WorldWideScience

Sample records for proficient lep students

  1. Developing English Writing Proficiency in Limited English Proficient College Students through Cooperative Learning Strategies.

    Science.gov (United States)

    Gooden-Jones, Epsey M.; Carrasquillo, Angela L.

    A study followed ten limited-English-proficient (LEP) community college students who were taught English largely using a cooperative learning approach. For four months, the students worked together using brainstorming techniques and collaborative reading and writing tasks. Task emphasis was on development of thinking skills through collaboration…

  2. Indiana Teachers' Perspectives on Testing Accommodations for Limited English Proficient Students Taking the Graduation Qualifying Exam

    Science.gov (United States)

    Hetler, Angela Dawn

    2010-01-01

    This qualitative case study examines teachers' perspectives on testing accommodations for Limited English Proficient (LEP) students taking Indiana's Graduation Qualifying Exam (GQE). The Indiana Department of Education (IDOE) states that the purpose of testing accommodations is to "level the playing field" between LEP students and their…

  3. Emergency Immigration Education Act Programs: Summer E.S.L. Welcome Plus Program for Students of Limited English Proficiency (LEP), Summer Bilingual Program, and Project Omega. OREA Report.

    Science.gov (United States)

    Duque, Diana L.

    This report presents findings of the evaluation by the New York City public school system's Office of Research, Evaluation, and Assessment of three programs (Summer E.S.L. Welcome Plus, Summer Bilingual, and Project Omega) for immigrant students. The Summer E.S.L. (English as a Second Language) Welcome Plus program operated at 19 sites in New York…

  4. Integrating Students of Limited English Proficiency into Standards-Based Reform in the Abbott Districts. Abbott Implementation Resource Guide

    Science.gov (United States)

    Lucas, Tamara; Villegas, Ana Maria

    2004-01-01

    In 1999-2000, over one-third of all students in the 30 Abbott districts spoke a native language other than English, and more than one-tenth were considered limited English proficient (LEP). The proportions of LEP students varied considerably across the districts, but they comprised between 5% and 29% of total enrollments in 18 of the districts.…

  5. Impact of Bilingual Education Programs on Limited English Proficient Students and Their Peers

    DEFF Research Database (Denmark)

    Daysal, N. Meltem; Chin, Aimee; Imberman, Scott

    2013-01-01

    bilingual education above this 20-student cutoff. Using this discontinuity as an instrument for district bilingual education provision, we find that providing bilingual education programs (relative to providing only English as a Second Language programs) does not significantly impact the standardized test...... scores of students with Spanish as their home language (comprised primarily of ever-LEP students). However, we find significant positive impacts on non-LEP students’ achievement, which indicates that education programs for LEP students have spillover effects to non-LEP students.......Texas requires a school district to offer bilingual education when its enrollment of limited English proficient (LEP) students in a particular elementary grade and language is twenty or higher. Using school panel data, we find a significant increase in the probability that a district provides...

  6. Learning Strategies in Alleviating English Writing Anxiety for English Language Learners (ELLs) with Limited English Proficiency (LEP)

    Science.gov (United States)

    Wu, Chia-Pei; Lin, Huey-Ju

    2016-01-01

    This study utilized the Oxford Strategy Inventory for Language Learning (SILL) and an English writing anxiety scale to examine the relationship between learning strategies and English writing anxiety in 102 university-level English language learners (ELLs) with Limited English Proficiency (LEP) in a university in Taiwan. Kruskal Wallis Test…

  7. Geodes Like Sky Blue Popsicles: Developing Authorship Literacy in Limited English Proficient Students.

    Science.gov (United States)

    Boehlke, Lisa; Rummel, Mary Kay

    1990-01-01

    An approach is described for developing the language of limited English proficient (LEP) students using process writing with content drawn from across the curriculum. This is proposed in the context of recent research in second language reading that has focused on developing metacognitive awareness and use of reading strategies, and that less…

  8. A Digital Language Divide? The Relationship between Internet Medication Refills and Medication Adherence among Limited English Proficient (LEP) Patients.

    Science.gov (United States)

    Casillas, Alejandra; Moreno, Gerardo; Grotts, Jonathan; Tseng, Chi-Hong; Morales, Leo S

    2018-03-29

    Use of an Internet portal to refill medicines positively affects medication adherence among English-speakers. No prior studies, however, have specifically examined the relationship between Internet refills and medication adherence among patients who are limited English proficient (LEP). (1) Examine the relationship between Internet medication refill system use and medication adherence among linguistically diverse patients with chronic conditions and (2) compare this relationship between LEP and English-proficient (EP) patients. We analyzed 2013-2014 cross-sectional data from 509 surveyed adults in the Group Health Cooperative. Surveys were merged with plan enrollment, claims data, and electronic medical records. Medication adherence was calculated by the "Continuous Measure of Medication Gaps" (CMG) method. For Internet refill system use, patients were asked, "Have you used the health systems Internet site to refill any medications in the last 12 months?" LEP status was captured in the electronic medical record by a non-English primary language and a claims record of interpreter use in at least one clinical encounter between 2005 and 2012. We used multivariate linear regression models to examine Internet refill system use and medication adherence and compared the association between LEP and EP patients. Three hundred eighty-four patients (75%) had a calculable CMG: 134 EP and 250 LEP in the adherence analyses. In unadjusted analyses, LEP patients had lower use of the Internet refill system (p < .001) and lower adherence versus the EP group (p < .001). In multivariate analyses, LEP status (β = - 0.022, p = .047) was negatively associated with adherence, while use of the Internet refill system (β = 0.030, p = .002) was positively associated. In stratified models, use of Internet refills was positively associated with adherence, even when examining LEP (β = 0.029, p = .003) and EP patients (β = 0.027, p = .049) separately

  9. Secondary Engineering Design Graphics Educator Service Load of Students with Identified Categorical Disabilities and Limited English Proficiency

    Science.gov (United States)

    Ernst, Jeremy V.; Li, Songze; Williams, Thomas O.

    2014-01-01

    The ever-changing student population of engineering design graphics students necessitates broader sets of instructor adeptness. Specifically, preparedness to educate and provide adequate educational access to content for students with identified categorical disabilities and Limited English Proficiency (LEP) is now an essential readiness skill for…

  10. Survey of US Veterinary Students on Communicating with Limited English Proficient Spanish-Speaking Pet Owners.

    Science.gov (United States)

    Landau, Ruth E; Beck, Alan; Glickman, Larry T; Litster, Annette; Widmar, Nicole J Olynk; Moore, George E

    2015-01-01

    Veterinary schools and colleges generally include communication skills training in their professional curriculum, but few programs address challenges resulting from language gaps between pet owners and practitioners. Due to shifting US demographics, small animal veterinary practices must accommodate an increasing number of limited English proficient (LEP) Spanish-speaking pet owners (SSPOs). A national survey was conducted to assess the interest and preparedness of US veterinary students to communicate with LEP SSPOs when they graduate. This online survey, with more than 2,000 first-, second-, and third-year US veterinary students, revealed that over 50% of students had worked at a practice or shelter that had LEP Spanish-speaking clients. Yet fewer than 20% of these students described themselves as prepared to give medical information to an LEP SSPO. Over three-fourths of respondents agreed that communication with LEP SSPOs was important for veterinarians in general, and two-thirds agreed that communication with LEP SSPOs was important for themselves personally. Ninety percent of students who described themselves as conversant in Spanish agreed that they would be able to communicate socially with SSPOs, while only 55% said they would be able to communicate medically with such clients. Overall, two-thirds of students expressed interest in taking Spanish for Veterinary Professionals elective course while in school, with the strongest interest expressed by those with advanced proficiency in spoken Spanish. Bridging language gaps has the potential to improve communication with LEP SSPOs in the veterinary clinical setting and to improve patient care, client satisfaction, and the economic health of the veterinary profession.

  11. Impact of Bilingual Education Programs on Limited English Proficient Students and Their Peers : Regression Discontinuity Evidence from Texas

    NARCIS (Netherlands)

    Chin, A.; Meltem Daysal, N.; Imberman, S.A.

    2012-01-01

    Abstract: Texas requires a school district to offer bilingual education when its enrollment of limited English proficient (LEP) students in a particular elementary grade and language is twenty or higher. Using school panel data, we find a significant increase in the probability that a district

  12. A Validation Study of the Student Oral Proficiency Assessment (SOPA).

    Science.gov (United States)

    Thompson, Lynn E.; Kenyon, Dorry M.; Rhodes, Nancy C.

    This study validated the Student Oral Proficiency Assessment (SOPA), an oral proficiency instrument designed for students in elementary foreign language programs. Elementary students who were tested with the SOPA were also administered other instruments designed to measure proficiency. These instruments included the Stanford Foreign Language Oral…

  13. Lessons on Ancient China for LEP Adolescents.

    Science.gov (United States)

    Wigglesworth, Pierre Giles

    A unit in a Glendale, California sixth grade social studies curriculum is presented as a model for addressing two problems in the instruction of the growing population of limited English-proficient (LEP) students: (1) inadequate teacher training; and (2) shortage of appropriate, effective instructional materials. For the curriculum segment on…

  14. Language proficiency and the international postgraduate student experience

    OpenAIRE

    Weaver, M

    2016-01-01

    In an increasingly competitive environment, with reduced government funding, full fee-paying international students are an important source of revenue for higher education institutions (HEIs). Although many previous studies have focused on the role of English language proficiency on academic success, there is little known about the extent to which levels of English language proficiency affect these non-native English speaking students’ overall course experience. There have been a wealth of st...

  15. Teaching Mathematical Problem Solving to Students with Limited English Proficiency.

    Science.gov (United States)

    Kaplan, Rochelle G.; Patino, Rodrigo A.

    Many mainstreamed students with limited English proficiency continue to face the difficulty of learning English as a second language (ESL) while studying mathematics and other content areas framed in the language of native speakers. The difficulty these students often encounter in mathematics classes and their poor performance on subsequent…

  16. Beyond Host Language Proficiency: Coping Resources Predicting International Students' Satisfaction

    Science.gov (United States)

    Mak, Anita S.; Bodycott, Peter; Ramburuth, Prem

    2015-01-01

    As international students navigate in a foreign educational environment, having higher levels of coping or stress-resistance resources--both internal and external--could be related to increased satisfaction with personal and university life. The internal coping resources examined in this study were host language proficiency, self-esteem,…

  17. Listening and Reading Proficiency Levels of College Students

    Science.gov (United States)

    Tschirner, Erwin

    2016-01-01

    This article examines listening and reading proficiency levels of U.S. college foreign language students at major milestones throughout their undergraduate career. Data were collected from more than 3,000 participants studying seven languages at 21 universities and colleges across the United States. The results show that while listening…

  18. Impact of English Proficiency on Academic Performance of International Students

    Science.gov (United States)

    Martirosyan, Nara M.; Hwang, Eunjin; Wanjohi, Reubenson

    2015-01-01

    Using an ex-post facto, non-experimental approach, this research examined the impact of English language proficiency and multilingualism on the academic performance of international students enrolled in a four-year university located in north central Louisiana in the United States. Data were collected through a self-reported questionnaire from 59…

  19. The Effect of a Simplified English Language Dictionary on a Reading Test. LEP Projects Report 1.

    Science.gov (United States)

    Albus, Deb; Bielinski, John; Thurlow, Martha; Liu, Kristin

    This study was conducted to examine whether using a monolingual, simplified English dictionary as an accommodation on a reading test with limited-English-proficient (LEP) Hmong students improved test performance. Hmong students were chosen because they are often not literate in their first language. For these students, bilingual dictionaries are…

  20. Performance of ESL Students on a State Minimal Competency Test.

    Science.gov (United States)

    Brown, James Dean

    1991-01-01

    Differences between scores of Limited-English-Proficient (LEP) and non-LEP ninth grade students on the Hawaii State Test of Essential Competencies were studied. The LEP population scored significantly lower than the control group; results are discussed in terms of language training needs. (15 references) (Author/LB)

  1. Non-Discriminatory Assessment: Formal and Informal Assessment of Limited English Proficient Children.

    Science.gov (United States)

    Mares, Sharon

    PEOPLE (Pruebas de Expresion Oral y Percepcion de la Lengua Espanol) was developed as a test to help distinguish between a language difference and a language deficit in non English proficient (NEP) and limited English proficient (LEP) elementary Hispanic students. PEOPLE was developed, pilot tested in 14 school districts in Los Angeles County with…

  2. INFLUENCE OF STUDENT ENGLISH UTILITY AND TEACHER EFFICACY ON ENGLISH PROFICIENCY OF HIGH SCHOOL STUDENTS

    Directory of Open Access Journals (Sweden)

    Ruth A. ORTEGA-DELA CRUZ

    2016-12-01

    Full Text Available Learning second language considers a number of factors that influence the manner in which the language is taught. Understanding of the learners’ goals and motivation for learning is one. Using descriptive-correlational research design, this study determined the influence of student English utility and teacher efficacy on the students’ English proficiency. A total of 101 students from first year to fourth year level served as the respondents of the study. The study quantified the students’ perception towards English utility and their evaluation of English teacher efficacy which employed a researcher-made survey questionnaire. Results revealed high positive perceptions of students towards English utility. Analysis of variance revealed significant differences in the perceptions of high school students on the efficacy of their English teachers. Correlation coefficients indicated a positive linear relationship among the given variables. The p-value revealed significant relationship of teacher efficacy (r = .691, p-value = .000 and English utility (r = .467, p-value = .000 to students’ English proficiency. Results of regression statistics revealed that English utility has no significant influence on the student English proficiency. Therefore, the main factor that must still be considered then should be the teacher. Finally, there is an explicit indication that high level of teachers’ efficacy performing in teaching has much powerful influence on the English proficiency of high school students. Thus improving the methods of teaching English provides a better way of motivating students to achieve higher levels of proficiency in the future.

  3. Does Year 12 French Improve Proficiency? Student Views and Student Performance.

    Science.gov (United States)

    Martin, Anne L.

    1994-01-01

    Discusses the attitudes of students concerning the benefit of Year 12 foreign language courses to the development of their oral and aural proficiency in the target language, i.e., French. While most students felt that their ability to speak and understand spoken French had improved as a result of the course, some expressed dissatisfaction with…

  4. The Reading Habits of Developmental College Students at Different Levels of Reading Proficiency.

    Science.gov (United States)

    Sheorey, Ravi; Mokhtari, Kouider

    1994-01-01

    Examines differences in reading habits of developmental college students with varying levels of reading proficiency. Finds that subjects spent an unusually low amount of time on academic reading and even less time on nonacademic reading. Finds no significant differences between high- and low-proficient readers with regard to amount of time spent…

  5. Reading Habits of University ESL Students at Different Levels of English Proficiency and Education.

    Science.gov (United States)

    Mokhtari, Kouider; Sheorey, Ravi

    1994-01-01

    Examines the degree to which the levels of English proficiency (high vs. low) and education (graduate vs. undergraduate) of English-as-a-Second-Language (ESL) students were associated with differences in their reading behaviors. Finds that the subjects' level of education and English proficiency were associated with their reading behavior…

  6. Race cars and the hellbox:Understanding the development of proficiency among digital art students

    OpenAIRE

    Paquette, Andrew; Reedy, Gabriel; Hatzipanagos, Stylianos

    2016-01-01

    Educating students in the discipline of digital art to a professional standard has generally proven difficult. In an effort to understand the problem, a first-year undergraduate modelling course cohort was observed. Some students in this course progressed from being novices to acquiring proficiency during the nine-week term of the course. Computer Graphics (CG) modelling professionals evaluated student work to confirm their progress. Traditional models of proficiency development expect that p...

  7. The relationship between automatic assessment of oral proficiency and other indicators of first year students' linguistic abilities

    CSIR Research Space (South Africa)

    De Wet, Febe

    2012-11-01

    Full Text Available Academic literacy proficiency is key to the success of a student at university. Currently, the large-scale assessment of language proficiency, particularly at higher education levels, is dominated by reading and writing tests because listening...

  8. Chinese ESL Students' Learning Strategies: A Look at Frequency, Proficiency, and Gender.

    Science.gov (United States)

    Foong, Kwah Poh; Goh, Christine C. M.

    1997-01-01

    Examines the learning strategies of English-as-Second-Language students in the People's Republic of China. Surveyed the frequency of strategy use to determine how it is influenced by learners' proficiency level and gender. (Author/VWL)

  9. LEP physics

    CERN Multimedia

    CERN. Geneva

    2001-01-01

    Various aspects of the physics made at LEP 1 and LEP 2 (precision measurements and searches for new physics will be discussed, from the fundamental motivations to the publication of the results. The techniques and tools developed and applied to reach the a priori goals of LEP (beam energy measurement, luminosity determination, event selection,...) will be described with a few meaningful examples. The high level techniques & bright ideas which allowed LEP to exceed by a large amount its design performance, and the consequences outcome will also be presented.

  10. Digging Deeper: Understanding Non-Proficient Students through an Understanding of Reading and Motivational Profiles

    Science.gov (United States)

    Smith, Hiawatha D.

    2017-01-01

    With the continued emphasis on accountability for students, schools are working to increase the reading academic performance of their non-proficient students. Many remedial approaches fail to identify the individual strengths and weaknesses and tend to treat these students with a singular remedial focus on word identification (Allington, 2001). In…

  11. Using genre pedagogy to promote student proficiency in the language required for interpreting line graphs

    Science.gov (United States)

    Smit, Jantien; Bakker, Arthur; van Eerde, Dolly; Kuijpers, Maggie

    2016-09-01

    The importance of language in mathematics learning has been widely acknowledged. However, little is known about how to make this insight productive in the design and enactment of language-oriented mathematics education. In a design-based research project, we explored how language-oriented mathematics education can be designed and enacted. We drew on genre pedagogy to promote student proficiency in the language required for interpreting line graphs. In the intervention, the teacher used scaffolding strategies to focus students' attention on the structure and linguistic features of the language involved in this particular domain. The research question addressed in this paper is how student proficiency in this language may be promoted. The study comprised nine lessons involving 22 students in grades 5 and 6 (aged 10-12); of these students, 19 had a migrant background. In light of the research aim, we first describe the rationale behind our design. Next, we illustrate how the design was enacted by means of a case study focusing on one student in the classroom practice of developing proficiency in the language required for interpreting line graphs. On the basis of pre- and posttest scores, we conclude that overall their proficiency has increased. Together, the results indicate that and how genre pedagogy may be used to help students become more proficient in the language required in a mathematical domain.

  12. Assessing students' English language proficiency during clinical placement: A qualitative evaluation of a language framework.

    Science.gov (United States)

    San Miguel, Caroline; Rogan, Fran

    2015-06-01

    The increase in nursing students for whom English is an additional language requires clinical facilitators to assess students' performance regarding clinical skills, nursing communication and English language. However, assessing language proficiency is a complex process that is often conflated with cultural norms and clinical skills, and facilitators may lack confidence in assessing English language. This paper discusses an evaluation of a set of guidelines developed in a large metropolitan Australian university to help clinical facilitators make decisions about students' English language proficiency. The study found that the guidelines were useful in helping facilitators assess English language. However, strategies to address identified language problems needed to be incorporated to enable the guidelines to also be used as a teaching tool. The study concludes that to be effective, such guidelines need embedding within a systematic approach that identifies and responds to students who may be underperforming due to a low level of English language proficiency. Copyright © 2015 Elsevier Ltd. All rights reserved.

  13. LEP results

    International Nuclear Information System (INIS)

    Thresher, J.J.

    1990-01-01

    The first period of LEP operation ended on 22nd December 1989, rather less than two weeks before the start of this Conference. It brought to a close a most exciting time at CERN, starting in July 1989, when those involved in commissioning LEP attempted for the first time to start up the complete machine and then to give the experiments their first taste of what LEP had in store for them. By July almost all sections of LEP had been individually checked out. In particular, the entire injection chain had been tested with positrons a year earlier when a very successful injection test into the first completed LEP octant was carried out. Also by July the LEP detectors had been installed and were ready to take data with at least the most important sub-detector systems able to operate. By way of introduction a brief history of these first months of LEP operation is given in this paper. The first steps in bringing LEP into operation started on 14th July 1989 when positrons were injected into the ring for the first time. After only 55 minutes of magnet adjustments they had completed a full turn at the injection energy of 20 GeV. Further commissioning with positrons at this energy then followed to establish a stable circulating beam and then on 25th July the first electrons were successfully injected into LEP. By 31st July, after much work on beam accumulation had been done, a current of some 250 μA of positrons, i.e. about 60 μA in each of the four bunches was reached at 20 GeV and four days later on 4th August positrons were successfully ramped up to 47.5 GeV. Finally, at 23.15 on 13th August positrons were successfully ramped up to 47.5 GeV. Finally, at 23.15 on 13th August, just less than one month after the start of LEP commissioning, electrons and positrons were brought into collision at an energy of 45.5 GeV per beam

  14. Students' proficiency scores within multitrait item response theory

    Science.gov (United States)

    Scott, Terry F.; Schumayer, Daniel

    2015-12-01

    In this paper we present a series of item response models of data collected using the Force Concept Inventory. The Force Concept Inventory (FCI) was designed to poll the Newtonian conception of force viewed as a multidimensional concept, that is, as a complex of distinguishable conceptual dimensions. Several previous studies have developed single-trait item response models of FCI data; however, we feel that multidimensional models are also appropriate given the explicitly multidimensional design of the inventory. The models employed in the research reported here vary in both the number of fitting parameters and the number of underlying latent traits assumed. We calculate several model information statistics to ensure adequate model fit and to determine which of the models provides the optimal balance of information and parsimony. Our analysis indicates that all item response models tested, from the single-trait Rasch model through to a model with ten latent traits, satisfy the standard requirements of fit. However, analysis of model information criteria indicates that the five-trait model is optimal. We note that an earlier factor analysis of the same FCI data also led to a five-factor model. Furthermore the factors in our previous study and the traits identified in the current work match each other well. The optimal five-trait model assigns proficiency scores to all respondents for each of the five traits. We construct a correlation matrix between the proficiencies in each of these traits. This correlation matrix shows strong correlations between some proficiencies, and strong anticorrelations between others. We present an interpretation of this correlation matrix.

  15. Student Engagement in Long-Term Collaborative EFL Storytelling Activities: An Analysis of Learners with English Proficiency Differences

    Science.gov (United States)

    Huang, Yun-Yin; Liu, Chen-Chung; Wang, Yu; Tsai, Chin-Chung; Lin, Hung-Ming

    2017-01-01

    English proficiency difference among students is a challenging pedagogical issue in EFL classrooms worldwide. Collaborative digital storytelling has been adopted in language learning settings to increase motivation and engagement, especially for young learners. However, it remains unknown whether students of different proficiency levels can…

  16. After LEP

    International Nuclear Information System (INIS)

    Anon.

    1986-01-01

    The idea emerged for a ring of superconducting magnets, installed above the LEP ring, to collide protons together (or protons with antiprotons) at as high an energy as possible. Some work has been done to firm up the ideas for the new Collider: determining the best configuration for the proton-proton option and establishing its advantages over a realistic proton-antiproton option; assessing collisions between the electron beam of LEP and one proton beam; designing a complete section of the machine; making tentative designs of superconducting magnets providing between 8 and 10 tesla, and working out a European magnet development programme towards this goal; outlining where and how the various types of collisions could be exploited in the LEP tunnel. (orig./HSI).

  17. LEP commissioning

    International Nuclear Information System (INIS)

    Anon.

    1989-01-01

    On 14 July, as ail France celebrated the bicentenary of its revolution, CERN was the scene of a revolution of a very different kind. At 16.30 hrs, a 20 GeV positron beam went round the 27 kilometres (most of which is under French territory) of CERN's new LEP electron-positron storage ring. After more than a decade of careful planning and preparation, almost six years after groundbreaking, and two years after the start of equipment installation, the LEP team delivered on the day they had told people to mark five years ago

  18. English Proficiency and Admission and Graduation of Post-Secondary Students at a Puerto Rican University

    Science.gov (United States)

    Alea, Jamie

    2009-01-01

    This dissertation has examined English proficiency as a mediating social factor within the occupational structure of Puerto Rico. It included an analysis of the educational records of 641 students majoring in industrial engineering, nursing, education and finance of the University of Puerto Rico, Mayaguez from 1998-2000. The investigation…

  19. Attitudes toward Seeking Professional Counseling Services among Chinese International Students: Acculturation, Ethnic Identity, and English Proficiency

    Science.gov (United States)

    Li, Jiaqi; Marbley, Aretha Faye; Bradley, Loretta J.; Lan, William

    2016-01-01

    The authors examined the help-seeking attitudes of 109 Chinese international students studying in the United States. Results revealed that significant relationships exist among acculturation, ethnic identity, English proficiency, and attitudes toward seeking professional counseling services. Limitations and recommendations for future research are…

  20. Attitudes and Attained English Language Proficiency of University Students in Thailand: A Sociolinguistic Study.

    Science.gov (United States)

    Boykin, Arsene; Trungamphai, Arunthadee

    English proficiency of Thai university students studying English as a Foreign Language (EFL) was studied in relation to attitudinal scores on social, economic, travel, or prestige scales. Secondarily, the subjects' attitudes toward their native group and toward the target language group, and their motives for learning English were studied in…

  1. Supporting the Language Development of Limited English Proficient Students through Arts Integration in the Primary Grades

    Science.gov (United States)

    Brouillette, Liane

    2012-01-01

    This article looks at how arts integration can boost the language development of limited English proficient students in kindergarten through second grade. I first review existing research on how young children learn and describe the special challenges faced by children who must learn in an unfamiliar language. I then identify arts-based mechanisms…

  2. RISC vs. Non-RISC Schools: A Comparison of Student Proficiencies for Reading, Writing, and Mathematics

    Science.gov (United States)

    Haystead, Mark W.

    2010-01-01

    This report describes the findings for an analysis of data provided by the Re-Inventing Schools Coalition (RISC). A comparison was made between schools at seven districts that employ the RISC model and eight non-RISC districts (hereinafter referred to as RISC and non-RISC schools) on the percentages of students who scored proficient or above on…

  3. LEP Inauguration

    International Nuclear Information System (INIS)

    Anon.

    1989-01-01

    On 13 November, Heads of State, Heads of Government and Ministers from CERN's 14 Member States, together with more than a thousand invited guests, attended the inauguration ceremony of LEP, CERN's new 27-kilometre electron-positron collider

  4. LEP Traceability

    CERN Document Server

    Billen, R

    2000-01-01

    After more than ten years of production for high energy physics, CERN's current flagship, LEP, will be closed down definitively October 1st, 2000. Starting immediately, some 30,000 tonnes of LEP materials will be removed from the tunnel to make room for LHC installation. The dismantling project is a major undertaking in terms of resources and constraints, which has to be completed in less than one year. Moreover, since LEP is classified as a nuclear installation in France (as if it was a nuclear power plant), special procedures have to be followed in addition to the normal environmental and safety issues. One major facet of the project is the "traceability" of everything that comes out of the LEP tunnel. This implies that each piece of equipment must be identified and tracked from its origin through any temporary storage to its final destination. Special procedures have to be followed for all materials even if they are not radioactive. As much of the equipment as possible will be recycled or disposed of. This...

  5. An exploratory study of proficient undergraduate Chemistry II students' application of Lewis's model

    Science.gov (United States)

    Lewis, Sumudu R.

    This exploratory study was based on the assumption that proficiency in chemistry must not be determined exclusively on students' declarative and procedural knowledge, but it should be also described as the ability to use variety of reasoning strategies that enrich and diversify procedural methods. The study furthermore assumed that the ability to describe the structure of a molecule using Lewis's model and use it to predict its geometry as well as some of its properties is indicative of proficiency in the essential concepts of covalent bonding and molecule structure. The study therefore inquired into the reasoning methods and procedural techniques of proficient undergraduate Chemistry II students when solving problems, which require them to use Lewis's model. The research design included an original survey, designed by the researcher for this study, and two types of interviews, with students and course instructors. The purpose of the survey was two-fold. First and foremost, the survey provided a base for the student interview selection, and second it served as the foundation for the inquiry into the strategies the student use when solving survey problems. Twenty two students were interviewed over the course of the study. The interview with six instructors allowed to identify expected prior knowledge and skills, which the students should have acquired upon completion of the Chemistry I course. The data, including videos, audios, and photographs of the artifacts produced by students during the interviews, were organized and analyzed manually and using QSR NVivo 10. The research found and described the differences between proficient and non-proficient students' reasoning and procedural strategies when using Lewis's model to describe the structure of a molecule. One of the findings clearly showed that the proficient students used a variety of cues to reason, whereas other students used one memorized cue, or an algorithm, which often led to incorrect representations in

  6. An Investigation Into The Learning Styles, English Proficiency And Assessment Performance Of Medical Students

    OpenAIRE

    Toh Peng Yeow; Mark Kiak Min TAN; Li-Cher LOH; Julia BLITZ

    2010-01-01

    Appreciation of learning styles can be of use tohelp both educators and students to enhance theeffectiveness of an educational experience. It has beennoticed that some students at this College are not verygood at expressing themselves in either written orspoken English. Our study aimed to identify thestudent’s learning styles; assess whether there isany correlation between learning style, baselinedemographic data and self rated proficiency in Englishlanguage; and assess their associations wit...

  7. Language Learning Strategies Used By Different English Proficiency Students Of State Senior High School 3 Malang

    OpenAIRE

    EMANTO, YUANITA

    2013-01-01

    English is one of International languages in the world and mainly used in International forums. Because of its importance, Indonesian government decides to make English as a formal subject in schools. Students are expected to have basic competences in four skills those are listening, speaking, reading, and writing comprehensively to reach functional literate. Students should have strategies to improve their proficiency and skill in English. The aims of this study are to find out (1) how langu...

  8. PROFICIENCY LEVEL AND LANGUAGE LEARNING STRATEGIES AMONG JORDANIAN STUDENTS AT UNIVERSITI UTARA MALAYSIA

    OpenAIRE

    Jaradat, Eshraq Mahmoud Mustafa; Bakrin, Haryati

    2017-01-01

    This study examines the relationship between proficiency level and language learning strategies (LLSs) among Jordanian students enrolled at Universiti Utara Malaysia. The frequency level of the LLSs employed by the students was also investigated. The theoretical foundation for the study was provided by three comprehensive theories which are the Behaviorism, the Cognitive Psychology, and the Schema Theory. The data for the LLSs was obtained from using Oxford’s (1990) Strategy Inventory for Lan...

  9. Metacognitive awareness of reading strategies of University of Botswana English as Second Language students of different academic reading proficiencies

    Directory of Open Access Journals (Sweden)

    Joel M. Magogwe

    2013-02-01

    Full Text Available This study explored metacognitive awareness level of University of Botswana students in the Faculty of Social Sciences. It also considered the more recent research focusing on the role of metacognitive awareness in reading and how it relates to proficiency. The following questions are addressed: (1 What are the self-reported reading proficiencies of the University of Botswana students? (2 Are the University of Botswana students aware of their metacognitive reading strategies? (3 What kind of metacognitive reading strategies are frequently used? (4 Is there a difference in metacognitive awareness of reading strategies used by high- and low-proficiency students respectively? The Survey of Reading Strategies Questionnaire (SORS developed by Mokhtari and Sheorey (2002, and the semi-structured interview technique were used to collect data for this study. The findings indicate that University of Botswana English as Second Language (ESL students reported high reading proficiency and high use of metacognitive strategies, but there was no vast difference in terms of proficiency. Students who reported their proficiency as high had an edge over low-proficiency ones mainly because their management and monitoring of reading was guided more by the goals they have set themselves than by the tests and assignments they were supposed to write.

  10. LEP inauguration

    International Nuclear Information System (INIS)

    Anon.

    1990-01-01

    13 November saw the culmination at CERN of weeks of intricate planning to put together a fitting formal inauguration of LEP, CERN's 27-kilometre electron-positron collider. The day was to witness an event worthy of the many years of assiduous endeavour to bring into being the world's largest scientific machine, a prime example of international collaboration and the portent of a new era in fundamental research.

  11. LEP inauguration

    Energy Technology Data Exchange (ETDEWEB)

    Anon.

    1990-01-15

    13 November saw the culmination at CERN of weeks of intricate planning to put together a fitting formal inauguration of LEP, CERN's 27-kilometre electron-positron collider. The day was to witness an event worthy of the many years of assiduous endeavour to bring into being the world's largest scientific machine, a prime example of international collaboration and the portent of a new era in fundamental research.

  12. Does Computer Use Promote the Mathematical Proficiency of ELL Students?

    Science.gov (United States)

    Kim, Sunha; Chang, Mido

    2010-01-01

    The study explored the effects of computer use on the mathematical performance of students with special attention to ELL students. To achieve a high generalizability of findings, the study used a U.S. nationally representative database, the Early Childhood Longitudinal Survey Kindergarten Cohort (ECLS-K), and adopted proper weights. The study…

  13. 76 FR 66318 - Announcement of Funding Awards; Limited English Proficiency Initiative Program (LEPI), Fiscal...

    Science.gov (United States)

    2011-10-26

    ... limited English proficiency (LEP), and develop and implement a system to provide those services so LEP... Awards; Limited English Proficiency Initiative Program (LEPI), Fiscal Year 2010/2011 AGENCY: Office of... (NOFA) for the Limited English Proficiency Initiative (LEPI) Program for Fiscal Year (FY) 2010/2011...

  14. A Multilevel Latent Growth Curve Approach to Predicting Student Proficiency

    Science.gov (United States)

    Choi, Kilchan; Goldschmidt, Pete

    2012-01-01

    Value-added models and growth-based accountability aim to evaluate school's performance based on student growth in learning. The current focus is on linking the results from value-added models to the ones from growth-based accountability systems including Adequate Yearly Progress decisions mandated by No Child Left Behind. We present a new…

  15. The relationship between English language learning strategies and proficiency of pre-university students: A study case of UMS

    Science.gov (United States)

    Kiram, Johannah Jamalul; Sulaiman, Jumat; Swanto, Suyansah; Din, Wardatul Akmam

    2014-07-01

    This paper seeks to investigate the relationship between language learning strategies and proficiency in English. Fifty-six pre-university students (22 males, 34 females) of University Malaysia Sabah participated in this study. Oxford's Strategy Inventory for Language Learning (SILL) self-report questionnaire was adopted to identify the students' language learning strategies, whereas their proficiencies were judged based on their Malaysian University English Test (MUET) Results. Pearson's correlation coefficient, Spearman's rank correlation coefficient and the t-test were utilized to make statistical interpretation about the relationship. The knowledge obtained from this study will be helpful for future studies on how to improve the quality of learning and proficiency in English.

  16. Relationship between phonological awareness and spelling proficiency in first-grade students

    Directory of Open Access Journals (Sweden)

    Nasibe Soltaninejad

    2014-12-01

    Full Text Available Background and Aim: Phonological awareness (consisting of phoneme, syllable and intra-syllable awareness is an important part of receptive and expressive language; it facilitates reading and writing skills through phonological re-coding. Multiple studies in several languages have studied the relationship between phonological awareness and dictation. This research is based on a study of the relationship between phonological skill and spelling score in first-grade Persian students.Methods: Four hundred first-grade students participated in the study, including 209 girls and 191 boys. A phonological awareness test was individually administered for each student and then a spelling exam was administered in groups. The correlation between the two tests was studied using a simple regression model. The comparison of mean scores of girls and boys was evaluated employing an independent t-test.Results: A correlation coefficient of 0.82 was obtained between phonological awareness and spelling proficiency (p<0.001. Phonological skill sub-tests also showed a significant correlation with spelling proficiency (highest for phoneme awareness r=0.34 and lowest for rhyme awareness r=0.12. The mean scores of girls and boys differed significantly (p<0.05.Conclusion: There is a strong positive association between phonological awareness and spelling proficiency. Therefore, if phonological skill is improved, spelling score can be enhanced.

  17. Observed hierarchy of student proficiency with period, frequency, and angular frequency

    Directory of Open Access Journals (Sweden)

    Nicholas T. Young

    2018-01-01

    Full Text Available In the context of a generic harmonic oscillator, we investigated students’ accuracy in determining the period, frequency, and angular frequency from mathematical and graphical representations. In a series of studies including interviews, free response tests, and multiple choice tests developed in an iterative process, we assessed students in both algebra-based and calculus-based, traditionally instructed university-level introductory physics courses. Using the results, we categorized nine skills necessary for proficiency in determining period, frequency, and angular frequency. Overall results reveal that, postinstruction, proficiency is quite low: only about 20%–40% of students mastered most of the nine skills. Next, we used a semiquantitative, intuitive method to investigate the hierarchical structure of the nine skills. We also employed the more formal item tree analysis method to verify this structure and found that the skills form a multilevel, nonlinear hierarchy, with mastery of some skills being prerequisite for mastery in other skills. Finally, we implemented a targeted, 30-min group-work activity to improve proficiency in these skills and found a 1 standard deviation gain in accuracy. Overall, the results suggest that many students currently lack these essential skills, targeted practice may lead to required mastery, and that the observed hierarchical structure in the skills suggests that instruction should especially attend to the skills lower in the hierarchy.

  18. The Opinions of Nursing Students Regarding the Nursing Process and Their Levels of Proficiency in Turkey

    Science.gov (United States)

    Taskın Yilmaz, Feride; Sabanciogullari, Selma; Aldemir, Kadriye

    2015-01-01

    Introduction: Nursing process, as a scientific method of nursing practice, is an important tool for putting nursing knowledge into practice which increases the quality of nursing care. The study was aimed to determine the opinions of nursing students regarding the nursing process and their levels of proficiency. Methods: A total of 44 nursing students participated in this descriptive study. Data were collected by a three-part questionnaire including the opinion of students on nursing process, Gordon’s functional health patterns model and the NANDA diagnoses. Data were analyzed by SPSS software. Results: Most of the students (65.9%) believed that the nursing process was necessary. half of the students explained the diagnosis, 58.3% explained the planning, 41.3% explained the implementation, and 43.6% explained the evaluation sufficiently. Conclusion: It is suggested for instructors to use different teaching methods in order to develop critical thinking while teaching the nursing process. PMID:26744726

  19. The Opinions of Nursing Students Regarding the Nursing Process and Their Levels of Proficiency in Turkey.

    Science.gov (United States)

    Taskın Yilmaz, Feride; Sabanciogullari, Selma; Aldemir, Kadriye

    2015-12-01

    Nursing process, as a scientific method of nursing practice, is an important tool for putting nursing knowledge into practice which increases the quality of nursing care. The study was aimed to determine the opinions of nursing students regarding the nursing process and their levels of proficiency. A total of 44 nursing students participated in this descriptive study. Data were collected by a three-part questionnaire including the opinion of students on nursing process, Gordon's functional health patterns model and the NANDA diagnoses. Data were analyzed by SPSS software. Most of the students (65.9%) believed that the nursing process was necessary. half of the students explained the diagnosis, 58.3% explained the planning, 41.3% explained the implementation, and 43.6% explained the evaluation sufficiently. It is suggested for instructors to use different teaching methods in order to develop critical thinking while teaching the nursing process.

  20. Deaf college students' mathematical skills relative to morphological knowledge, reading level, and language proficiency.

    Science.gov (United States)

    Kelly, Ronald R; Gaustad, Martha G

    2007-01-01

    This study of deaf college students examined specific relationships between their mathematics performance and their assessed skills in reading, language, and English morphology. Simple regression analyses showed that deaf college students' language proficiency scores, reading grade level, and morphological knowledge regarding word segmentation and meaning were all significantly correlated with both the ACT Mathematics Subtest and National Technical Institute for the Deaf (NTID) Mathematics Placement Test scores. Multiple regression analyses identified the best combination from among these potential independent predictors of students' performance on both the ACT and NTID mathematics tests. Additionally, the participating deaf students' grades in their college mathematics courses were significantly and positively associated with their reading grade level and their knowledge of morphological components of words.

  1. The Role of Attachment, Travel Experiences and English Proficiency in International Students' Acculturative Stress and Depressive Symptoms

    Science.gov (United States)

    Smiljanic, Iskra

    2017-01-01

    This study examined the relationship between attachment, travel experiences, and English proficiency and international students' acculturative stress and depressive symptoms. A total of 91 graduate international students completed online surveys. Pearson correlations showed that both attachment anxiety and avoidance were positively correlated with…

  2. Attitudes of Jordanian University Students towards Using Online Chat Discourse with Native Speakers of English for Improving Their Language Proficiency

    Science.gov (United States)

    Mahfouz, Safi M.; Ihmeideh, Fathi M.

    2009-01-01

    This study aims to investigate Jordanian university students' attitudes towards using video and text chat discourse with anonymous native speakers of English to improve their English proficiency. To achieve this aim, a questionnaire was designed. The study sample consisted of 320 university students enrolled in two Jordanian universities. Results…

  3. Competitive Team-Based Learning versus Group Investigation with Reference to the Language Proficiency of Iranian EFL Intermediate Students

    Science.gov (United States)

    Hosseini, Seyed Mohammad Hassan

    2014-01-01

    This paper is a report on an experimental study which intended to look into the possible effects of Competitive Team-Based Learning (CTBL) vis-à-vis Group Investigation (GI) method of Cooperative Learning (CL) on the language proficiency of Iranian EFL intermediate students. Seventy homogeneous Iranian intermediate students were selected out of a…

  4. Learning Science and English: How School Reform Advances Scientific Learning for Limited English Proficient Middle School Students

    OpenAIRE

    Minicucci, Catherine

    1996-01-01

    This article presents findings from the School Reform and Student Diversity Study, a 4-year project to locate and analyze schools offering exemplary science and mathematics programs to middle school students with limited proficiency in English. In contrast to the vast majority of schools, the four schools described in this article give these students access to stimulating science and mathematics curricula by instructing them either in the students' primary language or in English using shelter...

  5. submitter LEP precision results

    CERN Document Server

    Kawamoto, T

    2001-01-01

    Precision measurements at LEP are reviewed, with main focus on the electroweak measurements and tests of the Standard Model. Constraints placed by the LEP measurements on possible new physics are also discussed.

  6. LEP is upgraded

    CERN Multimedia

    1995-01-01

    A superconducting radio-frequency cavity is installed on the Large Electron-Positron (LEP) collider. This upgrade, known as LEP-2, allowed the accelerator to reach new, higher energies and so investigate new areas of physics.

  7. Steering the LEP project

    International Nuclear Information System (INIS)

    Adams, J.B.

    1979-01-01

    The plans for LEP are discussed with particular reference to the economic and political aspects rather than the scientific ones. The author outlines the steps which must be taken and the obstacles to be overcome before LEP can be built. Specific points considered are the energy of LEP, its size and siting and the cost and energy consumption. (W.D.L.)

  8. Initial Spanish Proficiency and English Language Development among Spanish-Speaking English Learner Students in New Mexico. REL 2018-286

    Science.gov (United States)

    Arellano, Brenda; Liu, Feng; Stoker, Ginger; Slama, Rachel

    2018-01-01

    To what extent do Spanish-speaking English learner students develop English proficiency and grade-level readiness in English language arts and math from early elementary school to upper elementary school? Is there a relationship between proficiency in a student's primary home language, Spanish, and the amount of time needed to attain fluency in…

  9. Modeling the language learning strategies and English language proficiency of pre-university students in UMS: A case study

    Science.gov (United States)

    Kiram, J. J.; Sulaiman, J.; Swanto, S.; Din, W. A.

    2015-10-01

    This study aims to construct a mathematical model of the relationship between a student's Language Learning Strategy usage and English Language proficiency. Fifty-six pre-university students of University Malaysia Sabah participated in this study. A self-report questionnaire called the Strategy Inventory for Language Learning was administered to them to measure their language learning strategy preferences before they sat for the Malaysian University English Test (MUET), the results of which were utilised to measure their English language proficiency. We attempted the model assessment specific to Multiple Linear Regression Analysis subject to variable selection using Stepwise regression. We conducted various assessments to the model obtained, including the Global F-test, Root Mean Square Error and R-squared. The model obtained suggests that not all language learning strategies should be included in the model in an attempt to predict Language Proficiency.

  10. Improvement in Student Science Proficiency Through InSciEd Out

    Science.gov (United States)

    Sonju, James D.; Leicester, Jean E.; Hoody, Maggie; LaBounty, Thomas J.; Frimannsdottir, Katrin R.; Ekker, Stephen C.

    2012-01-01

    Abstract Integrated Science Education Outreach (InSciEd Out) is a collaboration formed between Mayo Clinic, Winona State University, and Rochester Public Schools (MN) with the shared vision of achieving excellence in science education. InSciEd Out employs an equitable partnership model between scientists, teachers, education researchers, and the community. Teams of teachers from all disciplines within a single school experience cutting-edge science using the zebrafish model system, as well as current pedagogical methods, during a summer internship at the Mayo Clinic. Within the internship, the teachers produce new curriculum that directly addresses opportunities for science education improvement at their own school. Zebrafish are introduced within the new curriculum to support a living model of the practice of science. Following partnership with the InSciEd Out program and 2 years of implementation in the classroom, teacher-interns from a K–8 public school reported access to local scientific technology and expertise they had not previously recognized. Teachers also reported improved integration of other disciplines into the scientific curriculum and a flow of concepts vertically from K through 8. Students more than doubled selection of an Honors science track in high school to nearly 90%. 98% of students who took the Minnesota Comprehensive Assessments in their 5th and 8th grade year (a span that includes 2 years of InSciEd Out) showed medium or high growth in science proficiency. These metrics indicate that cooperation between educators and scientists can result in positive change in student science proficiency and demonstrate that a higher expectation in science education can be achieved in US public schools. PMID:23244687

  11. The relationship between self-efficacy and reading proficiency of first-year students: An exploratory study

    Directory of Open Access Journals (Sweden)

    Naomi A.N.Y. Boakye

    2015-04-01

    Full Text Available Self-efficacy, which is the belief about one’s ability to perform a task successfully, has been widely acknowledged as important in learning. This affective factor, though not explicitly evident, has been said to play an important role in academic performance. However, its role in reading development has not been widely investigated. To determine the relationship between self-efficacy and reading proficiency, a study was conducted with first-year students in a South African tertiary institution. Students’ self-efficacy levels were elicited through a questionnaire and their reading proficiency was obtained through the Test of Academic Literacy levels (TALL, which essentially assesses reading proficiency. An analysis of variance showed a robust relationship between reading self-efficacy and reading proficiency for this cohort of students. Regression analysis conducted with other affective factors showed self-efficacy as the best predictor of students’ reading proficiency. Results are discussed as they relate to previous research and recommendations are made to include the development of self-efficacy in reading instruction.

  12. LEP beampipe section

    CERN Multimedia

    1989-01-01

    Short section of beampipe from the Large Electron Positron collider (LEP, for short). With its 27-kilometre circumference, LEP was the largest electron-positron accelerator ever built and ran from 1989 to 2000 at CERN. During 11 years of research, LEP's experiments provided a detailed study of the electroweak interaction. Measurements performed at LEP also proved that there are three – and only three – generations of particles of matter. LEP was closed down on 2 November 2000 to make way for the construction of the Large Hadron Collider in the same tunnel.

  13. LEP tunnel monorail

    CERN Multimedia

    1985-01-01

    A monorail from CERN's Large Electron Positron collider (LEP, for short). It ran around the 27km tunnel, transporting equipment and personnel. With its 27-kilometre circumference, LEP was the largest electron-positron accelerator ever built and ran from 1989 to 2000. During 11 years of research, LEP's experiments provided a detailed study of the electroweak interaction. Measurements performed at LEP also proved that there are three – and only three – generations of particles of matter. LEP was closed down on 2 November 2000 to make way for the construction of the Large Hadron Collider in the same tunnel.

  14. The Effectiveness of Internet-Based Peer Feedback Training on Chinese EFL College Students' Writing Proficiency

    Science.gov (United States)

    Jiang, Jiahong; Yu, Yibing

    2014-01-01

    English writing, an indispensable skill in English learning, plays an important role in improving learners' language proficiency. With the wide spread and use of wired or wireless internet, EFL students can easily help and be helped with English writing. Therefore, the application of internet-based peer feedback training on writing to foreign or…

  15. Assessing Senior Secondary School Students' Mathematical Proficiency as Related to Gender and Performance in Mathematics in Nigeria

    Science.gov (United States)

    Awofala, Adeneye O. A.

    2017-01-01

    The study investigated mathematical proficiency as related to gender and performance in mathematics among 400 Nigerian senior secondary school students from 10 elitist senior secondary schools in Lagos State using the quantitative research method within the blueprint of descriptive survey design. Data collected were analysed using the descriptive…

  16. A Study of the Relationship between Type of Dictionary Used and Lexical Proficiency in Writings of Iranian EFL Students

    Science.gov (United States)

    Vahdany, Fereidoon; Abdollahzadeh, Milad; Gholami, Shokoufeh; Ghanipoor, Mahmood

    2014-01-01

    This study aimed at investigating the relationship between types of dictionaries used and lexical proficiency in writing. Eighty TOEFL students took part in responding to two Questionnaires collecting information about their dictionary type preferences and habits of dictionary use, along with an interview for further in-depth responses. They were…

  17. The Relationship between English Language Proficiency, Academic Achievement and Self-Esteem of Non-Native-English-Speaking Students

    Science.gov (United States)

    Dev, Smitha; Qiqieh, Sura

    2016-01-01

    The present study aims to find out the relationship between English Language proficiency, self-esteem, and academic achievement of the students in Abu Dhabi University (ADU). The variables were analyzed using "t" test, chi-squire and Pearson's product moment correlation. In addition, Self-rating scale, Self-esteem inventory and Language…

  18. The Relationship between Listening Strategies Used by Iranian EFL Freshman University Students and Their Listening Proficiency Levels

    Science.gov (United States)

    Bidabadi, Farinaz Shirani; Yamat, Hamidah

    2011-01-01

    The purpose of the current study was to identify Iranian EFL freshman university students' listening proficiency levels and the listening strategies they employed to investigate the relationship between these two variables. A total of 92 freshmen were involved in this study. The Oxford Placement Test was employed to identify the learners'…

  19. A Study of Turkish High School Students' Burnout and Proficiency Levels in Relation to Their Sex

    Science.gov (United States)

    Yeni Palabiyik, Pinar

    2014-01-01

    The present study examines high school students' burnout levels. The main aims of the study are to investigate whether their burnout levels vary according to gender and grade levels, and to check the correlation between overall burnout levels and their English language proficiency attained with a specific test. The study followed a quantitative…

  20. An Exploration of the Relationship between Vietnamese Students' Knowledge of L1 Grammar and Their English Grammar Proficiency

    Science.gov (United States)

    Tran, Tammie M.

    2010-01-01

    The problem. This research study explores an important issue in the field of TESOL (Teaching English to Speakers of Other Languages) and second language acquisition (SLA). Its purpose is to examine the relationship between Vietnamese students' L1 grammar knowledge and their English grammar proficiency. Furthermore, it investigates the extent to…

  1. Gender Differences in University EFL Students' Language Proficiency Corresponding to Self-Rated Attention, Hyperactivity and Impulsivity

    Science.gov (United States)

    Liang, Hsin-Yi; Kelsen, Brent A.

    2017-01-01

    Introduction: This study examines university students' self-reported inattention, hyperactivity and impulsivity, and their relation to performance on a high-stakes English proficiency test while taking gender into consideration. Method: Inattention, hyperactivity and impulsivity attributes were assessed using the Adult Attention…

  2. CERN: Physics at LEP2

    Energy Technology Data Exchange (ETDEWEB)

    Anon.

    1994-12-15

    With the LEP2 project pushing ahead to boost CERN's LEP electronpositron collider to higher energy, in February a Workshop on Physics at LEP2 will review the studies for the preparation and interpretation of LEP2 data. The organization of this Workshop and its final report will resemble the 1989 Workshop on Z Physics at LEP1.

  3. CERN: Physics at LEP2

    International Nuclear Information System (INIS)

    Anon.

    1994-01-01

    With the LEP2 project pushing ahead to boost CERN's LEP electronpositron collider to higher energy, in February a Workshop on Physics at LEP2 will review the studies for the preparation and interpretation of LEP2 data. The organization of this Workshop and its final report will resemble the 1989 Workshop on Z Physics at LEP1

  4. The United States History = Lich Su Hoa Ky. [34 Self-Learning Packets for Vietnamese Students.

    Science.gov (United States)

    Nhi, Do Dien; And Others

    Designed primarily for Indochinese students in grades 9-12, 34 United States history self-learning packets are presented in eight sections. The publication could be used by mainstream teachers who have a number of limited English proficient (LEP) Vietnamese students in their classes or by parents to tutor their children. The packets were adapted…

  5. The Evaluation of the Effectiveness of ESP Courses in Enhancing Technical Translation Proficiency: A Case Study of ESP Course for Mechanical Engineering Students

    Science.gov (United States)

    Hatam, Amir Hussein; Shafiei, Shilan

    2012-01-01

    The purpose of the present study was twofold. Firstly, it tried to investigate the relationship between the technical English proficiency of the students of Mechanical Engineering in the universities of Iran and their technical translation proficiency in translating technical texts of Mechanics. Secondly, it attempted to evaluate the effectiveness…

  6. Competitive Team-Based Learning versus Group Investigation with Reference to the Language Proficiency of Iranian EFL Intermediate Students

    Directory of Open Access Journals (Sweden)

    Seyed Mohammad Hassan Hosseini

    2014-01-01

    Full Text Available This paper is a report on an experimental study which intended to look into the possible effects of Competitive Team-Based Learning (CTBL vis-à-vis Group Investigation (GI method of Cooperative Learning (CL on the language proficiency of Iranian EFL intermediate students. Seventy homogeneous Iranian intermediate students were selected out of a total population of 110 to serve the present study. The results of the study indicated the advantage of CTBL over GI in terms of its effect on improving the target group’s language proficiency. The results of the study were in contrast to the reports of researchers like Ab-Raza (2007, an Israeli language specialist, who have argued that students in Islamic countries “do not value diversity of ideas, beliefs, and perspectives” (p. 5 and so cannot be taught through modern methods like those of CL.

  7. A Study of the Relationship between Type of Dictionary Used and Lexical Proficiency in Writings of Iranian EFL Students

    Directory of Open Access Journals (Sweden)

    Fereidoon Vahdany

    2014-12-01

    Full Text Available This study aimed at investigating the relationship between types of dictionaries used and lexical proficiency in writing. Eighty TOEFL students took part in responding to two Questionnaires collecting information about their dictionary type preferences and habits of dictionary use, along with an interview for further in-depth responses. They were also asked to write a composition to be evaluated on their lexical proficiency. According to the results, the most frequently used dictionary type was Bilingual (E-P Desk Dictionary (BDD and the least favored dictionaries were Bilingual (P-E Desk Dictionary (BDD2 and Bilingual (P-E Mobile Dictionary (BMD. Referring to dictionaries in search of meaning during reading-writing, and after speaking-listening were the most common habits of students. Additionally, a significant relationship between the type of dictionary and lexical proficiency in participant’s writing was found. There was also a correlation between skill in dictionary use and lexical proficiency in writing. These finding entail some pedagogical benefits to enhance learners’ lexical competence by modifying the type of learners’ preferred dictionary and their habits in dictionary use.

  8. Home and Community Language Proficiency in Spanish-English Early Bilingual University Students.

    Science.gov (United States)

    Schmidtke, Jens

    2017-10-17

    This study assessed home and community language proficiency in Spanish-English bilingual university students to investigate whether the vocabulary gap reported in studies of bilingual children persists into adulthood. Sixty-five early bilinguals (mean age = 21 years) were assessed in English and Spanish vocabulary and verbal reasoning ability using subtests of the Woodcock-Muñoz Language Survey-Revised (Schrank & Woodcock, 2009). Their English scores were compared to 74 monolinguals matched in age and level of education. Participants also completed a background questionnaire. Bilinguals scored below the monolingual control group on both subtests, and the difference was larger for vocabulary compared to verbal reasoning. However, bilinguals were close to the population mean for verbal reasoning. Spanish scores were on average lower than English scores, but participants differed widely in their degree of balance. Participants with an earlier age of acquisition of English and more current exposure to English tended to be more dominant in English. Vocabulary tests in the home or community language may underestimate bilingual university students' true verbal ability and should be interpreted with caution in high-stakes situations. Verbal reasoning ability may be more indicative of a bilingual's verbal ability.

  9. ELL High School Students' Metacognitive Awareness of Reading Strategy Use and Reading Proficiency

    Science.gov (United States)

    Hong-Nam, Kay

    2014-01-01

    This study investigated the metacognitive awareness and reading strategies use of high school-­aged English language learners (ELLs) and the relationship between ELL reading strategy use and reading proficiency as measured by a standardized reading test and self-­rated reading proficiency. Results reveal that participants reported moderate use of…

  10. CAD for LEP

    CERN Multimedia

    1983-01-01

    A work station of the Computer-Aided Design system which was installed in 1982 to aid in the mechanics design for LEP. Visible on the screen is a design made for a pick-up for LEP. See Annual Report 1982 p. 79, Fig. 2.

  11. LEP and CEBAF polarimeters

    International Nuclear Information System (INIS)

    Placidi, M.; Burkert, V.; Rossmanith, R.

    1988-01-01

    This paper gives an overview on high energy electron (positron) polarimeters by describing in more detail the plans for the LEP polarimeter and the CEBAF polarimeters. Both LEP and CEBAF will have laser polarimeters. In addition CEBAF will be equipped with a Moller polarimeter (for currents below 1μA). 10 figs

  12. The LEP physics program

    International Nuclear Information System (INIS)

    Davier, M.

    1985-06-01

    The physics program of LEP is reviewed in the context of recent developments from the SpantipS collider. LEP offers the unique possibility to unambiguously explore the particle spectrum up to a mass of 100 GeV i.e. over the mass range typical of the electroweak symmetry breaking. 31 refs.

  13. LEP superconducting cavity

    CERN Multimedia

    1995-01-01

    Engineers work in a clean room on one of the superconducting cavities for the upgrade to the LEP accelerator, known as LEP-2. The use of superconductors allow higher electric fields to be produced so that higher beam energies can be reached.

  14. submitter Searches at LEP

    CERN Document Server

    Kawagoe, Kiyotomo

    2001-01-01

    Searches for new particles and new physics were extensively performed at LEP. Although no evidence for new particle/physics was discovered, the null results set very stringent limits to theories beyond the standard model. In this paper, searches at LEP and anomalies observed in the searches are presented. Future prospect of searches at the new energy frontier machines is also discussed.

  15. Review of LEP results

    CERN Document Server

    Parodi, F

    2001-01-01

    I present a review of the results obtained during 10 years of activity in b-physics at LEP. Special emphasis is put on measurements that attained precisions not even envisaged at the beginning of the LEP programme (V/sub ub/ and Delta m/sub s/). Finally the impact of these measurements on the CKM parameters determination is presented. (16 refs).

  16. The Needs and Motivation of Japanese University Students with Low English Proficiency within the Framework of Self-determination Theory

    OpenAIRE

    杉森, 建太郎; Kentaro, Sugimori; 昭和女子大学総合教育センター

    2007-01-01

    Self-determination theory explains that the fulfillment of the three basic psychological needs-autonomy, competence, and relatedness-will lead to intrinsic motivation or the internalization of extrinsic motivation, which can result in successful learning. In this pilot study, I focused on non-English major Japanese university students with low English proficiency to find out the relationships between their basic psychological needs and motivation. Unlike the initial expectation, the autonomy ...

  17. Using Complementary Learning Clusters in Studying Literature to Enhance Students' Medical Humanities Literacy, Critical Thinking, and English Proficiency.

    Science.gov (United States)

    Liao, Hung-Chang; Wang, Ya-Huei

    2016-04-01

    This study examined whether students studying literature in complementary learning clusters would show more improvement in medical humanities literacy, critical thinking skills, and English proficiency compared to those in conventional learning clusters. Ninety-three students participated in the study (M age = 18.2 years, SD = 0.4; 36 men, 57 women). A quasi-experimental design was used over 16 weeks, with the control group (n = 47) working in conventional learning clusters and the experimental group (n = 46) working in complementary learning clusters. Complementary learning clusters were those in which individuals had complementary strengths enabling them to learn from and offer assistance to other cluster members, hypothetically facilitating the learning process. Measures included the Medical Humanities Literacy Scale, Critical Thinking Disposition Assessment, English proficiency tests, and Analytic Critical Thinking Scoring Rubric. The results showed that complementary learning clusters have the potential to improve students' medical humanities literacy, critical thinking skills, and English proficiency. © The Author(s) 2016.

  18. The relationship between constructivist supervisory practices, school climate, and student proficiency in reading, mathematics, and science: Evidence from NELS:88

    Science.gov (United States)

    Molnar, John Alexander

    In an effort to improve instruction and student learning, school reform efforts have become prevalent. School reformers have examined many aspects of the school experience, including learning theories such as behaviorism and constructivism, the changing roles of teachers and supervisors, and even the concept of the school itself. The theoretical framework for this study centered around constructivist learning theory. The study itself focused on the application of constructivist learning theory to the supervisory process. The study examined five areas of interest: (a) teachers' perceptions of constructivist supervisory behavior; (b) teachers' perceptions of efficacy and control in the classroom; (c) teachers' perceptions of school climate; (d) teachers' perceptions of job satisfaction, and (e) the influences of each of the aforementioned on student proficiency in mathematics, reading, and science. Data for the study was drawn from the first follow-up survey of the National Educational Longitudinal Study of 1988 (NELS: 88). NELS: 88 investigated a wide variety of factors that influence the educational process. The first follow-up focuses on environmental factors that affect teachers and students. Variables were selected from the NELS:88 data set that represented the areas to be examined. Factor analysis and correlational analysis were applied to ensure that the variables were measuring distinct constructs and to determine ways they could be grouped for analysis. Multiple linear regression analysis was applied to determine relationships among the individual and composite variables, controlling for student and teacher demographic factors. The results of the study suggest that varying relationships do exist between constructivist supervisory practices and the constructs measuring school climate and job satisfaction. The results also suggest that varying relationships exist between each of these factors and student proficiency in mathematics, reading, and science

  19. Multijets at LEP

    CERN Document Server

    Lutz, P

    1996-01-01

    At LEP 2, multi-jet events will become an important subject, both for standard physics (measurements of the W boson mass and the three-boson couplings) and in direct searches for new particles within or beyond the Standard Model. This presentation gives a comprehensive report of what has been learnt in this field at LEP 1 and LEP 1.5, emphasizing the measurements of the colour factors in QCD and the difficulties encountered when searching Higgs bosons in multi-jet events.

  20. Groundbreaking for LEP

    International Nuclear Information System (INIS)

    Anon.

    1983-01-01

    On 13 September, CERN found itself once more in the international spotlight when President Frangois Mitterrand of France and President Pierre Aubert of Switzerland arrived for the official 'groundbreaking' ceremony for the 27-kilometre ring of the LEP electron-positron collider. As well as the Presidents of the two CERN host states under whose territory LEP will be constructed, there were ranking representatives of the CERN Member States, together with those of other countries who will take part in the first LEP experiments, expanding further the already large community of CERN users

  1. submitter LEP Higgs

    CERN Document Server

    Mori, T

    2001-01-01

    As the LEP experiments verified the gauge interactions more and more rigorously, searches for the Higgs boson, which forms the very basis of the gauge theories, were taking on more and more importance in LEP physics. How this last missing particle in the Standard Model may be discovered (or totally excluded) will be the key to new physics beyond the Standard Model. Here I briefly describe how the LEP experiments together have closed in on this God particle during their 11 year running.

  2. LEP experiments take shape

    Energy Technology Data Exchange (ETDEWEB)

    Anon.

    1986-05-15

    Excavation of the 27 kilometre tunnel and vast underground caverns for CERN's new LEP electronpositron collider is forging ahead, and equipment for the machine is arriving on the site in increasing quantities ready to attack the huge task of installation. At about the same time that LEP construction work began at CERN in 1983, physicists from some hundred research centres throughout the world began gearing up for the detailed design, construction and testing of the millions of components for the four big detectors – ALEPH, DELPHI, L3 and OPAL – which will study LEP's electron-positron collisions.

  3. LEP experiments take shape

    International Nuclear Information System (INIS)

    Anon.

    1986-01-01

    Excavation of the 27 kilometre tunnel and vast underground caverns for CERN's new LEP electronpositron collider is forging ahead, and equipment for the machine is arriving on the site in increasing quantities ready to attack the huge task of installation. At about the same time that LEP construction work began at CERN in 1983, physicists from some hundred research centres throughout the world began gearing up for the detailed design, construction and testing of the millions of components for the four big detectors – ALEPH, DELPHI, L3 and OPAL – which will study LEP's electron-positron collisions

  4. Bottonium production at LEP

    International Nuclear Information System (INIS)

    Abraham, K.J.

    1989-03-01

    The production of γ ('3S 1 ) and η b ( 1 S 0 ) with two gluons from Z decay is investigated. It is found that at LEP luminosities experimental detection will hardly be feasible. (author). 9 refs.; 1 fig

  5. Supersymmetric particles at LEP

    International Nuclear Information System (INIS)

    Barbiellini, G.; Coignet, G.; Gaillard, M.K.; Bonneaud, G.; Ellis, J.; Matteuzzi, C.; Wiik, H.

    1979-10-01

    The authors examine whether the supersymmetrization of nature at a mass scale up to 100 GeV can be confirmed or excluded by experiments with LEP. They review the qualitative features of the spectroscopy suggested by supersymmetric theories. Then they discuss possible production rates and means of detection of these particles at LEP. In this framework they make some remarks about other projects for future high energy physics machines which can be used for the study of supersymmetric phenomena. (HSI)

  6. Focus on LEP

    Energy Technology Data Exchange (ETDEWEB)

    Anon.

    1986-12-15

    When it begins operations early in 1989, the LEP electron-positron Collider now being built at CERN will provide beams of some 60 GeV (120 GeV collision energy). However with superconducting radiofrequency acceleration equipment complementing the conventional units, the beam energy eventually could be boosted to about 100 GeV per beam. In parallel with LEP construction, a vigorous development programme for these superconducting cavities has been underway at CERN.

  7. CERN: Towards LEP 200

    International Nuclear Information System (INIS)

    Anon.

    1990-01-01

    In March a cryomodule with four superconducting radiofrequency accelerating cavities operated for the first time in CERN's new LEP electron-positron collider, the result of many years of careful research and development work and an important step on the road to boost LEP energies from their initial level around 50 GeV per beam to above the 82 GeV threshold for production of W pairs

  8. Focus on LEP

    International Nuclear Information System (INIS)

    Anon.

    1986-01-01

    When it begins operations early in 1989, the LEP electron-positron Collider now being built at CERN will provide beams of some 60 GeV (120 GeV collision energy). However with superconducting radiofrequency acceleration equipment complementing the conventional units, the beam energy eventually could be boosted to about 100 GeV per beam. In parallel with LEP construction, a vigorous development programme for these superconducting cavities has been underway at CERN

  9. B physics at LEP

    International Nuclear Information System (INIS)

    Kowalewski, R.V.; Rizzo, G.; Stocchi, A.

    1995-01-01

    LEP has contributed substantially to our knowledge of B hadrons. Results will be presented on the lifetimes of weakly decaying B hadrons and on BB oscillations; in each case the LEP results are the most precise measurements of these quantities. The first observations of orbitally excited beauty mesons and of Σ b and Σ b * baryons, obtained during the past year, will be reviewed. Recent measurements of charmonium production in B decays and searches for B c will also be presented. (orig.)

  10. First Language Proficiency and Successful Foreign Language Learning: The Case of High School Students Learning French as a Foreign Language

    Science.gov (United States)

    Gnintedem, Antoine

    2014-01-01

    This study investigated whether there was a correlation between first language proficiency as measured by the Mississippi Curriculum Test (MCT II) Reading and Language Arts and foreign language proficiency as measured by the French Language Proficiency Test. Data for the independent variable, first language proficiency, was collected from the…

  11. Preparing Limited English Proficient Persons for the Workplace. ERIC Digest No. 215.

    Science.gov (United States)

    Wonacott, Michael E.

    This digest describes cultural considerations and effective approaches for limited English proficient (LEP) individuals' workforce development, including the impact of recent training legislation. LEP persons often come from both a different language background and a very different cultural background; so English-language instruction must provide…

  12. Drilling a borehole for LEP

    CERN Multimedia

    1981-01-01

    Boreholes were drilled along the earlier proposed line of the LEP tunnel under the Jura to find out the conditions likely to be encountered during the construction of the LEP tunnel (Annual Report 1981 p. 106, Fig. 10).

  13. Fast luminosity monitor at LEP

    International Nuclear Information System (INIS)

    Bini, C.; De Pedis, D.; De Zorzi, G.; Diambrini-Palazzi, G.; Di Cosimo, G.; Di Domenico, A.; Gauzzi, P.; Zanello, D.

    1994-01-01

    In 1990 the LEP-5 experiment measured luminosity at LEP by detecting the single bremsstrahlung photons emitted in the e + e - collisions. In 1991 the experiment was upgraded to exploit the intrinsic high speed of the method which allows luminosity measurement of the single bunches of LEP. In this paper the LEP-5 upgrade is described and the results of a test performed are discussed. ((orig.))

  14. submitter LEP W measurements

    CERN Document Server

    Saeki, Takayuki

    2001-01-01

    of pair-production of W bosons, and LEP2 experiments started. ALEPH, DELPHI, L3, and OPAL experiments observed the pair-production of W bosons for the first time in $e^{+}e^{-}$ collisions. Since then, the four experiments had been collecting data successfully at the energies of 161 - 209 GeV, and the data acquisition of LEP experiments was finished on 2nd November 2001. The total integrated luminosities amounted to about 710 pb$^{-1}$ per each experiment and about 46 k W-pair events were produced in total. In this article, the results on W physics in LEP2 are presented, which cover the total cross section of the W boson pair-production, the W decay branching fractions, the triple gauge-boson couplings and the mass of the W boson. All the results are consistent with the Standard Model expectations within the measurement errors.

  15. The effects of video games on the receptive vocabulary proficiency of Swedish ESL students

    OpenAIRE

    Cabraja, Andreas

    2016-01-01

    Playing video games is an activity that takes up an increasing amount of children’s and adolescent’s spare time. While some previous studies have highlighted the negative aspects of video games, little research has been carried out on the linguistic learning opportunities that video games present. This study primarily investigates if Swedish second language learners of English can increase their vocabulary proficiency in English with the use of video games. In order to answer the research que...

  16. Exotic searches at lep

    International Nuclear Information System (INIS)

    Seager, P.

    2001-01-01

    The search for exotic processes at LEP is presented. The Standard Model Higgs has as yet not been observed. This provides freedom to search for processes beyond the Standard Model and even beyond the minimal version of the supersymmetric extension to the Standard Model. This paper outlines the searches for charged Higgs bosons, fermiophobic Higgs bosons, invisibly decaying Higgs bosons, technicolor, leptoquarks, unstable heavy leptons and excited leptons. The results presented are those from the LEP collaborations using data taken up to a centre-of-mass energy of √s = 202 GeV. (author)

  17. Electroweak physics with LEP

    International Nuclear Information System (INIS)

    Davier, M.

    1992-03-01

    The present status of electroweak physics at LEP is presented. The LEP machine and the detectors are described. The decays of Z neutral bosons in both leptonic and hadronic channels are studied. Neutral and charged sector are investigated, and a precise test of the Standard Model is given. Higgs boson searches and τ decay measurements are also described as well as quark mixing and B 0 B-bar 0 oscillations. All the seven contributions are individually indexed and abstracted for the INIS database. (K.A.) 100 refs

  18. B physics at LEP

    International Nuclear Information System (INIS)

    Kowalewski, R.V.

    1993-01-01

    The experiments at LEP now dominate the world average b hadron lifetime, and have measured individual lifetimes for the pseudo-scalar B mesons and for b baryons with precisions of 15-20%. Measurements of the average mixing parameter [χ] at LEP suggest substantial B s mixing. Flavor oscillations have been observed directly for the B d , and searches for B s oscillations are underway. Some exclusive B decays have been reconstructed, and the mass of the B s has been measured. Most analyses are statistics limited, so further improvements can be expected as the data sample increases

  19. Physics at LEP

    International Nuclear Information System (INIS)

    Ellis, J.; Peccei, R.

    1986-01-01

    This report surveys physics which may be investigated at LEP, the Large Electron-Positron collider under construction at CERN. Five general areas are emphasized, namely: precision measurements at the Z 0 peak; studies of toponium; searches for possible new particles; QCD, γγ, and heavy quark studies; and experiments at the highest LEP energies up to and beyond the W + W - pair-production threshold. Wherever possible, full cross section formulae are given, together with references to the original literature where more details may be found. (orig.)

  20. LEP Dismantling: Wagons Roll!

    CERN Multimedia

    2001-01-01

    The first trucks transporting material from LEP and its four experiments left CERN on 31 January. Since the LEP dismantling operation began, the material had been waiting to be removed from the sites of the four experiments and the special transit area on the Prévessin site. On the evening of 30 January, the French customs authorities gave the green light for the transport operation to begin. So first thing the next day, the two companies in charge of recycling the material, Jaeger & Bosshard (Switzerland) and Excoffier (France), set to work. Only 1500 truckloads to go before everything has been removed!

  1. τ physics at LEP

    International Nuclear Information System (INIS)

    Dam, M.

    1992-05-01

    Untill the end of the 1991 data taking period, the four LEP experiments have collected about 80000 τ + τ - pairs. Many precise measurements of the production and decay properties of the τ lepton at the Z o resonance have been performed. Accurate measurements of the τ lifetime along with measurements of inclusive and exclusive branching ratios provide interesting consistency tests in τ decays. Measurements from LEP confirm nonzero values of the average polarization of the τ, starting to yield precise measurements of the weak mixing parameter sin 2 θ w . A test of CP invariance in τ + τ - production has been performed. 23 refs., 6 tabs

  2. On the Accuracy of Iranian EFL Students' Reading Self-assessment and their Level of Reading Proficiency

    Directory of Open Access Journals (Sweden)

    Moein Shokr

    2015-10-01

    Full Text Available Reviewing the literature on self-assessment as an alternative method of assessment we find advocates claiming for the accuracy of the students’ self-assessments in general with little focus on their level of proficiency. With an eye on the students’ level of reading proficiency, the present study aimed at investigating the relationship between students’ reading self-assessment (as a formative and alternative method of assessment on the one hand, and teacher assessment (as a formative type of assessment as well as students’ final examination scores (as a summative and traditional method of assessment on the other. To this end, 65 students of Islamic Azad University- Tehran South Branch were selected to participate in this study. Initially, participants received PET test as pretest for assigning them into different levels of reading proficiency. Based upon the results of the pretest, participants were assigned to elementary and intermediate levels. Throughout the whole semester self-assessment questionnaire was employed for five times. Descriptive statistics and Pearson correlation were the data analysis techniques performed. The results of the study revealed a significant relationship between the intermediate learners’ self-ratings and teacher assessments; however, the results indicated no significant relationship between elementary learners’ self-assessments and teacher assessments. Also, the correlations between students’ self-assessments and their final examination scores were not significant for both levels. Therefore, given the teacher assessment as the yardstick, the accuracy of the intermediate levels and the inaccuracy of the elementary learners’ self-assessments could be concluded. Finally, the low correlation between the learners’ self-assessments and their scores on traditional final examination led the researcher to attribute it to the different nature of these two assessment types.

  3. LEP vacuum chamber, prototype

    CERN Multimedia

    CERN PhotoLab

    1983-01-01

    Final prototype for the LEP vacuum chamber, see 8305170 for more details. Here we see the strips of the NEG pump, providing "distributed pumping". The strips are made from a Zr-Ti-Fe alloy. By passing an electrical current, they were heated to 700 deg C.

  4. Quark radiation from LEP

    International Nuclear Information System (INIS)

    Cartwright, Susan

    1992-01-01

    Like any other electrically charged particles, quarks should give out electromagnetic radiation (photons) when they vibrate. One of the physics results from CERN's LEP collider is the first clear observation of this quark radiation from electron-positron collisions. At lower energies this radiation could only be inferred

  5. A look at LEP

    International Nuclear Information System (INIS)

    Anon.

    1986-01-01

    While work on the tunnel linking England and France under the English Channel has not yet begun, the 26.6 kilometre ring being built at CERN for the LEP electron-positron collider is one of Europe's major engineering projects. (orig./HSI).

  6. LEP dismantling starts

    CERN Multimedia

    2000-01-01

    Since the end of November, various teams have been getting stuck into dismantling the LEP accelerator and its four experiments. After making the installations safe, the dismantling and removal of 40,000 tonnes of equipment is underway. Down in the tunnel, it is a solemn moment. It is 10 o'clock on 13 December and Daniel Regin, one of those heading the dismantling work, moves in on a magnet, armed with a hydraulic machine. Surrounded by teams gathered there for a course in dismantling, he makes the first cut into LEP. The great deconstruction has begun. In little over than a year, the accelerator will have been cleared away to make room for its successor, the LHC. The start of the operation goes back to 27 November. Because before setting about the machine with hydraulic shears and monkey wrenches, LEP had first to be made safe - it was important to make sure the machine could be taken apart without risk. All the SPS beam injection systems to LEP were cut off. The fluids used for cooling the magnets and superc...

  7. LEP Vacuum Chamber

    CERN Multimedia

    1983-01-01

    This is a cut-out of a LEP vacuum chamber for dipole magnets showing the beam channel and the pumping channel with the getter (NEG) strip and its insulating supports. A water pipe connected to the cooling channel can also be seen at the back.The lead radiation shield lining is also shown. See also 8305563X.

  8. Quark radiation from LEP

    Energy Technology Data Exchange (ETDEWEB)

    Cartwright, Susan

    1992-04-15

    Like any other electrically charged particles, quarks should give out electromagnetic radiation (photons) when they vibrate. One of the physics results from CERN's LEP collider is the first clear observation of this quark radiation from electron-positron collisions. At lower energies this radiation could only be inferred.

  9. The LEP program

    International Nuclear Information System (INIS)

    Allaby, J.V.

    1986-01-01

    Details of the LEP program are discussed in this paper. LEP is an electron-positron collider 26 kms in circumference. At present, four interaction regions are to be equipped with experiments, although there is the potential for eight crossing points with four-bunch operation. Before reviewing the experiments, some basic facts about LEP are recalled. The collider is located underground between the outskirts of Geneva and the Jura mountains. The major part of the tunnel in which LEP will be installed will be bored by machine in the ''molasse'' (a kind of sandstone) that lies at depths of several tens of meters below the surface of the ground in this region, which is formed of glacial moraine. However, about one-eighth of the circumference lies under the foothills of the Jura and here the tunnel must pass through the limestone rock where a boring machine cannot be used. Since the surface of the ground is itself not flat over this huge area, the plane of the machine is not horizontal, but slightly inclined to minimize the distance from the surface to the interaction regions; hence, the cost of the access shafts

  10. Experimentation at LEP

    International Nuclear Information System (INIS)

    Wiik, B.H.

    1979-01-01

    Some of the more basic processes in e + e - annihilation are discussed and the rates estimated. The following topics are treated: 1. Estimate of e + e - → hadrons. 2. Strong Interaction Issues. 3. Weak Interaction Issues. 4. The Higgs Particle(s). The contribution of experiments at LEP energies is assessed. (Auth.)

  11. QCD at LEP

    CERN Document Server

    Metzger, W.J.

    2003-01-01

    Several preliminary QCD results from e+e- interactions at LEP are reported. These include studies of event shape variables, which are used to determine alpha_s and for studies of the validity of power corrections. Further, a study of color reconnection effects in 3-jet Z decays is reported.

  12. Teachers' perceptions of students' mathematics proficiency may exacerbate early gender gaps in achievement.

    Science.gov (United States)

    Robinson-Cimpian, Joseph P; Lubienski, Sarah Theule; Ganley, Colleen M; Copur-Gencturk, Yasemin

    2014-04-01

    A recent wave of research suggests that teachers overrate the performance of girls relative to boys and hold more positive attitudes toward girls' mathematics abilities. However, these prior estimates of teachers' supposed female bias are potentially misleading because these estimates (and teachers themselves) confound achievement with teachers' perceptions of behavior and effort. Using data from the Early Childhood Longitudinal Study, Kindergarten Class of 1998-1999 (ECLS-K), Study 1 demonstrates that teachers actually rate boys' mathematics proficiency higher than that of girls when conditioning on both teachers' ratings of behavior and approaches to learning as well as past and current test scores. In other words, on average girls are only perceived to be as mathematically competent as similarly achieving boys when the girls are also seen as working harder, behaving better, and being more eager to learn. Study 2 uses mediation analysis with an instrumental-variables approach, as well as a matching strategy, to explore the extent to which this conditional underrating of girls may explain the widening gender gap in mathematics in early elementary school. We find robust evidence suggesting that underrating girls' mathematics proficiency accounts for a substantial portion of the development of the mathematics achievement gap between similarly performing and behaving boys and girls in the early grades. PsycINFO Database Record (c) 2014 APA, all rights reserved.

  13. English Language Proficiency and Test Performance: An Evaluation of Bilingual Students with the Woodcock-Johnson III Tests of Cognitive Abilities

    Science.gov (United States)

    Sotelo-Dynega, Marlene; Ortiz, Samuel O.; Flanagan, Dawn P.; Chaplin, William F.

    2013-01-01

    In this article, we report the findings of an exploratory empirical study that investigated the relationship between English Language Proficiency (ELP) on performance on the Woodcock-Johnson Tests of Cognitive Abilities-Third Edition (WJ III) when administered in English to bilingual students of varying levels of ELP. Sixty-one second-grade…

  14. Relationships among video gaming proficiency and spatial orientation, laparoscopic, and traditional surgical skills of third-year veterinary students.

    Science.gov (United States)

    Millard, Heather A Towle; Millard, Ralph P; Constable, Peter D; Freeman, Lyn J

    2014-02-01

    To determine the relationships among traditional and laparoscopic surgical skills, spatial analysis skills, and video gaming proficiency of third-year veterinary students. Prospective, randomized, controlled study. A convenience sample of 29 third-year veterinary students. The students had completed basic surgical skills training with inanimate objects but had no experience with soft tissue, orthopedic, or laparoscopic surgery; the spatial analysis test; or the video games that were used in the study. Scores for traditional surgical, laparoscopic, spatial analysis, and video gaming skills were determined, and associations among these were analyzed by means of Spearman's rank order correlation coefficient (rs). A significant positive association (rs = 0.40) was detected between summary scores for video game performance and laparoscopic skills, but not between video game performance and traditional surgical skills scores. Spatial analysis scores were positively (rs = 0.30) associated with video game performance scores; however, that result was not significant. Spatial analysis scores were not significantly associated with laparoscopic surgical skills scores. Traditional surgical skills scores were not significantly associated with laparoscopic skills or spatial analysis scores. Results of this study indicated video game performance of third-year veterinary students was predictive of laparoscopic but not traditional surgical skills, suggesting that laparoscopic performance may be improved with video gaming experience. Additional studies would be required to identify methods for improvement of traditional surgical skills.

  15. Precision Experiments at LEP

    CERN Document Server

    de Boer, Wim

    2015-01-01

    The Large Electron Positron Collider (LEP) established the Standard Model (SM) of particle physics with unprecedented precision, including all its radiative corrections. These led to predictions for the masses of the top quark and Higgs boson, which were beautifully confirmed later on. After these precision measurements the Nobel Prize in Physics was awarded in 1999 jointly to 't Hooft and Veltman "for elucidating the quantum structure of electroweak interactions in physics". Another hallmark of the LEP results were the precise measurements of the gauge coupling constants, which excluded unification of the forces within the SM, but allowed unification within the supersymmetric extension of the SM. This increased the interest in Supersymmetry (SUSY) and Grand Unified Theories, especially since the SM has no candidate for the elusive dark matter, while Supersymmetry provides an excellent candidate for dark matter. In addition, Supersymmetry removes the quadratic divergencies of the SM and {\\it predicts} the Hig...

  16. accelerating cavity from LEP

    CERN Multimedia

    This is an accelerating cavity from LEP, with a layer of niobium on the inside. Operating at 4.2 degrees above absolute zero, the niobium is superconducting and carries an accelerating field of 6 million volts per metre with negligible losses. Each cavity has a surface of 6 m2. The niobium layer is only 1.2 microns thick, ten times thinner than a hair. Such a large area had never been coated to such a high accuracy. A speck of dust could ruin the performance of the whole cavity so the work had to be done in an extremely clean environment. These challenging requirements pushed European industry to new achievements. 256 of these cavities are now used in LEP to double the energy of the particle beams.

  17. The LEP alarm system

    International Nuclear Information System (INIS)

    Tyrrell, M.W.

    1992-01-01

    Unlike alarm systems for previous accelerators, the LEP alarm system caters not only for the operation of the accelerator but also for technical services and provides the direct channel for personnel safety. It was commissioned during 1989 and has seen a continued development up to the present day. The system, comprising over 50 computers including 5 different platforms and 4 different operating systems, is described. The hierarchical structure of the software is outlined from the interface to the equipment groups, through the front end computers to the central server, and finally to the operator consoles. Reasons are given for choosing a conventional, as opposed to a 'knowledge based' approach. Finally, references are made to a prototype real time expert system for surveying the power converters of LEP, which was conducted during 1990 as part of the alarm development program. (author)

  18. Compositeness at LEP

    International Nuclear Information System (INIS)

    Bardadin-Otwinowska, M.

    1992-01-01

    Searches for compositeness made by four LEP collaborations are reported. Limits are set on excited fermion masses and couplings. A limit on the branching ratio Z→γγγ is determined. Four-fermion and two-fermion, two-boson contact terms are studied in the reactions e + e - →l + l - and e + e - →γγ respectively and limits are obtained on the energy scale of a new interaction

  19. The LEP impedance model

    Energy Technology Data Exchange (ETDEWEB)

    Zotter, B [European Organization for Nuclear Research, Geneva (Switzerland)

    1996-08-01

    This report describes a number of measurements and computations of the impedance of the Large Electron Positron collider LEP at CERN. The work has been performed over several years, together with D. Brandt, K. Cornelis, A. Hofmann, G. Sabbi and many others. The agreement between measurements of single bunch instabilities on the machine and computer simulations is in general excellent and gives confidence in the impedance model used. (author)

  20. LEP copper accelerating cavities

    CERN Multimedia

    Laurent Guiraud

    1999-01-01

    These copper cavities were used to generate the radio frequency electric field that was used to accelerate electrons and positrons around the 27-km Large Electron-Positron (LEP) collider at CERN, which ran from 1989 to 2000. The copper cavities were gradually replaced from 1996 with new superconducting cavities allowing the collision energy to rise from 90 GeV to 200 GeV by mid-1999.

  1. LEP at 90°

    Energy Technology Data Exchange (ETDEWEB)

    Anon.

    1993-01-15

    With twice as many Z particles logged this year, the performance of CERN's LEP electron-positron collider continues to improve. Paradoxically, the improvement would have been even better had it not been for teething problems with new operating conditions which will eventually boost performance still higher. Now solidly established, these new conditions, notably the 90° (instead of the previous 60°) phase for transverse betatron oscillations, and the 'pretzel' scheme for eight bunches per beam instead of four (October, page 17), first had to be assimilated, and it took a few weeks before the LEP operating crews could add them to their full repertoire. Collision performance (measured by 'luminosity') continues to improve. Although in principle LEP has yet to deliver its 'design' luminosity of 1.3 x 10{sup 31} per sq cm per s at any one time, its best performance to date is not far off - 1.1 x 10{sup 31}. The crews have become very skilled at optimizing conditions during each beam coast, with continual careful grooming of the beams ensuring high collision rates. This, together with improved performance at the four detectors - Aleph, Delphi, L3, and Opal - have led to average efficiency increasing to 57% from 44% in 1991, so that the luminosity delivered over a day has exceeded what could have been expected initially, says Steve Myers.

  2. LEP at 90°

    International Nuclear Information System (INIS)

    Anon.

    1993-01-01

    With twice as many Z particles logged this year, the performance of CERN's LEP electron-positron collider continues to improve. Paradoxically, the improvement would have been even better had it not been for teething problems with new operating conditions which will eventually boost performance still higher. Now solidly established, these new conditions, notably the 90° (instead of the previous 60°) phase for transverse betatron oscillations, and the 'pretzel' scheme for eight bunches per beam instead of four (October, page 17), first had to be assimilated, and it took a few weeks before the LEP operating crews could add them to their full repertoire. Collision performance (measured by 'luminosity') continues to improve. Although in principle LEP has yet to deliver its 'design' luminosity of 1.3 x 10 31 per sq cm per s at any one time, its best performance to date is not far off - 1.1 x 10 31 . The crews have become very skilled at optimizing conditions during each beam coast, with continual careful grooming of the beams ensuring high collision rates. This, together with improved performance at the four detectors - Aleph, Delphi, L3, and Opal - have led to average efficiency increasing to 57% from 44% in 1991, so that the luminosity delivered over a day has exceeded what could have been expected initially, says Steve Myers

  3. UX-15 Reaches LEP

    CERN Multimedia

    2001-01-01

    The creation of the world's largest sandstone cavern, not a small feat! At the bottom, cave-in preventing steel mesh can be seen clinging to the top of the tunnel. The digging of UX-15, the cavern that will house ATLAS, reached the upper ceiling of LEP on October 10th. The breakthrough which took place nearly 100 metres underground occurred precisely on schedule and exactly as planned. But much caution was taken beforehand to make the LEP breakthrough clean and safe. To prevent the possibility of cave-ins in the side tunnels that will eventually be attached to the completed UX-15 cavern, reinforcing steel mesh was fixed into the walls with bolts. Obviously no people were allowed in the LEP tunnels below UX-15 as the breakthrough occurred. The area was completely evacuated and fences were put into place to keep all personnel out. However, while personnel were being kept out of the tunnels below, this has been anything but the case for the work taking place up above. With the creation of the world's largest...

  4. Multiplicities and Correlations at LEP

    International Nuclear Information System (INIS)

    Sarkisyan, E.K.G.

    2002-01-01

    A brief review on recent charge multiplicity and correlation measurements at LEP is given. The measurements of un biased gluon jet multiplicity are discussed. Recent results on charged particle Bose-Einstein and Fermi-Dirac correlations at LEP1 are reported. New results on two-particle correlations of neutral pions are given. Correlations of more than two particles (high-order correlations) obtained using different methods are performed. Recent Bose-Einstein correlation measurements at LEP2 are discussed. (author)

  5. Multiplicities and correlations at LEP

    CERN Document Server

    Sarkisyan-Grinbaum, E

    2002-01-01

    A brief review on recent charge multiplicity and correlation measurements at LEP is given. The measurements of unbiased gluon jet multiplicity are discussed. Recent results on charged particle Bose- Einstein and Fermi-Dirac correlations at LEP1. are reported. New results on two-particle correlations of neutral pions are given. Correlations of more than two particles (high-order correlations) obtained using different methods are performed. Recent Bose-Einstein correlation measurements at LEP2 are discussed. (13 refs).

  6. Observed Hierarchy of Student Proficiency with Period, Frequency, and Angular Frequency

    Science.gov (United States)

    Young, Nicholas T.; Heckler, Andrew F.

    2018-01-01

    In the context of a generic harmonic oscillator, we investigated students' accuracy in determining the period, frequency, and angular frequency from mathematical and graphical representations. In a series of studies including interviews, free response tests, and multiple-choice tests developed in an iterative process, we assessed students in both…

  7. A High School Turnaround School Initiative: Effects on Students' Math and Reading Proficiency

    Science.gov (United States)

    Segler Zender, Rene'

    2013-01-01

    Since the middle of the last century, student education in the U.S. public school systems has been deemed inadequate. Critics developed measures in the form of standardized testing to measure student progress in an attempt to help facilitate reforms. In the last thirty years, the federal government has played an increasing role in school reform…

  8. Deformation analysis of LEP

    International Nuclear Information System (INIS)

    Jin, F.; Mayoud, M.; Quesnel, J.P.

    1999-01-01

    LEP (Large Electron Positron Collider) is in an underground accelerator, located in a tunnel of 27 km circumference and from 40 to 160 m deep. It is the largest accelerator in the world. The electrons and positrons circulate in opposite directions and hit each other in four points. The collisions are observed by means of detectors, housed in large underground caverns. Due to the sensitivity of such accelerators to alignment errors a complete leveling is made every year, followed by a 'smoothing' process - i.e. an optimal refinement of successive positions - which makes that the accelerator is kept operational with respect to misalignments. The annual leveling of LEP can be characterised as follows: - A quasi circle of 27 km circumference in tunnel; - Measurements with a LEICA NA3000 (σ = ± 0.4 mm/km, statistically ± 0.04 to ± 0.05 mm/station, at intervals of 39.5 m); - Maximum height difference of 120 m between the highest point and the lowest point; - Measured points: alignment reference targets of the quadrupole magnets (entrance and exit points); -800 quadrupole magnets, 1600 points to measure; - Cholesky method, with two independent traverses (forward/backward loops). The data processing is made by least squares, according to a free network concept. In addition, a smoothing procedure (successive fits within a sliding window) is also carried out after each annual leveling measurement, in the purpose of refining the successive positions and finding the points being vertically too far (more than 0.3 mm in general) from the local smoothing curve. These points are then brought physically on their smoothed position (realignment) in order to keep the vertical configuration of LEP as optimal as possible. Tilt (transverse slope) measurements are also taken during this realignment process, thus putting the corrected element back to its right transverse position and reducing the correlated radial movement associated to this defect. (authors)

  9. Logistics of LEP installation

    International Nuclear Information System (INIS)

    Genier, C.; Capper, S.

    1988-01-01

    The size of the LEP project, coupled with the tight construction schedules, calls for organized planning, logistics, monitoring and control. This is being carried out at present using tools such as ORACLE the Relational Database Management System, running on a VAX cluster for data storage and transfer, micro-computers for on-site follow-up, and PC's running Professional ORACLE, DOS and XENIX linked to a communications network to receive data feedback concerning transport and handling means. Following over 2 years of installations, this paper presents the methods used for the logistics of installation and their results

  10. Particle Correlations at LEP

    CERN Document Server

    Kress, Thomas

    2002-01-01

    Particle correlations are extensively studied to obtain information about the dynamics of hadron production. From 1989 to 2000 the four LEP collaborations recorded more than 16 million hadronic Z0 decays and several thousand W+W- events. In Z0 decays, two-particle correlations were analysed in detail to study Bose-Einstein and Fermi-Dirac correlations for various particle species. In fully-hadronic W+W- decays, particle correlations were used to study whether the two W bosons decay independently. A review of selected results is presented.

  11. The LEP project

    International Nuclear Information System (INIS)

    Picasso, E.

    1988-01-01

    This paper reports on the present state of installation of utilities (electricity, cooling, ventilation, access equipment, lifts, travelling cranes, emergency exits, etc.) and machine components, closely followed the installation schedule. The controls and the beam instrumentation systems of LEP are being mounted and tested. It is in fact foreseen that the installation of 7 out of 8 octants will be completed at the beginning of next year and the last octant (under the Jura) required an accelerated installation program. The installation of the machine is under way simultaneously in at least three quarters of the ring

  12. Jet physics at LEP

    International Nuclear Information System (INIS)

    Venus, W.

    1991-01-01

    The results of studies of the jet structure of hadronic Z 0 decays performed in the first year of Large Electron-Positron collider (LEP) operation are reviewed. The measurements of the quantum chromodynamics (QCD) coupling constant α s (M z )and the detection of the presence of the triple gluon vertex are summarized. After a brief review of the promising status of QCD in relation to even the very soft processes, the running of the coupling constants to high energy is considered in the context of grand unified theories. The necessity and importance of further theoretical work is stressed. (author)

  13. Raising the last LEP dipole

    CERN Multimedia

    Maximilien Brice

    2002-01-01

    The last of the 3280 dipole magnets from the Large Electron-Positron (LEP) collider is seen on its journey to the surface on 12 February 2002. The LEP era, which began at CERN in 1989 and ended 2000, comes to an end.

  14. Scenarios for physics at LEP

    International Nuclear Information System (INIS)

    Glashow, S.L.

    1979-01-01

    The author states his views regarding the importance of the experiments made possible if LEP is built. The main contribution of the LEP will be to understanding the physics of leptons, quarks and quantum chromodynamics. The author suggests the directions in which the new results might lead. (W.D.L.)

  15. Drama Performance: Its Impacts on Students'Proficiency in the EFL Outside the Classroom Setting

    Directory of Open Access Journals (Sweden)

    I Ketut Warta

    2002-01-01

    Full Text Available Abstract: Disability to function in oral and written English has been serious problems among students in higher education learning. This study is an attempt made to find out possible solutions to such problems through drama performance. The study is experimental in which subjects of different groups in the study were provided with different treatments. Data analysis show that students' performance level developed from basic to intermediate, from being marginal user to modest.

  16. ROPES Learning Model Modification to Increase Proficiency Students of Rational Thingking

    OpenAIRE

    Nizaruddin

    2010-01-01

    Mathematics teachers should have the ability mathematics, mathematical methodology skills, and ability to package the science and methodology of mathematics is a subject matter learning in school. To achieve mathematical skills that students should be equipped with skills of deductive thinking, rational, analytical, and creative. These skills are necessary for students so that they have the skills in understanding and problem-solving perspective to the prospective teacher / mathematics teache...

  17. A proficient and versatile online student-teacher collaboration platform for large classroom lectures

    Directory of Open Access Journals (Sweden)

    ABM Tariqul Islam

    2017-11-01

    Full Text Available Abstract The popularity of online collaboration on lecture content has been growing steadily over the last few decades because of its potential to enhance the overall learning experience. We propose a didactical approach of online collaboration where the students and the teachers can collaborate seamlessly on the lecture contents. The approach, which we call Multiscript (MS, offers two methods of online learning on one collaboration platform. In MS, we call one method the outside of class Multiscript (OMS and another, the inside of class Multiscript (IMS. OMS is a form of distance online learning where the students can collaborate on the lecture contents while being outside of class, whereas IMS allows online collaboration among the students and the teacher during the lecture. In OMS, the teacher can share the slides along with audio annotations for each lecture slides and/or a single recorded audio for the whole lecture. The students can access the slides and discuss (via text and audio chat with their fellow classmates about the slides and annotate them, post feedback about the slides and ask questions to the teacher directly via MS. In IMS, the students can create annotations for the slides and post feedback to the teacher about the slides. We design MS in such a way that it can be accessed by using just a web browser on any PC, tablet or mobile device.

  18. Outdoor Class Project: The Potential Benefits to Foster EFL Students' Language Proficiency

    Science.gov (United States)

    Fajaria, Indah

    2013-01-01

    There are such myriad ideas upon English teaching-learning process. Everybody can share each fabulous idea through various media. One of fun English learnings that can motivate EFL students' eagerness to practice English easily is an outdoor class activity. This project could sometimes deals with an outbound activities which provide the numerous…

  19. The Correlation between Temperament, Technology Preference, and Proficiency in Middle School Students

    Science.gov (United States)

    Colvin-Sterling, Sabrina

    2016-01-01

    This study examined the relationship between middle school students' personality type and their academic performance in the technology courses in which they participated. It also explored the differences in technology use by personality. Most participants identified games as a favorite pas-time. However, there were some noted temperamental…

  20. The Effects of a Communicative Approach on the Mathematical Problem Solving Proficiency of Language Minority Students.

    Science.gov (United States)

    Kaplan, Rochelle G.; Patino, Rodrigo A.

    Although it takes only 2 years to attain conversational competence in a second language, it takes up to 7 years to realize sufficient language competence to achieve academically at the level of native speakers. Specific adaptations in instructional methods in mathematics for language minority students should include techniques from English as a…

  1. Workshops Increase Students' Proficiency at Identifying General and APA-Style Writing Errors

    Science.gov (United States)

    Jorgensen, Terrence D.; Marek, Pam

    2013-01-01

    To determine the effectiveness of 20- to 30-min workshops on recognition of errors in American Psychological Association-style writing, 58 introductory psychology students attended one of the three workshops (on grammar, mechanics, or references) and completed error recognition tests (pretest, initial posttest, and three follow-up tests). As a…

  2. Intensive skills week for military medical students increases technical proficiency, confidence, and skills to minimize negative stress.

    Science.gov (United States)

    Mueller, Genevieve; Hunt, Bonnie; Wall, Van; Rush, Robert; Molof, Alan; Schoeff, Jonathan; Wedmore, Ian; Schmid, James; Laporta, Anthony

    2012-01-01

    The effects of stress induced cortisol on learning and memory is well documented in the literature.1-3 Memory and learning are enhanced at low levels while high levels are detrimental. Repetitive training in stressful situations enables management of the stress response4 as demonstrated by the high intensity training military members undergo to prepare for tactical situations. Appropriate management of one?s stress response is critical in the medical field, as the negative effects of stress can potentially hinder life-saving procedures and treatments. This also applies to physicians-in-training as they learn and practice triage, emergency medicine, and surgical skills prior to graduation. Rocky Vista University?s Military Medicine Honor?s Track (MMHT) held a week long high-intensity emergency medicine and surgical Intensive Skills Week (ISW), facilitated by military and university physicians, to advance students? skills and maximize training using the Human Worn Partial Surgical Task Simulator (Cut Suit). The short-term goal of the ISW was to overcome negative stress responses to increase confidence, technical and non-technical knowledge, and skill in surgery and emergency medicine in an effort to improve performance as third-year medical students. The long-term goal was to enhance performance and proficiency in residency and future medical practice. The metrics for the short-term goals were the focus of this pilot study. Results show an increase in confidence and decrease in perceived stress as well as statistically significant improvements in technical and non-technical skills and surgical instrumentation knowledge throughout the week. There is a correlative benefit to physician and non-physician military personnel, especially Special Operations Forces (SOF) medical personnel, from developing and implementing similar training programs when live tissue or cadaver models are unavailable or unfeasible. 2012.

  3. Electroweak interactions at LEP

    International Nuclear Information System (INIS)

    Borgia, B.

    1991-01-01

    Electroweak interaction at LEP are a subject based on a wealth of data, given the success of the CERN e + e - storage ring. The author will report on the results from the four experiments, ALEPH, DELPHI, L3 and OPAL after the analysis of about 1/2 of the data collected in 1989 and 1990. The review will cover the electroweak aspects of the process e + e - → Z* → f bar f where the fermions can be either quarks or leptons. The analysis of experimental data is based on the determination of the cross section integrated on the solid angle and on the asymmetry of forward-backward leptons in the final state. In this game the knowledge of the center mass energy is fundamental as the determination of the luminosity by which the event rate is normalized to compute the absolute cross section. Therefore a specific attention is given to these subjects

  4. Searches at LEP

    CERN Document Server

    Junk, Tom

    2000-01-01

    Searches have been conducted for a broad range of new phenomena by the four experiments ALEPH, DELPHI, L3, and OPAL, at LEP2. Each experiment contributes approximately 150 pb-1 of e+e- annihilation data with a mean sqrt(s) of 205.9 GeV in 2000 to these searches (data prepared for the September 5 LEPC meeting). The statistical procedure for setting limits and evaluating the significance of excesses observed in the data is reviewed. Search results are presented for the Standard Model Higgs boson, the neutral Higgs bosons in the MSSM, charged Higgs bosons, invisibly decaying Higgs bosons produced by Higgs-strahlung, and fermiophobic Higgs bosons. Search results are briefly summarized for gauginos, stops, and staus. The photon recoil spectrum is checked for hints of new physics.

  5. The LEP project

    International Nuclear Information System (INIS)

    Anon.

    1980-01-01

    At its 64th Session on 19-20 December, the CERN Council received a document from its Scientific Policy Committee entitled 'Proposal for the next major accelerator project at CERN'. Following the studies which have been carried out over the past few years, the SPC recommended that the 'Design Study of a 22 to 130 GeV electronpositron colliding beam machine (LEP)' should be used as the basis for planning the next accelerator for CERN and recommended that the accelerator should be built adjacent to the existing Laboratory.These recommendations were mostly favourably received by the delegates of the CERN Member States and the stage seems set for the formal presentation of the project in June of this year

  6. Results from LEP

    International Nuclear Information System (INIS)

    Pohl, M.

    1995-01-01

    Selected results from LEP on electroweak neutral currents and strong interactions are reviewed. In the first part, total cross sections, angular and polarization symmetries are interpreted in terms of basic electroweak parameters, like the mass, total and partial widths of the Z and neutral current couplings. Special attention is given to two apparent problems: the discrepancy between the measurements with final state vs. initial state polarization; and the deviation of the measured width of the Z into heavy quarks from Standard Model expectations. These discrepancies are not very significant, but they are the only ones observed at this point and thus deserve attention. In the second part, I outline results on final state strong interactions, namely measurements pertaining to differences between quark and gluon jets and the QCD group structure. (author) 19 figs., 4 tabs., 21 refs

  7. PixEye Virtual Reality Training has the Potential of Enhancing Proficiency of Laser Trabeculoplasty Performed by Medical Students: A Pilot Study.

    Science.gov (United States)

    Alwadani, Fahad; Morsi, Mohammed Saad

    2012-01-01

    To compare the surgical proficiency of medical students who underwent traditional training or virtual reality training for argon laser trabeculoplasty with the PixEye simulator. The cohort comprised of 47 fifth year male medical students from the College of Medicine, King Faisal University, Saudi Arabia. The cohort was divided into two groups: students (n = 24), who received virtual reality training (VR Group) and students (n = 23), who underwent traditional training (Control Group). After training, the students performed the trabeculoplasty procedure. All trainings were included concurrent power point presentations describing the details of the procedure. Evaluation of surgical performance was based on the following variables: missing the exact location with the laser, overtreatment, undertreatment and inadvertent laser shots to iris and cornea. The target was missed by 8% of the VR Group compared to 55% in the Control Group. Overtreatment and undertreatment was observed in 7% of the VR Group compared to 46% of the Control Group. Inadvertent laser application to the cornea or iris was performed by 4.5% of the VR Group compared to 34% of the Control Group. Virtual reality training on PixEye simulator may enhance the proficiency of medical students and limit possible surgical errors during laser trabeculoplasty. The authors have no financial interest in the material mentioned in this study.

  8. LEP dominates LP-HEP

    Energy Technology Data Exchange (ETDEWEB)

    Fraser, Gordon

    1991-09-15

    CERN's LEP electron-positron collider was the star of this year's major physics meeting - the Joint International Lepton-Photon Symposium and Europhysics Conference on High Energy Physics (LP-HEP) - held in Geneva from 25 July - 1 August.

  9. Precision electroweak physics at LEP

    Energy Technology Data Exchange (ETDEWEB)

    Mannelli, M.

    1994-12-01

    Copious event statistics, a precise understanding of the LEP energy scale, and a favorable experimental situation at the Z{sup 0} resonance have allowed the LEP experiments to provide both dramatic confirmation of the Standard Model of strong and electroweak interactions and to place substantially improved constraints on the parameters of the model. The author concentrates on those measurements relevant to the electroweak sector. It will be seen that the precision of these measurements probes sensitively the structure of the Standard Model at the one-loop level, where the calculation of the observables measured at LEP is affected by the value chosen for the top quark mass. One finds that the LEP measurements are consistent with the Standard Model, but only if the mass of the top quark is measured to be within a restricted range of about 20 GeV.

  10. Soft gluon coherence at LEP

    International Nuclear Information System (INIS)

    Gaidot, A.

    1993-01-01

    After a brief overview of the experimental status on colour coherence at LEP we will focus on two recent approaches to the subject: the sub-jet multiplicities and the azimuthal correlations between pair of particles. (author)

  11. LEP takes to the hills

    International Nuclear Information System (INIS)

    Anon.

    1981-01-01

    From 1-7 June the focal point of thinking about the European project for a very high energy electron-positron machine, LEP, moved up into the Swiss mountains. The European Committee for Future Accelerators, ECFA, organized a 'General Meeting on LEP' at the alpine resort of Villars. This was in the long tradition of ECFA meetings which try to ensure a broad consultation of the European High Energy Physics community before major decisions on CERN projects are taken. Over 400 physicists gathered at the Palace Hotel where they were very agreeably immersed in the happy Club Mediterranee ambience. The Conference was successful beyond expectation and left the feeling that the contacts and discussions had moved LEP significantly further towards its goals. Above all it demonstrated again the keenness of the community to become involved in the experimental programme of LEP and the great belief in the scientific promise of the machine

  12. Rare B decays at LEP

    CERN Document Server

    Kluit, P M

    2001-01-01

    The results of the LEP experiments for rare B decays will be reviewed, covering hadronic final states, radiative and other rare decays and results for the inclusive charmless branching ratio. (8 refs).

  13. 4-jet events at LEP

    CERN Document Server

    Bizouard, M A

    1997-01-01

    Results of a special study made by the four LEP experiments on 4-jet events recorded at Vs = 130 - 136 , 161 and 172 GeV are related. This study concerns the ALEPH analysis which has shown an excess of 4-jet events in data recorded at Vs = 130 - 136 GeV. No significant evidence has been found by the 3 other experiments. Results have been combined after several checks which did not show differences of performance between the four LEP experiments.

  14. Electroweak physics at LEP2

    CERN Document Server

    Hemingway, Richard J

    2002-01-01

    On 2 November 2000 the LEP machine was finally closed after 12 years of glorious running. With the 4 operating detectors, ALEPH, DELPHI, L3, and OPAL, an enormous wealth of new data at the highest centre- of-mass energies has been recorded. These lectures will focus on aspects of electroweak physics within the energy span of LEP2, namely 130-209 GeV. All current data are in very good agreement with the electroweak standard model. (50 refs).

  15. Colour Reconnection at LEP2

    CERN Document Server

    Nandakumar, Raja

    2001-01-01

    Colour reconnection is the final state interaction between quarks from different sources. It is not yet fully understood and is a source of systematic error for W-boson mass and width measurements in hadronic \\WW decays at LEP2. The methods of measuring this effect and the results of the 4 LEP experiments at $183\\gev\\leq\\rts\\leq 202\\gev$ will be presented.

  16. Students with Non-Proficient Information Seeking Skills Greatly Over-Estimate Their Abilities. A Review of: Gross, Melissa, and Don Latham.

    Directory of Open Access Journals (Sweden)

    David Herron

    2008-06-01

    Full Text Available Objective – The objective of this study is an investigation of the relationship between students’ self-assessment of their information literacy skills and their actual skill level, as well as an analysis of whether library anxiety is related to information skill attainment. Design – Quantitative research design (Information Literacy Test (ILT, Library Anxiety Scale (LAS, pre and post surveys.Setting – Florida State University, United States.Subjects – Students, incoming freshmen.Methods – Information literacy skills were measured using the Information Literacy Test (ILT, presenting subjects with 65 multiple choice items designed around four of the five ACRL information literacy standards, in which students were expectedto: 1 determine the nature and extent of the information needed; 2 access needed information effectively and efficiently; 3 evaluate information and its sources critically and incorporates selected information into his/her knowledge base system; 4 understand many of the economic, legal and social issues surrounding the use of information and accesses and uses information ethically and legally. The ILT categorized participant scores as non-proficient(Main Results – The main aim of the study was to test the hypothesis that students who test non-proficient on an information literacy test tend to overestimate their competency to a higher degree than proficient and advanced students. In the pre- and post-surveys, the students were asked to estimate their performance onthe ILT in terms of the expected percentage of questions they would answer correctly, the number of questions they expected to answer correctly, and how their performance on the ILT would compare toothers taking the test (in percentage. The results of the study show that all students overestimate their abilities, both in terms of performance and relative performance, in the pre-survey. The estimated percentage correct answers for the whole group was 75%, but

  17. The impact of simulation-based learning on students' English for Nursing Purposes (ENP) reading proficiency: a quasi-experimental study.

    Science.gov (United States)

    Chang, Hsiao-Yun Annie; Chan, Luke; Siren, Betty

    2013-06-01

    This is a report of a study which evaluated simulation-based learning as a teaching strategy for improving participants' ENP reading proficiency in the senior college program of students whose first language is Chinese, not English. Simulation-based learning is known to be one of most effective teaching strategies in the healthcare professional curricula, which brings a clinical setting into the classroom. However, developing English reading skills for English written nursing journals through simulation-based learning in the nursing curricula, is largely unknown. We used a quasi-experimental approach with nonequivalent control group design to collect the causal connections between intervention and outcomes. 101 students were enrolled in this study (response rate 92.6%) of these 48 students volunteered for the intervention group, and 53 students for the control group. The findings indicated that the intervention group had significantly higher mean scores in ENP reading proficiency with unknown words in the article (p=.004), vocabulary (pdesigned research and a universal method of outcome measurement. Copyright © 2012 Elsevier Ltd. All rights reserved.

  18. Increasing Language Awareness and Self-Efficacy of FL Students Using Self-Assessment and the ACTFL Proficiency Guidelines

    Science.gov (United States)

    Kissling, Elizabeth M.; O'Donnell, Mary E.

    2015-01-01

    This study describes how oral language was assessed in an advanced-level college foreign language (FL) conversation course. Learners used the American Council on the Teaching of Foreign Languages Proficiency Guidelines to guide self-analyses of their oral production at intervals throughout the course. The intent was to provide opportunities for…

  19. Popular Culture, English Out-of-Class Activities, and Learner Autonomy among Highly Proficient Secondary Students in Hong Kong

    Science.gov (United States)

    Chan, Hoi Wing

    2016-01-01

    This paper reports on how and why proficient learners of English in Hong Kong participated in popular culture, out-of-class activities, with an emphasis on their development of learner autonomy. Autonomy in language learning is defined as an individual's ability and responsibility to take charge of his or her own learning [1]. Out-of-class…

  20. Assessing Proficiencies in Higher Education: Benchmarking Knowledge and ICT Skills of Students at an Urban Community College

    Science.gov (United States)

    McManus, Teresa L.

    2005-01-01

    Colleges and universities seeking to assess proficiencies in information and communications technology may wish to learn more about new assessment tools developed by the Educational Testing Service (ETS), in collaboration with higher education partners. This article describes the administration of the Information and Communication Technology (ICT)…

  1. Key Factors in Obstetric Delivery Decision-Making among Asian and Pacific Islander Women by English Proficiency.

    Science.gov (United States)

    Davis, Chevelle Ma; Guo, Mary; Miyamura, Jill; Chang, Ann; Nelson-Hurwitz, Denise C; Sentell, Tetine

    2017-10-01

    Childbirth is the most common reason women are hospitalized in the United States. Understanding (1) how expectant mothers gather information to decide where to give birth, and (2) who helps make that decision, provides critical health communication and decision-making insights. Diverse Asian American and Pacific Islander (AA/PI) perspectives on such topics are understudied, particularly among those with limited English proficiency (LEP). LEP is defined as having a limited ability to read, write, speak, or understand English. To address this research gap, we interviewed 400 women (18+ years) with a recent live birth on O'ahu, Hawai'i. Participants completed a 1-hour, in-person interview in English (n=291), Tagalog (n=42), Chinese (n=36), or Marshallese (n=31). Women were asked (1) what information was most important in deciding where to deliver and why; and (2) who participated in the decision-making and why. Responses were compared by LEP (n=71; 18%) vs English-proficient (n=329; 82%) in qualitative and quantitative analyses. Both LEP and English-proficient participants reported their obstetrician as the most important source of health information. Significantly more LEP participants valued advice from family or acquaintances as important sources of information compared to English-proficient participants. The top three health decision-makers for both those with LEP and English-proficient participants were themselves, their obstetrician, and their spouse, which did not differ significantly by language proficiency. These findings provide insights into health information sources and decision-making across diverse AA/PI populations, including those with LEP, and can help direct health interventions such as disseminating patient education and healthcare quality information.

  2. Last LEP superconducting module travels to surface

    CERN Multimedia

    Patrice Loïez

    2001-01-01

    The last superconducting module is raised from the Large Electron-Positron (LEP) collider tunnel, through the main shaft, to the surface. Superconducting modules were only used in the LEP-2 phase of the accelerator, from 1996 to 2000.

  3. Preparing last LEP superconducting module for removal

    CERN Multimedia

    Patrice Loïez

    2000-01-01

    The last superconducting module travels along the LEP tunnel towards one of the shafts where it will be lifted to the surface. Superconducting modules were only used in the LEP-2 phase of the accelerator, from 1996 to 2000.

  4. Learning Strategies in Proficient and Less Proficient Readers in Medicine

    Science.gov (United States)

    Nemati, Majid; Nodoushan, Mohammad Ali Salmani; Ashrafzadeh, Anis

    2010-01-01

    The current study aimed to diagnose the probable significant differences in the use of language learning strategies among medical-text readers of opposite sex from different levels of proficiency. 120 (N = 120) participants were randomly selected from Azad Medical University of Mashhad: 60 medical students (age range 23-25; 30 = male and 30 =…

  5. The DELPHI experiment at LEP

    International Nuclear Information System (INIS)

    Alekseev, G.D.; Bardin, D. Yu.; Bilen'kij, M.S.

    2000-01-01

    This paper summarizes the current status of the DELPHI experiment, which is operating at the Large Electron Positron (LEP) Collider at CERN. The results from running at the energies around the Z resonance (LEP1) are based on the full available data, while the results obtained at higher energies (LEP2) are based on the data collected up to 1998. The analysis of the data collected at the highest centre-of-mass energies (above 200 GeV) is still in progress and new results are expected. We present briefly some of the most important DELPHI results paying a special attention to the contribution of JINR group to the detector construction and data analysis

  6. CERN: Higher energies at LEP

    International Nuclear Information System (INIS)

    Anon.

    1995-01-01

    This year will be the last that CERN's 27-kilometre LEP electron-positron collider will run routinely at around 45 GeV per beam. In the run, scheduled to begin in May, the four big experiments will top up their harvest so far of over 12 million Z particles for a final polishing of precision Z data. Behind the scenes, LEP is being prepared for higher energy running and a new phase of physics. After a brief technical stop in October, the aim is for a test run of up to 70 GeV per beam before the end of the year. Higher energy demands more radiofrequency power, which will be supplied by superconducting cavities. With this goal in mind, a programme of development work began at CERN over ten years ago, when LEP was still on the drawing board. Initially this effort focused on cavities made from sheet niobium, but later switched to copper covered by a sputtered niobium film, which gives better thermal and r.f. performance (September 1990, page 24). The first industrially-manufactured four-cavity niobium coated module, complete with its cryostat and r.f plumbing, was installed in LEP in 1993. Although it quickly achieved its nominal accelerating gradient of 6 MV/m, its reliability was affected by unforeseen problems in the associated power couplers. This delayed the installation schedule, but after a crash programme of design and modification of the power couplers, together with improvements in actual cavity design and manufacture, module supply and testing has now attained a satisfactory rhythm. Two modules installed in LEP amassed between them over 50 days of continuous running in 1994, and confidence is now high that the emphasis can shift towards integrating the cavities into LEP, rather than running the cavities themselves. During LEP's 1994-5 winter shutdown, modules are being installed at Points 2 and 6. Later, additional cavities will be installed in Points 2, 6 and 8 prior to embarking on the higher energy test run at the end of the year. After

  7. Light Higgs bosons at LEP

    International Nuclear Information System (INIS)

    Ekspong, G.

    1981-11-01

    Among possible production reactions for neutral Higgs bosons it is known that e + e - →Z 0 +H 0 offers advantages of relatively high production cross section and low background from other reactions. With Z 0 decaying to two electrons, which are measured, the existence of a Higgs candidate will be seen as a peak in the missing mass spectrum. It is shown that a sufficiently good mass resolution is obtainable to make a search for Higgs feasible at LEP. In its first phase, the energy of LEP limits the search to Higgs bosons of mass around 10 GeV. (Auth.)

  8. Heavy flavour decays at LEP

    CERN Document Server

    Rousseau, D H

    2001-01-01

    Recent heavy flavour results from LEP experiments are presented. Special emphasis is put on complex inclusive B reconstruction methods with high potentialities for lifetime, mixing, CP violation studies and new measurements of IVubl· The new world average of r8-f'r8o is 1.08 ± 0.03. The new world average of Re parameter measured in inclusive B0 decay is 0.001 ± 0.009. The new LEP average of JV ub I measured from inclusive b->ulv branching fraction is 4.

  9. The Effects of Open Enrollment, Curriculum Alignment, and Data-Driven Instruction on the Test Performance of English Language Learners (ELLs) and Re-Designated Fluent English Proficient Students (RFEPs) at Shangri-La High School

    Science.gov (United States)

    Miles, Eva

    2013-01-01

    The purpose of this study was to examine the impact of open enrollment, curriculum alignment, and data-driven instruction on the test performance of English Language Learners (ELLs) and Re-designated Fluent English Proficient students (RFEPs) at Shangri-la High School. Participants of this study consisted of the student population enrolled in…

  10. An Accounting Writing Proficiency Survey

    Science.gov (United States)

    Firch, Tim; Campbell, Annhenrie; Filling, Steven; Lindsay, David H.

    2011-01-01

    Although there has been much discussion about improving college student writing with college-level courses, little is known about how accounting programs, in particular, are addressing the writing proficiency challenge. This study surveys the 852 accounting programs in the United States to identify the frequency and types of accounting writing…

  11. Parental limited English proficiency and health outcomes for children with special health care needs: a systematic review.

    Science.gov (United States)

    Eneriz-Wiemer, Monica; Sanders, Lee M; Barr, Donald A; Mendoza, Fernando S

    2014-01-01

    One in 10 US adults of childbearing age has limited English proficiency (LEP). Parental LEP is associated with worse health outcomes among healthy children. The relationship of parental LEP to health outcomes for children with special health care needs (CSHCN) has not been systematically reviewed. To conduct a systematic review of peer-reviewed literature examining relationships between parental LEP and health outcomes for CSHCN. PubMed, Scopus, Cochrane Library, Social Science Abstracts, bibliographies of included studies. Key search term categories: language, child, special health care needs, and health outcomes. US studies published between 1964 and 2012 were included if: 1) subjects were CSHCN; 2) studies included some measure of parental LEP; 3) at least 1 outcome measure of child health status, access, utilization, costs, or quality; and 4) primary or secondary data analysis. Three trained reviewers independently screened studies and extracted data. Two separate reviewers appraised studies for methodological rigor and quality. From 2765 titles and abstracts, 31 studies met eligibility criteria. Five studies assessed child health status, 12 assessed access, 8 assessed utilization, 2 assessed costs, and 14 assessed quality. Nearly all (29 of 31) studies used only parent- or child-reported outcome measures, rather than objective measures. LEP parents were substantially more likely than English-proficient parents to report that their CSHCN were uninsured and had no usual source of care or medical home. LEP parents were also less likely to report family-centered care and satisfaction with care. Disparities persisted for children with LEP parents after adjustment for ethnicity and socioeconomic status. Parental LEP is independently associated with worse health care access and quality for CSHCN. Health care providers should recognize LEP as an independent risk factor for poor health outcomes among CSHCN. Emerging models of chronic disease care should integrate and

  12. Proverb Comprehension as a Function of Reading Proficiency in Preadolescents.

    Science.gov (United States)

    Nippold, Marilyn A.; Allen, Melissa M.; Kirsch, Dixon I.

    2001-01-01

    Proverb comprehension through reading was examined in 42 preadolescent students, 24 of whom were identified as "proficient readers," and 18 as "less proficient readers." Comprehension on both unfamiliar concrete and abstract proverbs was associated with reading proficiency, word knowledge, and analogical reasoning. (Contains references.)…

  13. The convergent LEP and SPS control systems

    International Nuclear Information System (INIS)

    Altaber, J.

    1987-01-01

    The major design contraint of the control system for LEP is the compatibility with the existing SPS control system. The first reason for this compatibility is to allow a long term convergence of the SPS control system towards the LEP one. The second reason is to operate both LEP and SPS machines from a unique main control room. The distributed architecture of LEP and the existing SPS control systems are described. The design of the equipment interface for both machines is explained. Finally, the infrastructure of the common main control room for LEP and SPS is described

  14. LEP superconducting accelerating cavity module

    CERN Multimedia

    1995-01-01

    With its 27-kilometre circumference, the Large Electron-Positron (LEP) collider was the largest electron-positron accelerator ever built. The excavation of the LEP tunnel was Europe’s largest civil-engineering project prior to the Channel Tunnel. Three tunnel-boring machines started excavating the tunnel in February 1985 and the ring was completed three years later. In its first phase of operation, LEP consisted of 5176 magnets and 128 accelerating cavities. CERN’s accelerator complex provided the particles and four enormous detectors, ALEPH, DELPHI, L3 and OPAL, observed the collisions. LEP was commissioned in July 1989 and the first beam circulated in the collider on 14 July. The collider's initial energy was chosen to be around 91 GeV, so that Z bosons could be produced. The Z boson and its charged partner the W boson, both discovered at CERN in 1983, are responsible for the weak force, which drives the Sun, for example. Observing the creation and decay of the short-lived Z boson was a critical test of...

  15. Heavy quark physics from LEP

    International Nuclear Information System (INIS)

    Dornan, P.J.

    1997-01-01

    A review of some of the latest results on heavy flavor physics from the LEP Collaborations is presented. The emphasis is on B physics, particularly new results and those where discrepancies is given of the many techniques which have been developed to permit these analyses

  16. LEP dominates LP-HEP

    International Nuclear Information System (INIS)

    Fraser, Gordon

    1991-01-01

    CERN's LEP electron-positron collider was the star of this year's major physics meeting - the Joint International Lepton-Photon Symposium and Europhysics Conference on High Energy Physics (LP-HEP) - held in Geneva from 25 July - 1 August

  17. Heavy quark physics from LEP

    Energy Technology Data Exchange (ETDEWEB)

    Dornan, P.J. [Imperial College of Science Technology and Medicine, London (United Kingdom)

    1997-01-01

    A review of some of the latest results on heavy flavor physics from the LEP Collaborations is presented. The emphasis is on B physics, particularly new results and those where discrepancies is given of the many techniques which have been developed to permit these analyses.

  18. Higgs particle searches at LEP

    International Nuclear Information System (INIS)

    Martin, J.P.

    1996-01-01

    Results on searches for the Higgs particle performed by the four LEP experiments are received in the framework of the Standard Model, Two Doublet Model, and Minimal Supersymmetric Model. The combined mass lower limit for the standard Higgs boson is 66 GeV/c 2 at 95 % CL for a statistics of 14.6 Million hadronic Z decays. (authors)

  19. CERN: LEP in action again

    International Nuclear Information System (INIS)

    Anon.

    1990-01-01

    On 25 March, electron and positron beams were colliding again in LEP, CERN's new 27-kilometre electron-positron collider, marking the end of the winter shutdown and the commencement of a hefty run scheduled to last, with only minor interruptions, through to the end of August

  20. Colour reconnection at LEP2

    CERN Document Server

    Abreu, P

    2002-01-01

    The preliminary results on the search of colour reconnection effects (CR) from the four experiments at LEP, ALEPH, DELPHI, L3 and OPAL, are reviewed. Extreme models are excluded by studies of standard variables, and on going studies of a method first suggested by L3, the particle flow method (D. Duchesneau, (2001)), are yet inconclusive. (22 refs).

  1. LEP for twice the energy

    Energy Technology Data Exchange (ETDEWEB)

    Anon.

    1993-01-15

    In 1995, CERN's 27-kilometre LEP electron-positron collider should start operating for physics at considerably higher energy. Since its commissioning in 1989, the machine has been operating around 45.5 GeV per beam to give collision energies that home in on the Z particle - the electrically neutral carrier of the weak nuclear force, with a mass of 91 GeV. The Z, discovered at CERN in 1983 by Carlo Rubbia's UA1 protonantiproton tour de force, was for a long time a rare physics jewel. Until LEP came along, only a handful had been seen. With millions now captured by the four LEP experiments - Aleph, Delphi, L3 and Opal - the Z has become everyday physics, and the accumulated precision Z data give an incisive view inside today's Standard Model. The self-consistency of these measurements make physicists confident that the sixth ('top') quark should turn up around 150 GeV. But the Z is only one side of the picture. For the self-consistency of the Standard Model to become really watertight, a precision fix is also needed on the W at 81 GeV, the electrically charged companion of the Z. While the neutral Z can be produced directly in electron-positron annihilations, the charged Ws can only be produced in pairs, hence the call for higher energies at LEP. (The project is known as LEP200, but 200 GeV is acknowledged as an optimistic energy target.) To roughly double beam energy from around 45 GeV for Z physics to the level needed for W production calls for an additional 1900 Megavolts of accelerating voltage.

  2. LEP for twice the energy

    International Nuclear Information System (INIS)

    Anon.

    1993-01-01

    In 1995, CERN's 27-kilometre LEP electron-positron collider should start operating for physics at considerably higher energy. Since its commissioning in 1989, the machine has been operating around 45.5 GeV per beam to give collision energies that home in on the Z particle - the electrically neutral carrier of the weak nuclear force, with a mass of 91 GeV. The Z, discovered at CERN in 1983 by Carlo Rubbia's UA1 protonantiproton tour de force, was for a long time a rare physics jewel. Until LEP came along, only a handful had been seen. With millions now captured by the four LEP experiments - Aleph, Delphi, L3 and Opal - the Z has become everyday physics, and the accumulated precision Z data give an incisive view inside today's Standard Model. The self-consistency of these measurements make physicists confident that the sixth ('top') quark should turn up around 150 GeV. But the Z is only one side of the picture. For the self-consistency of the Standard Model to become really watertight, a precision fix is also needed on the W at 81 GeV, the electrically charged companion of the Z. While the neutral Z can be produced directly in electron-positron annihilations, the charged Ws can only be produced in pairs, hence the call for higher energies at LEP. (The project is known as LEP200, but 200 GeV is acknowledged as an optimistic energy target.) To roughly double beam energy from around 45 GeV for Z physics to the level needed for W production calls for an additional 1900 Megavolts of accelerating voltage

  3. CERN: LEP in the Alps

    International Nuclear Information System (INIS)

    Anon.

    1993-01-01

    Full text: In January, when CERN's LEP electron-positron collider is enjoying a well-earned break, it has now become traditional for the hard pressed LEP team to have no respite. Instead they pack their bags and depart for Chamonix in the nearby French Alps to review the past year's experience and plan for the future. In the cold January 1993 light of Chamonix, 1992 (January/February, page 4) was deemed to have been a good year for LEP operations, with the switch to 90° betatron phase operation having paid off. The 65% improvement in integrated luminosity over 1991 was attributed to longer beam lifetimes, faster filling and improved overall efficiency. The commissioning of the eight-bunch 'pretzel' scheme was facilitated with the new optics, and break-even quickly achieved, so that physics could benefit from more bunches in the machine. During 1992, the injection chain was fully tested with eight bunches, and when this comes into routine operation this year, the pretzel scheme will benefit. Pretzel running also opens the possibility of still higher luminosity, up to 2x10 31 per sq cm per s, doubling the present level. However the finishing touches to high luminosity running are still more an art ('haute cuisine') than a science. Continuing studies of the inter correlation of different LEP conditions will help make this more systematic. The main factors affecting performance at 45 GeV are transverse mode coupling instabilities. The present working point gives good results, but there are still potentially interesting regions which need to be checked out. Beam lifetime and background are both limited by beam size and aperture. Background was reduced by improved focusing, while beam size is dominated by beam-beam effects. 90° operation proved its worth in 1992, but the inability to produce polarized beams was a disappointment, and a combined 90°/60° horizontal/vertical combination looked like offering the best of both worlds. Although

  4. All for knots: evaluating the effectiveness of a proficiency-driven, simulation-based knot tying and suturing curriculum for medical students during their third-year surgery clerkship.

    Science.gov (United States)

    Pender, Cianna; Kiselov, Vladimir; Yu, Qingzhao; Mooney, Jennifer; Greiffenstein, Patrick; Paige, John T

    2017-02-01

    We evaluated the effectiveness of implementing a proficiency-driven, simulation-based knot tying and suturing curriculum for medical students during their 3rd-year surgery clerkship. Medical students on the 3rd-year surgical clerkship completed a proficiency-driven, simulation-based knot tying and suturing curriculum consisting of 6 tasks. The effectiveness was evaluated by comparing the initial presession scores to the final postsession scores on an 8-item self-efficacy scale and evaluating pass rates on end of clerkship skills testing. A paired t test was used to analyze data. Sixty-five students had matched preintervention and postintervention questionnaires for analysis. Pass rates approached 100% by the 3rd attempt on all tasks. Significant gains on all 8 items of the self-efficacy questionnaire from pretraining to post-training were noted. Timing of the general surgery rotation did not impact results. Implementation of a simulation-based training, proficiency-driven knot tying and suturing curriculum for 3rd-year medical students during the surgery clerkship is feasible and effective in improving student self-efficacy and objective proficiency toward performance of the tasks taught. Copyright © 2016 Elsevier Inc. All rights reserved.

  5. LEP vacuum chamber, early prototype

    CERN Multimedia

    CERN PhotoLab

    1978-01-01

    The structure of LEP, with long bending magnets and little access to the vacuum chamber between them, required distributed pumping. This is an early prototype for the LEP vacuum chamber, made from extruded aluminium. The main opening is for the beam. The small channel to the right is for cooling water, to carry away the heat deposited by the synchroton radiation from the beam. The 4 slots in the channel to the left house the strip-shaped ion-getter pumps (see 7810255). The ion-getter pumps depended on the magnetic field of the bending magnets, too low at injection energy for the pumps to function well. Also, a different design was required outside the bending magnets. This design was therefore abandoned, in favour of a thermal getter pump (see 8301153 and 8305170).

  6. Niobium LEP 2 accelerating cavities

    CERN Multimedia

    An accelerating cavity from LEP. This could be cut open to show the layer of niobium on the inside. Operating at 4.2 degrees above absolute zero, the niobium is superconducting and carries an accelerating field of 6 million volts per metre with negligible losses. Each cavity has a surface of 6 m2. The niobium layer is only 1.2 microns thick, ten times thinner than a hair. Such a large area had never been coated to such a high accuracy. A speck of dust could ruin the performance of the whole cavity so the work had to be done in an extremely clean environment. These challenging requirements pushed European industry to new achievements. 256 of these cavities were used in an upgrade of the LEP accelerator to double the energy of the particle beams.

  7. Polarization at LEP. Vol. 2

    International Nuclear Information System (INIS)

    Alexander, G.; Altarelli, G.; Blondel, A.; Coignet, G.; Keil, E.; Plane, D.E.; Treille, D.

    1988-01-01

    This report contains a collection of papers covering the most important part of studies carried out by five study groups in view of a programme of experiments with polarized beams at LEP, the Large Electron-Positron collider under construction at CERN. The emphasis is on precision measurements at the Z peak. Such measurements are shown to be of considerable theoretical interest as well as very clean from the point of view of theoretical and experimental uncertainties. The measurement of the beam polarization can certainly be performed with sufficient accuracy, thanks to the availability of both e + and e - beam polarization. The normalization of the data taken with different beam helicities poses certain constraints that are described. Substantial progress has been made in understanding the possibility of providing longitudinally polarized beams in the LEP machine: The design of new wigglers and spin rotators, the study of correction procedures and results of numerical simulations are presented. (orig.)

  8. LEP Radio Frequency Copper Cavity

    CERN Multimedia

    The pulse of a particle accelerator. 128 of these radio frequency cavities were positioned around CERN's 27-kilometre LEP ring to accelerate electrons and positrons. The acceleration was produced by microwave electric oscillations at 352 MHz. The electrons and positrons were grouped into bunches, like beads on a string, and the copper sphere at the top stored the microwave energy between the passage of individual bunches. This made for valuable energy savings as it reduced the heat generated in the cavity.

  9. Slice of a LEP bending magnet

    CERN Multimedia

    This is a slice of a LEP dipole bending magnet, made as a concrete and iron sandwich. The bending field needed in LEP is small (about 1000 Gauss), equivalent to two of the magnets people stick on fridge doors. Because it is very difficult to keep a low field steady, a high field was used in iron plates embedded in concrete. A CERN breakthrough in magnet design, LEP dipoles can be tuned easily and are cheaper than conventional magnets.

  10. The Heavy Baryon Physics by means LEP

    International Nuclear Information System (INIS)

    Lesiak, T.

    2000-07-01

    This report describes the experimental research about the heavy baryons which were obtained in the last decade at LEP. The most important among them concern the lifetimes of beauty baryons. The methods of theoretical description of heavy hadrons together with the LEP experimental apparatus are also discussed. Heavy baryon studies are shown in a broader perspective of other LEP results: the test of the standard model and the latest measurements concerning the beauty mesons. (author)

  11. A study of the effects of English language proficiency and scientific reasoning skills on the acquisition of science content knowledge of Hispanic English language learners and native English language-speaking students participating in grade 10 science classes

    Science.gov (United States)

    Torres, Hector Neftali, Sr.

    2000-11-01

    The purpose of this study was to examine the effects of English language proficiency and levels of scientific reasoning skills of Hispanic English language learners and native English language speaking students on their acquisition of science content knowledge as measured by a state-wide standardized science test. The researcher studied a group of high school Hispanic English language learners and native English language speaking students participating in Grade 10 science classes. The language proficiency of the students was to be measured through the use of the Test of English as a Foreign Language (TOEFL) instrument. A Classroom Test of Scientific Reasoning developed by Lawson (1978) was administered in either English or Spanish to the group of Hispanic English language learners and in English to the group of native English language-speaking students in order to determine their levels of scientific reasoning skills. The students' acquisition of science content knowledge was measured through the use of statewide-standardized science test developed by the State's Department of Education. This study suggests that the levels of English language proficiency appear to influence the acquisition of science content knowledge of Hispanic English language learners in the study. The results of the study also suggest that with regards to scientific reasoning skills, students that showed high levels or reflective reasoning skills for the most part performed better on the statewide-standardized science test than students with intuitive or transitional reasoning skills. This assertion was supported by the studies conducted by Lawson and his colleagues, which showed that high levels of reasoning or reflective reasoning skills are prerequisite for most high school science courses. The findings in this study imply that high order English language proficiency combined with high levels of reasoning skills enhances students' abilities to learn science content subject matter. This

  12. English Proficiency and Participation in Online Discussion for Learning

    Science.gov (United States)

    Leung, Steve

    2013-01-01

    Does English proficiency affect participation in online discussion? This study polled 14 students from a postgraduate online course that require online discussion. The students are divided into groups according to their home language spoken and self-assessed English proficiency, and measure against their participation level in the required…

  13. Vacuum Chambers for LEP sections

    CERN Multimedia

    1983-01-01

    The picture shows sections of the LEP vacuum chambers to be installed in the dipole magnets (left) and in the quadrupoles (right). The dipole chamber has three channels: the beam chamber, the pumping duct where the NEG (non-evaporabe getter) is installed and the water channel for cooling (on top in the picture). The pumping duct is connected to the beam chamber through holes in the separating wall. The thick lead lining to shield radiation can also be seen. These chambers were manufactured as extruded aluminium alloy profiles.

  14. Electroweak interactions at LEP energies

    International Nuclear Information System (INIS)

    McKellar, B.H.J.

    1990-01-01

    Some of the processes that have been observed at LEP energies, particularly the decay rate for Z 0 →ff-bar, and the forward-backward asymmetry in the process e +e- →ff-bar are presented. It is also discussed how measurement of Z 0 width counts the number of light neutrinos and how one can look for the Higgs particle and for other exotic particles in the decay of the Z 0 and calculate some of the expected rates. The important role played by radiative corrections in the analysis of data is emphasised. 33 refs., 5 tabs., 7 figs

  15. Recent physics results from LEP

    International Nuclear Information System (INIS)

    Augustin, J.E.

    1990-12-01

    The LEP machine operations, the recent observation of transverse beam polarization, and the luminosity measurements are summarized. The results obtained up to now on the tests of the electroweak sector of the Standard Model are reviewed. This includes the Z neutral boson excitation curve parameters in hadronic and leptonic modes, the forward-backward asymmetries of the leptons, the detection of the polarization of the taus, and the corresponding results on the number of light neutrinos, on the electroweak coupling constants and mixing angle, and on the top quark mass. Some hadronic physics results and QCD studies are reported. The results for particle searches, notably the Higgs boson are summarized

  16. Anomalous couplings at LEP2

    International Nuclear Information System (INIS)

    Fayolle, D.

    2002-01-01

    In its second phase, LEP has allowed to study four fermion processes never observed before. Results are presented on the charged triple gauge boson couplings (TGC) from the W-pair, Single W and Single γ production. The anomalous quartic gauge couplings (QGC) are constrained using production of WWγ, νν-barγγ and Z γγ final states. Finally, limits on the neutral anomalous gauge couplings (NGC) using the Z γ and ZZ production processes are also reported. All results are consistent with the Standard Model expectations. (authors)

  17. Selected topics on B physics at Lep

    International Nuclear Information System (INIS)

    Roudeau, P.

    1989-05-01

    I will consider mainly those aspects of B physics which are peculiarly relevant at LEP. I will envisage two scenarios for LEP operation: the standard one with the nominal luminosity and also a high luminosity run during which more than 10 8 hadronic Z 0 decays can be registered

  18. Diagram of a LEP superconducting cavity

    CERN Multimedia

    1991-01-01

    This diagram gives a schematic representation of the superconducting radio-frequency cavities at LEP. Liquid helium is used to cool the cavity to 4.5 degrees above absolute zero so that very high electric fields can be produced, increasing the operating energy of the accelerator. Superconducting cavities were used only in the LEP-2 phase of the accelerator, from 1996 to 2000.

  19. W boson physics at LEP2

    International Nuclear Information System (INIS)

    Tonazzo, A.

    2000-01-01

    The precision study of W boson properties is one of the most important goals of the LEP2 physics programme. This paper provides an overview of the measurements performed by the four LEP experiments, with particular emphasis on the extraction of the W mass. A review of the results obtained with the data collected until 1999 is also presented

  20. LEP des inquiétudes subsistent

    CERN Multimedia

    1984-01-01

    Certains propriétaires de terrains et de constructions situés sur le pourtour du LEP restent inquiets: qu'arriverait-il an cas de contestation sur la valeur de réparation d'éventuels dommages causés par la construction du LEP? (1 page).

  1. Monitoring the waste water of LEP

    CERN Document Server

    Rühl, I

    1999-01-01

    Along the LEP sites CERN is discharging water of differing quality and varying amounts into the local rivers. This wastewater is not only process water from different cooling circuits but also water that infiltrates into the LEP tunnel. The quality of the discharged wastewater has to conform to the local environmental legislation of our Host States and therefore has to be monitored constantly. The most difficult aspect regarding the wastewater concerns LEP Point 8 owing to an infiltration of crude oil (petroleum), which is naturally contained in the soil along octant 7-8 of the LEP tunnel. This paper will give a short summary of the modifications made to the oil/water separation unit at LEP Point 8. The aim was to obtain a satisfactory oil/water separation and to install a monitoring system for a permanent measurement of the amount of hydrocarbons in the wastewater.

  2. German Language Proficiency among Students of Business and Management in the Czech Republic and its Perception: The Importance of German Language Skills on the Labour Market and the Role of Universities in Foreign Language Training

    Directory of Open Access Journals (Sweden)

    Zinecker Marek

    2014-09-01

    Full Text Available This paper presents the results of an empirical study designed to map German language proficiency among students at Czech universities of business and management. The results of this empirical survey can be summarised as follows. First, the ability of students at Czech universities of business and management to communicate in German is poor, and exceeds the general German language proficiency of the Czech population only to an insignificant extent. Second, the school environment (the opportunity to learn the language, compulsory subject, language study motivation has a decisive influence on the respondents’ ability to communicate in German. Third, nearly three-quarters of the respondents perceive German as a language that is very or rather important for their profession and career growth. Fourth, almost two-thirds of the respondents consider the role played by a university of business and management in the improvement of German language proficiency rather or very important. In conclusion, the study proposes directions for the potential development of the national educational system in the area of German language proficiency of university graduates in business and management in the Czech Republic, with an emphasis on the concept of content and language integrated learning (CLIL. We believe that the survey results are also very important from the point of view of enterprises operating in the Czech Republic because of the very close economic relations between the Czech Republic and German-speaking countries.

  3. Teacher educators' competences in fostering student teachers' proficiency in teaching and learning with technology : An overview of relevant research literature

    NARCIS (Netherlands)

    Dana Uerz; Monique Volman; Marijke Kral

    2018-01-01

    Teacher educators play an important role in preparing student teachers to integrate technology into their classrooms. This article presents an overview of research literature on teacher educators' competences in preparing their students to teach with technology. A literature search yielded 26

  4. Academic Self-Efficacy, Social Relationships, and English Language Proficiency as Predictors of International Students' College Satisfaction

    Science.gov (United States)

    Eldaba, Abir

    2016-01-01

    International students represent a significant proportion of the college student population in the United States (Institute of International Education, 2015). They contribute to campus research, diversity, and the economy. In order to maintain these academic, cultural, and economic profits, universities should investigate the factors related to…

  5. Proficiency tests, Evaluating

    NARCIS (Netherlands)

    Cofino, W.P.; Molenaar, J.; Torfs, P.J.J.F.

    2017-01-01

    Marine monitoring programs provide data that are essential for marine management. The reliability of such data is underpinned by proficiency tests. In the context of Quasimeme, a proficiency testing program for the marine environment, a statistical model has been developed in 2000 to evaluate data

  6. Self-esteem and stress coping among proficiency certificate level nursing students in nursing campus Maharajgunj and Lalitpur Nursing Campus.

    Science.gov (United States)

    Shrestha, T

    2013-09-01

    Nursing requires high self-esteem and effective coping strategies for the quality of health services that they deliver. Self -esteem and stress coping mechanism developed during education period is foundation for professional practice. So, this study was conducted to identify self-esteem, coping activities, and their relationship. Descriptive cross sectional study was conducted among 287 PCL nursing students currently studying in different level in nursing campuses of the Institute of Medicine during June and July 2013. Self administered semi structured questionnaire and rating scales were used for the data collection. Findings showed that 21 (7.31%), 194 (67.5%), and 67 (23.34%), students had have very high, high and moderate, self-esteem and only five (1.74%) have low self-esteem.The difference in self-esteem level was insignificant with the level of the students. Students most frequently used problem focused (3.36±0.54) followed by emotion focused (3.04±0.45) and avoidance coping activities (2.91±0.63). The relationship of use of coping activities and level of students was statistically insignificant. Self-esteem level had positive relation with problem focused and emotion focused coping activities (Pearson r: 0.114 and 0.118), though the correlation was significant with emotion focused coping activities only. Bicytopenia and pancytopenia were seen in two cases each of myelodysplastic syndrome. Chronic myeloid leukemia and Non-Hodgkin lymphoma showed anemia and pancytopenia respectively. Majority of PCL nursing students have high level of self-esteem. They used problem focused coping activities most however, use of it decreased with increased level of students. Students with high self -esteem used problem focused followed by emotion focused coping activities. Students should be encouraged to use problem focused coping activities.

  7. Probing the Big Bang with LEP

    Energy Technology Data Exchange (ETDEWEB)

    Schramm, D.N. (Chicago Univ., IL (USA) Fermi National Accelerator Lab., Batavia, IL (USA))

    1990-06-01

    It is shown that LEP probes the Big Bang in two significant ways: (1) nucleosynthesis and (2) dark matter constraints. In the first case, LEP verifies the cosmological standard model prediction on the number of neutrino types, thus strengthening the conclusion that the cosmological baryon density is {approximately}6% of the critical value. In the second case, LEP shows that the remaining non-baryonic cosmological matter must be somewhat more massive and/or more weakly interacting that the favorite non-baryonic dark matter candidates of a few years ago. 59 refs., 4 figs., 2 tabs.

  8. Probing the Big Bang with LEP

    International Nuclear Information System (INIS)

    Schramm, D.N.

    1990-06-01

    It is shown that LEP probes the Big Bang in two significant ways: (1) nucleosynthesis and (2) dark matter constraints. In the first case, LEP verifies the cosmological standard model prediction on the number of neutrino types, thus strengthening the conclusion that the cosmological baryon density is ∼6% of the critical value. In the second case, LEP shows that the remaining non-baryonic cosmological matter must be somewhat more massive and/or more weakly interacting that the favorite non-baryonic dark matter candidates of a few years ago. 59 refs., 4 figs., 2 tabs

  9. slice of LEP beamtube with getter strip

    CERN Multimedia

    1989-01-01

    A section of the LEP beam pipe. This is the chamber in which LEP's counter-rotating electron and positron beams travel. It is made of lead-clad aluminium. The beams circulate in the oval cross-section part of the chamber. In the rectangular cross-section part, LEP's innovative getter-strip vacuum pump is installed. After heating to purify the surface of the getter, the strip acts like molecular sticky tape, trapping any stray molecules left behind after the accelerator's traditional vacuum pumps have done their job.

  10. Probing the Big Bang with LEP

    Science.gov (United States)

    Schramm, David N.

    1990-01-01

    It is shown that LEP probes the Big Bang in two significant ways: (1) nucleosynthesis, and (2) dark matter constraints. In the first case, LEP verifies the cosmological standard model prediction on the number of neutrino types, thus strengthening the conclusion that the cosmological baryon density is approximately 6 percent of the critical value. In the second case, LEP shows that the remaining non-baryonic cosmological matter must be somewhat more massive and/or more weakly interacting than the favorite non-baryonic dark matter candidates of a few years ago.

  11. Prototype steel-concrete LEP dipole magnet

    CERN Multimedia

    1981-01-01

    The magnetic field needed in the LEP dipole magnets was rather low, of a fraction of tesla. This lead to the conception of a novel yoke structure consisting of stacks of 1.5 mm thick low-carbon steel laminations spaced by 4.1 mm with the spaces filled with concrete. The excitation coils were also very simple: aluminium bars insulated by polyester boxes in this prototype, by glass-epoxy in the final magnets. For details see LEP-Note 118,1978 and LEP-Note 233 1980. See also 8111529,7908528X.

  12. L3: Experiment for LEP

    International Nuclear Information System (INIS)

    Anon.

    1985-01-01

    The detector features a large magnetic hall enclosing an easily modifiable central detector, with physics objectives extending beyond those of the initial phase of LEP running (collision energies of around 100 GeV). The design places great emphasis on high precision (one per cent) measurement of photon, electron and muon momenta, together with good resolution of hadron jets and precise information from the interaction vertex. To be installed 50 m below ground, the detector will be enclosed in a 8000 ton solenoid, 15.6 m high and 13.6 m long, providing a central field of 0.5 t. At the centre of this magnetic 'cave' will be the vertex detector, a 'Time Expansion Chamber' (TEC) extending 50 cm radially from the interaction point and providing high spatial and track separation resolution. (orig./HSI).

  13. Does Birth Order and Academic Proficiency Influence Perfectionistic Self-presentation Among Undergraduate Engineering Students? A Descriptive Analysis.

    Science.gov (United States)

    Louis, Preeti Tabitha; Kumar, Navin

    2016-01-01

    Perfectionism is a multifaceted concept. It had both advantages and disadvantages. Perfectionistic traits have been associated with leadership and very intellectual people. The present study is an attempt to understand if engineering students possess perfectionistic orientation and whether it influences self-efficacy, social connectedness, and achievement motivation. The present study adopts a random sampling design to evaluate the presence of perfectionism as a personality trait among undergraduate engineering students ( N = 320). Standardized inventories such as Almost Perfect Scale-Revised were administered first to identify perfectionists and second to differentiate the adaptive from the maladaptive perfectionists. Scheduled interviews were conducted with students to obtain information regarding birth order and family functioning. Findings from the study reveal that there were a significant number of maladaptive perfectionists and that they experienced higher levels of personal and societal demands leading to a negative emotional well-being in comparison to the adaptive perfectionists. We also observed that first-born children were more likely to display a perfectionistic self-presentation and from scheduled interviews, we understood that paternal influences were stronger when it came to decision-making and display of conscientiousness. The study draws on important implications for helping students to understand perfectionism and to respond to demands of the family and societal subsystems in a positive and an adaptive manner.

  14. Does Birth Order and Academic Proficiency Influence Perfectionistic Self-presentation Among Undergraduate Engineering Students? A Descriptive Analysis

    Science.gov (United States)

    Louis, Preeti Tabitha; Kumar, Navin

    2016-01-01

    Background: Perfectionism is a multifaceted concept. It had both advantages and disadvantages. Perfectionistic traits have been associated with leadership and very intellectual people. The present study is an attempt to understand if engineering students possess perfectionistic orientation and whether it influences self-efficacy, social connectedness, and achievement motivation. Materials and Methods: The present study adopts a random sampling design to evaluate the presence of perfectionism as a personality trait among undergraduate engineering students (N = 320). Standardized inventories such as Almost Perfect Scale-Revised were administered first to identify perfectionists and second to differentiate the adaptive from the maladaptive perfectionists. Scheduled interviews were conducted with students to obtain information regarding birth order and family functioning. Results: Findings from the study reveal that there were a significant number of maladaptive perfectionists and that they experienced higher levels of personal and societal demands leading to a negative emotional well-being in comparison to the adaptive perfectionists. We also observed that first-born children were more likely to display a perfectionistic self-presentation and from scheduled interviews, we understood that paternal influences were stronger when it came to decision-making and display of conscientiousness. Conclusion: The study draws on important implications for helping students to understand perfectionism and to respond to demands of the family and societal subsystems in a positive and an adaptive manner. PMID:27833225

  15. Beyond Linguistic Proficiency: Early Language Learning as a Lever for Building Students' Global Competence, Self-Esteem, and Academic Success

    Science.gov (United States)

    Livaccari, Chris

    2013-01-01

    It is no exaggeration to say that language learning is the very foundation of global competence and the most deeply effective way for students to be able to "investigate the world, recognize perspectives, communicate ideas, and take action," which is the definition of global competence developed by Asia Society Vice President for…

  16. The Prediction of Reading Levels between Second and Third Grade Limited English Proficient Students in a Bilingual Program

    Science.gov (United States)

    Moses, Britani Creel

    2010-01-01

    The purpose of this study was to predict the third grade English reading TAKS scores while considering the same students' native language, Spanish, reading level as assessed by a state-approved reading assessment, the Evaluacion del desarrollo de la lectura (EDL), from the end of the second grade year. In addition, this study was been designed to…

  17. Perceived language proficiency and pain assessment by registered and student nurses in native English-speaking and EAL children aged 4-7 years.

    Science.gov (United States)

    Azize, Pary M; Cattani, Allegra; Endacott, Ruth

    2018-03-01

    To identify the factors that influence decisions made by health professionals when assessing the pain of native English speaking and children whose English is an additional language. Pain assessment in children is often poorly executed following acute injury. Whilst a range of pain assessment tools have been developed, little guidance is provided for assessing pain in children with English as an additional language. Factorial survey design. Twenty minor injuries unit nurses and 20 children's nursing students participated in an electronic survey to make judgements on 12 scenarios describing a child attending a minor injuries unit following an incident, accompanied by a parent. Respondents had to decide the most important form of pain assessment, and whether they would ask a parent or an interpreter to assess the pain of the child. An open-ended question asked about the difficulties found in making a judgement. Observation of the child's behaviour was the most common pain assessment reported. The visual analogue scale was significantly associated with children with proficient English. Respondents were significantly more likely to involve parents in the assessment if they could speak English well compared to parents with poor English skills. Moreover, nursing students were significantly more likely than registered nurses to call for support from an interpreter. Thematic analysis identified three themes related to difficulties with pain assessment: contrasting approaches, differing perceptions of pain and overcoming challenges. The reduced ability to communicate between child, parent and healthcare professional highlights the need to identify forms of assessment based on individual cases. The number of children with English as an additional language has seen a marked rise over the last decade. In situations where communication ability is reduced, assessment of pain should be tailored to meet the needs of the child. This may require timely access to interpreter services

  18. LEP sees the end of the tunnel

    CERN Multimedia

    2002-01-01

    After 14 months, which have seen the removal of 30,000 tonnes of material from the tunnel, the LEP dismantling operation has now been completed. LHC installation, which will be subject to new safety rules, can go ahead.

  19. Combination of the LEP II ffbar Results

    CERN Document Server

    Geweniger, C; Elsing, M; Goy, C; Holt, J; Liebig, W; Minard, M N; Renton, P B; Riemann, S; Sachs, K; Ward, P; Wynhoff, S

    2002-01-01

    Preliminary combinations of measurements of the 4 LEP collaborations of the process e+e-->ffbar at LEP-II are presented, using data from the full LEP-II data set where available. Cross-sections and forward-backward asymmetry measurements are combined for the full LEP-II data set. Combined differential cross-sections $\\frac{{\\rm d}\\sigma}{{\\rm d}\\cos\\theta}$ for electron-pairs, muon pair and tau-pair final states are presented. Measurements of the production of heavy flavours are combined. The combined results are interpreted in terms of contact interactions and the exchange Z' bosons and leptoquarks, and within models of low scale gravity in large extra dimensions.

  20. CERN: End of LEP's Z era

    Energy Technology Data Exchange (ETDEWEB)

    Anon.

    1995-11-15

    Full text: Achapter of history at CERN's LEP electron-positron collider closed in October when the four big experiments, Aleph, Delphi, L3 and Opal, logged their final data at the Z energy, just over six years after LEP's first Z was detected. The LEP Z era has been one of great success, both in terms of physics results and the advances which have been made with the machine itself. LEP now takes a step towards becoming LEP2, when the energy is wound up from around 45 GeV to about 70 GeV per beam (September, page 6). By the end of LEP's 1995 run, each of the four LEP experiments had seen almost five million Zs. Now the spotlight at LEP shifts to producing pairs of W particles, the electrically charged counterparts of the Z. LEP's first Zs were recorded in August 1989, one month after the machine's first circulating beam. The 30,000 Z decays recorded by each experiment in 1989 confirmed that matter comes in just three distinct families of quarks and leptons. The values of the Z mass and width quoted in 1990 were 91.161 ± 0.031 GeV and 2.534 ± 0.027 GeV. By the beginning of 1995, these had been fine-tuned to the extraordinary accuracy of 91.1884 ± 0.0022 GeV and 2.4963 ± 0.0032 GeV, and when data from this year's run is included, will be even better. These results, combined with precision data from neutrino experiments and from Fermilab's Tevatron protonantiproton collider, have put the Standard Model of quarks and leptons through its most gruelling test yet. Right from the start, collaboration between LEP experiments and the accelerator team has been close, with frequent scheduling meetings determining how the machine is run. For the first few years, LEP ran on a diet of four bunches of electrons and four of positrons, but by the end of 1992, a way had been found to increase the luminosity by squeezing in more bunches. In 1993, the 'pretzel' scheme (October 1992, page 17), so called because of the shape traced out by the circulating beams, was running with eight

  1. LEP superconducting cavities go into storage

    CERN Multimedia

    Patrice Loïez

    2001-01-01

    Superconducting radio-frequency cavities from the LEP-2 phase (1996-2000) are put into storage in the tunnel that once housed the Intersecting Storage Rings (ISR), the world’s first proton collider, located at CERN.

  2. Z Physics at LEP 1. Vol. 3

    International Nuclear Information System (INIS)

    Altarelli, G.; Kleiss, R.; Verzegnassi, C.

    1989-01-01

    The contents of this final report from the Workshop on Z Physics at LEP can be divided into two parts. The first part, comprising Vols. 1 and 2, is a relatively concise but fairly complete handbook on the physics of e + e - annihilation near the Z peak (with normal LEP luminosity and unpolarized beams, appropriate for the first phase of LEP operation). The second part (Vol. 3) is devoted to a review of the existing Monte Carlo event generators for LEP physics. A special effort has been made to co-ordinate the different parts of this report, with the aim of achieving a systematic and balanced review of the subject, rather than having simply a collection of separate contributions. (orig.)

  3. L3 experiment dismantling at LEP

    CERN Multimedia

    Laurent Guiraud

    2001-01-01

    The last muon chamber is removed from the L3 experiment at the LEP collider, which was in operation from 1989 to 2000. The large red magnet yoke will be reused by the ALICE experiment when the LHC is constructed.

  4. Z physics at LEP 1. Vol. 1

    International Nuclear Information System (INIS)

    Altarelli, G.; Kleiss, R.; Verzegnassi, C.

    1989-01-01

    The contents of this final report from the Workshop on Z Physics at LEP can be divided into two parts. The first part, comprising Vols. 1 and 2, is a relatively concise but fairly complete handbook on the physics of e + e - annihilation near the Z peak (with normal LEP luminosity and unpolarized beams, appropriate for the first phase of LEP operation). The second part (Vol. 3) is devoted to a review of the existing Monte Carlo event generators for LEP physics. A special effort has been made to co-ordinate the different parts of this report, with the aim of achieving a systematic and balanced review of the subject, rather than having simply a collection of separate contributions. (orig.)

  5. Le CERN fête le LEP

    CERN Multimedia

    CERN Press Office. Geneva

    2000-01-01

    Members of government from around the world gathered at CERN on 9 October to celebrate the achievements of the Large Electron Positron collider (LEP), the Laboratory's flagship particle accelerator. Over the eleven years of its operational lifetime, LEP has not only added greatly to mankind's pool of knowledge about the Universe, but has also changed the way that particle physics research is done, and proved to be a valuable training ground for young professionals in many walks of life.

  6. Detectors for LEP: methods and techniques

    International Nuclear Information System (INIS)

    Fabjan, C.

    1979-01-01

    This note surveys detection methods and techniques of relevance for the LEP physics programme. The basic principles of the detector physics are sketched, as recent improvement in understanding points towards improvements and also limitations in performance. Development and present status of large detector systems is presented and permits some conservative extrapolations. State-of-the-art techniques and technologies are presented and their potential use in the LEP physics programme assessed. (Auth.)

  7. Probing anomalous gauge boson couplings at LEP

    International Nuclear Information System (INIS)

    Dawson, S.; Valencia, G.

    1994-01-01

    We bound anomalous gauge boson couplings using LEP data for the Z → bar ∫∫ partial widths. We use an effective field theory formalism to compute the one-loop corrections resulting from non-standard model three and four gauge boson vertices. We find that measurements at LEP constrain the three gauge boson couplings at a level comparable to that obtainable at LEPII

  8. Determination of the LEP beam energy

    CERN Document Server

    Torrence, E

    2000-01-01

    This article describes the determination of the LEP beam energy above the production threshold for W boson pairs. A brief overview of the magnetic extrapolation method is presented which is currently used to determine the LEP beam energy to a relative precision of 2*10/sup -4 /. A new method for beam energy measurements based on an in-line energy spectrometer is presented, and current developments in the commissioning of this device are outlined. (2 refs).

  9. The Nevada Proficiency Examination Program: Evaluating the Writing Samples.

    Science.gov (United States)

    Howard, Edward H.

    Writing tests are part of the mandated statewide proficiency examination in Nevada. The ninth-grade screening test and the eleventh-grade diploma-certifying test require that a student write a paragraph and a business letter, each on an assigned topic and each at an acceptable level of proficiency. Pilot tests, extended discussion, and statistical…

  10. Limited english proficiency, primary language at home, and disparities in children's health care: how language barriers are measured matters.

    Science.gov (United States)

    Flores, Glenn; Abreu, Milagros; Tomany-Korman, Sandra C

    2005-01-01

    Approximately 3.5 million U.S. schoolchildren are limited in English proficiency (LEP). Disparities in children's health and health care are associated with both LEP and speaking a language other than English at home, but prior research has not examined which of these two measures of language barriers is most useful in examining health care disparities. Our objectives were to compare primary language spoken at home vs. parental LEP and their associations with health status, access to care, and use of health services in children. We surveyed parents at urban community sites in Boston, asking 74 questions on children's health status, access to health care, and use of health services. Some 98% of the 1,100 participating children and families were of non-white race/ethnicity, 72% of parents were LEP, and 13 different primary languages were spoken at home. "Dose-response" relationships were observed between parental English proficiency and several child and parental sociodemographic features, including children's insurance coverage, parental educational attainment, citizenship and employment, and family income. Similar "dose-response" relationships were noted between the primary language spoken at home and many but not all of the same sociodemographic features. In multivariate analyses, LEP parents were associated with triple the odds of a child having fair/poor health status, double the odds of the child spending at least one day in bed for illness in the past year, and significantly greater odds of children not being brought in for needed medical care for six of nine access barriers to care. None of these findings were observed in analyses of the primary language spoken at home. Individual parental LEP categories were associated with different risks of adverse health status and outcomes. Parental LEP is superior to the primary language spoken at home as a measure of the impact of language barriers on children's health and health care. Individual parental LEP

  11. The Rating of Direct and Semi-Direct Oral Proficiency Interviews: Comparing Performance at Lower Proficiency Levels.

    Science.gov (United States)

    Kenyon, Dorry M.; Tschirner, Erwin

    2000-01-01

    Reports on a study comparing student performances and test reliabilities for the German Speaking Test, a semi-direct tape-mediated oral proficiency test (GST) developed by the Center for Applied Linguistics, and the American Council on the Teaching of Foreign Languages Oral Proficiency Interviews. (Author/VWL)

  12. It Really Works: Cultural Communication Proficiency.

    Science.gov (United States)

    Bennett, Ruth, Ed.

    This paper describes the cultural communication proficiency method of indigenous language instruction, developed at Humboldt State University's Center for Indian Community Development (California), and demonstrates the method with five Hupa lesson plans. The method is based on three principles: that Native American students learn by doing, learn…

  13. Heavy flavour physics at LEP

    International Nuclear Information System (INIS)

    Kluit, P.M.

    1992-01-01

    In this lecture I summarize the LEP results on heavy flavour physics. The topics that are covered are mainly in the field of beauty physics and can be divided in: B physics at the Z resonance (Γsub(b anti b), Asub(b anti b) fb , χ), Beauty signals (B s , Λ b , J/ψ), B lifetime measurements (τ b , τ Bs , τ Λb , τ B+ , and τ B0 ). In the first part I discuss the measurements of the width Γsub(b anti b) and asymmetry Asub(b anti b) fb for the process Z →b anti b, and a determination of the average mixing parameter χ of the b quark. In the second part evidence for B s , Λ b , and J/ψ production in Z decays is shown. In the last part I summarize the measurements of the average b lifetime, and the lifetimes for charged and neutral B hadrons. (orig.)

  14. Comparing Examinee Attitudes Toward Computer-Assisted and Other Oral Proficiency Assessments.

    Science.gov (United States)

    Kenyon, Dorry M.; Malabonga, Valerie

    2001-01-01

    Examined attitudes toward taking different formats of oral proficiency assessments across three languages: Spanish, Arabic, and Chinese. Students were administered both the tape-mediated Simulated Oral Proficiency Interview (SOPI) and a new Computerized Oral Proficiency Instrument (COPI). Questionnaire responses showed examinees, particularly…

  15. 20 years ago: first collisions (at LEP)

    CERN Multimedia

    2009-01-01

    It’s been 20 years since the first electron positron collision at LEP, and I have to confess to a little self-indulgence in my message this week. Back then I was a member of the OPAL collaboration, the first to see collisions at LEP just before midnight on 13 August 1989 and almost exactly one month after the first circulating beam. It was a historic moment, and the atmosphere in the OPAL control room, 100 metres underground, was one of anticipation and excitement. We reported back to the LEP control room, champagne duly arrived, and over the next few hours, all the experiments were recording data. The pilot run was as smooth as it could be, and within weeks we were announcing new physics. It’s interesting to contrast the start-up of LEP with that of the LHC. With the benefit of hindsight, LEP seems to have got going without a hitch, and indeed it was a smooth start. We circulated beam on 14 July, much to the joy of one of our host states, and it was just a month ...

  16. LEP the large electron-positron project

    International Nuclear Information System (INIS)

    Schopper, H.

    1984-01-01

    LEP is an e + e - ring optimized for about 100 GeV per beam. The ring has a circumference of about 26.7 kilometers, and will be 80 to 125 meters deep underground. The existing accelerators, both the PS and the SPS, will be used as injectors. The cost of LEP is 910 million Swiss francs, at 1981 prices. This document describes the outline of the LEP project, especially, in relation to the present CERN site and experimental facilities. The present status of LEP, that is, machine ordering, installation or modification of the existing machines, is explained in the following areas: injection system, magnets, accelerating system, and experimental areas. As for the civil engineering works two international consortia are responsible for the excavation of the tunnel for the main ring. Some photographs are presented to show the status of the civil engineering works. For the transportation of both components and people, a monorail suspended from the ceiling of the tunnel is adopted. The first injection test into an octant is planned in the autumn of 1987, and the first beam all around the LEP will be at the end of 1988. (Aoki, K.)

  17. Experiences of Latinos with limited English proficiency with patient registration systems and their interactions with clinic front office staff: an exploratory study to inform community-based translational research in North Carolina

    OpenAIRE

    Calo, William A.; Cubillos, Laura; Breen, James; Hall, Megan; Rojas, Krycya Flores; Mooneyham, Rachel; Schaal, Jennifer; Hardy, Christina Yongue; Dave, Gaurav; Jolles, M?nica P?rez; Garcia, Nacire; Reuland, Daniel S.

    2015-01-01

    Background Health services research of Latinos with limited English proficiency (LEP) have largely focused on studying disparities related to patient-provider communication. Less is known about their non-provider interactions such as those with patient registration systems and clinic front office staff; these interactions precede the encounter with providers and may shape how comfortable patients feel about their overall health services experience. This study explored Latino patients with LEP...

  18. Improving the provision of language services at an academic medical center: ensuring high-quality health communication for limited-English-proficient patients.

    Science.gov (United States)

    Standiford, Connie J; Nolan, Elizabeth; Harris, Michelle; Bernstein, Steven J

    2009-12-01

    To evaluate and improve the provision of language services at an academic medicine center caring for a diverse population including many limited-English-proficient (LEP) patients. The authors performed a prospective observational study between November 2006 and December 2008 evaluating the provision of language services at the University of Michigan Health System. The primary performance measures were (1) screening patients for their preferred language for health care, (2) assessing the proportion of LEP patients receiving language services from a qualified language services provider, and (3) assessing whether there were any disparities in diabetes care for LEP patients compared with English-speaking patients. The proportion of patients screened for preferred language increased from 59% to 96% with targeted inventions, such as training staff to capture preferred language for health care and correcting prior inaccurate primary language data entry. The proportion of LEP outpatients with a qualified language services provider increased from 19% to 83% through the use of staff and contract interpreters, over-the-phone interpreting and bilingual providers. There were no systematic differences in diabetes quality performance measures between LEP and English-proficient patients. Academic medical centers should measure their provision of language services and compare quality and safety data (e.g., performance measures and adverse events) between LEP and English-speaking patients to identify disparities in care. Leadership support and ongoing training are needed to ensure language-specific services are embedded into clinical care to meet the needs of our diverse patient populations.

  19. Prototype superconducting radio-frequency cavity for LEP

    CERN Multimedia

    1985-01-01

    This niobium superconducting cavity was part of the prototype stages for an upgrade to LEP, known as LEP-2. Superconducting cavities would eventually replace the traditional copper cavities and allow beam energies of 100 GeV.

  20. At LEP, a new Physics. The dark matter

    International Nuclear Information System (INIS)

    Bouquet, A.; Haissinski, J.; Perrottet, M.; Renard, F.M.; Sadoulet, B.; Savoy, C.; Treille, D.

    1990-01-01

    The starting of LEP (European Large Electron-Positron storage rings) took place, in July 1989 and the 5 reports introduced during the 21th Summer School on Particle Physics (Ecole de Gif) locate, after a rapid recall of standard model, the problems that LEP will have to resolve in a more or less long time, LEP 100 or LEP 200. These reports are indexed separately [fr

  1. The LEP2 superconducting RF system

    CERN Document Server

    Butterworth, A; Brunner, O; Ciapala, Edmond; Frischholz, Hans; Geschonke, Günther; Peschardt, E; Sladen, J

    2008-01-01

    The upgrade of LEP2 energy to beyond the W boson production threshold required the progressive installation of a completely new radio-frequency (RF) accelerating system. The new system used superconducting (SC) cavities, which complemented and partially replaced the original LEP1 RF system based on conventional copper cavity technology. The final system consisted of 56 copper and 288 SC cavities and provided a peak acceleration of more than 3600 MV/turn. This paper describes the main elements of the SC system and reviews the 5 years of LEP2 operation at gradients well beyond the design specification. Also presented are some of the main performance limitations and problems encountered together with the various solutions and procedures found to eliminate them or reduce their effects.

  2. Search for new phenomena at LEP

    International Nuclear Information System (INIS)

    Richard, F.

    1992-01-01

    Recent searches for new particles and rare Z degree decays performed at LEP are reviewed. With the first few 10 4 events collected at LEP, many searches have already been performed: pair-produced heavy fermions and scalar bosons, light Higgs boson from the Standard Model (SM) and its most popular supersymmetric extension (MSSM). A large amount of territory has thus been already covered and one is left, after collecting 10 6 z 0 events with the four LEP experiments, with the difficult task to explore the Higgs sector and other Z 0 decays with very low branching ratios, typically a few 10 -5 . This experimental stuggle already pushes the various detectors at the limit of their capabilities and takes advantage of specific properties: momentum resolution for muons, energy resolution for electrons and photons, identification properties for leptons, hadronic calorimetry and hermeticity for neutrinos. 34 refs., 16 figs., 7 tabs

  3. ISOLDE 1985-1987: In the shadow of LEP construction

    CERN Multimedia

    CERN. Geneva

    2014-01-01

    This report describes my time at CERN from 1985 to 1987. Only very briefly before, ISOLDE was recognized by the CERN Management as a CERN facility and not only as a collaboration performing experiments at the synchrocyclotron (SC). Due to LEP construction the human resources were extremely restricted and I acted in one person as ISOLDE Group Leader, as Coordinator of the Synchrocyclotron, and as person responsible for the ISOLDE Technical Group. In addition, I was responsible for the students of my research groups from Mainz University which were active in laser spectroscopy of neutron-deficient nuclides in the mercury region and in getting ISOLTRAP on the floor and into operation. Due to LEP construction also the financial resources were extremely limited and my requests to the EP Division Leader B. Hyams and to the Director General H. Schopper for financial support for installation of a laser ion source and ISOLTRAP were turned down. Still, I and my students had a lot of fun at ISOLDE and I am very happy th...

  4. Proficiency-Based High School Diploma Systems in Maine: Implications for Special Education and Career and Technical Education Programming and Student Populations

    Science.gov (United States)

    Stump, Erika; Johnson, Amy; Jacobs, Cathy

    2017-01-01

    Document review and interviews were conducted with college admissions' personnel to gather data regarding alignment of proficiency-based diploma systems and college eligibility and entry requirements. In addition, leaders and representative personnel from and Maine businesses and the U.S. military were interviewed to identify postsecondary career…

  5. Electroacoustic oscillations in the LEP SC. cavities

    CERN Document Server

    Boussard, Daniel; Tückmantel, Joachim

    1996-01-01

    The LEP superconducting cavities have been plagued by electroacoustic oscillations. Tests have been done to eliminate these by a special feed-back loop in the tuning circuit as well as a feed-forward path, but they could only be eliminated safely up to the design field by running the cavities close to tune neglecting beam-loading compensation. This technique proved successful during the first LEP2 test run at 70 GeV. The mechanism and essential parameters driving these oscillations have been analysed as well as the corresponding stronger loading of the power coupler.

  6. Components for the CERN LEP ring

    Energy Technology Data Exchange (ETDEWEB)

    1987-01-01

    One of the most important experimental setups at the LEP (Large Electron Positron Collider) ring is called OPAL (Omni Purpose Apparatus for LEP). Sulzer-Escher Wyss, Zurich, is to deliver the iron yoke, i.e. the mechanical part of one of the nine OPAL detectors. The contract for the yoke includes essentially the two side parts, each consisting of ten modules and two end caps, the middle part, four special modules and two supporting rings, as well as both the poles. The combined weight of all the supply items comes to some 2300 t. (Auth.).

  7. Measurement of the W mass at LEP

    CERN Document Server

    Przysiezniak, H

    2000-01-01

    The mass of the W boson is measured using W pair events collected with the ALEPH, DELPHI, L3 and OPAL detectors at LEP2. Three methods are used: the cross section method, the lepton energy spectrum method and the direct reconstruction method, where the latter is described more in detail. For data collected at E/sub cm/=161, 172 and 183 GeV, the following combined preliminary result is obtained: M/sub W//sup LEP/=80.37+or-0.08 GeV/c/sup 2/. (5 refs).

  8. Study of event shape variables at LEP

    CERN Document Server

    Sarkar, Subir

    1997-01-01

    We present the LEP results on the study of the hadronic event shape variables. Excellent detector performance and improved theoretical calculations make it possible to study quantum chromodynamics with small experimental and theoretical uncertainties. QCD predictions describe data well at energies above the Z peak.

  9. Quantum chromodynamics studies at LEP2

    Indian Academy of Sciences (India)

    swaban swaban

    Studies of the annihilation process at LEP2 have given rise to results on jet rate, event ..... The electroweak theory explain the data at all these energies. .... like (a) smooth suppression of hadron-like and point-like 7 interaction, (b) dual parton.

  10. LEP - Large Electron Positron Exhibition LEPFest 2000

    CERN Multimedia

    2000-01-01

    The Large Electron-Positron Collider (LEP) is 27 km long. Its four detectors (ALEPH, DELPHI, L3, OPAL) measure precisely what happens in the collisions of electrons and positrons. These conditions only exist-ed in the Universe when it was about 10 -10 sec old.

  11. Power corrections and event shapes at LEP

    CERN Document Server

    Sanders, Michiel P

    2000-01-01

    Measurements of event shape variables from hadronic events collected by the LEP experiments, corresponding to hadronic center of mass energies between 30 GeV and 202 GeV are presented. Fits are performed to extract a, and the effective infrared strong coupling o with the power correction ansatz. Universality is observed for the effective coupling and comparisons are made with fragmentation models.

  12. Electroweak couplings from heavy flavors at LEP

    CERN Document Server

    Clare, R

    1991-01-01

    This talk presents the results of the four LEP experiments, Aleph, Delphi, 13 and Opal, on the partial widths for z0 --> cc and z0 --> bb (r cc and r biJ, and the forward-backward asymmetries Ace and Abb.

  13. Search for new physics at LEP 2

    CERN Document Server

    Gross, Eilam

    1997-01-01

    The results of the search for Higgs bosons, Charginos, Neutralinos, Sleptons, Squarks and light Gravitinos with the LEP accelerator at 130-172 GeV center-of-mass energy are briefly described. Prospects for Standard Model Higgs search at higher center-of-mass energies are also given.

  14. Demonstration model of LEP bending magnet

    CERN Multimedia

    CERN PhotoLab

    1981-01-01

    To save iron and raise the flux density, the LEP bending magnet laminations were separated by spacers and the space between the laminations was filled with concrete. This is a demonstration model, part of it with the spaced laminations only, the other part filled with concrete.

  15. OPAL: selection and acquisition of LEP data

    International Nuclear Information System (INIS)

    Le Du, P.

    1985-01-01

    The OPAL project (Omni Purpose aparatus for LEP) is presented. It will be a frame and an example to explain the main problems and limitations concerning the mode of event selection, acquisition and information transfer to the final registering system. A quick review of the different problems related to data selection and acquisition is made [fr

  16. Particle physics and the LEP project

    International Nuclear Information System (INIS)

    Roussarie, A.

    1985-01-01

    A very didactic chronological account of the last 20 years of elementary particle physics is presented. After some recall on matter constituents and interactions between these constituents, some details are given on researches which will be made in LEP, the e + -e - collider [fr

  17. Maailmas lokkab globaalne terrorism / Ando Leps

    Index Scriptorium Estoniae

    Leps, Ando, 1935-

    2002-01-01

    29. märtsil moodustati Riias ülemaailmsel kuritegevuse- ja terrorismivastasel foorumil Läänemerega piirnevate riikide Kuritegevuse- ja Terrorismivastane Foorum. Võeti vastu põhikiri, nimetati ametisse juhatus ja büroo direktor. Foorumi üheks kaasesimeheks valiti Ando Leps. Autor: Keskerakond. Parlamendisaadik

  18. Globaliseeruv kuritegevus ja terror / Ando Leps

    Index Scriptorium Estoniae

    Leps, Ando, 1935-

    2002-01-01

    29. märtsil moodustati Riias ülemaailmsel kuritegevuse- ja terrorismivastasel foorumil Läänemerega piirnevate riikide Kuritegevuse- ja Terrorismivastane Foorum. Võeti vastu põhikiri, nimetati ametisse juhatus ja büroo direktor. Foorumi üheks kaasesimeheks valiti Ando Leps. Autor: Keskerakond. Parlamendisaadik

  19. Production of excited charmed mesons at LEP

    CERN Document Server

    Abbaneo, D

    2000-01-01

    Studies od the production of orbitally excited charmed and charmed strange mesons in e+e- collisions, performed by the LEP collaborations are reviewed. Measurements of the production rates of orbitally excited charmed mesons in semileptonic b decays are presented. Searches for charmed meson radial excitations are also briefly discussed.

  20. Semileptonic b branching fractions at LEP

    CERN Document Server

    Gagnon, P

    2000-01-01

    I review recent results on semileptonic branching fractions at LEP for Z/sup 0/ to bb data, for the average b hadron then for b baryons. From the inclusive BR(b to lX), one can obtain the most precise value for the CKM matrix element V/sub cb/. (14 refs).

  1. Fermion pair physics at LEP2

    International Nuclear Information System (INIS)

    Georgios, Anagnostou

    2004-01-01

    Combined measurements of the 4 LEP collaborations for the fermion pair processes e + e - →f anti f are presented. The results show no significant deviations when compared with the Standard Model predictions and are used to set limits on contact interactions, Z' gauge bosons and low scale gravity models with large extra dimensions. (orig.)

  2. Colour reconnection in DELPHI at LEP

    International Nuclear Information System (INIS)

    Abreu, P.

    2003-01-01

    The preliminary results of two different methods for the search of colour reconnection effects (CR), used in the DELPHI experiment at LEP are presented. The methods were found to be largely uncorrelated, and a combined likelihood for values of the κ strength parameter in the SK-I model is given

  3. Differential Effects of Learning Games on Mathematics Proficiency

    Science.gov (United States)

    Chang, Mido; Evans, Michael A.; Kim, Sunha; Norton, Anderson; Samur, Yavuz

    2015-01-01

    This study examined the effects of a learning game, [The Math App] on the mathematics proficiency of middle school students. For the study, researchers recruited 306 students, Grades 6-8, from two schools in rural southwest Virginia. Over a nine-week period, [The Math App] was deployed as an intervention for investigation. Students were assigned…

  4. Diffusion of Cardiopulmonary Resuscitation Training to Chinese Immigrants with Limited English Proficiency

    Directory of Open Access Journals (Sweden)

    Mei Po Yip

    2011-01-01

    Full Text Available Cardiopulmonary resuscitation (CPR is an effective intervention for prehospital cardiac arrest. Despite all available training opportunities for CPR, disparities exist in participation in CPR training, CPR knowledge, and receipt of bystander CPR for certain ethnic groups. We conducted five focus groups with Chinese immigrants who self-reported limited English proficiency (LEP. A bilingual facilitator conducted all the sessions. All discussions were taped, recorded, translated, and transcribed. Transcripts were analyzed by content analysis guided by the theory of diffusion. The majority of participants did not know of CPR and did not know where to get trained. Complexity of CPR procedure, advantages of calling 9-1-1, lack of confidence, and possible liability discourage LEP individuals to learn CPR. LEP individuals welcome simplified Hands-Only CPR and are willing to perform CPR with instruction from 9-1-1 operators. Expanding the current training to include Hands-Only CPR and dispatcher-assisted CPR may motivate Chinese LEP individuals to get trained for CPR.

  5. Polarization at LEP: Status and prospects

    International Nuclear Information System (INIS)

    Koutchouk, J.P.

    1993-01-01

    The first evidence of a measurable signal of transverse polarization was observed at the end of 1990. In 1991, polarized beams were repeatedly obtained with average and peak polarization levels of 10 and 19% and used to calibrate the beam energy by resonant depolarization. Simulation studies show that the polarization level can be increased above the 50% by harmonic spin matching. This is sufficient to open the possibility of doing physics with longitudinally polarized beams. A spin rotator has been designed for LEP. The feasibility study of operating LEP in this mode concludes at the possibility of providing polarized beams at a good performance level, if the high photon background can be reduced to a tolerable level. (author). 10 refs, 3 figs, 5 tabs

  6. section of an accelerating cavity from LEP

    CERN Multimedia

    This is a section of an accelerating cavity from LEP, cut in half to show the layer of niobium on the inside. Operating at 4.2 degrees above absolute zero, the niobium is superconducting and carries an accelerating field of 6 million volts per metre with negligible losses. Each cavity has a surface of 6 m2. The niobium layer is only 1.2 microns thick, ten times thinner than a hair. Such a large area had never been coated to such a high accuracy. A speck of dust could ruin the performance of the whole cavity so the work had to be done in an extremely clean environment. These challenging requirements pushed European industry to new achievements. 256 of these cavities are now used in LEP to double the energy of the particle beams.

  7. Language Learning Strategies and English Proficiency: Interpretations from Information-Processing Theory

    Science.gov (United States)

    Rao, Zhenhui

    2016-01-01

    The research reported here investigated the relationship between students' use of language learning strategies and their English proficiency, and then interpreted the data from two models in information-processing theory. Results showed that the students' English proficiency significantly affected their use of learning strategies, with high-level…

  8. Search for Excited Leptons at LEP

    CERN Document Server

    Achard, P.; Aguilar-Benitez, M.; Alcaraz, J.; Alemanni, G.; Allaby, J.; Aloisio, A.; Alviggi, M.G.; Anderhub, H.; Andreev, Valery P.; Anselmo, F.; Arefev, A.; Azemoon, T.; Aziz, T.; Bagnaia, P.; Bajo, A.; Baksay, G.; Baksay, L.; Baldew, S.V.; Banerjee, S.; Banerjee, Sw.; Barczyk, A.; Barillere, R.; Bartalini, P.; Basile, M.; Batalova, N.; Battiston, R.; Bay, A.; Becattini, F.; Becker, U.; Behner, F.; Bellucci, L.; Berbeco, R.; Berdugo, J.; Berges, P.; Bertucci, B.; Betev, B.L.; Biasini, M.; Biglietti, M.; Biland, A.; Blaising, J.J.; Blyth, S.C.; Bobbink, G.J.; Bohm, A.; Boldizsar, L.; Borgia, B.; Bottai, S.; Bourilkov, D.; Bourquin, M.; Braccini, S.; Branson, J.G.; Brochu, F.; Burger, J.D.; Burger, W.J.; Cai, X.D.; Capell, M.; Cara Romeo, G.; Carlino, G.; Cartacci, A.; Casaus, J.; Cavallari, F.; Cavallo, N.; Cecchi, C.; Cerrada, M.; Chamizo, M.; Chang, Y.H.; Chemarin, M.; Chen, A.; Chen, G.; Chen, G.M.; Chen, H.F.; Chen, H.S.; Chiefari, G.; Cifarelli, L.; Cindolo, F.; Clare, I.; Clare, R.; Coignet, G.; Colino, N.; Costantini, S.; de la Cruz, B.; Cucciarelli, S.; van Dalen, J.A.; de Asmundis, R.; Deglon, P.; Debreczeni, J.; Degre, A.; Dehmelt, K.; Deiters, K.; della Volpe, D.; Delmeire, E.; Denes, P.; DeNotaristefani, F.; De Salvo, A.; Diemoz, M.; Dierckxsens, M.; Dionisi, C.; Dittmar, M.; Doria, A.; Dova, M.T.; Duchesneau, D.; Duda, M.; Echenard, B.; Eline, A.; El Hage, A.; El Mamouni, H.; Engler, A.; Eppling, F.J.; Extermann, P.; Falagan, M.A.; Falciano, S.; Favara, A.; Fay, J.; Fedin, O.; Felcini, M.; Ferguson, T.; Fesefeldt, H.; Fiandrini, E.; Field, J.H.; Filthaut, F.; Fisher, P.H.; Fisher, W.; Fisk, I.; Forconi, G.; Freudenreich, K.; Furetta, C.; Galaktionov, Iouri; Ganguli, S.N.; Garcia-Abia, Pablo; Gataullin, M.; Gentile, S.; Giagu, S.; Gong, Z.F.; Grenier, Gerald Jean; Grimm, O.; Gruenewald, M.W.; Guida, M.; van Gulik, R.; Gupta, V.K.; Gurtu, A.; Gutay, L.J.; Haas, D.; Hakobyan, R.S.; Hansen, J.M.; Hatzifotiadou, D.; Hebbeker, T.; Herve, Alain; Hirschfelder, J.; Hofer, H.; Hohlmann, M.; Holzner, G.; Hou, S.R.; Hu, Y.; Jin, B.N.; Jones, Lawrence W.; de Jong, P.; Josa-Mutuberria, I.; Kafer, D.; Kaur, M.; Kienzle-Focacci, M.N.; Kim, J.K.; Kirkby, Jasper; Kittel, W.; Klimentov, A.; Konig, A.C.; Kopal, M.; Koutsenko, V.; Kraber, M.; Kraemer, R.W.; Kruger, A.; Kunin, A.; Ladron de Guevara, P.; Laktineh, I.; Landi, G.; Lebeau, M.; Lebedev, A.; Lebrun, P.; Lecomte, P.; Lecoq, P.; Le Coultre, P.; Le Goff, J.M.; Leiste, R.; Levtchenko, M.; Levtchenko, P.; Li, C.; Likhoded, S.; Lin, C.H.; Lin, W.T.; Linde, F.L.; Lista, L.; Liu, Z.A.; Lohmann, W.; Longo, E.; Lu, Y.S.; Luci, C.; Luminari, L.; Lustermann, W.; Ma, W.G.; Malgeri, L.; Malinin, A.; Mana, C.; Mans, J.; Martin, J.P.; Marzano, F.; Mazumdar, K.; McNeil, R.R.; Mele, S.; Merola, L.; Meschini, M.; Metzger, W.J.; Mihul, A.; Milcent, H.; Mirabelli, G.; Mnich, J.; Mohanty, G.B.; Muanza, G.S.; Muijs, A.J.M.; Musicar, B.; Musy, M.; Nagy, S.; Natale, S.; Napolitano, M.; Nessi-Tedaldi, F.; Newman, H.; Nisati, A.; Kluge, Hannelies; Ofierzynski, R.; Organtini, G.; Pal, I.; Palomares, C.; Paolucci, P.; Paramatti, R.; Passaleva, G.; Patricelli, S.; Paul, Thomas Cantzon; Pauluzzi, M.; Paus, C.; Pauss, F.; Pedace, M.; Pensotti, S.; Perret-Gallix, D.; Petersen, B.; Piccolo, D.; Pierella, F.; Pioppi, M.; Piroue, P.A.; Pistolesi, E.; Plyaskin, V.; Pohl, M.; Pojidaev, V.; Pothier, J.; Prokofev, D.; Quartieri, J.; Rahal-Callot, G.; Rahaman, Mohammad Azizur; Raics, P.; Raja, N.; Ramelli, R.; Rancoita, P.G.; Ranieri, R.; Raspereza, A.; Razis, P.; Ren, D.; Rescigno, M.; Reucroft, S.; Riemann, S.; Riles, Keith; Roe, B.P.; Romero, L.; Rosca, A.; Rosier-Lees, S.; Roth, Stefan; Rosenbleck, C.; Rubio, J.A.; Ruggiero, G.; Rykaczewski, H.; Sakharov, A.; Saremi, S.; Sarkar, S.; Salicio, J.; Sanchez, E.; Schafer, C.; Schegelsky, V.; Schopper, H.; Schotanus, D.J.; Sciacca, C.; Servoli, L.; Shevchenko, S.; Shivarov, N.; Shoutko, V.; Shumilov, E.; Shvorob, A.; Son, D.; Souga, C.; Spillantini, P.; Steuer, M.; Stickland, D.P.; Stoyanov, B.; Straessner, A.; Sudhakar, K.; Sultanov, G.; Sun, L.Z.; Sushkov, S.; Suter, H.; Swain, J.D.; Szillasi, Z.; Tang, X.W.; Tarjan, P.; Tauscher, L.; Taylor, L.; Tellili, B.; Teyssier, D.; Timmermans, Charles; Ting, Samuel C.C.; Ting, S.M.; Tonwar, S.C.; Toth, J.; Tully, C.; Tung, K.L.; Ulbricht, J.; Valente, E.; Van de Walle, R.T.; Vasquez, R.; Veszpremi, V.; Vesztergombi, G.; Vetlitsky, I.; Vicinanza, D.; Viertel, G.; Villa, S.; Vivargent, M.; Vlachos, S.; Vodopianov, I.; Vogel, H.; Vogt, H.; Vorobev, I.; Vorobyov, A.A.; Wadhwa, M.; Wang, Q.; Wang, X.L.; Wang, Z.M.; Weber, M.; Wienemann, P.; Wilkens, H.; Wynhoff, S.; Xia, L.; Xu, Z.Z.; Yamamoto, J.; Yang, B.Z.; Yang, C.G.; Yang, H.J.; Yang, M.; Yeh, S.C.; Zalite, A.; Zalite, Yu.; Zhang, Z.P.; Zhao, J.; Zhu, G.Y.; Zhu, R.Y.; Zhuang, H.L.; Zichichi, A.; Zimmermann, B.; Zoller, M.

    2003-01-01

    A search for charged and neutral excited leptons is performed in 217 pb-1 of data collected with the L3 detector at LEP at centre-of-mass energies up to 209 GeV. The pair- and single-production mechanisms are investigated and no signals are detected. Combining with L3 results from searches at lower centre-of-mass energies, gives improved limits on the masses and couplings of excited leptons.

  9. $l l \\gamma \\gamma$ events at LEP

    CERN Document Server

    Chang, Yuan-Hann

    1993-01-01

    The results of studies on the ef.7-y events with high 'Y'Y mass from the L3 experiment at LEP is reported. A clustering of events with 'Y'Y invariant mass around 60 GeV is observed. The clustering could come from decay of a heavy particle, however, QED fluctuation cannot be ruled out. More data are needed to ascertain the origin of these events.

  10. Searches for new particles at LEP

    International Nuclear Information System (INIS)

    Jimack, M.P.

    1991-01-01

    A review of searches for new particles at LEP is presented, including top b' quark searches; L ± , L 0 searches; searches for SUSY particles, the minimal standard mode Higgs boson; search for the h 0 (A 0 ); search for the H ± ; composite systems. No evidence for new physics has been seen, and mass limits are placed on new quarks and leptons, supersymmetric particles, Higgs particles and composite objects. (R.P.) 27 refs., 14 figs., 7 tabs

  11. A very light Higgs at LEP

    International Nuclear Information System (INIS)

    Brown, N.

    1990-01-01

    If the standard Higgs particle is very light (≤50 MeV) then it will be sufficiently long lived that it could decay outside the detectors at LEP. This could give a signal of two final state leptons which are not back-to-back, with missing transverse momentum. We show that with suitable cuts this Higgs signal can be distinguished from backgrounds with a large enough rate that such a light Higgs will either be discovered or completely ruled out. (author)

  12. The η6 at LEP and TRISTAN

    International Nuclear Information System (INIS)

    Kang, K.

    1993-01-01

    The η 6 is a open-quotes heavy axionclose quotes remnant of dynamical electroweak symmetry breaking by a color sextet quark condensate. Electroweak scale color instanton interactions allow it to be both very massive and yet be responsible for Strong CP conservation in the color triplet quark sector. It may have been seen at LEP via its two-photon decay mode and at TRISTAN via its hadronic decay modes

  13. CERN: A big year for LEP

    International Nuclear Information System (INIS)

    Anon.

    1991-01-01

    In April this year's data-taking period for CERN's big LEP electron-positron collider got underway, and is scheduled to continue until November. The immediate objective of the four big experiments - Aleph, Delphi, L3 and Opal - will be to increase considerably their stock of carefully recorded Z decays, currently totalling about three-quarters of a million

  14. Study of electroweak parameters at LEP

    International Nuclear Information System (INIS)

    Blum, W.

    1991-10-01

    The measurement of the line shape and asymmetry parameters of the Z 0 in its leptonic and hadronic decays are reviewed. Progress is reported about a considerable increase in measurement accuracy. Several tests of the Standard Model confirm it to better than one per cent. New values for the effective mixing parameter are derived from the line shape parameters averaged over the four LEP experiments. The corresponding limits on the top mass are presented. (orig.)

  15. The English Proficiency of the Academics of the Teacher Training and Education Institutions

    Directory of Open Access Journals (Sweden)

    Ali Saukah

    2016-02-01

    Full Text Available The study is aimed at describing the general English proficiency level of the academics of Teacher Training and Education Institutions (LPTK's as indicated by their TOEFL scores. Specifically, the study is focused on finding out whether there is any difference among the academics' English proficiencies when they are grouped in terms of the geographic regions of their institutions and their fields of study. This study is also intended to reveal any possible relationship between the academics' English proficiency and their age. The results indicate that the English proficiency of the academics on the average is far below the average of that of the international students. The academics in West Java are the highest in their English proficiency, and the English group, as expected, has the best English proficiency. In addition, there is a negative correlation between English proficiency and age

  16. Testing the tau lepton universality at LEP

    CERN Document Server

    Dittmar, M

    1991-01-01

    Measurements of r lepton production and its decay properties at LEP are reviewed and compared with the corresponding µ results. Excellent agreement of lepton universality in z0 decays has been found, taking the average values from the four LEP experiments, the ratio of the partial width for z0 decays into r- and µ pairs is 0.996 ± 0.016. The search for flavour changing leptonic z0 decays is discussed; from the absence of any signal, stringent limits (95% c.l.) of the zo branching ratio of 7.2 x 10-5 and 35 x io-5 were obtained for z0 decays into er and µr. The first preliminary results on leptonic r branching ratios are in good agreement with the world average. Therefore the existing two sigma puzzle, the too small leptonic branching ratio or the too long r lifetime, remains. These first results indicate also that much higher precision should be achieved during the next years of LEP, sufficient to establish or resolve this problem. Finally, the r polarisation measurements are compared. The most accurate m...

  17. LEP Dismantling Reaches Half-Way Stage

    CERN Multimedia

    2001-01-01

    LEP's last superconducting module leaves its home port... Just seven months into the operation, LEP dismantling is forging ahead. Two of the eight arcs which form the tunnel have already been emptied and the last of the accelerator's radiofrequency (RF) cavities has just been raised to the surface. The 160 people working on LEP dismantling have reason to feel pleased with their progress. All of the accelerator's 72 superconducting RF modules have already been brought to the surface, with the last one being extracted on 2nd May. This represents an important step in the dismantling process, as head of the project, John Poole, explains. 'This was the most delicate part of the project, because the modules are very big and they could only come out at one place', he says. The shaft at point 1.8 through which the RF cavity modules pass is 18 metres in diameter, while each module is 11.5 metres long. Some modules had to travel more than 10 kilometres to reach the shaft. ... is lifted up the PM 1.8 shaft, after a m...

  18. LEP shines light on dark matter

    International Nuclear Information System (INIS)

    Fox, Patrick J.; Harnik, Roni; Kopp, Joachim; Tsai, Yuhsin

    2011-01-01

    Dark matter pair production at high energy colliders may leave observable signatures in the energy and momentum spectra of the objects recoiling against the dark matter. We use LEP data on monophoton events with large missing energy to constrain the coupling of dark matter to electrons. Within a large class of models, our limits are complementary to and competitive with limits on dark matter annihilation and on WIMP-nucleon scattering from indirect and direct searches. Our limits, however, do not suffer from systematic and astrophysical uncertainties associated with direct and indirect limits. For example, we are able to rule out light (< or approx. 10 GeV) thermal relic dark matter with universal couplings exclusively to charged leptons. In addition, for dark matter mass below about 80 GeV, LEP limits are stronger than Fermi constraints on annihilation into charged leptons in dwarf spheroidal galaxies. Within its kinematic reach, LEP also provides the strongest constraints on the spin-dependent direct detection cross section in models with universal couplings to both quarks and leptons. In such models the strongest limit is also set on spin-independent scattering for dark matter masses below ∼4 GeV. Throughout our discussion, we consider both low energy effective theories of dark matter, as well as several motivated renormalizable scenarios involving light mediators.

  19. The radiological impact of the LEP project on the environment

    International Nuclear Information System (INIS)

    Goebel, K.

    1981-01-01

    The siting of the large electron-positron (LEP) accelerator, its experimental areas, and its supporting infrastructure are discussed with respect to the radiological impact on the surrounding areas and on the population in the Pays de Gex and the Canton de Geneve. The final conclusions are based on work done by the former LEP Study Group and by the LEP Radiation Working Group. The calculations and estimates show that the stray ionizing radiation, the radioactivity, and the radiation-induced noxious chemical products released by the LEP installation will have only an insignificant impact on the area, the individual members of the public, and the population as a whole. This result for LEP 'phase 85' can also be extrapolated under reasonable assumptions for LEP 125 - a possible future development phase of the present project. (orig.)

  20. Strongly coupled SU(2v boson and LEP1 versus LEP2

    Directory of Open Access Journals (Sweden)

    M. Bilenky

    1993-10-01

    Full Text Available If new strong interactions exist in the electroweak bosonic sector (e.g., strong Higgs sector, dynamical electroweak breaking, etc., it is natural to expect new resonances, with potentially strong couplings. We consider an additional vector-boson triplet, V+-, V0, associated with an SU(2v local symmetry under the specific (but rather natural assumption that ordinary fermions are SU(2v singlets. Mixing of the V triplet with the W+-, Z0 bosons effectively leads to an SU(2L×U(1Y violating vector-boson-fermion interaction which is strongly bounded by LEP1 data. In contrast, the potentially large deviation of the Z0W+W- coupling from its SU(2L×U(1Y value is hardly constrained by LEP1 data. Results from experiments with direct access to the trilinear Z0W+W− coupling (LEP200, NLC are urgently needed.

  1. Around the laboratories: CERN: LEP in the Alps; Putting four LEP experiments together; Heavier ions

    International Nuclear Information System (INIS)

    Anon.

    1992-01-01

    With CERN's 27-kilometre LEP electron-positron collider shut down for the winter, LEP specialists met in Chamonix in the French Alps from 19-25 January to review the machine's 1991 performance and to look at the ways of improving it. ; Since they started taking data in August 1989, the four big LEP experiments - Aleph, Delphi, L3 and Opal - have been providing precision information about the Z particle, the electrically neutral carrier of the weak nuclear force and at 91 GeV the heavisest elementary particle known.; Work by a major international collaboration is progressing well for a new heavy ion system, capable of providing experiments at CERN with a wide range of heavy ions, extending up to the heaviest elements in the Periodic Table. First beams should be available in 1994

  2. LEP Electroweak and QCD Exhibition Lepton-Photon 2001

    CERN Multimedia

    2001-01-01

    The LEP collider an at centre-of-mass energies around the Z mass from 1989 to 1995 (LEP1).F om 1995 to 2000 (LEP2),the energy was gradually increased, crossing the W-pair production threshold in 1996,and eaching 208 GeV in 2000. Each of the four experiments,ALEPH,DELPHI,L3 and OPAL,observed around 4.5 million Z and 12 thousand W-pair events.

  3. Pouring concrete to form a model LEP dipole yoke

    CERN Multimedia

    1979-01-01

    The magnetic field needed in the LEP dipole magnets was rather low, of a fraction of tesla. This lead to the conception of a novel yoke structure consisting of stacks of 1.5 mm thick low-carbon steel laminations spaced by 4.1 mm with the spaces filled with concrete. For details see LEP-Note 118,1978 and LEP-Note 233,1980. See also 8111529, 8111710X, 7901023X,7908294

  4. Premiers résultats en provenance du LEP2

    CERN Multimedia

    CERN Press Office. Geneva

    1996-01-01

    CERN's Large Electron-Positron collider, LEP, produced its first pair of fundamental particles known as W+ and W- today, taking particle physics research into new and unexplored territory. This follows a busy winter of upgrades which have transformed LEP into a new accelerator, earning it the name LEP2. Hundreds of physicists from all over the world come to CERN to do their research at LEP2, which will be further upgraded over the coming years, bringing the possibility of new discoveries and extending our understanding of the Universe.

  5. Southeast Asian Languages Proficiency Examinations.

    Science.gov (United States)

    Brown, James Dean; And Others

    The design, administration, revision, and validation of the Southeast Asian Summer Studies Institute proficiency examinations are reported. The examinations were created as parallel language proficiency tests in each of five languages: Indonesian, Khmer, Tagalog, Thai, and Vietnamese. Four tests were developed in each language: multiple-choice…

  6. Clinical Wisdom among Proficient Nurses

    DEFF Research Database (Denmark)

    Uhrenfeldt, Lisbeth; Hall, Elisabeth

    2007-01-01

    This paperexamines clinical wisdom which has emerged from a broader study anout nurse managers´influence on proficient registered nurse turnover and retention. The purpose of the study was to increase understanding of proficient nurses´experience and clinical practice by giving voice to the nurses...

  7. Trends in Teacher Certification: Equipping Teachers to Prepare Proficient Readers

    Science.gov (United States)

    Rowland, Julie

    2015-01-01

    Ensuring that students are reading proficiently by third grade is a key component of keeping students on track to graduate high school and pursue college and careers. Because of the magnitude of this academic milestone, states typically pursue policies that promote early identification and intervention for struggling readers. However, teachers are…

  8. Verb-Noun Collocation Proficiency and Academic Years

    Directory of Open Access Journals (Sweden)

    Fatemeh Ebrahimi-Bazzaz

    2014-01-01

    Full Text Available Generally vocabulary and collocations in particular have significant roles in language proficiency. A collocation includes two words that are frequently joined concurrently in the memory of native speakers. There have been many linguistic studies trying to define, to describe, and to categorise English collocations. It contains grammatical collocations and lexical collocations which include nouns, adjectives, verbs, and adverb. In the context of a foreign language environment such as Iran, collocational proficiency can be useful because it helps the students improve their language proficiency. This paper investigates the possible relationship between verb-noun collocation proficiency among students from one academic year to the next. To reach this goal, a test of verb-noun collocations was administered to Iranian learners. The participants in the study were 212 Iranian students in an Iranian university. They were selected from the second term of freshman, sophomore, junior, and senior years. The students’ age ranged from 18 to 35.The results of ANOVA showed there was variability in the verb-noun collocations proficiency within each academic year and between the four academic years. The results of a post hoc multiple comparison tests demonstrated that the means are significantly different between the first year and the third and fourth years, and between the third and the fourth academic year; however, students require at least two years to show significant development in verb-noun collocation proficiency. These findings provided a vital implication that lexical collocations are learnt and developed through four academic years of university, but requires at least two years showing significant development in the language proficiency.

  9. LEP constraints on grand unified theories

    International Nuclear Information System (INIS)

    Sarkar, Utpal

    1993-01-01

    Recent developments on grand unified theories (GUTs) in the context of the LEP measurements of the coupling constants are reviewed. The three coupling constants at the electroweak scale have been measured at LEP quite precisely. One can allow these couplings to evolve with energy following the renormalization group equations for the various groups and find out whether all the coupling constants meet at any energy. It was pointed out that the minimal SU(5) grand unified theory fails to satisfy this test. However, various extensions of the theory are still allowed. These extensions include (i) supersymmetric SU(5) GUT, with some arbitrariness in the susy breaking scale arising from the threshold corrections, (ii) non-susy SU(5) GUTs with additional fermions as well as Higgs multiplets, which has masses of the order of TeV, and (iii) non-renormalizable effect of gravity with a fine tuned relation among the coupling constants at the unification energy. The LEP results also constrain GUTs with an intermediate symmetry breaking scale. By adjusting the intermediate symmetry breaking scale, one usually can have unification, but these theories get constrained. For example, the left-right symmetric theories coming from GUTs can be broken only at energies higher than about ∼10 10 GeV. This implies that if right handed gauge bosons are found at energies lower than this scale, then that will rule out the possibility of grand unification. Another recent interesting development on the subject, namely, low energy unification, is discussed in this context. All the coupling constants are unified at energies of the order of ∼10 8 GeV when they are embedded in an SU(15)GUT, with some particular symmetry breaking pattern. But even in this case the results of the intermediate symmetry breaking scale remain unchanged. (author). 16 refs., 3 figs

  10. Search for Single Top Production at LEP

    CERN Document Server

    Achard, P; Aguilar-Benítez, M; Alcaraz, J; Alemanni, G; Allaby, James V; Aloisio, A; Alviggi, M G; Anderhub, H; Andreev, V P; Anselmo, F; Arefev, A; Azemoon, T; Aziz, T; Bagnaia, P; Bajo, A; Baksay, G; Baksay, L; Baldew, S V; Banerjee, S; Banerjee, Sw; Barczyk, A; Barillère, R; Bartalini, P; Basile, M; Batalova, N; Battiston, R; Bay, A; Becattini, F; Becker, U; Behner, F; Bellucci, L; Berbeco, R; Berdugo, J; Berges, P; Bertucci, B; Betev, B L; Biasini, M; Biglietti, M; Biland, A; Blaising, J J; Blyth, S C; Bobbink, Gerjan J; Böhm, A; Boldizsar, L; Borgia, B; Bottai, S; Bourilkov, D; Bourquin, Maurice; Braccini, S; Branson, J G; Brochu, F; Burger, J D; Burger, W J; Cai, X D; Capell, M; Cara Romeo, G; Carlino, G; Cartacci, A M; Casaus, J; Cavallari, F; Cavallo, N; Cecchi, C; Cerrada, M; Chamizo-Llatas, M; Chang, Y H; Chemarin, M; Chen, A; Chen, G; Chen, G M; Chen, H F; Chen, H S; Chiefari, G; Cifarelli, Luisa; Cindolo, F; Clare, I; Clare, R; Coignet, G; Colino, N; Costantini, S; de la Cruz, B; Cucciarelli, S; van Dalen, J A; De Asmundis, R; Déglon, P L; Debreczeni, J; Degré, A; Dehmelt, K; Deiters, K; Della Volpe, D; Delmeire, E; Denes, P; De Notaristefani, F; De Salvo, A; Diemoz, M; Dierckxsens, M; Dionisi, C; Dittmar, M; Doria, A; Dova, M T; Duchesneau, D; Echenard, B; Eline, A; El-Mamouni, H; Engler, A; Eppling, F J; Ewers, A; Extermann, P; Falagán, M A; Falciano, S; Favara, A; Fay, J; Fedin, O; Felcini, M; Ferguson, T; Fesefeldt, H S; Fiandrini, E; Field, J H; Filthaut, Frank; Fisher, P H; Fisher, W; Fisk, I; Forconi, G; Freudenreich, Klaus; Furetta, C; Galaktionov, Yu; Ganguli, S N; García-Abia, P; Gataullin, M; Gentile, S; Giagu, S; Gong, Z F; Grenier, G; Grimm, O; Grünewald, M W; Guida, M; van Gulik, R; Gupta, V K; Gurtu, A; Gutay, L J; Haas, D; Hakobyan, R S; Hatzifotiadou, D; Hebbeker, T; Hervé, A; Hirschfelder, J; Hofer, H; Hohlmann, M; Holzner, G; Hou, S R; Hu, Y; Jin, B N; Jones, L W; de Jong, P; Josa-Mutuberria, I; Käfer, D; Kaur, M; Kienzle-Focacci, M N; Kim, J K; Kirkby, Jasper; Kittel, E W; Klimentov, A; König, A C; Kopal, M; Koutsenko, V F; Kräber, M H; Krämer, R W; Krenz, W; Krüger, A; Kunin, A; Ladrón de Guevara, P; Laktineh, I; Landi, G; Lebeau, M; Lebedev, A; Lebrun, P; Lecomte, P; Lecoq, P; Le Coultre, P; Le Goff, J M; Leiste, R; Levtchenko, M; Levchenko, P M; Li, C; Likhoded, S A; Lin, C H; Lin, W T; Linde, Frank L; Lista, L; Liu, Z A; Lohmann, W; Longo, E; Lü, Y S; Lübelsmeyer, K; Luci, C; Luminari, L; Lustermann, W; Ma Wen Gan; Malgeri, L; Malinin, A; Maña, C; Mangeol, D J J; Mans, J; Martin, J P; Marzano, F; Mazumdar, K; McNeil, R R; Mele, S; Merola, L; Meschini, M; Metzger, W J; Mihul, A; Milcent, H; Mirabelli, G; Mnich, J; Mohanty, G B; Muanza, G S; Muijs, A J M; Musicar, B; Musy, M; Nagy, S; Natale, S; Napolitano, M; Nessi-Tedaldi, F; Newman, H; Niessen, T; Nisati, A; Nowak, H; Ofierzynski, R A; Organtini, G; Palomares, C; Pandoulas, D; Paolucci, P; Paramatti, R; Passaleva, G; Patricelli, S; Paul, T; Pauluzzi, M; Paus, C; Pauss, Felicitas; Pedace, M; Pensotti, S; Perret-Gallix, D; Petersen, B; Piccolo, D; Pierella, F; Pioppi, M; Piroué, P A; Pistolesi, E; Plyaskin, V; Pohl, M; Pozhidaev, V; Pothier, J; Prokofiev, D O; Prokofev, D; Quartieri, J; Rahal-Callot, G; Rahaman, M A; Raics, P; Raja, N; Ramelli, R; Rancoita, P G; Ranieri, R; Raspereza, A V; Razis, P A; Ren, D; Rescigno, M; Reucroft, S; Riemann, S; Riles, K; Roe, B P; Romero, L; Rosca, A; Rosier-Lees, S; Roth, S; Rosenbleck, C; Roux, B; Rubio, Juan Antonio; Ruggiero, G; Rykaczewski, H; Sakharov, A; Saremi, S; Sarkar, S; Salicio, J; Sánchez, E; Sanders, M P; Schäfer, C; Shchegelskii, V; Schmidt-Kärst, S; Schmitz, D; Schopper, Herwig Franz; Schotanus, D J; Schwering, G; Sciacca, C; Servoli, L; Shevchenko, S; Shivarov, N; Shoutko, V; Shumilov, E; Shvorob, A V; Siedenburg, T; Son, D; Souga, C; Spillantini, P; Steuer, M; Stickland, D P; Stoyanov, B; Strässner, A; Sudhakar, K; Sultanov, G G; Sun, L Z; Sushkov, S V; Suter, H; Swain, J D; Szillási, Z; Tang, X W; Tarjan, P; Tauscher, Ludwig; Taylor, L; Tellili, B; Teyssier, D; Timmermans, C; Ting, Samuel C C; Ting, S M; Tonwar, S C; Tóth, J; Tully, C; Tung, K L; Ulbricht, J; Valente, E; Van de Walle, R T; Vásquez, R P; Veszpremi, V; Vesztergombi, G; Vetlitskii, I; Vicinanza, D; Viertel, Gert M; Villa, S; Vivargent, M; Vlachos, S; Vodopyanov, I; Vogel, H; Vogt, H; Vorobev, I; Vorobyov, A A; Wadhwa, M; Wallraff, W; Wang, X L; Wang, Z M; Weber, M; Wienemann, P; Wilkens, H; Wynhoff, S; Xia, L; Xu, Z Z; Yamamoto, J; Yang, B Z; Yang, C G; Yang, H J; Yang, M; Yeh, S C; Zalite, A; Zalite, Yu; Zhang, Z P; Zhao, J; Zhu, G Y; Zhu, R Y; Zhuang, H L; Zichichi, A; Zimmermann, B; Zöller, M

    2002-01-01

    Single top production in e^+e^- annihilations is searched for in data collected by the L3 detector at centre-of-mass energies from 189 to 209 GeV, corresponding to a total integrated luminosity of 634 pb-1. Investigating hadronic and semileptonic top decays, no evidence of single top production at LEP is obtained and upper limits on the single top cross section as a function of the centre-of-mass energy are derived. Limits on possible anomalous couplings, as well as on the scale of contact interactions responsible for single top production are determined.

  11. Search for Charged Higgs Bosons at LEP

    CERN Document Server

    Achard, P.; Aguilar-Benitez, M.; Alcaraz, J.; Alemanni, G.; Allaby, J.; Aloisio, A.; Alviggi, M.G.; Anderhub, H.; Andreev, Valery P.; Anselmo, F.; Arefev, A.; Azemoon, T.; Aziz, T.; Bagnaia, P.; Bajo, A.; Baksay, G.; Baksay, L.; Baldew, S.V.; Banerjee, S.; Barczyk, A.; Barillere, R.; Bartalini, P.; Basile, M.; Batalova, N.; Battiston, R.; Bay, A.; Becattini, F.; Becker, U.; Behner, F.; Bellucci, L.; Berbeco, R.; Berdugo, J.; Berges, P.; Bertucci, B.; Betev, B.L.; Biasini, M.; Biglietti, M.; Biland, A.; Blaising, J.J.; Blyth, S.C.; Bobbink, G.J.; Bohm, A.; Boldizsar, L.; Borgia, B.; Bottai, S.; Bourilkov, D.; Bourquin, M.; Braccini, S.; Branson, J.G.; Brochu, F.; Burger, J.D.; Burger, W.J.; Cai, X.D.; Capell, M.; Cara Romeo, G.; Carlino, G.; Cartacci, A.; Casaus, J.; Cavallari, F.; Cavallo, N.; Cecchi, C.; Cerrada, M.; Chamizo, M.; Chang, Y.H.; Chemarin, M.; Chen, A.; Chen, G.; Chen, G.M.; Chen, H.F.; Chen, H.S.; Chiefari, G.; Cifarelli, L.; Cindolo, F.; Clare, I.; Clare, R.; Coignet, G.; Colino, N.; Costantini, S.; de la Cruz, B.; Cucciarelli, S.; van Dalen, J.A.; de Asmundis, R.; Deglon, P.; Debreczeni, J.; Degre, A.; Dehmelt, K.; Deiters, K.; della Volpe, D.; Delmeire, E.; Denes, P.; DeNotaristefani, F.; De Salvo, A.; Diemoz, M.; Dierckxsens, M.; Dionisi, C.; Dittmar, M.; Doria, A.; Dova, M.T.; Duchesneau, D.; Duda, M.; Echenard, B.; Eline, A.; El Hage, A.; El Mamouni, H.; Engler, A.; Eppling, F.J.; Extermann, P.; Falagan, M.A.; Falciano, S.; Favara, A.; Fay, J.; Fedin, O.; Felcini, M.; Ferguson, T.; Fesefeldt, H.; Fiandrini, E.; Field, J.H.; Filthaut, F.; Fisher, P.H.; Fisher, W.; Fisk, I.; Forconi, G.; Freudenreich, K.; Furetta, C.; Galaktionov, Iouri; Ganguli, S.N.; Garcia-Abia, Pablo; Gataullin, M.; Gentile, S.; Giagu, S.; Gong, Z.F.; Grenier, Gerald Jean; Grimm, O.; Gruenewald, M.W.; Guida, M.; van Gulik, R.; Gupta, V.K.; Gurtu, A.; Gutay, L.J.; Haas, D.; Hatzifotiadou, D.; Hebbeker, T.; Herve, Alain; Hirschfelder, J.; Hofer, H.; Hohlmann, M.; Holzner, G.; Hou, S.R.; Hu, Y.; Jin, B.N.; Jones, Lawrence W.; de Jong, P.; Josa-Mutuberria, I.; Kafer, D.; Kaur, M.; Kienzle-Focacci, M.N.; Kim, J.K.; Kirkby, Jasper; Kittel, W.; Klimentov, A.; Konig, A.C.; Kopal, M.; Koutsenko, V.; Kraber, M.; Kraemer, R.W.; Kruger, A.; Kunin, A.; Ladron de Guevara, P.; Laktineh, I.; Landi, G.; Lebeau, M.; Lebedev, A.; Lebrun, P.; Lecomte, P.; Lecoq, P.; Le Coultre, P.; Le Goff, J.M.; Leiste, R.; Levtchenko, M.; Levtchenko, P.; Li, C.; Likhoded, S.; Lin, C.H.; Lin, W.T.; Linde, F.L.; Lista, L.; Liu, Z.A.; Lohmann, W.; Longo, E.; Lu, Y.S.; Luci, C.; Luminari, L.; Lustermann, W.; Ma, W.G.; Malgeri, L.; Malinin, A.; Mana, C.; Mans, J.; Martin, J.P.; Marzano, F.; Mazumdar, K.; McNeil, R.R.; Mele, S.; Merola, L.; Meschini, M.; Metzger, W.J.; Mihul, A.; Milcent, H.; Mirabelli, G.; Mnich, J.; Mohanty, G.B.; Muanza, G.S.; Muijs, A.J.M.; Musicar, B.; Musy, M.; Nagy, S.; Natale, S.; Napolitano, M.; Nessi-Tedaldi, F.; Newman, H.; Nisati, A.; Novak, T.; Kluge, Hannelies; Ofierzynski, R.; Organtini, G.; Pal, I.; Palomares, C.; Paolucci, P.; Paramatti, R.; Passaleva, G.; Patricelli, S.; Paul, Thomas Cantzon; Pauluzzi, M.; Paus, C.; Pauss, F.; Pedace, M.; Pensotti, S.; Perret-Gallix, D.; Petersen, B.; Piccolo, D.; Pierella, F.; Pioppi, M.; Piroue, P.A.; Pistolesi, E.; Plyaskin, V.; Pohl, M.; Pojidaev, V.; Pothier, J.; Prokofev, D.; Quartieri, J.; Rahal-Callot, G.; Rahaman, Mohammad Azizur; Raics, P.; Raja, N.; Ramelli, R.; Rancoita, P.G.; Ranieri, R.; Raspereza, A.; Razis, P.; Ren, D.; Rescigno, M.; Reucroft, S.; Riemann, S.; Riles, Keith; Roe, B.P.; Romero, L.; Rosca, A.; Rosier-Lees, S.; Roth, Stefan; Rosenbleck, C.; Roux, B.; Rubio, J.A.; Ruggiero, G.; Rykaczewski, H.; Sakharov, A.; Saremi, S.; Sarkar, S.; Salicio, J.; Sanchez, E.; Schafer, C.; Schegelsky, V.; Schopper, H.; Schotanus, D.J.; Sciacca, C.; Servoli, L.; Shevchenko, S.; Shivarov, N.; Shoutko, V.; Shumilov, E.; Shvorob, A.; Son, D.; Souga, C.; Spillantini, P.; Steuer, M.; Stickland, D.P.; Stoyanov, B.; Straessner, A.; Sudhakar, K.; Sultanov, G.; Sun, L.Z.; Sushkov, S.; Suter, H.; Swain, J.D.; Szillasi, Z.; Tang, X.W.; Tarjan, P.; Tauscher, L.; Taylor, L.; Tellili, B.; Teyssier, D.; Timmermans, Charles; Ting, Samuel C.C.; Ting, S.M.; Tonwar, S.C.; Toth, J.; Tully, C.; Tung, K.L.; Ulbricht, J.; Valente, E.; Van de Walle, R.T.; Vasquez, R.; Veszpremi, V.; Vesztergombi, G.; Vetlitsky, I.; Vicinanza, D.; Viertel, G.; Villa, S.; Vivargent, M.; Vlachos, S.; Vodopianov, I.; Vogel, H.; Vogt, H.; Vorobev, I.; Vorobyov, A.A.; Wadhwa, M.; Wang, Q.; Wang, X.L.; Wang, Z.M.; Weber, M.; Wienemann, P.; Wilkens, H.; Wynhoff, S.; Xia, L.; Xu, Z.Z.; Yamamoto, J.; Yang, B.Z.; Yang, C.G.; Yang, H.J.; Yang, M.; Yeh, S.C.; Zalite, A.; Zalite, Yu.; Zhang, Z.P.; Zhao, J.; Zhu, G.Y.; Zhu, R.Y.; Zhuang, H.L.; Zichichi, A.; Zimmermann, B.; Zoller, M.

    2003-01-01

    A search for pair-produced charged Higgs bosons is performed with the L3 detector at LEP using data collected at centre-of-mass energies between 189 and 209GeV, corresponding to an integrated luminosity of 629.4/pb. Decays into a charm and a strange quark or into a tau lepton and its neutrino are considered. No significant excess is observed and lower limits on the mass of the charged Higgs boson are derived at the 95% confidence level. They vary from 76.5 to 82.7GeV, as a function of the H->tv branching ratio.

  12. Measurement of W Polarisation at LEP

    CERN Document Server

    Achard, P; Aguilar-Benítez, M; Alcaraz, J; Alemanni, G; Allaby, James V; Aloisio, A; Alviggi, M G; Anderhub, H; Andreev, V P; Anselmo, F; Arefev, A; Azemoon, T; Aziz, T; Bagnaia, P; Bajo, A; Baksay, G; Baksay, L; Baldew, S V; Banerjee, S; Barczyk, A; Barillère, R; Bartalini, P; Basile, M; Batalova, N; Battiston, R; Bay, A; Becattini, F; Becker, U; Behner, F; Bellucci, L; Berbeco, R; Berdugo, J; Berges, P; Bertucci, B; Betev, B L; Biasini, M; Biglietti, M; Biland, A; Blaising, J J; Blyth, S C; Bobbink, Gerjan J; Böhm, A; Boldizsar, L; Borgia, B; Bottai, S; Bourilkov, D; Bourquin, Maurice; Braccini, S; Branson, J G; Brochu, F; Burger, J D; Burger, W J; Cai, X D; Capell, M; Cara Romeo, G; Carlino, G; Cartacci, A M; Casaus, J; Cavallari, F; Cavallo, N; Cecchi, C; Cerrada, M; Chamizo-Llatas, M; Chang, Y H; Chemarin, M; Chen, A; Chen, G; Chen, G M; Chen, H F; Chen, H S; Chiefari, G; Cifarelli, Luisa; Cindolo, F; Clare, I; Clare, R; Coignet, G; Colino, N; Costantini, S; de la Cruz, B; Cucciarelli, S; van Dalen, J A; De Asmundis, R; Déglon, P L; Debreczeni, J; Degré, A; Dehmelt, K; Deiters, K; Della Volpe, D; Delmeire, E; Denes, P; De Notaristefani, F; De Salvo, A; Diemoz, M; Dierckxsens, M; Dionisi, C; Dittmar, M; Doria, A; Dova, M T; Duchesneau, D; Duda, M; Echenard, B; Eline, A; El-Hage, A; El-Mamouni, H; Engler, A; Eppling, F J; Extermann, P; Falagán, M A; Falciano, S; Favara, A; Fay, J; Fedin, O; Felcini, M; Ferguson, T; Fesefeldt, H S; Fiandrini, E; Field, J H; Filthaut, Frank; Fisher, P H; Fisher, W; Fisk, I; Forconi, G; Freudenreich, Klaus; Furetta, C; Galaktionov, Yu; Ganguli, S N; García-Abia, P; Gataullin, M; Gentile, S; Giagu, S; Gong, Z F; Grenier, G; Grimm, O; Grünewald, M W; Guida, M; van Gulik, R; Gupta, V K; Gurtu, A; Gutay, L J; Haas, D; Hakobyan, R S; Hatzifotiadou, D; Hebbeker, T; Hervé, A; Hirschfelder, J; Hofer, H; Hohlmann, M; Holzner, G; Hou, S R; Hu, Y; Jin, B N; Jones, L W; de Jong, P; Josa-Mutuberria, I; Käfer, D; Kaur, M; Kienzle-Focacci, M N; Kim, J K; Kirkby, Jasper; Kittel, E W; Klimentov, A; König, A C; Kopal, M; Koutsenko, V F; Kräber, M H; Krämer, R W; Krüger, A; Kunin, A; Ladrón de Guevara, P; Laktineh, I; Landi, G; Lebeau, M; Lebedev, A; Lebrun, P; Lecomte, P; Lecoq, P; Le Coultre, P; Le Goff, J M; Leiste, R; Levtchenko, M; Levchenko, P M; Li, C; Likhoded, S; Lin, C H; Lin, W T; Linde, Frank L; Lista, L; Liu, Z A; Lohmann, W; Longo, E; Lü, Y S; Luci, C; Luminari, L; Lustermann, W; Ma Wen Gan; Malgeri, L; Malinin, A; Maña, C; Mangeol, D J J; Mans, J; Martin, J P; Marzano, F; Mazumdar, K; McNeil, R R; Mele, S; Merola, L; Meschini, M; Metzger, W J; Mihul, A; Milcent, H; Mirabelli, G; Mnich, J; Mohanty, G B; Muanza, G S; Muijs, A J M; Musicar, B; Musy, M; Nagy, S; Natale, S; Napolitano, M; Nessi-Tedaldi, F; Newman, H; Nisati, A; Nowak, H; Ofierzynski, R A; Organtini, G; Palomares, C; Paolucci, P; Paramatti, R; Passaleva, G; Patricelli, S; Paul, T; Pauluzzi, M; Paus, C; Pauss, Felicitas; Pedace, M; Pensotti, S; Perret-Gallix, D; Petersen, B; Piccolo, D; Pierella, F; Pioppi, M; Piroué, P A; Pistolesi, E; Plyaskin, V; Pohl, M; Pozhidaev, V; Pothier, J; Prokofiev, D O; Prokofev, D; Quartieri, J; Rahal-Callot, G; Rahaman, M A; Raics, P; Raja, N; Ramelli, R; Rancoita, P G; Ranieri, R; Raspereza, A V; Razis, P A; Ren, D; Rescigno, M; Reucroft, S; Riemann, S; Riles, K; Roe, B P; Romero, L; Rosca, A; Rosier-Lees, S; Roth, S; Rosenbleck, C; Roux, B; Rubio, J A; Ruggiero, G; Rykaczewski, H; Sakharov, A; Saremi, S; Sarkar, S; Salicio, J; Sánchez, E; Sanders, M P; Schäfer, C; Shchegelskii, V; Schopper, Herwig Franz; Schotanus, D J; Sciacca, C; Servoli, L; Shevchenko, S; Shivarov, N; Shoutko, V; Shumilov, E; Shvorob, A V; Son, D; Souga, C; Spillantini, P; Steuer, M; Stickland, D P; Stoyanov, B; Strässner, A; Sudhakar, K; Sultanov, G G; Sun, L Z; Sushkov, S; Suter, H; Swain, J D; Szillási, Z; Tang, X W; Tarjan, P; Tauscher, Ludwig; Taylor, L; Tellili, B; Teyssier, D; Timmermans, C; Ting, Samuel C C; Ting, S M; Tonwar, S C; Tóth, J; Tully, C; Tung, K L; Ulbricht, J; Valente, E; Van de Walle, R T; Vásquez, R; Veszpremi, V; Vesztergombi, G; Vetlitskii, I; Vicinanza, D; Viertel, Gert M; Villa, S; Vivargent, M; Vlachos, S; Vodopyanov, I; Vogel, H; Vogt, H; Vorobev, I; Vorobyov, A A; Wadhwa, M; Wang, X L; Wang, Z M; Weber, M; Wienemann, P; Wilkens, H; Wynhoff, S; Xia, L; Xu, Z Z; Yamamoto, J; Yang, B Z; Yang, C G; Yang, H J; Yang, M; Yeh, S C; Zalite, A; Zalite, Yu; Zhang, Z P; Zhao, J; Zhu, G Y; Zhu, R Y; Zhuang, H L; Zichichi, A; Zimmermann, B; Zöller, M

    2003-01-01

    The three different helicity states of W bosons produced in the reaction e+ e- -> W+ W- -> l nu q q~ at LEP are studied using leptonic and hadronic W decays. Data at centre-of-mass energies \\sqrt s = 183-209 GeV are used to measure the polarisation of W bosons, and its dependence on the W boson production angle. The fraction of longitudinally polarised W bosons is measured to be 0.218 \\pm 0.027 \\pm 0.016 where the first uncertainty is statistical and the second systematic, in agreement with the Standard Model expectation.

  13. Geodesy and metrology of the LEP

    International Nuclear Information System (INIS)

    Mayoud, M.

    1985-01-01

    The accurate installation of an accelerator of 8,500 m diameter requires the most refined geodetic techniques. The instrumentation in use incorporates not only lasers and eventually satellites, but also the simple nylon wire. Over 20,000 measurement will be made to install to within 0.1 mm the 5,000 fonctional elements of the LEP machine (Large Electron-Positron Collider). This work will be controlled and checked by portable computers. Each instrument will be automatic and will contain a miniature micro-computer (on a ''flexible-rigid'' card) [fr

  14. LEP vacuum chamber, cross-section

    CERN Multimedia

    CERN PhotoLab

    1983-01-01

    Cross-section of the final prototype for the LEP vacuum chamber. The elliptic main-opening is for the beam. The small channel to the left is for the cooling water, to carry away the heat deposited by the synchrotron radiation. The square channel to the right houses the Non-Evaporable Getter (NEG) pump. The chamber is made from extruded aluminium. Its outside is clad with lead, to stop the synchrotron radiation emitted by the beam. For good adherence between Pb and Al, the Al chamber was coated with a thin layer of Ni. Ni being slightly magnetic, some resulting problems had to be overcome. See also 8301153.

  15. B and D Spectroscopy at LEP

    CERN Document Server

    Muheim, Franz

    1999-02-17

    Results from the four LEP experiments ALEPH, DELPHI, L3, and OPAL on the spectroscopy of B and charmed mesons are presented. The predictions of Heavy Quark Effective Theory (HQET) for the masses and the widths of excited L=1 B mesons are supported by a new measurement from L3. A few B_c candidate eve nts have masses consistent with the recent CDF observation and the predictions. New results on Ddstar production and B -> Ddstar l nu are also presented. The evidence for a Dstarpr meson reported recently by DELPHI is not supported by OPAL and CLEO.

  16. On sbottom hadronization at LEP 200

    International Nuclear Information System (INIS)

    Gris, Ph.

    1997-01-01

    The question of the hadronization of the sbottom is of interest for experimental searches. A study concerning this feature is presented for masses accessible at LEP 200 assuming that the sbottom is the lightest squark. Numerical evaluations of the decay modes b-bar 1 → b X -bar 1 0 and b-bar 1 → b X -bar 2 0 are done by varying the SUSY space parameters M 2 and μ. The results obtained allow to assert in which conditions the sbottom hadronizes and which decay dominates. (authors)

  17. Two-photon physics at LEP

    International Nuclear Information System (INIS)

    Ginzburg, I.F.

    1988-01-01

    The two-photon production of hadrons in e + e - collisions e + e - →e + e - h from which the γγ→h cross sections are extracted is discussed. The common features of these processes are: hadrons move, as a rule, along e + e - beam axis, their total transverse momentum K perpendicular or perpendicular to is small; the total hadron energy is usually less than √S/2. Physical problems of soft processes, exotics, hard processes, semihard processes are considered. New possibilities of LEP, the most interesting and real are presented

  18. Single top quark production at LEP200?

    International Nuclear Information System (INIS)

    Boos, E.; Ishikawa, T.; Kaneko, T.; Kawabata, S.; Kurihara, Y.; Shimizu, Y.; Tanaka, H.

    1994-01-01

    A complete tree-level calculation of the reaction e + e - → e + ν e anti tb (e - anti ν e t anti b) in the electroweak standard theory in the LEP200 energy range is presented. For top quark masses in the range 130 to 190 GeV the cross sections are found to be in the order of 10 -5 to 10 -6 pb. Therefore, the number of single top quark events is expected to be negligible even with an integrated luminosity of L = 500 pb -1 . It is further demonstrated that the Weizsaecker-Williams approximation is approaching the accurate cross section calculations resonably well. (orig.)

  19. b-tagging in DELPHI at LEP

    CERN Document Server

    Abdallah, J; Adam, W; Adye, T; Adzic, P; Albrecht, T; Alderweireld, T; Alemany-Fernandez, R; Allmendinger, T; Allport, P P; Almehed, S; Amaldi, Ugo; Amapane, N; Amato, S; Anashkin, E; Andreazza, A; Andringa, S; Anjos, N; Antilogus, P; Apel, W D; Arnoud, Y; Ask, S; Åsman, B; Augustin, J E; Augustinus, A; Baillon, Paul; Ballestrero, A; Bambade, P; Barbier, R; Bardin, Dimitri Yuri; Barker, G; Baroncelli, A; Bates, M; Battaglia, Marco; Baubillier, M; Becks, K H; Begalli, M; Behrmann, A; Benekos, N C; Benvenuti, Alberto C; Bérat, C; Berggren, M; Berntzon, L; Bertrand, D; Besançon, M; Besson, N; Bibby, J; Biffi, P; Bloch, D; Blom, M; Bonesini, M; Boonekamp, M; Booth, P S L; Borisov, G; Botner, O; Bouquet, B; Bowcock, T J V; Boyko, I; Bracko, M; Branchini, P; Brenner, R; Brodet, E; Brückman, P; Brunet, J M; Bugge, L; Buschmann, P; Caccia, M; Calvi, M; Camporesi, T; Canale, V; Carena, F; Castro, N; Cavallo, F R; Chabaud, V; Chapkin, M M; Charpentier, P; Checchia, P; Chierici, R; Shlyapnikov, P; Chudoba, J; Chung, S U; Cieslik, K; Collins, P; Contri, R; Cosme, G; Cossutti, F; Costa, M J; Couchot, F; Crawley, B; Crennell, D J; Cuevas-Maestro, J; D'Almagne, B; D'Hondt, J; Dalmau, J; Da Silva, T; Da Silva, W; Della Ricca, G; De Angelis, A; de Boer, Wim; De Clercq, C; De Lotto, B; De Maria, N; De Min, A; De Paula, L S; Di Ciaccio, Lucia; Dijkstra, H; Di Simone, A; Doroba, K; Drees, J; Dris, M; Eigen, G; Ekelöf, T J C; Ellert, M; Elsing, M; Espirito-Santo, M C; Fanourakis, G K; Fassouliotis, D; Feindt, M; Fernández, J; Ferrer, A; Ferro, F; Flagmeyer, U; Föth, H; Fokitis, E; Fulda-Quenzer, F; Fuster, J A; Gandelman, M; García, C; Gavillet, P; Gazis, E N; Geralis, T; Gokieli, R; Golob, B; Gómez-Cadenas, J J; Gómez-Ceballos, G; Gonçalves, P; Graziani, E; Grosdidier, G; Grzelak, K; Guy, J; Haag, C; Hallgren, A; Hamacher, K; Hamilton, K; Hansen, J; Haug, S; Hauler, F; Hedberg, V; Hennecke, M; Hernando, J A; Herr, H; Heuser, J M; Holmgren, S O; Holt, P J; Houlden, M A; Hultqvist, K; Jackson, J N; Jalocha, P; Jarlskog, C; Jarlskog, G; Jarry, P; Jeans, D; Johansson, E K; Johansson, P D; Jonsson, P; Joram, C; Jungermann, L; Kapusta, F; Karlsson, M; Katsanevas, S; Katsoufis, E C; Keränen, R; Kernel, G; Kersevan, Borut P; Kiiskinen, A P; King, B T; Kjaer, N J; Kluit, P; Kokkinias, P; Kourkoumelis, C; Kuznetsov, O; Krumshtein, Z; Kucharczyk, M; Kucewicz, W; Kurowska, J; Lamsa, J; Leder, G; Ledroit, F; Leinonen, L; Leitner, R; Lemonne, J; Lepeltier, V; Lesiak, T; Liebig, W; Liko, D; Lipniacka, A; Lopes, J H; López, J M; Loukas, D; Lutz, P; Lyons, L; MacNaughton, J; Malek, A; Maltezos, S; Mandl, F; Marco, J; Marco, R; Maréchal, B; Margoni, M; Marin, J C; Mariotti, C; Markou, A; Martínez-Rivero, C; Martínez-Vidal, F; Masik, J; Mastroyiannopoulos, N; Matorras, F; Matteuzzi, C; Mazzucato, F; Mazzucato, M; McNulty, R; Meroni, C; Meyer, W T; Migliore, E; Mitaroff, W A; Mjörnmark, U; Moa, T; Moch, M; Mönig, K; Monge, R; Montenegro, J; Moraes, D; Moreno, S; Morettini, P; Müller, U; Münich, K; Mulders, M; Mundim, L; Murray, W; Muryn, B; Myatt, Gerald; Myklebust, T; Nassiakou, M; Navarria, Francesco Luigi; Nawrocki, K; Nicolaidou, R; Niezurawski, P; Nikolenko, M; Nomerotski, A; Norman, A; Nygren, A; Oblakowska-Mucha, A; Obraztsov, V F; Olshevskii, A G; Onofre, A; Orava, Risto; Österberg, K; Ouraou, A; Oyanguren, A; Paganoni, M; Paiano, S; Palacios, J P; Palka, H; Papadopoulou, T D; Pape, L; Parkes, C; Parodi, F; Parzefall, U; Passeri, A; Passon, O; Peralta, L; Perepelitsa, V F; Perrotta, A; Petrolini, A; Piedra, J; Pieri, L; Pierre, F; Pimenta, M; Piotto, E; Podobnik, T; Poireau, V; Pol, M E; Polok, G; Poropat, P; Pozdnyakov, V; Pukhaeva, N; Pullia, Antonio; Rames, J; Ramler, L; Read, A; Rebecchi, P; Rehn, J; Reid, D; Reinhardt, R; Renton, P B; Richard, F; Rídky, J; Rivero, M; Rodríguez, D; Romero, A; Ronchese, P; Rosenberg, E I; Roudeau, Patrick; Rovelli, T; Ruhlmann-Kleider, V; Ryabtchikov, D; Sadovskii, A; Salmi, L; Salt, J; Savoy-Navarro, A; Schwickerath, U; Segar, A; Sekulin, R L; Siebel, M; Sissakian, A N; Smadja, G; Smirnova, O G; Sokolov, A; Sopczak, A; Sosnowski, R; Spassoff, Tz; Stanitzki, M; Stavitski, I; Stocchi, A; Strauss, J; Stugu, B; Szczekowski, M; Szeptycka, M; Szumlak, T; Tabarelli de Fatis, T; Taffard, A C; Tegenfeldt, F; Timmermans, J; Tinti, N; Tkatchev, L G; Tobin, M; Todorovova, S; Tomaradze, A G; Tomé, B; Tonazzo, A; Tortosa, P; Travnicek, P; Treille, D; Trischuk, W; Tristram, G; Trochimczuk, M; Troncon, C; Turluer, M L; Tyapkin, I A; Tyapkin, P; Tyndel, M; Tzamarias, S; Uvarov, V; Valenti, G; van Dam, P; Van Eldik, J; Van Lysebetten, A; Van Remortel, N; Van Vulpen, I B; Vegni, G; Veloso, F; Venus, W A; Verbeure, F; Verdier, P; Verzi, V; Vilanova, D; Vitale, L; Vrba, V; Wahlen, H; Washbrook, A J; Weilhammer, Peter; Weiser, C; Wicke, D; Wickens, J H; Wilkinson, G; Winter, M; Witek, M; Yushchenko, O P; Zalewska-Bak, A; Zalewski, Piotr; Zavrtanik, D; Zimin, N I; Zinchenko, A I; Zupan, M

    2004-01-01

    The standard method used for tagging b-hadrons in the DELPHI experiment at the CERN LEP Collider is discussed in detail. The main ingredient of b-tagging is the impact parameters of tracks, which relies mostly on the vertex detector. Additional information, such as the mass of particles associated to a secondary vertex, significantly improves the selection efficiency and the background suppression. The paper describes various discriminating variables used for the tagging and the procedure of their combination. In addition, applications of b-tagging to some physics analyses, which depend crucially on the performance and reliability of b-tagging, are described briefly.

  20. Inside the LEP control room at start-up

    CERN Multimedia

    1989-01-01

    Physicists grouped around a screen in the LEP control room at the strat-up of LEP on 14 July 1989. The emotion of the moment is clear. Carlo Rubbia, Director-General of CERN at the time, is in the centre and on his left, Herwig Schopper, former Director-General of the Organization.

  1. Drift chamber vertex detectors for SLC/LEP

    Energy Technology Data Exchange (ETDEWEB)

    Hayes, K G

    1988-03-01

    Factors influencing the design of drift chamber vertex detectors for SLC and LEP are discussed including global strategy, chamber gas, cell design, and signal processing. The designs of the vertex chambers for the L3 and OPAL experiments at LEP and the Mark II experiment at the SLC are described.

  2. Single-cell LEP-type cavity on measurement stand

    CERN Multimedia

    CERN PhotoLab

    1982-01-01

    A single-cell cavity, made of copper, with tapered connectors for impedance measurements. It was used as a model of LEP-type superconducting cavities, to investigate impedance and higher-order modes and operated at around 600 MHz (the LEP acceleration frequency was 352.2 MHz). See 8202500.

  3. The LEP injection monitors: Design and first results with beam

    International Nuclear Information System (INIS)

    Burtin, G.; Colchester, R.; Fischer, C.; Halvarsson, B.; Hemery, J.Y.; Jung, R.; Levitt, S.; Vouillot, J.M.

    1989-01-01

    The LEP injection monitors comprise of split foil monitors, luminescent screens and beam stoppers. The monitors are described with particular emphasis on their special features. These include: their low loss factors, their protection against synchrotron radiation and the screen read-out with a CCD chip. The results obtained during the positron injection tests in LEP in July 1988 are reported. 8 figs

  4. National radon measurement-proficiency program: Individual proficiency report

    International Nuclear Information System (INIS)

    1992-05-01

    In February 1986, the U.S. Environmental Protection Agency (EPA) established the Radon Measurement Proficiency (RMP) Program to assist the public in identifying organizations capable of providing reliable radon measurement services. In December 1991, EPA announced the new individual proficiency listing category in the RMP Program. Individuals applying for this new listing status must demonstrate knowledge of radon measurement fundamentals by passing a written proficiency examination, maintain affiliation with an RMP listed organization, and meet other program requirements. This report lists those individuals who have met the requirements of the RMP Program as of April 30, 1992. These requirements are designed to provide minimum proficiency criteria for individuals who provide radon measurement services on-site in a residential environment

  5. National Radon Contractor Proficiency Program. Proficiency report: Supplement

    International Nuclear Information System (INIS)

    1991-02-01

    The report, a supplement to the RCP Proficiency Report, will further assist governmental officials in providing advice to the public on the selection of proficient radon mitigation contractors. These reports list 1,123 contractors who have met the requirements of the RCP Program as of December 15, 1990. The Proficiency Report provides information on each contractor's name, RCP identification number, company name, address, phone number, and geographic service area. The report provides two additional tables, indexed by company name and by RCP identification number. The report is intended to help users quickly identify a proficient contractor if only the company name is known, or to verify which contractor is associated with a particular ID number

  6. National Radon Contractor Proficiency (RCP) Program. Proficiency report, June 1991

    International Nuclear Information System (INIS)

    1991-06-01

    The primary objective of the U.S. Environmental Protection Agency's (EPA) efforts to address the indoor radon problem is to reduce radon levels in buildings throughout the country. Achieving the objective requires a nationwide supply of capable radon mitigation contractors. In the Indoor Radon Abatement Act of 1988, Congress authorized EPA to establish a program to evaluate radon mitigation contractors and to provide the information to the public in cooperation with the States. The Radon Contractor Proficiency (RCP) Program was developed to assist States, EPA Regions, local government officials, and the public in selecting contractors who have demonstrated their proficiency in reducing indoor radon levels. The program is managed by the EPA Office of Radiation Programs' Radon Division. Under the voluntary program, radon contractors demonstrate their proficiency by meeting specific Program requirements. Individual contractors who meet these requirements are then listed in periodic RCP Proficiency Reports

  7. Observations on LEP with a view to SSC

    International Nuclear Information System (INIS)

    Toohig, T.E.

    1984-01-01

    From 24-29 October 1984 a visit was made to the LEP project at CERN with a view to extracting from the LEP planning and experience what might be useful in planning an SSC. With a circumference of 26.7 km, in a reasonably densely-populated area outside the boundaries of the CERN site, LEP already faces most of the problems of environment, public relations, maintenance and operation that will be faced by an SSC project. Information is presented under the headings of: (1) radiation protection; (2) heating, ventilation, and airconditioning; (3) electrical power distribution; (4) LEP experiments/UA1, UA2; (5) civil; (6) infrastructure installation; (7) survey; (8) safety; and (9) LEP controls. Each report lists the CERN individuals who generously provided their insights and help

  8. Testing Proficiency in Interpersonal Communication

    Science.gov (United States)

    Byers, Burton H.

    1973-01-01

    Discusses several hypotheses about the measurement of speech-communication proficiency which are being tested at the University of Hawaii and a testing instrument entitled Dy Comm'' (dyadic communication) which emerged from this research. (DD)

  9. Heavy quark production at SLC and LEP

    International Nuclear Information System (INIS)

    Hearty, C.

    1990-06-01

    Experiments at SLC and LEP have made preliminary measurements of the relative partial widths of the c and b quarks. Using D* tagging, DELPHI has found R c bar c triple-bond/Γ c bar c/Γ hadr. = 0.162 ± 0.032 ± 0.031, in good agreement with the Standard Model value of 0.171. ALEPH has used semileptonic decays of charm to obtain 0.148 ± 0.044 -0.038 +0.045 . Three experiments have used semileptonic Β decays to measurement R b bar b: R b bar b = 0.23 ± 0.10 (Mark II), 0.218 ± 0.010 ± 0.021 (L3), and 0.220 ± 0.016 ± 0.024 (ALEPH). All agree well with the expected value of 0.217. The uncertainty in branching ratios of c and b hadrons is the largest systematic error in all of the results. Future LEP measurements of the branching ratios may reduce the errors. R b bar b will also be measured with different, and possibly lower, systematic errors by Mark II using impact parameter tagging

  10. Physics at LEP2. Vol. 2

    International Nuclear Information System (INIS)

    Altarelli, G.; Sjoestrand, T.; Zwirner, F.

    1995-01-01

    This is final report of the Workshop on Physics at LEP2, held at CERN during 1995. The first part of vol. 1 is devoted to aspects of machine physics of particular relevance to experiments, including the energy, luminosity and interaction regions, as well as the measurement of beam energy. The second part of vol. 1 is a relatively concise, but fairly complete, handbook on the physics of e + e - annihilation above the WW threshold and up to √s∼200 GeV. It contains discussions on WW cross-sections and distributions, W mass determination, Standard Model processes, QCD and gamma-gamma physics, as well as aspects of discovery physics, such as Higgs, new particle searches, triple gauge boson couplings and Z'. The second volume contains a review of the existing Monte Carlo generators for LEP2 physics. These include generators for WW physics, QCD and gamma-gamma processes, Bhabha scattering and discovery physics. A special effort was made to co-ordinate the different parts, with a view to achieving a systematic and balanced review of the subject, rather than just publishing a collection of separate contributions. (orig.)

  11. Synchro-betatron resonance excitation in LEP

    International Nuclear Information System (INIS)

    Myers, S.

    1987-01-01

    The excitation of synchrotro-betatron resonances due to spurious dispersion and induced transverse deflecting fields at the RF cavities has been simulated for the LEP storage ring. These simulations have been performed for various possible modes of operation. In particular, a scenario has been studied in which LEP is operated at the maximum possible value of the synchrotron tune throughout the acceleration cycle, in an attempt to maximise the threshold intensity at which the Transverse Mode Coupling Instability (TMCI) occurs. This mode of operation necessitates the crossing of synchro-betatron resonances at some points in the acceleration cycle if low order non-linear machine resonances are to be avoided. Simulations have been performed in which the machine tune is swept across these synchro-betratron resonances at a rate given by the bandwidth of the magnet plus power supply circuits of the main quadrupole chain. The effect of longitudinal and transverse wake-fields on the excitation of these resonances has been investigated. These studies indicate that the distortion of the RF potential well caused by the longitudinal wake fields increases the non-linear content of the synchrotron motion and consequently increases significantly the excitation of the higher order synchro-betatron resonances

  12. Physics at LEP2. Vol. 1

    International Nuclear Information System (INIS)

    Altarelli, G.; Sjoestrand, T.; Zwirner, F.

    1996-01-01

    This is the final report of the Workshop on Physics at LEP2, held at CERN during 1995. The first part of vol. 1 is devoted to aspects of machine physics of particular relevance to experiments, including the energy, luminosity and interaction regions, as well as the measurement of beam energy. The second part of vol. 1 is a relatively concise, but fairly complete, handbook on the physics of e + e - annihilation above the WW threshold and up to √s∼200 GeV. It contains discussions on WW cross-sections and distributions, W mass determination, Standard Model processes, QCD and gamma-gamma physics, as well as aspects of discovery physics, such as Higgs, new particle searches, triple gauge boson couplings and Z'. The second volume contains a review of the existing Monte Carlo generators for LEP2 physics. These include generators for WW physics, QCD and gamma-gamma processes, Bhabha scattering and discovery physics. A special effort was made to co-ordinate the different parts, with a view to achieving a systematic and balanced review of the subject, rather than just publishing a collection of separate contributions. (orig.)

  13. Physics at LEP2. Vol. 2

    Energy Technology Data Exchange (ETDEWEB)

    Altarelli, G [ed.; Sjoestrand, T [ed.; Zwirner, F [ed.

    1995-02-19

    This is final report of the Workshop on Physics at LEP2, held at CERN during 1995. The first part of vol. 1 is devoted to aspects of machine physics of particular relevance to experiments, including the energy, luminosity and interaction regions, as well as the measurement of beam energy. The second part of vol. 1 is a relatively concise, but fairly complete, handbook on the physics of e{sup +}e{sup -} annihilation above the WW threshold and up to {radical}s{approx}200 GeV. It contains discussions on WW cross-sections and distributions, W mass determination, Standard Model processes, QCD and gamma-gamma physics, as well as aspects of discovery physics, such as Higgs, new particle searches, triple gauge boson couplings and Z`. The second volume contains a review of the existing Monte Carlo generators for LEP2 physics. These include generators for WW physics, QCD and gamma-gamma processes, Bhabha scattering and discovery physics. A special effort was made to co-ordinate the different parts, with a view to achieving a systematic and balanced review of the subject, rather than just publishing a collection of separate contributions. (orig.).

  14. Proficiency testing for radionuclides

    International Nuclear Information System (INIS)

    Faanhof, A.; Kotze, O.; Louw, I.

    2010-01-01

    Proficiency testing in general is only useful when it suites a certain purpose. With regards to radionuclides basically three fields of interest can be identified: (I)Foodstuffs-Introduced in the early 1960's to monitor the fall-out of nuclear tests and eventually the pathway to foodstuffs fit for human consumption. The demand for analysis increased substantially after the Chernobyl accident. (II) Natural radioactivity-Associated with mining and mineral processing of uranium and thorium baring mineral resources throughout the world where the radionuclides from the natural uranium and thorium decay series are found to pose concern for professional and public exposure. (III) Artificial radioactivity-This category covers mostly the long-lived nuclides generated by nuclear fission of the fuel used in nuclear power plants, research reactors and nuclear bomb tests. All three categories require a specific approach for laboratories to test their ability to analyze specific radio nuclides of interest in a variety of matrices. In this lecture I will give a compiled overview of the required radioanalytical skills, analysis sensitivity needed and radionuclides of interest, with more specific emphasis on QAQC of water sources and the recommended monitoring approach. And provide information on available reference materials and organizations/institutes that provide regular exercises for participating laboratories. I will also briefly communicate on the advantages and disadvantages of ISO/IEC 17025 accreditation for test laboratories, which is these days a prerequisite in national and international trade especially where foodstuffs and mineral products are concerned.

  15. "If I write like a scientist, then soy un cientifico": Differentiated Writing Supports and the Effects on Fourth-Grade English Proficient Students' and English Language Learners' Science Content Knowledge and Explanatory Writing About Magnetism and Electricity

    Science.gov (United States)

    Lichon, Kathryn A.

    The purpose of this pre-post quasi-experimental dissertation was to investigate the effects of differentiated writing supports on English Proficient Students' (EPSs) and English Language Learners' (ELLs) science content knowledge and explanatory writing about magnetism and electricity. Eighty-seven fourth-grade students (EPSs = 35; ELLs = 52) were randomly assigned to two groups based on two differentiated writing: guided questions ( n = 43) or targeted writing frames (n = 44). In the guided questions condition, students completed four question sets after a science investigation, and in the targeted writing frames condition, students completed the same four question sets, but with explicit support for vocabulary, transitions, and relational language in the form of if-then statements. Over the course of the four week intervention, students completed a total of nine writing tasks, and were pretested and posttested on six variables: magnetism and electricity content knowledge test, explanatory writing task, total number of words written, total number of sentences written, number of if-then statements, and number of content-based vocabulary words. Results indicate that EPSs and ELLs in both writing conditions improved significantly from pretest to posttest on six content and explanatory writing variables, with statistically significant gain scores occurring for the magnetism and electricity content knowledge test in which the targeted writing frames condition had a larger rate of gain. ANCOVA results indicated that in comparing writing conditions, a statistically significant difference was found for magnetism and electricity content knowledge posttests, when controlling for pretests. No statistically significant effects for language classification on the six variables were found when controlling for pretest scores. Interaction effects between writing condition and language classification were statistically significantly different for the interaction effect found on if

  16. A Blueprint for Developing Culturally Proficient/Responsive School Administrators in Special Education

    Science.gov (United States)

    Bakken, Jeffrey P.; Smith, Beverly A.

    2011-01-01

    This article addresses the important topic of culturally proficient/responsive school administrators for culturally and linguistically diverse (CLD) students with learning disabilities (LD). Culturally proficient/responsive school administrators with knowledge and strong leadership skills in multicultural education are essential to impact school…

  17. Computer proficiency questionnaire: assessing low and high computer proficient seniors.

    Science.gov (United States)

    Boot, Walter R; Charness, Neil; Czaja, Sara J; Sharit, Joseph; Rogers, Wendy A; Fisk, Arthur D; Mitzner, Tracy; Lee, Chin Chin; Nair, Sankaran

    2015-06-01

    Computers and the Internet have the potential to enrich the lives of seniors and aid in the performance of important tasks required for independent living. A prerequisite for reaping these benefits is having the skills needed to use these systems, which is highly dependent on proper training. One prerequisite for efficient and effective training is being able to gauge current levels of proficiency. We developed a new measure (the Computer Proficiency Questionnaire, or CPQ) to measure computer proficiency in the domains of computer basics, printing, communication, Internet, calendaring software, and multimedia use. Our aim was to develop a measure appropriate for individuals with a wide range of proficiencies from noncomputer users to extremely skilled users. To assess the reliability and validity of the CPQ, a diverse sample of older adults, including 276 older adults with no or minimal computer experience, was recruited and asked to complete the CPQ. The CPQ demonstrated excellent reliability (Cronbach's α = .98), with subscale reliabilities ranging from .86 to .97. Age, computer use, and general technology use all predicted CPQ scores. Factor analysis revealed three main factors of proficiency related to Internet and e-mail use; communication and calendaring; and computer basics. Based on our findings, we also developed a short-form CPQ (CPQ-12) with similar properties but 21 fewer questions. The CPQ and CPQ-12 are useful tools to gauge computer proficiency for training and research purposes, even among low computer proficient older adults. © The Author 2013. Published by Oxford University Press on behalf of The Gerontological Society of America. All rights reserved. For permissions, please e-mail: journals.permissions@oup.com.

  18. THE OBSERVATION OF TEACHER CANDIDATE RELATED SCIENCE AND TECHNOLOGY TEACHER'S PROFICIENCY

    OpenAIRE

    BAHŞİ, Muammer; TURAN, Mehmet; YILAYAZ, Ömer

    2009-01-01

    In this study it is evaluated science and tecnology teacher's proficiency based on students insights of science and tecnology education students in education faculty. It was used Standarts for Teacher Proficiency which is prepared from Ministry of National Education. The research was conducted on 85 Science and Tecnology students (4th classes) studying at the education faculty of Firat University. Data from results of study was analysed by using SPSS.

  19. English Learner Students' Readiness for Academic Success: The Predictive Potential of English Language Proficiency Assessment Scores in Arizona and Nevada. REL 2017-172

    Science.gov (United States)

    Haas, Eric; Tran, Loan; Huang, Min

    2016-01-01

    When is the right moment to transition an English learner student from part-time participation in English language development classes into full-time participation in mainstream English-only classes? English learner students should be moved into full-time mainstream English-only classes when they are sufficiently fluent in English to be able to…

  20. Working Together To Become Proficient Readers. Early Impact of the Talent Development Middle School's Student Team Literature Program. Report No. 15.

    Science.gov (United States)

    Mac Iver, Douglas J.; Plank, Stephen B.; Balfanz, Robert

    The Talent Development Model of Middle School Reform includes a "Student Team Literature" (STL) program that relies on: (1) curricular materials designed to assist students to study great literature; (2) recommended instructional practices, peer assistance processes, and assessments; and (3) staff development, mentoring, and advising to…

  1. A newly observed Effect affects the LEP Beam Energy

    CERN Document Server

    Brun, G; Galbraith, Peter; Henrichsen, K N; Koratzinos, M; Placidi, Massimo; Puzo, P; Drees, A; Geitz, M A

    1996-01-01

    The LEP magnetic bending field and therefore the beam energy is changed by a current flow over the vacuum chamber. The current is created by trains travelling between the Geneva main station and destinations in France. Some of the rail current leaks into earth and returns to the power station via the LEP tunnel, where the vacuum chamber is one of the conductors. Train leakage currents penetrate LEP at the injection lines from the SPS close to IP1 and between IP5 and IP7, thereby interacting with the magnetic dipole field. The observed changes in B field cause beam energy increases of several MeV.

  2. High precision measurements of the luminosity at LEP

    International Nuclear Information System (INIS)

    Pietrzyk, B.

    1994-01-01

    The art of the luminosity measurements at LEP is presented. First generation LEP detectors have measured the absolute luminosity with the precision of 0.3-0.5%. The most precise present detectors have reached the 0.07% precision and the 0.05% is not excluded in future. Center-of-mass energy dependent relative precision of the luminosity detectors and the use of the theoretical cross-section in the LEP experiments are also discussed. (author). 18 refs., 6 figs., 6 tabs

  3. Cultutal Factors Affecting English Proficiency in Rural Areas

    Science.gov (United States)

    Ler, Ee Chop

    2012-01-01

    The purpose of this study is to investigate the rural "cultural" problems and to determine their effect on the learning of English. Twenty students from different ethnic backgrounds and English language proficiency in six rural schools in Terengganu, Malaysia were interviewed. In addition the teachers also from different rural schools…

  4. The Effects of Elementary Departmentalization on Mathematics Proficiency

    Science.gov (United States)

    Taylor-Buckner, Nicole C.

    2014-01-01

    Mathematics education in the elementary schools has experienced many changes in recent decades. With the curriculum becoming more complex as a result of each modification, immense pressure has been put on schools to increase student proficiency. The Common Core State Standards is the latest example of this. These revisions to the mathematics…

  5. Advisory Working Alliance, Perceived English Proficiency, and Acculturative Stress

    Science.gov (United States)

    Wei, Meifen; Tsai, Pei-Chun; Chao, Ruth Chu-Lien; Du, Yi; Lin, Shu-Ping

    2012-01-01

    The aim of this study was to examine the moderators of (a) general or cross-cultural advisory working alliances and (b) perceived English proficiency on the association between acculturative stress and psychological distress. A total of 143 East Asian international students completed an online survey. Results from a hierarchical regression…

  6. Linguistic Proficiency and Strategies on Reading Performance in English

    Science.gov (United States)

    Talebi, Seyed Hassan

    2015-01-01

    General English (L2) proficiency and reading strategies are believed to be highly effective in successful reading performance. However, available studies rarely investigated the combined effects of these two variables on successful reading. To fill this gap, 78 university students were divided into four groups of different degrees of these two…

  7. P-2 Years Targeted to Achieve Grade 3 Reading Proficiency

    Science.gov (United States)

    Gewertz, Catherine

    2011-01-01

    In a bid to help more students read proficiently in 3rd grade--a skill considered critical to their future educational success--new laws and initiatives springing up around the country require educators to step up their efforts to identify and help struggling readers even before they enter kindergarten. It's not unusual for states or school…

  8. W Boson Polarisation at LEP2

    CERN Document Server

    Abbiendi, G.; Akesson, P.F.; Alexander, G.; Allison, John; Amaral, P.; Anagnostou, G.; Anderson, K.J.; Arcelli, S.; Asai, S.; Axen, D.; Azuelos, G.; Bailey, I.; Barberio, E.; Barillari, T.; Barlow, R.J.; Batley, R.J.; Bechtle, P.; Behnke, T.; Bell, Kenneth Watson; Bell, P.J.; Bella, G.; Bellerive, A.; Benelli, G.; Bethke, S.; Biebel, O.; Boeriu, O.; Bock, P.; Boutemeur, M.; Braibant, S.; Brigliadori, L.; Brown, Robert M.; Buesser, K.; Burckhart, H.J.; Campana, S.; Carnegie, R.K.; Carter, A.A.; Carter, J.R.; Chang, C.Y.; Charlton, D.G.; Ciocca, C.; Couchman, J.; Csilling, A.; Cuffiani, M.; Dado, S.; De Roeck, A.; De Wolf, E.A.; Desch, K.; Dienes, B.; Donkers, M.; Dubbert, J.; Duchovni, E.; Duckeck, G.; Duerdoth, I.P.; Etzion, E.; Fabbri, F.; Feld, L.; Ferrari, P.; Fiedler, F.; Fleck, I.; Ford, M.; Frey, A.; Gagnon, P.; Gary, John William; Gaycken, G.; Geich-Gimbel, C.; Giacomelli, G.; Giacomelli, P.; Giunta, Marina; Goldberg, J.; Gross, E.; Grunhaus, J.; Gruwe, M.; Gunther, P.O.; Gupta, A.; Hajdu, C.; Hamann, M.; Hanson, G.G.; Harel, A.; Hauschild, M.; Hawkes, C.M.; Hawkings, R.; Hemingway, R.J.; Herten, G.; Heuer, R.D.; Hill, J.C.; Hoffman, Kara Dion; Horvath, D.; Igo-Kemenes, P.; Ishii, K.; Jeremie, H.; Jovanovic, P.; Junk, T.R.; Kanaya, N.; Kanzaki, J.; Karlen, D.; Kawagoe, K.; Kawamoto, T.; Keeler, R.K.; Kellogg, R.G.; Kennedy, B.W.; Klein, K.; Klier, A.; Kluth, S.; Kobayashi, T.; Kobel, M.; Komamiya, S.; Kramer, T.; Krieger, P.; von Krogh, J.; Kruger, K.; Kuhl, T.; Kupper, M.; Lafferty, G.D.; Landsman, H.; Lanske, D.; Layter, J.G.; Lellouch, D.; Lettso, J.; Levinson, L.; Lillich, J.; Lloyd, S.L.; Loebinger, F.K.; Lu, J.; Ludwig, A.; Ludwig, J.; Mader, W.; Marcellini, S.; Martin, A.J.; Masetti, G.; Mashimo, T.; Mattig, Peter; McKenna, J.; McPherson, R.A.; Meijers, F.; Menges, W.; Merritt, F.S.; Mes, H.; Michelini, A.; Mihara, S.; Mikenberg, G.; Miller, D.J.; Moed, S.; Mohr, W.; Mori, T.; Mutter, A.; Nagai, K.; Nakamura, I.; Nanjo, H.; Neal, H.A.; Nisius, R.; O'Neale, S.W.; Oh, A.; Okpara, A.; Oreglia, M.J.; Orito, S.; Pahl, C.; Pasztor, G.; Pater, J.R.; Pilcher, J.E.; Pinfold, J.; Plane, David E.; Poli, B.; Pooth, O.; Przybycien, M.; Quadt, A.; Rabbertz, K.; Rembser, C.; Renkel, P.; Roney, J.M.; Rosati, S.; Rozen, Y.; Runge, K.; Sachs, K.; Saeki, T.; Sarkisyan, E.K.G.; Schaile, A.D.; Schaile, O.; Scharff-Hansen, P.; Schieck, J.; Schoerner-Sadenius, Thomas; Schroder, Matthias; Schumacher, M.; Scott, W.G.; Seuster, R.; Shears, T.G.; Shen, B.C.; Sherwood, P.; Skuja, A.; Smith, A.M.; Sobie, R.; Soldner-Rembold, S.; Spano, F.; Stahl, A.; Strom, David M.; Strohmer, R.; Tarem, S.; Tasevsky, M.; Teuscher, R.; Thomson, M.A.; Torrence, E.; Toya, D.; Tran, P.; Trigger, I.; Trocsanyi, Z.; Tsur, E.; Turner-Watson, M.F.; Ueda, I.; Ujvari, B.; Vollmer, C.F.; Vannerem, P.; Vertesi, R.; Verzocchi, M.; Voss, H.; Vossebeld, J.; Waller, D.; Ward, C.P.; Ward, D.R.; Watkins, P.M.; Watson, A.T.; Watson, N.K.; Wells, P.S.; Wengler, T.; Wermes, N.; Wetterling, D.; Wilson, G.W.; Wilson, J.A.; Wolf, G.; Wyatt, T.R.; Yamashita, S.; Zer-Zion, D.; Zivkovic, Lidija

    2004-01-01

    Elements of the spin density matrix for W bosons in e+e- -> W+W- -> qqln events are measured from data recorded by the OPAL detector at LEP. This information is used calculate polarised differential cross-sections and to search for CP-violating effects. Results are presented for W bosons produced in e+e- collisions with centre-of-mass energies between 183 GeV and 209 GeV. The average fraction of W bosons that are longitudinally polarised is found to be (23.9 +- 2.1 +- 1.1)% compared to a Standard Model prediction of (23.9 +- 0.1)%. All results are consistent with CP conservation.

  9. Production of Single W Bosons at LEP

    CERN Document Server

    Acciarri, M; Aguilar-Benítez, M; Ahlen, S P; Alpat, B; Alcaraz, J; Alemanni, G; Allaby, James V; Aloisio, A; Alverson, G; Alviggi, M G; Ambrosi, G; Anderhub, H; Andreev, V P; Angelescu, T; Anselmo, F; Arefev, A; Azemoon, T; Aziz, T; Bagnaia, P; Baksay, L; Banerjee, S; Banicz, K; Barillère, R; Barone, L; Bartalini, P; Baschirotto, A; Basile, M; Battiston, R; Bay, A; Becattini, F; Becker, U; Behner, F; Berdugo, J; Berges, P; Bertucci, B; Betev, B L; Bhattacharya, S; Biasini, M; Biland, A; Bilei, G M; Blaising, J J; Blyth, S C; Bobbink, Gerjan J; Böck, R K; Böhm, A; Borgia, B; Bourilkov, D; Bourquin, Maurice; Braccini, S; Branson, J G; Brigljevic, V; Brock, I C; Buffini, A; Buijs, A; Burger, J D; Burger, W J; Busenitz, J K; Button, A M; Cai, X D; Campanelli, M; Capell, M; Cara Romeo, G; Caria, M; Carlino, G; Cartacci, A M; Casaus, J; Castellini, G; Cavallari, F; Cavallo, N; Cecchi, C; Cerrada-Canales, M; Cesaroni, F; Chamizo-Llatas, M; Chan, A; Chang, Y H; Chaturvedi, U K; Chekanov, S V; Chemarin, M; Chen, A; Chen, G; Chen, G M; Chen, H F; Chen, H S; Chéreau, X J; Chiefari, G; Chien, C Y; Cifarelli, Luisa; Cindolo, F; Civinini, C; Clare, I; Clare, R; Cohn, H O; Coignet, G; Colijn, A P; Colino, N; Commichau, V; Costantini, S; Cotorobai, F; de la Cruz, B; Csilling, Akos; Dai, T S; D'Alessandro, R; De Asmundis, R; Degré, A; Deiters, K; Della Volpe, D; Denes, P; De Notaristefani, F; DiBitonto, Daryl; Diemoz, M; Van Dierendonck, D N; Di Lodovico, F; Dionisi, C; Dittmar, Michael; Dominguez, A; Doria, A; Dova, M T; Drago, E; Duchesneau, D; Duinker, P; Durán, I; Dutta, S; Easo, S; Efremenko, Yu V; El-Mamouni, H; Engler, A; Eppling, F J; Erné, F C; Ernenwein, J P; Extermann, Pierre; Fabre, M; Faccini, R; Falciano, S; Favara, A; Fay, J; Fedin, O; Felcini, Marta; Fenyi, B; Ferguson, T; Ferroni, F; Fesefeldt, H S; Fiandrini, E; Field, J H; Filthaut, Frank; Fisher, P H; Forconi, G; Fredj, L; Freudenreich, Klaus; Furetta, C; Galaktionov, Yu; Ganguli, S N; García-Abia, P; Gau, S S; Gentile, S; Gheordanescu, N; Giagu, S; Goldfarb, S; Goldstein, J; Gong, Z F; Gougas, Andreas; Gratta, Giorgio; Grünewald, M W; Gupta, V K; Gurtu, A; Gutay, L J; Hartmann, B; Hasan, A; Hatzifotiadou, D; Hebbeker, T; Hervé, A; Van Hoek, W C; Hofer, H; Hong, S J; Hoorani, H; Hou, S R; Hu, G; Innocente, Vincenzo; Jenkes, K; Jin, B N; Jones, L W; de Jong, P; Josa-Mutuberria, I; Kasser, A; Khan, R A; Kamrad, D; Kamyshkov, Yu A; Kapustinsky, J S; Karyotakis, Yu; Kaur, M; Kienzle-Focacci, M N; Kim, D; Kim, D H; Kim, J K; Kim, S C; Kim, Y G; Kinnison, W W; Kirkby, A; Kirkby, D; Kirkby, Jasper; Kiss, D; Kittel, E W; Klimentov, A; König, A C; Korolko, I; Koutsenko, V F; Krämer, R W; Krenz, W; Kunin, A; Ladrón de Guevara, P; Laktineh, I; Landi, G; Lapoint, C; Lassila-Perini, K M; Laurikainen, P; Lebeau, M; Lebedev, A; Lebrun, P; Lecomte, P; Lecoq, P; Le Coultre, P; Le Goff, J M; Leiste, R; Leonardi, E; Levchenko, P M; Li Chuan; Lieb, E H; Lin, W T; Linde, Frank L; Lista, L; Liu, Z A; Lohmann, W; Longo, E; Lu, W; Lü, Y S; Lübelsmeyer, K; Luci, C; Luckey, D; Luminari, L; Lustermann, W; Ma Wen Gan; Maity, M; Majumder, G; Malgeri, L; Malinin, A; Maña, C; Mangeol, D J J; Mangla, S; Marchesini, P A; Marin, A; Martin, J P; Marzano, F; Massaro, G G G; McNally, D; McNeil, R R; Mele, S; Merola, L; Meschini, M; Metzger, W J; Von der Mey, M; Mi, Y; Mihul, A; Van Mil, A J W; Mirabelli, G; Mnich, J; Molnár, P; Monteleoni, B; Moore, R; Morganti, S; Moulik, T; Mount, R; Müller, S; Muheim, F; Muijs, A J M; Nagy, E; Nahn, S; Napolitano, M; Nessi-Tedaldi, F; Newman, H; Niessen, T; Nippe, A; Nisati, A; Nowak, H; Oh, Yu D; Opitz, H; Organtini, G; Ostonen, R; Palomares, C; Pandoulas, D; Paoletti, S; Paolucci, P; Park, H K; Park, I H; Pascale, G; Passaleva, G; Patricelli, S; Paul, T; Pauluzzi, M; Paus, C; Pauss, Felicitas; Peach, D; Pei, Y J; Pensotti, S; Perret-Gallix, D; Petersen, B; Petrak, S; Pevsner, A; Piccolo, D; Pieri, M; Pinto, J C; Piroué, P A; Pistolesi, E; Plyaskin, V; Pohl, M; Pozhidaev, V; Postema, H; Produit, N; Prokofev, D; Prokofiev, D O; Rahal-Callot, G; Rancoita, P G; Rattaggi, M; Raven, G; Razis, P A; Read, K; Ren, D; Rescigno, M; Reucroft, S; Van Rhee, T; Riemann, S; Riles, K; Robohm, A; Rodin, J; Roe, B P; Romero, L; Rosier-Lees, S; Rosselet, P; Van Rossum, W; Roth, S; Rubio, Juan Antonio; Ruschmeier, D; Rykaczewski, H; Salicio, J; Sánchez, E; Sanders, M P; Santocchia, A; Sarakinos, M E; Sarkar, S; Sassowsky, M; Schäfer, C; Shchegelskii, V; Schmidt-Kärst, S; Schmitz, D; Schmitz, P; Scholz, N; Schopper, Herwig Franz; Schotanus, D J; Schwenke, J; Schwering, G; Sciacca, C; Sciarrino, D; Servoli, L; Shevchenko, S; Shivarov, N; Shoutko, V; Shukla, J; Shumilov, E; Shvorob, A V; Siedenburg, T; Son, D; Sopczak, André; Smith, B; Spillantini, P; Steuer, M; Stickland, D P; Stone, H; Stoyanov, B; Strässner, A; Strauch, K; Sudhakar, K; Sultanov, G G; Sun, L Z; Susinno, G F; Suter, H; Swain, J D; Tang, X W; Tauscher, Ludwig; Taylor, L; Ting, Samuel C C; Ting, S M; Tonutti, M; Tonwar, S C; Tóth, J; Tully, C; Tuchscherer, H; Tung, K L; Uchida, Y; Ulbricht, J; Uwer, U; Valente, E; Van de Walle, R T; Vesztergombi, G; Vetlitskii, I; Viertel, Gert M; Vivargent, M; Völkert, R; Vogel, H; Vogt, H; Vorobev, I; Vorobyov, A A; Vorvolakos, A; Wadhwa, M; Wallraff, W; Wang, J C; Wang, X L; Wang, Z M; Weber, A; Wittgenstein, F; Wu, S X; Wynhoff, S; Xu, J; Xu, Z Z; Yang, B Z; Yang, C G; Yao, X Y; Ye, J B; Yeh, S C; You, J M; Zalite, A; Zalite, Yu; Zemp, P; Zeng, Y; Zhang, Z; Zhang, Z P; Zhou, B; Zhu, G Y; Zhu, R Y; Zichichi, Antonino; Ziegler, F

    1997-01-01

    We report on the observation of single W boson production in a data sample collected by the L3 detector at LEP2. The signal consists of large missing energy final states with a single energetic lepton or two hadronic jets. The cross-section is measured to be $0.61^{+0.43}_{-0.33} \\pm 0.05 \\; \\rm{pb}$ at the centre of mass energy $\\sqrt{s}=172 \\GeV{}$, consistent with the Standard Model expectation. From this measurement the following limits on the anomalous $\\gamma$WW gauge couplings are derived at 95\\% CL: $\\rm -3.6 < \\Delta \\kappa_\\gamma < 1.5$ and $\\rm -3.6 < \\lambda_\\gamma < 3.6$.

  10. QCD measurements with heavy quarks at LEP

    International Nuclear Information System (INIS)

    Maettig, P.

    1991-10-01

    Recent experimental results from LEP on strong interactions using heavy quarks are reviewed. By identifying bottom and charm decays, a model independent evidence for the string effect has been found together with a softer fragmentation function of gluons compared to quarks. The comparison of jet properties and the value of the strong coupling constant α s in bottom events and average events provides evidence for the flavour independence of QCD: α b0tt0m s /α s udsc = 1.00 ± 0.05 ± 0.06. The average scaled energy of charmed and bottom hadrons at Z 0 energies is found to be + )> = 0.507 +0.012 -0.015 ± 0.010 = 0.705 ± 0,008 ± 0.010. A comparison with results at lower c.m. energies exhibits significant scaling violations. These are interpreted in the context of various QCD calculations. (orig.)

  11. Tests of the electroweak theory at LEP

    International Nuclear Information System (INIS)

    Schaile, D.

    1994-01-01

    LEP offers a rich choice of tests of the electroweak theory such as the measurement of hadronic and leptonic cross sections, leptonic forward-backward asymmetries, τ polarization asymmetries, partial widths and forward-backward asymmetries of heavy quark flavours, of the inclusive q anti q charge asymmetry and of final state radiation in hadronic events. We discuss experimental aspects of these measurements and their theoretical parametrization and summarize the results available so far. We present several analyses which reveal specific aspects of the results, such as their constraints on Standard Model parameters and on new particles, the sensitivity to deviations from the Standard Model multiplet structure and an analysis in a framework which provides a model independent search for new physics. (orig.)

  12. Measurement of $\\tau$ polarisation at LEP

    CERN Document Server

    Acciarri, M; Aguilar-Benítez, M; Ahlen, S P; Alcaraz, J; Alemanni, G; Allaby, James V; Aloisio, A; Alviggi, M G; Ambrosi, G; Anderhub, H; Andreev, V P; Angelescu, T; Anselmo, F; Arefev, A; Azemoon, T; Aziz, T; Bagnaia, P; Baksay, L; Ball, R C; Banerjee, S; Banerjee, Sw; Banicz, K; Barczyk, A; Barillère, R; Barone, L; Bartalini, P; Baschirotto, A; Basile, M; Battiston, R; Bay, A; Becattini, F; Becker, U; Behner, F; Berdugo, J; Berges, P; Bertucci, B; Betev, B L; Bhattacharya, S; Biasini, M; Biland, A; Bilei, G M; Blaising, J J; Blyth, S C; Bobbink, Gerjan J; Böck, R K; Böhm, A; Boldizsar, L; Borgia, B; Bourilkov, D; Bourquin, Maurice; Boutigny, D; Braccini, S; Branson, J G; Brigljevic, V; Brock, I C; Buffini, A; Buijs, A; Burger, J D; Burger, W J; Busenitz, J K; Cai, X D; Campanelli, M; Capell, M; Cara Romeo, G; Carlino, G; Cartacci, A M; Casaus, J; Castellini, G; Cavallari, F; Cavallo, N; Cecchi, C; Cerrada-Canales, M; Cesaroni, F; Chamizo-Llatas, M; Chang, Y H; Chaturvedi, U K; Chekanov, S V; Chemarin, M; Chen, A; Chen, G; Chen, G M; Chen, H F; Chen, H S; Chen, M; Chiefari, G; Chien, C Y; Cifarelli, Luisa; Cindolo, F; Civinini, C; Clare, I; Clare, R; Cohn, H O; Coignet, G; Colijn, A P; Colino, N; Costantini, S; Cotorobai, F; de la Cruz, B; Csilling, Akos; Dai, T S; D'Alessandro, R; De Asmundis, R; Degré, A; Deiters, K; Denes, P; De Notaristefani, F; DiBitonto, Daryl; Diemoz, M; Van Dierendonck, D N; Di Lodovico, F; Dionisi, C; Dittmar, Michael; Dominguez, A; Doria, A; Dova, M T; Drago, E; Duchesneau, D; Duinker, P; Durán, I; Dutta, S; Easo, S; Efremenko, Yu V; El-Mamouni, H; Engler, A; Eppling, F J; Erné, F C; Ernenwein, J P; Extermann, Pierre; Fabre, M; Faccini, R; Falciano, S; Favara, A; Fay, J; Fedin, O; Felcini, Marta; Fenyi, B; Ferguson, T; Ferroni, F; Fesefeldt, H S; Fiandrini, E; Field, J H; Filthaut, Frank; Fisher, P H; Fisk, I; Forconi, G; Fredj, L; Freudenreich, Klaus; Furetta, C; Galaktionov, Yu; Ganguli, S N; García-Abia, P; Gau, S S; Gentile, S; Gerald, J; Gheordanescu, N; Giagu, S; Goldfarb, S; Goldstein, J; Gong, Z F; Gougas, Andreas; Gratta, Giorgio; Grünewald, M W; Gupta, V K; Gurtu, A; Gutay, L J; Haas, D; Hartmann, B; Hasan, A; Hatzifotiadou, D; Hebbeker, T; Hervé, A; Hirschfelder, J; Van Hoek, W C; Hofer, H; Hoorani, H; Hou, S R; Hu, G; Innocente, Vincenzo; Jenkes, K; Jin, B N; Jones, L W; de Jong, P; Josa-Mutuberria, I; Kasser, A; Khan, R A; Kamrad, D; Kamyshkov, Yu A; Kapustinsky, J S; Karyotakis, Yu; Kaur, M; Kienzle-Focacci, M N; Kim, D; Kim, D H; Kim, J K; Kim, S C; Kinnison, W W; Kirkby, A; Kirkby, D; Kirkby, Jasper; Kiss, D; Kittel, E W; Klimentov, A; König, A C; Kopp, A; Korolko, I; Koutsenko, V F; Krämer, R W; Krenz, W; Kunin, A; Lacentre, P E; Ladrón de Guevara, P; Landi, G; Lapoint, C; Lassila-Perini, K M; Laurikainen, P; Lavorato, A; Lebeau, M; Lebedev, A; Lebrun, P; Lecomte, P; Lecoq, P; Le Coultre, P; Lee, H J; Leggett, C; Le Goff, J M; Leiste, R; Leonardi, E; Levchenko, P M; Li Chuan; Lin, C H; Lin, W T; Linde, Frank L; Lista, L; Liu, Z A; Lohmann, W; Longo, E; Lu, W; Lü, Y S; Lübelsmeyer, K; Luci, C; Luckey, D; Luminari, L; Lustermann, W; Ma Wen Gan; Maity, M; Majumder, G; Malgeri, L; Malinin, A; Maña, C; Mangeol, D J J; Mangla, S; Marchesini, P A; Marin, A; Martin, J P; Marzano, F; Massaro, G G G; McNally, D; Mele, S; Merola, L; Meschini, M; Metzger, W J; Von der Mey, M; Mi, Y; Migani, D; Mihul, A; Van Mil, A J W; Milcent, H; Mirabelli, G; Mnich, J; Molnár, P; Monteleoni, B; Moore, R; Moulik, T; Mount, R; Muheim, F; Muijs, A J M; Nahn, S; Napolitano, M; Nessi-Tedaldi, F; Newman, H; Niessen, T; Nippe, A; Nisati, A; Nowak, H; Oh, Yu D; Opitz, H; Organtini, G; Ostonen, R; Palit, S; Palomares, C; Pandoulas, D; Paoletti, S; Paolucci, P; Park, H K; Park, I H; Pascale, G; Passaleva, G; Patricelli, S; Paul, T; Pauluzzi, M; Paus, C; Pauss, Felicitas; Peach, D; Pei, Y J; Pensotti, S; Perret-Gallix, D; Petersen, B; Petrak, S; Pevsner, A; Piccolo, D; Pieri, M; Piroué, P A; Pistolesi, E; Plyaskin, V; Pohl, M; Pozhidaev, V; Postema, H; Produit, N; Prokofev, D; Prokofiev, D O; Quartieri, J; Rahal-Callot, G; Raja, N; Rancoita, P G; Rattaggi, M; Raven, G; Razis, P A; Read, K; Ren, D; Rescigno, M; Reucroft, S; Van Rhee, T; Riemann, S; Riles, K; Rind, O; Robohm, A; Rodin, J; Roe, B P; Romero, L; Rosier-Lees, S; Rosselet, P; Van Rossum, W; Roth, S; Rubio, Juan Antonio; Ruschmeier, D; Rykaczewski, H; Salicio, J; Sánchez, E; Sanders, M P; Sarakinos, M E; Sarkar, S; Sauvage, G; Schäfer, C; Shchegelskii, V; Schmidt-Kärst, S; Schmitz, D; Schneegans, M; Scholz, N; Schopper, Herwig Franz; Schotanus, D J; Schwenke, J; Schwering, G; Sciacca, C; Sciarrino, D; Servoli, L; Shevchenko, S; Shivarov, N; Shoutko, V; Shukla, J; Shumilov, E; Shvorob, A V; Siedenburg, T; Son, D; Soulimov, V; Smith, B; Spillantini, P; Steuer, M; Stickland, D P; Stone, H; Stoyanov, B; Strässner, A; Sudhakar, K; Sultanov, G G; Sun, L Z; Susinno, G F; Suter, H; Swain, J D; Tang, X W; Tauscher, Ludwig; Taylor, L; Ting, Samuel C C; Ting, S M; Tonwar, S C; Tóth, J; Tully, C; Tuchscherer, H; Tung, K L; Uchida, Y; Ulbricht, J; Uwer, U; Valente, E; Vesztergombi, G; Vetlitskii, I; Viertel, Gert M; Vivargent, M; Vlachos, S; Völkert, R; Vogel, H; Vogt, H; Vorobev, I; Vorobyov, A A; Vorvolakos, A; Wadhwa, M; Wallraff, W; Wang, J C; Wang, X L; Wang, Z M; Weber, A; Wu, S X; Wynhoff, S; Xu, J; Xu, Z Z; Yang, B Z; Yang, C G; Yao, X Y; Ye, J B; Yeh, S C; You, J M; Zalite, A; Zalite, Yu; Zemp, P; Zeng, Y; Zhang, Z; Zhang, Z P; Zhou, B; Zhou, Y; Zhu, G Y; Zhu, R Y; Zichichi, Antonino; Ziegler, F

    1998-01-01

    Using the data collected with the L3 detector at LEP between 1990 and 1995, corresponding to an integrated luminosity of 149 pb$^{-1}$, the $\\tau$ longitudinal polarisation has been measured as a function of the production polar angle using the $\\tau$ decays \\thad\\ ($\\rm h = \\pi, \\rho, \\aone$) and \\tlep\\ ($\\rm \\ell = e, \\mu$). From this measurement the quantities æl~and \\at, which depend on the couplings of the electron and the $\\tau$ to the Z, are determined to be $\\ael = 0.1678 \\pm 0.0127 \\pm 0.0030 $ and $\\at = 0.1476 \\pm 0.0088 \\pm 0.0062$, consistent with the hypothesis of e--$\\tau$ universality. Under this assumption a value of $\\al = 0.1540 \\pm 0.0074 \\pm 0.0044 $ is obtained, yielding the value of the effective weak mixing angle $\\swsqb = 0.2306 \\pm 0.0011$.

  13. Measurement of the Tau Polarisation at LEP

    CERN Document Server

    Heister, A.; Barate, R.; De Bonis, I.; Decamp, D.; Ghez, Philippe; Goy, C.; Lees, J.P.; Merle, E.; Minard, M.N.; Pietrzyk, B.; Alemany, R.; Bravo, S.; Casado, M.P.; Chmeissani, M.; Crespo, J.M.; Fernandez, E.; Fernandez-Bosman, M.; Garrido, L.; Grauges, E.; Martinez, M.; Merino, G.; Miquel, R.; Mir, L.M.; Pacheco, A.; Ruiz, H.; Colaleo, A.; Creanza, D.; de Palma, M.; Iaselli, G.; Maggi, G.; Maggi, M.; Nuzzo, S.; Ranieri, A.; Raso, G.; Ruggieri, F.; Selvaggi, G.; Silvestris, L.; Tempesta, P.; Tricomi, A.; Zito, G.; Huang, X.; Lin, J.; Ouyang, Q.; Wang, T.; Xie, Y.; Xu, R.; Xue, S.; Zhang, J.; Zhang, L.; Zhao, W.; Abbaneo, D.; Azzurri, P.; Boix, G.; Buchmuller, O.; Cattaneo, M.; Cerutti, F.; Clerbaux, B.; Dissertori, G.; Drevermann, H.; Forty, R.W.; Frank, M.; Greening, T.C.; Hansen, J.B.; Harvey, John; Janot, P.; Jost, B.; Kado, M.; Mato, P.; Moutoussi, A.; Ranjard, F.; Rolandi, Gigi; Schlatter, D.; Schmitt, M.; Schneider, O.; Spagnolo, P.; Tejessy, W.; Teubert, F.; Tournefier, E.; Ward, J.; Wright, A.E.; Ajaltouni, Z.; Badaud, F.; Falvard, A.; Gay, P.; Henrard, P.; Jousset, J.; Michel, B.; Monteil, S.; Montret, J.C.; Pallin, D.; Perret, P.; Podlyski, F.; Hansen, J.D.; Hansen, J.R.; Hansen, P.H.; Nilsson, B.S.; Waananen, A.; Daskalakis, G.; Kyriakis, A.; Markou, C.; Simopoulou, E.; Vayaki, A.; Blondel, A.; Bonneaud, G.; Brient, J.C.; Rouge, A.; Rumpf, M.; Swynghedauw, M.; Verderi, M.; Videau, H.; Focardi, E.; Parrini, G.; Zachariadou, K.; Antonelli, A.; Antonelli, M.; Bencivenni, G.; Bologna, G.; Bossi, F.; Campana, P.; Capon, G.; Chiarella, V.; Laurelli, P.; Mannocchi, G.; Murtas, F.; Murtas, G.P.; Passalacqua, L.; Pepe-Altarelli, M.; Halley, A.W.; Lynch, J.G.; Negus, P.; O'Shea, V.; Raine, C.; Thompson, A.S.; Wasserbaech, S.; Cavanaugh, R.; Dhamotharan, S.; Geweniger, C.; Hanke, P.; Hansper, G.; Hepp, V.; Kluge, E.E.; Putzer, A.; Sommer, J.; Tittel, K.; Werner, S.; Wunsch, M.; Beuselinck, R.; Binnie, D.M.; Cameron, W.; Dornan, P.J.; Girone, M.; Marinelli, N.; Sedgbeer, J.K.; Thompson, J.C.; Ghete, V.M.; Girtler, P.; Kneringer, E.; Kuhn, D.; Rudolph, G.; Bouhova-Thacker, E.; Bowdery, C.K.; Finch, A.J.; Foster, F.; Hughes, G.; Jones, R.W.L.; Pearson, M.R.; Robertson, N.A.; Giehl, I.; Jakobs, K.; Kleinknecht, K.; Quast, G.; Renk, B.; Rohne, E.; Sander, H.G.; Wachsmuth, H.; Zeintiz, C.; Bonissent, A.; Carr, J.; Coyle, P.; Leroy, O.; Payre, P.; Rousseau, D.; Talby, M.; Aleppo, M.; Ragusa, F.; David, A.; Dietl, H.; Ganis, G.; Huttmann, K.; Lutjens, G.; Mannert, C.; Manner, W.; Moser, H.G.; Settles, R.; Stenzel, H.; Wiedenmann, W.; Wolf, G.; Boucrot, J.; Callot, O.; Chen, S.; Davier, M.; Duflot, L.; Grivaz, J.F.; Heusse, P.; Jacholkowska, A.; Lefrancois, J.; Nikolic, Irina; Veillet, J.J.; Videau, I.; Yuan, C.; Bagliesi, Giuseppe; Boccali, T.; Calderini, G.; Ciulli, V.; Foa, L.; Giassi, A.; Ligabue, F.; Messineo, A.; Palla, F.; Sanguinetti, G.; Sciaba, A.; Sguazzoni, G.; Tenchini, R.; Venturi, A.; Verdini, P.G.; Blair, G.A.; Cowan, G.; Green, M.G.; Medcalf, T.; Strong, J.A.; Teixeira-Dias, P.; von Wimmersperg-Toeller, J.H.; Clifft, R.W.; Edgecock, T.R.; Norton, P.R.; Tomalin, I.R.; Bloch-Devaux, Brigitte; Colas, P.; Emery, S.; Kozanecki, W.; Lancon, E.; Lemaire, M.C.; Locci, E.; Perez, P.; Rander, J.; Renardy, J.F.; Roussarie, A.; Schuller, J.P.; Schwindling, J.; Trabelsi, A.; Vallage, B.; Konstantinidis, N.; Litke, A.M.; Taylor, G.; Booth, C.N.; Cartwright, S.; Combley, F.; Lehto, M.; Thompson, L.F.; Affholderbach, K.; Boehrer, Armin; Brandt, S.; Grupen, C.; Misiejuk, A.; Ngac, A.; Prange, G.; Sieler, U.; Giannini, G.; Rothberg, J.; Armstrong, S.R.; Cranmer, K.; Elmer, P.; Ferguson, D.P.S.; Gao, Y.; Gonzalez, S.; Hayes, O.J.; Hu, H.; Jin, S.; Kile, J.; McNamara, P.A., III; Nielsen, J.; Orejudos, W.; Pan, Y.B.; Saadi, Y.; Scott, I.J.; Walsh, J.; Wu, Sau Lan; Wu, X.; Zobernig, G.

    2001-01-01

    The polarisation of $\\tau$'s produced in Z decay is measured using 160 pb$^{-1}$ of data accumulated at LEP by the ALEPH detector between 1990 and 1995. The variation of the polarisation with polar angle yields the two parameters ${\\cal A}_e = 0.1504 \\pm 0.0068 $ and ${\\cal A}_{\\tau} = 0.1451 \\pm 0.0059$ which are consistent with the hypothesis of $e$-$\\tau$ universality. Assuming universality, the value ${\\cal A}_{e\\mbox{-}\\tau} = 0.1474 \\pm 0.0045$ is obtained from which the effective weak mixing angle $\\sin^2 {\\theta_{\\mathrm{W}}^{\\mathrm{eff}}} =0.23147 \\pm 0.00057 $ is derived.

  14. National Radon Contractor Proficiency (RCP) program. Proficiency report, September 1991

    International Nuclear Information System (INIS)

    1991-09-01

    The primary objective of the U.S. Environmental Protection Agency's (EPA) efforts to address the indoor radon problem is to reduce radon levels in buildings throughout the country. Achieving this objective requires a nationwide supply of capable radon mitigation contractors. In the Indoor Radon Abatement Act of 1988, Congress authorized EPA to establish a program to evaluate radon mitigation contractors and to provide this information to the public in cooperation with the States. The Radon Contractor Proficiency (RCP) Program was developed to assist States, EPA Regions, local government officials, and the public in selecting contractors who have demonstrated their proficiency in reducing indoor radon levels. The program is managed by the EPA Office of Radiation Programs' Radon Division. Under this voluntary program, radon contractors demonstrate their proficiency by meeting specific Program requirements. Individual contractors who meet these requirements are then listed in the Report

  15. National Radon Contractor Proficiency (RCP) Program. Proficiency report, January 1992

    International Nuclear Information System (INIS)

    1992-01-01

    The primary objective of the U.S. Environmental Protection Agency's (EPA) efforts to address the indoor radon problem is to reduce radon levels in buildings throughout the country. Achieving the objective requires a nationwide supply of capable radon mitigation contractors. In the Indoor Radon Abatement Act of 1988, Congress authorized EPA to establish a program to evaluate radon mitigation contractors and to provide the information to the public in cooperation with the States. The Radon Contractor Proficiency (RCP) Program was developed to assist States, EPA Regions, local government officials, and the public in selecting contractors who have demonstrated their proficiency in reducing indoor radon levels. The program is managed by the EPA Office of Radiation Programs' Radon Division. Under the voluntary program, radon contractors demonstrate their proficiency by meeting specific Program requirements. Individual contractors who meet these requirements are then listed in the Report

  16. An Investigation of the Use of Listening Strategies and Listening Performance of Proficient and Nonproficient Language Learners

    Science.gov (United States)

    Piamsai, Chatraporn

    2014-01-01

    This study was an attempt to investigate how proficient and non-proficient learners used listening strategies to complete a listening task. 65 third-year Chulalongkorn University Commerce and Accountancy students participated in the first stage of the quantitative data collection. 18 students were randomly selected from the group for more in depth…

  17. The Limited English Proficiency Patient Family Advocate Role: Fostering Respectful and Effective Care Across Language and Culture in a Pediatric Oncology Setting.

    Science.gov (United States)

    Gil, Stephanie; Hooke, Mary C; Niess, Dawn

    2016-01-01

    Patients and families with limited English proficiency (LEP) face a multitude of barriers both inside and outside the hospital walls. These barriers can contribute to difficulty accessing care and understanding/adhering to treatment recommendations, ultimately placing them at higher risk for poorer outcomes than their English-speaking counterparts. The LEP Patient Family Advocate role was created with the aim of improving access, promoting effective communication, and equalizing care for children with cancer from families with LEP. The goal of this mixed methods study was to describe the level of satisfaction and experiences of parents and health care providers who used the LEP Patient Family Advocate while receiving or providing care. Twelve parents and 15 health care providers completed quantitative surveys and an open-ended question about their experiences. High levels of satisfaction were reported. Themes about the role from qualitative responses included its positive effect on communication, trust, and connectedness between parents and staff. Continuity of care and safety were improved, and parents thought the role helped decrease their stress. The LEP Patient Family Advocate has a positive influence on family-centered cultural care. © 2015 by Association of Pediatric Hematology/Oncology Nurses.

  18. A comparative study of the economic and social functioning of Vietnamese-Australians with low English proficiency living with psychotic illness.

    Science.gov (United States)

    Stolk, Yvonne; Sevar, Katherine; Tran, Nga; Mancuso, Serafino G; Chopra, Prem; Castle, David

    2015-06-01

    Because national surveys of people living with psychotic disorders tend to exclude people with low English proficiency (LEP), little is known of their economic and social functioning. Culturally influenced explanatory models may result in delayed presentation and poorer functioning. The study aimed to compare the functioning of LEP Vietnamese-Australian and Australian-born patients with psychosis and to investigate the Vietnamese-Australians' pathways to care. In all, 19 LEP Vietnamese-Australians, previously excluded from the Australian Survey of High Impact Psychosis (SHIP), were matched with 15 Australian-born controls, and interviewed by a Vietnamese bilingual mental health professional using the SHIP Interview Schedule. The Vietnamese-Australian patients were significantly more likely to live with family, rate spirituality as important and participate in community rehabilitation programs. Their work, social and independent functioning, was better than the controls. The groups did not differ in mental health services received and satisfaction with services. Although half of Vietnamese-Australians attributed mental illness to supernatural, among other causes, none had consulted traditional healers. Despite LEP, Vietnamese-Australians with psychosis showed comparable or better functioning than Australian-born patients. Further investigation is recommended into LEP patients' clinical and social recovery and the role of language communities' support networks. © The Author(s) 2014.

  19. Language proficiency and nursing registration.

    Science.gov (United States)

    Müller, Amanda

    2016-02-01

    This discussion paper focuses on English proficiency standards for nursing registration in Australia, how Australia has dealt with the issue of language proficiency, and the factors which have led to the establishment of the current language standards. Also, this paper will provide a comparison of the two language tests that are currently accepted in Australia (OET and IELTS), including the appropriateness of these tests and the minimum standards used. The paper will also examine the use of educational background as an indicator of language proficiency. Finally, communication-based complaints in the post-registration environment will be explored, and some discussion will be provided about why pre-registration measures might have failed to prevent such problematic situations from occurring. Copyright © 2015 Elsevier Ltd. All rights reserved.

  20. Performance of a shashlik calorimeter at LEP II

    CERN Document Server

    Ferrari, P; Klovning, A; Maeland, O A; Stugu, B; Benvenuti, Alberto C; Giordano, V; Guerzoni, M; Navarria, Francesco Luigi; Verardi, M G; Camporesi, T; Bozzo, M; Cereseto, R; Barreira, G; Espirito-Santo, M C; Maio, A; Onofre, A; Peralta, L; Pimenta, M; Tomé, B; Carling, H; Falk, E; Hedberg, V; Jarlskog, G; Kronkvist, I J; Bonesini, M; Chignoli, F; Gumenyuk, S A; Leoni, R; Mazza, R; Negri, P; Paganoni, M; Petrovykh, L P; Terranova, F; Dharmasiri, D R; Nossum, B; Read, A L; Skaali, T B; Castellani, L; Pegoraro, M; Fenyuk, A; Guz, Yu; Karyukhin, A N; Konoplyannikov, A K; Obraztsov, V F; Shalanda, N A; Vlasov, E; Zaitsev, A; Bigi, M; Cassio, V; Gamba, D; Migliore, E; Romero, A; Simonetti, L; Torassa, E; Trapani, P P; Bari, M D; Della Ricca, G; Lanceri, L; Poropat, P; Prest, M; Vallazza, E

    1999-01-01

    The small angle tile calorimeter (STIC) is a sampling lead- scintillator calorimeter, built with "shashlik" technique. Results are presented from extensive studies of the detector performance at LEP. (5 refs).

  1. Interlocks for the LEP Radio-Frequency System

    CERN Document Server

    Livesley, S

    2000-01-01

    Interlocks for the LEP RF system totalled more than 7000. They provided protection for the personnel and a wide range of equipment: copper cavities, superconducting cavities, klystrons and high voltage equipment. The interlock system layout, functionality and components are described.

  2. CERN: End of LEP's Z era

    International Nuclear Information System (INIS)

    Anon.

    1995-01-01

    Full text: Achapter of history at CERN's LEP electron-positron collider closed in October when the four big experiments, Aleph, Delphi, L3 and Opal, logged their final data at the Z energy, just over six years after LEP's first Z was detected. The LEP Z era has been one of great success, both in terms of physics results and the advances which have been made with the machine itself. LEP now takes a step towards becoming LEP2, when the energy is wound up from around 45 GeV to about 70 GeV per beam (September, page 6). By the end of LEP's 1995 run, each of the four LEP experiments had seen almost five million Zs. Now the spotlight at LEP shifts to producing pairs of W particles, the electrically charged counterparts of the Z. LEP's first Zs were recorded in August 1989, one month after the machine's first circulating beam. The 30,000 Z decays recorded by each experiment in 1989 confirmed that matter comes in just three distinct families of quarks and leptons. The values of the Z mass and width quoted in 1990 were 91.161 ± 0.031 GeV and 2.534 ± 0.027 GeV. By the beginning of 1995, these had been fine-tuned to the extraordinary accuracy of 91.1884 ± 0.0022 GeV and 2.4963 ± 0.0032 GeV, and when data from this year's run is included, will be even better. These results, combined with precision data from neutrino experiments and from Fermilab's Tevatron protonantiproton collider, have put the Standard Model of quarks and leptons through its most gruelling test yet. Right from the start, collaboration between LEP experiments and the accelerator team has been close, with frequent scheduling meetings determining how the machine is run. For the first few years, LEP ran on a diet of four bunches of electrons and four of positrons, but by the end of 1992, a way had been found to increase the luminosity by squeezing in more bunches. In 1993, the 'pretzel' scheme (October 1992, page 17), so called because of the shape traced out by

  3. LEP a new instrument for high-energy physics

    CERN Document Server

    Udo, Fred

    1981-01-01

    Describes the LEP project of CERN. LEP (large electron/positron storage ring) is to be used to investigate electron/positron collisions at 44 to 260 GeV. The circumference of the ring will be 30.6 km. The theory is outlined. Two circular systems of beam bundles (electrons and positrons) move in opposite directions and are accelerated and focused (to 0.4 mm diameter) until collisions take place. (11 refs).

  4. Advances in particle physics: the LEP contribution, Conclusions and perspectives

    CERN Document Server

    Richard, F

    2002-01-01

    LEP1 precision measurements, combined with LEP2 searches for the Higgs boson, define the framework for future investigations in subatomic physics. In particular they define the energy and the luminosity which are needed at a future e sup + e sup - collider to settle the issue of the origin of mass and to complement the LHC on the various scenarios proposed beyond the Standard Model. (authors)

  5. Summary of the Photon Structure Functions - Measurements at LEP

    International Nuclear Information System (INIS)

    Przybycien, M.

    2002-01-01

    The present status of the photon structure functions measurements at LEP is discussed. The short introduction to the kinematics and theoretical framework of the structure functions measurements at LEP is given first. Then follow presentations of the most important measurements, ranging from the QED photon structure function, through the hadronic structure functions of real and virtual photons, and at the end the first measurement of the electron structure function is shown. (author)

  6. Searches for Higgs bosons and supersymmetry at LEP

    CERN Document Server

    van Vulpen, I B

    2004-01-01

    This note presents an overview of the main results from searches for Higgs bosons and supersymmetry at LEP. Most of the results presented here are combined results from the four LEP experiments (ALEPH, DELPHI, L3 and OPAL). No signal is observed and the (negative) search results are interpreted in a wide class of models allowing parameter space to be excluded. All limits are set at 95% CL.

  7. LEP asymmetries and fits of the standard model

    International Nuclear Information System (INIS)

    Pietrzyk, B.

    1994-01-01

    The lepton and quark asymmetries measured at LEP are presented. The results of the Standard Model fits to the electroweak data presented at this conference are given. The top mass obtained from the fit to the LEP data is 172 -14-20 +13+18 GeV; it is 177 -11-19 +11+18 when also the collider, ν and A LR data are included. (author). 10 refs., 3 figs., 2 tabs

  8. Performance of the upgraded small angle tile calorimeter at LEP

    CERN Document Server

    Alvsvaag, S J; Barreira, G; Benvenuti, Alberto C; Bigi, M; Bonesini, M; Bozzo, M; Camporesi, T; Carling, H; Cassio, V; Castellani, L; Cereseto, R; Chignoli, F; Della Ricca, G; Dharmasiri, D R; Espirito-Santo, M C; Falk, E; Fenyuk, A; Ferrari, P; Gamba, D; Giordano, V; Guz, Yu; Guerzoni, M; Gumenyuk, S A; Hedberg, V; Jarlskog, G; Karyukhin, A N; Klovning, A; Konoplyannikov, A K; Kronkvist, I J; Lanceri, L; Leoni, R; Maeland, O A; Maio, A; Mazza, R; Migliore, E; Navarria, Francesco Luigi; Nossum, B; Obraztsov, V F; Onofre, A; Paganoni, M; Pegoraro, M; Peralta, L; Petrovykh, L P; Pimenta, M; Poropat, P; Prest, M; Read, A L; Romero, A; Shalanda, N A; Simonetti, L; Skaali, T B; Stugu, B; Terranova, F; Tomé, B; Torassa, E; Trapani, P P; Verardi, M G; Vallazza, E; Vlasov, E; Zaitsev, A

    1998-01-01

    The small angle tile calorimeter (STIC) provides calorimetric coverage in the very forward region of the DELPHI experiment at the CERN LEP collider. The structure of the calorimeters, built with so- called "shashlik" technique, $9 allows the insertion of tracking detectors within the sampling structure, in order to make it possible to determine the direction of the showering particle. Presented here are some results demonstrating the performance of the $9 calorimeter and of these tracking detectors at LEP. (5 refs).

  9. Paris Chamber of Commerce Examinations and ACTFL/ETS Proficiency Levels.

    Science.gov (United States)

    Cummins, Patricia W.

    1987-01-01

    Compares the Paris Chamber of Commerce Exams (both certificate and diploma levels) and the ACTFL Guidelines for language proficiency for the benefit of language teachers. Teaching strategies are suggested for preparing students for the Chamber of Commerce exams. (LMO)

  10. The Mixed-Proficiency Language Class: Consequences for Students, Professors and the Institution (La clase de varios niveles. Consecuencias para los estudiantes, los profesores y para la institución

    Directory of Open Access Journals (Sweden)

    Lenna Barrantes Elizondo

    2014-11-01

    Full Text Available This article examines the effects of a mixed-proficiency language class on the participation, progress, retention and classroom management with students enrolled in the Associate Program in English at Universidad Nacional (Brunca Campus. The social and economic consequences that this phenomenon may have on the university and the community are also analyzed. Data were collected using focus groups, interviews, questionnaires, structured observations and artifacts. Se examinan los efectos de reunir estudiantes con varios niveles lingüísticos en una sola clase de inglés como lengua extranjera y sus efectos en la participación, progreso, retención y el desarrollo de la clase en el Diplomado en Inglés de la Universidad Nacional, Sede Regional Brunca. Se analizan las consecuencias sociales y económicas en la institución y en la comunidad. La información se recolectó de grupos focales, entrevistas, cuestionarios, observaciones estructuradas y artefactos.

  11. National Radon Contractor Proficiency Program. Proficiency report, October 1990

    International Nuclear Information System (INIS)

    1990-10-01

    The report lists those individual contractors in the United States who have met the requirements of the Radon Contractor Proficiency (RCP) Program as of August 18, 1990. These requirements are designed to provide minimum proficiency criteria for individuals who design and supervise the installation of radon mitigation systems in buildings. (Some States have more stringent requirements as part of their radon certification programs. The States should be consulted directly for details on their programs; see Section 5 for a list of State radon contacts). The RCP Program measures the proficiency of an individual contractor, not their company. Therefore, users of the report who select a mitigation firm should ensure that the services are provided by the listed contractor. The National RCP Program does not accredit mitigation contractors, nor does it certify, recommend, or endorse participating companies. Only the listed contractor, not their company of affilation, are deemed proficient. The inclusion of a contractor in the report should not be interpreted as a certification or accreditation of the individual or affiliated company

  12. Effectiveness of Oral Proficiency in English for Secondary Schools (OPS-English) Programme in Improving English Language Vocabulary among Secondary School Students

    Science.gov (United States)

    Singh, Manesha Kaur Rajendra; Singh, Manjet Kaur Mehar; Eng, Lin Siew

    2015-01-01

    Speaking is an important skill that needs to be mastered as it is the best way to communicate with other people in order to deliver opinions and express ideas, but the fact is that secondary school students' ability in speaking English is low in Malaysia. It is caused by several factors such as lack of vocabulary, poor pronunciation, weak grammar…

  13. Using Eye Tracking to Investigate First Year Students' Digital Proficiency and Their Use of a Learning Management System in an Open Distance Environment

    Science.gov (United States)

    Mabila, Jabulisiwe; Gelderblom, Helene; Ssemugabi, Samuel

    2014-01-01

    The internet gives individuals access to learning through online technologies. The prolific use of Learning Management Systems (LMSs) in higher education institutions makes Information and Communication Technology (ICT) skills or e-skills very important. ICT skill levels have been positively related to students' effectiveness and efficiency in…

  14. Establishing Proficiency Levels for the Delaware Student Testing Program in Science and Social Studies, Grades 4 & 6. Report and Recommendations to the Delaware State Board of Education.

    Science.gov (United States)

    Delaware State Dept. of Education, Dover. Assessment and Accountability Branch.

    This document contains the results of a standard setting conducted in January 2002 on the Delaware Student Testing Program (DSTP) Science and Social Studies tests at grades 4 and 6. Each standard setting process entailed convening four groups, one for each grade level and content area, and each group met for 2 days. At the standard setting judges…

  15. Discrepancies between perceptions of English proficiency and ...

    African Journals Online (AJOL)

    multilingual awareness pedagogy” embedded in Dörnyei's (2009) L2 Motivational Self System theory. Key words: self-reported perceptions, language proficiency, English proficiency, multilingualism, pedagogy, resilience, L2 Motivational Self System ...

  16. The CERN LEP-SPS Librarian system

    International Nuclear Information System (INIS)

    Corniaux, C.; Morpurgo, G.

    1990-01-01

    The complexity of a software working environment, such as the control system for the SPS and LEP accelerators, requires a considerable management effort. The software needed to run the machines is continuously evolving, as new releases of application and system programs are introduced rather frequency. Ideally the management effort must coordinate all the different software developers and their users (the machine operating team). A software tool, the Librarian, has been written to help them in performing this task. Its ultimate goal is to enable the accelerator operators to retain control of all the software running in the control system. All the source files needed to produce a piece of running software (a 'product') are saved together, and can be retrieved either individually or as a whole. Management of the different versions of a product is also implemented, as well as a scheme for protections and access rights depending on the type of user (Librarian manager, application manager or software developer). The data base ORACLE has been used to maintain logical links between files saved under the Librarian. (orig.)

  17. ACCESS TO LEP POINT 5, CESSY (FRANCE)

    CERN Multimedia

    1999-01-01

    At the public environmental impact enquiry for the LHC project, the municipal authorities at Cessy suggested creating a new approach road to the civil engineering site (Point5) to ensure that materials deliveries by road are kept well away from housing along the Route de la Plaine.Following this recommendation, a track called the Chemin du Milieu has been upgraded into a road, and has been made available for the sole use of construction firms involved in building work at Point 5.The 'Dragados-Seli' consortium will be in charge of site surveillance for the new approach road.With effect from 29 March 1999, the present entrance will be closed to civil engineering firms and reserved for LEP installations maintenance services under the SL Division site managers, Mr. R. Spigato (tel. 160374) and P. Rey (tel. 160375).For obvious security reasons, those needing to use Point 5 are requested to keep the gate locked, even while they are on site, so as to prevent unauthorised persons from gaining access to the civil engi...

  18. Photon radiation from quarks at LEP

    CERN Document Server

    Thompson, J C

    1994-01-01

    Earlier measurements at LEP of isolated hard photons in hadronic zo decays attributed to radiation from primary quark pairs, have been extended in the ALEPH experiment to include their production inside hadron jets. Events are selected where all particles combine "democratically" to form 2 hadron jets, one of which contains a photon with a fractional energy z � 0. 7. After the statistical subtraction of events arising from non-prompt photons, the quark-to-photon fragmentation function, D(z), is extracted directly from the measured prompt production rate. Taking into account the perturbative contributions to D(z) obtained in an O(aa,) MS renormalisation scheme enables the unknown non-perturbative component of D(z) to be determined at high z. This measurement provides a better description of quark bremmstrahlung than hitherto employed in high energy hadron-hadron collisions. A updated analysis is also presented from OPAL of comparisons between 1-jet plus isolated photon rates and different QCD matrix element ...

  19. Search for radions at LEP2

    International Nuclear Information System (INIS)

    Abbiendi, G.; Ainsley, C.; Akesson, P.F.

    2005-01-01

    A new scalar resonance, called the radion, with couplings to fermions and bosons similar to those of the Higgs boson, is predicted in the framework of Randall-Sundrum models, proposed solutions to the hierarchy problem with one extra dimension. An important distinction between the radion and the Higgs boson is that the radion would couple directly to gluon pairs, and in particular its decay products would include a significant fraction of gluon jets. The radion has the same quantum numbers as the Standard Model (SM) Higgs boson, and therefore they can mix, with the resulting mass eigenstates having properties different from those of the SM Higgs boson. Existing searches for the Higgs bosons are sensitive to the possible production and decay of radions and Higgs bosons in these models. For the first time, searches for the SM Higgs boson and flavour-independent and decay-mode independent searches for a neutral Higgs boson are used in combination to explore the parameter space of the Randall-Sundrum model. In the dataset recorded by the OPAL experiment at LEP, no evidence for radion or Higgs particle production was observed in any of those searches at centre-of-mass energies up to 209 GeV. The results are used to set limits on the radion and Higgs boson masses. For all parameters of the Randall-Sundrum model, the data exclude masses below 58 GeV for the mass eigenstate which becomes the Higgs boson in the no-mixing limit

  20. CERN: A hinge between LEP and the LHC

    International Nuclear Information System (INIS)

    Anon.

    1995-01-01

    Later this year, if all goes well, the beam energy of CERN's LEP electron-positron collider should be increased to around 70 GeV per beam (collision energy 140 GeV), giving a foretaste of things to come. Since 1989, the 27-kilometre ring has been operating around 45 GeV per beam to feed its four physics experiments with a steady diet of Z particles, the electrically neutral carriers of the weak nuclear force. This has given precision results on vital parameters of the Standard Model. Meanwhile work has been steadily pushing ahead to upgrade LEP to LEP2, installing superconducting radiofrequency cavities (January 1994, page 6) and ancillary cryogenics equipment to boost the machine's energy and reach new areas of physics interest. The initial goal is to produce pairs of W particles, the electrically charged counterparts of the Z. As far as the machine is concerned, at these higher energies, the 'beambeam' interaction between the contra-rotating electrons and positrons is reduced, so more particles can be pumped into the ring. To achieve this, LEP has switched to the new 'bunch train' scheme (see page 14) each train containing several 'carriages' (bunches) of particles. To attain its physics objectives, LEP2's target is 500 inverse picobarns of integrated luminosity over the next few years. This is a challenge as LEP's integrated luminosity to date (since the machine was commissioned in 1989) is some 160 inverse picobarns, itself viewed as no mean achievement. To reach higher energies, the accelerating power at LEP is being increased with installation of superconducting radiofrequency cavities. After initial trials with solid niobium, LEP2 relies on the more reliable performance provided by copper, with its better heat conduction properties, coated with a superconducting film of niobium. Even so heroic preprocessing is required to ensure optimal performance. After initial trials revealed welding weaknesses, the

  1. LEP Magnets Get a Second Lease of Life

    CERN Multimedia

    2001-01-01

    Removed one minute, recycled the next! Around 900 yokes from the LEP dipole magnets have been re-used as building material. 906 yokes from the LEP dipole magnets have been incorporated in the foundations of the new Building 954, where they have been used to create the underfloor space and reinforcements. The recycling of LEP is already under way. Over half of CERN's accelerator has been dismantled so far, and parts of its magnets are already beginning a new life: since 16 May, some of the LEP dipole magnet yokes have been re-used as building material. The dipole yokes, the only ones of their kind, are made up of steel plates and layers of concrete sandwiched together, thus forming blocks of reinforced concrete. It would be a painstaking task to separate the basic materials for re-use, which led to the idea of using the yokes intact as reinforcements. 906 LEP yokes have gone into the foundations of the brand-new Building 954 on the Prévessin site. They have been used to build the underfloor space ...

  2. LEP shuts down after eleven years of forefront research

    CERN Multimedia

    2000-01-01

    After extended consultation with the appropriate scientific committees, CERN’s Director-General Luciano Maiani announced today that the LEP accelerator had been switched off for the last time. LEP was scheduled to close at the end of September 2000 but tantalising signs of possible new physics led to LEP’s run being extended until 2 November. At the end of this extra period, the four LEP experiments had produced a number of collisions compatible with the production of Higgs particles with a mass of around 115 GeV. These events were also compatible with other known processes. The new data was not sufficiently conclusive to justify running LEP in 2001, which would have inevitable impact on LHC construction and CERN’s scientific programme. The CERN Management decided that the best policy for the Laboratory is to proceed full-speed ahead with the Large Hadron Collider (LHC) project. Steve Myers, Head of SL Division, with members of the LEP team, pulling the symbolic rope to swich off the accelerator. CERN Co...

  3. Increased Access to Professional Interpreters in the Hospital Improves Informed Consent for Patients with Limited English Proficiency.

    Science.gov (United States)

    Lee, Jonathan S; Pérez-Stable, Eliseo J; Gregorich, Steven E; Crawford, Michael H; Green, Adrienne; Livaudais-Toman, Jennifer; Karliner, Leah S

    2017-08-01

    Language barriers disrupt communication and impede informed consent for patients with limited English proficiency (LEP) undergoing healthcare procedures. Effective interventions for this disparity remain unclear. Assess the impact of a bedside interpreter phone system intervention on informed consent for patients with LEP and compare outcomes to those of English speakers. Prospective, pre-post intervention implementation study using propensity analysis. Hospitalized patients undergoing invasive procedures on the cardiovascular, general surgery or orthopedic surgery floors. Installation of dual-handset interpreter phones at every bedside enabling 24-h immediate access to professional interpreters. Primary predictor: pre- vs. post-implementation group; secondary predictor: post-implementation patients with LEP vs. English speakers. Primary outcomes: three central informed consent elements, patient-reported understanding of the (1) reasons for and (2) risks of the procedure and (3) having had all questions answered. We considered consent adequately informed when all three elements were met. We enrolled 152 Chinese- and Spanish-speaking patients with LEP (84 pre- and 68 post-implementation) and 86 English speakers. Post-implementation (vs. pre-implementation) patients with LEP were more likely to meet criteria for adequately informed consent (54% vs. 29%, p = 0.001) and, after propensity score adjustment, had significantly higher odds of adequately informed consent (AOR 2.56; 95% CI, 1.15-5.72) as well as of each consent element individually. However, compared to post-implementation English speakers, post-implementation patients with LEP had significantly lower adjusted odds of adequately informed consent (AOR, 0.38; 95% CI, 0.16-0.91). A bedside interpreter phone system intervention to increase rapid access to professional interpreters was associated with improvements in patient-reported informed consent and should be considered by hospitals seeking to improve

  4. Performance-Based Task Assessment of Higher-Order Proficiencies in Redesigned STEM High Schools

    Science.gov (United States)

    Ernst, Jeremy V.; Glennie, Elizabeth; Li, Songze

    2017-01-01

    This study explored student abilities in applying conceptual knowledge when presented with structured performance tasks. Specifically, the study gauged proficiency in higher-order applications of students enrolled in earth and environmental science or biology. The student sample was drawn from a Redesigned STEM high school model where a tested…

  5. LEP Dismantling - a first Step into New Era

    CERN Multimedia

    2000-01-01

    The aim of the project is to remove the LEP machine and most of the services from the underground areas in order to install the LHC within the time constraints of its civil engineering and installation programmes The dismantling of LEP will be the first project to be executed under the new INB (Installation Nucléaire de Base) convention for the LHC. This talk will give an overview of the LEP Dismantling project covering traceability, planning, infrastructure and execution. It will explain what it means for our accelerators to be classified as INB's and will introduce the changes in working and safety procedures, which will be enforced from the beginning of October. Note: The presentation will be made in French with the transparencies in English.

  6. Large hadron collider in the LEP tunnel. Proceedings. Vol. 2

    International Nuclear Information System (INIS)

    1984-01-01

    A Workshop, jointly organized by ECFA and CERN, took place at Lausanne and at CERN in March 1984 to study various options for a pp (or panti p) collider which might be installed at a later data alongside LEP in the LEP tunnel. Following the exploration of e + e - physics up to the highest energy now foreseeable, this would open up the opportunity to investigate hadron collisions in the new energy range of 10 to 20 TeV in the centre of mass. These proceedings put together the documents prepared in connection with this Workshop. They cover possible options for a Large Hadron Collider (LHC) in the LEP tunnel, the physics case as it stands at present, and studies of experimental possibilities in this energy range with luminosities as now considered. See hints under the relevant topics. (orig./HSI)

  7. The Large Hadron Collider in the LEP tunnel

    International Nuclear Information System (INIS)

    Brianti, G.; Huebner, K.

    1987-01-01

    The status of the studies for the CERN Large Hadron Collider (LHC) is described. This collider will provide proton-proton collisions with 16 TeV centre-of-mass energy and a luminosity exceeding 10 33 cm -2 s -1 per interaction point. It can be installed in the tunnel of the Large Electron-Positron Storage Ring (LEP) above the LEP elements. It will use superconducting magnets of a novel, compact design, having two horizontally separated channels for the two counter-rotating bunched proton beams, which can collide in a maximum of seven interaction points. Collisions between protons of the LHC and electrons of LEP are also possible with a centre-of-mass energy of up to 1.8 TeV and a luminosity of up to 2 x 10 32 cm -2 s -1 . (orig.)

  8. Large hadron collider in the LEP tunnel. Proceedings. Vol. 1

    International Nuclear Information System (INIS)

    1984-01-01

    A Workshop, jointly organized by ECFA and CERN, took place at Lausanne and at CERN in March 1984 to study various options for a pp (or panti p) collider which might be installed at a later date alongside LEP in the LEP tunnel. Following the exploration of e + e - physics up to the highest energy now foreseeable, this would open up the opportunity to investigate hadron collisions in the new energy range of 10 to 20 TeV in the centre of mass. These proceedings put together the documents prepared in connection with this Workshop. They cover possible options for a Large Hadron Collider (LHC= in the LEP tunnel, the physics case at it stands at present, and studies of experimental possibilities in this energy range with luminosities as now considered. See hints under the relevant topics. (orig.)

  9. Model of Dipole Field Variations in the LEP Bending Magnets

    CERN Document Server

    Bravin, Enrico; Drees, A; Mugnai, G

    1998-01-01

    The determination of the Z mass at LEP requires a knowledge of the relative beam energy in the order of 10 ppm, therefore it is essential to understand the dipole field variations to the same level of accuracy. In LEP the bending magnet field shows a relative increase of the order of 100 ppm over 10 hours, which was found to be caused by leakage currents from railways flowing along the vacuum cham ber and temperature variations. A LEP dipole test bench was set up for systematic investigations. Field variations were monitored with NMR probes while the cooling water temperature of both coil and vacuum chamber was kept under control. The results lead to a parametrisation of the magnetic field variation as a function of the vacuum chamber current and temperature.

  10. Lack of specific hybridization between the lep genes of Salmonella typhimurium and Bacillus licheniformis

    NARCIS (Netherlands)

    van Dijl, J M; Jong, de Anne; Smith, H; Bron, Sierd; Venema, G

    1991-01-01

    This paper describes an attempt to clone the Bacillus licheniformis lep gene, encoding signal peptidase, using the Salmonella typhimurium lep gene as a hybridization probe. Although a hybridizing fragment was obtained, DNA sequence analysis indicated that it did not contain the lep gene. Instead,

  11. A users view of the SPS and LEP control systems

    International Nuclear Information System (INIS)

    Bailey, R.

    1992-01-01

    Every accelerator has a control system; at present the SPS has two, both of which are needed to run the machine. Consequently a user of the SPS/LEP complex has to be concurrently familiar with three control systems. While this situation brings problems it allows, even forces, comparison between the different systems, which in turn enriches the user viewpoint. This paper assesses the SPS and LEP control systems from the point of view of the user, who may be an equipment specialist, operator, accelerator physicist or combinations thereof. (author)

  12. Early prototype of a superconducting RF cavity for LEP

    CERN Multimedia

    CERN PhotoLab

    1979-01-01

    As early as 1979, before LEP became an approved project, studies were located in the ISR Division. Although Cu-cavities were foreseen, certainly for the 1st energy-stage, superconducting cavities were explored as a possible alternative for the 2nd energy-stage. This began with very basic studies of manufacture and properties of Nb-cavities. This one, held by Mr.Girel, was made from bulk Nb-sheet, 2.5 mm thick. It was dimensioned for tests at 500 MHz (LEP accelerating RF was 352.2 MHz). See also 8004204, 8007354, 8209255, 8210054, 8312339.

  13. Program LEPS to addition of gamma spectra from germanium detectors

    International Nuclear Information System (INIS)

    Romero, L.

    1986-01-01

    The LEP program, written in FORTRAN IV, performs the addition of two spectra, collected with different detectors, from the same sample. This application, adds the two gamma spectra obtained from two opposite LEPS Germanium Detectors (Low Energy Photon Spectrometer), correcting the differences (channel/energy) between both two spectra, and fitting them before adding. The total-spectrum is recorded at the computer memory as a single spectrum. The necessary equipment, to run this program is: - Two opposite germanium detectors, with their associate electronics. - Multichannel analyzer (2048 memory channel minimum) - Computer on-line interfacing to multichannel analyzer. (Author) 4 refs

  14. Report of the 1997 LEP2 working group on 'searches'

    International Nuclear Information System (INIS)

    Allanach, B.C.; Blair, G.A.; Diaz, M.A.

    1997-08-01

    A number of research program reports are presented from the LEP2 positron-electron collider in the area of searches for Higgs bosons, supersymmetry and supergravity. Working groups' reports cover prospective sensitivity of Higgs boson searches, radiative corrections to chargino production, charge and colour breaking minima in minimal Supersymmetric Standard Model, R-party violation effects upon unification predictions, searches for new pair-produced particles, single sneutrino production and searches related to effects similar to HERA experiments. The final section of the report summarizes the LEP 2 searches, concentrating on gians from running at 200 GeV and alternative paradigms for supersymmetric phenomenology. (UK)

  15. Measurement of e-γ interactions at LEP

    International Nuclear Information System (INIS)

    Palomares, C.

    2001-01-01

    This report shows the studies of different eγ interaction processes at LEP. The cross-section of the quasi-real Compton scattering has been measured at centre-of-mass energies between 20 GeV and 185 GeV, using the L3 detector at LEP. The production of single neutral intermediate vector bosons in Compton scattering is analyzed by the DELPHI and OPAL experiments. The production of single excited electrons in a eγ interaction has bee consider as well. (author)

  16. Synchrotron radiation interferences between small dipoles at LEP

    International Nuclear Information System (INIS)

    Bovet, C.; Burns, A.; Meot, F.; Placidi, M.; Rossa, E.; Vries, J. de

    1997-06-01

    Synchrotron Radiation interferences between small dipoles in the very low (visible) frequency range have been studied at the LEP diagnostic mini-wiggler. Their understanding allowed a substantial brightness gain by adequate layout modifications. The phenomenon is described analytically in terms of time coherence effects. This serves as a basis for further detailed numerical simulations of the experiment by means of stepwise ray-tracing, and allows precise interpretation of the spectral, polarization and intensity measurements collected at LEP. It also provides guidelines for SR diagnostic at injection energy in LHC

  17. Potentials of heat recovery from 850C LEP cooling water

    International Nuclear Information System (INIS)

    Koelling, M.

    1982-06-01

    Most of the cooling water from LEP has a too low temperature (30 to 40 0 C) to be considered for economical recovery of energy. However, it is hoped that the heat from the klystrons be removed at a temperature of 85 0 C and that this part of the LEP cooling water might be used for saving primary energy. In this study different possibilities have been investigated to make use of the waste heat for heating purposes during winter time, for saving energy in the refrigeration process in summer and for power generation. Cost estimates for these installations are also given and show their economic drawbacks. (orig.)

  18. PROFICIENT CLASSROOM MANAGEMENT THROUGH FOCUSED MATHEMATIC TEACHING

    Directory of Open Access Journals (Sweden)

    Marcus Samuelsson

    2017-12-01

    Full Text Available A not entirely unusual position among teachers is that they believe that they must first establish a peaceful classroom before they can begin to teach the subject. This research, shows how a proficient mathematics teacher teaches his subject and thereby creates a quiet and focused classroom and exerts effective leadership, just by teaching mathematics. The researchers observed a male mathematics teacher for almost half a year, i.e. one semester. The results of research present several patterns that the researchers saw during the observations of his teaching. The teacher showed an interest in each student’s mathematical thinking and expressed explicitly how students were expected to learn mathematics. He also directed students’ attention to mathematics and established a culture where all solutions were important in the teaching process. In the teaching process, he used multiple representations to motivate students and a lot of supportive expressions that made them feel that they were able to learn mathematics. He worked patiently to establish structures, and there was almost no disruptive behaviour. Students simply did not have time to interfere because they were so engaged in learning mathematics.

  19. Knowledge Management and Organizational Proficiency with NPP

    International Nuclear Information System (INIS)

    Marler, M.

    2016-01-01

    Full text: The pace of new NPP construction, startup, and operation is straining the supply of proficient operators, technicians, and engineers. This technical brief explains an approach implemented by a US nuclear utility to capture and transfer knowledge possessed by proficient workers to new workers using the VISION learning content management system. This approach could also be used to accelerate worker proficiency in new NPP organizations. (author

  20. Ensenanzas en un gimnasio: an investigation of modeling and verbal rehearsal on the motor performance of Hispanic limited English proficient children.

    Science.gov (United States)

    Meaney, K S; Edwards, R

    1996-03-01

    This study investigated the effects of modeling and verbal rehearsal on the motor performance of English-speaking and limited English proficient (LEP) children. Children (N = 64) in 4th-grade classes were randomly assigned to conditions in a 2 x 2 x 2 x 2 (Gender x Primary Language x Model Type x Rehearsal) factorial design. Boys and girls whose primary language was English or Spanish were assigned to either a verbal model or no-model condition as well as to a verbal rehearsal or no-rehearsal condition of the motor skills required to be performed. Analysis of variance revealed a significant Model Type x Primary Language interaction as well as a significant Rehearsal x Primary Language interaction. Follow-up analyses revealed that English-speaking children provided with a verbal rehearsal strategy recalled significantly more skills than English-speaking children in the no-rehearsal condition; for LEP children, there were no differences due to rehearsal. Moreover, LEP children presented with a verbal model recalled significantly more skills than LEP children in the no-model condition; for English-speaking children, there were no differences attributed to model type. These results indicate that effective modeling conditions that are provided with verbal cues in English are related to children's primary language.

  1. Maintenance proficiency evaluation test bank

    International Nuclear Information System (INIS)

    Maier, Loran

    2003-01-01

    The Maintenance Proficiency Evaluation Test Bank (MPETB) is an Electric Power Research Institute- (EPRJ-) operated, utility-sponsored means of developing, maintaining, and disseminating secure, high-quality written and performance maintenance proficiency tests. EPRTs charter is to ensure that all tests and test items that go into the Test Bank have been validated, screened for reliability, and evaluated to high standards of psychometric excellence. Proficiency tests of maintenance personnel.(mechanics, electricians, and instrumentation and control [I and C] technicians) are most often used to determine if an experienced employee is capable of performing maintenance tasks without further training. Such tests provide objective evidence for decisions to exempt an employee from what, for the employee, is unnecessary training. This leads to considerable savings in training costs and increased productivity because supervisors can assign personnel to tasks at which their competence is proven. The ultimate objective of proficiency evaluation is to ensure that qualified maintenance personnel are available to meet the maintenance requirements of the plant Numerous task-specific MPE tests (both written and performance) have been developed and validated using the EPRI MPE methodology by the utilities participating in the MPETB project A task-specific MPE consists of a multiple-choice written examination and a multi-step performance evaluation that can be used to assess an individual's present knowledge and skill level for a given maintenance task. The MPETB contains MPEs and test items for the mechanical, electrical, and I and C classifications that are readily available to participating utilities. Presently, utilities are placing emphasis on developing MPEs to evaluate outage-related maintenance tasks that demonstrate the competency and qualifications of plant and contractor personnel before the start of outage work. Utilities are also using the MPE methodology and process to

  2. Proficiency training on a virtual reality robotic surgical skills curriculum.

    Science.gov (United States)

    Bric, Justin; Connolly, Michael; Kastenmeier, Andrew; Goldblatt, Matthew; Gould, Jon C

    2014-12-01

    The clinical application of robotic surgery is increasing. The skills necessary to perform robotic surgery are unique from those required in open and laparoscopic surgery. A validated laparoscopic surgical skills curriculum (Fundamentals of Laparoscopic Surgery or FLS™) has transformed the way surgeons acquire laparoscopic skills. There is a need for a similar skills training and assessment tool for robotic surgery. Our research group previously developed and validated a robotic training curriculum in a virtual reality (VR) simulator. We hypothesized that novice robotic surgeons could achieve proficiency levels defined by more experienced robotic surgeons on the VR robotic curriculum, and that this would result in improved performance on the actual daVinci Surgical System™. 25 medical students with no prior robotic surgery experience were recruited. Prior to VR training, subjects performed 2 FLS tasks 3 times each (Peg Transfer, Intracorporeal Knot Tying) using the daVinci Surgical System™ docked to a video trainer box. Task performance for the FLS tasks was scored objectively. Subjects then practiced on the VR simulator (daVinci Skills Simulator) until proficiency levels on all 5 tasks were achieved before completing a post-training assessment of the 2 FLS tasks on the daVinci Surgical System™ in the video trainer box. All subjects to complete the study (1 dropped out) reached proficiency levels on all VR tasks in an average of 71 (± 21.7) attempts, accumulating 164.3 (± 55.7) minutes of console training time. There was a significant improvement in performance on the robotic FLS tasks following completion of the VR training curriculum. Novice robotic surgeons are able to attain proficiency levels on a VR simulator. This leads to improved performance in the daVinci surgical platform on simulated tasks. Training to proficiency on a VR robotic surgery simulator is an efficient and viable method for acquiring robotic surgical skills.

  3. Fermion pair production at LEP2 and interpretations

    International Nuclear Information System (INIS)

    Abbiendi, G.

    2001-01-01

    Preliminary results on e + e - → f f-bar, f = e, μ, τ, q, including all LEP2 data are discussed. Good agreement is found with the Standard Model up to the highest energies. Limits on possible new physics are extracted

  4. QCD measurements in photon-photon collisions at LEP

    OpenAIRE

    Csilling, Akos

    2001-01-01

    An overview of the latest results of the LEP collaborations on QCD measurements in photon-photon collisions is presented, including measurements of the total hadronic cross-section, the production of heavy quarks and dijets and the structure functions of real and virtual photons.

  5. Exclusive Channels in Photon-Photon Collisions at LEP

    OpenAIRE

    Braccini, Saverio

    2002-01-01

    The study of exclusive channels in photon-photon collisions at e+e- colliders allows to investigate the structure and the properties of hadrons in a very clean experimental environment. A concise review of the most recent results obtained at LEP is presented.

  6. Software engineering experience from the LEP experiment OPAL

    International Nuclear Information System (INIS)

    Schaile, O.

    1990-01-01

    This contribution describes some of the activities within the OPAL collaboration at LEP to apply Software Engineering Techniques for program development and data documentation. It concentrates on two aspects: Structured Analysis Techniques and a data documentation system developed within OPAL. As far as evaluations are given they are the authors view and opinion

  7. Precision tests of the standard model at LEP

    International Nuclear Information System (INIS)

    Mele, Barbara; Universita La Sapienza, Rome

    1994-01-01

    Recent LEP results on electroweak precision measurements are reviewed. Line-shape and asymmetries analysis on the Z 0 peak is described. Then, the consistency of the Standard Model predictions with experimental data and consequent limits on the top mass are discussed. Finally, the possibility of extracting information and constrains on new theoretical models from present data is examined. (author). 20 refs., 5 tabs

  8. Differences between quark and gluon jets as seen at LEP

    International Nuclear Information System (INIS)

    Tasevsky, M.

    2001-01-01

    The differences between quark and gluon jets are studied using LEP results on jet widths, scale dependent multiplicities, ratios of multiplicities, slopes and curvatures and fragmentation functions. It is emphasized that the observed differences stem primarily from the different quark and gluon colour factors

  9. Prompt photon production in hadronic events at LEP

    CERN Document Server

    Boutigny, D

    1992-01-01

    We review some recent results on photon emission off quarks obtained by the four LEP experiments. These experimental results are compared to different Monte-Carlo predictions and to an exact matrix element calculation at the order (ems). The estimation of the background coming from neutral hadron decays is also discussed.

  10. Differences between Quark and Gluon jets as seen at LEP

    CERN Document Server

    Tasevsky, Marek

    2001-01-01

    The differences between quark and gluon jets are studied using LEP results on jet widths, scale dependent multiplicities, ratios of multiplicities, slopes and curvatures and fragmentation functions. It is emphasized that the observed differences stem primarily from the different quark and gluon colour factors.

  11. Modelling Bose-Einstein correlations at LEP-2

    International Nuclear Information System (INIS)

    Loennblad, L.

    1998-01-01

    Some pros and cons of different strategies for modelling Bose-Einstein correlations in event generators for fully hadronic WW events at LEP-2 are discussed. A few new algorithms based on shifting final-state momenta of identical bosons in WW events generated by PYTHIA are also presented and the resulting predictions for the effects on the W mass measurement are discussed. (author)

  12. LEP Higgs boson searches beyond the standard model

    Indian Academy of Sciences (India)

    These include the searches for charged Higgs bosons, models with two Higgs field doublets, searches for 'fermiophobic' Higgs decay, invisible Higgs boson decays, decay-mode independent searches, and limits on Yukawa and anomalous Higgs couplings. I review the searches done by the four LEP experiments and ...

  13. Beam instrumentation in the LEP Pre-injector

    International Nuclear Information System (INIS)

    Battisti, S.; Bottollier, J.F.; Frammery, B.; Szeless, B.; Van Rooy, M.

    1987-01-01

    The main purpose of this paper is to review the beam instrumentation of the LEP pre-injector (LPI) including its design philosophy and software. The usefulness of these equipments for the LPI start-up is considered from an operational point of view and encountered problems are mentioned

  14. The OPAL Detector (an~Omni~Purpose~Apparatus~for~Lep)

    CERN Multimedia

    Schaile, D A; Watson, N; Craciun, M; Hanson, G; Mcmahon, T J; Stokes, W; Wilson, G W; Carter, J; Plane, D; Scharff-hansen, P; Sahr, O M; Rembser, C; Saeki, T; Nisius, R; Campana, S; Kormos, L L; Marchant, T E; Takeda, H; Kupper, M; Hill, J C; Hajdu, C; Hauschild, M; Charlton, D; Kellogg, R; Kluth, S; Asai, S; Nellen, B; Bright-thomas, P; Polok, J; Guenther, P O; Keeler, R; Schwick, C; Stephens, K; Zankel, K; Watkins, P; Chang, C Y; Roney, M; Fischer, H; Dubbert, J

    2002-01-01

    The OPAL Detector (an Omni Purpose Apparatus for Lep) \\\\ \\\\OPAL, a general purpose detector, was designed to study a wide range of unexplored physics at LEP. \\\\ \\\\At LEP1, one of the central issues is the precise determination of the mass, width and couplings to quarks and leptons of the Z$^{0}$ boson. At LEP2 the mass and couplings of the W$^\\pm$ bosons are determined. Accurate measurements of these quantities might reveal the mechanisms by which symmetries are broken. Many topics relating to heavy flavours are studied, including the properties of tau leptons, and the spectroscopy, lifetimes and mixing of hadrons containing b-quarks. \\\\ \\\\There are very active QCD and Two-Photon groups. Among the topics being studied are the determination of the strong coupling constant, $ \\alpha _{S} $, tests of the group structure of QCD, differences between quark- and gluon-induced jets, many aspects of the fragmentation process measurements of many different final states in photon-photon collision, and measurement of str...

  15. Lifetimes and masses of b-hadrons at LEP

    International Nuclear Information System (INIS)

    Lesiak, T.

    1994-07-01

    Latest LEP results concerning hadrons containing b-quarks are reviewed. The average lifetime of the b-hadrons together with the lifetimes of the B u + , B d 0 , B s and Λ b and first mass measurements of the B s and Λ b are presented. (author). 34 refs, 7 figs, 4 tabs

  16. DELPHI $\\tau$ lifetime results using all LEP-1 data

    CERN Document Server

    McNulty, R

    2001-01-01

    Using events collected by the DELPHI detector at LEP in the years 1991-1995, the tau lepton lifetime has been measured to be (290.7+-1.5+-1.0) fs. Three different methods have been exploited utilising decays of the tau into final states containing one or three charged tracks. (6 refs).

  17. The DELPHI Trigger System at LEP2 Energies

    CERN Document Server

    Augustinus, A; Charpentier, P; De Wulf, J P; Fontanelli, F; Formenti, F; Gaspar, C; Gavillet, P; Goorens, R; Laugier, J P; Musico, P; Paganoni, M; Sannino, M; Valenti, G

    2003-01-01

    In this paper we describe the modifications carried out on the DELPHI trigger complex since the beginning of the high energy runs of LEP. The descriptions of the trigger configurations and performances for the 2000 data taking period are also presented.

  18. Focus group evaluation of "Secret Feelings": a depression fotonovela for Latinos with limited English proficiency.

    Science.gov (United States)

    Cabassa, Leopoldo J; Contreras, Sandra; Aragón, Rebeca; Molina, Gregory B; Baron, Melvin

    2011-11-01

    In this study, the authors examined reactions of Latino adults with limited English proficiency (LEP) to a culturally and linguistically adapted depression fotonovela, titled "Secret Feelings." Fotonovelas are popular health education tools that use posed photographs, text bubbles with simple text, and dramatic narratives to engage audiences and raise their awareness and knowledge about specific health issues. Four focus groups (N = 32) were conducted at an adult school program (e.g., GED classes). Content analysis was used to generate themes from transcripts and memos. "Secret Feelings" was viewed as an entertaining, engaging, and educational tool that helped combat stigma toward depression and its treatments in the Latino community. Despite learning about depression, participants reported they wanted more information about the causes of depression, the process of recovery, and felt that the story did not shift their apprehensions toward antidepressants. The findings suggest that "Secret Feelings" is a promising depression literacy tool for Latinos with LEP that can raise awareness and knowledge about depression and its treatments, reduce stigma toward depression and antidepressant medications, and model appropriate help-seeking behaviors.

  19. [Laboratory accreditation and proficiency testing].

    Science.gov (United States)

    Kuwa, Katsuhiko

    2003-05-01

    ISO/TC 212 covering clinical laboratory testing and in vitro diagnostic test systems will issue the international standard for medical laboratory quality and competence requirements, ISO 15189. This standard is based on the ISO/IEC 17025, general requirements for competence of testing and calibration laboratories and ISO 9001, quality management systems-requirements. Clinical laboratory services are essential to patient care and therefore should be available to meet the needs of all patients and clinical personnel responsible for human health care. If a laboratory seeks accreditation, it should select an accreditation body that operates according to this international standard and in a manner which takes into account the particular requirements of clinical laboratories. Proficiency testing should be available to evaluate the calibration laboratories and reference measurement laboratories in clinical medicine. Reference measurement procedures should be of precise and the analytical principle of measurement applied should ensure reliability. We should be prepared to establish a quality management system and proficiency testing in clinical laboratories.

  20. Motor Proficiency in Young Children

    Directory of Open Access Journals (Sweden)

    Fotini Venetsanou

    2016-01-01

    Full Text Available This study aimed to examine motor proficiency in young children, focusing on potential gender differences. For that purpose, the Bruininks-Oseretsky Test of Motor Proficiency–Long Form (BOTMP-LF was administered to 540 children (272 boys, 4½ to 6 years old. First, the 2 (sex × 4 (age groups ANOVA computed on children’s total BOTMP-LF scores showed that age had a statistically significant effect, whereas gender did not. Second, the one-way MANCOVA applied on subtest scores, with age as covariate, revealed statistical significant gender differences; however, η2 values were found to be small or moderate. Finally, the MANCOVA applied on items where significant gender differences have been reported showed a significant effect of gender. Nonetheless, η2 values exceeded the limit of practical significance only on two items (“standing on preferred leg on floor”, “throwing a ball at a target with preferred hand” that are associated with gender-stereotyped activities. It can be concluded that (a besides statistical significance, effect sizes should be examined for the results of a study to be adequately interpreted; (b young boys’ and girls’ motor proficiency is similar rather than different. Gender differences in specific skills should be used for movement programs to be individualized.

  1. Linguistic Proficiency and Strategies on Reading Performance in English

    Directory of Open Access Journals (Sweden)

    Seyed Hassan Talebi

    2015-01-01

    Full Text Available General English (L2 proficiency and reading strategies are believed to be highly effective in successful reading performance. However, available studies rarely investigated the combined effects of these two variables on successful reading. To fill this gap, 78 university students were divided into four groups of different degrees of these two variables in L2 and given a reading test in English and an interview for assessing how much of the problems in L2 reading among the four groups were rooted in linguistic competence and/or strategic competence. Findings evinced that the high general proficiency level coupled with high awareness and use of reading strategies would result in best performance and that the pattern of answers to different components of reading question is different in different groups. It is concluded that both of the variables should be emphasized simultaneously for the best performance in reading comprehension.

  2. Proficiency test for aflatoxin in pig feed

    NARCIS (Netherlands)

    Elbers, I.J.W.; Nijs, de W.C.M.

    2015-01-01

    Proficiency testing is conducted to provide laboratories with a powerful tool to evaluate and demonstrate the reliability of the data that are produced. Next to validation and accreditation, proficiency testing is an important requirement of the EU Additional Measures Directive 93/99/EEC [1] and is

  3. Proficiency study for quinolones in egg

    NARCIS (Netherlands)

    Berendsen, B.J.A.; Stolker, A.A.M.

    2008-01-01

    The aim of this proficiency study was to give laboratories the possibility to evaluate or demonstrate their competence for the analysis of quinolones in egg. Furthermore the specificity of the applied methods is evaluated by including possibly interfering compounds in the proficiency study. This

  4. Measuring receptive collocational competence across proficiency ...

    African Journals Online (AJOL)

    The present study investigates (i) English as Foreign Language (EFL) learners' receptive collocational knowledge growth in relation to their linguistic proficiency level; (ii) how much receptive collocational knowledge is acquired as linguistic proficiency develops; and (iii) the extent to which receptive knowledge of ...

  5. Proficiency test for allergens in food 2014

    NARCIS (Netherlands)

    Bremer, M.G.E.G.; Alamenou, P.; Elbers, I.J.W.

    2015-01-01

    In the autumn of 2014 a proficiency test for allergens in baby cereal was organized by RIKILT, Wageningen UR. This PT-test enabled laboratories to evaluate their competence for the analysis of allergens in baby cereal. Both quantitative and qualitative methods were accepted. The proficiency test was

  6. Language proficiency: Current strategies, future remedies ...

    African Journals Online (AJOL)

    Language proficiency among young South Africans is low. This is true not only of mother tongue speakers of English and Afrikaans, but also, and especially, of non-mother tongue speakers of English, among whom language proficiency levels raise serious concern. Some examples are given to illustrate the importance of ...

  7. A Contextualized Approach to Describing Oral Proficiency.

    Science.gov (United States)

    Chalhoub-Deville, Micheline

    1995-01-01

    Studies learners' second-language (L2) oral proficiency, incorporating an interview, a narration, and a read-aloud. Results show that the nature of the L2 oral construct is not constant. The article concludes that proficiency researchers should use dimensions empirically derived according to the specific elicitation task and audience. (53…

  8. Language Learning Strategy Use across Proficiency Levels

    Science.gov (United States)

    Zarei, Abbas, Ali; Baharestani, Nooshin

    2014-01-01

    To investigate the use of language learning strategies (LLS) by Iranian EFL learners across proficiency levels, a total of 180 Iranian adult female EFL learners were selected and divided into three different proficiency level groups. To collect data, Oxford's (1990) Strategy Inventory for Language Learning (SILL) was used. One-way ANOVA procedures…

  9. Miscue Analysis of Oral Reading among Less Proficient Readers in Primary Schools in Brunei Darussalam

    Science.gov (United States)

    Hamid, Juliana Bte Haji Abdul; Abosi, Okechukwu

    2011-01-01

    Reading disability is the most common disability. At least one in five children has significant challenges learning to read. This study focused on the oral reading performance of 30 Year-Three students. The students were identified as less proficient readers from two randomly selected primary schools in Brunei Darussalam. The oral reading…

  10. "Kulturexkurse": A Model for Teaching Deeper German Culture in a Proficiency-Based Curriculum

    Science.gov (United States)

    Peters, George F.

    2003-01-01

    The cognitive skills of beginning German students in high school and college outstrip their linguistic ability in the target language. In a proficiency-based curriculum, students communicate about familiar matters and everyday culture although they are intellectually prepared to consider more complex cultural issues. As a result, deeper culture is…

  11. Using Self-Regulated Learning Strategies in Enhancing Language Proficiency with a Focus on Reading Comprehension

    Science.gov (United States)

    Abbasian, Gholam-Reza; Hartoonian, Anahid

    2014-01-01

    Self-regulated learning strategies have recently received a remarkable attention by researchers. The aim of this study was to explore the relationship between self-regulated learning strategies and students' language proficiency as well as their reading comprehension. To do so, 115 Iranian EFL university students were selected. First, a TOEFL test…

  12. CERN: LEP to higher energy/LHC magnet string test

    International Nuclear Information System (INIS)

    Anon.

    1995-01-01

    At 19.45 on 31 October, CERN's LEP electron-positron collider, equipped with superconducting radiofrequency accelerating cavities, registered its first events at a record collision energy of 130 GeV. During November, LEP went on to operate in the 130-140 GeV collision energy range. Fabrication and installation of the superconducting radiofrequency accelerating cavities needed to boost the energy of LEP's electron and positron beams have speeded up as confidence and expertise have increased. 16 additional cavities were installed in a brief technical stop during October. For the substantially upgraded machine to supply 65 GeV beams immediately and at luminosities comparable to those routinely attained before shows that the complicated technology needed for the superconducting cavities and mastering the machine itself are well under control - yet another remarkable achievement in CERN's tradition of remarkable achievements. Before the end-1995 run, LEP had been operating around the Z resonance at 91 GeV ever since its commissioning in 1989. LEP precision data on the Z, the electrically neutral carrier of the weak nuclear force, is now complete, and attention shifts toward the next major objective, accumulating data on the W, the Z's electrically charged counterpart. Unlike the Z, produced singly in electron-positron annihilations, the electrically charged Ws have to be produced in pairs. During the coming long shutdown, more superconducting modules will be installed to prepare for recommencement of operations in June, this time at collision energies of 161 GeV, allowing a first step across a longawaited 2W threshold. Later in the year more cavities will be ready to boost collision energies to 176 GeV. However in the meantime the LEP experiments, no longer blinded by the Z resonance, will be keeping a sharp eye open for new physics, and in particular for signs of as yet unseen supersymmetric particles. Theorists have long been convinced that our

  13. Measuring receptive collocational competence across proficiency levels

    Directory of Open Access Journals (Sweden)

    Déogratias Nizonkiza

    2015-12-01

    Full Text Available The present study investigates, (i English as Foreign Language (EFL learners’ receptive collocational knowledge growth in relation to their linguistic proficiency level; (ii how much receptive collocational knowledge is acquired as proficiency develops; and (iii the extent to which receptive knowledge of collocations of EFL learners varies across word frequency bands. A proficiency measure and a collocation test were administered to English majors at the University of Burundi. Results of the study suggest that receptive collocational competence develops alongside EFL learners’ linguistic proficiency; which lends empirical support to Gyllstad (2007, 2009 and Author (2011 among others, who reported similar findings. Furthermore, EFL learners’ collocations growth seems to be quantifiable wherein both linguistic proficiency level and word frequency occupy a crucial role. While more gains in terms of collocations that EFL learners could potentially add as a result of change in proficiency are found at lower levels of proficiency; collocations of words from more frequent word bands seem to be mastered first, and more gains are found at more frequent word bands. These results confirm earlier findings on the non-linearity nature of vocabulary growth (cf. Meara 1996 and the fundamental role played by frequency in word knowledge for vocabulary in general (Nation 1983, 1990, Nation and Beglar 2007, which are extended here to collocations knowledge.

  14. ECFA workshop on LEP 200. Vol. 1 and 2

    International Nuclear Information System (INIS)

    Boehm, A.; Hoogland, W.

    1987-01-01

    On the initiative of the European Committee for Future Accelerators, a workshop was organized to study experimental and theoretical aspects of the physics feasible at LEP with the beam energy increased to its design value of 100 GeV per beam. These two volumes provide the written versions of the reports presented by nine working groups to the workshop, as well as the presentations on the machine upgrade itself and the potential of hadron colliders and of HERA for LEP 200 physics. Each working group studied a specific topic, evaluating in some detail the requirements both for the detectors and for the machine of W mass measurements, W decay properties, W production dynamics, electroweak radiative corrections, two-photon physics, new heavy quarks and leptons, Higgs particles, supersymmetric particles, and composite models. The proceedings also include some of the more detailed work done in the framework of the working groups. (orig.)

  15. Electro-Magnetic Bunch Length Measurement in LEP

    CERN Document Server

    Vos, L

    1998-01-01

    Bunch lengths between 3 and 12 mm have been measured routinely in LEP in 1997 with a small (7 mm diameter) button electrode. The measurement method is based on the spectral analysis of the electrode signal and relies on the fact that the transfer function of the complete set-up, including the signal cable, can be computed rather exactly thus eliminating the need for external calibration. The information of beam intensity is recovered as a by-product. It provides an interesting internal validation of the measurement by comparison with the normal intensity measurement. The system has been used to detect subtle but real bunch length changes with bunch intensity which can be attributed to the inductive impedance in LEP. A value for the imaginary (inductive) longitudinal impedance is derived from the observations. An indication for the resistive part of the impedance is given as well.

  16. Search for Charged Higgs bosons: Combined Results Using LEP data

    CERN Document Server

    Abbiendi, G.; CERN. Geneva; Akesson, P.F.; Alexander, G.; Anagnostou, G.; Anderson, K.J.; Asai, S.; Axen, D.; Bailey, I.; Barberio, E.; Barillari, T.; Barlow, R.J.; Batley, R.J.; Bechtle, P.; Behnke, T.; Bell, K.W.; Bell, P.J.; Bella, G.; Bellerive, A.; Benelli, G.; Bethke, S.; Biebel, O.; Boeriu, O.; Bock, P.; Boutemeur, M.; Braibant, S.; Brown, Robert M.; Burckhart, H.J.; Campana, S.; Capiluppi, P.; Carnegie, R.K.; Carter, A.A.; Carter, J.R.; Chang, C.Y.; Charlton, D.G.; Ciocca, C.; Csilling, A.; Cuffiani, M.; Dado, S.; Dallavalle, M.; De Roeck, A.; De Wolf, E.A.; Desch, K.; Dienes, B.; Dubbert, J.; Duchovni, E.; Duckeck, G.; Duerdoth, I.P.; Etzion, E.; Fabbri, F.; Ferrari, P.; Fiedler, F.; Fleck, I.; Ford, M.; Frey, A.; Gagnon, P.; Gary, John William; Geich-Gimbel, C.; Giacomelli, G.; Giacomelli, P.; Giunta, Marina; Goldberg, J.; Gross, E.; Grunhaus, J.; Gruwe, M.; Gupta, A.; Hajdu, C.; Hamann, M.; Hanson, G.G.; Harel, A.; Hauschild, M.; Hawkes, C.M.; Hawkings, R.; Herten, G.; Heuer, R.D.; Hill, J.C.; Horvath, D.; Igo-Kemenes, P.; Ishii, K.; Jeremie, H.; Jovanovic, P.; Junk, T.R.; Kanzaki, J.; Karlen, D.; Kawagoe, K.; Kawamoto, T.; Keeler, R.K.; Kellogg, R.G.; Kennedy, B.W.; Kluth, S.; Kobayashi, T.; Kobel, M.; Komamiya, S.; Kramer, T.; Krasznahorkay, A., Jr.; Krieger, P.; von Krogh, J.; Kuhl, T.; Kupper, M.; Lafferty, G.D.; Landsman, H.; Lanske, D.; Lellouch, D.; Letts, J.; Levinson, L.; Lillich, J.; Lloyd, S.L.; Loebinger, F.K.; Lu, J.; Ludwig, A.; Ludwig, J.; Mader, W.; Marcellini, S.; Martin, A.J.; Mashimo, T.; Mattig, P.; McKenna, J.; McPherson, R.A.; Meijers, F.; Menges, W.; Merritt, F.S.; Mes, H.; Meyer, N.; Michelini, A.; Mihara, S.; Mikenberg, G.; Miller, D.J.; Mohr, W.; Mori, T.; Mutter, A.; Nagai, K.; Nakamura, I.; Nanjo, H.; Neal, H.A.; O'Neale, S.W.; Oh, A.; Okpara, A.; Oreglia, M.J.; Orito, S.; Pahl, C.; Pasztor, G.; Pater, J.R.; Pilcher, J.E.; Pinfold, J.; Plane, D.E.; Pooth, O.; Przybycien, M.; Quadt, A.; Rabbertz, K.; Rembser, C.; Renkel, P.; Roney, J.M.; Rossi, A.M.; Rozen, Y.; Runge, K.; Sachs, K.; Saeki, T.; Sarkisyan, E.K.G.; Schaile, A.D.; Schaile, O.; Scharff-Hansen, P.; Schieck, J.; Schorner-Sadenius, T.; Schroder, M.; Schumacher, M.; Seuster, R.; Shears, T.G.; Shen, B.C.; Sherwood, P.; Skuja, A.; Smith, A.M.; Sobie, R.; Soldner-Rembold, S.; Spano, F.; Stahl, A.; Strom, D.; Strohmer, R.; Tarem, S.; Tasevsky, M.; Teuscher, R.; Thomson, M.A.; Torrence, E.; Toya, D.; Trigger, I.; Trocsanyi, Z.; Tsur, E.; Turner-Watson, M.F.; Ueda, I.; Ujvari, B.; Vollmer, C.F.; Vannerem, P.; Vertesi, R.; Verzocchi, M.; Voss, H.; Vossebeld, J.; Ward, C.P.; Ward, D.R.; Watkins, P.M.; Watson, A.T.; Watson, N.K.; Wells, P.S.; Wengler, T.; Wermes, N.; Wilson, G.W.; Wilson, J.A.; Wolf, G.; Wyatt, T.R.; Yamashita, S.; Zer-Zion, D.; Zivkovic, Lidija; Abdallah, J.; Abreu, P.; Adam, W.; Adzic, P.; Albrecht, T.; Alderweireld, T.; Alemany-Fernandez, R.; Allmendinger, T.; Allport, P.P.; Amaldi, U.; Amapane, N.; Amato, S.; Anashkin, E.; Andreazza, A.; Andringa, S.; Anjos, N.; Antilogus, P.; Apel, W.D.; Arnoud, Y.; Ask, S.; Asman, B.; Augustin, J.E.; Augustinus, A.; Baillon, P.; Ballestrero, A.; Bambade, P.; Barbier, R.; Bardin, D.; Barker, G.; Baroncelli, A.; Battaglia, M.; Baubillier, M.; Becks, K.H.; Begalli, M.; Behrmann, A.; Ben-Haim, E.; Benekos, N.; Benvenuti, A.; Berat, C.; Berggren, M.; Berntzon, L.; Bertrand, D.; Besancon, M.; Besson, N.; Bloch, D.; Blom, M.; Bluj, M.; Bonesini, M.; Boonekamp, M.; Booth, P.S.L.; Borisov, G.; Botner, O.; Bouquet, B.; Bowcock, T.J.V.; Boyko, I.; Bracko, M.; Brenner, R.; Brodet, E.; Bruckman, P.; Brunet, J.M.; Bugge, L.; Buschmann, P.; Calvi, M.; Camporesi, T.; Canale, V.; Carena, F.; Castro, Nuno Filipe; Cavallo, F.; Chapkin, M.; Charpentier, Ph.; Checchia, P.; Chierici, R.; Chliapnikov, P.; Chudoba, J.; Chung, S.U.; Cieslik, K.; Collins, P.; Contri, R.; Cosme, G.; Cossutti, F.; Costa, M.J.; Crennell, D.; Cuevas, J.; D'Hondt, J.; Dalmau, J.; da Silva, T.; Da Silva, W.; Della Ricca, G.; De Angelis, A.; De Boer, W.; De Clercq, C.; 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Vodopianov, I.; Vogel, H.; Vogt, H.; Vorobev, I.; Vorobyov, A.A.; Wadhwa, M.; Wang, Q.; Wang, X.L.; Wang, Z.M.; Weber, M.; Wienemann, P.; Wilkens, H.; Wynhoff, S.; Xia, L.; Xu, Z.Z.; Yamamoto, J.; Yang, B.Z.; Yang, C.G.; Yang, H.J.; Yang, M.; Yeh, S.C.; Zalite, A.; Zalite, Yu.; Zhang, Z.P.; Zhao, J.; Zhu, G.Y.; Zhu, R.Y.; Zhuang, H.L.; Zichichi, A.; Zimmermann, B.; Zoller, M.; Heister, A.; Schael, S.; Barate, R.; Bruneliere, R.; De Bonis, I.; Decamp, D.; Goy, C.; Jezequel, S.; Lees, J.P.; Martin, F.; Merle, E.; Minard, M.N.; Pietrzyk, B.; Trocme, B.; Boix, G.; Bravo, S.; Casado, M.P.; Chmeissani, M.; Crespo, J.M.; Fernandez, E.; Fernandez-Bosman, M.; Garrido, Ll.; Grauges, E.; Lopez, J.; Martinez, M.; Merino, G.; Pacheco, A.; Paneque, D.; Ruiz, H.; Colaleo, A.; Creanza, D.; De Filippis, N.; de Palma, M.; Iaselli, G.; Maggi, G.; Maggi, M.; Nuzzo, S.; Ranieri, A.; Raso, G.; Ruggieri, F.; Selvaggi, G.; Silvestris, L.; Tempesta, P.; Tricomi, A.; Zito, G.; Huang, X.; Lin, J.; Ouyang, Q.; Wang, T.; Xie, Y.; Xu, R.; Xue, S.; Zhang, J.; Zhang, L.; Zhao, W.; Abbaneo, D.; Azzurri, P.; Barklow, T.; Buchmuller, O.; Cattaneo, M.; Cerutti, F.; Clerbaux, B.; Drevermann, H.; Forty, R.W.; Frank, M.; Gianotti, F.; Greening, T.C.; Hansen, J.B.; Harvey, J.; Hutchcroft, D.E.; Janot, P.; Jost, B.; Kado, M.; Mato, P.; Moutoussi, A.; Ranjard, F.; Rolandi, Gigi; Schlatter, D.; Sguazzoni, G.; Tejessy, W.; Teubert, F.; Valassi, A.; Videau, I.; Ward, J.J.; Badaud, F.; Dessagne, S.; Falvard, A.; Fayolle, D.; Gay, P.; Jousset, J.; Michel, B.; Monteil, S.; Pallin, D.; Pascolo, J.M.; Perret, P.; Hansen, J.D.; Hansen, J.R.; Hansen, P.H.; Nilsson, B.S.; Kyriakis, A.; Markou, C.; Simopoulou, E.; Vayaki, A.; Zachariadou, K.; Blondel, A.; Brient, J.C.; Machefert, F.; Rouge, A.; Swynghedauw, M.; Tanaka, R.; Videau, H.; Ciulli, V.; Focardi, E.; Parrini, G.; Antonelli, A.; Antonelli, M.; Bencivenni, G.; Bossi, F.; Capon, G.; Chiarella, V.; Laurelli, P.; Mannocchi, G.; Murtas, G.P.; Passalacqua, L.; Kennedy, J.; Lynch, J.G.; Negus, P.; O'Shea, V.; Thompson, A.S.; Wasserbaech, S.; Cavanaugh, R.; Dhamotharan, S.; Geweniger, C.; Hanke, P.; Hepp, V.; Kluge, E.E.; Leibenguth, G.; Putzer, A.; Stenzel, H.; Tittel, K.; Wunsch, M.; Beuselinck, R.; Cameron, W.; Davies, G.; Dornan, P.J.; Girone, M.; Hill, R.D.; Marinelli, N.; Nowell, J.; Rutherford, S.A.; Sedgbeer, J.K.; Thompson, J.C.; White, R.; Ghete, V.M.; Girtler, P.; Kneringer, E.; Kuhn, D.; Rudolph, G.; Bouhova-Thacker, E.; Bowdery, C.K.; Clarke, D.P.; Ellis, G.; Finch, A.J.; Foster, F.; Hughes, G.; Jones, R.W.L.; Pearson, M.R.; Robertson, N.A.; Smizanska, M.; van der Aa, O.; Delaere, C.; Lemaitre, V.; Blumenschein, U.; Holldorfer, F.; Jakobs, K.; Kayser, F.; Kleinknecht, K.; Muller, A.S.; Quast, G.; Renk, B.; Sander, H.G.; Schmeling, S.; Wachsmuth, H.; Zeitnitz, C.; Ziegler, T.; Bonissent, A.; Coyle, P.; Curtil, C.; Ealet, A.; Fouchez, D.; Payre, P.; Tilquin, A.; Ragusa, F.; David, A.; Dietl, H.; Ganis, G.; Huttmann, K.; Lutjens, G.; Manner, W.; Moser, H.G.; Settles, R.; Wolf, G.; Boucrot, J.; Callot, O.; Davier, M.; Duflot, L.; Grivaz, J.F.; Heusse, P.; Jacholkowska, A.; Serin, L.; Veillet, J.J.; de Vivie de Regie, J.B.; Yuan, C.; Bagliesi, Giuseppe; Boccali, T.; Foa, L.; Giammanco, A.; Giassi, A.; Ligabue, F.; Messineo, A.; Palla, F.; Sanguinetti, G.; Sciaba, A.; Tenchini, R.; Venturi, A.; Verdini, P.G.; Awunor, O.; Blair, G.A.; Cowan, G.; Garcia-Bellido, A.; Green, M.G.; Jones, L.T.; Medcalf, T.; Misiejuk, A.; Strong, J.A.; Teixeira-Dias, P.; Clifft, R.W.; Edgecock, T.R.; Norton, P.R.; Tomalin, I.R.; Bloch-Devaux, Brigitte; Boumediene, D.; Colas, P.; Fabbro, B.; Lancon, E.; Lemaire, M.C.; Locci, E.; Perez, P.; Rander, J.; Tuchming, B.; Vallage, B.; Konstantinidis, N.; Litke, A.M.; Taylor, G.; Booth, C.N.; Cartwright, S.; Combley, F.; Hodgson, P.N.; Lehto, M.; Thompson, L.F.; Boehrer, Armin; Brandt, S.; Grupen, C.; Hess, J.; Ngac, A.; Prange, G.; Sieler, U.; Borean, C.; Giannini, G.; He, H.; Putz, J.; Rothberg, J.; Armstrong, S.R.; Berkelman, Karl; Cranmer, K.; Ferguson, D.P.S.; Gao, Y.; Gonzalez, S.; Hayes, O.J.; Hu, H.; Jin, S.; Kile, J.; McNamara, P.A., III; Nielsen, J.; Pan, Y.B.; von Wimmersperg-Toeller, J.H.; Wiedenmann, W.; Wu, J.; Wu, Sau Lan; Wu, X.; Zobernig, G.; Dissertori, G.; Heinemeyer, S.

    2013-01-01

    The four LEP collaborations, ALEPH, DELPHI, L3 and OPAL, have searched for pair-produced charged Higgs bosons in the framework of Two Higgs Doublet Models (2HDMs). The data of the four experiments are statistically combined. The results are interpreted within the 2HDM for Type I and Type II benchmark scenarios. No statistically significant excess has been observed when compared to the Standard Model background prediction, and the combined LEP data exclude large regions of the model parameter space. Charged Higgs bosons with mass below 80 GeV/c$^2$ (Type II scenario) or 72.5 GeV/c$^2$ (Type I scenario, for pseudo-scalar masses above 12 GeV/c$^2$) are excluded at the 95% confidence level.

  17. Measurement of the W mass at LEP 200

    International Nuclear Information System (INIS)

    Bijnens, J.; Zeppenfeld, D.; Kunszt, Z.

    1987-01-01

    Each of the four LEP experiments can measure in at least three ways the mass of the W boson at LEP 200 with an accuracy of the order of 100 MeV (or better). W mass measurement from the threshold behavior of σ (e + e - →W + W - ), W mass reconstruction using the W decay products, and W mass reconstruction from the end point of the lepton energy spectrum. The integrated luminosity of 500 events/pb used in this study provides a better statistical accuracy (50-60 MeV) but it appears difficult to control the systematical uncertainties at such a level. All the methods proposed in this report require the knowledge of the machine beam energy which gives in any case an absolute limit on the W mass measurement accuracy. Then, the theoretical interest in measuring M W at the 1 o/oo level is discussed. 22 figs; 25 refs

  18. Radiative four-fermion processes at LEP2

    International Nuclear Information System (INIS)

    Montagna, G.; Nicrosini, O.; Osmo, M.; Piccinini, F.; Moretti, M.

    2001-01-01

    The production of four fermions plus a visible photon in electron-positron collisions is analyzed, with particular emphasis on the LEP2 energy range. The study is based on the calculation of exact matrix elements, including the effect of fermion masses. In the light of the present measurements performed at LEP, triple and quartic anomalous gauge couplings are taken into account. Due to the presence of a visible photon in the final state, particular attention is paid to the treatment of higher-order QED corrections. Explicit results for integrated cross sections and differential distributions are shown and commented on. The features of the Monte Carlo program WRAP, used to perform the calculation and available for experimental analysis, are described. (orig.)

  19. Search for the Standard Model Higgs Boson at LEP

    CERN Document Server

    Barate, R.; De Bonis, I.; Decamp, D.; Goy, C.; Jezequel, S.; Lees, J.P.; Martin, F.; Merle, E.; Minard, M.N.; Pietrzyk, B.; Trocme, B.; Boix, G.; Bravo, S.; Casado, M.P.; Chmeissani, M.; Crespo, J.M.; Fernandez, E.; Fernandez-Bosman, M.; Garrido, L.; Grauges, E.; Lopez, J.; Martinez, M.; Merino, G.; Miquel, R.; Mir, L.M.; Pacheco, A.; Paneque, D.; Ruiz, H.; Heister, A.; Schael, S.; Colaleo, A.; Creanza, D.; De Filippis, N.; de Palma, M.; Iaselli, G.; Maggi, G.; Maggi, M.; Nuzzo, S.; Ranieri, A.; Raso, G.; Ruggieri, F.; Selvaggi, G.; Silvestris, L.; Tempesta, P.; Tricomi, A.; Zito, G.; Huang, X.; Lin, J.; Quyang, Q.; Wang, T.; Xie, Y.; Xu, R.; Xue, S.; Zhang, J.; Zhang, L.; Zhao, W.; Abbaneo, D.; Azzurri, P.; Barklow, T.; Buchmuller, O.; Cattaneo, M.; Cerutti, F.; Clerbaux, B.; Drevermann, H.; Forty, R.W.; Frank, M.; Gianotti, F.; Greening, T.C.; Hansen, J.B.; Harvey, J.; Hutchcroft, D.E.; Janot, P.; Jost, B.; Kado, M.; Maley, P.; Mato, P.; Moutoussi, A.; Ranjard, F.; Rolandi, Gigi; Schlatter, D.; Sguazzoni, G.; Tejessy, W.; Teubert, F.; Valassi, A.; Videau, I.; Ward, J.J.; Badaud, F.; Dessagne, S.; Falvard, A.; Fayolle, D.; Gay, P.; Jousset, J.; Michel, B.; Monteil, S.; Pallin, D.; Pascolo, J.M.; Perret, P.; Hansen, J.D.; Hansen, J.R.; Hansen, P.H.; Nilsson, B.S.; Waananen, A.; Kyriakis, A.; Markou, C.; Simopoulou, E.; Vayaki, A.; Zachariadou, K.; Blondel, A.; Brient, J.C.; Machefert, F.; Rouge, A.; Swynghedauw, M.; Tanaka, R.; Videau, H.; Ciulli, V.; Focardi, E.; Parrini, G.; Antonelli, A.; Antonelli, M.; Bencivenni, G.; Bologna, G.; Bossi, F.; Campana, P.; Capon, G.; Chiarella, V.; Laurelli, P.; Mannocchi, G.; Murtas, F.; Murtas, G.P.; Passalacqua, L.; Pepe-Altarelli, M.; Spagnolo, P.; Kennedy, J.; Lynch, J.G.; Negus, P.; O'Shea, V.; Smith, D.; Thompson, A.S.; Wasserbaech, S.; Cavanaugh, R.; Dhamotharan, S.; Geweniger, C.; Hanke, P.; Hepp, V.; Kluge, E.E.; Leibenguth, G.; Putzer, A.; Stenzel, H.; Tittel, K.; Werner, S.; Wunsch, M.; Beuselinck, R.; Binnie, D.M.; 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Hofer, H.; Holzner, G.; Hou, S.R.; Hu, Y.; Jin, B.N.; Jones, Lawrence W.; de Jong, P.; Josa-Mutuberria, I.; Kafer, D.; Kaur, M.; Kienzle-Focacci, M.N.; Kim, J.K.; Kirkby, Jasper; Kittel, W.; Klimentov, A.; Konig, A.C.; Kopal, M.; Koutsenko, V.; Kraber, M.; Kraemer, R.W.; Krenz, W.; Kruger, A.; Kunin, A.; Ladron de Guevara, P.; Laktineh, I.; Landi, G.; Lebeau, M.; Lebedev, A.; Lebrun, P.; Lecomte, P.; Lecoq, P.; Le Coultre, P.; Lee, H.J.; Le Goff, J.M.; Leiste, R.; Levtchenko, P.; Li, C.; Likhoded, S.; Lin, C.H.; Lin, W.T.; Linde, F.L.; Lista, L.; Liu, Z.A.; Lohmann, W.; Longo, E.; Lu, Y.S.; Lubelsmeyer, K.; Luci, C.; Luckey, David; Luminari, L.; Lustermann, W.; Ma, W.G.; Malgeri, L.; Malinin, A.; Mana, C.; Mangeol, D.; Mans, J.; Martin, J.P.; Marzano, F.; Mazumdar, K.; McNeil, R.R.; Mele, S.; Merola, L.; Meschini, M.; Metzger, W.J.; Mihul, A.; Milcent, H.; Mirabelli, G.; Mnich, J.; Mohanty, G.B.; Muanza, G.S.; Muijs, A.J.M.; Musicar, B.; Musy, M.; Nagy, S.; Napolitano, M.; Nessi-Tedaldi, F.; Newman, H.; Niessen, T.; Nisati, A.; Kluge, Hannelies; Ofierzynski, R.; Organtini, G.; Palomares, C.; Pandoulas, D.; Paolucci, P.; Paramatti, R.; Passaleva, G.; Patricelli, S.; Paul, Thomas Cantzon; Pauluzzi, M.; Paus, C.; Pauss, F.; Pedace, M.; Pensotti, S.; Perret-Gallix, D.; Petersen, B.; Piccolo, D.; Pierella, F.; Piroue, P.A.; Pistolesi, E.; Plyaskin, V.; Pohl, M.; Pojidaev, V.; Postema, H.; Pothier, J.; Prokofiev, D.O.; Prokofiev, D.; Quartieri, J.; Rahal-Callot, G.; Rahaman, Mohammad Azizur; Raics, P.; Raja, N.; Ramelli, R.; Rancoita, P.G.; Ranieri, R.; Raspereza, A.; Razis, P.; Ren, D.; Rescigno, M.; Reucroft, S.; Riemann, S.; Riles, Keith; Roe, B.P.; Romero, L.; Rosca, A.; Rosier-Lee, S.; Roth, Stefan; Rosenbleck, C.; Roux, B.; Rubio, J.A.; Ruggiero, G.; Rykaczewski, H.; Sakharov, A.; Saremi, S.; Sarkar, S.; Salicio, J.; Sanchez, E.; Sanders, M.P.; Schafer, C.; Schegelsky, V.; Schmidt-Kaerst, S.; Schmitz, D.; Schopper, H.; Schotanus, D.J.; Schwering, G.; Sciacca, C.; Servoli, L.; Shevchenko, S.; Shivarov, N.; Shoutko, V.; Shumilov, E.; Shvorob, A.; Siedenburg, T.; Son, D.; Spillantini, P.; Steuer, M.; Stickland, D.P.; Stoyanov, B.; Straessner, A.; Sudhakar, K.; Sultanov, G.; Sun, L.Z.; Sushkov, S.; Suter, H.; Swain, J.D.; Szillasi, Z.; Tang, X.W.; Tarjan, P.; Tauscher, L.; Taylor, L.; Tellili, B.; Teyssier, D.; Timmermans, Charles; Ting, Samuel C.C.; Ting, S.M.; Tonwar, S.C.; Toth, J.; Tully, C.; Tung, K.L.; Uchida, Y.; Ulbricht, J.; Valente, E.; Van de Walle, R.T.; Veszpremi, V.; Vesztergombi, G.; Vetlitsky, I.; Vicinanza, D.; Viertel, G.; Villa, S.; Vivargent, M.; Vlachos, S.; Vodopianov, I.; Vogel, H.; Vogt, H.; Vorobiev, I.; Vorobyov, A.A.; Wadhwa, M.; Wallraff, W.; Wang, M.; Wang, X.L.; Wang, Z.M.; Weber, M.; Wienemann, P.; Wilkens, H.; Wu, S.X.; Wynhoff, S.; Xia, L.; Xu, Z.Z.; Yamamoto, J.; Yang, B.Z.; Yang, C.G.; Yang, H.J.; Yang, M.; Yeh, S.C.; Zalite, A.; Zalite, Yu.; Zhang, Z.P.; Zhao, J.; Zhu, G.Y.; Zhu, R.Y.; Zhuang, H.L.; Zichichi, A.; Zilizi, G.; Zimmermann, B.; Zoller, M.; Abbiendi, G.; Ainsley, C.; Akesson, P.F.; Alexander, G.; Allison, John; Amaral, P.; Anagnostou, G.; Anderson, K.J.; Arcelli, S.; Asai, S.; Axen, D.; Azuelos, G.; Bailey, I.; Barberio, E.; Barlow, R.J.; Batley, R.J.; Bechtle, P.; Behnke, T.; Bell, Kenneth Watson; Bell, P.J.; Bella, G.; Bellerive, A.; Benelli, G.; Bethke, S.; Biebel, O.; Bloodworth, I.J.; Boeriu, O.; Bock, P.; Bonacorsi, D.; Boutemeur, M.; Braibant, S.; Brigliadori, L.; Brown, Robert M.; Buesser, K.; Burckhart, H.J.; Campana, S.; Carnegie, R.K.; Caron, B.; Carter, A.A.; Carter, J.R.; Chang, C.Y.; Charlton, David G.; Csilling, A.; Cuffiani, M.; Dado, S.; Dallavalle, G.Marco; Dallison, S.; De Roeck, A.; De Wolf, E.A.; Desch, K.; Dienes, B.; Donkers, M.; Dubbert, J.; Duchovni, E.; Duckeck, G.; Duerdoth, I.P.; Elfgren, E.; Etzion, E.; Fabbri, F.; Feld, L.; Ferrari, P.; Fiedler, F.; Fleck, I.; Ford, M.; Frey, A.; Furtjes, A.; Gagnon, P.; Gary, John William; Gaycken, G.; Geich-Gimbel, C.; Giacomelli, G.; Giacomelli, P.; Giunta, Marina; Goldberg, J.; Gross, E.; Grunhaus, J.; Gruwe, M.; Gunther, P.O.; Gupta, A.; Hajdu, C.; Hamann, M.; Hanson, G.G.; Harder, K.; Harel, A.; Harin-Dirac, M.; Hauschild, M.; Hauschildt, J.; Hawkes, C.M.; Hawkings, R.; Hemingway, R.J.; Hensel, C.; Herten, G.; Heuer, R.D.; Hill, J.C.; Hoffman, Kara Dion; Homer, R.J.; Horvath, D.; Howard, R.; Huntemeyer, P.; Igo-Kemenes, P.; Ishii, K.; Jeremie, H.; Jovanovic, P.; Junk, T.R.; Kanaya, N.; Kanzaki, J.; Karapetian, G.; Karlen, D.; Kartvelishvili, V.; Kawagoe, K.; Kawamoto, T.; Keeler, R.K.; Kellogg, R.G.; Kennedy, B.W.; Kim, D.H.; Klein, K.; Klier, A.; Kluth, S.; Kobayashi, T.; Kobel, M.; Komamiya, S.; Kormos, Laura L.; Kowalewski, Robert V.; Kramer, T.; Kress, T.; Krieger, P.; von Krogh, J.; Krop, D.; Kruger, K.; Kupper, M.; Lafferty, G.D.; Landsman, H.; Lanske, D.; Layter, J.G.; Leins, A.; Lellouch, D.; Letts, J.; Levinson, L.; Lillich, J.; Lloyd, S.L.; Loebinger, F.K.; Lu, J.; Ludwig, J.; Macpherson, A.; Mader, W.; Marcellini, S.; Marchant, T.E.; Martin, A.J.; Masetti, G.; Mashimo, T.; Mattig, Peter; McDonald, W.J.; McKenna, J.; McMahon, T.J.; McPherson, R.A.; Meijers, F.; Mendez-Lorenzo, P.; Menges, W.; Merritt, F.S.; Mes, H.; Michelini, A.; Mihara, S.; Mikenberg, G.; Miller, D.J.; Moed, S.; Mohr, W.; Mori, T.; Mutter, A.; Nagai, K.; Nakamura, I.; Neal, H.A.; Nisius, R.; ONeale, S.W.; Oh, A.; Okpara, A.; Oreglia, M.J.; Orito, S.; Pahl, C.; Pasztor, G.; Pater, J.R.; Patrick, G.N.; Pilcher, J.E.; Pinfold, J.; Plane, David E.; Poli, B.; Polok, J.; Pooth, O.; Przybycien, M.; Quadt, A.; Rabbertz, K.; Rembser, C.; Renkel, P.; Rick, H.; Roney, J.M.; Rosati, S.; Rozen, Y.; Runge, K.; Sachs, K.; Saeki, T.; Sahr, O.; Sarkisyan, E.K.G.; Schaile, A.D.; Schaile, O.; Scharff-Hansen, P.; Schieck, J.; Schoerner-Sadenius, Thomas; Schroder, Matthias; Schumacher, M.; Schwick, C.; Scott, W.G.; Seuster, R.; Shears, T.G.; Shen, B.C.; Shepherd-Themistocleous, C.H.; Sherwood, P.; Siroli, G.; Skuja, A.; Smith, A.M.; Sobie, R.; Soldner-Rembold, S.; Spagnolo, S.; Spano, F.; Stahl, A.; Stephens, K.; Strom, David M.; Strohmer, R.; Tarem, S.; Tasevsky, M.; Taylor, R.J.; Teuscher, R.; Thomson, M.A.; Torrence, E.; Toya, D.; Tran, P.; Trefzger, T.; Tricoli, A.; Trigger, I.; Trocsanyi, Z.; Tsur, E.; Turner-Watson, M.F.; Ueda, I.; Ujvari, B.; Vachon, B.; Vollmer, C.F.; Vannerem, P.; Verzocchi, M.; Voss, H.; Vossebeld, J.; Waller, D.; Ward, C.P.; Ward, D.R.; Watkins, P.M.; Watson, A.T.; Watson, N.K.; Wells, P.S.; Wengler, T.; Wermes, N.; Wetterling, D.; Wilson, G.W.; Wilson, J.A.; Wyatt, T.R.; Yamashita, S.; Zer-Zion, D.; Zivkovic, Lidija; Heinemeyer, S.; Weiglein, G.

    2003-01-01

    The four LEP collaborations, ALEPH, DELPHI, L3 and OPAL, have collected a total of 2461 pb-1 of e+e- collision data at centre-of-mass energies between 189 and 209 GeV. The data are used to search for the Standard Model Higgs boson. The search results of the four collaborations are combined and examined in a likelihood test for their consistency with two hypotheses: the background hypothesis and the signal plus background hypothesis. The corresponding confidences have been computed as functions of the hypothetical Higgs boson mass. A lower bound of 114.4 GeV/c2 is established, at the 95% confidence level, on the mass of the Standard Model Higgs boson. The LEP data are also used to set upper bounds on the HZZ coupling for various assumptions concerning the decay of the Higgs boson.

  20. Search for neutral MSSM Higgs bosons at LEP

    CERN Document Server

    Schael, S.; Bruneliere, R.; De Bonis, I.; Decamp, D.; Goy, C.; Jezequel, S.; Lees, J.P.; Martin, F.; Merle, E.; Minard, M.N.; Pietrzyk, B.; Trocme, B.; Bravo, S.; Casado, M.P.; Chmeissani, M.; Crespo, J.M.; Fernandez, E.; Fernandez-Bosman, M.; Garrido, L.; Martinez, M.; Pacheco, A.; Ruiz, H.; Colaleo, A.; Creanza, D.; De Filippis, N.; de Palma, M.; Iaselli, G.; Maggi, G.; Maggi, M.; Nuzzo, S.; Ranieri, A.; Raso, G.; Ruggieri, F.; Selvaggi, G.; Silvestris, L.; Tempesta, P.; Tricomi, A.; Zito, G.; Huang, X.; Lin, J.; Ouyang, Q.; Wang, T.; Xie, Y.; Xu, R.; Xue, S.; Zhang, J.; Zhang, L.; Zhao, W.; Abbaneo, D.; Barklow, T.; Buchmuller, O.; Cattaneo, M.; Clerbaux, B.; Drevermann, H.; Forty, R.W.; Frank, M.; Gianotti, F.; Hansen, J.B.; Harvey, J.; Hutchcroft, D.E.; Janot, P.; Jost, B.; Kado, M.; Mato, P.; Moutoussi, A.; Ranjard, F.; Rolandi, L.; Schlatter, D.; Teubert, F.; Valassi, A.; Videau, I.; Badaud, F.; Dessagne, S.; Falvard, A.; Fayolle, D.; Gay, P.; Jousset, J.; Michel, B.; Monteil, S.; Pallin, D.; Pascolo, J.M.; Perret, P.; Hansen, J.D.; Hansen, J.R.; Hansen, P.H.; Kraan, A.C.; Nilsson, B.S.; Kyriakis, A.; Markou, C.; Simopoulou, E.; Vayaki, A.; Zachariadou, K.; Blondel, A.; Brient, J.C.; Machefert, F.; Rouge, A.; Videau, H.; Ciulli, V.; Focardi, E.; Parrini, G.; Antonelli, A.; Antonelli, M.; Bencivenni, G.; Bossi, F.; Capon, G.; Cerutti, F.; Chiarella, V.; Mannocchi, G.; Laurelli, P.; Mannocchi, G.; Murtas, G.P.; Passalacqua, L.; Kennedy, J.; Lynch, J.G.; Negus, P.; O'Shea, V.; Thompson, A.S.; Wasserbaech, S.; Cavanaugh, R.; Dhamotharan, S.; Geweniger, C.; Hanke, P.; Hepp, V.; Kluge, E.E.; Putzer, A.; Stenzel, H.; Tittel, K.; Wunsch, M.; Beuselinck, R.; Cameron, W.; Davies, G.; Dornan, P.J.; Girone, M.; Marinelli, N.; Nowell, J.; Rutherford, S.A.; Sedgbeer, J.K.; Thompson, J.C.; White, R.; Ghete, V.M.; Girtler, P.; Kneringer, E.; Kuhn, D.; Rudolph, G.; Bouhova-Thacker, E.; Bowdery, C.K.; Clarke, D.P.; Ellis, G.; Finch, A.J.; Foster, F.; Hughes, G.; Jones, R.W.L.; Pearson, M.R.; Robertson, N.A.; Smizanska, M.; van der Aa, O.; Delaere, C.; Leibenguth, G.; Lemaitre, V.; Blumenschein, U.; Holldorfer, F.; Jakobs, K.; Kayser, F.; Muller, A.S.; Renk, B.; Sander, H.G.; Schmeling, S.; Wachsmuth, H.; Zeitnitz, C.; Ziegler, T.; Bonissent, A.; Coyle, P.; Curtil, C.; Ealet, A.; Fouchez, D.; Payre, P.; Tilquin, A.; Ragusa, F.; David, A.; Dietl, H.; Ganis, G.; Huttmann, K.; Lutjens, G.; Manner, W.; Moser, H.G.; Settles, R.; Villegas, M.; Wolf, G.; Boucrot, J.; Callot, O.; Davier, M.; Duflot, L.; Grivaz, J.F.; Heusse, P.; Jacholkowska, A.; Serin, L.; Veillet, J.J.; Azzurri, P.; Bagliesi, G.; Boccali, T.; Foa, L.; Giammanco, A.; Giassi, A.; Ligabue, F.; Messineo, A.; Palla, F.; Sanguinetti, G.; Sciaba, A.; Sguazzoni, G.; Spagnolo, P.; Tenchini, R.; Venturi, A.; Verdini, P.G.; Awunor, O.; Blair, G.A.; Cowan, G.; Garcia-Bellido, A.; Green, M.G.; Medcalf, T.; Misiejuk, A.; Strong, J.A.; Teixeira-Dias, P.; Clifft, R.W.; Edgecock, T.R.; Norton, P.R.; Tomalin, I.R.; Ward, J.J.; Bloch-Devaux, B.; Boumediene, D.; Colas, P.; Fabbro, B.; Lancon, E.; Lemaire, M.C.; Locci, E.; Perez, P.; Rander, J.; Tuchming, B.; Vallage, B.; Litke, A.M.; Taylor, G.; Booth, C.N.; Cartwright, S.; Combley, F.; Hodgson, P.N.; Lehto, M.; Thompson, L.F.; Bohrer, A.; Brandt, S.; Grupen, C.; Hess, J.; Ngac, A.; Prange, G.; Borean, C.; Giannini, G.; He, H.; Putz, J.; Rothberg, J.; Armstrong, S.R.; Berkelman, K.; Cranmer, K.; Ferguson, D.P.S.; Gao, Y.; Gonzalez, S.; Hayes, O.J.; Hu, H.; Jin, S.; Kile, J.; McNamara, P.A.; Nielsen, J.; Pan, Y.B.; von Wimmersperg-Toeller, J.H.; Wiedenmann, W.; Wu, J.; Wu, S.L.; Wu, X.; Zobernig, G.; Dissertori, G.; Abdallah, J.; Abreu, P.; Adam, W.; Adzic, P.; Albrecht, T.; Alderweireld, T.; Alemany-Fernandez, R.; Allmendinger, T.; Allport, P.P.; Amaldi, U.; Amapane, N.; Amato, S.; Anashkin, E.; Andreazza, A.; Andringa, S.; Anjos, N.; Antilogus, P.; Apel, W.D.; Arnoud, Y.; Ask, S.; Asman, B.; Augustin, J.E.; Augustinus, A.; Baillon, P.; Ballestrero, A.; Bambade, P.; Barbier, R.; Bardin, D.; Barker, G.J.; Baroncelli, A.; Battaglia, M.; Baubillier, M.; Becks, K.H.; Begalli, M.; Behrmann, A.; Ben-Haim, E.; Benekos, N.; Benvenuti, A.; Berat, C.; Berggren, M.; Berntzon, L.; Bertrand, D.; Besancon, M.; Besson, N.; Bloch, D.; Blom, M.; Bluj, M.; Bonesini, M.; Boonekamp, M.; Booth, P.S.L.; Borisov, G.; Botner, O.; Bouquet, B.; Bowcock, T.J.V.; Boyko, I.; Bracko, M.; Brenner, R.; Brodet, E.; Bruckman, P.; Brunet, J.M.; Buschbeck, B.; Buschmann, P.; Calvi, M.; Camporesi, T.; Canale, V.; Carena, F.; Castro, N.; Cavallo, F.; Chapkin, M.; Charpentier, P.; Checchia, P.; Chierici, R.; Chliapnikov, P.; Chudoba, J.; Chung, S.U.; Cieslik, K.; Collins, P.; Contri, R.; Cosme, G.; Cossutti, F.; Costa, M.J.; Crennell, D.; Cuevas, J.; D'Hondt, J.; Dalmau, J.; da Silva, T.; Da Silva, W.; Della Ricca, G.; De Angelis, A.; De Boer, W.; De Clercq, C.; De Lotto, B.; De Maria, N.; De Min, A.; de Paula, L.; Di Ciaccio, L.; Di Simone, A.; Doroba, K.; Drees, J.; Eigen, G.; Ekelof, T.; Ellert, M.; Elsing, M.; Espirito Santo, M.C.; Fanourakis, G.; Fassouliotis, D.; Feindt, M.; Fernandez, J.; Ferrer, A.; Ferro, F.; Flagmeyer, U.; Foeth, H.; Fokitis, E.; Fulda-Quenzer, F.; Fuster, J.; Gandelman, M.; Garcia, C.; Gavillet, P.; Gazis, E.; Gokieli, R.; Golob, B.; Gomez-Ceballos, G.; Goncalves, P.; Graziani, E.; Grosdidier, G.; Grzelak, K.; Guy, J.; Haag, C.; Hallgren, A.; Hamacher, K.; Hamilton, K.; Haug, S.; Hauler, F.; Hedberg, V.; Hennecke, M.; Herr, H.; Hoffman, J.; Holmgren, S.O.; Holt, P.J.; Houlden, M.A.; Hultqvist, K.; Jackson, J.N.; Jarlskog, G.; Jarry, P.; Jeans, D.; Johansson, E.K.; Johansson, P.D.; Jonsson, P.; Joram, C.; Jungermann, L.; Kapusta, F.; Katsanevas, S.; Katsoufis, E.; Kernel, G.; Kersevan, B.P.; Kerzel, U.; King, B.T.; Kjaer, N.J.; Kluit, P.; Kokkinias, P.; Kourkoumelis, C.; Kouznetsov, O.; Krumstein, Z.; Kucharczyk, M.; Lamsa, J.; Leder, G.; Ledroit, F.; Leinonen, L.; Leitner, R.; Lemonne, J.; Lepeltier, V.; Lesiak, T.; Liebig, W.; Liko, D.; Lipniacka, A.; Lopes, J.H.; Lopez, J.M.; Loukas, D.; Lutz, P.; Lyons, L.; MacNaughton, J.; Malek, A.; Maltezos, S.; Mandl, F.; Marco, J.; Marco, R.; Marechal, B.; Margoni, M.; Marin, J.C.; Mariotti, C.; Markou, A.; Martinez-Rivero, C.; Masik, J.; Mastroyiannopoulos, N.; Matorras, F.; Matteuzzi, C.; Mazzucato, F.; Mazzucato, M.; Mc Nulty, R.; Meroni, C.; Migliore, E.; Mitaroff, W.; Mjoernmark, U.; Moa, T.; Moch, M.; Monig, Klaus; Monge, R.; Montenegro, J.; Moraes, D.; Moreno, S.; Morettini, P.; Mueller, U.; Muenich, K.; Mulders, M.; Mundim, L.; Murray, W.; Muryn, B.; Myatt, G.; Myklebust, T.; Nassiakou, M.; Navarria, F.; Nawrocki, K.; Nicolaidou, R.; Nikolenko, M.; Oblakowska-Mucha, A.; Obraztsov, V.; Olshevski, A.; Onofre, A.; Orava, R.; Osterberg, K.; Ouraou, A.; Oyanguren, A.; Paganoni, M.; Paiano, S.; Palacios, J.P.; Palka, H.; Papadopoulou, T.D.; Pape, L.; Parkes, C.; Parodi, F.; Parzefall, U.; Passeri, A.; Passon, O.; Peralta, L.; Perepelitsa, V.; Perrotta, A.; Petrolini, A.; Piedra, J.; Pieri, L.; Pierre, F.; Pimenta, M.; Piotto, E.; Podobnik, T.; Poireau, V.; Pol, M.E.; Polok, G.; Pozdniakov, V.; Pukhaeva, N.; Pullia, A.; Rames, J.; Read, A.; Rebecchi, P.; Rehn, J.; Reid, D.; Reinhardt, R.; Renton, P.; Richard, F.; Ridky, J.; Rivero, M.; Rodriguez, D.; Romero, A.; Ronchese, P.; Roudeau, P.; Rovelli, T.; Ruhlmann-Kleider, V.; Ryabtchikov, D.; Sadovsky, A.; Salmi, L.; Salt, J.; Sander, C.; Savoy-Navarro, A.; Schwickerath, U.; Segar, A.; Sekulin, R.; Siebel, M.; Sisakian, A.; Smadja, G.; Smirnova, O.; Sokolov, A.; Sopczak, A.; Sosnowski, R.; Spassov, T.; Stanitzki, M.; Stocchi, A.; Strauss, J.; Stugu, B.; Szczekowski, M.; Szeptycka, M.; Szumlak, T.; Tabarelli, T.; Taffard, A.C.; Tegenfeldt, F.; Timmermans, J.; Tkatchev, L.; Tobin, M.; Todorovova, S.; Tome, B.; Tonazzo, A.; Tortosa, P.; Travnicek, P.; Treille, D.; Tristram, G.; Trochimczuk, M.; Troncon, C.; Turluer, M.L.; Tyapkin, I.A.; Tyapkin, P.; Tzamarias, S.; Uvarov, V.; Valenti, G.; Van Dam, P.; Van Eldik, J.; van Remortel, N.; Van Vulpen, I.; Vegni, G.; Veloso, F.; Venus, W.; Verdier, P.; Verzi, V.; Vilanova, D.; Vitale, L.; Vrba, V.; Wahlen, H.; Washbrook, A.J.; Weiser, C.; Wicke, D.; Wickens, J.; Wilkinson, G.; Winter, M.; Witek, M.; Yushchenko, O.; Zalewska, A.; Zalewski, P.; Zavrtanik, D.; Zhuravlov, V.; Zimine, N.I.; Zintchenko, A.; Achard, P.; Zupan, M.; Adriani, O.; Aguilar-Benitez, M.; Alcaraz, J.; Alemanni, G.; Allaby, J.; Aloisio, A.; Alviggi, M.G.; Anderhub, H.; Andreev, V.P.; Anselmo, F.; Arefiev, A.; Azemoon, T.; Aziz, T.; Bagnaia, P.; Bajo, A.; Baksay, G.; Baksay, L.; Baldew, S.V.; Banerjee, S.; Banerjee, Sw.; Barczyk, A.; Barillere, R.; Bartalini, P.; Basile, M.; Batalova, N.; Battiston, R.; Bay, A.; Becattini, F.; Becker, U.; Behner, F.; Bellucci, L.; Berbeco, R.; Berdugo, J.; Berges, P.; Bertucci, B.; Betev, B.L.; Biasini, M.; Biglietti, M.; Biland, A.; Blaising, J.J.; Blyth, S.C.; Bobbink, G.J.; Bohm, A.; Boldizsar, L.; Borgia, B.; Bottai, S.; Bourilkov, D.; Bourquin, M.; Braccini, S.; Branson, J.G.; Brochu, F.; Burger, J.D.; Burger, W.J.; Cai, X.D.; Capell, M.; Cara Romeo, G.; Carlino, G.; Cartacci, A.; Casaus, J.; Cavallari, F.; Cavallo, N.; Cecchi, C.; Cerrada, M.; Chamizo, M.; Chang, Y.H.; Chemarin, M.; Chen, A.; Chen, G.; Chen, G.M.; Chen, H.F.; Chen, H.S.; Chiefari, G.; Cifarelli, L.; Cindolo, F.; Clare, I.; Clare, R.; Coignet, G.; Colino, N.; Costantini, S.; de la Cruz, B.; Cucciarelli, S.; de Asmundis, R.; Deglon, P.; Debreczeni, J.; Degre, A.; Dehmelt, K.; Deiters, K.; della Volpe, D.; Delmeire, E.; Denes, P.; DeNotaristefani, F.; De Salvo, A.; Diemoz, M.; Dierckxsens, M.; Dionisi, C.; Dittmar, M.; Doria, A.; Dova, M.T.; Duchesneau, D.; Duda, M.; Echenard, B.; Eline, A.; El Hage, A.; El Mamouni, H.; Engler, A.; Eppling, F.J.; Extermann, P.; Falagan, M.A.; Falciano, S.; Favara, A.; Fay, J.; Fedin, O.; Felcini, M.; Ferguson, T.; Fesefeldt, H.; Fiandrini, E.; Field, J.H.; Filthaut, F.; Fisher, P.H.; Fisher, W.; Forconi, G.; Freudenreich, K.; Furetta, C.; Galaktionov, Yu.; Ganguli, S.N.; Garcia-Abia, P.; Gataullin, M.; Gentile, S.; Giagu, S.; Gong, Z.F.; Grenier, G.; Grimm, O.; Gruenewald, M.W.; Guida, M.; Gupta, V.K.; Gurtu, A.; Gutay, L.J.; Haas, D.; Hatzifotiadou, D.; Hebbeker, T.; Herve, A.; Hirschfelder, J.; Hofer, H.; Hohlmann, M.; Holzner, G.; Hou, S.R.; Hu, J.; Jin, B.N.; Jindal, P.; Jones, L.W.; de Jong, P.; Josa-Mutuberra, I.; Kaur, M.; Kienzle-Focacci, M.N.; Kim, J.K.; Kirkby, J.; Kittel, W.; Klimentov, A.; Konig, A.C.; Kopal, M.; Koutsenko, V.; Kraber, M.; Kraemer, R.W.; Kruger, A.; Kunin, A.; Ladron de Guevara, P.; Laktineh, I.; Landi, G.; Lebeau, M.; Lebedev, A.; Lebrun, P.; Lecomte, P.; Lecoq, P.; Le Coultre, P.; Le Goff, J.M.; Leiste, R.; Levtchenko, M.; Levtchenko, P.; Li, C.; Likhoded, S.; Lin, C.H.; Lin, W.T.; Linde, F.L.; Lista, L.; Liu, Z.A.; Lohmann, W.; Longo, E.; Lu, Y.S.; Luci, C.; Luminari, L.; Lustermann, W.; Ma, W.G.; Malgeri, L.; Malinin, A.; Mana, C.; Mans, J.; Martin, J.P.; Marzano, F.; Mazumdar, K.; McNeil, R.R.; Mele, S.; Merola, L.; Meschini, M.; Metzger, W.J.; Mihul, A.; Milcent, H.; Mirabelli, G.; Mnich, J.; Mohanty, G.B.; Muanza, G.S.; Muijs, A.J.M.; Musicar, B.; Musy, M.; Nagy, S.; Natale, S.; Napolitano, M.; Nessi-Tedaldi, F.; Newman, H.; Nisati, A.; Novak, T.; Nowak, H.; Ofierzynski, R.; Organtini, G.; Pal, I.; Palomares, C.; Paolucci, P.; Paramatti, R.; Passaleva, G.; Patricelli, S.; Paul, T.; Pauluzzi, M.; Paus, C.; Pauss, F.; Pedace, M.; Pensotti, S.; Perret-Gallix, D.; Piccolo, D.; Pierella, F.; Pieri, M.; Pioppi, M.; Piroue, P.A.; Pistolesi, E.; Plyaskin, V.; Pohl, M.; Pojidaev, V.; Pothier, J.; Prokofiev, D.; Rahal-Callot, G.; Rahaman, M.A.; Raics, P.; Raja, N.; Ramelli, R.; Rancoita, P.G.; Ranieri, R.; Raspereza, A.; Razis, P.; Rembeczki, S.; Ren, D.; Rescigno, M.; Reucroft, S.; Riemann, S.; Riles, Keith; Roe, B.P.; Romero, L.; Rosca, A.; Rosemann, C.; Rosenbleck, C.; Rosier-Lees, S.; Roth, S.; Rubio, J.A.; Ruggiero, G.; Rykaczewski, H.; Sakharov, A.; Saremi, S.; Sarkar, S.; Salicio, J.; Sanchez, E.; Schafer, C.; Schegelsky, V.; 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Alexander, G.; Allison, J.; Amaral, P.; Anagnostou, G.; Anderson, K.J.; Asai, S.; Axen, D.; Azuelos, G.; Bailey, I.; Barberio, E.; Barillari, T.; Barlow, R.J.; Batley, R.J.; Bechtle, P.; Behnke, T.; Bell, K.W.; Bell, P.J.; Bella, G.; Bellerive, A.; Benelli, G.; Bethke, S.; Biebel, O.; Boeriu, O.; Bock, P.; Boutemeur, M.; Braibant, S.; Brigliadori, L.; Brown, R.M.; Buesser, K.; Burckhart, H.J.; Campana, S.; Carnegie, R.K.; Carter, A.A.; Carter, J.R.; Chang, C.Y.; Charlton, D.G.; Ciocca, C.; Csilling, A.; Cuffiani, M.; Dado, S.; de Jong, S.; De Roeck, A.; De Wolf, E.A.; Desch, K.; Dienes, B.; Donkers, M.; Dubbert, J.; Duchovni, E.; Duckeck, G.; Duerdoth, I.P.; Etzion, E.; Fabbri, F.; Feld, L.; Ferrari, P.; Fiedler, F.; Fleck, I.; Ford, M.; Frey, A.; Gagnon, P.; Gary, J.W.; Gascon-Shotkin, S.M.; Gaycken, G.; Geich-Gimbel, C.; Giacomelli, G.; Giacomelli, P.; Giunta, M.; Goldberg, J.; Gross, E.; Grunhaus, J.; Gruwe, M.; Gunther, P.O.; Gupta, A.; Hajdu, C.; Hamann, M.; Hanson, G.G.; Harel, A.; Hauschild, M.; Hawkes, C.M.; Hawkings, R.; Hemingway, R.J.; Herten, G.; Heuer, R.D.; Hill, J.C.; Hoffman, K.; Horvath, D.; Igo-Kemenes, P.; Ishii, K.; Jeremie, H.; Jost, U.; Jovanovic, P.; Junk, T.R.; Kanaya, N.; Kanzaki, J.; Karlen, D.; Kawagoe, K.; Kawamoto, T.; Keeler, R.K.; Kellogg, R.G.; Kennedy, B.W.; Kluth, S.; Kobayashi, T.; Kobel, M.; Komamiya, S.; Kramer, T.; Krieger, P.; von Krogh, J.; Kruger, K.; Kuhl, T.; Kupper, M.; Lafferty, G.D.; Landsman, H.; Lanske, D.; Layter, J.G.; Lellouch, D.; Letts, J.; Levinson, L.; Lillich, J.; Lloyd, S.L.; Loebinger, F.K.; Lu, J.; Ludwig, A.; Ludwig, J.; Mader, W.; Marcellini, S.; Martin, A.J.; Masetti, G.; Mashimo, T.; Mattig, P.; McKenna, J.; McPherson, R.A.; Meijers, F.; Menges, W.; Merritt, F.S.; Mes, H.; Meyer, N.; Michelini, A.; Mihara, S.; Mikenberg, G.; Miller, D.J.; Moed, S.; Mohr, W.; Mori, T.; Mutter, A.; Nagai, K.; Nakamura, I.; Nanjo, H.; Neal, H.A.; Nisius, R.; O'Neale, S.W.; Oh, A.; Oreglia, M.J.; Orito, S.; Pahl, C.; Pasztor, G.; Pater, J.R.; Pilcher, J.E.; Pinfold, J.; Plane, D.E.; Poli, B.; Pooth, O.; Przybycien, M.; Quadt, A.; Rabbertz, K.; Rembser, C.; Renkel, P.; Roney, J.M.; Rozen, Y.; Runge, K.; Sachs, K.; Saeki, T.; Sarkisyan, E.K.G.; Schaile, A.D.; Schaile, O.; Scharff-Hansen, P.; Schieck, J.; Schorner-Sadenius, T.; Schroder, M.; Schumacher, M.; Scott, W.G.; Seuster, R.; Shears, T.G.; Shen, B.C.; Sherwood, P.; Skuja, A.; Smith, A.M.; Sobie, R.; Soldner-Rembold, S.; Spano, F.; Stahl, A.; Strom, D.; Strohmer, R.; Tarem, S.; Tasevsky, M.; Teuscher, R.; Thomson, M.A.; Torrence, E.; Toya, D.; Tran, P.; Trigger, I.; Trocsanyi, Z.; Tsur, E.; Turner-Watson, M.F.; Ueda, I.; Ujvari, B.; Vollmer, C.F.; Vannerem, P.; Vertesi, R.; Verzocchi, M.; Voss, H.; Vossebeld, J.; Ward, C.P.; Ward, D.R.; Watkins, P.M.; Watson, A.T.; Watson, N.K.; Wells, P.S.; Wengler, T.; Wermes, N.; Wilson, G.W.; Wilson, J.A.; Wolf, G.; Wyatt, T.R.; Yamashita, S.; Zer-Zion, D.; Zivkovic, L.; Heinemeyer, S.; Pilaftsis, A.; Weiglein, G.

    2006-01-01

    The four LEP collaborations, ALEPH, DELPHI, L3 and OPAL, have searched for the neutral Higgs bosons which are predicted by the Minimal Supersymmetric Standard Model (MSSM). The data of the four collaborations are statistically combined and examined for their consistency with the background hypothesis and with a possible Higgs boson signal. The combined LEP data show no significant excess of events which would indicate the production of Higgs bosons. The search results are used to set upper bounds on the cross-sections of various Higgs-like event topologies. The results are interpreted within the MSSM in a number of ``benchmark" models, including CP-conserving and CP-violating scenarios. These interpretations lead in all cases to large exclusions in the MSSM parameter space. Absolute limits are set on the parameter tanb and, in some scenarios, on the masses of neutral Higgs bosons.

  1. Search for neutralinos in the Z0 decay at LEP

    International Nuclear Information System (INIS)

    Hidaka, K.; Ratcliffe, P.

    1991-01-01

    We investigate neutralino production process e - e + →Z 0 →z k z k' at the Z 0 peak. Recent LEP and SLC data on Z 0 decays (such as total and invisible width of Z 0 and unsuccessful searches for chargino pairs and acoplanar charged lepton pairs and jet pairs) and the gluino search experiments at S(p-bar)pS and TEVATRON significantly constrain the mass matrix parameters of chargino and neutralino sectors. We find that despite these constraints there still remains a sizable 'window' in the parameter space really open for discovering neutralinos in the Z 0 decay at LEP. Encouraged by this observation we evaluate the event distributions for the detected particles in this process. The information these can provide would be valuable in identifying this production mechanism and the new particles responsible for it, including their spins, masses and couplings. (author)

  2. Tests of electroweak interactions at CERN's LEP Collider

    Science.gov (United States)

    Fearnley, T. A.

    1995-08-01

    Precision measurements of electroweak interactions at the Z0 energy are performed at four experiments at the Large Electron Positron (LEP) Collider at CERN in Geneva, Switzerland. The large amount of data obtained from 1989 until today allows detailed comparisons with the predictions made by the Standard Model. Within the experimental errors the agreement with the Standard Model is good. Fits to the LEP data allow an indirect determination of the mass of the top quark: Mt=173+12+18-13-20 GeV, assuming a Higgs boson mass of 300 GeV. The first errors reflect the experimental errors (systematic and statistical) on the measurements. The second errors correspond to the variation of the central value when varying the Higgs mass between 60 and 1000 GeV. This paper reviews the results of the measurements of electroweak interactions, and compares the results with predictions made by the Standard Model.

  3. A Study of $W^{+}W^{-}\\gamma$ Events at LEP

    CERN Document Server

    Abbiendi, G; Åkesson, P F; Alexander, G; Allison, J; Amaral, P; Anagnostou, G; Anderson, K J; Arcelli, S; Asai, S; Axen, D A; Azuelos, Georges; Bailey, I; Barberio, E; Barlow, R J; Batley, J Richard; Bechtle, P; Behnke, T; Bell, K W; Bell, P J; Bella, G; Bellerive, A; Benelli, G; Bethke, Siegfried; Biebel, O; Boeriu, O; Bock, P; Boutemeur, M; Braibant, S; Brigliadori, L; Brown, R M; Büsser, K; Burckhart, H J; Campana, S; Carnegie, R K; Caron, B; Carter, A A; Carter, J R; Chang, C Y; Charlton, D G; Csilling, Akos; Cuffiani, M; Dado, S; de Roeck, A; De Wolf, E A; Desch, Klaus; Dienes, B; Donkers, M; Dubbert, J; Duchovni, E; Duckeck, G; Duerdoth, I P; Etzion, E; Fabbri, Franco Luigi; Feld, L; Ferrari, P; Fiedler, F; Fleck, I; Ford, M; Frey, A; Fürtjes, A; Gagnon, P; Gary, J W; Gaycken, G; Geich-Gimbel, C; Giacomelli, G; Giacomelli, P; Giunta, M; Goldberg, J; Gross, E; Grunhaus, Jacob; Gruwé, M; Günther, P O; Sen-Gupta, A; Hajdu, C; Hamann, M; Hanson, G G; Harder, K; Harel, A; Harin-Dirac, M; Hauschild, M; Hawkes, C M; Hawkings, R; Hemingway, Richard J; Hensel, C; Herten, G; Heuer, R D; Hill, J C; Hoffman, K; Horváth, D; Igo-Kemenes, P; Ishii, K; Jeremie, H; Jovanovic, P; Junk, T R; Kanaya, N; Kanzaki, J; Karapetian, G V; Karlen, Dean A; Kawagoe, K; Kawamoto, T; Keeler, Richard K; Kellogg, R G; Kennedy, B W; Kim, D H; Klein, K; Klier, A; Kluth, S; Kobayashi, T; Kobel, M; Komamiya, S; Kormos, L L; Kramer, T; Krieger, P; Von Krogh, J; Krüger, K; Kühl, T; Kupper, M; Lafferty, G D; Landsman, Hagar Yaël; Lanske, D; Layter, J G; Leins, A; Lellouch, D; Letts, J; Levinson, L; Lillich, J; Lloyd, S L; Loebinger, F K; Lü, J; Ludwig, J; MacPherson, A; Mader, W; Marcellini, S; Martin, A J; Masetti, G; Mashimo, T; Mättig, P; McDonald, W J; McKenna, J A; McMahon, T J; McPherson, R A; Meijers, F; Menges, W; Merritt, F S; Mes, H; Michelini, Aldo; Mihara, S; Mikenberg, G; Miller, D J; Moed, S; Mohr, W; Mori, T; Mutter, A; Nagai, K; Nakamura, I; Nanjo, H; Neal, H A; Nisius, R; O'Neale, S W; Oh, A; Okpara, A N; Oreglia, M J; Orito, S; Pahl, C; Pásztor, G; Pater, J R; Patrick, G N; Pilcher, J E; Pinfold, J L; Plane, D E; Poli, B; Polok, J; Pooth, O; Przybycien, M B; Quadt, A; Rabbertz, K; Rembser, C; Renkel, P; Roney, J M; Rosati, S; Rozen, Y; Runge, K; Sachs, K; Saeki, T; Sarkisyan-Grinbaum, E; Schaile, A D; Schaile, O; Scharff-Hansen, P; Schieck, J; Schörner-Sadenius, T; Schröder, M; Schumacher, M; Schwick, C; Scott, W G; Seuster, R; Shears, T G; Shen, B C; Sherwood, P; Siroli, G P; Skuja, A; Smith, A M; Sobie, R J; Söldner-Rembold, S; Spanó, F; Stahl, A; Stephens, K; Strom, D; Ströhmer, R; Tarem, S; Tasevsky, M; Taylor, R J; Teuscher, R; Thomson, M A; Torrence, E; Toya, D; Tran, P; Trigger, I; Trócsányi, Z L; Tsur, E; Turner-Watson, M F; Ueda, I; Ujvári, B; Vollmer, C F; Vannerem, P; Vertesi, R; Verzocchi, M; Voss, H; Vossebeld, Joost Herman; Waller, D; Ward, C P; Ward, D R; Watkins, P M; Watson, A T; Watson, N K; Wells, P S; Wengler, T; Wermes, N; Wetterling, D; Wilson, G W; Wilson, J A; Wolf, G; Wyatt, T R; Yamashita, S; Zer-Zion, D; Zivkovic, L

    2004-01-01

    A study of W+W- events accomanied by hard photon radiation produced in e+e- collisions at LEP is presented. Events consistent with being two on-shell W bosons and an isolated photon are selected from 681 pb^-1 of data recorded at 180 GeV < sqrt(s) < 209 GeV. For these data , 187 W+W- candidates are selected with photon energies greater than 2.5 GeV. The selected events are used to determine the W+ W- gamma cross section at five values of sqrt(s). The results are consistent with the Standard Model expectation. These data provide constraints on the related O(alpha) systematic uncertainties on the measurement of the W boson mass at LEP. Finally, the data are used to derive 95% C.L. upper limits on possible anomalous contributions to the W+ W- gamma gamma and W+ W- Z0 gamma vertices.

  4. $B^{0}\\overline{B^{0}}$ oscillations at LEP

    CERN Document Server

    Palla, Fabrizio

    2001-01-01

    We report the LEP results on B/sup 0/B/sup 0/ oscillations, together with a review of the analysis strategies. Many measurements of the B /sub d//sup 0/ oscillation frequency have been performed giving an average, Delta m/sub d/=0.486+or-0.015 ps/sup -1/. Lower limits on Delta m/sub s/ are presented, giving a LEP-combined limit, Delta m /sub s/>11.8 ps/sup -1/, with an expected exclusion limit of 14.5 ps /sup -1/. When combined with SLD and CDF, a tantalising 2.5% effect at about 17 ps/sup -1/ is observed, having a probability of about 2.5% for a fluctuation of a sample where the true frequency is beyond the global sensitivity. (19 refs).

  5. The Prevessin Control Room during LEP's start up in 1989.

    CERN Multimedia

    1989-01-01

    The Prévessin Control Room saw its first momentous event when the 400 GeV beam for the SPS was commissioned in the presence of Project Leader John Adams. It was also here that the first proton-antiproton collisions were observed, in 1981. Eight years later, in 1989, operators and directors alike jumped for joy at the announcement of the first electron-positron collisions at the start up of LEP, the biggest accelerator in the world.

  6. Search for Scalar Leptons and Scalar Quarks at LEP

    CERN Document Server

    Achard, P.; Aguilar-Benitez, M.; Alcaraz, J.; Alemanni, G.; Allaby, J.; Aloisio, A.; Alviggi, M.G.; Anderhub, H.; Andreev, Valery P.; Anselmo, F.; Arefev, A.; Azemoon, T.; Aziz, T.; Bagnaia, P.; Bajo, A.; Baksay, G.; Baksay, L.; Baldew, S.V.; Banerjee, S.; Barczyk, A.; Barillere, R.; Bartalini, P.; Basile, M.; Batalova, N.; Battiston, R.; Bay, A.; Becattini, F.; Becker, U.; Behner, F.; Bellucci, L.; Berbeco, R.; Berdugo, J.; Berges, P.; Bertucci, B.; Betev, B.L.; Biasini, M.; Biglietti, M.; Biland, A.; Blaising, J.J.; Blyth, S.C.; Bobbink, G.J.; Bohm, A.; Boldizsar, L.; Borgia, B.; Bottai, S.; Bourilkov, D.; Bourquin, M.; Braccini, S.; Branson, J.G.; Brochu, F.; Burger, J.D.; Burger, W.J.; Cai, X.D.; Capell, M.; Cara Romeo, G.; Carlino, G.; Cartacci, A.; Casaus, J.; Cavallari, F.; Cavallo, N.; Cecchi, C.; Cerrada, M.; Chamizo, M.; Chang, Y.H.; Chemarin, M.; Chen, A.; Chen, G.; Chen, G.M.; Chen, H.F.; Chen, H.S.; Chiefari, G.; Cifarelli, L.; Cindolo, F.; Clare, I.; Clare, R.; Coignet, G.; Colino, N.; Costantini, S.; de la Cruz, B.; Cucciarelli, S.; van Dalen, J.A.; de Asmundis, R.; Deglon, P.; Debreczeni, J.; Degre, A.; Dehmelt, K.; Deiters, K.; della Volpe, D.; Delmeire, E.; Denes, P.; DeNotaristefani, F.; De Salvo, A.; Diemoz, M.; Dierckxsens, M.; Dionisi, C.; Dittmar, M.; Doria, A.; Dova, M.T.; Duchesneau, D.; Duda, M.; Echenard, B.; Eline, A.; El Hage, A.; El Mamouni, H.; Engler, A.; Eppling, F.J.; Extermann, P.; Falagan, M.A.; Falciano, S.; Favara, A.; Fay, J.; Fedin, O.; Felcini, M.; Ferguson, T.; Fesefeldt, H.; Fiandrini, E.; Field, J.H.; Filthaut, F.; Fisher, P.H.; Fisher, W.; Fisk, I.; Forconi, G.; Freudenreich, K.; Furetta, C.; Galaktionov, Iouri; Ganguli, S.N.; Garcia-Abia, Pablo; Gataullin, M.; Gentile, S.; Giagu, S.; Gong, Z.F.; Grenier, Gerald Jean; Grimm, O.; Gruenewald, M.W.; Guida, M.; van Gulik, R.; Gupta, V.K.; Gurtu, A.; Gutay, L.J.; Haas, D.; Hatzifotiadou, D.; Hebbeker, T.; Herve, Alain; Hirschfelder, J.; Hofer, H.; Hohlmann, M.; Holzner, G.; Hou, S.R.; Hu, Y.; Jin, B.N.; Jones, Lawrence W.; de Jong, P.; Josa-Mutuberria, I.; Kafer, D.; Kaur, M.; Kienzle-Focacci, M.N.; Kim, J.K.; Kirkby, Jasper; Kittel, W.; Klimentov, A.; Konig, A.C.; Kopal, M.; Koutsenko, V.; Kraber, M.; Kraemer, R.W.; Kruger, A.; Kunin, A.; Ladron de Guevara, P.; Laktineh, I.; Landi, G.; Lebeau, M.; Lebedev, A.; Lebrun, P.; Lecomte, P.; Lecoq, P.; Le Coultre, P.; Le Goff, J.M.; Leiste, R.; Levtchenko, M.; Levtchenko, P.; Li, C.; Likhoded, S.; Lin, C.H.; Lin, W.T.; Linde, F.L.; Lista, L.; Liu, Z.A.; Lohmann, W.; Longo, E.; Lu, Y.S.; Luci, C.; Luminari, L.; Lustermann, W.; Ma, W.G.; Malgeri, L.; Malinin, A.; Mana, C.; Mans, J.; Martin, J.P.; Marzano, F.; Mazumdar, K.; McNeil, R.R.; Mele, S.; Merola, L.; Meschini, M.; Metzger, W.J.; Mihul, A.; Milcent, H.; Mirabelli, G.; Mnich, J.; Mohanty, G.B.; Muanza, G.S.; Muijs, A.J.M.; Musicar, B.; Musy, M.; Nagy, S.; Natale, S.; Napolitano, M.; Nessi-Tedaldi, F.; Newman, H.; Nisati, A.; Novak, T.; Kluge, Hannelies; Ofierzynski, R.; Organtini, G.; Pal, I.; Palomares, C.; Paolucci, P.; Paramatti, R.; Passaleva, G.; Patricelli, S.; Paul, Thomas Cantzon; Pauluzzi, M.; Paus, C.; Pauss, F.; Pedace, M.; Pensotti, S.; Perret-Gallix, D.; Petersen, B.; Piccolo, D.; Pierella, F.; Pioppi, M.; Piroue, P.A.; Pistolesi, E.; Plyaskin, V.; Pohl, M.; Pojidaev, V.; Pothier, J.; Prokofev, D.; Quartieri, J.; Rahal-Callot, G.; Rahaman, Mohammad Azizur; Raics, P.; Raja, N.; Ramelli, R.; Rancoita, P.G.; Ranieri, R.; Raspereza, A.; Razis, P.; Ren, D.; Rescigno, M.; Reucroft, S.; Riemann, S.; Riles, Keith; Roe, B.P.; Romero, L.; Rosca, A.; Rosier-Lees, S.; Roth, Stefan; Rosenbleck, C.; Roux, B.; Rubio, J.A.; Ruggiero, G.; Rykaczewski, H.; Sakharov, A.; Saremi, S.; Sarkar, S.; Salicio, J.; Sanchez, E.; Schafer, C.; Schegelsky, V.; Schopper, H.; Schotanus, D.J.; Sciacca, C.; Servoli, L.; Shevchenko, S.; Shivarov, N.; Shoutko, V.; Shumilov, E.; Shvorob, A.; Son, D.; Souga, C.; Spillantini, P.; Steuer, M.; Stickland, D.P.; Stoyanov, B.; Straessner, A.; Sudhakar, K.; Sultanov, G.; Sun, L.Z.; Sushkov, S.; Suter, H.; Swain, J.D.; Szillasi, Z.; Tang, X.W.; Tarjan, P.; Tauscher, L.; Taylor, L.; Tellili, B.; Teyssier, D.; Timmermans, Charles; Ting, Samuel C.C.; Ting, S.M.; Tonwar, S.C.; Toth, J.; Tully, C.; Tung, K.L.; Ulbricht, J.; Valente, E.; Van de Walle, R.T.; Vasquez, R.; Veszpremi, V.; Vesztergombi, G.; Vetlitsky, I.; Vicinanza, D.; Viertel, G.; Villa, S.; Vivargent, M.; Vlachos, S.; Vodopianov, I.; Vogel, H.; Vogt, H.; Vorobev, I.; Vorobyov, A.A.; Wadhwa, M.; Wang, Q.; Wang, X.L.; Wang, Z.M.; Weber, M.; Wienemann, P.; Wilkens, H.; Wynhoff, S.; Xia, L.; Xu, Z.Z.; Yamamoto, J.; Yang, B.Z.; Yang, C.G.; Yang, H.J.; Yang, M.; Yeh, S.C.; Zalite, A.; Zalite, Yu.; Zhang, Z.P.; Zhao, J.; Zhu, G.Y.; Zhu, R.Y.; Zhuang, H.L.; Zichichi, A.; Zimmermann, B.; Zoller, M.

    2004-01-01

    Scalar partners of quarks and leptons, predicted in supersymmetric models, are searched for in e^+e^- collisions at centre-of-mass energies between 192GeV and 209GeV at LEP. No evidence for any such particle is found in a data sample of 450 pb^-1. Upper limits on their production cross sections are set and lower limits on their masses are derived in the framework of the Minimal Supersymmetric Standard Model.

  7. Inclusive Lambda Production in Two-Photon Collisions at LEP

    CERN Document Server

    Achard, P.; Aguilar-Benitez, M.; Alcaraz, J.; Alemanni, G.; Allaby, J.; Aloisio, A.; Alviggi, M.G.; Anderhub, H.; Andreev, Valery P.; Anselmo, F.; Arefev, A.; Azemoon, T.; Aziz, T.; Bagnaia, P.; Bajo, A.; Baksay, G.; Baksay, L.; Baldew, S.V.; Banerjee, S.; Banerjee, Sw.; Barczyk, A.; Barillere, R.; Bartalini, P.; Basile, M.; Batalova, N.; Battiston, R.; Bay, A.; Becattini, F.; Becker, U.; Behner, F.; Bellucci, L.; Berbeco, R.; Berdugo, J.; Berges, P.; Bertucci, B.; Betev, B.L.; Biasini, M.; Biglietti, M.; Biland, A.; Blaising, J.J.; Blyth, S.C.; Bobbink, G.J.; Bohm, A.; Boldizsar, L.; Borgia, B.; Bottai, S.; Bourilkov, D.; Bourquin, M.; Braccini, S.; Branson, J.G.; Brochu, F.; Burger, J.D.; Burger, W.J.; Cai, X.D.; Capell, M.; Cara Romeo, G.; Carlino, G.; Cartacci, A.; Casaus, J.; Cavallari, F.; Cavallo, N.; Cecchi, C.; Cerrada, M.; Chamizo, M.; Chang, Y.H.; Chemarin, M.; Chen, A.; Chen, G.; Chen, G.M.; Chen, H.F.; Chen, H.S.; Chiefari, G.; Cifarelli, L.; Cindolo, F.; Clare, I.; Clare, R.; Coignet, G.; Colino, N.; Costantini, S.; de la Cruz, B.; Cucciarelli, S.; van Dalen, J.A.; de Asmundis, R.; Deglon, P.; Debreczeni, J.; Degre, A.; Dehmelt, K.; Deiters, K.; della Volpe, D.; Delmeire, E.; Denes, P.; DeNotaristefani, F.; De Salvo, A.; Diemoz, M.; Dierckxsens, M.; Dionisi, C.; Dittmar, M.; Doria, A.; Dova, M.T.; Duchesneau, D.; Duda, M.; Echenard, B.; Eline, A.; El Hage, A.; El Mamouni, H.; Engler, A.; Eppling, F.J.; Extermann, P.; Falagan, M.A.; Falciano, S.; Favara, A.; Fay, J.; Fedin, O.; Felcini, M.; Ferguson, T.; Fesefeldt, H.; Fiandrini, E.; Field, J.H.; Filthaut, F.; Fisher, P.H.; Fisher, W.; Fisk, I.; Forconi, G.; Freudenreich, K.; Furetta, C.; Galaktionov, Iouri; Ganguli, S.N.; Garcia-Abia, Pablo; Gataullin, M.; Gentile, S.; Giagu, S.; Gong, Z.F.; Grenier, Gerald Jean; Grimm, O.; Gruenewald, M.W.; Guida, M.; van Gulik, R.; Gupta, V.K.; Gurtu, A.; Gutay, L.J.; Haas, D.; Hatzifotiadou, D.; Hebbeker, T.; Herve, Alain; Hirschfelder, J.; Hofer, H.; Hohlmann, M.; Holzner, G.; Hou, S.R.; Hu, Y.; Jin, B.N.; Jones, Lawrence W.; de Jong, P.; Josa-Mutuberria, I.; Kaur, M.; Kienzle-Focacci, M.N.; Kim, J.K.; Kirkby, Jasper; Kittel, W.; Klimentov, A.; Konig, A.C.; Kopal, M.; Koutsenko, V.; Kraber, M.; Kraemer, R.W.; Kruger, A.; Kunin, A.; Ladron de Guevara, P.; Laktineh, I.; Landi, G.; Lebeau, M.; Lebedev, A.; Lebrun, P.; Lecomte, P.; Lecoq, P.; Le Coultre, P.; Le Goff, J.M.; Leiste, R.; Levtchenko, M.; Levtchenko, P.; Li, C.; Likhoded, S.; Lin, C.H.; Lin, W.T.; Linde, F.L.; Lista, L.; Liu, Z.A.; Lohmann, W.; Longo, E.; Lu, Y.S.; Luci, C.; Luminari, L.; Lustermann, W.; Ma, W.G.; Malgeri, L.; Malinin, A.; Mana, C.; Mans, J.; Martin, J.P.; Marzano, F.; Mazumdar, K.; McNeil, R.R.; Mele, S.; Merola, L.; Meschini, M.; Metzger, W.J.; Mihul, A.; Milcent, H.; Mirabelli, G.; Mnich, J.; Mohanty, G.B.; Muanza, G.S.; Muijs, A.J.M.; Musicar, B.; Musy, M.; Nagy, S.; Natale, S.; Napolitano, M.; Nessi-Tedaldi, F.; Newman, H.; Nisati, A.; Novak, T.; Kluge, Hannelies; Ofierzynski, R.; Organtini, G.; Pal, I.; Palomares, C.; Paolucci, P.; Paramatti, R.; Passaleva, G.; Patricelli, S.; Paul, Thomas Cantzon; Pauluzzi, M.; Paus, C.; Pauss, F.; Pedace, M.; Pensotti, S.; Perret-Gallix, D.; Petersen, B.; Piccolo, D.; Pierella, F.; Pioppi, M.; Piroue, P.A.; Pistolesi, E.; Plyaskin, V.; Pohl, M.; Pojidaev, V.; Pothier, J.; Prokofev, D.; Quartieri, J.; Rahal-Callot, G.; Rahaman, Mohammad Azizur; Raics, P.; Raja, N.; Ramelli, R.; Rancoita, P.G.; Ranieri, R.; Raspereza, A.; Razis, P.; Ren, D.; Rescigno, M.; Reucroft, S.; Riemann, S.; Riles, Keith; Roe, B.P.; Romero, L.; Rosca, A.; Rosemann, C.; Rosenbleck, C.; Rosier-Lees, S.; Roth, Stefan; Rubio, J.A.; Ruggiero, G.; Rykaczewski, H.; Sakharov, A.; Saremi, S.; Sarkar, S.; Salicio, J.; Sanchez, E.; Schafer, C.; Schegelsky, V.; Schopper, H.; Schotanus, D.J.; Sciacca, C.; Servoli, L.; Shevchenko, S.; Shivarov, N.; Shoutko, V.; Shumilov, E.; Shvorob, A.; Son, D.; Souga, C.; Spillantini, P.; Steuer, M.; Stickland, D.P.; Stoyanov, B.; Straessner, A.; Sudhakar, K.; Sultanov, G.; Sun, L.Z.; Sushkov, S.; Suter, H.; Swain, J.D.; Szillasi, Z.; Tang, X.W.; Tarjan, P.; Tauscher, L.; Taylor, L.; Tellili, B.; Teyssier, D.; Timmermans, Charles; Ting, Samuel C.C.; Ting, S.M.; Tonwar, S.C.; Toth, J.; Tully, C.; Tung, K.L.; Ulbricht, J.; Valente, E.; Van de Walle, R.T.; Vasquez, R.; Veszpremi, V.; Vesztergombi, G.; Vetlitsky, I.; Vicinanza, D.; Viertel, G.; Villa, S.; Vivargent, M.; Vlachos, S.; Vodopianov, I.; Vogel, H.; Vogt, H.; Vorobev, I.; Vorobyov, A.A.; Wadhwa, M.; Wang, Q.Wang X.L.; Wang, Z.M.; Weber, M.; Wilkens, H.; Wynhoff, S.; Xia, L.; Xu, Z.Z.; Yamamoto, J.; Yang, B.Z.; Yang, C.G.; Yang, H.J.; Yang, M.; Yeh, S.C.; Zalite, An.; Zalite, Yu.; Zhang, Z.P.; Zhao, J.; Zhu, G.Y.; Zhu, R.Y.; Zhuang, H.L.; Zichichi, A.; Zimmermann, B.; Zoller, M.

    2004-01-01

    The reactions e^+e^- -> e^+e^- Lambda X and e^+e^- -> e^+e^- Lambda X are studied using data collected at LEP with the L3 detector at centre-of-mass energies between 189 and 209 GeV. Inclusive differential cross sections are measured as a function of the lambda transverse momentum, p_t, and pseudo-rapidity, eta, in the ranges 0.4 GeV )$.

  8. Around the Laboratories: CERN LEP vintage 1991; SuperLEARative

    Energy Technology Data Exchange (ETDEWEB)

    Anon.

    1992-01-15

    When CERN's 27-kilometre LEP electron-positron collider finished its 1991 run in mid-November, the four big experiments - Aleph, Delphi, L3 and Opal - had each amassed about 300,000 Z particles over eight months. ; With CERN's SPS ring now only occasionally serving as a protonantiproton collider, the LEAR low energy antiproton ring at CERN is the main client for CERN's antiproton supply system.

  9. New physics with three-photon events at LEP

    International Nuclear Information System (INIS)

    Baillargeon, M.; Chopin, E.; Lafage, V.

    1996-01-01

    The effect a general Z→3γ vertex in the reaction e + e - →3γ is studied with a particular attention to LEP searches. We give exact analytical expressions including realistic cuts for the signal and present a detailed analysis based on a Monte Carlo that includes the effect of the irreducible 3γ QED cross section. As special applications we discuss the effect of heavy scalars, fermions and gauge bosons. (orig.)

  10. Degenerate Higgs and Z boson at Lep200

    International Nuclear Information System (INIS)

    Brown, N.

    1990-08-01

    We investigate the problem of detecting the Higgs boson if M H ≅ M Z at LEP200, the main problem being the large background from ZZ production. Since this background should be accurately calculable, we estimate that the existence of the Higgs can be established with about 3fb -1 of integrated luminosity. We also discuss how the signal can be improved if efficient tagging of b quarks is available. (author)

  11. Around the Laboratories: CERN LEP vintage 1991; SuperLEARative

    International Nuclear Information System (INIS)

    Anon.

    1992-01-01

    When CERN's 27-kilometre LEP electron-positron collider finished its 1991 run in mid-November, the four big experiments - Aleph, Delphi, L3 and Opal - had each amassed about 300,000 Z particles over eight months. ; With CERN's SPS ring now only occasionally serving as a protonantiproton collider, the LEAR low energy antiproton ring at CERN is the main client for CERN's antiproton supply system

  12. Final State Interactions in Hadronic WW Decay at LEP

    CERN Document Server

    Dierckxsens, M

    2002-01-01

    An overview is given of the study of final state interactions in hadronically decaying W pairs produced in e^+e^--collisions as it is performed by the four LEP experiments. Bose-Einstein correlations are investigated by comparing like- with unlike-signed pairs of pions and/or using the mixed event analysis technique. Colour reconnection is examined with a method that compares the particle flow distributions in inter-jet regions.

  13. LEP measurements of $V_{cb}$ and $V_{ub}$

    CERN Document Server

    Hawkings, R

    2001-01-01

    The measurements of the magnitudes of the CKM matrix elements V/sub cb/ and V/sub ub/ from LEP are reviewed. V/sub cb/ is measured using the decay B/sup 0/ to D*/sup +/l/sup -/ nu , whilst V/sub ub/ is measured using inclusive charmless semileptonic b decays. Particular attention is paid to the limiting systematic errors in each case. (20 refs).

  14. Measurement of the Tau Lepton Polarisation at LEP2

    CERN Document Server

    Abdallah, J.; Adam, W.; Adzic, P.; Albrecht, T.; Alemany-Fernandez, R.; Allmendinger, T.; Allport, P.P.; Amaldi, U.; Amapane, N.; Amato, Sandra F.; Anashkin, E.; Andreazza, A.; Andringa, S.; Anjos, N.; Antilogus, Pierre; Apel, W-D.; Arnoud, Y.; Ask, S.; Asman, B.; Augustin, Jean-Eudes; Augustinus, A.; Baillon, P.; Ballestrero, A.; Bambade, P.; Barbier, R.; Bardin, D.; Barker, G.J.; Baroncelli, Antonio; Battaglia, M.; Baubillier, M.; Becks, K-H.; Begalli, M.; Behrmann, A.; Ben-Haim, Eli; Benekos, N.; Benvenuti, A.; Berat, C.; Berggren, Mikael; Bertrand, D.; Besancon, M.; Besson, N.; Bloch, D.; Blom, M.; Bluj, Michal; Bonesini, Maurizio; Boonekamp, M.; Booth, P.S.L.; Borisov, G.; Botner, Olga; Bouquet, B.; Bowcock, T.J.V.; Boyko, I.; Bracko, Marko; Brenner, R.; Brodet, E.; Bruckman, P.; Brunet, J.M.; Buschbeck, B.; Buschmann, P.; Calvi, M.; Camporesi, Tiziano; Canale, V.; Carena, F.; Castro, Nuno Filipe; Cavallo, F.; Chapkin, M.; Charpentier, Ph.; Checchia, Paolo; Chierici, R.; Chliapnikov, P.; Chudoba, J.; Chung, Suh-Urk; Cieslik, K.; Collins, P.; Contri, Roberto; Cosme, G.; Cossutti, Fabio; Costa, M.J.; Crennell, D.; Cuevas, J.; D'Hondt, J.; da Silva, T.; Da Silva, W.; Dedovich, D.; Della Ricca, Giuseppe; De Angelis, Alessandro; De Boer, W.; De Clercq, C.; De Lotto, Barbara; De Maria, N.; De Min, A.; de Paula, L.; Di Ciaccio, L.; Di Simone, A.; Doroba, K.; Eigen, G.; Ekelof, Tord; Ellert, Mattias; Elsing, M.; Espirito Santo, Maria Catarina; Fanourakis, George K.; Feindt, Michael; Fernandez, J.; Ferrer, A.; Ferro, F.; Flagmeyer, U.; Foeth, H.; Fokitis, E.; Fulda-Quenzer, F.; Fuster, J.; Gandelman, Miriam; Garcia, C.; Gavillet, Philippe; Gazis, Evangelos; Gomez-Ceballos, G.; Goncalves, P.; Graziani, E.; Grosdidier, G.; Grzelak, K.; Guy, J.; Haag, C.; Hallgren, A.; Hamacher, Klaus; Hamilton, K.; Haug, S.; Hauler, F.; Hedberg, Vincent; Hennecke, M.; Herr, H.; Hoffman, J.; Holmgren, S-O.; Holt, P.J.; Houlden, M.A.; Jackson, John Neil; Jarlskog, Goran; Jarry, P.; Jeans, D.; Johansson, E.K.; Jonsson, P.; Joram, C.; Jungermann, L.; Kapusta, Frederic; Katsanevas, S.; Katsoufis, E.; Kernel, Gabrijel; Kerzel, U.; King, B.T.; Kjaer, N.J.; Kluit, Peter; Kokkinias, P.; Kourkoumelis, C.; Kouznetsov, O.; Krumstein, Z.; Kucharczyk, M.; Lamsa, J.; Leder, G.; Ledroit, F.; Leinonen, L.; Leitner, R.; Lemonne, Jacques; Lepeltier, V.; Lesiak, T.; Liebig, W.; Liko, D.; Lipniacka, A.; Lopes, J.H.; Lopez, J.M.; Loukas, D.; Lutz, Pierre; Lyons, Louis; MacNaughton, J.; Malek, A.; Maltezos, S.; Mandl, F.; Marco, J.; Marco, R.; Marechal, B.; Margoni, M.; Marin, J-C.; Mariotti, C.; Markou, Athanasios; Martinez-Rivero, C.; Masik, J.; Mastroyiannopoulos, N.; Matorras, Francisco; Matteuzzi, C.; Mazzucato, F.; Mazzucato, M.; Nulty, R.Mc; Meroni, C.; Migliore, E.; Mitaroff, Winfried A.; Mjoernmark, U.; Moa, T.; Moch, M.; Monge, R.; Montenegro, J.; Moraes, D.; Moreno, S.; Morettini, P.; Mueller, U.; Muenich, K.; Mulders, M.; Mundim Filho, Luiz Martins; Murray, W.; Muryn, B.; Myatt, G.; Myklebust, T.; Nassiakou, M.; Navarria, F.; Nawrocki, K.; Nicolaidou, R.; Oblakowska-Mucha, A.; Obraztsov, V.; Olshevski, A.; Onofre, A.; Orava, R.; Osterberg, K.; Ouraou, A.; Oyanguren, A.; Paganoni, M.; Paiano, S.; Palacios, J.P.; Palka, Henryk; Papadopoulou, Th.D.; Pape, L.; Parkes, C.; Parodi, F.; Parzefall, U.; Passeri, A.; Passon, O.; Peralta, L.; Perepelitsa, V.; Perrotta, Andrea; Petrolini, Alessandro; Piedra, Jonatan; Pieri, L.; Pierre, Francois; Pimenta, M.; Piotto, E.; Poireau, V.; Pol, M.E.; Polok, G.; Pozdniakov, V.; Pukhaeva, N.; Pullia, A.; Rames, J.; Read, A.; Rebecchi, P.; Rehn, J.; Reid, D.; Reinhardt, R.; Renton, Peter; Richard, F.; Ridky, Jan; Rivero, M.; Rodriguez, D.; Romero, A.; Ronchese, P.; Roudeau, P.; Rovelli, T.; Ruhlmann, Vanina; Ryabtchikov, D.; Sadovsky, A.; Salmi, L.; Salt, J.; Sander, C.; Savoy-Navarro, A.; Schwickerath, U.; Segar, A.; Sekulin, R.; Siebel, Martin; Sisakian, A.; Smadja, G.; Smirnova, O.; Sokolov, A.; Sopczak, A.; Sosnowski, R.; Spassov, T.; Stanitzki, M.; Stocchi, A.; Strauss, J.; Stugu, B.; Szczekowski, M.; Szeptycka, M.; Szumlak, T.; Tabarelli de Fatis, T.; Taffard, A.C.; Tegenfeldt, F.; Timmermans, Jan; Tkatchev, L.; Tobin, M.; Todorovova, S.; Tome, B.; Tonazzo, A.; Tortosa, P.; Travnicek, Petr; Treille, D.; Tristram, G.; Trochimczuk, M.; Troncon, Clara; Turluer, M-L.; Tyapkin, I.A.; Tyapkin, P.; Tzamarias, S.; Uvarov, V.; Valenti, Giovanni; Van Dam, P.; Van Eldik, J.; van Remortel, N.; Van Vulpen, I.; Vegni, G.; Veloso, F.; Venus, W.; Verdier, Patrice; Verzi, V.; Vilanova, D.; Vitale, Lorenzo; Vrba, V.; Wahlen, H.; Washbrook, A.J.; Weiser, C.; Wicke, D.; Wickens, J.; Wilkinson, G.; Winter, M.; Witek, M.; Yushchenko, O.; Zalewska, A.; Zalewski, P.; Zavrtanik, Danilo; Zhuravlov, V.; Zimine, N.I.; Zintchenko, Alexandre

    2008-01-01

    A first measurement of the average polarisation P_tau of tau leptons produced in e+e- annihilation at energies significantly above the Z resonance is presented. The polarisation is determined from the kinematic spectra of tau hadronic decays. The measured value P_tau = -0.164 +/- 0.125 is consistent with the Standard Model prediction for the mean LEP energy of 197 GeV.

  15. Small-x physics at LEP/LHC

    International Nuclear Information System (INIS)

    Bartels, J.; Schuler, G.A.

    1990-12-01

    The small-x behavior of deep inelastic structure functions in QCD is discussed. After a brief review of theoretical ideas we describe numerical estimates which show that LEP/LHC will be extremely useful for distinguishing between 'standard QCD' and 'new' physics in the low-x region. We also discuss which measurements will be useful for unravelling the new features of small-x physics. (orig.)

  16. Large-angle Bhabha scattering at LEP 1

    Science.gov (United States)

    Beenakker, Wim; Passarino, Giampiero

    1998-04-01

    A critical assessment is given of the theoretical uncertainty in the predicted cross-sections for large-angle Bhabha scattering at LEP 1, with or without t-channel subtraction. To this end a detailed comparison is presented of the results obtained with the programs ALIBABA and TOPAZ0. Differences in the implementation of the radiative corrections and the effect of missing higher-order terms are critically discussed. © 1998

  17. Lep vertical tunnel movements - lessons for future colliders

    Energy Technology Data Exchange (ETDEWEB)

    Pitthan, R [CERN-Conseil Europeen pour la recherche nucleaire, Clic-Study Group and the Survey Group, Geneve (Switzerland)

    1999-07-01

    The data from 10 years of vertical surveys verify for all of LEP the previous observation, localized to region P1, that LEP floor movements are predominantly deterministic. This rules out the ATL model as being correct for this tunnel. If generalized, for yearly movements a random ATL model underestimates the possible maximum long-term motions. In contrast, extrapolation of the LEP vertical data to the short-term (hours and days) time-scale shows that the random approach predicts larger short-term movements than the deterministic model. This means that simulations using the ATL hypothesis are overtly pessimistic with regard to the frequency of operational realignments required. Depending on the constants chosen in the models these differences can be large, of the order of a magnitude and more. This paper deals solely with the directly measured months-to-years tunnel motions in rock, and the extrapolation of such ground motions to hourly or daily time-spans It does not, address the important question of the contribution of hourly-scale movements of the accelerator components, which could have a random part, to the combined motion. Nor does it address the question of movements of accelerator tunnels like HERA or TRISTAN which are built in water and debris, and not in solid rock. (author)

  18. Lep vertical tunnel movements - lessons for future colliders

    International Nuclear Information System (INIS)

    Pitthan, R.

    1999-01-01

    The data from 10 years of vertical surveys verify for all of LEP the previous observation, localized to region P1, that LEP floor movements are predominantly deterministic. This rules out the ATL model as being correct for this tunnel. If generalized, for yearly movements a random ATL model underestimates the possible maximum long-term motions. In contrast, extrapolation of the LEP vertical data to the short-term (hours and days) time-scale shows that the random approach predicts larger short-term movements than the deterministic model. This means that simulations using the ATL hypothesis are overtly pessimistic with regard to the frequency of operational realignments required. Depending on the constants chosen in the models these differences can be large, of the order of a magnitude and more. This paper deals solely with the directly measured months-to-years tunnel motions in rock, and the extrapolation of such ground motions to hourly or daily time-spans It does not, address the important question of the contribution of hourly-scale movements of the accelerator components, which could have a random part, to the combined motion. Nor does it address the question of movements of accelerator tunnels like HERA or TRISTAN which are built in water and debris, and not in solid rock. (author)

  19. Global voltage control for the LEP RF system

    International Nuclear Information System (INIS)

    Ciapala, E.; Butterworth, A.; Peschardt, E.

    1993-01-01

    The LEG RF system is installed as independent 16 cavity units. In addition to the eight copper cavity units originally installed 12 units with super-conducting cavities are being added for the LEP200 energy upgrade. The total RF voltage determines the synchrotron tune (Qs) and must be controlled precisely during energy ramping. Local function generators in each of the RF units are pre-loaded such that when triggered simultaneously by ramp timing events transmitted over the general timing system the total voltage varies to give the Qs function required. A disadvantage is that loss of RF in a unit at any time after the loading process cannot be corrected. As the number of RF units increases automatic control of the total RF voltage and its distribution around LEP becomes desirable. A global voltage control system, based on a central VME controller, has recently been installed. It has direct and rapid access to the RF units over the LEP time division multiplexing system. Initial tests on operation and performance at fixed energy and during energy ramping are described, as well as the implementation of a Qs loop in which Qs can be set directly using on-line synchrotron frequency measurements

  20. High accuracy magnetic field mapping of the LEP spectrometer magnet

    CERN Document Server

    Roncarolo, F

    2000-01-01

    The Large Electron Positron accelerator (LEP) is a storage ring which has been operated since 1989 at the European Laboratory for Particle Physics (CERN), located in the Geneva area. It is intended to experimentally verify the Standard Model theory and in particular to detect with high accuracy the mass of the electro-weak force bosons. Electrons and positrons are accelerated inside the LEP ring in opposite directions and forced to collide at four locations, once they reach an energy high enough for the experimental purposes. During head-to-head collisions the leptons loose all their energy and a huge amount of energy is concentrated in a small region. In this condition the energy is quickly converted in other particles which tend to go away from the interaction point. The higher the energy of the leptons before the collisions, the higher the mass of the particles that can escape. At LEP four large experimental detectors are accommodated. All detectors are multi purpose detectors covering a solid angle of alm...

  1. A new LAN concept for LEP machine networks

    CERN Document Server

    Guerrero, L E

    1995-01-01

    LEP networks, implemented in 1987, are based on two Token-ring backbones using TDM as the transmission medium. The general topology is based on routers and on a distributed backbone. To avoid the instabilities introduced by the TDM and all the conversion layers it has been decided to upgrade the LEP machine network and to evaluate a new concept for the overall network topology. The new concept will also fulfil the basic requirements for the future LHC network. The new approach relies on a large infrastructure which connects all the eight underground pits of LEP with single-mode fibres from the Prevessin control room (PCR). From the bottom of the pits, the two adjacent alcoves will be cabled with multi-mode fibres. FDDI has been selected as the MAC protocol. This new concept is based on switching and routing between the PCR and the eight pits. In each pit a hub will switch between the FDDI LMA backbone and the local Ethernet segments. Two of these segments will reach the alcoves by means of a 10Base-F link. In...

  2. Does childhood motor skill proficiency predict adolescent fitness?

    Science.gov (United States)

    Barnett, Lisa M; Van Beurden, Eric; Morgan, Philip J; Brooks, Lyndon O; Beard, John R

    2008-12-01

    To determine whether childhood fundamental motor skill proficiency predicts subsequent adolescent cardiorespiratory fitness. In 2000, children's proficiency in a battery of skills was assessed as part of an elementary school-based intervention. Participants were followed up during 2006/2007 as part of the Physical Activity and Skills Study, and cardiorespiratory fitness was measured using the Multistage Fitness Test. Linear regression was used to examine the relationship between childhood fundamental motor skill proficiency and adolescent cardiorespiratory fitness controlling for gender. Composite object control (kick, catch, throw) and locomotor skill (hop, side gallop, vertical jump) were constructed for analysis. A separate linear regression examined the ability of the sprint run to predict cardiorespiratory fitness. Of the 928 original intervention participants, 481 were in 28 schools, 276 (57%) of whom were assessed. Two hundred and forty-four students (88.4%) completed the fitness test. One hundred and twenty-seven were females (52.1%), 60.1% of whom were in grade 10 and 39.0% were in grade 11. As children, almost all 244 completed each motor assessments, except for the sprint run (n = 154, 55.8%). The mean composite skill score in 2000 was 17.7 (SD 5.1). In 2006/2007, the mean number of laps on the Multistage Fitness Test was 50.5 (SD 24.4). Object control proficiency in childhood, adjusting for gender (P = 0.000), was associated with adolescent cardiorespiratory fitness (P = 0.012), accounting for 26% of fitness variation. Children with good object control skills are more likely to become fit adolescents. Fundamental motor skill development in childhood may be an important component of interventions aiming to promote long-term fitness.

  3. A New Tool for Assessing Mobile Device Proficiency in Older Adults: The Mobile Device Proficiency Questionnaire.

    Science.gov (United States)

    Roque, Nelson A; Boot, Walter R

    2018-02-01

    Mobile device proficiency is increasingly required to participate in society. Unfortunately, there still exists a digital divide between younger and older adults, especially with respect to mobile devices (i.e., tablet computers and smartphones). Training is an important goal to ensure that older adults can reap the benefits of these devices. However, efficient/effective training depends on the ability to gauge current proficiency levels. We developed a new scale to accurately assess the mobile device proficiency of older adults: the Mobile Device Proficiency Questionnaire (MDPQ). We present and validate the MDPQ and a short 16-question version of the MDPQ (MDPQ-16). The MDPQ, its subscales, and the MDPQ-16 were found to be highly reliable and valid measures of mobile device proficiency in a large sample. We conclude that the MDPQ and MDPQ-16 may serve as useful tools for facilitating mobile device training of older adults and measuring mobile device proficiency for research purposes.

  4. End view of steel-concrete prototype yoke for LEP dipoles

    CERN Multimedia

    CERN PhotoLab

    1979-01-01

    The magnetic field needed in the LEP dipole magnets was rather low, of a fraction of tesla. This lead to the conception of a novel yoke structure consisting of stacks of 1.5 mm thick low-carbon steel laminations spaced by 4.1 mm with the spaces filled with concrete. For details see LEP-Note 118,1978 and LEP-Note 233,1980. See also 7908528X, 8111710X, 8111529.

  5. Purification and characterization of Lep d I, a major allergen from the mite Lepidoglyphus destructor.

    Science.gov (United States)

    Ventas, P; Carreira, J; Polo, F

    1992-04-01

    A major allergen of the storage mite Lepidoglyphus destructor (Lep d I) has been purified by affinity chromatography using an anti-Lep d I monoclonal antibody. The purity of the protein obtained by this procedure was assessed by reverse-phase HPLC. Lep d I displayed a molecular weight of 14 kD on SDS-PAGE under non-reducing conditions, and 16 kD in the presence of a reducing agent. Analytical IEF revealed a little charge microheterogeneity, showing three bands with pIs 7.6-7.8. Purified Lep d I retained IgE-binding ability, as proved by immunoblotting experiments after SDS-PAGE and RAST with individual sera from L. destructor-sensitive patients. Results from the latter technique demonstrated that 87% of L. destructor-allergic patients had specific IgE to Lep d I, and a good correlation between IgE reactivity with L. destructor extract and Lep d I was found. In addition, RAST inhibition experiments showed that IgE-binding sites on Lep d I are major L. destructor-allergenic determinants, since Lep d I could inhibit up to 75% the binding of specific IgE to L. destructor extract; on the other hand, Lep d I did not cross-react with D. pteronyssinus allergens.

  6. Developing Adaptive Proficiency in Special Forces Officers

    National Research Council Canada - National Science Library

    White, Susan S; Mueller-Hanson, Rose A; Dorsey, David W; Pulakos, Elaine D; Wisecarver, Michelle M; Deagle, Edwin A., III; Mendini, Kip G

    2005-01-01

    Adaptive proficiency is critical for operating in the dynamic Special Forces (SF) mission environment and a recent focus on this requirement has resulted in a greater emphasis on adaptability in current training for SF...

  7. Self-efficacy and Its Relation to ESL Writing Proficiency and Academic Disciplines

    Directory of Open Access Journals (Sweden)

    Saeid Raoofi

    2017-07-01

    Full Text Available Writing is an essential skill for academic development within any disciplinary area. Despite the rapidly growing body of research on the various aspects of second language writing, research on writing self-efficacy remains scarce. This study investigated the relationship the between writing self-efficacy and writing proficiency in English as a second language. In this cross-sectional study, 304 Malaysian undergraduate students completed a writing self-efficacy questionnaire. The participants’ writing proficiency was assessed using two different writing tasks. The results showed that there was a significant difference in writing self-efficacy among the three writing proficiency groups. It was also found that science students had significantly higher writing self-efficacy than those in social sciences. Limitations of the study and Implications for second language writing instruction are also discussed.

  8. The Effects of First- and Second-Language Proficiency on Conflict Resolution and Goal Maintenance in Bilinguals: Evidence from Reaction Time Distributional Analyses in a Stroop Task

    Science.gov (United States)

    Tse, Chi-Shing; Altarriba, Jeanette

    2012-01-01

    By administering a Stroop task to college-student bilinguals varied in self-rated first- (L1) and second-language (L2) proficiency, the current study examined the effects of L1 and L2 proficiencies on selective attention performance. We conducted ex-Gaussian analyses to capture the modal and positive-tail components of participants' reaction time…

  9. Students’ Perceived Level of English Proficiency in Secondary Schools in Dodoma, Tanzania

    Directory of Open Access Journals (Sweden)

    Lazarus Ndiku Makewa

    2013-07-01

    Full Text Available This paper looked at students’ perceived level of English proficiency among Dodoma secondary schools in Tanzania. Factors like attitude, anxiety, classroom activities, motivation, and learning resources were considered as influencing English learning. The study was guided by three theories: Input Hypothesis, Inter-language and Vygotsky’s theory of value. Correlation design was used to describe the association between the student and teacher-related factors and students’ perceived level of English proficiency. Purposive sampling was used to select 300 form three students. Questionnaires were used to collect data from the participants. Reliability of the research instrument was determined by conducting a pilot study. Pearson Descriptive statistics and Kendall’s Tau-b were used to analyze the data. The study revealed that the students’ perceived level of proficiency in spoken English was average. The findings indicated a significant positive correlation between perceived English proficiency and attitude toward the English language, classroom activities, teacher motivation, and classroom environment. It is suggested that further studies integrate qualitative research methods to the research design in order to get an in-depth understanding of students’ perception on English proficiency.

  10. School-Age Test Proficiency and Special Education After Congenital Heart Disease Surgery in Infancy.

    Science.gov (United States)

    Mulkey, Sarah B; Bai, Shasha; Luo, Chunqiao; Cleavenger, Jordyn E; Gibson, Neal; Holland, Greg; Mosley, Bridget S; Kaiser, Jeffrey R; Bhutta, Adnan T

    2016-11-01

    To evaluate test proficiency and the receipt of special education services in school-age children who had undergone surgery for congenital heart disease (CHD) at age Education longitudinal database containing achievement test scores in literacy and mathematics for grades 3-4 and special education codes. The primary negative outcome was not achieving grade-level proficiency on achievement tests. Logistic regression accounting for repeated measures was used to evaluate for associations between achieving proficiency and demographic data, maternal education, and clinical factors. A total of 362 of 458 (79%) children who underwent surgery for CHD were matched to the Arkansas Department of Education database, 285 of whom had grade 3 and/or 4 achievement tests scores. Fewer students with CHD achieved proficiency in literacy and mathematics (P education predicted proficiency in literacy (P special education services (26.9% vs 11.6%; P special education services than all state students. Results from this study support the need for neurodevelopmental evaluations as standard practice in children with CHD. Copyright © 2016 Elsevier Inc. All rights reserved.

  11. Unique Contributions of Maternal Reading Proficiency to Predicting Children's Preschool Receptive Vocabulary and Reading Proficiency

    Science.gov (United States)

    Phillips, Linda M.; Norris, Stephen P.; Hayward, Denyse V.; Lovell, Meridith A.

    2017-01-01

    This study investigated whether mothers' measured reading proficiency and their educational level predict, over and above each other, their children's receptive vocabulary and reading proficiency when confounding factors of speaking a minority language, ethnicity, number of children in the family, and marital and employment status are controlled.…

  12. Assessment of Preschoolers' Gross Motor Proficiency: Revisiting Bruininks-Oseretsky Test of Motor Proficiency

    Science.gov (United States)

    Lam, Hazel Mei Yung

    2011-01-01

    Literature reveals that there are very few validated motor proficiency tests for young children. According to Gallahue and Ozmun, the Bruininks-Oseretsky Test of Motor Proficiency is a valid test. However, manipulative skills, which are classified as gross motor skills by most motor development specialists, are only tested in the Upper Limb…

  13. The performance of the DELPHI hadron calorimeter at LEP

    International Nuclear Information System (INIS)

    Ajinenko, I.; Beloous, K.; Chudoba, J.

    1996-01-01

    The DELPHI Hadron Calorimeter was conceived more than ten years ago, as an instrument to measure the energy of hadrons and hadronic jets from e + e - collisions at the CERN collider LEP. In addition it was expected to provide a certain degree of discrimination between pions and muons. The detector is a rather simple and relatively inexpensive device consisting of around 20,000 limited streamer plastic tubes, with inductive pad read-out, embedded in the iron yoke of the 1.2 T DELPHI magnet. Its depth is at minimum 6.6 nuclear interaction lengths. The electronics necessary for the pad readout was designed to have an adequate performance for a reasonable cost. This detector has proved over six years of operation to have an entirely satisfactory performance and great reliability; for example less than 1% of the streamer tubes have failed and electronic problems remain at the per mil level. During the past two years an improvement program has been under way. It has been found possible to use the streamer tubes as strips, hence giving better granularity and particle tracking, by reading out the cathode of individual tubes. The constraints on this were considerable because of the inaccessibility of the detectors in the magnet yoke. However, a cheap and feasible solution has been found. The cathode readout leads to an improved energy resolution, better μ identification, a better π/μ separation and to possibilities of neutral particle separation. The simultaneous anode read-out of several planes of the endcaps of the detector will provide a fast trigger in the forward/backward direction which is an important improvement for LEP200. On the barrel the system will provide a cosmic trigger which is very useful for calibration as counting rates at LEP200 will be very low

  14. The impact of threshold language assistance programming on the accessibility of mental health services for persons with limited English proficiency in the Medi-Cal setting.

    Science.gov (United States)

    McClellan, Sean R; Wu, Frances M; Snowden, Lonnie R

    2012-06-01

    Title VI of the 1964 Civil Rights Act prohibits federal funds recipients from providing care to limited English proficiency (LEP) persons more limited in scope or lower in quality than care provided to others. In 1999, the California Department of Mental Health implemented a "threshold language access policy" to meet its Title VI obligations. Under this policy, Medi-Cal agencies must provide language assistance programming in a non-English language where a county's Medical population contains either 3000 residents or 5% speakers of that language. We examine the impact of threshold language policy-required language assistance programming on LEP persons' access to mental health services by analyzing the county-level penetration rate of services for Russian, Spanish, and Vietnamese speakers across 34 California counties, over 10 years of quarterly data. Exploiting a time series with nonequivalent control group study design, we studied this phenomena using linear regression with random county effects to account for trends over time. Threshold language policy-required assistance programming led to an immediate and significant increase in the penetration rate of mental health services for Russian (8.2, P language speaking persons. Threshold language assistance programming was effective in increasing mental health access for Russian and Vietnamese, but not for Spanish-speaking LEP persons.

  15. Incremental Validity of Multidimensional Proficiency Scores from Diagnostic Classification Models: An Illustration for Elementary School Mathematics

    Science.gov (United States)

    Kunina-Habenicht, Olga; Rupp, André A.; Wilhelm, Oliver

    2017-01-01

    Diagnostic classification models (DCMs) hold great potential for applications in summative and formative assessment by providing discrete multivariate proficiency scores that yield statistically driven classifications of students. Using data from a newly developed diagnostic arithmetic assessment that was administered to 2032 fourth-grade students…

  16. Examining the Effects of Gender and Second Language Proficiency on Hispanic Writers' Persuasive Discourse.

    Science.gov (United States)

    Bermudez, Andrea B.; Prater, Doris L.

    1994-01-01

    Examines the use of persuasive responses by Hispanic second-language writers and categorizes these responses by level of language proficiency and gender. Findings indicate that students exit English-as-a-Second-Language classes without having achieved a higher level of expertise in the use of persuasive discourse and that females elaborate more…

  17. A Study of Interactions among Ambiguity Tolerance, Classroom Work Styles, and English Proficiency

    Science.gov (United States)

    Chiang, Hui-Hua

    2016-01-01

    This article presents a preliminary investigation of the inter-relationships between English learners' tolerance for ambiguity, their classroom work styles, and their level of English proficiency. The study population comprised 46 English as a foreign language (EFL) students attending a technical college in Taiwan. The findings indicated that a…

  18. Oral proficiency teaching with WebCEF and Skype : Scenarios for online production and interaction tasks

    NARCIS (Netherlands)

    Jager, S.; Meima, Estelle; Oggel, Gerdientje

    2012-01-01

    This article reports our findings on using WebCEF as a CEFR familiarization and self-assessment tool for oral proficiency. Furthermore, we outline how we have implemented Skype as a tool for telecollaboration in our language programmes. The primary purpose of our study was to explore how students

  19. Captioned Instructional Video: Effects on Content Comprehension, Vocabulary Acquisition and Language Proficiency

    Science.gov (United States)

    BavaHarji, Madhubala; Alavi, Zhinoos Kamal; Letchumanan, Krishnaveni

    2014-01-01

    This experimental design study examined the effects of viewing captioned instructional videos on EFL learners' content comprehension, vocabulary acquisition and language proficiency. It also examined the participants' perception of viewing the captioned instructional videos. The 92 EFL students in two classes, who were undertaking the "Tape…

  20. The Correlation between Learner Autonomy and English Proficiency of Indonesian EFL College Learners

    Science.gov (United States)

    Myartawan, I. Putu Ngurah Wage; Latief, Mohammad Adnan; Suharmanto

    2013-01-01

    The present study aimed to investigate the correlation between learner autonomy psychologically defined in the study as a composite of behavioral intentions to do autonomous learning and self-efficacy in relation to autonomous learning, and English proficiency. The sample comprised 120 first semester English-majored students of a state university…

  1. Oral Proficiency Teaching with WebCERF and Skype: Scenarios for Online Production and Interaction Tasks

    Science.gov (United States)

    Jager, Sake; Meima, Estelle; Oggel, Gerdientje

    2013-01-01

    This article reports our findings on using WebCEF as a CEFR familiarization and self-assessment tool for oral proficiency. Furthermore, we outline how we have implemented Skype as a tool for telecollaboration in our language programmes. The primary purpose of our study was to explore how students and teachers would perceive the potential benefits…

  2. Roles of Position, Stress, and Proficiency in L2 Children's Spelling: A Developmental Perspective

    Science.gov (United States)

    Hong, Su Chin; Chen, Shu Hui

    2011-01-01

    This study investigated the roles of phoneme position, stress, and proficiency in L2 spelling development by Taiwanese students learning English as a Foreign Language (EFL), an alphabetic writing system typologically different from the learners' L1 logographic system. Structured nonword spelling tests were administered to EFL sixth-graders with…

  3. Predictive Validity of Curriculum-Based Measures for English Learners at Varying English Proficiency Levels

    Science.gov (United States)

    Kim, Jennifer Sun; Vanderwood, Michael L.; Lee, Catherine Y.

    2016-01-01

    This study examined the predictive validity of curriculum-based measures in reading for Spanish-speaking English learners (ELs) at various levels of English proficiency. Third-grade Spanish-speaking EL students were screened during the fall using DIBELS Oral Reading Fluency (DORF) and Daze. Predictive validity was examined in relation to spring…

  4. Procedures and reasoning for skill proficiency testing in physical education teacher education programs

    Directory of Open Access Journals (Sweden)

    Timothy Baghurst

    2015-12-01

    Full Text Available This study sought to determine how the testing of skill proficiency is being conducted in physical education teacher education (PETE programs in the USA and how fitness or skill proficiencies, as attributes of a physical educator, are perceived. Participants were 312 college PETE program coordinators who completed an online survey about skill testing in their program. The eligible respondents yielded a 52.7% total response rate. Most participants believed that skill proficiency for PETE students was important, but only 46% of programs reported testing within their program. Many participants stated it was possible for their students to graduate without demonstrating proficiency in skill technique, yet were confident their students would pass an independent skill test. Only 46.2% of respondents indicated their students needed to demonstrate proper skill technique in order to graduate, and there was no consistent method of assessment. Responses were evenly split regarding the importance of a physical educator being able to demonstrate proper skill technique or be physically fit. The lack of skill testing in programs, combined with the variation in assessment, is concerning, and the development of a standardized skill-based test may provide more rigor to this important area of teacher credibility and effectiveness.

  5. Another Look at Correlations between the Oral Proficiency Interview and the Zertifikat Deutsch als Fremdsprache.

    Science.gov (United States)

    Vazulik, Johannes; Brown, Cheri

    A study supplementing earlier research by Lalande and Schweckendiek investigated comparisons and correlations obtained from testing a group of 17 university students of German using both the American Council on the Teaching of Foreign Languages (ACTFL) Oral Proficiency Interview (OPI) and the most recent revision of the examination for the…

  6. Inclusive $D*^{+-}$ Production in Two-Photon Collisions at LEP

    CERN Document Server

    Achard, P.; Aguilar-Benitez, M.; Alcaraz, J.; Alemanni, G.; Allaby, J.; Aloisio, A.; Alviggi, M.G.; Anderhub, H.; Andreev, Valery P.; Anselmo, F.; Arefev, A.; Azemoon, T.; Aziz, T.; Bagnaia, P.; Bajo, A.; Baksay, G.; Baksay, L.; Baldew, S.V.; Banerjee, S.; Banerjee, Sw.; Barczyk, A.; Barillere, R.; Bartalini, P.; Basile, M.; Batalova, N.; Battiston, R.; Bay, A.; Becattini, F.; Becker, U.; Behner, F.; Bellucci, L.; Berbeco, R.; Berdugo, J.; Berges, P.; Bertucci, B.; Betev, B.L.; Biasini, M.; Biglietti, M.; Biland, A.; Blaising, J.J.; Blyth, S.C.; Bobbink, G.J.; Bohm, A.; Boldizsar, L.; Borgia, B.; Bottai, S.; Bourilkov, D.; Bourquin, M.; Braccini, S.; Branson, J.G.; Brochu, F.; Burger, J.D.; Burger, W.J.; Cai, X.D.; Capell, M.; Cara Romeo, G.; Carlino, G.; Cartacci, A.; Casaus, J.; Cavallari, F.; Cavallo, N.; Cecchi, C.; Cerrada, M.; Chamizo, M.; Chang, Y.H.; Chemarin, M.; Chen, A.; Chen, G.; Chen, G.M.; Chen, H.F.; Chen, H.S.; Chiefari, G.; Cifarelli, L.; Cindolo, F.; Clare, I.; Clare, R.; Coignet, G.; Colino, N.; Costantini, S.; de la Cruz, B.; Cucciarelli, S.; van Dalen, J.A.; de Asmundis, R.; Deglon, P.; Debreczeni, J.; Degre, A.; Deiters, K.; della Volpe, D.; Delmeire, E.; Denes, P.; DeNotaristefani, F.; De Salvo, A.; Diemoz, M.; Dierckxsens, M.; Dionisi, C.; Dittmar, M.; Doria, A.; Dova, M.T.; Duchesneau, D.; Echenard, B.; Eline, A.; El Mamouni, H.; Engler, A.; Eppling, F.J.; Ewers, A.; Extermann, P.; Falagan, M.A.; Falciano, S.; Favara, A.; Fay, J.; Fedin, O.; Felcini, M.; Ferguson, T.; Fesefeldt, H.; Fiandrini, E.; Field, J.H.; Filthaut, F.; Fisher, P.H.; Fisher, W.; Fisk, I.; Forconi, G.; Freudenreich, K.; Furetta, C.; Galaktionov, Iouri; Ganguli, S.N.; Garcia-Abia, Pablo; Gataullin, M.; Gentile, S.; Giagu, S.; Gong, Z.F.; Grenier, Gerald Jean; Grimm, O.; Gruenewald, M.W.; Guida, M.; van Gulik, R.; Gupta, V.K.; Gurtu, A.; Gutay, L.J.; Haas, D.; Hakobyan, R.S.; Hatzifotiadou, D.; Hebbeker, T.; Herve, Alain; Hirschfelder, J.; Hofer, H.; Hohlmann, M.; Holzner, G.; Hou, S.R.; Hu, Y.; Jin, B.N.; Jones, Lawrence W.; de Jong, P.; Josa-Mutuberria, I.; Kafer, D.; Kaur, M.; Kienzle-Focacci, M.N.; Kim, J.K.; Kirkby, Jasper; Kittel, W.; Klimentov, A.; Konig, A.C.; Kopal, M.; Koutsenko, V.; Kraber, M.; Kraemer, R.W.; Krenz, W.; Kruger, A.; Kunin, A.; Ladron de Guevara, P.; Laktineh, I.; Landi, G.; Lebeau, M.; Lebedev, A.; Lebrun, P.; Lecomte, P.; Lecoq, P.; Le Coultre, P.; Le Goff, J.M.; Leiste, R.; Levtchenko, M.; Levtchenko, P.; Li, C.; Likhoded, S.; Lin, C.H.; Lin, W.T.; Linde, F.L.; Lista, L.; Liu, Z.A.; Lohmann, W.; Longo, E.; Lu, Y.S.; Lubelsmeyer, K.; Luci, C.; Luminari, L.; Lustermann, W.; Ma, W.G.; Malgeri, L.; Malinin, A.; Mana, C.; Mangeol, D.; Mans, J.; Martin, J.P.; Marzano, F.; Mazumdar, K.; McNeil, R.R.; Mele, S.; Merola, L.; Meschini, M.; Metzger, W.J.; Mihul, A.; Milcent, H.; Mirabelli, G.; Mnich, J.; Mohanty, G.B.; Muanza, G.S.; Muijs, A.J.M.; Musicar, B.; Musy, M.; Nagy, S.; Natale, S.; Napolitano, M.; Nessi-Tedaldi, F.; Newman, H.; Niessen, T.; Nisati, A.; Kluge, Hannelies; Ofierzynski, R.; Organtini, G.; Palomares, C.; Pandoulas, D.; Paolucci, P.; Paramatti, R.; Passaleva, G.; Patricelli, S.; Paul, Thomas Cantzon; Pauluzzi, M.; Paus, C.; Pauss, F.; Pedace, M.; Pensotti, S.; Perret-Gallix, D.; Petersen, B.; Piccolo, D.; Pierella, F.; Pioppi, M.; Piroue, P.A.; Pistolesi, E.; Plyaskin, V.; Pohl, M.; Pojidaev, V.; Pothier, J.; Prokofev, D.O.; Prokofiev, D.; Quartieri, J.; Rahal-Callot, G.; Rahaman, M.A.; Raics, P.; Raja, N.; Ramelli, R.; Rancoita, P.G.; Ranieri, R.; Raspereza, A.; Razis, P.; Ren, D.; Rescigno, M.; Reucroft, S.; Riemann, S.; Riles, Keith; Roe, B.P.; Romero, L.; Rosca, A.; Rosier-Lees, S.; Roth, Stefan; Rosenbleck, C.; Roux, B.; Rubio, J.A.; Ruggiero, G.; Rykaczewski, H.; Sakharov, A.; Saremi, S.; Sarkar, S.; Salicio, J.; Sanchez, E.; Sanders, M.P.; Schafer, C.; Schegelsky, V.; Schmidt-Kaerst, S.; Schmitz, D.; Schopper, H.; Schotanus, D.J.; Schwering, G.; Sciacca, C.; Servoli, L.; Shevchenko, S.; Shivarov, N.; Shoutko, V.; Shumilov, E.; Shvorob, A.; Siedenburg, T.; Son, D.; Spillantini, P.; Steuer, M.; Stickland, D.P.; Stoyanov, B.; Straessner, A.; Sudhakar, K.; Sultanov, G.; Sun, L.Z.; Sushkov, S.; Suter, H.; Swain, J.D.; Szillasi, Z.; Tang, X.W.; Tarjan, P.; Tauscher, L.; Taylor, L.; Tellili, B.; Teyssier, D.; Timmermans, Charles; Ting, Samuel C.C.; Ting, S.M.; Tonwar, S.C.; Toth, J.; Tully, C.; Tung, K.L.; Ulbricht, J.; Valente, E.; Van de Walle, R.T.; Veszpremi, V.; Vesztergombi, G.; Vetlitsky, I.; Vicinanza, D.; Viertel, G.; Villa, S.; Vivargent, M.; Vlachos, S.; Vodopianov, I.; Vogel, H.; Vogt, H.; Vorobev, I.; Vorobyov, A.A.; Wadhwa, M.; Wallraff, W.; Wang, X.L.; Wang, Z.M.; Weber, M.; Wienemann, P.; Wilkens, H.; Wynhoff, S.; Xia, L.; Xu, Z.Z.; Yamamoto, J.; Yang, B.Z.; Yang, C.G.; Yang, H.J.; Yang, M.; Yeh, S.C.; Zalite, A.; Zalite, Yu.; Zhang, Z.P.; Zhao, J.; Zhu, G.Y.; Zhu, R.Y.; Zhuang, H.L.; Zichichi, A.; Zilizi, G.; Zimmermann, B.; Zoller, M.

    2002-01-01

    Inclusive D^{*+-} production in two-photon collisions is studied with the L3 detector at LEP, using 683 pb^{-1} of data collected at centre-of-mass energies from 183 to 208 GeV. Differential cross sections are determined as functions of the transverse momentum and pseudorapidity of the D^{*+-} mesons in the kinematic region 1 GeV e^+e^-D^{*+-}X)$ in this kinematical region is measured and the sigma(e^+e^- ---> e^+e^- cc{bar}X) cross section is derived. The measurements are compared with next-to-leading order perturbative QCD calculations.

  7. Multiphoton production and tests of QED at LEP-II

    International Nuclear Information System (INIS)

    Winter, M.

    2001-01-01

    Data collected by the 4 LEP collaboration from 1995 to 2000 at collision energies ranging from 130 to 208 GeV were used to measure the cross-section of the process e + e - →γγ(γ). QED predictions for this reaction were tested with a few per-cent accuracy and manifestations of physics beyond the Standard Model (SM) were investigated. Preliminary lower bounds on the cut-off parameter Λ ± , the mass of an excited electron, the string mass scale underlying low-scale Quantum Gravity and on energy scales expression various contact interactions were derived. (author)

  8. Inclusive Charm Production in Two-Photon Collisions at LEP

    CERN Document Server

    Acciarri, M; Adriani, O; Aguilar-Benítez, M; Alcaraz, J; Alemanni, G; Allaby, James V; Aloisio, A; Alviggi, M G; Ambrosi, G; Anderhub, H; Andreev, V P; Angelescu, T; Anselmo, F; Arefev, A; Azemoon, T; Aziz, T; Bagnaia, P; Baksay, L; Balandras, A; Ball, R C; Banerjee, S; Banerjee, Sw; Banicz, K; Barczyk, A; Barillère, R; Barone, L; Bartalini, P; Basile, M; Battiston, R; Bay, A; Becattini, F; Becker, U; Behner, F; Berdugo, J; Berges, P; Bertucci, B; Betev, B L; Bhattacharya, S; Biasini, M; Biland, A; Blaising, J J; Blyth, S C; Bobbink, Gerjan J; Böck, R K; Böhm, A; Boldizsar, L; Borgia, B; Bourilkov, D; Bourquin, Maurice; Braccini, S; Branson, J G; Brigljevic, V; Brochu, F; Buffini, A; Buijs, A; Burger, J D; Burger, W J; Busenitz, J K; Button, A M; Cai, X D; Campanelli, M; Capell, M; Cara Romeo, G; Carlino, G; Cartacci, A M; Casaus, J; Castellini, G; Cavallari, F; Cavallo, N; Cecchi, C; Cerrada-Canales, M; Cesaroni, F; Chamizo-Llatas, M; Chang, Y H; Chaturvedi, U K; Chemarin, M; Chen, A; Chen, G; Chen, G M; Chen, H F; Chen, H S; Chéreau, X J; Chiefari, G; Cifarelli, Luisa; Cindolo, F; Civinini, C; Clare, I; Clare, R; Coignet, G; Colijn, A P; Colino, N; Costantini, S; Cotorobai, F; de la Cruz, B; Csilling, Akos; Dai, T S; van Dalen, J A; D'Alessandro, R; De Asmundis, R; Déglon, P L; Degré, A; Deiters, K; Della Volpe, D; Denes, P; De Notaristefani, F; De Salvo, A; Diemoz, M; Van Dierendonck, D N; Di Lodovico, F; Dionisi, C; Dittmar, Michael; Dominguez, A; Doria, A; Dova, M T; Duchesneau, D; Dufournaud, D; Duinker, P; Durán, I; El-Mamouni, H; Engler, A; Eppling, F J; Erné, F C; Extermann, Pierre; Fabre, M; Faccini, R; Falagán, M A; Falciano, S; Favara, A; Fay, J; Fedin, O; Felcini, Marta; Ferguson, T; Ferroni, F; Fesefeldt, H S; Fiandrini, E; Field, J H; Filthaut, Frank; Fisher, P H; Fisk, I; Forconi, G; Fredj, L; Freudenreich, Klaus; Furetta, C; Galaktionov, Yu; Ganguli, S N; García-Abia, P; Gataullin, M; Gau, S S; Gentile, S; Gheordanescu, N; Giagu, S; Goldfarb, S; Gong, Z F; Grünewald, M W; van Gulik, R; Gupta, V K; Gurtu, A; Gutay, L J; Haas, D; Hartmann, B; Hasan, A; Hatzifotiadou, D; Hebbeker, T; Hervé, A; Hidas, P; Hirschfelder, J; Hofer, H; Holzner, G; Hoorani, H; Hou, S R; Iashvili, I; Jin, B N; Jones, L W; de Jong, P; Josa-Mutuberria, I; Khan, R A; Kamrad, D; Kapustinsky, J S; Kaur, M; Kienzle-Focacci, M N; Kim, D; Kim, D H; Kim, J K; Kim, S C; Kinnison, W W; Kirkby, Jasper; Kiss, D; Kittel, E W; Klimentov, A; König, A C; Kopp, A; Korolko, I; Koutsenko, V F; Krämer, R W; Krenz, W; Kunin, A; Lacentre, P E; Ladrón de Guevara, P; Laktineh, I; Landi, G; Lapoint, C; Lassila-Perini, K M; Laurikainen, P; Lavorato, A; Lebeau, M; Lebedev, A; Lebrun, P; Lecomte, P; Lecoq, P; Le Coultre, P; Lee, H J; Le Goff, J M; Leiste, R; Leonardi, E; Levchenko, P M; Li Chuan; Lin, C H; Lin, W T; Linde, Frank L; Lista, L; Liu, Z A; Lohmann, W; Longo, E; Lü, Y S; Lübelsmeyer, K; Luci, C; Luckey, D; Luminari, L; Lustermann, W; Ma Wen Gan; Maity, M; Majumder, G; Malgeri, L; Malinin, A; Maña, C; Mangeol, D J J; Marchesini, P A; Marian, G; Martin, J P; Marzano, F; Massaro, G G G; Mazumdar, K; McNeil, R R; Mele, S; Merola, L; Meschini, M; Metzger, W J; Von der Mey, M; Migani, D; Mihul, A; Milcent, H; Mirabelli, G; Mnich, J; Molnár, P; Monteleoni, B; Moulik, T; Muanza, G S; Muheim, F; Muijs, A J M; Nahn, S; Napolitano, M; Nessi-Tedaldi, F; Newman, H; Niessen, T; Nippe, A; Nisati, A; Nowak, H; Oh, Yu D; Organtini, G; Ostonen, R; Palomares, C; Pandoulas, D; Paoletti, S; Paolucci, P; Park, H K; Park, I H; Pascale, G; Passaleva, G; Patricelli, S; Paul, T; Pauluzzi, M; Paus, C; Pauss, Felicitas; Peach, D; Pedace, M; Pei, Y J; Pensotti, S; Perret-Gallix, D; Petersen, B; Petrak, S; Piccolo, D; Pieri, M; Piroué, P A; Pistolesi, E; Plyaskin, V; Pohl, M; Pozhidaev, V; Postema, H; Pothier, J; Produit, N; Prokofev, D; Prokofiev, D O; Quartieri, J; Rahal-Callot, G; Raja, N; Rancoita, P G; Raven, G; Razis, P A; Ren, D; Rescigno, M; Reucroft, S; Van Rhee, T; Riemann, S; Riles, K; Robohm, A; Rodin, J; Roe, B P; Romero, L; Rosier-Lees, S; Roth, S; Rubio, Juan Antonio; Ruschmeier, D; Rykaczewski, H; Sakar, S; Salicio, J; Sánchez, E; Sanders, M P; Sarakinos, M E; Schäfer, C; Shchegelskii, V; Schmidt-Kärst, S; Schmitz, D; Scholz, N; Schopper, Herwig Franz; Schotanus, D J; Schwenke, J; Schwering, G; Sciacca, C; Sciarrino, D; Servoli, L; Shevchenko, S; Shivarov, N; Shoutko, V; Shukla, J; Shumilov, E; Shvorob, A V; Siedenburg, T; Son, D; Smith, B; Spillantini, P; Steuer, M; Stickland, D P; Stone, A; Stone, H; Stoyanov, B; Strässner, A; Sudhakar, K; Sultanov, G G; Sun, L Z; Suter, H; Swain, J D; Szillási, Z; Tang, X W; Tauscher, Ludwig; Taylor, L; Timmermans, C; Ting, Samuel C C; Ting, S M; Tonwar, S C; Tóth, J; Tully, C; Tung, K L; Uchida, Y; Ulbricht, J; Valente, E; Vesztergombi, G; Vetlitskii, I; Viertel, Gert M; Villa, S; Vivargent, M; Vlachos, S; Vogel, H; Vogt, H; Vorobev, I; Vorobyov, A A; Vorvolakos, A; Wadhwa, M; Wallraff, W; Wang, J C; Wang, X L; Wang, Z M; Weber, A; Wilkens, H; Wu, S X; Wynhoff, S; Xia, L; Xu, Z Z; Yang, B Z; Yang, C G; Yang, H J; Yang, M; Ye, J B; Yeh, S C; You, J M; Zalite, A; Zalite, Yu; Zemp, P; Zeng, Y; Zhang, Z P; Zhu, G Y; Zhu, R Y; Zichichi, Antonino; Ziegler, F; Zilizi, G

    2000-01-01

    The cross section of charm production in $\\mathrm{\\gamma \\gamma}$ collisions $\\mathrm{\\sigma (e^+e^- \\rightarrow e^+e^-c\\bar{c} X)}$ is measured at LEP with the L3 detector at centre of mass energies from 91 GeV to 183 GeV. Charmed hadrons are identified by electrons and muons from semi-leptonic decays. The direct process $\\mathrm{\\gamma \\gamma \\rightarrow c \\bar{c}}$ is found to be insufficient to describe the data. The measured cross section values and event distributions require contributions from resolved processes, which are sensitive to the gluon density in the photon.

  9. Rock samples from LEP/LHC tunnel excavation

    CERN Multimedia

    1985-01-01

    Rock samples taken from 0 to 170 m below ground on the CERN site when the LEP (Large Electron Positron collider) pit number 6 was drilled in Bois-chatton (Versonnex). The challenges of LHC civil engineering: A mosaic of works, structures and workers of differents crafts and origins. Three consulting consortia for the engineering and the follow-up of the works. Four industrial consortia for doing the job. A young team of 25 CERN staff, 30 surface buildings, 32 caverns of all sizes, 170 000 m3 of concrete, 420 000 m3 excavated. 1998-2004 : six years of work and 340 millions Swiss Francs.

  10. Status and future plans for the LEP accelerator

    International Nuclear Information System (INIS)

    Placidi, M.

    1992-01-01

    An overview is given of the LEP performance in 1991 as compared to the goals defined in the design phase and the targets agreed with the physics experiments during the year. Achievements and limitations in the machine operation for physics in terms of beam current and luminosity are discussed and analyzed. Progress in beam polarization studies leading to improved energy calibration by the resonant depolarization technique are described. Finally, prospects and future plans to increase luminosity, to upgrade the energy and to implement polarization control are presented. (author)

  11. Review of weak mixing angle results at SLC and LEP

    International Nuclear Information System (INIS)

    Woods, M.

    1995-10-01

    In this paper, the authors review recent precise measurements of the weak mixing angle by the SLD experiment at SLC and by the ALEPH, DELPHI, L3, and OPAL experiments at LEP. If they assume that the Minimal Standard Model provides a complete description of the quark and lepton couplings to the Z boson, they find sin 2 θ W eff = 0.23143 ± 0.00028. If this assumption is relaxed to apply to lepton couplings only, they find sin 2 θ W eff = 0.23106 ± 0.00035. They compare these results with other precision electroweak tests

  12. The control system for the LEP beam dump

    International Nuclear Information System (INIS)

    Carlier, E.; Aimar, A.; Bretin, J.L.; Marchand, A.; Mertens, V.; Verhagen, H.

    1994-01-01

    A beam abort system has been developed and installed in LEP to allow the controlled disposal of the stored beam energy. In view of the importance of the system for the protection of the experiments and the machine, and the technical problems in a pulsed high-power environment, special care has been taken to arrive at a clean functional separation between the different elements of the control electronics, using optical transmission of information. All interlocks have been implemented in hardware. The slow controls and the monitoring tasks have been realized in the framework of a modular software tool kit. ((orig.))

  13. The message architecture of the LEP control system

    International Nuclear Information System (INIS)

    Altaber, J.; van der Stok, P.; Frammery, V.; Gareyte, C.; Rausch, R.

    1985-01-01

    The LEP control system will be constructed as a global communication system where microprocessors will be used everywhere, from the management of the communication mechanisms, the execution of complex control procedures, and the supervision of the equipment. To achieve this, the global control problem has been cut into sizeable functions which will be encapsulated into microprocessor modules containing enough hardware for the function to be mostly self-contained. This leads to a function architecture where messages are exchanged between the functions on miscellaneous media. It is shown how these message exchanges can be organized into a uniform flow of data all through the system

  14. Radiological impact of the future CERN program (LEP)

    International Nuclear Information System (INIS)

    Goebel, K.

    1982-01-01

    The author discusses the radiation problems which are the radiological influences of LEP which interest the majority of the members of the personnel. The first studies done in this domain are achieved, and the results are published this summer, among others the doses of radiation and of radioactivity and equally the concentration of hoxions gases on the exterior of the enclosure of future installations. The results are the object of discussions and are compared with the norms of radioprotection and with the actual situation in this region. (orig.)

  15. Charmed-hadron fragmentation functions from CERN LEP1 revisted

    International Nuclear Information System (INIS)

    Kniehl, B.A.; Kramer, G.

    2006-07-01

    In Phys. Rev. D 58, 014014 (1998) and 71, 094013 (2005), we determined non-perturbative D 0 , D + , D *+ , D s + , and Λ c + fragmentation functions, both at leading and next-to-leading order in the MS factorization scheme, by fitting e + e - data taken by the OPAL Collaboration at CERN LEP1. The starting points for the evolution in the factorization scale μ were taken to be μ 0 -2m Q , where Q = c, b. For the reader's convenience, in this Addendum, we repeat this analysis for μ 0 =m Q , where the flavor thresholds of modern sets of parton density functions are located. (Orig.)

  16. Transporting the last superconducting module to be removed from LEP

    CERN Multimedia

    Patrice Loïez

    2001-01-01

    All 72 of LEP's superconducting modules have now been raised to the surface. Some 80% will be preserved at CERN, with 10% being reused for the LHC and a further 10% of obsolete non-radioactive material destined for recycling. These pictures show the last of these modules on its journey from PM18 to the old ISR tunnel where the modules will be stored in the short term. Photo 01: The Ansaldo 1020 module leaves PM18 by lorry. Photo 03: The module on the SM18 site. Photos 06, 08: The module on the road.

  17. Final Results on Heavy Quarks at LEP and SLD

    CERN Document Server

    Stocchi, A

    2002-01-01

    In the last decade, the LEP and SLD experiments played a central role in the study of B hadrons (hadrons containing a b quark). New B hadrons have been observed ($B^0_s$, \\Lambda_b$, $\\Xi_b$ and $B^{**}$) and their production and decay properties have been measured. In this paper we will focus on measurements of the CKM matrix elements: $|V_{cb}|$, $|V_{ub}|$, $|V_{td}|$ and $|V_{ts}|$. We will show how all these measurements, together with theoretical developments, have significantly improved our knowledge on the flavour sector of the Standard Model.

  18. Measurement of the W boson mass at LEP

    CERN Document Server

    D'Hondt, J

    2003-01-01

    The mass of the W boson has been measured by all LEP experiment by the method of diret reonstrution in the WW deay hannels where at least one W boson deays hadronially. This preision measurement is inuened by many systemati unertainties whih were extensively studied. One example is the possible eet of Colour Reonnetion between the deay produts from dierent W bosons in fully hadroni WW nal states. These proeedings overview the preliminary results onerning the W mass measurement and the ongoing measurements of the Colour Reonnetion eet.

  19. Hard photons in W pair production at LEP 2

    International Nuclear Information System (INIS)

    Oldenborgh, G.J. van

    1996-01-01

    The properties of hard photon radiation in W pair production at LEP 2 are studied, with emphasis on the energy loss relevant to the W mass measurement. We use a combination of the exact one-photon matrix element and leading logarithmic structure functions. Defining unobservable, observable and initial-state photons in the phase space, it is shown that neither the one-photon matrix element nor the leading logarithmic structure functions alone give an adequate description of the energy loss due to observable or initial-state photons. An event generator based on these calculations is available. (orig.)

  20. Production of new particles in e+e- reactions at LEP I energies

    International Nuclear Information System (INIS)

    Dobado, A.

    1987-01-01

    The possibility of lep I of producing new particles is considered. We arrive at the general conclusion that lep I may make it possible to complete the detection of the particles that make up the ''standard model'' and, in addition, to discover some supersymmetric particle or to rule out most of the supersymmetric models. (author)