose Calculation

    CERN Document Server

    Trindade, A; Peralta, L; Lopes, M C; Alves, C; Chaves, A

    2003-01-01

    A flexible multiple source model capable of fast reconstruction of clinical electron beams is presented in this paper. A source model considers multiple virtual sources emulating the effect of accelerator head components. A reference configuration (10 MeV and 10x10 cm2 field size) for a Siemens KD2 linear accelerator was simulated in full detail using GEANT3 Monte Carlo code. Our model allows the reconstruction of other beam energies and field sizes as well as other beam configurations for similar accelerators using only the reference beam data. Electron dose calculations were performed with the reconstructed beams in a water phantom and compared with experimental data. An agreement of 1-2% / 1-2 mm was obtained, equivalent to the accuracy of full Monte Carlo accelerator simulation. The source model reduces accelerator simulation CPU time by a factor of 7500 relative to full Monte Carlo approaches. The developed model was then interfaced with DPM, a fast radiation transport Monte Carlo code for dose calculati...

  18. 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.)

  19. Design for an accelerator-based orthogonal epithermal neutron beam for boron neutron capture therapy.

    Science.gov (United States)

    Allen, D A; Beynon, T D; Green, S

    1999-01-01

    This paper is concerned with the proposed Birmingham accelerator-based epithermal neutron beam for boron neutron capture therapy (BNCT). In particular, the option of producing a therapy beam at an orthogonal direction to the incoming protons is considered. Monte Carlo radiation transport simulations, both with and without a head phantom, have shown that an orthogonal beam geometry is not only acceptable but is indeed beneficial, in terms of a lower mean neutron energy and an enhanced therapeutic ratio for the same useful neutron fluence in the therapy beam. Typical treatment times for various beam options have been calculated, and range from 20 to 48 min with a 5 mA beam of 2.8 MeV protons, if the maximum photon-equivalent dose delivered to healthy tissue is to be 12.6 Gy Eq. The effects of proton beam diameter upon the therapy beam parameters have also been considered.

  20. Successful Beam-Beam Tuneshift Compensation

    Energy Technology Data Exchange (ETDEWEB)

    Bishofberger, Kip Aaron [Univ. of California, Los Angeles, CA (United States)

    2005-01-01

    The performance of synchrotron colliders has been limited by the beam-beam limit, a maximum tuneshift that colliding bunches could sustain. Due to bunch-to-bunch tune variation and intra-bunch tune spread, larger tuneshifts produce severe emittance growth. Breaking through this constraint has been viewed as impossible for several decades. This dissertation introduces the physics of ultra-relativistic synchrotrons and low-energy electron beams, with emphasis placed on the limits of the Tevatron and the needs of a tuneshift-compensation device. A detailed analysis of the Tevatron Electron Lens (TEL) is given, comparing theoretical models to experimental data whenever possible. Finally, results of Tevatron operations with inclusion of the TEL are presented and analyzed. It is shown that the TEL provides a way to shatter the previously inescapable beam-beam limit.

  1. On the detector arrangement for in-beam PET for hadron therapy monitoring.

    Science.gov (United States)

    Crespo, Paulo; Shakirin, Georgy; Enghardt, Wolfgang

    2006-05-07

    In-beam positron emission tomography (in-beam PET) is currently the only method for an in situ monitoring of highly tumour-conformed charged hadron therapy. At the experimental carbon ion tumour therapy facility, running at the Gesellschaft für Schwerionenforschung, Darmstadt, Germany, all treatments have been monitored by means of a specially adapted dual-head PET scanner. The positive clinical impact of this project triggered the construction of a hospital-based hadron therapy facility, with in-beam PET expected to monitor more delicate radiotherapeutic situations. Therefore, we have studied possible in-beam PET improvements by optimizing the arrangement of the gamma-ray detectors. For this, a fully 3D, rebinning-free, maximum likelihood expectation maximization algorithm applicable to several closed-ring or dual-head tomographs has been developed. The analysis of beta(+)-activity distributions simulated from real-treatment situations and detected with several detector arrangements allows us to conclude that a dual-head tomograph with narrow gaps yields in-beam PET images with sufficient quality for monitoring head and neck treatments. For monitoring larger irradiation fields, e.g. treatments in the pelvis region, a closed-ring tomograph was seen to be highly desirable. Finally, a study of the space availability for patient and bed, tomograph and beam portal proves the implementation of a closed-ring detector arrangement for in-beam PET to be feasible.

  2. Beam angle selection incorporation of anatomical heterogeneities for pencil beam scanning charged-particle therapy

    Science.gov (United States)

    Toramatsu, Chie; Inaniwa, Taku

    2016-12-01

    In charged particle therapy with pencil beam scanning (PBS), localization of the dose in the Bragg peak makes dose distributions sensitive to lateral tissue heterogeneities. The sensitivity of a PBS plan to lateral tissue heterogeneities can be reduced by selecting appropriate beam angles. The purpose of this study is to develop a fast and accurate method of beam angle selection for PBS. The lateral tissue heterogeneity surrounding the path of the pencil beams at a given angle was quantified with the heterogeneity number representing the variation of the Bragg peak depth across the cross section of the beams using the stopping power ratio of body tissues with respect to water. To shorten the computation time, one-dimensional dose optimization was conducted along the central axis of the pencil beams as they were directed by the scanning magnets. The heterogeneity numbers were derived for all possible beam angles for treatment. The angles leading to the minimum mean heterogeneity number were selected as the optimal beam angle. Three clinical cases of head and neck cancer were used to evaluate the developed method. Dose distributions and their robustness to setup and range errors were evaluated for all tested angles, and their relation to the heterogeneity numbers was investigated. The mean heterogeneity number varied from 1.2 mm-10.6 mm in the evaluated cases. By selecting a field with a low mean heterogeneity number, target dose coverage and robustness against setup and range errors were improved. The developed method is simple, fast, accurate and applicable for beam angle selection in charged particle therapy with PBS.

  3. 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.

  4. High energy beam lines

    Science.gov (United States)

    Marchetto, M.; Laxdal, R. E.

    2014-01-01

    The ISAC post accelerator comprises an RFQ, DTL and SC-linac. The high energy beam lines connect the linear accelerators as well as deliver the accelerated beams to two different experimental areas. The medium energy beam transport (MEBT) line connects the RFQ to the DTL. The high energy beam transport (HEBT) line connects the DTL to the ISAC-I experimental stations (DRAGON, TUDA-I, GPS). The DTL to superconducting beam (DSB) transport line connects the ISAC-I and ISAC-II linacs. The superconducting energy beam transport (SEBT) line connects the SC linac to the ISAC-II experimental station (TUDA-II, HERACLES, TIGRESS, EMMA and GPS). All these lines have the function of transporting and matching the beams to the downstream sections by manipulating the transverse and longitudinal phase space. They also contain diagnostic devices to measure the beam properties.

  5. Five departments recognized with 2008 University Exemplary Department Award

    OpenAIRE

    Owczarski, Mark

    2008-01-01

    The Department of Computer Science in the College of Engineering, the School of Architecture + Design in the College of Architecture and Urban Studies, the College of Liberal Arts and Human Sciences' Undergraduate Research Institute, and a pair of departments working together, the Department of History and the Department of Teaching and Learning in the School of Education, will all receive the 2008 University Exemplary Department Award at a ceremony to be held Tuesday, Dec. 2 at The Inn at Vi...

  6. [Presentation of the Department and Clinic of Dermatology and Venereology].

    Science.gov (United States)

    Poljacki, Mirjana; Duran, Verica; Jovanović, Marina; Stojanović, Slobodan

    2007-01-01

    THE DEPARTMENT OF DERMATOVENEROLOGY: The Department of Dermatovenereology was established in 1963, as part of the Department of Internal Medicine with Professor Dimitrije Stanulović as its head. Since 1983, it has been an independent department of the Faculty of Medicine in Novi Sad. DEPARTMENT ACTIVITIES: The Department participates in undergraduate education of medical and dentistry students (serbian and english language), advanced training of graduate students specializing in dermatovenereology, general medicine, urgent and occupational medicine, pediatrics and subspecialists of oncology. During the period 1969-1999, the Department was included in work of the Department of Dermatovenereology of the Faculty of Medicine in Banja Luka. THE DEPARTMENT HISTORY: The Department of Dermatovenereology of the City Hospital in Novi Sad was founded in the 5th decade of the 20th century, and it was situated in Kisacka street, near the railway station. It became an independent institution: Dermatovenereology Clinic in 1963, part of the Clinical Center of Vojvodina in Novi Sad. THE DERMATOVENEREOLOGY CLINIC TODAY: The Dermatovenereology Clinic is a teaching facility, but also an institution for prevention, diagnosis and therapy of skin diseases of adnexal structures (sebaceous and sweat glands, hair, nails) and sexually transmitted diseases. The Clinic works both as an outpatient and an inpatient facility with male and female wings.

  7. Bistable Head Positioning Arm Latch

    Science.gov (United States)

    Wasson, Ken; Endo, Juro; Mita, Masahiro; Abelein, Nathan

    A simple, low cost, yet effective device has been developed for immobilizing the head-arm assembly in a disk drive or similar mechanism during power-off conditions. The latching scheme also provides a consistent means of releasing the head-arm assembly from the immobilized position upon power up of the disk drive. The latch uses no electrical power in either immobilized or released state. This design is immune to extreme torque and linear shock forces applied to the disk drive case. The latch system can use the energy stored in the spinning disks to drive the head-arm assembly toward a safe position while simultaneously arming the latch mechanism to secure the head-arm assembly in the safe position upon arrival. A low energy five msec pulse of current drives the latch from one state to the other. Solenoids as presently used in latch mechanisms are bulky, expensive, have variable force characteristics, and often generate contaminants. The latch described in this paper is expected to replace such solenoids. It may also replace small magnet latches, which have limited latch force and apply unwanted torque to a proximate head positioning arm.

  8. 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...

  9. Empirical model for controlling beam-beam effects in ISABELLE

    Energy Technology Data Exchange (ETDEWEB)

    Parzen, G

    1980-01-01

    The beam-beam interaction may limit the beam intensity in ISABELLE. Although considerable progress has been made in understanding the beam-beam interaction, there appears to be no reliable method at present for computing the effects of the beam-beam interaction. The steps taken at ISABELLE to limit beam-beam effects are based largely on the experience accumulated at the ISR. At the ISR, the beam-beam effects do not appear to be large, and the beam intensity at the ISR does not appear to be limited by beam-beam effects. The beam-beam effects may be much stronger in ISABELLE because of factors like higher intensity and stronger non-linearities.

  10. Beam Dynamics for ARIA

    CERN Document Server

    Ekdahl, Carl

    2015-01-01

    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.

  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. 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.

  13. Electron Beam Ion Sources

    OpenAIRE

    Zschornacka, G.; Schmidt, M.; Thorn, A.

    2014-01-01

    Electron beam ion sources (EBISs) are ion sources that work based on the principle of electron impact ionization, allowing the production of very highly charged ions. The ions produced can be extracted as a DC ion beam as well as ion pulses of different time structures. In comparison to most of the other known ion sources, EBISs feature ion beams with very good beam emittances and a low energy spread. Furthermore, EBISs are excellent sources of photons (X-rays, ultraviolet, extreme ultraviole...

  14. Initial Tests of a Plasma Beam Combiner at NIF

    Science.gov (United States)

    Kirkwood, R. K.; Turnbull, D. P.; Chapman, T. D.; Wilks, S. C.; London, R. A.; Berger, R. L.; Michel, P. A.; Divol, L.; Dunlop, W. H.; MacGowan, B. J.; Fournier, K. B.; Blue, B. E.; NIF Team

    2016-10-01

    The seeded forward SBS process that is known to effectively amplify beams in ignition targets has recently been used to design and test a target to combine the power and energy of many beams of the NIF facility into a single beam by intersecting them in an ionized gas. The demand for high-power beams for a variety of applications at NIF makes a demonstration of this process attractive. We will describe experiments using a gas-filled balloon heated by 10 quads of beams, and pumped by additional frequency-tuned quads to amplify a single beam. The beam energy is indicated by gated x-ray images of both the spots produced by the transmitted pump and probe beams and the spot produced by a non-interacting quad of beams when they terminate on a foil. The first experiment produced a high brightness seed beam with significant reductions in brightness of the pumping beams, consistent with their depletion by energy transfer to the seed. Additional experiments studying spot brightness with varying pump power to determine total delivered seed beam energy and power will be discussed as available. This work was performed under the auspices of the U.S. Department of Energy by Lawrence Livermore National Laboratory under Contract DE-AC52-07NA27344.

  15. 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…

  16. Beam injection into RHIC

    Energy Technology Data Exchange (ETDEWEB)

    Fischer, W.; Hahn, H.; MacKay, W.W.; Satogata, T.; Tsoupas, N.; Zhang, W.

    1997-07-01

    During the RHIC sextant test in January 1997 beam was injected into a sixth of one of the rings for the first time. The authors describe the injection zone and its bottlenecks. They report on the commissioning of the injection system, on beam based measurements of the kickers and the application program to steer the beam.

  17. An Electromagnetic Beam Converter

    DEFF Research Database (Denmark)

    2009-01-01

    The present invention relates to an electromagnetic beam converter and a method for conversion of an input beam of electromagnetic radiation having a bell shaped intensity profile a(x,y) into an output beam having a prescribed target intensity profile l(x',y') based on a further development...

  18. The development and role of megavoltage cone beam computerized tomography in radiation oncology

    Science.gov (United States)

    Morin, Olivier

    External beam radiation therapy has now the ability to deliver doses that conform tightly to a tumor volume. The steep dose gradients planned in these treatments make it increasingly important to reproduce the patient position and anatomy at each treatment fraction. For this reason, considerable research now focuses on in-room three-dimensional imaging. This thesis describes the first clinical megavoltage cone beam computed tomography (MVCBCT) system, which utilizes a conventional linear accelerator equipped with an amorphous silicon flat panel detector. The document covers the system development and investigation of its clinical applications over the last 4-5 years. The physical performance of the system was evaluated and optimized for soft-tissue contrast resolution leading to recommendations of imaging protocols to use for specific clinical applications and body sites. MVCBCT images can resolve differences of 5% in electron density for a mean dose of 9 cGy. Hence, the image quality of this system is sufficient to differentiate some soft-tissue structures. The absolute positioning accuracy with MVCBCT is better than 1 mm. The accuracy of isodose lines calculated using MVCBCT images of head and neck patients is within 3% and 3 mm. The system shows excellent stability in image quality, CT# calibration, radiation exposure and absolute positioning over a period of 8 months. A procedure for MVCBCT quality assurance was developed. In our clinic, MVCBCT has been used to detect non rigid spinal cord distortions, to position a patient with a paraspinous tumor close to metallic hardware, to position prostate cancer patients using gold markers or soft-tissue landmarks, to monitor head and neck anatomical changes and their dosimetric consequences, and to complement the convention CT for treatment planning in presence of metallic implants. MVCBCT imaging is changing the clinical practice of our department by increasingly revealing patient-specific errors. New verification

  19. 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.

  20. Quantification of beam complexity in intensity-modulated radiation therapy treatment plans

    Energy Technology Data Exchange (ETDEWEB)

    Du, Weiliang, E-mail: wdu@mdanderson.org; Cho, Sang Hyun; Zhang, Xiaodong; Kudchadker, Rajat J. [Department of Radiation Physics, The University of Texas MD Anderson Cancer Center, Houston, Texas 77030 (United States); Hoffman, Karen E. [Department of Radiation Oncology, The University of Texas MD Anderson Cancer Center, Houston, Texas 77030 (United States)

    2014-02-15

    Purpose: Excessive complexity in intensity-modulated radiation therapy (IMRT) plans increases the dose uncertainty, prolongs the treatment time, and increases the susceptibility to changes in patient or target geometry. To date, the tools for quantitative assessment of IMRT beam complexity are still lacking. In this study, The authors have sought to develop metrics to characterize different aspects of beam complexity and investigate the beam complexity for IMRT plans of different disease sites. Methods: The authors evaluated the beam complexity scores for 65 step-and-shoot IMRT plans from three sites (prostate, head and neck, and spine) and 26 volumetric-modulated arc therapy (VMAT) plans for the prostate. On the basis of the beam apertures and monitor unit weights of all segments, the authors calculated the mean aperture area, extent of aperture shape irregularity, and degree of beam modulation for each beam. Then the beam complexity values were averaged to obtain the complexity metrics of the IMRT plans. The authors studied the correlation between the beam complexity metrics and the quality assurance (QA) results. Finally, the effects of treatment planning parameters on beam complexity were studied. Results: The beam complexity scores were not uniform among the prostate IMRT beams from different gantry angles. The lateral beams had larger monitor units and smaller shape irregularity, while the anterior-posterior beams had larger modulation values. On average, the prostate IMRT plans had the smallest aperture irregularity, beam modulation, and normalized monitor units; the head and neck IMRT plans had large beam irregularity and beam modulation; and the spine stereotactic radiation therapy plans often had small beam apertures, which may have been associated with the relatively large discrepancies between planned and QA measured doses. There were weak correlations between the beam complexity scores and the measured dose errors. The prostate VMAT beams showed

  1. Segmentation process significantly influences the accuracy of 3D surface models derived from cone beam computed tomography

    NARCIS (Netherlands)

    Fourie, Zacharias; Damstra, Janalt; Schepers, Rutger H; Gerrits, Pieter; Ren, Yijin

    2012-01-01

    AIMS: To assess the accuracy of surface models derived from 3D cone beam computed tomography (CBCT) with two different segmentation protocols. MATERIALS AND METHODS: Seven fresh-frozen cadaver heads were used. There was no conflict of interests in this study. CBCT scans were made of the heads and 3D

  2. 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

  3. 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.

  4. 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,...

  5. 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...

  6. Alternative modes for optical trapping and manipulation using counter-propagating shaped beams

    DEFF Research Database (Denmark)

    Palima, Darwin; Lindballe, T.B.; Kristensen, M.V.;

    2011-01-01

    -propagating shaped-beam traps that depart from the conventional geometry based on symmetric, coaxial counter-propagating beams. We show that projecting shaped beams with separation distances previously considered axially unstable can, in fact, enhance the axial and transverse trapping stiffnesses. We also show...

  7. Refractive beam shapers for focused laser beams

    Science.gov (United States)

    Laskin, Alexander; Laskin, Vadim; Ostrun, Aleksei

    2016-09-01

    Focusing of laser radiation is most often used approach in various industrial micromachining applications like scribing, PCB drilling, and is important in scientific researches like laser heating in geophysics experiments with diamond anvil cells (DAC). Control of intensity distribution in focal spot is important task since optimum intensity profiles are rather flat-top, doughnut or "inverse-Gauss" than typical for lasers Gaussian profile. Because of high intensity of modern CW and pulsed lasers it is advisable to use refractive beam shaping optics with smooth optical surfaces providing high radiation resistance. Workable optical solutions can be built on the base of diffraction theory conclusion that flat-top intensity profile in focal plane of a lens is created when input beam has Airy-disk intensity distribution. It is suggested to apply refractive beam shapers converting, with minimum wavefront deformation, Gaussian profile of TEM00 beam to a beam with Airy disk intensity distribution, thereby optimizing conditions of interference near the focal plane of a lens after the beam shaper and providing flat-top, doughnut, "inverse-Gauss" profiles. This approach allows operation with CW and ultra-short pulse lasers, using F-theta lenses and objectives, mirror scanners, provides extended depth of field similar to Rayleigh length of comparable TEM00 beam, easy integration in industrial equipment, simple adjustment procedure and switching between profiles, telescope and collimator implementations. There will be considered design basics of beam shapers, analysis of profile behaviour near focal plane, examples of implementations in micromachining systems and experimental DAC setups, results of profile measurements and material processing.

  8. 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.

  9. Neuroelectromagnetic Forward Head Modeling Toolbox

    Science.gov (United States)

    Acar, Zeynep Akalin; Makeig, Scott

    2014-01-01

    This paper introduces a Neuroelectromagnetic Forward Head Modeling Toolbox (NFT) running under MATLAB (The Mathworks, Inc.) for generating realistic head models from available data (MRI and/or electrode locations) and for computing numerical solutions for the forward problem of electromagnetic source imaging. The NFT includes tools for segmenting scalp, skull, cerebrospinal fluid (CSF) and brain tissues from T1-weighted magnetic resonance (MR) images. The Boundary Element Method (BEM) is used for the numerical solution of the forward problem. After extracting segmented tissue volumes, surface BEM meshes can be generated. When a subject MR image is not available, a template head model can be warped to measured electrode locations to obtain an individualized head model. Toolbox functions may be called either from a graphic user interface compatible with EEGLAB (http://sccn.ucsd.edu/eeglab), or from the MATLAB command line. Function help messages and a user tutorial are included. The toolbox is freely available under the GNU Public License for noncommercial use and open source development. PMID:20457183

  10. The Animal Without A Head

    Institute of Scientific and Technical Information of China (English)

    万钧

    2002-01-01

    Have you ever seen an animal with out a head?there is such an animal! it has no tail or legs ,its body is full of holes it eats and breathes but never moves,it lives under water,the water brings the animal air.

  11. 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 ... the limitations of MRI of the Head? High-quality images are assured only if you are able ...

  12. Hypoglycemia in Emergency Department

    Institute of Scientific and Technical Information of China (English)

    Yu-Jang Su; Chia-Jung Liao

    2015-01-01

    Objective:To study the epidemiology, etiologies and prognostic factors of hypoglycemia. Methods:A retrospective chart review of hypoglycemic cases from December, 2009 to February, 2012 was conducted to gather the following patient data: age, gender, vital signs at triage, white blood cell count, serum glucose, C-reactive protein, glutamic oxaloacetic transaminase, creatinine, sodium, potassium, past history of liver cirrhosis, uremia, concomitant infection, concomitant cancer/malignancy, length of stay, lack of recent meal, status of acute renal failure and concomitant stroke. A total of 186 cases were enrolled in our study. We analyzed the data using commercial statistics software (SPSS for Windows, version 11.0, SPSS Inc., Chicago, IL). We used the Student's t-test andχ2 test for the statistical analyses, and significance was set at a P value less than 0.05. Results: Hypoglycemia is related to several co-morbidities. In total, 10.2%of the patients had liver cirrhosis and 7.0% had uremia. More than half (55.4%) were bacterial infection during hospitalization. Acute renal failure accounted for 26.3%of the hypoglycemic episodes. In addition to the etiology of infection, the lack of a recent meal accounted for 44.6%hypoglycemic episodes. A total of 2.2%of the cases resulted from an acute cerebrovascular accident. Approximately 8.6%were concomitant with malignancy. Conclusions: When hypoglycemic patients present in the emergency department, physicians should pay attention to the presence of infection, malignancy, liver diseases (liver cirrhosis and biliary tract infection), and acute renal failure.

  13. Verification of the Mechanism of the Head-Positioning Error Caused by Disk Flutter and Slider Supporting Structure for Reducing Head-Positioning Error

    Science.gov (United States)

    Imai, Satomitsu

    In magnetic disk drives, the disk flutter due to high-rotational speed causes the increase of the head-positioning error. It is important to clear the mechanism of the head-positioning error caused by the disk flutter. This paper conducts the experiments to verify the mechanism proposed in the former report. The experiment was conducted by comparing the head-positioning error predicted by the proposed mechanism with the measured head-positioning error signal. It is confirmed that the proposed mechanism can predict the head-positioning error within the 10% error. The former reports also said that the flutter transfer ratio defined in the report could decrease the head-positioning error without reducing the amplitude of the disk flutter. This paper also verifies it experimentally. In the experiment, the thickness of the slider was changed to make the flutter transfer ratio small. This paper also proposes the method of making the beam angle of the gimbal slant to make the flutter transfer ratio small. The effectiveness was confirmed by the simulation.

  14. Porcine head response to blast

    Directory of Open Access Journals (Sweden)

    Jay eShridharani

    2012-05-01

    Full Text Available Recent studies have shown an increase in the frequency of traumatic brain injuries related to blast exposure. However, the mechanisms that cause blast neurotrauma are unknown. Blast neurotrauma research using computational models has been one method to elucidate that response of the brain in blast, and to identify possible mechanical correlates of injury. However, model validation against experimental data is required to ensure that the model output is representative of in vivo biomechanical response. This study exposed porcine subjects to primary blast overpressures generated using a compressed-gas shock tube. Shock tube blasts were directed to the unprotected head of each animal while the lungs and thorax were protected using ballistic protective vests similar to those employed in theater. The test conditions ranged from 110-740 kPa peak incident overpressure with scaled durations from 1.3-6.9 ms and correspond approximately with a 50% injury risk for brain bleeding and apnea in a ferret model scaled to porcine exposure. The bulk head acceleration and the pressure at the surface of the head and in the cranial cavity were measured. Immediately after the blast, 5 of the 20 animals tested were apneic. Three subjects recovered without intervention within thirty seconds and the remaining two recovered within 8 minutes following bagging and administration of the respiratory stimulant doxapram. Gross examination of the brain revealed no indication of bleeding. Intracranial pressures ranged from 80-685 kPa as a result of the blast and were notably lower than the shock tube reflected pressures of 300-2830 kPa, indicating pressure attenuation by the skull up to a factor of 8.4. Peak head accelerations were measured from 385-3845 G’s and were well correlated with peak incident overpressure (R2=0.90. One standard deviation corridors for the surface pressure, intracranial pressure, and head acceleration are presented to provide experimental data for

  15. Survey of Departments of Physiology

    Science.gov (United States)

    Ganong, William F.

    1977-01-01

    Presents data of the 1976 survey of departments of physiology. Includes comparison to 1974 and 1975 data for number of academic positions available, department budgets, graduate students and post doctoral fellows, and salaries. (SL)

  16. Development of laser beam injection system for the Edge Thomson Scattering (ETS) in ITER

    Science.gov (United States)

    Yatsuka, E.; Hatae, T.; Suitoh, S.; Ohara, M.; Hagita, K.; Inoue, K.; Bassan, M.; Walsh, M.; Itami, K.

    2016-01-01

    This paper focuses on the design and development of the laser injection system for the ITER Edge Thomson Scattering system (ETS). The ITER ETS achieves a temporal resolution of 100 Hz by firing two 50 Hz laser beams alternatively. The use of dual lasers enables us to perform the Thomson scattering measurements at a temporal resolution of 50 Hz in case that one of the laser systems stops functioning. A new type of beam combiner was developed to obtain a single beam that is collinear and fixed linearly polarized from two laser beams using a motor-driven rotating half-wave plate. The rotating half-wave plate method does not induce misalignment even if the rotating mechanism malfunctions. The combined beam is relayed from the diagnostic hall to the plasma using mirror optics and is absorbed at the beam dump integrated on the inner blanket. The beam alignment system was designed to direct the laser beam onto the center of the beam dump head. The beam position at the beam dump is monitored by four alignment laser beams which propagate parallel to the diagnostic Nd:YAG laser beam and imaging systems installed outside the diagnostic port.

  17. Beam shaping to improve the free-electron laser performance at the Linac Coherent Light Source

    Science.gov (United States)

    Ding, Y.; Bane, K. L. F.; Colocho, W.; Decker, F.-J.; Emma, P.; Frisch, J.; Guetg, M. W.; Huang, Z.; Iverson, R.; Krzywinski, J.; Loos, H.; Lutman, A.; Maxwell, T. J.; Nuhn, H.-D.; Ratner, D.; Turner, J.; Welch, J.; Zhou, F.

    2016-10-01

    A new operating mode has been developed for the Linac Coherent Light Source (LCLS) in which we shape the longitudinal phase space of the electron beam. This mode of operation is realized using a horizontal collimator located in the middle of the first bunch compressor to truncate the head and tail of the beam. With this method, the electron beam longitudinal phase space and current profile are reshaped, and improvement in lasing performance can be realized. We present experimental studies at the LCLS of the beam shaping effects on the free-electron laser performance.

  18. Measurement of LINAC 90 degrees head leakage radiation TVL values.

    Science.gov (United States)

    Li, Zuofeng; Mutic, Sasa; Low, Daniel

    2006-09-01

    One of the key components in modern LINAC room shielding design is the amount of 90 degrees head leakage radiation levels. With the general clinical acceptance of intensity-modulated radiation therapy (IMRT) technique, accurate knowledge of this quantity has become even more important. Measurement of 90 degrees head leakage radiation of medical linear accelerators can be technically challenging due to the low dose rate causing poor signal-to-noise ratios in most detectors. 90 degrees leakage tenth-value layer (TVL) values in concrete have not been reported for the Elekta linear accelerators. This report describes our measurements of 90 degrees leakage TVL values for 6, 10, and 18 MV x-ray beams for an Elekta Precise Treatment System. A large-volume (1000 cm3) unpressurized ionization chamber and a high sensitivity electrometer, together with a separate chamber bias power supply, were used in these measurements in order to maximize the signal-to-noise ratio. A lead enclosure, of minimum thickness 10 cm, was constructed inside the treatment room to house the ion chamber to reduce the influence of room-scattered radiation. A square aperture of 10 X 10 cm2 area was left in the shield and aimed towards the accelerator head. Measurements were performed with the chamber placed at approximately 2 m from the accelerator isocenter. Concrete slabs with individual dimensions of approximately 40 X 40 cm2 cross-sectional area and 5 cm thickness were placed between the accelerator head and the ion chamber for these measurements. The measurements were performed with total concrete thickness of up to 80 cm, so that values up to the third TVL were measured. These measurements showed thatthe first concrete TVL values are 22, 23, and 28 cm (8.6, 9.1, and 10.5 in.) for 6, 10, and 18 MV beams, while the average of the first 3 TVL's were 25, 26, and 29 cm (9.9, 10.2, and 11.5 in.). Measured values agreed to within 10% of previously reported values for Varian linear accelerators for

  19. Preschool Facilities - MDC_HeadStart

    Data.gov (United States)

    NSGIC GIS Inventory (aka Ramona) — A label (point) feature class of Head Start / Early Head Start/ Delegate Agencies/ Child Care Partnership & Family Day Care Homes Programs location in Miami-Dade...

  20. Design of an Interaction Region with Head-On Collisions for the ILC

    Energy Technology Data Exchange (ETDEWEB)

    Appleby, R.; /Cockcroft Inst. Accel. Sci. Tech. /Manchester U.; Angal-Kalinin, D.; Jackson, F.; /Daresbury; Alabau-Pons, M .; Bambade, P.; Brossard, J.; Dadoun, O.; Rimbault, C.; /Orsay, LAL; Keller, L.; Nosochkov, Y.; Seryi, A.; /SLAC; Payet, J.; Napoly, O.; Rippon, C.; Uriot, D.; /DAPNIA, Saclay

    2006-07-12

    An interaction region (IR) with head-on collisions is considered as an alternative to the baseline configuration of the International Linear Collider (ILC) which includes two IRs with finite crossing-angles (2 and 20 mrad). Although more challenging for the beam extraction, the head-on scheme is favored by the experiments because it allows a more convenient detector configuration, particularly in the forward region. The optics of the head-on extraction is revisited by separating the e+ and e- beams horizontally, first by electrostatic separators operated at their LEP nominal field and then using a defocusing quadrupole of the final focus beam line. In this way the septum magnet is protected from the beamstrahlung power. Newly optimized final focus and extraction optics are presented, including a first look at post-collision diagnostics. The influence of parasitic collisions is shown to lead to a region of stable collision parameters. Disrupted beam and beamstrahlung photon losses are calculated along the extraction elements.

  1. Laser Beam Focus Analyser

    DEFF Research Database (Denmark)

    Nielsen, Peter Carøe; Hansen, Hans Nørgaard; Olsen, Flemming Ove

    2007-01-01

    The quantitative and qualitative description of laser beam characteristics is important for process implementation and optimisation. In particular, a need for quantitative characterisation of beam diameter was identified when using fibre lasers for micro manufacturing. Here the beam diameter limits...... the obtainable features in direct laser machining as well as heat affected zones in welding processes. This paper describes the development of a measuring unit capable of analysing beam shape and diameter of lasers to be used in manufacturing processes. The analyser is based on the principle of a rotating...... mechanical wire being swept through the laser beam at varying Z-heights. The reflected signal is analysed and the resulting beam profile determined. The development comprised the design of a flexible fixture capable of providing both rotation and Z-axis movement, control software including data capture...

  2. KEKB beam instrumentation systems

    Science.gov (United States)

    Arinaga, M.; Flanagan, J.; Hiramatsu, S.; Ieiri, T.; Ikeda, H.; Ishii, H.; Kikutani, E.; Mimashi, T.; Mitsuhashi, T.; Mizuno, H.; Mori, K.; Tejima, M.; Tobiyama, M.

    2003-02-01

    For the stable high-luminosity operation and luminosity increase, the electron and positron storage rings of the KEK B-Factory (KEKB) is equipped with various beam instrumentations, which have been working well since the start of the commissioning in December, 1998. Details and performance of the beam-position monitor system based on the spectrum analysis using DSPs, the turn-by-turn BPM with four-dimensional function available for measurements of the individual bunch position, phase and intensity, the parametric beam-DCCTs designed so as to avoid the magnetic-core-selection problems for the parametric flux modulation, the bunch-by-bunch feedback system indispensable to suppress the strong multibunch instabilities in KEKB, the various optical beam diagnostic systems, such as synchrotron radiation interferometers for precise beam-size measurement, the tune meters, the bunch length monitors and the beam-loss monitors are described. Delicate machine tuning of KEKB is strongly supported by these instrumentations.

  3. Head stabilization in whooping cranes

    Science.gov (United States)

    Kinloch, M.R.; Cronin, T.W.; Olsen, G.H.; Chavez-Ramirez, Felipe

    2005-01-01

    The whooping crane (Grus americana) is the tallest bird in North America, yet not much is known about its visual ecology. How these birds overcome their unusual height to identify, locate, track, and capture prey items is not well understood. There have been many studies on head and eye stabilization in large wading birds (herons and egrets), but the pattern of head movement and stabilization during foraging is unclear. Patterns of head movement and stabilization during walking were examined in whooping cranes at Patuxent Wildlife Research Center, Laurel, Maryland USA. Four whooping cranes (1 male and 3 females) were videotaped for this study. All birds were already acclimated to the presence of people and to food rewards. Whooping cranes were videotaped using both digital and Hi-8 Sony video cameras (Sony Corporation, 7-35 Kitashinagawa, 6-Chome, Shinagawa-ku, Tokyo, Japan), placed on a tripod and set at bird height in the cranes' home pens. The cranes were videotaped repeatedly, at different locations in the pens and while walking (or running) at different speeds. Rewards (meal worms, smelt, crickets and corn) were used to entice the cranes to walk across the camera's view plane. The resulting videotape was analyzed at the University of Maryland at Baltimore County. Briefly, we used a computerized reduced graphic model of a crane superimposed over each frame of analyzed tape segments by means of a custom written program (T. W. Cronin, using C++) with the ability to combine video and computer graphic input. The speed of the birds in analyzed segments ranged from 0.30 m/s to 2.64 m/s, and the proportion of time the head was stabilized ranged from 79% to 0%, respectively. The speed at which the proportion reached 0% was 1.83 m/s. The analyses suggest that the proportion of time the head is stable decreases as speed of the bird increases. In all cases, birds were able to reach their target prey with little difficulty. Thus when cranes are walking searching for food

  4. Random coincidences during in-beam PET measurements at microbunched therapeutic ion beams

    Science.gov (United States)

    Parodi, K.; Crespo, P.; Eickhoff, H.; Haberer, T.; Pawelke, J.; Schardt, D.; Enghardt, W.

    2005-06-01

    At the experimental carbon ion tumour therapy facility at GSI Darmstadt, in-beam positron emission tomography (PET) is used to monitor the dose delivery precision. A dual head positron camera has been assembled from commercial detector components in order to measure the β+-activity, induced by the irradiation, simultaneously to the dose application. Despite the positive clinical impact, the image quality is limited by the low counting statistics, orders of magnitude below that in standard PET applications to nuclear medicine. This paper investigates the origin for the noisy acquisition during particle extraction from the synchrotron of GSI. The results demonstrate the failure of standard random correction techniques due to a γ-ray background correlated in time with the carbon ion beam microstructure. This prevents the use of data acquired during beam extraction for imaging. The loss of counting statistics is expected to rise further at the future hospital-based facility at Heidelberg, due to a more efficient utilisation of the accelerator resulting in shorter beam pauses and a reduced treatment time. In this respect, this paper provides the basis for a new data acquisition concept tailored to the unconventional application of in-beam PET imaging to therapy monitoring at radiofrequency pulsed radiation sources.

  5. Hyperon beam physics

    Energy Technology Data Exchange (ETDEWEB)

    Cooper, P.S.

    1996-03-01

    This report reviews the present status and recent results in hyperon physics concentrating on results from high energy hyperon beam experiments performed at Fermilab over the past several years. The report focuses on hyperon production polarization, precision hyperon magnetic moment measurements and radiative decay studies. Modern charged hyperon beam experiments are characterized by {approx}100m long apparatus and hyperon beams with {gamma}{sub Y}{approx}100 and hyperon fluxes in the 1-100 kHz range.

  6. Chilled beam application guidebook

    CERN Document Server

    Butler, David; Gräslund, Jonas; Hogeling, Jaap; Lund Kristiansen, Erik; Reinikanen, Mika; Svensson, Gunnar

    2007-01-01

    Chilled beam systems are primarily used for cooling and ventilation in spaces, which appreciate good indoor environmental quality and individual space control. Active chilled beams are connected to the ventilation ductwork, high temperature cold water, and when desired, low temperature hot water system. Primary air supply induces room air to be recirculated through the heat exchanger of the chilled beam. In order to cool or heat the room either cold or warm water is cycled through the heat exchanger.

  7. Mechanically reinforced glass beams

    DEFF Research Database (Denmark)

    Nielsen, Jens Henrik; Olesen, John Forbes

    2007-01-01

    to 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...... the mechanical behavior of the beam is explained. Finally, some design criterions for reinforced glass beams are discussed....

  8. Data Report Documenting the Rattachment of the CC Cryostat Heads

    Energy Technology Data Exchange (ETDEWEB)

    Luther, R.; /Fermilab

    1990-11-06

    Reassembly of the inner pressure vessel of a seventeen foot diameter by ten foot long double wall toroidal shaped vessel in which each vessel consists of two concentric cylinders which are capped at each end by an annular dished head. Attached drawing 1, 2, 3, and 4 (all Revision 1) show the repair work items. The work covered by this data report applies only to the inner pressure vessel (See Item 8 remarks) . These work items are: (1) Two circumferential weld seams ( Seams A and G on attached drawing 2) of the north end annular dished head. (2) Two circumferential weld seams (Seam C and F on attached drawing 2) of the south end annular dished head. (3) Rerolling and rewelding of the vertical seam of the 64 3/8 inch nominal inside diameter tube (seam L on attached drawing 2) (4) Welding of the two dust catchers inside the inner pressure vessel (Seams Nand 0 on attached drawing 2). The dust catchers are attachments to pressure parts and were supplied by Fermi National Accelerator Laboratory. (5) Welding of the outer tube of the beam bypass tube (Seams I and K on attached drawing 3).

  9. Intraoperative radiation therapy (IORT) in head and neck cancer

    Science.gov (United States)

    Kyrgias, George; Hajiioannou, Jiannis; Tolia, Maria; Kouloulias, Vassilios; Lachanas, Vasileios; Skoulakis, Charalambos; Skarlatos, Ioannis; Rapidis, Alexandros; Bizakis, Ioannis

    2016-01-01

    Abstract Background: Multimodality therapy constitutes the standard treatment of advanced and recurrent head and neck cancer. Since locoregional recurrence comprises a major obstacle in attaining cure, the role of intraoperative radiation therapy (IORT) as an add-on in improving survival and local control of the disease has been investigated. IORT allows delivery of a single tumoricidal dose of radiation to areas of potential residual microscopic disease while minimizing doses to normal tissues. Advantages of IORT include the conformal delivery of a large dose of radiation in an exposed and precisely defined tumor bed, minimizing the risk of a geographic miss creating the potential for subsequent dose reduction of external beam radiation therapy (EBRT). This strategy allows for shortening overall treatment time and dose escalation. The aim of this review is to summarize recent published work on the use of IORT as an adjuvant modality to treat common head and neck cancer in the primary or recurrent setting. Methods: We searched the Medline, Scopus, Ovid, Cochrane, Embase, and ISI Web of Science databases for articles published from 1980 up to March 2016. Results: Based on relevant publications it appears that including IORT in the multimodal treatment may contribute to improved local control. However, the benefit in overall survival is not so clear. Conclusion: IORT seems to be a safe, promising adjunct in the management of head and neck cancer and yet further well organized clinical trials are required to determine its role more precisely. PMID:27977569

  10. Resolving Two Beams in Beam Splitters with a Beam Position Monitor

    Science.gov (United States)

    Kurennoy, Sergey

    2002-04-01

    The beam transport system for the Advanced Hydrotest Facility (AHF) anticipates multiple beam splitters. Monitoring two transversely separated beams in a common beam pipe in the splitter sections imposes certain requirements on beam diagnostics for these sections. We explore a two-beam system in a generic beam monitor and study the feasibility of resolving the transverse positions of the two beams with one diagnostics device. Effects of unequal beam currents and of finite transverse sizes of the beams are explored analytically for both the ultra relativistic case and the long-wavelength limit.

  11. Not a NICE CT protocol for the acutely head injured child

    Energy Technology Data Exchange (ETDEWEB)

    Willis, A.P.; Latif, S.A.A.; Chandratre, S.; Stanhope, B. [Birmingham Children' s Hospital, Steelhouse Lane, Birmingham, B4 6NH (United Kingdom); Johnson, K. [Birmingham Children' s Hospital, Steelhouse Lane, Birmingham, B4 6NH (United Kingdom)], E-mail: karl.johnson@bch.nhs.uk

    2008-02-15

    Aim: To assess the impact of the introduction of the Birmingham Children's Hospital (BCH) head injury computed tomography (CT) guidelines, when compared with the National Institute of Health and Clinical Excellence (NICE) guidelines, on the number of children with head injuries referred from the Emergency Department (ED) undergoing a CT examination of the head. Material and methods: All children attending BCH ED over a 6-month period with any severity of head injury were included in the study. ED case notes were reviewed and data were collected on a specifically designed proforma. Indications for a CT examination according to both NICE and BCH head injury guidelines and whether or not CT examinations were performed were recorded. Results: A total of 1428 children attended the BCH ED following a head injury in the 6-month period. The median age was 4 years (range 6 days to 15 years) and 65% were boys. Four percent of children were referred for a CT using BCH guidelines and were appropriately examined. If the NICE guidelines had been strictly adhered to a further 8% of children would have undergone a CT examination of the head. All of these children were discharged without complication. The remaining 88% had no indication for CT examination by either BCH or NICE and appropriately did not undergo CT. Conclusions: Adherence to the NICE head injury guidelines would have resulted in a three-fold increase in the total number of CT examinations of the head. The BCH head injury guidelines are both safe and appropriate in the setting of a large children's hospital experienced in the management of children with head injuries.

  12. [Determination of head scatter factors released from a scanning-type therapeutic accelerator].

    Science.gov (United States)

    Sato, Tomoharu

    2003-07-01

    The MM50 is a racetrack microtron capable of taking out photon beams and electron beams with energies of up to 50 MeV. It flattens the beam by the beam-scanning method, while the microtron MM22 utilizes a flattening filter. The head-scatter factors (hereafter called S(h)), which are important for evaluating the output of the photon beam of the MM50 and MM22, were measured using a mini-phantom and build-up cap. S(h) measured with the build-up cap showed the influence of contaminated electrons, whereas S(h) measured with the mini-phantom showed less influence, even for 50 MV photon beams. Compared with the MM22, the MM50 showed less change in S(h) according to field size and energy. The reason for this seemed to be that the MM50 has a smaller extra-focal region than other accelerators equipped with flattening filters and, therefore, can essentially be considered a point source by using the beam-scanning method without a flattening filter. This study demonstrated that photons scattered by the flattening filter used for beam flattening in typical medical accelerators mainly contribute to S(h).

  13. Beam cavity interaction

    CERN Document Server

    Gamp, A

    2011-01-01

    We begin by giving a description of the rf 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, rf feedback, and feed-forward are described. Examples of digital rf 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. ALFA beam halo

    CERN Document Server

    Komarek, Tomas

    2014-01-01

    This note serves as a final report about CERN Summer Student Programme 2014 project. The beam halo is an undesired phenomenon for physics analyses on particle accelerators. It surrounds the beam core and constitutes an important part of background for signal measurements on some detectors, eg. in the forward region. In this study, the data from the ALFA detector were used, specifically from the run 191373 ($\\beta^*=90\\unit{m}$) and the run 213268 ($\\beta^*=1\\unit{km}$). Using the ROOT framework, a software for beam halo events selection was created and beam halo properties were examined. In the run 213268, excessive beam halo is suspected to be the reason for multiple beam scrapings that occurred. A kinematic reconstruction of beam halo particles is attempted in order to understand beam halo properties in the interaction point. Some further simulations are employed to find constraints for beam halo particles in order to survive in the accelerator for a longer time/many revolutions. This work represents a st...

  15. Plasma Beam Measurements

    Science.gov (United States)

    1991-08-01

    GUN PLASMA BEAM / ,I 21 cm diameter = 0 GLASS DRIFT TUBE 50 cm diameter MCP CAMERA CLASS CROSSES (a) Gun muzzle /"- PLASA BEAM / TAROT z = 10 m MCP...discusses some of the hydrodynamic issues related to the calcula- tions. The reader may well wonder why hydrodynamics should be an issue in a 116 WL-TR-90...answer is yes for the slow beam cases and no for the fast beam cases. This is explained further. 118 WL-TR-90-83 The reader will recall the

  16. (Pulsed electron beam precharger)

    Energy Technology Data Exchange (ETDEWEB)

    Finney, W.C. (ed.); Shelton, W.N.

    1990-01-01

    This report discusses the following topics on electron beam guns: Precharger Modification; Installation of Charge vs. Radius Apparatus; High Concentration Aerosol Generation; and Data Acquisition and Analysis System.

  17. Simulation of Beam-Beam Background at CLIC

    CERN Document Server

    Sailer, A

    2010-01-01

    The dense beams used at CLIC to achieve a high luminosity will cause a large amount of background particles through beam-beam interactions. Generator level studies with GUINEAPIG and full detector simulation studies with an ILD based CLIC detector have been performed to evaluate the amount of beam-beam back- ground hitting the vertex detector.

  18. The AGU Board of Heads and Chairs: Past and Future

    Science.gov (United States)

    Wuebbles, D. J.; Bierly, E. W.

    2005-12-01

    The primary objective of the AGU Board of Heads and Chairs is to be a conduit for interactions of AGU with the many universities and colleges involved in geosciences education and research. The Board also provides a forum for discussing key issues being faced by Earth and space science departments. From a historical perspective, the Board of Heads and Chairs has been a venue, through various meetings over the last two decades, for bringing together Heads and Chairs of such departments solutions; discuss and critically evaluate new instruments, facilities, tools, and methodologies; come together on important issues that transcend their own science such as the need for increased computing capacity; develop ways to increase women and minorities numbers in the field and deal with their issues in an equitable manner; discuss news ways to teach, introduction of new courses, establishment of new programs and degrees to fill the community's needs; and broaden their horizons, think in truly interdisciplinary ways and, return to their institutions with increased vigor and new ideas. We are looking to expand the role of the Board for the future, particularly towards being more proactive as a clearinghouse or "point of contact" for helping the represented universities and colleges. This presentation looks at what has been done and the direction of future activities of the Board.

  19. Overview. Department of Nuclear Spectroscopy. Section 2

    Energy Technology Data Exchange (ETDEWEB)

    Styczen, J. [Institute of Nuclear Physics, Cracow (Poland)

    1995-12-31

    The 1994 year activity in the Nuclear Spectroscopy Department was like in previous years spread over large variety of subjects concerned with the in-beam nuclear spectroscopy and many nucleon transfer reactions, properties of high excited nuclear states, and the applied nuclear spectroscopy. The studies in the first two groups were mostly carried out in a vast international collaboration which enabled us to carry out experiments on highly sophisticated experimental facilities abroad like EUROGAM, GASP, HECTOR or OSIRIS, and others. Some preparations for `home` experiments have been carried out on the very much looked forward and recently obtained heavy ion beam from the cyclotron at the Warsaw University. The applied nuclear spectroscopy works, on the other hand, were based on using our own installations: an elaborated set-up for perturbed angular correlations, the RBS and PIXE set-ups at the Van de Graaff accelerator, the implanter, an atomic force microscope and several others. Much of the effort manifests itself in several valuable results which are summarized in the following pages. It is to be underlined that those results, as well as some new instrumentation developments were possible due to additional support via special grants and the promotion of the international cooperation by the State Committee for Scientific Research (KBN). (author).

  20. Supernumerary head of biceps brachii

    OpenAIRE

    Balasubramanian A

    2010-01-01

    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.

  1. 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.

  2. Change of offices for HR Department - disrupted service during the last week of February 2013

    CERN Multimedia

    2013-01-01

    HR Department would like to inform that, due to office renovation work, a number of HR Services currently located on the ground, first and second floors of Building 5 will move to temporary offices as from late February.   The removals will take place from Friday 22 until Tuesday 26 February 2013 inclusive and during this period, telephone and e-mail contact may be disrupted. The following services will be relocated to: Building 510  – ground floor (until mid-June) Head of Department and Deputy Office of the Head of HR Department Group Leaders and Partners Diversity Office HR Legal Section Building 652 – Prefab/Algeco (until September) Human Resources Advisors and assistants Staff Recruitment Service Fellows & Apprentices Service Students & Associates Service Temporary office numbers will be available in the CERN phonebook. Any emergencies during the removals may be addressed to Lynda.Leroux@cern.ch Thank you in advance for your understanding. HR Head O...

  3. Target position relative to the head is essential for predicting head movement during head-free gaze pursuit.

    Science.gov (United States)

    C Pallus, Adam; G Freedman, Edward

    2016-08-01

    Gaze pursuit is the coordinated movement of the eyes and head that allows humans and other foveate animals to track moving objects. The control of smooth pursuit eye movements when the head is restrained is relatively well understood, but how the eyes coordinate with concurrent head movements when the head is free remains unresolved. In this study, we describe behavioral tasks that dissociate head and gaze velocity during head-free pursuit in monkeys. Existing models of gaze pursuit propose that both eye and head movements are driven only by the perceived velocity of the visual target and are therefore unable to account for these data. We show that in addition to target velocity, the positions of the eyes in the orbits and the retinal position of the target are important factors for predicting head movement during pursuit. When the eyes are already near their limits, further pursuit in that direction will be accompanied by more head movement than when the eyes are centered in the orbits, even when target velocity is the same. The step-ramp paradigm, often used in pursuit tasks, produces larger or smaller head movements, depending on the direction of the position step, while gaze pursuit velocity is insensitive to this manipulation. Using these tasks, we can reliably evoke head movements with peak velocities much faster than the target's velocity. Under these circumstances, the compensatory eye movements, which are often called counterproductive since they rotate the eyes in the opposite direction, are essential to maintaining accurate gaze velocity.

  4. Preventing head and neck injury.

    Science.gov (United States)

    McIntosh, A S; McCrory, P

    2005-06-01

    A wide range of head and neck injury risks are present in sport, including catastrophic injury. The literature since 1980 on prevention of head and neck injury in sport was reviewed, focusing on catastrophic and brain injury and identifying the range of injury prevention methods in use. There have been few formal evaluations of injury prevention methods. Approaches that are considered, or have been proven, to be successful in preventing injury include: modification of the baseball; implementation of helmet standards in ice hockey and American football and increased wearing rates; use of full faceguards in ice hockey; changes in rules associated with body contact; implementation of rules to reduce the impact forces in rugby scrums. Helmets and other devices have been shown to reduce the risk of severe head and facial injury, but current designs appear to make little difference to rates of concussion. Research methods involving epidemiological, medical, and human factors are required in combination with biomechanical and technological approaches to reduce further injury risks in sport.

  5. Resolving Two Beams in Beam Splitters with a Beam Position Monitor

    CERN Document Server

    Kurennoy, S S

    2002-01-01

    The beam transport system for the Advanced Hydrotest Facility (AHF) anticipates multiple beam splitters [1]. Monitoring two separated beams in a common beam pipe in the splitter sections imposes certain requirements on diagnostics for these sections. In this note we explore a two-beam system in a generic beam monitor and study the feasibility of resolving the positions of the two beams with a single diagnostic device.

  6. First Class Call Stacks: Exploring Head Reduction

    Directory of Open Access Journals (Sweden)

    Philip Johnson-Freyd

    2016-06-01

    Full Text Available Weak-head normalization is inconsistent with functional extensionality in the call-by-name λ-calculus. We explore this problem from a new angle via the conflict between extensionality and effects. Leveraging ideas from work on the λ-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 semantics and associated abstract machines show us how to retain weak-head reduction's ease of implementation.

  7. Implementation of depolarization due to beam-beam effects in the beam-beam interaction simulation tool GUINEA-PIG++

    Science.gov (United States)

    Rimbault, C.; Le Meur, G.; Blampuy, F.; Bambade, P.; Schulte, D.

    2009-12-01

    Depolarization is a new feature in the beam-beam simulation tool GUINEA-PIG++ (GP++). The results of this simulation are studied and compared with another beam-beam simulation tool, CAIN, considering different beam parameters for the International Linear Collider (ILC) with a centre-of-mass energy of 500 GeV.

  8. Neuropsychiatric sequelae of head injuries.

    Science.gov (United States)

    McAllister, T W

    1992-06-01

    Based on the above review several general points can be highlighted: Head injuries are extremely common, affecting probably close to 2,000,000 people in this country each year. The most common are nonmissile, closed-head injuries, the majority of which occur in association with motor vehicle accidents. Virtually all studies of head injury suggest a peak incidence in the 15 to 24 years of age group. Coarse measures of outcome suggest that the very young and the elderly have poorer outcomes. Because of improved acute care, however, a large number of young, otherwise healthy patients are surviving head injuries with a variety of profound neuropsychiatric sequelae. Because of the mechanics of brain injury in acceleration-deceleration injuries, certain brain injury profiles are common including orbitofrontal, anterior and inferior temporal contusions, and diffuse axonal injury. The latter particularly affects the corpus callosum, superior cerebellar peduncle, basal ganglia, and periventricular white matter. The neuropsychiatric sequelae follow from the above injury profiles. Cognitive impairment is often diffuse with more prominent deficits in rate of information processing, attention, memory, cognitive flexibility, and problem solving. Prominent impulsivity, affective instability, and disinhibition are seen frequently, secondary to injury to frontal, temporal, and limbic areas. In association with the typical cognitive deficits, these sequelae characterize the frequently noted "personality changes" in TBI patients. In addition, these changes can exacerbate premorbid problems with impulse control. Marked difficulties with substance use, sexual expression, and aggression often result. The constellation of symptoms, which make up the postconcussive syndrome, are seen across the whole spectrum of brain injury severity. Even in so-called mild or minor head injury, these symptoms are likely to have an underlying neuropathologic, neurochemical, or neurophysiologic cause

  9. Beam distribution reconstruction simulation for electron beam probe

    CERN Document Server

    Feng, Yongchun; Li, Peng; Kang, Xincai; Yin, Yan; Liu, Tong; You, Yaoyao; Chen, Yucong; Zhao, Tiecheng; Xu, Zhiguo; Wang, Yanyu; Yuan, Youjin

    2016-01-01

    Electron beam probe (EBP) is a new principle detector, which makes use of a low-intensity and low-energy electron beam to measure the transverse profile, bunch shape, beam neutralization and beam wake field of an intense beam with small dimensions. While can be applied to many aspects, we limit our analysis to beam distribution reconstruction. This kind of detector is almost non-interceptive for all of the beam and does not disturb the machine environment. In this paper, we present the theoretical aspects behind this technique for beam distribution measurement and some simulation results of the detector involved. First, a method to obtain parallel electron beam is introduced and a simulation code is developed. And then, EBP as a profile monitor for dense beam is simulated using fast scan method under various target beam profile, such as KV distribution, waterbag distribution, parabolic distribution, Gaussian distribution and halo distribution. Profile reconstruction from the deflected electron beam trajectory...

  10. Beaming teaching application

    DEFF Research Database (Denmark)

    Markovic, Milos; Madsen, Esben; Olesen, Søren Krarup;

    2012-01-01

    BEAMING is a telepresence research project aiming at providing a multimodal interaction between two or more participants located at distant locations. One of the BEAMING applications allows a distant teacher to give a xylophone playing lecture to the students. Therefore, rendering of the xylophon...

  11. Ionization beam scanner

    CERN Multimedia

    CERN PhotoLab

    1973-01-01

    Inner structure of an ionization beam scanner, a rather intricate piece of apparatus which permits one to measure the density distribution of the proton beam passing through it. On the outside of the tank wall there is the coil for the longitudinal magnetic field, on the inside, one can see the arrangement of electrodes creating a highly homogeneous transverse electric field.

  12. Dose profile study in head CT scans using radiochromic films

    Energy Technology Data Exchange (ETDEWEB)

    Ladino G, A. M.; Prata M, A., E-mail: amlgphys@gmail.com [Universidade Federal de Minas Gerais, Departamento de Engenharia Nuclear, Av. Pte. Antonio Carlos 6627, 31270-901 Belo Horizonte, Minas Gerais (Brazil)

    2016-10-15

    Diagnostic images of computed tomography generate higher doses than other methods of diagnostic radiology using X-ray beam attenuation. Clinical applications of CT have been increased by technological advances, what leads to a wide variety of scanner in the Brazilian technological pool. It has been difficult to implement dose reduction strategies because of the lack of proper guidance on computed tomography examinations. However, CT scanners allow adjusting acquisition parameter according to the patients physical profile and diagnostic application for which the scan is intended. The knowledge of the dose distribution is important because changes in image acquisition parameters may provide dose reduction. In this study, it was used a cylindrical head phantom in PMMA with 5 openings, what allows dose measurement in 5 regions. In a GE CT scanner, Discovery model of 64 channels, the central slice of the head phantom was irradiated and the absorbed doses were measured using a pencil ionization chamber. Radiochromic film strips were placed in the peripheral and in the central region of the head phantom and was performed a scan of 10 cm in the phantom central region. The scan was performed using the head scanning protocol of the radiobiology service, with a voltage of 120 kV. After scanning, the radiochromic film strips were digitalized and their digital images were used to have the dose longitudinal profiles. The dose values recorded have variation in a range of 18.66 to 23.57 mGy. In the results it was compared the dose index values obtained by the pencil chamber measurement to the dose longitudinal profiles recorded by the film strips. (Author)

  13. A study into lowering beam trajectories in P01

    Energy Technology Data Exchange (ETDEWEB)

    Sondgeroth, A.

    1995-09-01

    This document describes what changes would be needed to lower the primary beams coming from switchyard into enclosure P01 without changing trajectories in the downstream enclosures. There is a 680 foot pipe buried in the ground between Enclosure E and P01 which allows primary beam to travel from the switchyard area to the research division area. This pipe is approximately 25 years old and has started to leak. The effects of the leaky pipe can be catastrophic to the transportation of the proton area beams. The vacuum group has devised an ingenious way of repairing a leak from the inside using remotely controlled grinders, patchers, welders and cameras mounted on carts that can be pulled into the pipe. A typical patch adds approximately one half of an inch of material which, in turn, restricts the aperture of the pipe. This pipe has three separate beams running through it split in the vertical plane. Pwest is the highest beam in the pipe and, in at least one location, the center of the beam clears the top of the pipe by one and one half inches. If a leak were to develop at a low spot in the pipe the patch to fix the leak might create an obstruction for the beam. Hence, the request from the Research Division Head.

  14. 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.

  15. Head flexion angle while using a smartphone.

    Science.gov (United States)

    Lee, Sojeong; Kang, Hwayeong; Shin, Gwanseob

    2015-01-01

    Repetitive or prolonged head flexion posture while using a smartphone is known as one of risk factors for pain symptoms in the neck. To quantitatively assess the amount and range of head flexion of smartphone users, head forward flexion angle was measured from 18 participants when they were conducing three common smartphone tasks (text messaging, web browsing, video watching) while sitting and standing in a laboratory setting. It was found that participants maintained head flexion of 33-45° (50th percentile angle) from vertical when using the smartphone. The head flexion angle was significantly larger (p neck pain of heavy smartphone users. Practitioner Summary: In this laboratory study, the severity of head flexion of smartphone users was quantitatively evaluated when conducting text messaging, web browsing and video watching while sitting and standing. Study results indicate that text messaging while sitting caused the largest head flexion than that of other task conditions.

  16. Entangled vector vortex beams

    Science.gov (United States)

    D'Ambrosio, Vincenzo; Carvacho, Gonzalo; Graffitti, Francesco; Vitelli, Chiara; Piccirillo, Bruno; Marrucci, Lorenzo; Sciarrino, Fabio

    2016-09-01

    Light beams having a vectorial field structure, or polarization, that varies over the transverse profile and a central optical singularity are called vector vortex (VV) beams and may exhibit specific properties such as focusing into "light needles" or rotation invariance. VV beams have already found applications in areas ranging from microscopy to metrology, optical trapping, nano-optics, and quantum communication. Individual photons in such beams exhibit a form of single-particle quantum entanglement between different degrees of freedom. On the other hand, the quantum states of two photons can be also entangled with each other. Here, we combine these two concepts and demonstrate the generation of quantum entanglement between two photons that are both in VV states: a form of entanglement between two complex vectorial fields. This result may lead to quantum-enhanced applications of VV beams as well as to quantum information protocols fully exploiting the vectorial features of light.

  17. Beam director design report

    Energy Technology Data Exchange (ETDEWEB)

    Younger, F.C.

    1986-08-01

    A design and fabrication effort for a beam director is documented. The conceptual design provides for the beam to pass first through a bending and focusing system (or ''achromat''), through a second achromat, through an air-to-vacuum interface (the ''beam window''), and finally through the vernier steering system. Following an initial concept study for a beam director, a prototype permanent magnet 30/sup 0/ beam-bending achromat and prototype vernier steering magnet were designed and built. In volume II, copies are included of the funding instruments, requests for quotations, purchase orders, a complete set of as-built drawings, magnetic measurement reports, the concept design report, and the final report on the design and fabrication project. (LEW)

  18. Muon Beam at the Fermilab Test Beam Area

    CERN Document Server

    Denisov, Dmitri; Lukić, Strahinja; Ujić, Predrag

    2016-01-01

    The intensities and profiles of the muon beam behind the beam dump of the Fermilab test beam area when the facility is running in the "pion" beam mode are measured and summarized in this note. This muon beam with momenta in the range 10 - 50 GeV/c provides an opportunity to perform various measurements in parallel with other users of the test beam area.

  19. TH-E-BRE-06: Challenges in the Dosimetry of Flattening Filter Free Beams

    Energy Technology Data Exchange (ETDEWEB)

    Czarnecki, D; Voigts-Rhetz, P von; Zink, K [Technische Hochschule Mittelhessen - University of Applied Sciences, Giessen, Hesse (Germany)

    2014-06-15

    Purpose: In current dosimetry protocols [AAPM TG51, IAEA TRS-389] the beam quality correction factor kQ and the water-to-air restricted mass collision stopping-power ratio SPR are related to beam quality specifiers %dd(10){sub x} respectively TPR{sub 20,10} Determining kQ and SPR using these regular beam quality specifiers for conventional accelerators (WFF) and flattening filter free accelerators (FFF) similarly could lead to systemic bias.The influence of the flattening filter on the relationship between various beam quality specifiers and SPR respectively k{sub Q} was studied using Monte Carlo simulations with realistic beam sources. Methods: All Monte Carlo simulations were performed using the BEAMnrc/EGSnrc code system. Radiation transport through nine linear accelerator heads modeled according to technical drawings given by the manufactures and a {sup 60} Co therapy source was simulated with BEAMnrc and then used as a radiation source for further simulations. FFF beam sources were implemented by removing the fattening filter from the WFF model. SPR was calculated applying the user code SPRRZnrc. The mean photon energy below the accelerator head and the mean energies of photons and electrons at the measuring point within the water phantom were calculated using FLURZnrc. Dose calculations within a small water voxel and the thimble ionization chamber PTW-31010 in a water depth of 10 cm were made using the egs-chamber code. Results: SPR and k{sub Q} as a function of fluence spectra based beam quality specifiers as well as conventional beam quality specifiers differ systematically between FFF and WFF beams. According to the results the specifier %dd(10){sub x} revealed the smallest deviation (max. 0.4%) between FFF and WFF beams. Conclusion: The results show that %dd(10){sub x} is an acceptable beam quality specifier for FFF beams. Nevertheless the results confirm the expected bias between FFF and WFF beams which must by further investigated.

  20. Mechanical Engineering Department technical abstracts

    Energy Technology Data Exchange (ETDEWEB)

    Denney, R.M. (ed.)

    1982-07-01

    The Mechanical Engineering Department publishes listings of technical abstracts twice a year to inform readers of the broad range of technical activities in the Department, and to promote an exchange of ideas. Details of the work covered by an abstract may be obtained by contacting the author(s). Overall information about current activities of each of the Department's seven divisions precedes the technical abstracts.

  1. Mechanical Engineering Department. Technical review

    Energy Technology Data Exchange (ETDEWEB)

    Simecka, W.B.; Condouris, R.A.; Talaber, C. (eds.)

    1980-01-01

    The Mechanical Engineering Department Technical Review is published to (1) inform the readers of various technical activities within the Department, (2) promote exchange of ideas, and (3) give credit to the personnel who are achieving the results. The report is formatted into two parts: technical achievements and publication abstracts. The first is divided into eight sections, one for each Division in the Department providing the reader with the names of the personnel and the Division accomplishing the work.

  2. Mechanical engineering department technical review

    Energy Technology Data Exchange (ETDEWEB)

    Carr, R.B. Denney, R.M. (eds.)

    1981-01-01

    The Mechanical Engineering Department Technical Review is published to: (1) inform the readers of various technical activities within the department, (2) promote exchange of ideas, and (3) give credit to the personnel who are achieving the results. The report is formatted into two parts: technical acievements and publication abstracts. The first is divided into eight sections, one for each division in the department providing the reader with the names of the personnel and the division accomplishing the work.

  3. Curative effect of wilsonii injecta on severe head injury

    Institute of Scientific and Technical Information of China (English)

    陈礼刚; 曾凡俊; 杨立斌; 柴建康; 李开慧; 卢敏; 匡永勤

    2002-01-01

    Objective: To study the curative effect of wilsoniiinjecta on severe head injury (SHI).Methods: A total of 120 patients with SHI weredivided randomly into 2 groups, the patients treated withconventional methods as Group A (n = 60) and the patientstreated with wilsonii injecta as Group B (n = 60). Thechanges of neural function indexes were evaluated withGlasgow Coma Scale (GCS) before treatment and withGlasgow Outcome Scale ( GOS ) after treatment,simultaneously, the paramneters of hemorrheological indexes(HI), brain electrical activity map ( BEAM ) andtranscranial Doppler sonography (TCD) were observedbefore and after treatment.Results: In Group B, the clinical GCS, the HI, theBEAM and the prognosis GOS were improved much morethan those in Group A. And the TCD parameters in GroupB decreased, which had significant difference comparedwith that in Group A (P <0.01).Conclusions: Wilsonii injecta can rapidly improve theinjured persons' conscious states, the abnormal BEAM and the surviving quality. It suggests that the improvement of the HI is related to the relief of the vasospasm of thearterial blood vessels in the brain, which may be one of theimportant mechanisms of wilsonii injecta in improving theprognosis.

  4. Laser trepanning of CFRP with a scanner head for IR and UV lasers

    Science.gov (United States)

    Anzai, Kenji; Aoyama, Mitsuaki; Fujisaki, Akira; Miyato, Taizo; Kayahara, Takashi; Harada, Yoshihisa; Niino, Hiroyuki

    2014-03-01

    The dual beam of cw-350 W single-mode near-IR fiber laser and ns-pulsed-35 W UV laser were used in the experiments for cutting. The laser beam on the sample surface was scanned with a galvanometer scanner and focused with the f-theta lens of 400 mm focal length for IR and UV laser irradiations. A prototype remote scanner head for the multiple laser irradiations has been developed for a high-quality and high-speed laser processing of carbon fiber reinforced plastics (CFRP). In this paper, we report on the laser trepanning of circular patterns on CFRP.

  5. The Values and Visions of the Professional Department Head: Not so Different from the Past?

    Science.gov (United States)

    Møthe, Svein; Ballangrud, Brit Olaug Bolken; Stensaker, Bjørn

    2015-01-01

    Purpose: The purpose of this paper is to analyze how appointed leaders in Norwegian higher education perceive their role and influence, and their discretion as academic leaders. Design/Methodology/Approach: The paper applies strategic, cultural and political perspectives on leadership to investigate the understanding and perceptions held by…

  6. Academics Transformational Leadership: An Investigation of Heads of Department Leadership Behaviours in Malaysian Public Universities

    Science.gov (United States)

    Tahir, Lokman; Abdullah, Tina; Ali, Fadzli; Daud, Khadijah

    2014-01-01

    Presently, the role and the function of universities in Malaysia have been described as being in a state of change. Several strategies have been adopted to assist in the re-branding of higher institutions of learning. As a consequence, an effective model of leadership practices, particularly at the Malaysian academic departmental level, has to be…

  7. The Feasibility of Instituting a Department Head Screen in the Naval Special Warfare Community.

    Science.gov (United States)

    1985-12-01

    regretable situatior was unavoidable. It is hoped the concerned commands understand this. Every effort was made to present an accurate picture of the...size of the zone may be greater or less than the year group size as the zone size is determined by number of personnel in the year group, lineal ...number, and billets available. The lineal number is a URL officers seniority position relative to all other URL officer-s. Also note that STRAP-0 used the

  8. Involvement of Heads of Departments in Strategic Planning in Schools in the Pinetown District

    Science.gov (United States)

    Myende, Phumlani E.; Bhengu, Thamsanqa

    2015-01-01

    Strategic planning is crucial in facilitating sustainable development of schools. It enables schools to survive and cope with changes and challenges from government policies and market forces. There is broad agreement that all stakeholders need to be part of school strategic planning. In response to the lack of evidence suggesting stakeholders'…

  9. ITW LHC GRID FEST : Interview with Wolfgang Von Rueden - Head of IT Department

    CERN Multimedia

    CERN Audiovisual Service

    2008-01-01

    Questions : What do you do? What is your role? CERN plays a key role at the heart of the data grid? How did you become interested in physics? In CERN? It seems long way from mountain climbing How can other, similar projects use the grid? How do you see the grid funded in the future? What will you do next?

  10. Quality management in a Danish Business School: A head of department perspective

    DEFF Research Database (Denmark)

    Juhl, Hans Jørn; Christensen, Michael

    2008-01-01

    The global change in the dominant idea of public higher education from a social institution to an industry has had a dramatic influence on the way that universities are organised and managed. Focus on efficiency and effectiveness has led to increasing demand for performance measures. In Denmark...

  11. Photon beam characteristics on the MM50 racetrack microtron and a new approach for beam quality determination.

    Science.gov (United States)

    Karlsson, M; Nyström, H; Svensson, H

    1993-01-01

    The photon beams of the MM50 racetrack microtron have special characteristics which make them more suitable than conventional photon beams for precision radiation therapy with good dosimetric control. The beam flattening is obtained by the scanning of an elementary beam instead of using a flattening filter. This will give a number of advantages such as the possibility to optimize field flattening to individual field forms and field sizes. The radiation quality is the same across the whole beam, which gives smaller changes in dose profiles with depth and also makes it easier to perform careful dose planning. Beam collimation is mainly performed by a multileaf collimator and the special design of the treatment head gives nearly ideal characteristics for dose determination in an arbitrary point in the treatment fields. The output factor has been shown to depend almost solely on scattering within the treatment field. The conventional methods for beam quality characterization have been found less suitable at high energies and a new method based on HVL measurements in water is proposed.

  12. LHCb celebrates completion of its beam pipe

    CERN Multimedia

    2007-01-01

    Members of the LHCb collaboration and of the AT and TS Departments are ready to pop open the champagne bottles and celebrate the complete installation and commissioning of the LHCb experiment’s beam pipe. Members of the LHCb collaboration and of the AT and TS Departments gather near the newly completed beam pipe in the foreground. All four sections of LHCb’s beam pipe have been installed, interconnected, pumped down and baked out.. Three of the conical tubes are made of beryllium in order to minimize the level of background in the experiment, while the fourth and largest section is composed of stainless steel. The first of the beryllium sections, an important connection to the Vertex Locator vacuum vessel (VELO) was installed in August 2006 (see Bulletin No. 37/2006). One of the more challenging tasks was the installation of the longest (6 m) piece of beryllium beam pipe through the 2.4 m long RICH2 detector in January 2006. Deli...

  13. Novel utilization of 3D technology and the hybrid operating theatre: Peri-operative assessment of posterior sterno-clavicular dislocation using cone beam CT

    Science.gov (United States)

    Crowhurst, James A; Campbell, Douglas; Whitby, Mark; Pathmanathan, Pavthrun

    2013-01-01

    A patient with a medial and posterior dislocation of the right sterno-clavicular (SC) joint and displacement of the trachea and brachiocephalic artery by the medial head of the clavicle underwent general anaesthetic in the operating theatre for an open reduction procedure. The surgeon initially attempted a closed reduction, but this required imaging to check SC alignment. The patient was transferred to an adjacent hybrid operating theatre for imaging. Cone beam computed tomography (CBCT) was performed, which successfully demonstrated a significant reduction in the dislocation of the SC joint. The trachea and brachiocephalic artery were no longer compressed or displaced. This case study demonstrates an alternative to the patient being transferred to the medical imaging department for multi-slice CT. It also describes a novel use of the hybrid operating theatre and its CBCT capabilities. PMID:26229610

  14. Novel utilization of 3D technology and the hybrid operating theatre: Peri-operative assessment of posterior sterno-clavicular dislocation using cone beam CT

    Energy Technology Data Exchange (ETDEWEB)

    Crowhurst, James A; Campbell, Douglas; Whitby, Mark; Pathmanathan, Pavthrun [The Prince Charles Hospital, Rode Road, Chermside, Queensland (Australia)

    2013-06-15

    A patient with a medial and posterior dislocation of the right sterno-clavicular (SC) joint and displacement of the trachea and brachiocephalic artery by the medial head of the clavicle underwent general anaesthetic in the operating theatre for an open reduction procedure. The surgeon initially attempted a closed reduction, but this required imaging to check SC alignment. The patient was transferred to an adjacent hybrid operating theatre for imaging. Cone beam computed tomography (CBCT) was performed, which successfully demonstrated a significant reduction in the dislocation of the SC joint. The trachea and brachiocephalic artery were no longer compressed or displaced. This case study demonstrates an alternative to the patient being transferred to the medical imaging department for multi-slice CT. It also describes a novel use of the hybrid operating theatre and its CBCT capabilities.

  15. Multi-Beam Optical Tweezers

    OpenAIRE

    Glückstad, Jesper; Eriksen, Rene Lynge; Hanson, Steen Grüner

    2003-01-01

    A set of multi-beam electromagnetic tweezers is provided comprising a multi-beam generator for emission of a plurality of electromagnetic beams, at least some of the electromagnetic beams intersecting each other, or, having an individually controlled polarization whereby the position and/or angular orientation of a plurality of micro-objects may be individually controlled.A set of multi-beam electromagnetic tweezers is provided comprising a multi-beam generator for emission of a plurality of ...

  16. Beam Imaging and Luminosity Calibration

    CERN Document Server

    Klute, Markus; Salfeld-Nebgen, Jakob

    2016-01-01

    We discuss a method to reconstruct two-dimensional proton bunch densities using vertex distributions accumulated during LHC beam-beam scans. The $x$-$y$ correlations in the beam shapes are studied and an alternative luminosity calibration technique is introduced. We demonstrate the method on simulated beam-beam scans and estimate the uncertainty on the luminosity calibration associated to the beam-shape reconstruction to be below 1\\%.

  17. Head position modulates optokinetic nystagmus

    Science.gov (United States)

    Ferraresi, A.; Botti, F. M.; Panichi, R.; Barmack, N. H.

    2011-01-01

    Orientation and movement relies on both visual and vestibular information mapped in separate coordinate systems. Here, we examine how coordinate systems interact to guide eye movements of rabbits. We exposed rabbits to continuous horizontal optokinetic stimulation (HOKS) at 5°/s to evoke horizontal eye movements, while they were statically or dynamically roll-tilted about the longitudinal axis. During monocular or binocular HOKS, when the rabbit was roll-tilted 30° onto the side of the eye stimulated in the posterior → anterior (P → A) direction, slow phase eye velocity (SPEV) increased by 3.5–5°/s. When the rabbit was roll-tilted 30° onto the side of the eye stimulated in the A → P direction, SPEV decreased to ~2.5°/s. We also tested the effect of roll-tilt after prolonged optokinetic stimulation had induced a negative optokinetic afternystagmus (OKAN II). In this condition, the SPEV occurred in the dark, “open loop.” Modulation of SPEV of OKAN II depended on the direction of the nystagmus and was consistent with that observed during “closed loop” HOKS. Dynamic roll-tilt influenced SPEV evoked by HOKS in a similar way. The amplitude and the phase of SPEV depended on the frequency of vestibular oscillation and on HOKS velocity. We conclude that the change in the linear acceleration of the gravity vector with respect to the head during roll-tilt modulates the gain of SPEV depending on its direction. This modulation improves gaze stability at different image retinal slip velocities caused by head roll-tilt during centric or eccentric head movement. PMID:21735244

  18. Stud Reinforcement in Beam-Column Joints under Seismic Loads

    Science.gov (United States)

    Ibrahim, Hatem Hassan Ali

    Current codes recommend large amounts of shear reinforcement for reinforced concrete beam-column joints causing significant congestion. This research aims at investigating experimentally and numerically the efficiency of using studs with a head at each end in lieu of conventional closed hoops in reinforced concrete beam-column joints. The proposed reinforcement reduces congestion and ensures easier assembly of the reinforcing cage, saving labour cost and enhancing performance of the joint. Based on this research, a recommended arrangement and detailing of headed studs and their design for exterior beam-column joint are presented. The experimental investigation consisted of testing ten full-scale beam-column joint specimens under quasi-static cyclic loading. The specimens represented an exterior beam-column joint subassembly isolated at the points of contra-flexure from a typical multi-storey, multi-bay reinforced concrete frame. A test setup was developed to simulate the lateral inter-storey drift. The test parameters included: the type, arrangement and amount of shear reinforcement, the load history and rate of loading, and the amount of reinforcement for out-of-plane confinement of the joint. Envelopes of the hysteretic behaviour of the specimens and the joint deformation under shear stress are presented. The stiffness degradation, the strain levels in the joint reinforcement, the contribution of joint, beam, and column to the inter-storey drift, and the energy dissipation were compared. All the test specimens reinforced with headed studs in the joint achieved considerable enhancement in their behaviour under cyclic loads and exhibited a performance close to that of a joint reinforced with closed hoops and cross ties according to the code. All the specimens with adequate out-of-plane confinement had an equivalent behaviour compared with the code-based specimen and achieved a desirable mode of failure. Use of double-headed studs proved to be a viable option for

  19. 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

  20. Financing Academic Departments of Psychiatry

    Science.gov (United States)

    Liptzin, Benjamin; Meyer, Roger E.

    2011-01-01

    Objective: The authors describe the many financial challenges facing academic departments of psychiatry and the resulting opportunities that may arise. Method: The authors review the history of financial challenges, the current economic situation, and what may lie ahead for academic departments of psychiatry. Results: The current environment has…

  1. Paraprofessionals in the English Department.

    Science.gov (United States)

    Getz, Howard G.

    The use of paraprofessionals (lay readers, instructional aides, clerical aides, and homekeeping aides) in secondary English departments in a three-state area (Illinois, Indiana, and Michigan) is determined and evaluated. Chapter One reviews related literature, and Chapter Two surveys paraprofessionals in the English departments. Questionnaires…

  2. Resources Available to Department Chairs.

    Science.gov (United States)

    Lynch, David M.; Bowker, Lee H.

    Resources available to department chairs from the following sources are described: the department's discipline; the national higher education community; the local institution; and the chair's own skills, background, roles, and structural placement within the organization. The use of these resources to deal with common problems faced by chairs is…

  3. Emergency Department Management of Trauma

    DEFF Research Database (Denmark)

    MacKenzie, Colin; Lippert, Freddy

    1999-01-01

    Initial assessment and management of severely injured patients may occur in a specialized area of an emergency department or in a specialized area of a trauma center. The time from injury until definitive management is of essence for survival of life-threatening trauma. The initial care delivered...... injured patients after these patients reach a hospital emergency department or a trauma center....

  4. Multi-Beam Optical Tweezers

    DEFF Research Database (Denmark)

    2003-01-01

    A set of multi-beam electromagnetic tweezers is provided comprising a multi-beam generator for emission of a plurality of electromagnetic beams, at least some of the electromagnetic beams intersecting each other, or, having an individually controlled polarization whereby the position and/or angular...... orientation of a plurality of micro-objects may be individually controlled.A set of multi-beam electromagnetic tweezers is provided comprising a multi-beam generator for emission of a plurality of electromagnetic beams, at least some of the electromagnetic beams intersecting each other, or, having...

  5. 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.

  6. Epidemiology of head injury in Malaysian children: a hospital-based study.

    Science.gov (United States)

    Rohana, J; Ong, L C; Abu Hassan, A

    1998-09-01

    A prospective observational study was carried out at the Emergency Department, Hospital Kuala Lumpur to determine the proportion of accidental head injury among children and the circumstances of injury. The study was carried out from November 1993 to January 1994 on all children below 14 years who presented to the Emergency Department with accidental head injury. Accidental head injury made up (4.75%) of all cases seen at the Casualty Department. The ratio of boys to girls was 2:1. The mean age of head injured children was 5.2 (S.D. 3.63) years. The leading cause of head injury was fall (63%) followed by road traffic accidents (RTA) in (30.7%) while the rest were due to 'impact' (injury caused by flying object or missiles) injuries. More than half (54.4%) of those injured in RTA were pedestrians. Pedestrian injury was particularly important in the 5-< 14 years age group, where adult supervision was lacking in two thirds of the children. None of the patients who were involved in vehicle-related injuries had used a suitable protective or restraining device. All three patients who died were from this group. This study emphasises the need for stricter enforcement of laws related to the use of protective devices and measures to decrease child pedestrian injury. The issues of lack of adult supervision, both in and outside the home need to be addressed.

  7. SU-E-T-353: Decoding the Beam Complexity in Intensity-Modulated Radiation Therapy Plans

    Energy Technology Data Exchange (ETDEWEB)

    Du, W; Cho, S; Zhang, X; Hoffman, K; Kudchadker, R [UT MD Anderson Cancer Center, Houston, TX (United States)

    2014-06-01

    Purpose: Modern IMRT relies on computers to generate treatment plans of varied complexity. A highly complex treatment plan may use a large number of small and irregular beam apertures in order to achieve high dose conformity. However, excessive beam complexity can increase dosimetric uncertainty, prolong treatment time, and increase susceptibility to target or organ motion. In this study we sought to develop metrics to assess the complexity of IMRT beams and plans. Methods: Based the information of leaf positions and MU for each beam segment, we calculated the following beam complexity metrics: aperture area, shape irregularity, and beam modulation. Then these beam complexity metrics were averaged to obtain the corresponding plan complexity metrics, using the beam MUs as weighting factors. We evaluated and compared the beam and plan complexity scores for 65 IMRT plans from 3 sites (prostate, head and neck, and spine). We also studied how the plan complexity scores were affected by adjusting inverse planning parameters. Results: For prostate IMRT, the lateral beams had large MUs and smaller shape irregularity, while the anterior or posterior beams had larger modulation values. On average, the prostate IMRT plans had the smallest shape irregularity and beam modulation; the HN IMRT plans had the largest aperture area, shape irregularity, and beam modulation; and the spine stereotactic IMRT plans often had small aperture area, which may be associated with relatively large discrepancies between calculated and measures doses. The plan complexity increased as the number of optimization iterations and the number of beam segments increased and as the minimum segment area decreased. Conclusion: Complexity of IMRT beams and plans were quantified in terms of aperture area, shape irregularity and beam modulation. The complexity metrics varied among IMRT plans for different disease sites and were affected when the planning parameters were adjusted.

  8. Simulations of beam-beam and beam-wire interactions in RHIC

    Energy Technology Data Exchange (ETDEWEB)

    Kim, Hyung J.; Sen, Tanaji; /Fermilab; Abreu, Natalia P.; Fischer, Wolfram; /Brookhaven

    2009-02-01

    The beam-beam interaction is one of the dominant sources of emittance growth and luminosity lifetime deterioration. A current carrying wire has been proposed to compensate long-range beam-beam effects in the LHC and strong localized long-range beam-beam effects are experimentally investigated in the RHIC collider. Tune shift, beam transfer function, and beam loss rate are measured in dedicated experiments. In this paper, they report on simulations to study the effect of beam-wire interactions based on diffusive apertures, beam loss rates, and beam transfer function using a parallelized weak-strong beam simulation code (BBSIMC). The simulation results are compared with measurements performed in RHIC during 2007 and 2008.

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

    Directory of Open Access Journals (Sweden)

    V. P. Taranenko

    1998-09-01

    Full Text Available 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 disciple, Professor Vadim Pavlovich Taranenko. Department is leading the preparation of bachelors and masters in "radio". It provides training in such subjects as radio devices, radio systems, computers, programming, and computer graphics, signal generation devices, computer-aided design in electronics, radio, Radiocomponents and fundamentals of microelectronics, electronic and quantum devices microwave, television basics, devices and systems TV and others. the Department scientific-methodical commission of the Ministry of Education of Ukraine towards the "radio", headed by the dean of the radio department prof. Pravda V.I.

  10. Head nurses' perceptions of their roles--Part I & Part II.

    Science.gov (United States)

    Baxter, E

    1993-01-01

    The head nurse is in a critical management position in a nursing department. It is the head nurse who sets the standards and directions for nursing practice on a nursing unit and manages the staff delivering the care. Due to the decentralization of managerial decisions in many nursing organizations and the change from functional to primary nursing in the care delivery systems, the head nurse role has changed considerably. The purpose of this exploratory, descriptive research study was to explore head nurses' own perception of their roles. The findings showed that head nurses are readily able to describe their work in the context of Mintzberg's ten managerial roles. Some of the roles are more familiar than others and receive more emphasis depending upon the situation. Three roles, the leader, resource allocator, and entrepreneur emerged as the most significant. Knowledge about the behaviours described by the subjects in this study may provide information to improve the educational preparation for the head nurse position. As well, increased understanding about the managerial roles should enable the head nurses to facilitate high quality patient care.

  11. A pre-Hispanic head.

    Directory of Open Access Journals (Sweden)

    Raffaella Bianucci

    Full Text Available 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.

  12. Dosimetric and Biologic Differences in Flattened and Flattening-Filter-Free Beam Treatment Plans

    CERN Document Server

    Yan, Yue; Bassetti, Michael; Du, Kaifang; Saenz, Daniel; Harari, Paul; Paliwal, Bhudatt R

    2015-01-01

    Purpose: To quantitatively compare the dosimetric and biologic differences in treatment plans from flattened and flattening-filter-free (FFF) beam for three anatomic cancer sites. Methods and Materials: Treatment plans with static intensity-modulated radiotherapy beams and volumetric modulated arc therapy beams were generated for 13 patients for both the flattened beam and the FFF beam of the TrueBeam system. Beam energies of 6 MV and 10 MV were chosen for planning. A total of 104 treatment plans were generated in 13 patients. In order to analyze the biological effectiveness of treatment plans, dose volume histograms (DVH) were utilized. Flattened and FFF beam plans are quantitatively compared. Results: In head and neck cases, for VMAT plans, dose reduction in the FFF beam plans compared to the flattened beam in left cochlea, right submandibular gland and right parotid gland reached up to 2.36 Gy, 1.21 Gy and 1.45 Gy, respectively. Similarly, for static IMRT plans, the dose reduction of the FFF beam plans com...

  13. Experimental verification of the resistance of glass beams

    Science.gov (United States)

    Slivanský, M.

    2012-03-01

    Experimental research at the Department of Steel and Timber Structures at SUT in Bratislava focused on the verification of the behavior of modern glass structures. Four types of glass beams were tested - laminated beams made of annealed (ANG) and fully tempered glass (FTG) in interactions with or without steel elements (as reinforcement). The results of the experimental research were also compared with theoretical models using FEM calculations.

  14. Exotic Optical Beam Classes for Free-Space Communication

    Science.gov (United States)

    2016-03-24

    AFRL-AFOSR-VA-TR-2016-0131 Exotic optical beam classes for free- space communication Greg Gbur UNIVERSITY OF NOTH CAROLINA AT CHARLOTTE Final Report...12-2015 4. TITLE AND SUBTITLE Exotic optical beam classes for free- space communication 5a. CONTRACT NUMBER 5b. GRANT NUMBER FA9550-13-1-0009 5c...free- space communication and sensing applications Final Performance Report Greg Gbur University of North Carolina at Charlotte Department of

  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. Electron Beam Ion Sources

    CERN Document Server

    Zschornacka, G; Thorn, A

    2013-01-01

    Electron beam ion sources (EBISs) are ion sources that work based on the principle of electron impact ionization, allowing the production of very highly charged ions. The ions produced can be extracted as a DC ion beam as well as ion pulses of different time structures. In comparison to most of the other known ion sources, EBISs feature ion beams with very good beam emittances and a low energy spread. Furthermore, EBISs are excellent sources of photons (X-rays, ultraviolet, extreme ultraviolet, visible light) from highly charged ions. This chapter gives an overview of EBIS physics, the principle of operation, and the known technical solutions. Using examples, the performance of EBISs as well as their applications in various fields of basic research, technology and medicine are discussed.

  17. Final focus test beam

    Energy Technology Data Exchange (ETDEWEB)

    1991-03-01

    This report discusses the following: the Final Focus Test Beam Project; optical design; magnets; instrumentation; magnetic measurement and BPM calibration; mechanical alignment and stabilization; vacuum system; power supplies; control system; radiation shielding and personnel protection; infrastructure; and administration.

  18. HIRENASD Beam FEM

    Data.gov (United States)

    National Aeronautics and Space Administration — This contains attempts to create BEAM FEM model. I have started a Blog to discuss this... please put your comments there and I will attempt to keep everything...

  19. Pulsed electron beam precharger

    Energy Technology Data Exchange (ETDEWEB)

    Finney, W.C. (ed.); Shelton, W.N.

    1991-01-01

    Electron beam precharging of a high resistivity aerosol was successfully demonstrated during this reporting period (Quarters Five and Six). The initial E-beam particle precharging experiments completed this term were designed to confirm and extend some of the work performed under the previous contract. There are several reasons for doing this: (1) to re-establish a baseline performance criterion for comparison to other runs, (2) to test several recently upgraded or repaired subsystems, and (3) to improve upon the collection efficiency of the electron beam precipitator when testing precharging effectiveness with a very high resistivity, moderate-to-high concentration dust load. In addition, these shakedown runs were used to determine a set of suitable operational parameters for the wind tunnel, the electrostatic collecting sections, and the MINACC E-beam accelerator. These parameters will generally be held constant while the precharging parameters are varied to produce an optimum particle charge.

  20. Measurement and simulation of the TRR BNCT beam parameters

    Science.gov (United States)

    Bavarnegin, Elham; Sadremomtaz, Alireza; Khalafi, Hossein; Kasesaz, Yaser; Golshanian, Mohadeseh; Ghods, Hossein; Ezzati, Arsalan; Keyvani, Mehdi; Haddadi, Mohammad

    2016-09-01

    Recently, the configuration of the Tehran Research Reactor (TRR) thermal column has been modified and a proper thermal neutron beam for preclinical Boron Neutron Capture Therapy (BNCT) has been obtained. In this study, simulations and experimental measurements have been carried out to identify the BNCT beam parameters including the beam uniformity, the distribution of the thermal neutron dose, boron dose, gamma dose in a phantom and also the Therapeutic Gain (TG). To do this, the entire TRR structure including the reactor core, pool, the thermal column and beam tubes have been modeled using MCNPX Monte Carlo code. To measure in-phantom dose distribution a special head phantom has been constructed and foil activation techniques and TLD700 dosimeter have been used. The results show that there is enough uniformity in TRR thermal BNCT beam. TG parameter has the maximum value of 5.7 at the depth of 1 cm from the surface of the phantom, confirming that TRR thermal neutron beam has potential for being used in treatment of superficial brain tumors. For the purpose of a clinical trial, more modifications need to be done at the reactor, as, for example design, and construction of a treatment room at the beam exit which is our plan for future. To date, this beam is usable for biological studies and animal trials. There is a relatively good agreement between simulation and measurement especially within a diameter of 10 cm which is the dimension of usual BNCT beam ports. This relatively good agreement enables a more precise prediction of the irradiation conditions needed for future experiments.

  1. Measurement and simulation of the TRR BNCT beam parameters

    Energy Technology Data Exchange (ETDEWEB)

    Bavarnegin, Elham [Nuclear Science and Technology Research Institute (NSTRI), Tehran (Iran, Islamic Republic of); Department of Physics, University of Guilan, Rasht (Iran, Islamic Republic of); Sadremomtaz, Alireza [Department of Physics, University of Guilan, Rasht (Iran, Islamic Republic of); Khalafi, Hossein [Nuclear Science and Technology Research Institute (NSTRI), Tehran (Iran, Islamic Republic of); Kasesaz, Yaser, E-mail: ykasesaz@aeoi.org.ir [Nuclear Science and Technology Research Institute (NSTRI), Tehran (Iran, Islamic Republic of); Golshanian, Mohadeseh; Ghods, Hossein; Ezzati, Arsalan; Keyvani, Mehdi; Haddadi, Mohammad [Nuclear Science and Technology Research Institute (NSTRI), Tehran (Iran, Islamic Republic of)

    2016-09-11

    Recently, the configuration of the Tehran Research Reactor (TRR) thermal column has been modified and a proper thermal neutron beam for preclinical Boron Neutron Capture Therapy (BNCT) has been obtained. In this study, simulations and experimental measurements have been carried out to identify the BNCT beam parameters including the beam uniformity, the distribution of the thermal neutron dose, boron dose, gamma dose in a phantom and also the Therapeutic Gain (TG). To do this, the entire TRR structure including the reactor core, pool, the thermal column and beam tubes have been modeled using MCNPX Monte Carlo code. To measure in-phantom dose distribution a special head phantom has been constructed and foil activation techniques and TLD700 dosimeter have been used. The results show that there is enough uniformity in TRR thermal BNCT beam. TG parameter has the maximum value of 5.7 at the depth of 1 cm from the surface of the phantom, confirming that TRR thermal neutron beam has potential for being used in treatment of superficial brain tumors. For the purpose of a clinical trial, more modifications need to be done at the reactor, as, for example design, and construction of a treatment room at the beam exit which is our plan for future. To date, this beam is usable for biological studies and animal trials. There is a relatively good agreement between simulation and measurement especially within a diameter of 10 cm which is the dimension of usual BNCT beam ports. This relatively good agreement enables a more precise prediction of the irradiation conditions needed for future experiments.

  2. SPIDER beam dump as diagnostic of the particle beam

    Science.gov (United States)

    Zaupa, M.; Dalla Palma, M.; Sartori, E.; Brombin, M.; Pasqualotto, R.

    2016-11-01

    The beam power produced by the negative ion source for the production of ion of deuterium extracted from RF plasma is mainly absorbed by the beam dump component which has been designed also for measuring the temperatures on the dumping panels for beam diagnostics. A finite element code has been developed to characterize, by thermo-hydraulic analysis, the sensitivity of the beam dump to the different beam parameters. The results prove the capability of diagnosing the beam divergence and the horizontal misalignment, while the entity of the halo fraction appears hardly detectable without considering the other foreseen diagnostics like tomography and beam emission spectroscopy.

  3. Measurement Error Effects of Beam Parameters Determined by Beam Profiles

    CERN Document Server

    Jang, Ji-Ho; Jeon, Dong-O

    2015-01-01

    A conventional method to determine beam parameters is using the profile measurements and converting them into the values of twiss parameters and beam emittance at a specified position. The beam information can be used to improve transverse beam matching between two different beam lines or accelerating structures. This work is related with the measurement error effects of the beam parameters and the optimal number of profile monitors in a section between MEBT (medium energy beam transport) and QWR (quarter wave resonator) of RAON linear accelerator.

  4. Transverse Beam Size Effects in Beam Position Monitors

    Science.gov (United States)

    Kurennoy, Sergey

    2001-04-01

    The fields produced by a long beam with a given transverse charge distribution in a homogeneous vacuum chamber are studied. Signals induced by the displaced finite-size beam on electrodes of a beam position monitor (BPM) are calculated and compared to those from a pencil beam. The corrections to BPM signals due to a finite beam size are found analytically for a few particular transverse distributions of the beam current. The results for fields can also be directly applied for calculating the beam coupling impedances of small discontinuities.

  5. LHCb: Beam Pipe portrait

    CERN Multimedia

    LHCb, Collaboration

    2005-01-01

    The proton beams circulate in the accelerator in Ultra High Vacuum to make them interact only with each other when colliding at the interaction point. A special beam pipe "holds" the vacuum where they pass through the LHCb detector: it has to be mechanically very strong to stand the difference in pressure between the vacuum inside it and the air in the cavern but also be as transparent as possible for the particles originating in the proton−proton collisions.

  6. LHCb: Beam Pipe

    CERN Multimedia

    LHCb, Collaboration

    2005-01-01

    The proton beams circulate in the accelerator in Ultra High Vacuum to make them interact only with each other when colliding at the interaction point. A special beam pipe "holds" the vacuum where they pass through the LHCb detector:it has to be mechanically very strong to stand the difference in pressure between the vacuum inside it and the air in the cavern but also be as transparent as possible for the particles originating in the proton−proton collisions.

  7. Wire Scanner Beam Profile Measurements: LANSCE Facility Beam Development

    Energy Technology Data Exchange (ETDEWEB)

    Gilpatrick, John D. [Los Alamos National Laboratory; Batygin, Yuri K. [Los Alamos National Laboratory; Gonzales, Fermin [Los Alamos National Laboratory; Gruchalla, Michael E. [Los Alamos National Laboratory; Kutac, Vincent G. [Los Alamos National Laboratory; Martinez, Derwin [Los Alamos National Laboratory; Sedillo, James Daniel [Los Alamos National Laboratory; Pillai, Chandra [Los Alamos National Laboratory; Rodriguez Esparza, Sergio [Los Alamos National Laboratory; Smith, Brian G. [Los Alamos National Laboratory

    2012-05-15

    The Los Alamos Neutron Science Center (LANSCE) is replacing Wire Scanner (WS) beam profile measurement systems. Three beam development tests have taken place to test the new wire scanners under beam conditions. These beam development tests have integrated the WS actuator, cable plant, electronics processors and associated software and have used H{sup -} beams of different beam energy and current conditions. In addition, the WS measurement-system beam tests verified actuator control systems for minimum profile bin repeatability and speed, checked for actuator backlash and positional stability, tested the replacement of simple broadband potentiometers with narrow band resolvers, and tested resolver use with National Instruments Compact Reconfigurable Input and Output (cRIO) Virtual Instrumentation. These beam tests also have verified how trans-impedance amplifiers react with various types of beam line background noise and how noise currents were not generated. This paper will describe these beam development tests and show some resulting data.

  8. Eye-head coordination in cats.

    Science.gov (United States)

    Guitton, D; Douglas, R M; Volle, M

    1984-12-01

    Gaze is the position of the visual axis in space and is the sum of the eye movement relative to the head plus head movement relative to space. In monkeys, a gaze shift is programmed with a single saccade that will, by itself, take the eye to a target, irrespective of whether the head moves. If the head turns simultaneously, the saccade is correctly reduced in size (to prevent gaze overshoot) by the vestibuloocular reflex (VOR). Cats have an oculomotor range (OMR) of only about +/- 25 degrees, but their field of view extends to about +/- 70 degrees. The use of the monkey's motor strategy to acquire targets lying beyond +/- 25 degrees requires the programming of saccades that cannot be physically made. We have studied, in cats, rapid horizontal gaze shifts to visual targets within and beyond the OMR. Heads were either totally unrestrained or attached to an apparatus that permitted short unexpected perturbations of the head trajectory. Qualitatively, similar rapid gaze shifts of all sizes up to at least 70 degrees could be accomplished with the classic single-eye saccade and a saccade-like head movement. For gaze shifts greater than 30 degrees, this classic pattern frequently was not observed, and gaze shifts were accomplished with a series of rapid eye movements whose time separation decreased, frequently until they blended into each other, as head velocity increased. Between discrete rapid eye movements, gaze continued in constant velocity ramps, controlled by signals added to the VOR-induced compensatory phase that followed a saccade. When the head was braked just prior to its onset in a 10 degrees gaze shift, the eye attained the target. This motor strategy is the same as that reported for monkeys. However, for larger target eccentricities (e.g., 50 degrees), the gaze shift was interrupted by the brake and the average saccade amplitude was 12-15 degrees, well short of the target and the OMR. Gaze shifts were completed by vestibularly driven eye movements when the

  9. 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.

  10. Moving your head reduces perisaccadic compression.

    Science.gov (United States)

    Matziridi, Maria; Brenner, Eli; Smeets, Jeroen B J

    2016-10-01

    Flashes presented around the time of a saccade appear to be closer to the saccade endpoint than they really are. The resulting compression of perceived positions has been found to increase with the amplitude of the saccade. In most studies on perisaccadic compression the head is static, so the eye-in-head movement is equal to the change in gaze. What if moving the head causes part of the change in gaze? Does decreasing the eye-in-head rotation by moving the head decrease the compression of perceived positions? To find out, we asked participants to shift their gaze between two positions, either without moving their head or with the head contributing to the change in gaze. Around the time of the saccades we flashed bars that participants had to localize. When the head contributed to the change in gaze, the duration of the saccade was shorter and compression was reduced. We interpret this reduction in compression as being caused by a reduction in uncertainty about gaze position at the time of the flash. We conclude that moving one's head can reduce the systematic mislocalization of flashes presented around the time of saccades.

  11. High power beam analysis

    Science.gov (United States)

    Aharon, Oren

    2014-02-01

    In various modern scientific and industrial laser applications, beam-shaping optics manipulates the laser spot size and its intensity distribution. However the designed laser spot frequently deviates from the design goal due to real life imperfections and effects, such as: input laser distortions, optical distortion, heating, overall instabilities, and non-linear effects. Lasers provide the ability to accurately deliver large amounts of energy to a target area with very high accuracy. Thus monitoring beam size power and beam location is of high importance for high quality results and repeatability. Depending on the combination of wavelength, beam size and pulse duration , laser energy is absorbed by the material surface, yielding into processes such as cutting, welding, surface treatment, brazing and many other applications. This article will cover the aspect of laser beam measurements, especially at the focal point where it matters the most. A brief introduction to the material processing interactions will be covered, followed by fundamentals of laser beam propagation, novel measurement techniques, actual measurement and brief conclusions.

  12. 33 CFR 80.115 - Portland Head, ME to Cape Ann, MA.

    Science.gov (United States)

    2010-07-01

    ... 33 Navigation and Navigable Waters 1 2010-07-01 2010-07-01 false Portland Head, ME to Cape Ann, MA. 80.115 Section 80.115 Navigation and Navigable Waters COAST GUARD, DEPARTMENT OF HOMELAND SECURITY..., MA. (a) Except inside lines specifically described in this section, the 72 COLREGS shall apply on...

  13. Colliding beam physics at Fermilab: detector considerations, general topics

    Energy Technology Data Exchange (ETDEWEB)

    Walker, J.K. (ed.)

    1977-01-01

    The purpose of the Colliding Beams Experiment 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 two is on detector considerations and general topics. 22 papers from this part are included in the data base. (GHT)

  14. Dosimetry for Total Skin Electron Beam Therapy in Skin Cancer

    Energy Technology Data Exchange (ETDEWEB)

    Chu, Sung Sil; Loh, John J. K.; Kim, Gwi Eon [Yonsei University College of Medicine, Seoul (Korea, Republic of)

    1992-06-15

    Increasing frequency of skin cancer, mycosis fungoides, Kaposi sarcoma etc, it need to treatment dose planning for total skin electron beam (TSEB) therapy. Appropriate treatment planning for TSEB therapy is needed to give homogeneous dose distribution throughout the entire skin surface. The energy of 6 MeV electron from the 18 MeV medical linear accelerator was adapted for superficial total skin electron beam therapy. The energy of the electron beam was reduced to 4.2 MeV by a 0.5cmx90cmx180cm acryl screen placed in a feet front of the patient. Six dual field beam was adapted for total skin irradiation to encompass the entire body surface from head to toe simultaneously. The patients were treated behind the acryl screen plate acted as a beam scatterer and contained a parallel-plate shallow ion chamber for dosimetry and beam monitoring. During treatment, the patient was placed in six different positions due to be homogeneous dose distribution for whole skin around the body. One treatment session delivered 400 cGy to the entire skin surface and patients were treated twice a week for eight consecutive weeks, which is equivalent to TDF value 57. Instrumentation and techniques developed in determining the depth dose, dose distribution and bremsstrahlung dose are discussed.

  15. Ribbon Ion Beam with Controlled Directionality and Local Reactive Chemistry

    Science.gov (United States)

    Biloiu, Costel; Gilchrist, Glen; Kontos, Alex; Basame, Solomon; Rockwell, Tyler; Campbell, Chris; Daniels, Kevin; Allen, Ernest; Wallace, Jay; Ballou, Jon; Hertel, Richard; Chen, Tsung-Liang; Liang, Shurong; Singh, Vikram

    2016-09-01

    A plasma processing technology designed for etch of 3D semiconductor structures is presented. The technology is characterized by controllable ion directionality and local reactive chemistry and it is based on proprietary Applied Materials - Varian Semiconductor Equipment ribbon ion beam architecture. It uses a combination of inert gas ion beam and injection of reactive chemical species at the Point-of-Use (PoU), i.e., at the wafer surface. The ion source uses an inductively coupled plasma source and a diode-type extraction optics. A beam shaping electrode allows extraction of two symmetrical ribbon-like beamlets. The ion beam has in situ controllable ion angular distribution in both mean angle and angular spread. The beam has a uniform distribution of beam current and angles over a waist exceeding 300 mm, allowing full wafer processing in one pass. Chemical compounds are delivered at PoU through linear shower heads. The reactive chemical compound delivered in this fashion maintains its molecular integrity. This result in protection of the trench side walls from deposition of etch residue and facilitates formation of volatile byproducts. The technology was used successfully for mitigation of Magnetic Tunel Junction etch residue. Other applications were this technology differentiate from present technologies are contact liner etch, Co recess, and 1D hole elongation.

  16. ILC beam energy measurement by means of laser Compton backscattering

    Energy Technology Data Exchange (ETDEWEB)

    Muchnoi, N. [Budker Inst. for Nuclear Physics, Novosibirsk (Russian Federation); Schreiber, H.J.; Viti, M. [Deutsches Elektronen-Synchrotron (DESY), Zeuthen (Germany)

    2008-10-15

    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{sup -4} or better on a bunch-to-bunch basis while the electron and positron beams are in collision. (orig.)

  17. Mechanical Engineering Department technical abstracts

    Energy Technology Data Exchange (ETDEWEB)

    1984-07-01

    The Mechanical Engineering Department publishes abstracts twice a year to inform readers of the broad range of technical activities in the Department, and to promote an exchange of ideas. Details of the work covered by an abstract may be obtained by contacting the author(s). General information about the current role and activities of each of the Department's seven divisions precedes the technical abstracts. Further information about a division's work may be obtained from the division leader, whose name is given at the end of each divisional summary. The Department's seven divisions are as follows: Nuclear Test Engineering Division, Nuclear Explosives Engineering Division, Weapons Engineering Division, Energy Systems Engineering Division, Engineering Sciences Division, Magnetic Fusion Engineering Division and Materials Fabrication Division.

  18. Teale Department of Water Resources

    Data.gov (United States)

    California Department of Resources — California Spatial Information System (CaSIL) is a project designed to improve access to geo-spatial and geo-spatial related data information throughout the state...

  19. Carotid artery blowout producing massive hematemesis in the emergency department

    Institute of Scientific and Technical Information of China (English)

    Harrison K Borno; Richard J Menendez; John C Chaloupka; Michael T Dalley; David A Farcy

    2016-01-01

    Carotid blowout syndrome (CBS) is a rare and fatal complication which arises from patients who have been treated for head and neck cancer. The incidence of CBS is rare and not commonly seen by emergency physicians. We review a case of a 68-year-old woman with a history of laryngectomy and chemo-radiation therapy presenting with massive oral bleeding and hypotension. Her course and treatments are highlighted, literature referring to CBS are described and we reintroduce the approach of managing such a patient in the emergency department.

  20. Carotid artery blowout producing massive hematemesis in the emergency department

    Directory of Open Access Journals (Sweden)

    Harrison K. Borno

    2016-03-01

    Full Text Available Carotid blowout syndrome (CBS is a rare and fatal complication which arises from patients who have been treated for head and neck cancer. The incidence of CBS is rare and not commonly seen by emergency physicians. We review a case of a 68-year-old woman with a history of laryngectomy and chemo-radiation therapy presenting with massive oral bleeding and hypotension. Her course and treatments are highlighted, literature referring to CBS are described and we reintroduce the approach of managing such a patient in the emergency department.