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1

Proceedings of the XXVI SLAC Summer Institute on Particle Physics: Gravity from the Hubble Length to the Planck Length  

SciTech Connect

The XXVI SLAC Summer Institute on Particle Physics was held from August 3 to August 14, 1998. The topic, ''Gravity--from the Hubble Length to the Planck Length,'' brought together 179 physicists from 13 countries. The lectures in this volume cover the seven-day school portion of the Institute, which took us from the largest scales of the cosmos, to the Planck length at which gravity might be unified with the other forces of nature. Lectures by Robert Wagoner, Clifford Will, and Lynn Cominsky explored the embedding of gravity into general relativity and the confrontation of this idea with experiments in the laboratory and astrophysical settings. Avishai Deckel discussed observations and implications of the large-scale structure of the universe, and Tony Tyson presented the gravitational lensing effect and its use in the ongoing search for signatures of the unseen matter of the cosmos. The hunt for the wave nature of gravity was presented by Sam Finn and Peter Saulson, and Joe Polchinski showed us what gravity might look like in the quantum limit at the Planck scale. The lectures were followed by afternoon discussion sessions, where students could further pursue questions and topics with the day's lecturers. The Institute concluded with a three-day topical conference covering recent developments in theory and experiment from around the world of elementary particle physics and cosmology; its proceedings are also presented in this volume.

Deporcel, Lilian

2001-04-02

2

MATE Summer Institutes and Workshops  

NSDL National Science Digital Library

The Marine Advanced Technology Education Center (MATE) hosts workshops and institutes each summer. The events are intended as professional development activities for college, high school and university faculty. The goals of the summer institutes are to: 1. Create an awareness of ocean activities related to marine research, exploration, and industry; 2. Highlight career opportunities associated with these activities; 3. Promote the teaching of higher-level technical, problem-solving, critical thinking, communication, and teamwork skills; and 4. Provide opportunities for educators to interact with employers- and vice versa.

2011-09-20

3

2006 Summer Transportation Institute Final Report.  

National Technical Information Service (NTIS)

The Department of Civil Engineering at the Missouri University of Science & Technology hosted its seventh U.S. Department of Transportation Summer Transportation Institute (STI). The Mission of the institute's program is as follows: To contribute to the d...

A. B. Rolufs

2008-01-01

4

2007 Summer Transportation Institute Final Report.  

National Technical Information Service (NTIS)

The Missouri LTAP at the Missouri University of Science and Technology hosted in eighth U.S. Department of Transportation Summer Transportation Institute (STI). The mission of the institute's program is as follows: To contribute to the development of a di...

H. Pickerill

2008-01-01

5

Summer Institute for Faculty Development. Final Report.  

ERIC Educational Resources Information Center

|The Southern Institute for Faculty Development, created by The Division of Continuing Education at Southern Oregon State College (SOSC), fosters the professional development of mid-career faculty teaching lower-division transfer courses at Oregon's 16 community colleges. An intensive summer residential curriculum and faculty enhancement program,…

Talbert, Kevin

6

Summer Spectacular: Children's Literature Workshops, Institutes, and Classes  

ERIC Educational Resources Information Center

No matter how long teachers have been out of school, or how many children's literature classes they have taught, when summer comes, most of them long to "go back to class." It is because of the intriguing, exciting, reinvigorating institutes and conferences their colleagues offer in summer. In this interview, two veteran planners of summer

Huff, Karen; Pavonetti, Linda; Roser, Nancy

2012-01-01

7

An Innovative Summer Institute for Teachers: Examining the Underground Railroad  

ERIC Educational Resources Information Center

In this article, the author describes the summer institute which she planned through her involvement with the Institute for Freedom Studies at Northern Kentucky University, whose purpose is to promote interdisciplinary research, teaching and community outreach grounded in the study of the Underground Railroad. The purpose of the institute was to…

Dallmer, Denise

2002-01-01

8

An Earth Science Summer Institute for Elementary Teachers.  

ERIC Educational Resources Information Center

|Introduces the Earth Science Summer Institute for elementary teachers, a program of professional development in content and inquiry. Focuses on concepts and learning demonstrating the interconnectedness of earth science topics. (Author/YDS)|

Levitt, Karen E.; Manner, Barbara M.

2001-01-01

9

45 CFR 2400.51 - Summer Institute accreditation.  

Code of Federal Regulations, 2012 CFR

...2400.51 Public Welfare Regulations Relating to Public Welfare (Continued) JAMES MADISON MEMORIAL FELLOWSHIP FOUNDATION FELLOWSHIP PROGRAM REQUIREMENTS Graduate Study § 2400.51 Summer Institute accreditation. The...

2012-10-01

10

45 CFR 2400.49 - Contents of the Summer Institute.  

Code of Federal Regulations, 2012 CFR

...2400.49 Public Welfare Regulations Relating to Public Welfare (Continued) JAMES MADISON MEMORIAL FELLOWSHIP FOUNDATION FELLOWSHIP PROGRAM REQUIREMENTS Graduate Study § 2400.49 Contents of the Summer Institute. The...

2012-10-01

11

Design for Learning; 1967 Summer Institute of Technology for Children.  

ERIC Educational Resources Information Center

This book is a description of a summer institute of the Technology for Children Project which was designed to help teachers combine technological activities with regular academic lessons for children in grades K-6. Included are: (1) the three institute goals which were to orient elementary classroom teachers, to develop guidelines for…

Helen L. Beeler School, Marlton, NJ.

12

Institute for Support Personnel. Garland Junior College, EPDA 1969 Summer Institute.  

ERIC Educational Resources Information Center

For four and one-half weeks in June and July 1969, Garland Junior College operated the intensive summer phase of a one-year training institute for 68 teachers, teacher aides, and trainers of classroom personnel. Under the authority of the Education Professions Development Act, the institute was comprised of the full-time summer portion and…

Garland Junior Coll., Boston, MA.

13

Aspen Global Change Institute Summer Science Sessions  

SciTech Connect

The Aspen Global Change Institute (AGCI) successfully organized and convened six interdisciplinary meetings over the course of award NNG04GA21G. The topics of the meetings were consistent with a range of issues, goals and objectives as described within the NASA Earth Science Enterprise Strategic Plan and more broadly by the US Global Change Research Program/Our Changing Planet, the more recent Climate Change Program Strategic Plan and the NSF Pathways report. The meetings were chaired by two or more leaders from within the disciplinary focus of each session. 222 scholars for a total of 1097 participants-days were convened under the auspices of this award. The overall goal of each AGCI session is to further the understanding of Earth system science and global environmental change through interdisciplinary dialog. The format and structure of the meetings allows for presentation by each participant, in-depth discussion by the whole group, and smaller working group and synthesis activities. The size of the group is important in terms of the group dynamics and interaction, and the ability for each participant's work to be adequately presented and discussed within the duration of the meeting, while still allowing time for synthesis

Katzenberger, John; Kaye, Jack A

2006-10-01

14

Summer institute in fluid mechanics of the environment  

Microsoft Academic Search

Summer Institute in Fluid Mechanics of the Environment will be offered from June 12 through August 4, 1972, at Colorado State University, Fort Collins, Colorado, under support of the National Science Foundation. J.E. Cermak, Professor-in-Charge of the Fluid Mechanics Program, will direct the Institute with the assistance of R.N. Meroney. The subject matter will he focused on the description, analysis,

Anonymous

1972-01-01

15

Literacies for All Summer Institute: The Whole Language Umbrella Conference.  

ERIC Educational Resources Information Center

|Explains the Literacies for All Summer Institute which incorporates research perspectives, innovative classroom practices, and opportunities for interaction among participants. Interviews the keynote speakers for the conference: poet, author, and teacher David Bouchard and literary researcher Randy Bomer. Discusses writing inspiration,…

Albers, Peggy

2003-01-01

16

Summer Institute in Biomedical Engineering for College Teachers  

ERIC Educational Resources Information Center

|Discusses the objectives, curricula, and accomplishments of an interdisciplinary summer institute designed to prepare college teachers qualified in both the life sciences and engineering. Indicates that joint educational programs between engineering, science, and medical faculties are completely feasible if each group is interested in the other…

Cleaver, T. G.; And Others

1973-01-01

17

Summer Research Institute Interfacial and Condensed Phase Chemical Physics  

SciTech Connect

Pacific Northwest National Laboratory (PNNL) hosted its first annual Summer Research Institute in Interfacial and Condensed Phase Chemical Physics from May through September 2004. During this period, fourteen PNNL scientists hosted sixteen young scientists from eleven different universities. Of the sixteen participants, fourteen were graduate students; one was transitioning to graduate school; and one was a university faculty member.

Barlow, Stephan E.

2004-10-01

18

PULSE Ultrafast X-ray Summer School  

Microsoft Academic Search

The Third Annual Ultrafast X-ray Summer School (UXSS 2009) was held from June 15–19, 2009, at the SLAC National Accelerator Laboratory (SLAC) and sponsored by the PULSE Institute for Ultrafast Energy Science. The summer school was a weeklong residential event that brought together about 100 students, post-doctoral researchers, and other young and established scientists from diverse backgrounds. Particular emphasis was

David Reis

2009-01-01

19

Understanding Emergent Readers and Writers. Custom Edition for the Ohio Summer Institute for Reading Intervention, Summer 2001.  

ERIC Educational Resources Information Center

This book, a custom edition for the Ohio Summer Institute for Reading Intervention (Summer 2001), reprints selected chapters from two books, "Literacy Development in the Early Years: Helping Children Read and Write," Fourth Edition (Lesley Mandel Morrow) and "Literacy's Beginnings: Supporting Young Readers and Writers," Third Edition (Lea M. McGee…

Morrow, Lesley Mandel; McGee, Lea M.; Richgels, Donald J.

20

76 FR 6172 - Bureau of Educational and Cultural Affairs (ECA) Request for Grant Proposals: Summer Institutes...  

Federal Register 2010, 2011, 2012, 2013

...services relevant to the particular theme. Institute Themes (a) The Summer Institute on Environmental Stewardship should use experiential learning techniques to expose participants to current themes in studies of the environment, including natural resource...

2011-02-03

21

Summer Internship Program at the Monterey Bay Aquarium Research Institute  

NASA Astrophysics Data System (ADS)

The Monterey Bay Aquarium Research Institute formally started the Internship Program in 1997. The program is open to undergraduate and graduate students and educators. The purpose of the Program is to provide an opportunity for talented students and teachers to come to MBARI for a certain period of time and to work on a research project under MBARI staff supervision. The interns are selected following a rigorous application procedure, merit review and, in some cases, an interview process. They are from around the world and represent a variety of different backgrounds, experience, and education. They all share a common desire to learn more about the marine environment and to work with MBARI staff. The mission of the Monterey Bay Aquarium Research Institute is to serve as a world center for advanced research and education in ocean science and technology. MBARI strives to achieve this mission through the development of better instruments, systems, and methods for scientific research in the deep ocean. MBARI emphasizes peer relationships between engineers and scientists as a basic principle of its operation. Teams at MBARI use cutting-edge technology to develop equipment, software, and research methods to meet the specific needs of deep-sea research. The focus of the MBARI internship is on the intern’s professional development—learning research techniques and improving communication and collaboration skills. Each intern has an MBARI mentor who will supervise a specific project. Interns will also serve as peer-mentors to other interns. This presentation will provide a brief overview of the history of the program as well as lessons learned. 2009 MBARI SUMMER INTERNS WITH PRESIDENT AND CEO MARCIA MCNUTT

Matsumoto, G. I.

2009-12-01

22

PlantIT Summer Institute July 12, 2010 Resources  

NSDL National Science Digital Library

This summer project focuses on using investigative cases for high school students. A wide variety of online resources, tools, and data are shared as high school teachers explore the myriad roles of cotton in human culture.

Ethel D. Stanley (Beloit College;Biology); Toni Lafferty (C. H. Yoe High School;Biology)

2010-07-12

23

The Summer Institute for Writing Center Directors and Professionals: A Narrative Bibliography  

ERIC Educational Resources Information Center

Since 2003, the International Writing Centers Association has held a Summer Institute for Writing Center Directors and Professionals. Encouragement of scholarship, writing, and publication are important aspects of the institute. We have compiled a bibliography of scholarly works emerging from the first seven institutes. These works include web…

Babcock, Rebecca; Ferrel, Thomas; Ozias, Moira

2011-01-01

24

Summer Institutes for Secondary Teachers of Science, Mathematics and Social Science. 1972 Directory.  

ERIC Educational Resources Information Center

|This directory lists the institutions awarded support by the National Science Foundation for 276 summer institutes in 1972 for secondary school teachers of science and/or mathematics. The introduction gives information on "unitary" and "sequential" institutes, eligibility and selection of participants, applications, and information concerning…

National Science Foundation, Washington, DC.

25

2006 Annual Report Summer Research Institute Interfacial and Condensed Phase Chemical Physics.  

National Technical Information Service (NTIS)

The Pacific Northwest National Laboratory (PNNL) hosted its third annual Summer Research Institute in Interfacial and Condensed Phase Chemical Physics from May through September 2006. During this period, twenty PNNL scientists hosted twenty-seven scientis...

N. H. Avery S. E. Barlow

2006-01-01

26

Bioengineering and Bioinformatics Summer Institutes: Meeting Modern Challenges in Undergraduate Summer Research  

ERIC Educational Resources Information Center

|Summer undergraduate research programs in science and engineering facilitate research progress for faculty and provide a close-ended research experience for students, which can prepare them for careers in industry, medicine, and academia. However, ensuring these outcomes is a challenge when the students arrive ill-prepared for substantive…

Butler, Peter J.; Dong, Cheng; Snyder, Alan J.; Jones, A. Daniel; Sheets, Erin D.

2008-01-01

27

Working towards New Understandings and Practices: A Summer Institute on Gifted Education.  

ERIC Educational Resources Information Center

|Describes a three-week, six credit, summer institute in New Brunswick designed to expose preservice teachers to the evolving understandings of giftedness and gifted learners. A survey of 25 participants indicates the institute was most successful in changing teachers awareness of giftedness and recognizing gifted learners' needs. (CR)|

Sullenger, Karen; Cashion, Marie; Ball, Marilyn

1997-01-01

28

Arrival: Notes from the 2005 "Views on Understanding" Summer Institute, Harvard University Project Zero Research Center  

ERIC Educational Resources Information Center

|Of all the summer institutes for educators, the Harvard University Project Zero Research Center's "Views on Understanding" institute stands out as one of the few offering extensive exchanges amongst researchers and practitioners from all over the world. "Arrival" captures the experience of one participant while capturing the essences of plenary…

Fluellen, Jerry E., Jr.

2005-01-01

29

Work in progress — introducing engineering to middle-school students during a Green summer institute  

Microsoft Academic Search

This work-in-progress paper describes the math and engineering module of the Go Green Institute at Binghamton University. This institute is a 10-day summer program for middle school students and was developed in an effort to increase the level of understanding of the scientific aspects of environmental sustainability and to promote interest in science, technology, engineering, and math careers. The Go

Koenraad Gieskes; Daniel Brennan; Andy Cavagnetto; Susannah Gal; Wayne Jones; Roy McGrann; T. OrBrien

2010-01-01

30

Grouping Lessons We Learned from Co-Teaching in a Summer Writing Institute  

ERIC Educational Resources Information Center

This article describes lessons learned about grouping by teachers and teacher educators who worked collaboratively to design and deliver a summer writing institute for a heterogeneous population of students about to begin ninth grade at an urban high school. Institute staff used co-teaching (Cook & Friend, 1995) extensively to provide support for…

Chandler-Olcott, Kelly; Burnash, Jodi; Donahue, Danielle; DeChick, Maureen; Gendron, Michele; Smith, James; Taylor, Mary; Zeleznik, John

2012-01-01

31

School Nurse Summer Institute: A Model for Professional Development  

ERIC Educational Resources Information Center

|The components of a professional development model designed to empower school nurses to become leaders in school health services is described. The model was implemented during a 3-day professional development institute that included clinical and leadership components, especially coalition building, with two follow-up sessions in the fall and…

Neighbors, Marianne; Barta, Kathleen

2004-01-01

32

An Evaluation of a Summer Reading Institute, 1968.  

ERIC Educational Resources Information Center

|This document describes part of the evaluation of a six-week reading institute for 69 K-3 teachers from the Raymond School, Model School Division (MSD), Washington, D.C. and thereby provides an evaluation model for schools to use in their own inservice training programs. Two evaluation instruments developed by an MSD innovation team in…

Rosenfeld, Michael

33

Fuzzy Cognitive Maps, Web-based Instruction, and Technology Integration. A Report on AECT 2000 Summer Leadership Institute.  

ERIC Educational Resources Information Center

Reports on the Association for Educational Technology (AECT) Summer Leadership Institute (Montreal, Canada, July 2000). The Institute opened with icebreaker activities. Then the results of last year's summer institute were reviewed. Participants re-acted to the fuzzy cognitive map that was generated last year. AECT and its future, Web-based…

Driscoll, Marcy

2000-01-01

34

Summer institute in parallel programming (Organized by Ewing Lusk and William Gropp)  

SciTech Connect

On September 3--13, 1991, Argonne National Laboratory hosted a Summer Institute in Parallel Programming. The institute was organized by the Mathematics and Computer Science Division and was supported in part by the National Science Foundation and by the US Department of Energy. The objective of the institute was to familiarize graduate students and postdoctoral researchers with new methods and tools for parallel programming and to provide hands-on experience with a diverse array of advanced-computer architectures. This report summarizes the activities that took place during the ten-day institute.

Pieper, G.W.

1992-01-01

35

Financial Management and Job Social Skills Training Components in a Summer Business Institute  

ERIC Educational Resources Information Center

Ninety-two adolescents, predominantly ethnic minority high school students, participated in a structured Summer Business Institute (SBI). Participating youth were randomly assigned to receive either job social skills or financial management skills training components. Students who additionally received the job social skills training component were…

Donohue, Brad; Conway, Debbie; Beisecker, Monica; Murphy, Heather; Farley, Alisha; Waite, Melissa; Gugino, Kristin; Knatz, Danielle; Lopez-Frank, Carolina; Burns, Jack; Madison, Suzanne; Shorty, Carrie

2005-01-01

36

2005 Annual Report Summer Research Institute Interfacial and Condensed Phase Chemical Physics  

SciTech Connect

The Pacific Northwest National Laboratory (PNNL) hosted its second annual Summer Research Institute in Interfacial and Condensed Phase Chemical Physics from May through September 2005. During this period, sixteen PNNL scientists hosted fourteen young scientists from eleven different universities. Of the fourteen participants, twelve were graduate students; one was a postdoctoral fellow; and one was a university faculty member.

Barlow, Stephan E.

2005-11-15

37

Evaluation of the Nursing Program at Caldwell Community College and Technical Institute--Summer, 1983.  

ERIC Educational Resources Information Center

|In summer 1983, an evaluation of the nursing program at Caldwell Community College and Technical Institute was conducted to determine whether program objectives were being met, to measure program success, and to identify areas needing improvement. Surveys were sent to 19 early (pre-1978) and 47 recent Licensed Practical Nurse (LPN) graduates; 17…

Pipes, V. David

38

2005 Annual Report Summer Research Institute Interfacial and Condensed Phase Chemical Physics  

Microsoft Academic Search

The Pacific Northwest National Laboratory (PNNL) hosted its second annual Summer Research Institute in Interfacial and Condensed Phase Chemical Physics from May through September 2005. During this period, sixteen PNNL scientists hosted fourteen young scientists from eleven different universities. Of the fourteen participants, twelve were graduate students; one was a postdoctoral fellow; and one was a university faculty member.

Barlow; Stephan E

2005-01-01

39

2007 Annual Report Summer Research Institute Interfacial and Condensed Phase Chemical Physics  

Microsoft Academic Search

The Pacific Northwest National Laboratory (PNNL) hosted its fourth annual Summer Research Institute in Interfacial and Condensed Phase Chemical Physics from April through September 2007. During this time, 21 PNNL scientists hosted 23 participants from 20 different universities. Of the 23 participants, 20 were graduate students, 1 was a postdoctoral fellow, and 2 were university faculty members. This report covers

Beck; Kenneth M

2007-01-01

40

Work Papers of the Summer Institute of Linguistics, University of North Dakota Session. Volume 40.  

ERIC Educational Resources Information Center

|Research by the staff and advanced students of the North Dakota Summer Institute of Linguistics is presented. In "Verb Agreement and Case Marking in Burushaski" (Stephen R. Willson), an overview of Burushaski morphology and syntax is presented, with special attention to verb agreement and case marking. "A Backwards Binding Construction in…

Marlett, Stephen A., Ed.; Speck, Charles H., Ed.

41

Personal Writing and Basics: Reflections from a Writing Project Summer Institute.  

ERIC Educational Resources Information Center

Considers how the Meadow Brook Writing Project's summer institute provides a fertile field for reflection because it involves experienced and successful teachers in a process of critical review of what works and what does not, and how to bring about change. Discusses the power of personal writing. Considers teachers of old and young, and teachers…

Sudol, Ron

2003-01-01

42

Bibliography of the Summer Institute of Linguistics, Australian Aborigines and Islanders Branch. Up to December 1988.  

ERIC Educational Resources Information Center

This bibliography is primarily a listing of works by current or former members of the Summer Institute of Linguistics, Australian Aborigines and Islanders Branch (SIL-AAIB), but also lists works by non SIL-AAIB members that are included in publications edited and/or published by the organization. Unpublished works are not included, with the…

Poole, Alison, Comp.

43

Work Papers of the Summer Institute of Linguistics, 1992. University of North Dakota Session, Volume 36.  

ERIC Educational Resources Information Center

Four working papers from the 1992 Summer Institute of Linguistics, University of North Dakota session, are presented. The first, "English Borrowing in Thai as Reflected in Thai Journalistic Texts," by James Kapper, looks at patterns of the influence of the English language on Thai. It is concluded that English has permeated Thai culture and…

Dooley, Robert A., Ed.; Marshall, David F., Ed.

44

The Characteristics of a Community of Practice in a National Writing Project Invitational Summer Institute  

ERIC Educational Resources Information Center

|This qualitative naturalistic descriptive case study provides an understanding of the characteristics of a community of practice within a National Writing Project invitational summer institute. This study utilized naturalistic, descriptive case study methodology to answer the research question: What characteristics of a community of practice are…

Pearce, Terisa Ronette

2010-01-01

45

Personal Writing and Basics: Reflections from a Writing Project Summer Institute.  

ERIC Educational Resources Information Center

|Considers how the Meadow Brook Writing Project's summer institute provides a fertile field for reflection because it involves experienced and successful teachers in a process of critical review of what works and what does not, and how to bring about change. Discusses the power of personal writing. Considers teachers of old and young, and teachers…

Sudol, Ron

2003-01-01

46

Implementing inquiry: Effects of the Summer Institute in Physics on curriculum and instruction  

NASA Astrophysics Data System (ADS)

Six middle and high school science teachers who had participated in one or more Summer Institutes in Physics at the University of Washington and said they were implementing inquiry-oriented instruction in their classrooms were studied so their instructional practices could be profiled. Classroom observations, interviews, and teacher-used materials provided data for the six case studies. Each teacher's instructional practices were observed for two topics: one that teachers had studied in depth during the Summer Institute, and another topic that they had not studied at the Institute. Teaching behaviors were compared to the Teaching Standards from the National Science Education Standards (1996, NRC) and to instructional practices modeled in the Summer Institute in Physics. Inferences were made concerning each teacher's pedagogical content knowledge based on teaching behaviors observed. Criteria for judging whether the inquiry teaching processes used were similar to that modeled in the Summer Institute included: Using pre-tests or other means of assessing initial student understanding of the topic; choosing curriculum that allowed students to work in groups on topics; starting with activities in which students could make direct observations and, if possible, manipulation of the phenomenon and emphasized the processes of science. Elements of the teacher's role that were profiled included: acting as a guide or facilitator rather than a dispenser of knowledge, guiding principally through the use of questions; interacting with small groups rather than the whole class; and using assessment techniques, both oral and written, that required students to explain their reasoning and justify their answers using their own data or observations. All of the teachers used worksheets minimally adapted from Physics by Inquiry (1996, McDermott) for instruction in the topic they had studied in the Summer Institute, and all had adopted the practice of oral "check-outs" modeled by staff during the institute. Teachers varied widely in implementation of other inquiry teaching techniques, with the high school teachers following the model from the Summer Institute more closely than the middle school teachers.

Chastain, Patricia Louise

47

Riding the knowledge translation roundabout: lessons learned from the Canadian Institutes of Health Research Summer Institute in knowledge translation  

PubMed Central

Background Funding the education and training of the next generation of health researchers is a key mandate of the Canadian Institutes of Health Research (CIHR) knowledge translation (KT) portfolio. The field of KT is growing daily; thus, the training and development of a new generation of KT researchers is essential. Methods Using curriculum documents, participant evaluations, and self-reflection, this paper describes a unique Summer Institute hosted by the CIHR in Cornwall, Ontario, Canada. We outline the key aspects of a successful training initiative that could inform organizations and agencies worldwide with an interest in or who have a mandate for KT. Results This work provides potential funders, faculty, and students with an inside look into the purpose, process, and outcomes of such training initiatives. Conclusion National and international KT organizations, research institutions, and funding agencies are encouraged to consider replicating the training model employed here, as investment into KT personnel will foster the advancement of the field within and beyond local borders. 'To the individual who devotes his/her life to science, nothing can give more happiness than when the results immediately find practical application. There are not two sciences. There is science and the application of science, and these two are linked as the fruit is to the tree.' – Louis Pasteur, 1871 (from presentation by Ian Graham, 2008 CIHR Knowledge Translation Summer Institute)

Kho, Michelle E; Estey, Elizabeth A; DeForge, Ryan T; Mak, Leanne; Bell, Brandi L

2009-01-01

48

2006 Annual Report Summer Research Institute Interfacial and Condensed Phase Chemical Physics  

Microsoft Academic Search

The Pacific Northwest National Laboratory (PNNL) hosted its third annual Summer Research Institute in Interfacial and Condensed Phase Chemical Physics from May through September 2006. During this period, twenty PNNL scientists hosted twenty-seven scientists from twenty-five different universities. Of the twenty-seven participants, one was a graduating senior; twenty-one were graduate students; one was a postdoctoral fellow; and four were university

Nikki B. Avery; Stephan E. Barlow

2006-01-01

49

2006 Annual Report Summer Research Institute Interfacial and Condensed Phase Chemical Physics  

SciTech Connect

The Pacific Northwest National Laboratory (PNNL) hosted its third annual Summer Research Institute in Interfacial and Condensed Phase Chemical Physics from May through September 2006. During this period, twenty PNNL scientists hosted twenty-seven scientists from twenty-five different universities. Of the twenty-seven participants, one was a graduating senior; twenty-one were graduate students; one was a postdoctoral fellow; and four were university faculty members.

Avery, Nikki B.; Barlow, Stephan E.

2006-11-10

50

2007 Annual Report Summer Research Institute Interfacial and Condensed Phase Chemical Physics  

SciTech Connect

The Pacific Northwest National Laboratory (PNNL) hosted its fourth annual Summer Research Institute in Interfacial and Condensed Phase Chemical Physics from April through September 2007. During this time, 21 PNNL scientists hosted 23 participants from 20 different universities. Of the 23 participants, 20 were graduate students, 1 was a postdoctoral fellow, and 2 were university faculty members. This report covers the essense of the program and the research the participants performed.

Beck, Kenneth M.

2007-10-31

51

The Summer Undergraduate Research Internship Program at the Pisgah Astronomical Research Institute  

NASA Astrophysics Data System (ADS)

Pisgah Astronomical Research Institute (PARI) offers summer undergraduate research internships. PARI has received support for the internships from the NC Space Grant Consortium, NSF awards for public science education, private donations, private foundations, and through a collaboration with the Pisgah Astronomical Research and Education Center of the University of North Carolina - Asheville. The internship program began in 2001 with 4 students. This year 7 funded students participated in 2011. Mentors for the interns include PARI's Science, Education, and Information Technology Directors and visiting faculty who are members of the PARI Research Affiliate Faculty program. Students work with mentors on radio and optical astronomy research, electrical engineering for robotic control of instruments, software development for instrument control and software for citizen science projects, and science education by developing curricula and multimedia and teaching high school students in summer programs at PARI. At the end of the summer interns write a paper about their research which is published in the PARI Summer Student Proceedings. Several of the students have presented their results at AAS Meetings. We will present a summary of specific research conducted by the students with their mentors, the logistics for hosting the PARI undergraduate internship program, and plans for growth based on the impact of an NSF supported renovation to the Research Building on the PARI campus.

Cline, J. Donald; Castelaz, M.; Whitworth, C.; Clavier, D.; Owen, L.; Barker, T.

2012-01-01

52

The Summer Undergraduate Research Internship Program at the Pisgah Astronomical Research Institute  

NASA Astrophysics Data System (ADS)

Pisgah Astronomical Research Institute (PARI) offers summer undergraduate research internships. PARI has received support for the internships from the NC Space Grant Consortium, NSF awards for public science education, private donations, private foundations, and through a collaboration with the Pisgah Astronomical Research and Education Center of the University of North Carolina - Asheville. The internship program began in 2001 with 4 students. This year 9 funded students participated in 2010. Mentors for the interns include PARI's Directors of Science, Education, and Information Technology and visiting faculty who are members of the PARI Research Affiliate Faculty program. Students work with mentors on radio and optical astronomy research, electrical engineering for robotic control of instruments, software development for instrument control and applets for citizen science projects, and science education by developing curricula and multimedia and teaching high school students in summer programs at PARI. At the end of the summer interns write a paper about their research which is published in the PARI Summer Student Proceedings. Several of the students have presented their results at AAS Meetings. We will present a summary of specific research conducted by the students with their mentors, the logistics for hosting the PARI undergraduate internship program, and plans for growth based on the impact of an NSF supported renovation to the Research Building on the PARI campus.

Castelaz, Michael W.; Cline, J.; Whitworth, C.; Clavier, D.

2011-01-01

53

The Summer Nuclear Engineering Institute at The University of Texas at Austin  

NASA Astrophysics Data System (ADS)

The Summer Nuclear Engineering Institute (SNEI) at the University of Texas is a four week course that provides an opportunity for undergraduates to experience the field of nuclear engineering. This experience is especially important if you are a sophomore or junior and are not majoring in nuclear engineering as an undergrad, but would like to explore what nuclear engineering is like. Students will study fundamental nuclear engineering concepts, gain hands-on experience at UT's research reactor and receive six transferrable college credits. The SNEI program was first held in July of 2009, and will be held once again in the summer of 2010; it is funded by the U.S. Nuclear Regulatory Commission Nuclear Education Grant Program which covers housing, meal plan, a travel and textbook allowance and a 1000 stipend.

Olvera, Juan

2009-10-01

54

Evaluation of the Appalachian Regional Commission Oak Ridge National Laboratory Summer Institute for Math/Science/Technology  

ERIC Educational Resources Information Center

This report describes some of the key immediate and long-term outcomes achieved by the Appalachian Regional Commission (ARC)-Oak Ridge National Laboratory (ORNL) Summer Institute for Math/Science/Technology for student and teacher participants. This two-week summer program provides high school students and teachers from the Appalachian region the…

Simkin, Linda S.; Futch, Valerie

2006-01-01

55

Recommendation for funding the 1992 Global Change Summer Institute: Industrial ecology and global change  

SciTech Connect

A summer institute on Industrial Ecology and Global Change was held at Snow Mass, Colorado, July 20--31, 1992. Topics of discussion included the following: the patterns and prospects of global industrialization; the vulnerability of the global environment to human activity; how industrial activity might be reconfigured in response to a deeper understanding of the major biogeochemical cycles in which this activity is embedded; how industrial activity might be reconfigured in response to a deeper understanding of associated exotic disturbances of the environment; interactions of human activity with basic environmental cycles; human activity in the form of exotic disturbance of the environment; and the dynamics of industrial development and the environmental implications.

Fein, J.S.

1992-12-31

56

1992 Environmental Summer Science Camp Program evaluation. The International Environmental Institute of Westinghouse Hanford Company  

SciTech Connect

This report describes the 1992 Westinghouse Hanford Company/US Department of Energy Environmental Summer Science Camp. The objective of the ``camp`` was to motivate sixth and seventh graders to pursue studies in math, science, and the environment. This objective was accomplished through hands-on fun activities while studying the present and future challenges facing our environment. The camp was funded through Technical Task Plan, 424203, from the US Department of Energy-Headquarters, Office of Environmental Restoration and Waste Management, Technology Development,to Westinghouse Hanford Company`s International Environmental Institute, Education and Internship Performance Group.

Not Available

1993-07-01

57

Energy, environment, and policy choices: Summer institutes for science and social studies educators  

SciTech Connect

The Center for Energy Education (CEE) is a partnership linking the University of Oklahoma, Close Up Foundation and Department of Energy. Based upon the theme of energy, environment and public policy, the CEE`s main purposes are to: (1) educate teachers on energy sources, environmental issues and decisionmaking choices regarding public policy; (2) develop interdisciplinary curricula that are interactive in nature (see attachments); (3) disseminate energy education curricula; (4) serve as a resource center for a wide variety of energy education materials; (5) provide a national support system for teachers in energy education; and (6) conduct research in energy education. The CEE conducted its first two-week experimentially-based program for educators during the summer of 1993. Beginning at the University of Oklahoma, 57 teachers from across the country examined concepts and issues related to energy and environment, and how the interdependence of energy and environment significantly influences daily life. During the second week of the institute, participants went to Washington, D.C. to examine the processes used by government officials to make critical decisions involving interrelationships among energy, environment and public policy. Similar institutes were conducted during the summers of 1994 and 1995 resulting in nearly 160 science and social studies educators who had participated in the CEE programs. Collectively the participants represented 36 states, the Pacific Territories, Puerto Rico, and Japan.

Marek, E.A.; Chiodo, J.J.; Gerber, B.L.

1997-06-01

58

NATIONAL PROGRAM DEVELOPMENT INSTITUTES IN TECHNICAL EDUCATION, SUMMER 1967, A COMPILATION OF SELECTED PRESENTATIONS AND INSTRUCTIONAL MATERIALS. LEADERSHIP 16.  

ERIC Educational Resources Information Center

SELECTED MATERIALS GENERATED BY THE FOUR 1967 SUMMER LEADERSHIP DEVELOPMENT INSTITUTES IN TECHNICAL EDUCATION ARE PRESENTED. THE MATERIALS WERE COMPILED TO FULFILL A NEED FOR ADDITIONAL INSTRUCTIONAL MATERIALSTO BE USED IN CONDUCTING FUTURE STATE AND LOCALLY SPONSORED TRAINING ACTIVITIES AND INSTITUTES. COMMISSIONED PAPERS ARE--"A DESIGN FOR THE…

MILLER, A.J.; VALENTINE, I.E.

59

The University of Wyoming Early Childhood Summer Institute: A Model for Professional Development that Leads to Changes in Practice  

Microsoft Academic Search

One of the greatest challenges we face as an early childhood professional community is providing short-term, affordable professional development that results in depth of understanding and change of practice. The University of Wyoming Early Childhood Summer Institute is a model for professional development that fosters reflection, inquiry, and change in beliefs and practice for early childhood practitioners. The 3-day Institute

Michelle L. Buchanan; Michael Morgan; Margaret Cooney; Mitch Gerharter

2006-01-01

60

SLAC site design aesthetics  

SciTech Connect

Stanford Linear Accelerator Center (SLAC) is a single mission Laboratory dedicated to basic research in high energy particle physics. SLAC site also houses Stanford Synchrotron Radiation Laboratory (SSRL) which is a multi-mission laboratory for research using beams of ultraviolet light and low energy photons as emitted tangentially from SLAC colliding beam facilities. This paper discusses various aspects of SLAC site design aesthetics under the following headings: imposed footprint of SLAC; description of selected site; use of earth cover for radiation and sight screens; use of landscaping for cosmetic purposes; use of exterior paint colors to soften SLAC impact on neighbors; relocation of SLAC main entrance; relocation of SLAC collider arcs and experimental hall; parking lots and storage yards; and land use zoning at SLAC.

Hall, F.F.

1985-01-01

61

SLAC site design aesthetics  

SciTech Connect

Stanford Linear Accelerator Center (SLAC) is a single mission laboratory dedicated to basic research in high energy particle physics. SLAC site also houses Stanford Synchrotron Radiation Laboratory (SSRL) which is a multi-mission laboratory for research using beams of ultraviolet light and low energy photons as emitted tangentially from SLAC colliding beam facilities. This paper discusses various aspects of SLAC site design aesthetics under the following headings: (1) imposed footprint of SLAC, (2) description of selected site, (3) use of earth cover for radiation and sight screens, (4) use of landscaping for cosmetic purposes, (5) use of exterior paint colors to soften SLAC impact on neighbors, (6) relocation of SLAC main entrance, (7) relocation of SLAC collider arcs and experimental hall, (8) parking lots and storage yards, and (9) land use zoning at SLAC.

Hall, F.F.

1985-10-01

62

Lumberjack Summer Camp: A Cross-Institutional Undergraduate Research Experience in Computer Science  

Microsoft Academic Search

This paper describes our experiences in leading Lumberjack Summer Camp, a ten-week undergraduate research experience in compiler-based optimization techniques for functional programs, held during the summer of 2000. Like many undergraduate research experiences, Lumberjack Summer Camp was designed to provide an opportunity for students and faculty to work closely together toward a common research goal. But Lumberjack Summer Camp was

Patricia Johann; Franklyn A. Turbak

2001-01-01

63

FCCSET/CEHR summer institutes for teacher development in science, mathematics, and technology. Final report  

SciTech Connect

This report summarizes the profiling procedure that grantees used to carry out a formative evaluation of their summer institutes. It discusses programmatic issues identified through profiling as well as how well the profiling process worked for the grantees. The report contains recommendations on both programmatic issues and profiling for NSTC/DOE, NCISE (the technical assistance provider), and the grantees themselves. In early September NCISE held its second workshop for NSTC grantees. Data from the evaluation of this two-day event generated six recommendations for DOE and the technical assistance provider. This NCISE report summarizes the two-year process NCISE used in attempting to help the grantees establish some indicators of success. A number of indicators were identified the first year with others added the second year. Additionally, a compilation of the various measures for the indicators of success developed collaboratively by NCISE and grantees is included. Although these indicators are not mandatory, they do provide guides for grantees in assessing the impact of the institutes. Embedded in the report are several recommendations for NSTC/DOE and the technical assistance provider.

NONE

1997-05-01

64

Si, Se Puede = Yes, It Can Be Done: The Summer Scholars Transfer Institute Collaborating to Promote Access and Achievement.  

ERIC Educational Resources Information Center

|This booklet, issued by the Summer Scholars Transfer Institute (SSTI), encourages collaboration in promoting access and achievement in the education of under-represented students at urban community colleges. SSTI is an eleven-day residential program for community college students held at the University of California, Irvine campus. It is designed…

McGrath, Dennis; Van Buskirk, William

65

Teaching and Training in Geoinformatics: Experiences from the Cyberinfrastructure Summer Institute for Geoscientists (CSIG)  

NASA Astrophysics Data System (ADS)

The Cyberinfrastructure Summer Institute for Geoscientists (CSIG) has been conducted each year since 2004 under sponsorship of the GEON project that is funded by the NSF. The goal of the institute, which is broadly advertised to the Geoscience community, is to introduce geoscientists to Computer Science concepts and commonly-used as well as emergent information technology tools. The week-long program originally covered topics ranging from Data Modeling, Web Services, and Geographic Information Systems, to brief introductions to key concepts in Grid Computing, Parallel Programming, and Scientific Workflows. However, the program as well as the composition and expectations of the audience have evolved over time. Detailed course and instructor evaluations provide valuable feedback on course content and presentation approaches, and are used to plan future CSIG curriculum. From an initial emphasis on Geoscience graduate students and postdocs, the selection process has evolved to encourage participation by individuals with backgrounds in Geoscience as well as Computer Science from academia, government agencies, and industry. More recently, there has been an emphasis on selecting junior faculty and those interested in teaching Geoinformatics courses. While the initial objective of CSIG was to provide an overview of information technology topics via lectures and demonstrations, over time attendees have become more interested in specific instruction in how informatics and cyberinfrastructure (CI) capabilities could be utilized to address issues in Earth Science research and education. There have been requests over the years for more in-depth coverage on some topics and hands-on exercises. The program has now evolved to include a “Build Track”, focused on IT issues related to the development and implementation of Geoinformatics systems, and an “Education Track”, focused on use of Geoinformatics resources in education. With increasing awareness of CI projects, the audience is also becoming more interested in an introduction to the broader landscape of CI activities in the Geosciences and related areas. In the future, we plan a “demo” session to showcase various CI projects. Attendees will not only hear about such projects but will be able to use and experience the cyber-environments and tools in a hands-on session. The evolution of the CSIG program reflects major changes in the IT landscape since 2004. Where we once discussed Grid Computing, students are now learning about Cloud Computing and related concepts. An institute like CSIG play an important role in providing “cross-training” such that geoscientists gain insight into IT issues and solution approaches, while computer scientist gain a better appreciation of the needs and requirements of geoscience applications. In this presentation, we will summarize and analyze the trends over the years in program as well as audience composition; discuss lessons learnt over the years; and present our plan for future CSIG offerings.

Smeekens, M.; Baru, C.; Keller, G. R.; Arrowsmith, R.; Crosby, C. J.

2009-12-01

66

Transgender Health: A Review and Guidance for Future Research—Proceedings from the Summer Institute at the Center for Research on Health and Sexual Orientation, University of Pittsburgh  

Microsoft Academic Search

This article reports on the outcome of the Summer Institute on Transgender Health Research held July 24–26, 2008, at the University of Pittsburgh, Pennsylvania. The institute attendees included a panel of experts in the field of transgender research. The goals of the institute were to provide an opportunity to learn more about transgender health research, to foster a dialogue among

Emilia Lombardi

2011-01-01

67

Project Impact: A Pilot Study Evaluating the NDEA Summer Institute Program. Final Report.  

ERIC Educational Resources Information Center

|Three separate projects were involved in this evaluation project. Project 1 involved teacher-participants, teaching staffs, and institute directors and asked their opinions about general institute performance and particular subject matter coverage. Project 2 focused on the teacher-participants only, investigating the effects of institute

Perloff, Evelyn; And Others

68

GPS Activities at SLAC  

SciTech Connect

The Alignment Engineering Group of the Stanford Linear Accelerator Center (SLAC) started to use RTK (real-time kinematic) GPS equipment in order to perform structure mapping and GIS-related tasks on the SLAC campus. In a first step a continuously observing GPS station (SLAC M40) was set up. This station serves as master control station for all differential GPS activities on site and its coordinates have been determined in the well-defined global geodetic datum ITRF2000 at a given reference epoch. Some trials have been performed to test the RTK method. The tests have proven RTK to be very fast and efficient.

Behrend, Dirk

2002-11-19

69

Meeting Report: The First National Academies Summer Institute for Undergraduate Education in Biology  

ERIC Educational Resources Information Center

|The 2002 NRC Report "Bio 2010" (NRC, 2003), calling for changes in undergraduate education for biologists, suggested the establishment of summer workshops to help implement reform. While the report was in press, Millard Susman, a retired genetics professor at the University of Wisconsin, Madison, and Bob Yuan, a professor at University of…

Wood, William; Gentile, James

2003-01-01

70

Outcomes of a Summer Institute for Teachers of Students with Autism and Emotional Disturbance  

ERIC Educational Resources Information Center

|The Summer Achievement Center is a collaborative partnership between a large urban school district in Fresno County and California State University, Fresno designed to prepare teachers to teach students with autism and emotional disturbance. The purpose of this study was to examine characteristics of individuals teaching students with autism or…

Pinheiro, Tangee Gae

2010-01-01

71

Meeting Report: The First National Academies Summer Institute for Undergraduate Education in Biology  

ERIC Educational Resources Information Center

The 2002 NRC Report "Bio 2010" (NRC, 2003), calling for changes in undergraduate education for biologists, suggested the establishment of summer workshops to help implement reform. While the report was in press, Millard Susman, a retired genetics professor at the University of Wisconsin, Madison, and Bob Yuan, a professor at University of…

Wood, William; Gentile, James

2003-01-01

72

Proceedings of the Summer Institute on Biological Control of Plant Insects and Diseases.  

ERIC Educational Resources Information Center

|This institute, conducted at Mississippi State University, was an outgrowth of the Council of Higher Education in the Agricultural Science's efforts to study the needs and opportunities for the advancement of scientific knowledge in land grant institutions and recommend programs for implementation. The proceedings serve as an information source…

Maxwell, Fowden G., Ed.; Harris, F. A., Ed.

73

Institute Overview: Development, Goals, Structure and Content. Dissemination Packet--Summer 1989: Booklet #1.  

ERIC Educational Resources Information Center

The Teacher Training Institute at Hofstra University (New York), a 3-year program of inservice courses and special events of exemplary secondary school mathematics teachers. The institute was the joint effort of the Hofstra University Mathematics Department and School of Secondary Education. It was developed by a broad base of concerned educators…

Knee, David; McKeough, William J.

74

1976 Retrospect...; Proceedings of Children's Literature Institute (5th, University of Toledo, Summer, 1976).  

ERIC Educational Resources Information Center

|The fifth Children's Literature Institute focused upon United States historical fiction. This volume discusses the lives, works, and ideas of the nine authors who made presentations at the institute. They are: Milton Meltzer, author of books about such minority groups as Native Americans, Blacks, and Jews; Brinton Turkle, whose books include a…

Moir, Hughes, Ed.; Henning, Mary Jo, Ed.

75

Lecture Demonstrations in Chemistry: A Two-Week Summer Institute for Pre-College Teachers.  

ERIC Educational Resources Information Center

Described are the objectives, schedule and evaluation of an institute. Listed are demonstrations performed illustrating physical properties and physical change, energy changes, and chemical equilibrium. Discussed are the advantages of using demonstrations in teaching precollege chemistry. (CW)

Serianz, Art; Graham, Dennis

1988-01-01

76

Polarization at SLAC  

SciTech Connect

A highly polarized electron beam is a key feature. for the Current physics program at SLAC. An electron beam polarization of 80% can now be routinely achieved for typically 5000 hours of machine operation per year. Two main Physics programs utilize the polarized beam. Fixed target experiments in End Station A study the collision of polarized electrons with polarized nuclear targets to elucidate the spin structure of the nucleon and to provide an important test of QCD. Using the SLAC Linear Collider, collisions of polarized electrons with unpolarized positrons allow precise measurements of parity violation in the Z-fermion couplings and provide a very precise measurement of tile weak mixing angle. This paper discusses polarized beam operation at SLAC, and gives an overview of the polarized physics program.

Woods, M.

1995-01-01

77

Descriptive survey of Summer Genetics Institute nurse graduates in the USA.  

PubMed

The purpose of this study was to describe the clinical, research, educational, and professional activities that nurses are engaged in following participation in a 2 month intramural genetics training program. An online survey was administered in 2010 to graduates of the program sponsored by the US National Institute of Nursing Research from 2000 to 2009, in Bethesda, Maryland, USA. The electronic, voluntary survey was sent to 189 graduates via email. The survey included demographic characteristics, educational preparation, professional roles and responsibilities, and attitudes about genetic testing and privacy issues. Of the 95 graduates responding to the survey, 74% had doctorates and 70% were advanced practice nurses. All respondents reported incorporating genetics knowledge into daily clinical, academic, or research practices since completing the program, with 72% reporting being involved in genetically-focused research (52% with research funding), 32% incorporating genetics into patient care, and 79% providing genetics education. Respondents working in a hospital setting or academic institution were more likely to desire additional training in genetics. National Institute of Nursing Research graduates have successfully integrated genomics into a variety of nursing practices. PMID:22676234

Hickey, Kathleen T; Sciacca, Robert R; McCarthy, Mary S

2012-06-08

78

SLAC Linear Collider  

SciTech Connect

A report is given on the goals and progress of the SLAC Linear Collider. The status of the machine and the detectors are discussed and an overview is given of the physics which can be done at this new facility. Some ideas on how (and why) large linear colliders of the future should be built are given.

Richter, B.

1985-12-01

79

SLAC B Factory computing  

SciTech Connect

As part of the research and development program in preparation for a possible B Factory at SLAC, a group has been studying various aspects of HEP computing. In particular, the group is investigating the use of UNIX for all computing, from data acquisition, through analysis, and word processing. A summary of some of the results of this study will be given, along with some personal opinions on these topics.

Kunz, P.F.

1992-02-01

80

Summer Institute to Train Data Processing Teachers for the New Oklahoma State-Wide Computer Science System, Phase II. Final Report.  

ERIC Educational Resources Information Center

|Twenty-three instructors participated in an 8-week summer institute to develop their technical competency to teach the second year of a 2-year Technical Education Computer Science Program. Instructional material covered the following areas: (1) compiler languages and systems design, (2) cost studies, (3) business organization, (4) advanced…

Tuttle, Francis

81

From Tales of the Tongue to Tales of the Pen: An Organic Approach to Children's Literature. Resource Guide. NEH 1989 Summer Institute.  

ERIC Educational Resources Information Center

Developed from the activities of a summer institute in Texas that focused on "The Odyssey," folk and fairy tale, and folk rhyme, this resource guide presents 50 lesson plans offering a variety of approaches to teaching mythology and folklore to elementary school students. The lesson plans presented in the resource guide share a common foundation…

Southwest Texas State Univ., San Marcos. Dept. of English.

82

Lesson Plans from the "Creating a Supportive Environment for Wai'anae's Children & Youth" Summer Institute. July 14-18, 1997.  

ERIC Educational Resources Information Center

|This summer institute was specifically designed to give the Wai'anae community in Hawaii a chance to share ideas that would strengthen the support for all of their youth. It also gave them a chance to learn about resiliency, which is defined as "a person's capacity to survive through life's difficulties." Resiliency can be fostered in youth by…

Hawaii Univ., Manoa. Coll. of Education.

83

Luminosity enhancements at SLAC  

SciTech Connect

Several ideas are discussed that have been proposed to improve the luminosity at the SPEAR and PEP electron-positron storage rings and to insure good luminosity at the SLAC Linear Collider. There have been two proposals studied recently for SPEAR: a Microbeta insertion using Samarium Cobalt permanent magnets, and a Minibeta insertion using conventional quadrupole magnets. The notations Microbeta and minibeta used here are somewhat arbitrary since the front faces of the first quadrupole magnets for both insertions are at nearly the same distance from the interaction point.

Coward, D.H.

1984-04-01

84

2011 Summer Student Research.  

National Technical Information Service (NTIS)

Multiple student research abstracts are included for summer 2011. All students presented their research results as posters or orals in the Undergraduate Research Summer Institute at Benedict College. Arianna Gladney won the second prize in oral competitio...

A. Gladney A. Lucas B. Fleming C. Qin J. Deputy

2012-01-01

85

Approaches for the Evaluation of the National Cancer Institute's Summer Curriculum in Cancer Prevention: lessons from the all-Ireland NCI cancer consortium.  

PubMed

The NCI Summer Curriculum in Cancer Prevention (SCCP) has provided interdisciplinary training in cancer prevention and control to cancer health-care professionals, including nurses, physicians, and scientists, since 1986. It has trained over 1,200 participants, 256 of them from Ireland and Northern Ireland through two summer courses: a 4-week course on Principles and Practice of Cancer Prevention and Control (PP) and 1-week on Molecular Prevention (MP). This report is our attempt to measure achievements and level of satisfaction among alumni from the island of Ireland upon return to their home institution. A questionnaire was developed to assess this. Our analysis found statistically significant differences in the types of accomplishments reported among respondents of the MP and PP courses as well as statistically significant differences in their level of satisfaction. More data are needed to better explain the differences observed as well as level of resources available to alumni upon their return home. PMID:22544512

Otero, Isabel V; Williams, Makeda; Harford, Joe B

2012-06-01

86

UNIVERSITY OF ILLINOIS SUMMER INSTITUTE FOR TEACHERS OF ORNAMENTAL HORTICULTURE IN THE MIDWESTERN SECTION OF THE UNITED STATES.  

ERIC Educational Resources Information Center

|A RESEARCH AND DEVELOPMENT PROJECT, DESIGNED TO RETRAIN TEACHERS, DEVELOP ORNAMENTAL HORTICULTURE CURRICULUM MATERIALS, AND STIMULATE THE DEVELOPMENT OF VOCATIONAL ORNAMENTAL HORTICULTURE PROGRAMS IN THE MIDWESTERN UNITED STATES, INCLUDED TRAINING, SERVICE, AND EVALUATION ACTIVITIES. THIRTY TEACHERS SELECTED FROM 75 APPLICANTS ATTENDED A SUMMER

HEMP, PAUL E.

87

A Program Evaluation of a Summer Research Training Institute for American Indian and Alaska Native Health Professionals  

ERIC Educational Resources Information Center

|In this article, the authors describe a unique summer program to train American Indian/Alaska Native (AI/AN) health professionals in a variety of health research-related skills, including epidemiology, data management, statistical analysis, program evaluation, cost-benefit analysis, community-based participatory research, grant writing, and…

Zaback, Tosha; Becker, Thomas M.; Dignan, Mark B.; Lambert, William E.

2010-01-01

88

Summer science camp and follow-up program (Math/Science Institute). 1996--1997 program evaluation report.  

National Technical Information Service (NTIS)

The 1996-97 Summer Science Camp and Follow-up Program provided 307 students and 45 mentors with enrichment and problem-solving opportunities in mathematics, science and humanities and encouraged these students to consider careers in professions related to...

1998-01-01

89

SLAC Cosmic Ray Telescope Facility  

SciTech Connect

SLAC does not have a test beam for the HEP detector development at present. We have therefore created a cosmic ray telescope (CRT) facility, which is presently being used to test the FDIRC prototype. We have used it in the past to debug this prototype with the original SLAC electronics before going to the ESA test beam. Presently, it is used to test a new waveform digitizing electronics developed by the University of Hawaii, and we are also planning to incorporate the new Orsay TDC/ADC electronics. As a next step, we plan to put in a full size DIRC bar box with a new focusing optics, and test it together with a final SuberB electronics. The CRT is located in building 121 at SLAC. We anticipate more users to join in the future. This purpose of this note is to provide an introductory manual for newcomers.

Va'vra, J.

2010-02-15

90

Knowledge Without Goodness Is Dangerous. Moral Education in Boarding Schools. Report of the Summer Institute on Moral Education held at Phillips Exeter Academy (Exeter, New Hampshire, June 18-30, 1978).  

ERIC Educational Resources Information Center

Moral education in boarding schools is the topic of this publication which includes summaries of the proceedings of the Bicentennial Summer Institute sponsored by Phillips Exeter Academy in June 1978. Interspersed throughout are passages from a journal kept by a participant in the Institute. The contextual and didactic approaches to moral…

Terry, Charles L., Ed.

91

FACET: The New User Facility at SLAC  

SciTech Connect

FACET (Facility for Advanced Accelerator and Experimental Tests) is a new User Facility at SLAC National Accelerator Laboratory. Its high power electron and positron beams make it a unique facility, ideal for beam-driven Plasma Wakefield Acceleration studies. The first 2 km of the SLAC linac produce 23 GeV, 3.2 nC electron and positron beams with short bunch lengths of 20 {mu}m. A final focusing system can produce beam spots 10 {mu}m wide. User-aided Commissioning took place in summer 2011 and FACET will formally come online in early 2012. We present the User Facility, the current features, planned upgrades and the opportunities for further experiments. Accelerators are our primary tool for discovering the fundamental laws to the universe. Each new frontier we probe requires a new, more powerful method. Accelerators are therefore increasing in size and cost. The future of this field requires new accelerating techniques that can reach the high energies required over shorter distances. New concepts for high gradient acceleration include utilizing the wakes in plasma and dielectric and metallic structures. FACET was built to provide a test bed for novel accelerating concepts with its high charge and highly compressed beams. As a test facility unlike any other, it has also attracted groups interested in beam diagnostic techniques and terahertz studies. The first phase of the construction was completed in May 2011. Beam commissioning began in June and was interleaved with the installation of five experiments. Users were invited to aid with the commissioning for the month of August during which time experimental hardware and software were checked out and some first measurements were taken. FACET is currently in the process of becoming a Department of Energy User Facility for High Energy Physics.

Clarke, C.I.; Decker, F.J.; Erikson, R.; Hast, C.; Hogan, M.J.; Iverson, R.; Li, S.Z.; Nosochkov, Y.; Phinney, N.; Sheppard, J.; Wienands, U.; Woodley, M.; Yocky, G.; /SLAC; Seryi, A.; /Oxford U., JAI; Wittmer, W.; /Michigan State U.

2011-12-13

92

Documenting the Physical Universe:Preserving the Record of SLAC from 1962 to 2005  

SciTech Connect

Since 1905, Albert Einstein's ''miraculous year'', modern physics has advanced explosively. In 2005, the World Year of Physics, a session at the SAA Annual meeting discusses three institutional initiatives--Einstein's collected papers, an international geophysical program, and a research laboratory--to examine how physics and physicists are documented and how that documentation is being collected, preserved, and used. This paper provides a brief introduction to the research laboratory (SLAC), discusses the origins of the SLAC Archives and History Office, its present-day operations, and the present and future challenges it faces in attempting to preserve an accurate historical record of SLAC's activities.

Deken, Jean Marie; /SLAC

2006-03-10

93

Financial management and job social skills training components in a summer business institute: a controlled evaluation in high achieving predominantly ethnic minority youth.  

PubMed

Ninety-two adolescents, predominantly ethnic minority high school students, participated in a structured Summer Business Institute (SBI). Participating youth were randomly assigned to receive either job social skills or financial management skills training components. Students who additionally received the job social skills training component were more likely to recommend their employment agency to others than were youth who received the financial management component, rated their overall on-the-job work experience more favorably, and demonstrated higher scores in areas that were relevant to the skills that were taught in the job social skills workshops. The financial management component also appeared to be relatively effective, as youth who received this intervention improved their knowledge of financial management issues more than youth who received job social skills, and rated their workshops as more helpful in financial management, as well as insurance management. Future directions are discussed in light of these results. PMID:15911687

Donohue, Brad; Conway, Debbie; Beisecker, Monica; Murphy, Heather; Farley, Alisha; Waite, Melissa; Gugino, Kristin; Knatz, Danielle; Lopez-Frank, Carolina; Burns, Jack; Madison, Suzanne; Shorty, Carrie

2005-07-01

94

Polarized electron beams at SLAC  

SciTech Connect

SLAC has successfully accelerated high energy polarized electrons for the Stanford Linear Collider and fixed polarized nuclear target experiments. The polarized electron beams at SLAC use a gallium arsenide (GaAlAs for E-142) photon emission source to provide the beam of polarized electrons with polarization of approximately 28% (41% for E-142). While the beam emittance is reduced in the damping ring for SLC operation a system of bend magnets and superconducting solenoids preserve and orient the spin direction for maximum longitudinal polarization at the collision point. The electron polarization is monitored with a Compton scattering polarimeter, and was typically 22% at the e[plus]e[minus] collision point for the 1992 run. Improvements are discussed to increase the source polarization and to reduce the depolarization effects between the source and the collision point.

Moffeit, K.C.

1992-11-01

95

Polarized electron beams at SLAC  

SciTech Connect

SLAC has successfully accelerated high energy polarized electrons for the Stanford Linear Collider and fixed polarized nuclear target experiments. The polarized electron beams at SLAC use a gallium arsenide (GaAlAs for E-142) photon emission source to provide the beam of polarized electrons with polarization of approximately 28% (41% for E-142). While the beam emittance is reduced in the damping ring for SLC operation a system of bend magnets and superconducting solenoids preserve and orient the spin direction for maximum longitudinal polarization at the collision point. The electron polarization is monitored with a Compton scattering polarimeter, and was typically 22% at the e{plus}e{minus} collision point for the 1992 run. Improvements are discussed to increase the source polarization and to reduce the depolarization effects between the source and the collision point.

Moffeit, K.C.

1992-11-01

96

GLAST beam test at SLAC  

SciTech Connect

In May and June, a beam test for GLAST calorimeter technologies was conducted. A parasitic low intensity electron/tagged photon beam line into the End Station A at SLAC was commissioned and used. The preliminary stage of the test was devoted to measuring the performance of the parasitic beam. In the main test we studied the response of GLAST prototype CsI and scintillating fiber calorimeters to the electrons and photons. Results of this work are discussed.

Engovatov, D.; Anthony, P.; Atwood, W. [NASA Ames Research Center, Moffitt Field, CA (United States)] [and others

1996-10-01

97

SLAC Linac Preparations for FACET  

SciTech Connect

The SLAC 3km linear electron accelerator has been cut at the two-thirds point to provide beams to two independent programs. The last third provides the electron beam for the Linac Coherent Light Source (LCLS), leaving the first two-thirds available for FACET, the new experimental facility for accelerator science and test beams. In this paper, we describe this separation and projects to prepare the linac for the FACET experimental program.

Erickson, R.; Bentson, L.; Kharakh, D.; Owens, A.; Schuh, P.; Seeman, J.; Sheppard, J.C.; Stanek, M.; Wittmer, W.; Yocky, G.; Wienands, U.; /SLAC

2011-02-07

98

Recent GPS Results at SLAC  

SciTech Connect

The Alignment Engineering Group (AEG) makes use of GPS technology for fulfilling part of its above ground surveying tasks at SLAC since early 2002. A base station (SLAC M40) has been set up at a central location of the SLAC campus serving both as master station for real-time kinematic (RTK) operations and as datum point for local GPS campaigns. The Leica RS500 system is running continuously and the GPS data are collected both externally (logging PC) and internally (receiver flashcard). The external logging is facilitated by a serial to Ethernet converter and an Ethernet connection at the station. Internal logging (ring buffer) is done for data security purposes. The weatherproof boxes for the instrumentation are excellent shelters against rain and wind, but do heat up considerably in sun light. Whereas the GPS receiver showed no problems, the Pacific Crest PDL 35 radio shut down several times due to overheating disrupting the RTK operations. In order to prevent heat-induced shutdowns, a protection against direct sun exposure (shading) and a constant air circulation system (ventilation) were installed. As no further shutdowns have occurred so far, it appears that the two measures successfully mended the heat problem.

Behrend, Dirk; Imfeld, Hans L.; /SLAC

2005-08-17

99

Review of the SLAC and Les Houches workshops  

SciTech Connect

Polarized Electron Source workshops have been held at varying intervals, beginning in 1983 when Charles Sinclair convened the first at SLAC. Since that time, three workshops were held in conjunction with the International Spin Symposia and two at other occasions. The increasing importance of polarized electron beams at accelerators has stimulated interest in these workshops. Two workshops have been held since the last International Spin Symposium in Nagoya. In 1993, a workshop was held at SLAC, and in 1994 at Les Houches, a polarized electron beam session was held as part of a polarized beam and targets workshop. This report summarizes highlights from the latter two workshops. {copyright} {ital 1995 American Institute of Physics.}

Prescott, C.Y. [Stanford Linear Accelerator Center, Stanford University, Stanford, California 94309 (United States)

1995-09-01

100

COMPUTER-AIDED DRAFTING AND DESIGN, A THREE-WEEK SUMMER INSTITUTE TRAINING PROGRAM (MIAMI-DADE JUNIOR COLLEGE, MIAMI, FLORIDA, JULY 10, 1967 - JULY 28, 1967). FINAL REPORT.  

ERIC Educational Resources Information Center

THIRTY-SIX INSTRUCTORS, SUPERVISORS, AND DEPARTMENT CHAIRMEN IN AREAS OF DRAFTING, ENGINEERING, MANUFACTURING, AND COMPUTER TECHNOLOGY AT JUNIOR COLLEGES, TECHNICAL, AND AREA VOCATIONAL SCHOOLS IN 20 STATES ATTENDED A 3-WEEK SUMMER INSTITUTE TRAINING PROGRAM ON COMPUTER-AIDED DRAFTING AND DESIGN. EXPERIENCE IN PROGRAMING THE IBM SYSTEM 1620 WITH…

MORPHONIOS, ALEX G.

101

The SLAC polarized electron source  

SciTech Connect

The SLAC polarized electron source employs a photocathode DC high voltage gun with a loadlock and a YAG pumped Ti:sapphire laser system for colliding beam experiments or a flash lamp pumped Ti:sapphire laser for fixed target experiments. It uses a thin, strained GaAs(100) photocathode, and is capable of producing a pulsed beam with a polarization of {ge}80% and a peak current exceeding 10 A. Its operating efficiency has reached 99%. The physics and technology of producing high polarization electron beams from a GaAs photocathode will be reviewed. The prospects of realizing a polarized electron source for future linear colliders will also be discussed.

Tang, H.; Alley, R.; Frisch, J. [and others

1995-06-01

102

Linear collider development at SLAC  

SciTech Connect

Linear collider R&D at SLAC comprises work on the present Stanford Linear Collider (SLC) and work toward the next linear collider (NLC). Recent SLC developments are summarized. NLC studies are divided into hardware-based and theoretical. We report on the status of the NLC Test Accelerator (NLCTA) and the final focus test beam (FFTB), describe plans for ASSET, an installation to measure accelerator structure wakefields, and mention IR design developments. Finally we review recent NLC theoretical studies, ending with the author`s view of next linear collider parameter sets.

Irwin, J.

1993-08-01

103

The SLAC P2 Marx  

SciTech Connect

A proposed high energy physics accelerator, the International Linear Collider, will require greater than five hundred rf stations. Each station is composed of a klystron driven by a modulator. Recently, the SLAC P2 Marx was designated the baseline modulator for the ILC. This paper describes some key features of this modulator and presents recent experimental results. The P2 Marx is presently being transported to another facility for lifetime testing. Here, we will gain understanding of how the Marx performs into a klystron load and gain experience operating the Marx for longer periods. Long term plans include the possibility of using this rf station for L-band technology demonstration at SLAC. While the Marx was designed with the ILC in mind, the topology can be readily applied to several different applications. We are currently evaluating the use of the topology for ESS, CLIC, and upgrades for systems at Fermi National Accelerator Laboratory. Because of the modular nature of the cell and the robustness of the control system, many different combinations of series and parallel operation are possible along with different load currents and pulse shapes.

Kemp, Mark; Benwell, Andrew; Burkhart, Craig; MacNair, David; Nguyen1, Minh; /SLAC

2012-07-05

104

Performance of the beam position monitor system for the SLAC PEP-II {ital B} factory  

SciTech Connect

The beam position monitor (BPM) system for the SLAC PEP-II {ital B} Factory was designed to measure the positions of single-bunch single-turn to multibunch multi-turn beams in both rings of the facility. Each BPM is based on four button-style pickups. At most locations the buttons are connected to provide single-axis information ({ital x} only or {ital y} only). Operating at a harmonic (952 MHz) of the bunch spacing, the BPM system combines broadband and narrowband capabilities and provides data at a high rate. The active electronics system is multiplexed for signals from the high-energy ring (HER) and low-energy ring (LER). The system will be briefly described; however, the main purpose of the present paper is to present operational results. The BPM system operated successfully during commissioning of the HER (primarily) and the LER over the past year. Results to be presented include on-line calibration, single-bunch single-turn resolution ({lt}100 {mu}m), and multibunch multi-turn resolution ({lt}3 {mu}m), multiplexing, and absolute calibration. Thus far, the system has met or exceeded all the requirements that have been tested. The remaining requirements will be tested when both rings are completed and commissioned this summer. In addition, typical results of beam physics studies relying on the BPM system will be presented. {copyright} {ital 1998 American Institute of Physics.}

Johnson, R.G.; Smith, S.R.; Aiello, G.R. [Stanford Linear Accelerator Center P.O. Box 4349, Stanford, California 94309 (United States)

1998-12-01

105

Linear collider research and development at SLAC, LBL and LLNL  

SciTech Connect

The study of electron-positron (e/sup +/e/sup /minus//) annihilation in storage ring colliders has been very fruitful. It is by now well understood that the optimized cost and size of e/sup +/e/sup /minus// storage rings scales as E(sub cm//sup 2/ due to the need to replace energy lost to synchrotron radiation in the ring bending magnets. Linear colliders, using the beams from linear accelerators, evade this scaling law. The study of e/sup +/e/sup /minus// collisions at TeV energy will require linear colliders. The luminosity requirements for a TeV linear collider are set by the physics. Advanced accelerator research and development at SLAC is focused toward a TeV Linear Collider (TLC) of 0.5--1 TeV in the center of mass, with a luminosity of 10/sup 33/--10/sup 34/. The goal is a design for two linacs of less than 3 km each, and requiring less than 100 MW of power each. With a 1 km final focus, the TLC could be fit on Stanford University land (although not entirely within the present SLAC site). The emphasis is on technologies feasible for a proposal to be framed in 1992. Linear collider development work is progressing on three fronts: delivering electrical energy to a beam, delivering a focused high quality beam, and system optimization. Sources of high peak microwave radio frequency (RF) power to drive the high gradient linacs are being developed in collaboration with Lawrence Berkeley Laboratory (LBL) and Lawrence Livermore National Laboratory (LLNL). Beam generation, beam dynamics and final focus work has been done at SLAC and in collaboration with KEK. Both the accelerator physics and the utilization of TeV linear colliders were topics at the 1988 Snowmass Summer Study. 14 refs., 4 figs., 1 tab.

Mattison, T.S.

1988-10-01

106

X-BAND KLYSTRON DEVELOPMENT AT SLAC  

SciTech Connect

The development of X-band klystrons at SLAC originated with the idea of building an X-band Linear Collider in the late 1980's. Since then much effort has been expended in developing a reliable X-band Power source capable of delivering >50 MW RF power in pulse widths >1.5 {micro}s. I will report on some of the technical issues and design strategies which have led to the current SLAC klystron designs.

Vlieks, Arnold E.; /SLAC

2009-08-03

107

SLC Energy Upgrade Program at SLAC  

SciTech Connect

The SLAC Linear Collider (SLC) must reach a nominal center-of-mass energy of 100 GeV to fulfill its high energy physics goals. This paper describes the energy upgrade program that is being implemented on the SLAC linear accelerator to meet these goals. It includes a discussion of the design requirements and available technical options, the rationale for the adopted solution, and the technical problems involved in the engineering and production of klystrons and modulators.

Loew, G.A.; Allen, M.A.; Cassel, R.L.; Dean, N.R.; Konrad, G.T.; Koontz, R.F.; Lebacqz, J.V.

1985-03-01

108

An Automated 476 MHz RF Cavity Processing Facility at SLAC  

SciTech Connect

The 476 MHz accelerating cavities currently used at SLAC are those installed on the PEP-II B-Factory collider accelerator. They are designed to operate at a maximum accelerating voltage of 1 MV and are routinely utilized on PEP-II at voltages up to 750 kV. During the summer of 2003, SPEAR3 will undergo a substantial upgrade, part of which will be to replace the existing 358.54 MHz RF system with essentially a PEP-II high energy ring (HER) RF station operating at 476.3 MHz and 3.2 MV (or 800 kV/cavity). Prior to installation, cavity RF processing is required to prepare them for use. A dedicated high power test facility is employed at SLAC to provide the capability of conditioning each cavity up to the required accelerating voltage. An automated LabVIEW based interface controls and monitors various cavity and test stand parameters, increasing the RF fields accordingly such that stable operation is finally achieved. This paper describes the high power RF cavity processing facility, highlighting the features of the automated control system and illustrating its operation with some recent high power processing results.

McIntosh, P.

2003-07-29

109

Summer Astronomy  

ERIC Educational Resources Information Center

|This brief article describes what can be expected of the skies in the summer of 2004 with quite a few celestial thrills to anticipate. In addition to the planet viewing opportunities, there is a very rare Venus transit of the Sun and the annual Perseid meteor shower. The 2004 summer also marks both an end and beginning for the Cassini/Huygens…

Riddle, Bob

2004-01-01

110

S-Band Loads for SLAC Linac  

SciTech Connect

The S-Band loads on the current SLAC linac RF system were designed, in some cases, 40+ years ago to terminate 2-3 MW peak power into a thin layer of coated Kanthal material as the high power absorber [1]. The technology of the load design was based on a flame-sprayed Kanthal wire method onto a base material. During SLAC linac upgrades, the 24 MW peak klystrons were replaced by 5045 klystrons with 65+ MW peak output power. Additionally, SLED cavities were introduced and as a result, the peak power in the current RF setup has increased up to 240 MW peak. The problem of reliable RF peak power termination and RF load lifetime required a careful study and adequate solution. Results of our studies and three designs of S-Band RF load for the present SLAC RF linac system is discussed. These designs are based on the use of low conductivity materials.

Krasnykh, A.; Decker, F.-J.; /SLAC; LeClair, R.; /INTA Technologies, Santa Clara

2012-08-28

111

1979 Summer Study Program in Geophysical Fluid Dynamics at the Woods Hole Oceanographic Institution, Notes on Polar Oceanography. Volume II. Lectures of the Fellows.  

National Technical Information Service (NTIS)

This volume contains the manuscripts of research lectures by the nine fellows of the summer program. Some reports are obviously related to the main theme; some are related to crucial physical processes in the Polar Oceans; some are pure fluid dynamics or ...

M. E. Stern F. K. Mellor

1979-01-01

112

Physics results with polarized electrons at SLAC  

SciTech Connect

Polarized electron beams can play an important role in the dynamics of interactions at high energies. Polarized electron beams at SLAC have been an important part of the physics program since 1970, when they were first proposed for use in testing the spin structure of the proton. Since 1992, the SLAC linear accelerator and the SLC have operated solely with polarized electrons, providing data for tests of QCD in studies of the spin structure of the nucleon and tests of the electroweak sector of the Standard Model. In the following sections, the performance of the source is summarized, and some of the recent results using the polarized beams are discussed.

Prescott, C.Y.

1996-03-01

113

Computer control of rf at SLAC  

SciTech Connect

The Stanford Linear Accelerator is presently upgraded for the SLAC Linear Collider project. The energy is to be increased from approximately 31 GeV to 50 GeV. Two electron beams and one positron beam are to be accelerated with high demands on the quality of the beams. The beam specifications are shown. To meet these specifications, all parameters influencing the beams have to be under tight control and continuous surveillance. This task is accomplished by a new computer system implemented at SLAC which has, among many other functions, control over rf accelerating fields. 13 refs., 8 figs., 2 tabs.

Schwarz, H.D.

1985-03-01

114

ESTB: A New Beam Test Facility at SLAC  

SciTech Connect

End Station A Test Beam (ESTB) is a beam line at SLAC using a small fraction of the bunches of the 13.6 GeV electron beam from the Linac Coherent Light Source (LCLS), restoring test beam capabilities in the large End Station A (ESA) experimental hall. ESTB will provide one of a kind test beam essential for developing accelerator instrumentation and accelerator R&D, performing particle and particle astrophysics detector research, linear collider machine and detector interface (MDI) R&D studies, development of radiation-hard detectors, and material damage studies with several distinctive features. In the past, 18 institutions participated in the ESA program at SLAC. In stage I, 4 new kicker magnets will be added to divert 5 Hz of the LCLS beam to the A-line. A new beam dump will be installed and a new Personnel Protection System (PPS) is being built in ESA. In stage II, a secondary hadron target will be installed, able to produce pions up to about 12 GeV/c at 1 particle/pulse.

Pivi, M.; Fieguth, T.; Hast, C.; Iverson, R.; Jaros, J.; Jobe, K.; Keller, L.; Walz, D.; Weathersby, S.; Woods, M.; /SLAC

2011-04-05

115

Summer Reading  

NASA Astrophysics Data System (ADS)

Summer, a great time for leisure reading, a great time to try something different! Dick Pagni, Cheryl Frech, Brian Coppola, Jeffrey Kovac, and Hal Harris provide plenty of suggestions to keep you reading!

Pagni, Dick; Frech, Cheryl; Coppola, Brian; Kovac, Jeffrey; Harris, Hal

2007-06-01

116

Future Proof for Physics: Preserving the Record of SLAC  

ERIC Educational Resources Information Center

|This article provides a brief introduction to the Stanford Linear Accelerator Center (SLAC), discusses the origins of the SLAC Archives and History Office, its present-day operations, and the present and future challenges it faces in attempting to preserve an accurate historical record of SLAC's activities. (Contains 21 notes.)|

Deken, Jean Marie

2005-01-01

117

100 MW klystron development at SLAC  

Microsoft Academic Search

A klystron designed to operate at 11.4 GHz and 440 kV is presently Stanford Linear Accelerator Center's (SLAC's) strongest RF power source candidate for the Next Linear Collider. It is expected to provide 100 MW of RF power with a pulse width of 1 ?s. The authors describe progress in the development of this device including results from single- and

A. E. Vlieks; R. S. Callin; G. Caryotakis; K. S. Fant; W. R. Fowkes; T. G. Lee; E. L. Wright

1991-01-01

118

An overview of the SLAC results  

SciTech Connect

The history of nucleon spin-structure measurements goes back to the early days of inelastic electron scattering at SLAC, when Vernon Hughes came with a proposal to accelerate polarized electrons to high energy and to study inelastic scattering from a polarized proton target. The quark model of the proton was new at the time, and the spin-dependent structure functions were an excellent testing ground for that model. The proposal developed into an experiment which became SLAC experiment E80. Subsequent experiments followed those early studies, leading to E130 at SLAC, then EMC at CERN, and a host of later experiments. In 1988 the EMC Collaboration published the first data to reach low x. The asymmetries EMC observed fell below quark model expectations, and the experimentally measured proton sum rule indicated that the spin of the quarks contributed little to the proton spin. The subject of nucleon spin-dependent structure functions was stimulated by this surprising result from EMC. The continuation of the spin-structure studies at SLAC, which have been very active in recent years, was stimulated by the successful development of high-intensity beams of polarized electrons. Table 1 lists the past, present, and planned programs and experiments that grew out of the early work. The rest of the report is divided into the following topics: polarized electrons; polarimetry; the SLAC spectrometers; radiative corrections; the proton measurements; neutron targets; the deuterium and {sup 3}He data; the g{sub 2} structure function; and the 50 GeV upgrade of the SLC.

Prescott, C.Y.

1996-03-01

119

Summer Days.  

ERIC Educational Resources Information Center

In response to regular faculty complaints about mainstreamed students, a 5-week Summer Special Education Program was implemented in 1986 at the Western Navajo Agency's Tuba City Boarding School. The program's purpose was to train regular teachers and support personnel in special education procedures and practices and to provide the exceptional…

Foster, Carl; Beeman, Sandi

120

Summer Skies  

ERIC Educational Resources Information Center

|During the evening hours of the summer of 2005, there will be numerous opportunities to observe several of the brighter planets as they move along their respective orbits, overtaking and passing one another, performing a planetary dance with the choreography set to orbital speeds. With the exception of Mars, the visible planets will all be in the…

Science Scope, 2005

2005-01-01

121

Summer Camp.  

ERIC Educational Resources Information Center

|Government regulation of children's summer camps, particularly involving health and safety standards, is discussed in a series of brief interviews with camp directors and representatives of camp associations. Transcribed from the National Public Radio weekly broadcast, "Options in Education," the program includes a lengthy montage of children's…

Burns, Maxine; And Others

122

Institute in Physical Science. A Category 1 Spring and Summer Inservice Program for Elementary and Secondary Teachers of Physical Science in the Austin Metropolitan Community. Austin, Texas.  

ERIC Educational Resources Information Center

The Institute in Physical Science was developed to address the need for updated information and training in physics, chemistry, and technology among teachers of physical science. Five major objectives addressed were to: (1) improve physical science teachers' understanding of fundamental concepts in physics and chemistry; (2) provide physical…

Crawley, Frank E.

123

Liquid Hydrogen Target Experience at SLAC  

SciTech Connect

Liquid hydrogen targets have played a vital role in the physics program at SLAC for the past 40 years. These targets have ranged from small 'beer can' targets to the 1.5 m long E158 target that was capable of absorbing up to 800 W without any significant density changes. Successful use of these targets has required the development of thin-wall designs, liquid hydrogen pumps, remote positioning and alignment systems, safety systems, control and data acquisition systems, cryogenic cooling circuits and heat exchangers. Detailed operating procedures have been created to ensure safety and operational reliability.This paper surveys the evolution of liquid hydrogen targets at SLAC and discusses advances in several of the enabling technologies that made these targets possible.

Weisend, J. G. II; Boyce, R.; Candia, A.; Kaminskas, W.; Mark, J.; Racine, M.; St Lorant, S.; Weber, T. [Stanford Linear Accelerator Center, Menlo Park, CA 94025 (United States); Arnold, R.; Bosted, P. [University of Massachusetts, Amherst, MA 01003 (United States); Carr, R.; Gao, J.; Jones, C. E.; McKeown, R. [California Institute of Technology, Pasadena, CA 91125 (United States)

2006-04-27

124

Liquid Hydrogen Target Experience at SLAC  

SciTech Connect

Liquid hydrogen targets have played a vital role in the physics program at SLAC for the past 40 years. These targets have ranged from small ''beer can'' targets to the 1.5 m long E158 target that was capable of absorbing up to 800 W without any significant density changes. Successful use of these targets has required the development of thin wall designs, liquid hydrogen pumps, remote positioning and alignment systems, safety systems, control and data acquisition systems, cryogenic cooling circuits and heat exchangers. Detailed operating procedures have been created to ensure safety and operational reliability. This paper surveys the evolution of liquid hydrogen targets at SLAC and discusses advances in several of the enabling technologies that made these targets possible.

Weisend, J.G.; Boyce, R.; Candia, A.; Kaminskas, W.; Mark, J.; Racine, M.; St. Lorant, S.; Weber, T.; /SLAC; Arnold, R.; Bosted, P.; /Massachusetts U., Amherst; Carr, R.; Gao, J.; Jones, C.E.; McKeown, R.; /Caltech

2005-08-29

125

LCLS LLRF Upgrades to the SLAC Linac  

SciTech Connect

The Linac Coherent Light Source (LCLS) at SLAC will be the brightest X-ray laser in the world when it comes on line. In order to achieve the brightness a 200fS length electron bunch is passed through an undulator. To create the 200fS, 3kA bunch, a 10pS electron bunch, created from a photo cathode in an RF gun, is run off crest on the RF to set up a position to energy correlation. The bunch is then compressed by chicanes. The stability of the RF system is critical in setting up the position to energy correlation. Specifications derived from simulations require the RF system to be stable to below 200fS in several critical injector stations and the last kilometer of linac. The SLAC linac RF system is being upgraded to meet these requirements.

Akre, R.; Dowell, D.; Emma, P.; Frisch, J.; Hong, B.; Kotturi, K.; Krejcik, P.; Wu, J.; /SLAC; Byrd, J.; /LBL, Berkeley

2007-10-04

126

LLRF System Upgrade for the SLAC Linac  

SciTech Connect

The Linac Coherent Light Source (LCLS) at SLAC is in full user operation and has met the stability goals for stable lasing. The 250pC bunch can be compressed to below 100fS before passing through an undulator. In a new mode of operation a 20pC bunch is compressed to about 10fS. Experimenters are regularly using this shorter X-ray pulse and getting pristine data. The 10fS bunch has timing jitter on the order of 100fS. Physicists are requesting that the RF system achieve better stability to reduce timing jitter. Drifts in the RF system require longitudinal feedbacks to work over large ranges and errors result in reduced performance of the LCLS. A new RF system is being designed to help diagnose and reduce jitter and drift in the SLAC linac.

Hong, Bo; /SLAC; Akre, Ron; /SLAC; Pacak, Vojtech; /SLAC

2012-07-06

127

Development of the Virtual Visitor Center at SLAC  

Microsoft Academic Search

The Virtual Visitor Center (VVC) web site (www2.slac.stanford.edu\\/vvc) is a ''virtual'' version of the Visitor Center, a mini science museum that opened at SLAC in 1996. The VVC was made public in December 1998. Both centers contribute to SLAC mission regarding education of the next generation and increasing scientific awareness of the public. The site is designed to mimic the

McDunn; Ruth

1999-01-01

128

The SLAC Comparator for the Calibration of Digital Leveling Equipment  

SciTech Connect

At SLAC digital levels are used for precise leveling, both for setting out and monitoring. A very high precision of 30 {micro}m is required, which can only be achieved by regularly calibrating the leveling equipment. The calibration facility is also used for detailed investigations to refine the SLAC leveling procedure. In this paper the setup of the SLAC vertical comparator is described. In order to also perform traditional staff calibration a CCD camera was integrated into the SLAC comparator. Finally an overview of further investigations of our leveling equipment is presented.

Gassner, G.L.; Ruland, R.E.; /SLAC

2006-11-07

129

Summer Series 2012 - Shashi Buluswar  

ScienceCinema

The last installment of the "Summer Series of Conversations" took place Wednesday, August 1, with guest Shashi Buluswar, the executive director of the LBNL Institute for Globally Transformative Technologies (LIGTT). The Institute seeks to foster the discovery, development and deployment of a generation of low-carbon, affordable technologies that will advance sustainable methods to fight global poverty. The event, was hosted by Public Affairs Head Jeff Miller.

130

SLAC workshop on high energy electroproduction and spin physics  

SciTech Connect

These Proceedings contain copies of the transparencies presented at the Workshop on High Energy Electroproduction and Spin Physics held at SLAC on February 5--8, 1992. The purpose of this Workshop was to bring people together to discuss the possibilities for new experiments using the SLAC high intensity electron and photon beams and the facilities of End Station A.

Not Available

1992-01-01

131

SLAC workshop on high energy electroproduction and spin physics  

SciTech Connect

These Proceedings contain copies of the transparencies presented at the Workshop on High Energy Electroproduction and Spin Physics held at SLAC on February 5--8, 1992. The purpose of this Workshop was to bring people together to discuss the possibilities for new experiments using the SLAC high intensity electron and photon beams and the facilities of End Station A.

Not Available

1992-04-01

132

Polarized Light Sources for photocathode electron guns at SLAC  

SciTech Connect

We describe current and future Polarized Light Sources at SLAC for use with photocathode electron guns to produce polarized electron beams. The SLAC experiments SLD and E142 are considered, and are used to define the required parameters for the Polarized Light Sources.

Woods, M.; Frisch, J.; Witte, K.; Zolotorev, M.

1992-12-01

133

R&D of Accelerator Structures at SLAC  

SciTech Connect

The research activities for accelerator structures at SLAC are reviewed including the achievement via the main linac design for the Next Linear Collider (NLC), the program adjustment after the decision of the International Linear Collider (ILC) to be based on superconducting technology, and the work progress for the ILC, photon science at SLAC and basic accelerator structure studies.

Wang, J.W.; /SLAC

2007-01-17

134

Network resource and applications management at SLAC  

SciTech Connect

The Stanford Linear Accelerator Center (SLAC) has a heterogeneous networked computing environment with a variety of transmission media, protocols, equipment from multiple vendors, Local Areas Network (LAN) and Wide Area Network (WAN) connections, workstations, servers, legacy mainframes, operating systems, network services and applications, and users of various skill levels. New technologies are continually being deployed as they become available. All of these components work together (most of the time) but result in a complex distributed computing environment (henceforth referred to as the system) which requires automated monitoring and management for the maintenance of high quality performance with limited personnel and budgets. There is no Network Management Station (NMS) product which comes close to doing the job of monitoring and managing the LAN and WAN for SLAC. However, by making use of Ping, Simple Network Management Protocol (SNMP) and its Management Information Bases (MIBs), as well as network applications (trace-route, File Transfer Protocol (FTP), Remote Procedure Calls (RPCs), Remote Shell (rsh), et.al.), an NMS (Netview for AIX), and the accounting and monitoring facilities provided by the server operating systems, the challenge is surmountable.

Logg, C.A.; Cottrell, R.L.A.

1996-02-01

135

Report on the 2008 ISAGA Summer School  

ERIC Educational Resources Information Center

|This article reports on the 2008 ISAGA Summer School held in New Delhi (Gurgaon), India. This Summer School was hosted by the Institute for Integrated Learning in Management. Participants came from all over the world. This year's theme was "The Art and Science of Simulation and Gaming Design and Facilitation for Business and Management."|

van de Westelaken, Marleen

2011-01-01

136

NCI at Frederick: Summer Student Intern Program  

Cancer.gov

Summer programs at the National Institutes of Health (NIH) provide an opportunity to spend a summer working at the NIH side-by-side with some of the leading scientists in the world, in an environment devoted exclusively to biomedical research.

137

Relations between fish abundances, summer temperatures, and ...  

Treesearch

International Institute of Tropical Forestry ... Title: Relations between fish abundances, summer temperatures, and forest harvest in a northern ... Description: Short-term effects of forest harvest on fish habitat have been well documented, ...

138

Indian Summer  

SciTech Connect

This paper focuses on preserving and strengthening two resources culturally and socially important to the Shoshone-Bannock Indian Tribe on the Fort Hall Reservation in Idaho; their young people and the Pacific-Northwest Salmon. After learning that salmon were not returning in significant numbers to ancestral fishing waters at headwater spawning sites, tribal youth wanted to know why. As a result, the Indian Summer project was conceived to give Shoshone-Bannock High School students the opportunity to develop hands-on, workable solutions to improve future Indian fishing and help make the river healthy again. The project goals were to increase the number of fry introduced into the streams, teach the Shoshone-Bannock students how to use scientific methodologies, and get students, parents, community members, and Indian and non-Indian mentors excited about learning. The students chose an egg incubation experiment to help increase self-sustaining, natural production of steelhead trout, and formulated and carried out a three step plan to increase the hatch-rate of steelhead trout in Idaho waters. With the help of local companies, governmental agencies, scientists, and mentors students have been able to meet their project goals, and at the same time, have learned how to use scientific methods to solve real life problems, how to return what they have used to the water and land, and how to have fun and enjoy life while learning.

Galindo, E. [Sho-Ban High School, Fort Hall, ID (United States)

1997-08-01

139

Lattice Design for ERL Options at SLAC  

SciTech Connect

SLAC is investigating long-range options for building a high performance light source machine while reusing the existing linac and PEP-II tunnels. One previously studied option is the PEP-X low emittance storage ring. The alternative option is based on a superconducting Energy Recovery Linac (ERL) and the PEP-X design. The ERL advantages are the low beam emittance, short bunch length and small energy spread leading to better qualities of the X-ray beams. Two ERL configurations differed by the location of the linac have been studied. Details of the lattice design and the results of beam transport simulations with the coherent synchrotron radiation effects are presented.

Nosochkov, Yuri; Cai, Yunhai; Huang, Xiaobiao; Wang, Min-Huey; /SLAC

2011-06-02

140

Cerenkov ring imaging detector development at SLAC  

SciTech Connect

The imaging of Cerenkov light on to photosensitive detectors promises to be a powerful technique for identifying particles in colliding beam spectrometers. Toward this end two and three dimensional imaging photon detectors are being developed at SLAC. The present techniques involve photon conversion using easily ionized exotic chemicals like tetrakisdimethyl-amino-ethylene (TMAE) in a drift and amplifying gas mixture of methane and isobutane. Single photoelectrons from Cerenkov light are currently being drifted 20 cm and a new device under study will be used to study drifting up to 80 cm along a magnetic field. A short description of a large device currently being designed for the SLD spectrometer at the Stanford Linear Collider will be given.

Williams, S.H.

1984-06-01

141

ILC Linac R&D at SLAC  

SciTech Connect

Since the ITRP recommendation in August 2004 to use superconducting rf technology for a next generation linear collider, the former NLC Group at SLAC has been actively pursuing a broad range of R&D for this collider (the ILC). In this paper, the programs concerning linac technology are reviewed. Current activities include the development of a Marx-style modulator and a 10 MW sheet-beam klystron, operation of an L-band (1.3 GHz) rf source using an SNS HVCM modulator and commercial klystrons, design of a more efficient and less costly rf distribution system, construction of a coupler component test stand, fabrication of a prototype positron capture cavity, beam tests of prototype S-band linac beam position monitors and preparations for magnetic center stability measurements of a prototype SC linac quad.

Adolphsen, C.; /SLAC

2006-08-09

142

Resonant Kicker System Development at SLAC  

SciTech Connect

The design and installation of the Linear Coherent Light Source [1] at SLAC National Accelerator Laboratory has included the development of a kicker system for selective beam bunch dumping. The kicker is based on an LC resonant topology formed by the 50 uF energy storage capacitor and the 64 uH air core magnet load which has a sinusoidal pulse period of 400us. The maximum magnet current is 500 A. The circuit is weakly damped, allowing most of the magnet energy to be recovered in the energy storage capacitor. The kicker runs at a repetition rate of 120Hz. A PLC-based control system provides remote control and monitoring of the kicker via EPICS protocol. Fast timing and interlock signals are converted by discrete peak-detect and sample-hold circuits into DC signals that can be processed by the PLC. The design and experimental characterization of the system are presented.

Beukers, Tony; Krzaszczak, John; Larrus, Marc; Lira, Antonio de; /SLAC

2009-04-27

143

Network management and performance monitoring at SLAC  

SciTech Connect

The physical network plant and everything attached to it, including the software running on ``computers`` and other peripheral devices is the {bold system}. Subjectively, the ultimate measurers of {bold system} performance are the users and their perceptions of the performance of their networked applications. The performance of a {bold system} is affected by the physical network plant (routers, bridges, hubs, etc.) as well as by every ``computer`` and peripheral device that is attached to it, and the software running on the computers and devices. Performance monitoring of a network must therefore include computer systems and services monitoring as well as monitoring of the physical network plant. This paper will describe how this challenge has been tackled at SLAC, and how, via the World Wide Web, this information is made available for quick perusal by concerned personnel and users.

Logg, C.A.; Cottrell, R.L.A.

1995-08-01

144

Calculation of Radiation Damage in SLAC Targets  

SciTech Connect

Ti-6Al-4V alloys are being considered as a positron producing target in the Next Linear Collider, with an incident photon beam and operating temperatures between room temperature and 300 C. Calculations of displacement damage in Ti-6Al-4V alloys have been performed by combining high-energy particle FLUKA simulations with SPECTER calculations of the displacement cross section from the resulting energy-dependent neutron flux plus the displacements calculated from the Lindhard model from the resulting energy-dependent ion flux. The radiation damage calculations have investigated two cases, namely the damage produced in a Ti-6Al-4V SLAC positron target where the irradiation source is a photon beam with energies between 5 and 11 MeV. As well, the radiation damage dose in displacements per atom, dpa, has been calculated for a mono-energetic 196 MeV proton irradiation experiment performed at Brookhaven National Laboratory (BLIP experiment). The calculated damage rate is 0.8 dpa/year for the Ti-6Al-4V SLAC photon irradiation target, and a total damage exposure of 0.06 dpa in the BLIP irradiation experiment. In both cases, the displacements are predominantly ({approx}80%) produced by recoiling ions (atomic nuclei) from photo-nuclear collisions or proton-nuclear collisions, respectively. Approximately 25% of the displacement damage results from the neutrons in both cases. Irradiation effects studies in titanium alloys have shown substantial increases in the yield and ultimate strength of up to 500 MPa and a corresponding decrease in uniform ductility for neutron and high energy proton irradiation at temperatures between 40 and 300 C. Although the data is limited, there is an indication that the strength increases will saturate by doses on the order of a few dpa. Microstructural investigations indicate that the dominant features responsible for the strength increases were dense precipitation of a {beta} (body-centered cubic) phase precipitate along with a high number density of dislocation loops.

Wirth, B D; Monasterio, P; Stein, W

2008-04-03

145

Teacher Institutes  

NSDL National Science Digital Library

By putting teachers back into an intense learning and leadership environment, the National Science Foundation (NSF) is embarking on a major effort to improve the mathematics and science education of the nationâs youth. The three-year $5.5 million Teacher Institute project in Park City, Utah, involves middle and high school mathematics teachers from three school districts, including a small system in McAllen, Texas, and larger systems in Cincinnati, Ohio and Seattle, Washington. In summer resident sessions, the institute at Park City will train middle and secondary school teachers to become teacher-leaders.

146

Institute of Oceanography  

NSDL National Science Digital Library

Get your feet wet at a summer camp that focuses on marine biology. For example, check the Acadia Institute of Oceanography in Seal Harbor, Maine. If you're really interested, try to qualify for a scholarship.

Acadian Institute Of Oceanograpy, Seal H.; Gilmore, Sherry C.

147

Antarctica--the Ultimate Summer Institute.  

ERIC Educational Resources Information Center

|Describes personal experiences of a participant in the National Science Foundation program, Teachers Experiencing Antarctica. Uses the study of the temperature history of Taylor Dome to provide teachers with the experience of research and help other teachers recognize that there are opportunities outside the classroom for personal and…

Van Wey, Nate J.

1995-01-01

148

CMST Summer Institute Interactive Physics Lab Guide  

Microsoft Academic Search

98 page Interactive Physics Lab Guide including labs on:\\u000aTITLE\\u000aEQUIPMENT\\u000aHooke's Law\\u000asprings\\u000aCons of Energy: IP Sim: stopping d vs V,m,g \\u000aIP \\u000aRange of a Projectile\\u000aCPO: marble launchers\\u000aNewton's Second Law\\u000aCPO: cars & ramps\\u000aAtwood Machine\\u000aAtwood Pulleys\\u000aCircular Motion Dynamics\\u000aCircular Motion Apparatus\\u000aConservation of Energy: Rollercoasters\\u000aCPO: Rollercoaster \\u000aPlanetary Motion: Kepler's 1st & 2nd

Steve Whitman

2005-01-01

149

Morgan State University Summer Institute of Robotics  

NASA Website

[Students Grades 9-12] [Available: MD, PA, and NY] The purpose of this project is to increase the knowledge and understanding of the concepts and principles of robotics for urban high school students with an interest in careers in science, technology, ...

150

Slithering into Summer  

ERIC Educational Resources Information Center

|The summer provides a unique opportunity for children to further their interests in science, especially science in the out-of-doors. Once school is out for the summer, there is seemingly unlimited time, with no strict curriculum guidelines to follow. For students with a passion for the out-of-doors, summer science camps and school-based summer

Scott, Catherine; Matthews, Catherine

2012-01-01

151

Parton distributions from SMC and SLAC data  

SciTech Connect

We have extracted spin-weighted parton distributions in a proton from recent data at CERN and SLAC. The valence, sea quark and Antiquark spin-weighted distributions are determined separately. The data are all consistent with a small to moderate polarized gluon distribution, so that the anomaly term is not significant in the determination of the constituent contributions to the spin of the proton. We have analyzed the consistency of the results obtained from various sets of data and the Biorken sum rule. Although all data are consistent with the sum rule, the polarized distributions from different experiments vary, even with higher order QCD corrections taken into account. Results split into two models, one set implying a large polarized strange sea which violates the positivity bound, and the other set yielding a smaller polarized strange sea. Only further experiments which extract information about the polarized sea will reconcile these differences. We suggest specific experiments which can be performed to determine the size of the polarized sea and gluons.

Ramsey, G.P. [Loyola Univ., Chicago, IL (United States)]|[Argonne National Lab., IL (United States). High Energy Physics Div.; Goshtasbpour, M. [Center for Theoretical Physics and Mathematics, Tehran (Iran, Islamic Republic of)]|[Shahid Beheshti Univ., Tehran (Iran, Islamic Republic of)

1996-01-04

152

RF Gun Photocathode Research at SLAC  

SciTech Connect

LCLS is presently operating with a third copper photocathode in the original rf gun, with a quantum efficiency (QE) of {approx}1 x 10{sup -4} and projected emittance {gamma}{var_epsilon}{sub x,y} = 0.45 {micro}m at 250 pC bunch charge. The spare LCLS gun is installed in the SLAC Accelerator Structure Test Area (ASTA), fully processed to high rf power. As part of a wider photocathode R and D program, a UV laser system and additional gun diagnostics are being installed at ASTA to measure QE, QE lifetime, and electron beam emittance under a variety of operating conditions. The near-term goals are to test and verify the spare photocathode production/installation sequence, including transfer from the final holding chamber to the rf gun. Mid- and longer-term goals include development of a rigorous understanding of plasma and laser-assisted surface conditioning and investigation of new, high-QE photocathode materials. In parallel, an x-ray photoemission spectroscopy station is nearing completion, to analyze Cu photocathode surface chemistry. In this paper we review the status and anticipated operating parameters of ASTA and the spectroscopy test chamber.

Jongewaard, E.; Akre, R.; Brachmann, A.; Corbett, J.; Gilevich, S.; Grouev, K.; Hering, P.; P.Krejcik,; Lewandowski, J.; Loos, H.; Montagne, T.; Sheppard, J.C.; Stefan, P.; Vlieks, A.; Weathersby, S.; Zhou, F.; /SLAC

2012-05-16

153

A Summer Graduate Program for Electrical Engineering Faculty Members  

Microsoft Academic Search

Few formal programs have been developed with the specific goals of enabling faculty members to further their education in new and developing technical areas and to work towards advanced degrees in a planned sequence of summer courses. A summer graduate program for electrical engineering teachers was instituted in 1962 at Worcester Polytechnic Institute as a result of many months of

Glen A. Richardson

1968-01-01

154

Progress report on the SLAC Linear Collider  

SciTech Connect

In this paper we report on the status of the SLAC Linear Collider (SLC), the prototype of a new generation of colliding beam accelerators. This novel type of machine holds the potential of extending electron-positron colliding beam studies to center-of-mass (c.m.) energies far in excess of what is economically achievable with colliding beam storage rings. If the technical challenges posed by linear colliders are solvable at a reasonable cost, this new approach would provide an attractive alternative to electron-positron rings, where, because of rapidly rising synchrotron radiation losses, the cost and size of the ring increases with the square of the c.m. energy. In addition to its role as a test vehicle for the linear collider principle, the SLC aims at providing an abundant source of Z/sup 0/ decays to high energy physics experiments. Accordingly, two major detectors, the upgraded Mark II, now installed on the SLC beam line, and the state-of-the-art SLD, currently under construction, are preparing to probe the Standard Model at the Z/sup 0/ pole. The SLC project was originally funded in 1983. Since the completion of construction, we have been commissioning the machine to bring it up to a performance level adequate for starting the high energy physics program. In the remainder of this paper, we will discuss the status, problems and performance of the major subsystems of the SLC. We will conclude with a brief outline of the physics program, and of the planned enhancements to the capabilities of the machine. 26 refs., 7 figs.

Kozanecki, W.

1987-11-01

155

The News, Summer 1999-Summer 2000.  

ERIC Educational Resources Information Center

|This document contains five quarterly issues of The News, published Summer 1999 through Summer 2000 by the Community College League of California. The following items are contained in this document: "Grant Writing Success Depends on Resources, Information and Staff,""College Theaters Perform Balancing Act with Community, Instruction,…

Robertson, Trische, Ed.

2000-01-01

156

e+e- at SLAC: present and future  

NASA Astrophysics Data System (ADS)

The SLAC Linear Collider (SLC) with its 80% electron beam polarization combined with the SLD detector is the heart of the present SLAC e+e- physics program. The SLC/SLD program will continue through 1998, producing up to 500 000 additional polarized Z0 events. The next step for SLAC is studies of CP-violation in B-mesons using the PEP-II asymmetric B-Factory collider and the BaBar detector. PEP-II is presently under construction at SLAC in collaboration with Lawrence Berkeley National Laboratory, and Lawrence Livermore National Laboratory. The BaBar detector is being designed by an international collaboration of physicists. It features a superconducting solenoid, a CsI calorimeter, a novel Cherenkov ring-imaging detector, a drift chamber, and a 5-layer silicon vertex detector. First physics results are expected in 1999. SLAC is also a leading contributor to the international R&D program working toward the Next Linear Collider (NLC).

Mattison, Thomas S.

1996-02-01

157

Summer of Innovation  

NASA Website

[Educators Grades 4-9] [Available: Nationally] NASA's Summer of Innovation, or SoI, leverages current NASA research and discovery as a powerful context for student learning. The Summer of Innovation inspires middle school students and sparks ...

158

LP Summer Student Program  

Cancer.gov

D  CCR Home   About CCR   CCR Intranet        Laboratory of Pathology LP Home Clinical Services Basic Sciences Training LP Staff Accessibility of Web Site LP Summer Student Program 2003/2004 Poster Day Images Past Student Images Summer Student Home About

159

Slowing the Summer Slide  

ERIC Educational Resources Information Center

Research shows that summer slide--the loss of learning over the summer break--is a huge contributor to the achievement gap between low-income students and their higher-income peers. In fact, some researchers have concluded that two-thirds of the 9th-grade reading achievement gap can be explained by unequal access to summer learning opportunities…

Smith, Lorna

2012-01-01

160

SLAC Scanner Processor: a FASTBUS module for data collection and processing  

SciTech Connect

A new, general purpose, programmable FASTBUS module, the SLAC Scanner Processor (SSP), is introduced. Both hardware and software elements of SSP operation are discussed. The role of the SSP within the upgraded Mark II Detector at SLAC is described.

Brafman, H.; Glanzman, T.; Lankford, A.J.; Olsen, J.; Paffrath, L.

1984-10-01

161

PEP II: SLAC-based asymmetric B factory  

NASA Astrophysics Data System (ADS)

The proposal for upgrading the existing PEP collider at SLAC to enable the copious production of boosted B mesons is the result of several years of collaborative study by groups representing LBL, LLNL, and SLAC. The PEP II design has evolved in a considered fashion from its initial conceptualization to a very advanced level of understanding, well-substantiated by R&D results on the key design issues. We describe the proposed upgrade, review the early conceptual decisions, outline the significant remaining questions, and briefly describe current results from the ongoing R&D effort which have shown these questions to be tractable and the initial concepts to be sound.

Fieguth, T.

1992-02-01

162

An evaluation of the 1997 JPL Summer Teacher Enhancement Program  

SciTech Connect

There were two major components in the Jet Propulsion Laboratory (JPL) Summer Teacher Enhancement Project (STEP). First, the Summer Institute was structured as a four-week, 4-credit-unit University course for middle school science teachers, and consisted of workshops, lectures, labs, and tours as activities. The second component consists of follow-up activities related to the summer institute's contents, and again is structured as a University credit-bearing course for participants to reinforce their summer training. Considerable information from the comments and course ratings as given by the participants is included.

Slovacek, Simeon P.; Doyle-Nichols, Adelaide R.

1997-10-20

163

Energy efficient deQing for SLAC Klystron Modulators.  

National Technical Information Service (NTIS)

Two hundred and forty Klystron Modulator Stations at SLAC were converted to a new deQing circuit configuration. With the help of the new deQing circuit, the energy stored in a charging choke at the moment of deQing is no longer dissipated in a resistor bu...

V. V. Nesterov R. L. Cassel

1993-01-01

164

SLAC electron-positron colliders: present and future  

SciTech Connect

Stanford University's colliding beam program is outlined, including the SPEAR and PEP colliders and the SLAC linear collider. The accelerator developments to be pursued on these facilities are discussed, as well as advanced accelerator research and development. The items covered in the advanced accelerator research include beamstrahlung, stability requirements, breakdown limits, and power sources. (LEW)

Richter, B.

1986-09-01

165

Compton Photon Polarimeter for the SLAC Linear Collider  

Microsoft Academic Search

The longitudinal and transverse polarization of a high energy electron beam can be measured by the detection of photons produced in Compton scattering of the electrons from an intense polarized laser beam. We have built a calorimetric device based on the quartz fiber technology to perform polarization measurement at the SLAC Linear Collider. This detector was used to provide a

Steven Berridge; William Bugg; Hans Cohn; Yuri Efremenko; Yuri Kamyshkov; Dmitry Onoprienko; Achim Weidemann; Michael Woods

1999-01-01

166

Review of trigger and on-line processors at SLAC  

SciTech Connect

The role of trigger and on-line processors in reducing data rates to manageable proportions in e/sup +/e/sup -/ physics experiments is defined not by high physics or background rates, but by the large event sizes of the general-purpose detectors employed. The rate of e/sup +/e/sup -/ annihilation is low, and backgrounds are not high; yet the number of physics processes which can be studied is vast and varied. This paper begins by briefly describing the role of trigger processors in the e/sup +/e/sup -/ context. The usual flow of the trigger decision process is illustrated with selected examples of SLAC trigger processing. The features are mentioned of triggering at the SLC and the trigger processing plans of the two SLC detectors: The Mark II and the SLD. The most common on-line processors at SLAC, the BADC, the SLAC Scanner Processor, the SLAC FASTBUS Controller, and the VAX CAMAC Channel, are discussed. Uses of the 168/E, 3081/E, and FASTBUS VAX processors are mentioned. The manner in which these processors are interfaced and the function they serve on line is described. Finally, the accelerator control system for the SLC is outlined. This paper is a survey in nature, and hence, relies heavily upon references to previous publications for detailed description of work mentioned here. 27 references, 9 figures, 1 table.

Lankford, A.J.

1984-07-01

167

Recording PEP2 Ring Beam Losses at SLAC.  

National Technical Information Service (NTIS)

The PEP2 (e+)(e-) storage rings contain many complex interrelated systems. When the beam aborts, examining a record of the orbit from the time just before the abort can help identify the root cause. At the Stanford Linear Accelerator Center (SLAC) a syste...

M. Zelazny T. Gromme T. Himel L. Hendrickson K. Krauter

2005-01-01

168

Where do we stand on the SLC (SLAC Linear Collider)  

SciTech Connect

This paper reviews the current performance of the SLAC Linear Collider, as well as the issues, problems and prospects facing the project. A few of the original accelerator physics results achieved in the last year are described in detail. 36 refs., 12 figs., 1 tab.

Kozanecki, W.

1989-02-01

169

The University of Alabama at Birmingham Center for Community OutReach Development Summer Science Institute Program: A 3-Yr Laboratory Research Experience for Inner-City Secondary-Level Students  

ERIC Educational Resources Information Center

|This article describes and assesses the effectiveness of a 3-yr, laboratory-based summer science program to improve the academic performance of inner-city high school students. The program was designed to gradually introduce such students to increasingly more rigorous laboratory experiences in an attempt to interest them in and model what "real"…

Niemann, Marilyn A.; Miller, Michael L.; Davis, Thelma

2004-01-01

170

Laser Safety for the Experimental Halls at SLAC_s Linac Coherent Light Source (LCLS)  

SciTech Connect

The LCLS at the SLAC National Accelerator Laboratory will be the world's first source of an intense hard x-ray laser beam, generating x-rays with wavelengths of 1nm and pulse durations less than 100fs. The ultrafast x-ray pulses will be used in pump-probe experiments to take stop-motion pictures of atoms and molecules in motion, with pulses powerful enough to take diffraction images of single molecules, enabling scientists to elucidate fundamental processes of chemistry and biology. Ultrafast conventional lasers will be used as the pump. In 2009, LCLS will deliver beam to the Atomic Molecular and Optical (AMO) Experiment, located in one of 3 x-ray Hutches in the Near Experimental Hall (NEH). The NEH includes a centralized Laser Hall, containing up to three Class 4 laser systems, three x-ray Hutches for experiments and vacuum transport tubes for delivering laser beams to the Hutches. The main components of the NEH laser systems are a Ti:sapphire oscillator, a regen amplifier, green pump lasers for the oscillator and regen, a pulse compressor and a harmonics conversion unit. Laser safety considerations and controls for the ultrafast laser beams, multiple laser controlled areas, and user facility issues are discussed.

Woods, Michael; Anthony, Perry; /SLAC; Barat, Ken; /LBL, Berkeley; Gilevich, Sasha; Hays, Greg; White, William E.; /SLAC

2009-01-15

171

Celebrate Summer with Reading  

NSDL National Science Digital Library

School is out and the summer is full of both official and unofficial holidays that prompt us to enjoy science and the profession of sharing it. As in past years, the reviewers and editors of NSTA Recommends --ready and willing to share their enthusiasm for reading with you--have been gathering suggestions for the summer. So along with your beach chairs, flags, and fireworks schedules; collect some reading material for a summer of personal enrichment.

Texley, Juliana

2007-07-01

172

FASEB Summer Research Conferences  

NSDL National Science Digital Library

This website provides information regarding summer research conferences hosted internationally by FASEB. The conferences spread a wide range of scientific specialties and serve academics and health professionals.

2012-07-24

173

PLCO News, Spring/Summer 1998  

Cancer.gov

PLCO News, Spring/Summer 1998 TABLE OF CONTENTS Notes from the National Cancer Institute PLCO: State of the Union ReportGreetings and Happy New Year from NCI! Because You Asked Why Did PLCO Mail Mouthwash to Me? Around Town Highlights

174

Can Text Messages Mitigate Summer Melt?  

ERIC Educational Resources Information Center

Higher education officials have long been familiar with the concept of "summer melt," where students who have paid a deposit to attend one college or university instead matriculate at a different institution, usually presumed to be of comparable quality. In previous research, drawing on longitudinal data from various urban school districts…

Castleman, Benjamin L.; Page, Lindsay C.

2013-01-01

175

Factors Associated with Creative Collegiate Summer Programs.  

ERIC Educational Resources Information Center

|A study was conducted in 1986 to ascertain factors associated with creative summer session programs among U.S. universities and colleges. All were classified by Carnegie type as Doctoral granting, Research, and Comprehensive; all similar Canadian universities were considered, and 14 were included. Areas examined included: institutional

Young, Raymond J.

176

School Construction Summer Slam  

ERIC Educational Resources Information Center

|Every school has a list of renovations, upgrades and repairs that need attention, but many are too distracting and disruptive to carry out during the school year. Often, the best time to address these nagging construction projects is during the summer when students are on break and the campus is quieter. Although these "summer slammers" often are…

Jensen, Richard F.

2012-01-01

177

Anterior superior instability with rotator cuff tearing: SLAC lesion.  

PubMed

Anterosuperior instability of the shoulder may occur from a variety of pathologic lesions. We describe a specific entity, the SLAC (superior labrum, anterior cuff) lesion that involves an association of anterior-superior labral tear with a partial supraspinatus tear. We retrospectively isolated a group of 40 patients with this lesion. The presenting complaints, physical examination findings, surgical findings, and results were isolated. Overhead activities were the most common etiology; load and shift instability testing and whipple rotator cuff testing were the most common physical examination findings. Surgical repair was successful in 37 of the 40 patients. The SLAC lesion is a definable clinical entity with predictable history, examination, surgical pathology, and satisfactory results from surgery. PMID:11888140

Savoie, F H; Field, L D; Atchinson, S

2001-07-01

178

Laser Tracker Test Facility at SLAC - Progress Report  

SciTech Connect

Physics experiments at SLAC require high accuracy positioning, e. g. 100 {micro}m over a distance of 150 m or 25 {micro}m in a 10 x 10 x 3 meter volume. Laser Tracker measurement systems have become one of the most important tools for achieving these accuracies when mapping components. In order to improve and get a better understanding of laser tracker measurement tolerances we extended our laboratory with a rotary calibration table (Kugler GmbH) providing an accuracy of better than 0.2 arcsec. This paper gives an overview of the calibration table and its evaluation. Results of tests on two of our Laser Trackers utilizing the new rotary table as well as the SLAC interferometer bench are presented.

Gassner, G.L.; Ruland, R.E.; /SLAC

2008-02-22

179

An X-Band Gun Test Area at SLAC  

SciTech Connect

The X-Band Test Area (XTA) is being assembled in the NLCTA tunnel at SLAC to serve as a test facility for new RF guns. The first gun to be tested will be an upgraded version of the 5.6 cell, 200 MV/m peak field X-band gun designed at SLAC in 2003 for the Compton Scattering experiment run in ASTA. This new version includes some features implemented in 2006 on the LCLS gun such as racetrack couplers, increased mode separation and elliptical irises. These upgrades were developed in collaboration with LLNL since the same gun will be used in an injector for a LLNL Gamma-ray Source. Our beamline includes an X-band acceleration section which takes the electron beam up to 100 MeV and an electron beam measurement station. Other X-Band guns such as the UCLA Hybrid gun will be characterized at our facility.

Limborg-Deprey, C.; Adolphsen, C.; Chu, T.S.; Dunning, M.P.; Jobe, R.K.; Jongewaard, E.N.; Hast, C.; Vlieks, A.E.; Wang, F.; Walz, D.R.; /SLAC; Marsh, R.A.; Anderson, S.G.; Hartemann, F.V.; Houck, T.L.; /LLNL, Livermore

2012-09-07

180

Preliminary results of the echo-seeding experiment at SLAC  

SciTech Connect

ECHO-7 is a proof-of-principle echo-enabled harmonic generation FEL experiment in the Next Linear Collider Test Accelerator (NLCTA) at SLAC. The experiment aims to generate coherent radiation at 318 nm and 227 nm, which are the 5th and 7th harmonic of the infrared seed laser. In this paper we present the preliminary results from the commissioning run of the completed experimental setup which started in April 2010.

Xiang, D.; Colby, E.; Ding, Y.; Dunning, M.; Frederico, J.; Gilevich, S.; Hast, C.; Jobe, K.; McCormick, D.; Nelson, J.; Raubenheimer, T.O.; Soong, K.; Stupakov, G.; Szalata, Z.; Walz, D.; Weathersby, S.; Woodley, M.; Corlett, J.; Qiang, J.; Penn, G.; Prestemon, S.; Schlueter, R.; Venturini, M.; Wan, W.; Pernet, P-L.

2010-05-23

181

The X-band klystron program at SLAC  

SciTech Connect

The X-band rf source development at SLAC can be considered a qualified success. A total of twelve klystrons were built. Six of them are still in use. The latest tube, XL4, produced 75 MW at an efficiency of 47.5 percent. However, victory cannot be declared as yet, since an NLC prototype has not been fully designed and the decision between permanent magnet focusing and a super-conducting solenoid has not been formally made. Daryl Sprehn`s paper will present the status of the PPM klystron development. The authors believe that a PPM X-band source will work, at 50 as well as at 75 megawatts. But they are prepared to adapt the XL4 design to a super-conducting solenoid, should the PPM klystron develop unexpected problems. The SLAC program is now in its seventh year. It may well be the longest and most expensive microwave tube development on record, in a government laboratory or in industry. Direct and related costs for the total effort are probably of the order of $10 million. In these circumstances it is perhaps not surprising that it has been possible to produce a klystron with the performance of XL4. At the same time, it must be said that the necessary leap in technology from the SLAC 60-megawatt S-band production klystrons to a klystron of comparable performance at four times the frequency could not be realized without some very careful experimentation and, most importantly, without the infrastructure for tube fabrication and testing available at SLAC. The design of an 11.4 GHz 50--100 MW klystron, with microsecond pulses and a pulse repetition frequency of 180 Hz presents a number of technical challenges which are listed here.

Caryotakis, G.

1996-04-01

182

Wakefield measurements of SLAC linac structures at the Argonne AATF  

Microsoft Academic Search

Results are presented of measurements of both longitudinal and transverse wakefields performed at the Argonne National Laboratory Advanced Accelerator Test Facility with two SLAC-built X-band disk-loaded waveguides: a conventional 30-cavity long constant-impedance structure and a nonconventional 50-cavity long structure along which the iris and spacer diameters have been varied so as to stagger-tune the HEM 11 mode frequency by 37%.

J. W. Wang; G. A. Loew; J. Simpson; E. Chonjnacki; W. Gai; R. Konecny; P. Schoessow

1991-01-01

183

Progress report on the LCLS XFEL at SLAC  

Microsoft Academic Search

The Linac Coherent Light Source (LCLS) Project will be an x-ray free-electron laser. It is intended to produce pulses of 800-8,000 eV photons. Each pulse, produced with a repetition frequency of up to 120 Hz, will provide >1012 photons within a duration of less than 200 femtoseconds. The project employs the last kilometer of the SLAC linac to provide a

L F DiMauro; J Arthur; N Berrah; J Bozek; J N Galayda; J Hastings

2007-01-01

184

Latest Results in SLAC 75-MW PPM Klystrons  

SciTech Connect

75 MW X-band klystrons utilizing Periodic Permanent Magnet (PPM) focusing have been undergoing design, fabrication and testing at the Stanford Linear Accelerator Center (SLAC) for almost nine years. The klystron development has been geared toward realizing the necessary components for the construction of the Next Linear Collider (NLC). The PPM devices built to date which fit this class of operation consist of a variety of 50 MW and 75 MW devices constructed by SLAC, KEK (Tsukuba, Japan) and industry. All these tubes follow from the successful SLAC design of a 50 MW PPM klystron in 1996. In 2004 the latest two klystrons were constructed and tested with preliminary results reported at EPAC2004. The first of these two devices was tested to the full NLC specifications of 75 MW, 1.6 microseconds pulse length, and 120 Hz. This 14.4 kW average power operation came with a tube efficiency >50%. The most recent testing of these last two devices will be presented here. Design and manufacturing issues of the latest klystron, due to be tested by the Fall of 2005, are also discussed.

Sprehn, D.; Caryotakis, G.; Haase, A.; Jongewaard, E.; Laurent, L.; Pearson, C.; Phillips, R.; /SLAC

2006-03-06

185

Compliance of SLAC_s Laser Safety Program with OSHA Requirements for the Control of Hazardous Energy  

SciTech Connect

SLAC's COHE program requires compliance with OSHA Regulation 29CFR1910.147, 'The control of hazardous energy (lockout/tagout)'. This regulation specifies lockout/tagout requirements during service and maintenance of equipment in which the unexpected energization or start up of the equipment, or release of stored energy, could cause injury to workers. Class 3B and Class 4 laser radiation must be considered as hazardous energy (as well as electrical energy in associated equipment, and other non-beam energy hazards) in laser facilities, and therefore requires careful COHE consideration. This paper describes how COHE is achieved at SLAC to protect workers against unexpected Class 3B or Class 4 laser radiation, independent of whether the mode of operation is normal, service, or maintenance.

Woods, Michael; /SLAC

2009-01-15

186

NCI Summer Curriculum in  

Cancer.gov

This 4-week summer course provides specialized instruction in the principles and practice of cancer prevention and control. It focuses on concepts, methods, issues, and applications related to this field.

187

Focus on summer products  

Microsoft Academic Search

This summer season provides a selection of new products: a rabbit model for AIDS, a monoclonal antibody specific for the retinoblastoma gene product, and a reagent for keeping cell lines mycoplasma-free.

Diane Gershon

1989-01-01

188

Performance of the beam position monitor system for the SLAC PEP-II B factory  

SciTech Connect

The beam position monitor (BPM) system for the SLAC PEP-II B Factory was designed to measure the positions of single-bunch single-turn to multibunch multi-turn beams in both rings of the facility. Each BPM is based on four button-style pickups. At most locations the buttons are connected to provide single-axis information (x only or y only). Operating at a harmonic (952 MHz) of the bunch spacing, the BPM system combines broadband and narrowband capabilities and provides data at a high rate. The active electronics system is multiplexed for signals from the high-energy ring (HER) and low-energy ring (LER). The system will be briefly described; however, the main purpose of the present paper is to present operational results. The BPM system operated successfully during commissioning of the HER (primarily) and the LER over the past year. Results to be presented include on-line calibration, single-bunch single-turn resolution (<100 {mu}m), and multibunch multi-turn resolution (<3 {mu}m), multiplexing, and absolute calibration. Thus far, the system has met or exceeded all the requirements that have been tested. The remaining requirements will be tested when both rings are completed and commissioned this summer. In addition, typical results of beam physics studies relying on the BPM system will be presented.

Johnson, Ronald G.; Smith, Stephen R.; Aiello, G. Roberto [Stanford Linear Accelerator Center P.O. Box 4349, Stanford, California 94309 (United States)

1998-12-10

189

Under Summer Skies  

NSDL National Science Digital Library

Thereâs no better way to celebrate 2009, the International Year of Astronomy, than by curling up with a good book under summer skies. To every civilization, in every age, the skies inspired imagination and scientific inquiry. Thereâs no better place to start your summer reading than under their influence. Here are a few selections identified by NSTA Recommendsâ network of reviewers to help get you started.

Texley, Juliana

2009-07-01

190

Making Summer Count: How Summer Programs Can Boost Children's Learning  

ERIC Educational Resources Information Center

During summer vacation, many students lose knowledge and skills. By the end of summer, students perform, on average, one month behind where they left off in the spring. Participation in summer learning programs should mitigate learning loss and could even produce achievement gains. Indeed, educators and policymakers increasingly promote summer

McCombs, Jennifer Sloan; Augustine, Catherine; Schwartz, Heather; Bodilly, Susan; McInnis, Brian; Lichter, Dahlia; Cross, Amanda Brown

2012-01-01

191

78 FR 40755 - National Institute on Drug Abuse; Notice of Closed Meeting  

Federal Register 2010, 2011, 2012, 2013

...Institutes of Health National Institute on Drug Abuse; Notice of Closed Meeting Pursuant...Committee: National Institute on Drug Abuse Special Emphasis Panel; NIH Summer...Extramural Affairs, National Institute on Drug Abuse, NIH, DHHS, Room 4245, MSC...

2013-07-08

192

76 FR 15329 - National Institute on Drug Abuse; Notice of Closed Meeting  

Federal Register 2010, 2011, 2012, 2013

...Institutes of Health National Institute on Drug Abuse; Notice of Closed Meeting Pursuant...Committee: National Institute on Drug Abuse Special Emphasis Panel, R25 Summer...Extramural Affairs, National Institute on Drug Abuse, NIH, DHHS, Room 4238, MSC...

2011-03-21

193

78 FR 37835 - National Institute on Drug Abuse; Notice of Closed Meeting  

Federal Register 2010, 2011, 2012, 2013

...Institutes of Health National Institute on Drug Abuse; Notice of Closed Meeting Pursuant...Committee: National Institute on Drug Abuse Special Emphasis Panel; NIH Summer...Extramural Affairs, National Institute on Drug Abuse, NIH, DHHS, 6001 Executive...

2013-06-24

194

A Possible CO2 Conducting and Concentrating Mechanism in Plant Stomata SLAC1 Channel  

PubMed Central

Background The plant SLAC1 is a slow anion channel in the membrane of stomatal guard cells, which controls the turgor pressure in the aperture-defining guard cells, thereby regulating the exchange of water vapour and photosynthetic gases in response to environmental signals such as drought, high levels of carbon dioxide, and bacterial invasion. Recent study demonstrated that bicarbonate is a small-molecule activator of SLAC1. Higher CO2 and HCO3– concentration activates S-type anion channel currents in wild-type Arabidopsis guard cells. Based on the SLAC1 structure a theoretical model is derived to illustrate the activation of bicarbonate to SLAC1 channel. Meanwhile a possible CO2 conducting and concentrating mechanism of the SLAC1 is proposed. Methodology The homology structure of Arabidopsis thaliana SLAC1 (AtSLAC1) provides the structural basis for study of the conducting and concentrating mechanism of carbon dioxide in SLAC1 channels. The pKa values of ionizable amino acid side chains in AtSLAC1 are calculated using software PROPKA3.0, and the concentration of CO2 and anion HCO3– are computed based on the chemical equilibrium theory. Conclusions The AtSLAC1 is modeled as a five-region channel with different pH values. The top and bottom layers of channel are the alkaline residue-dominated regions, and in the middle of channel there is the acidic region surrounding acidic residues His332. The CO2 concentration is enhanced around 104 times by the pH difference between these regions, and CO2 is stored in the hydrophobic region, which is a CO2 pool. The pH driven CO2 conduction from outside to inside balances the back electromotive force and maintain the influx of anions (e.g. Cl– and NO3–) from inside to outside. SLAC1 may be a pathway providing CO2 for photosynthesis in the guard cells.

Du, Qi-Shi; Fan, Xina-Wei; Wang, Cheng-Hua; Huang, Ri-Bo

2011-01-01

195

NIH Quickfinder and NIH MedlinePlus Advisory Group - Spring - Summer 2010 | NIH MedlinePlus the Magazine  

MedlinePLUS

... Current Issue Past Issues NIH Quickfinder Past Issues / Spring - Summer 2010 Table of Contents For more information ... Institute of Arthritis and Musculoskeletal and Skin Diseases Spring / Summer 2010 Issue: Volume 5 Number 2 Page ...

196

New injector (NPI) for nuclear physics at SLAC  

SciTech Connect

A program of nuclear physics experiments has been approved at SLAC, and a new high average current injector is being added to the accelerator 650 meters upstream (Sector 25) of the accelerator output. The new injector (NPI) will produce beams in End Station A of up to 150 mA, 1.6 ..mu..sec, 180 pps at energies from 0.5 to 6 GeV. NPI will also have 1 nsec short pulse capability for electron injection into SSRL. Work on NPI started in October of 1983, and the first beam from the new injector is scheduled for the Fall of 1984.

Koontz, R.F.

1984-05-01

197

Experiments with very-high-power RF pulses at SLAC  

SciTech Connect

Experiments in which the powers of two SLAC klystrons were combined and fed into a resonant cavity pulse-compression system (SLED) are described. Pulse powers up to 65 MW into SLED were reached. The corresponding instantaneous peak power out of SLED was 390 MW. After normal initial aging, no persistent RF breakdown problems were encountered. X-radiation at the SLED cavities was generally less than 400 mR/h after aging. The theoretical relationship between x-radiation intensity and RF electric field strength is discussed.

Hogg, H.A.; Loew, G.A.; Price, V.G.

1983-03-01

198

Using the SLAC VHF and UHF radio systems  

SciTech Connect

The use of the SLAC VHF and UHF Radio Systems and the Tunnel Antenna Systems as they are presently configured is described. The original radio system was built in 1966 and has grown in scope over the years. The Tunnel Antenna Systems were developed for, and first installed in, the PEP ring, and later added to other tunnels and redesigned to cover the UHF range, as well as VHF. The UHF radio system was designed and built for SLC use, and was first used in the SLC Arcs. The three radio systems will be described and the capabilities of each system will be defined.

Struven, W.

1987-02-01

199

The polarized electron beam for the SLAC Linear Collider  

SciTech Connect

The SLAC Linear Collider has been colliding a polarized electron beam with an unpolarized positron beam at the Z{sup 0} resonance for the SLD experiment since 1992. An electron beam polarization of close to 80% has been achieved for the experiment at luminosities up to 8 {center_dot} 10{sup 29} cm{sup {minus}2} s{sup {minus}1}. This is the world`s first and only linear collider, and is a successful prototype for the next generation of high energy electron linear colliders. This paper discusses polarized beam operation for the SLC, and includes aspects of the polarized source, spin transport and polarimetry.

Woods, M.

1996-10-01

200

Neutron dosimetry at SLAC: Neutron sources and instrumentation  

SciTech Connect

This report summarizes in detail the dosimetric characteristics of the five radioisotopic type neutron sources ({sup 238}PuBe, {sup 252}Cf, {sup 238}PuB, {sup 238}PuF{sub 4}, and {sup 238}PuLi) and the neutron instrumentation (moderated BF{sub 3} detector, Anderson-Braun (AB) detector, AB remmeter, Victoreen 488 Neutron Survey Meter, Beam Shut-Off Ionization Chamber, {sup 12}C plastic scintillator detector, moderated indium foil detector, and moderated and bare TLDs) that are commonly used for neutron dosimetry at the Stanford Linear Accelerator Center (SLAC). 36 refs,. 19 figs.

Liu, J.C.; Jenkins, T.M.; McCall, R.C.; Ipe, N.E.

1991-10-01

201

Summer programming in rural communities: unique challenges.  

PubMed

During the past several decades, child poverty rates have been higher in rural than in urban areas, and now 2.5 million children live in deep poverty in rural America. Studies indicate that poor children are most affected by the typical "summer slide." Summer programming has the ability to address the issues of academic loss, nutritional loss, and the lack of safe and constructive enrichment activities. However, poor rural communities face three major challenges in implementing summer programming: community resources, human capital, and accessibility. The success of Energy Express, a statewide award-winning six-week summer reading and nutrition program in West Virginia, documents strategies for overcoming the challenges faced by poor, rural communities in providing summer programs. Energy Express (1) uses community collaboration to augment resources and develop community ownership, (2) builds human capital and reverses the acknowledged brain drain by engaging college students and community volunteers in meaningful service, and (3) increases accessibility through creative transportation strategies. West Virginia University Extension Service, the outreach arm of the land-grant institution, partners with AmeriCorps, a national service program, and various state and local agencies and organizations to implement a program that produces robust results. PMID:17623413

Phillips, Ruthellen; Harper, Stacey; Gamble, Susan

2007-01-01

202

Shell Creek Summers  

NSDL National Science Digital Library

What would motivate high school students to donate valuable summer vacation time to do science research?--the opportunity to make a difference! The Shell Creek Watershed Improvement Group (SCWIG) was formed to identify and promote needed conservation practices within a local watershed, and turned to the high school science department to help educate the public on water quality in the watershed and to establish a monitoring system that would be used to improve surface and groundwater quality. Since 2002, for the past three summers, in this ongoing project, students collect water quality data and report their findings to the three involved community organizations.

Seier, Mark; Goedeken, Suzy

2005-04-01

203

High voltage pulse cable and connector experience in the kicker systems at SLAC.  

National Technical Information Service (NTIS)

The SLAC 2-mile linear accelerator uses a wide variety of pulse kicker systems that require high voltage cable and connectors to deliver pulses from the drivers to the magnet loads. Many of the drivers in the SLAC kicker systems use cable lengths up to 80...

K. Harris M. Artusy A. Donaldson T. Mattison

1991-01-01

204

The status of the SLAC Linear Collider and of the Mark II detector  

Microsoft Academic Search

At SLAC we are currently involved in the exciting challenge of commissioning the first example of a new type of colliding beam accelerator, the SLAC Linear Collider, or SLC. The goals of the SLC are two-fold. It will explore the concept of linear colliders, and it will allow the study of physics on the Z° resonance. It accomplishes these goals

1987-01-01

205

High voltage pulse cable and connector experience in the kicker systems at SLAC  

Microsoft Academic Search

The SLAC (Stanford Linear Accelerator Center) 2-mile linear accelerator uses a wide variety of pulse kicker systems that require high voltage cable and connectors to deliver pulses from the drivers to the magnet loads. Many of the drivers in the SLAC kicker systems use cable lengths up to 80 ft and are required to deliver pulses of up to 40

K. Harris; M. Artusy; A. Donaldson; T. Mattison

1991-01-01

206

Recording PEP2 Ring Beam Losses at SLAC  

SciTech Connect

The PEP2 (e+)(e-) storage rings contain many complex interrelated systems. When the beam aborts, examining a record of the orbit from the time just before the abort can help identify the root cause. At the Stanford Linear Accelerator Center (SLAC) a system has been developed to continuously record beam orbits from Beam Position Monitors (BPMS) into a circular buffer. When the beam is aborted the buffers are frozen and their contents are stored for later analysis. BPM orbits are saved on a turn by turn basis for 2800 turns in both the high energy ring (HER) and the low energy ring (LER). Each BPM Processor (BPMP) can either monitor the HER or the LER, but not both as the readout of the two rings is multiplexed into a single readout channel. Tools exist as part of the SLAC Control Program (SCP) to collect, display, and save the data. A physicist or operator can choose a few BPMS in which to view all 2800 turns to identify the turn in which the beam went awry; then ask for that specific orbit from all of the BPMS in the storage ring to determine the root cause of the abort.

Zelazny, M.; Gromme, T.; Himel, T.; Hendrickson, L.; Krauter, K.; /SLAC

2005-09-30

207

Self-modulation of long SLAC particle bunches  

NASA Astrophysics Data System (ADS)

The transverse self-modulation of ultra-relativistic particle bunches provides a path to the generation of large amplitude wakefields using long drivers [1]. In this work we show that the long electron or positron bunches that are available at SLAC could be used to demonstrate this mechanism. One-to-one OSIRIS simulations were performed in conditions that mimic the propagation of the electron beam available at SLAC in 1 meter long plasmas. The simulations showed that the transverse self-modulation of the electron beam occurs, and that this can lead to the generation of accelerating gradients in excess of 60 GeV/m. As a result, some of the beam electrons gained more than 5 GeV after one meter of propagation. The possibility to seed the transverse self-modulation instability with the initial wake provided by hard cut beams is also examined. In this case, the simulations revealed that stable accelerating gradients exceeding 10 GeV/m over the whole plasma length could be achieved. The asymmetries associated with the transverse self-modulation of electrons and positron beams were also explored.[4pt] [1] N. Kumar et al, Phys. Rev. Lett. 104, 255003 (2010).

Muggli, Patric; Vieira, Jorge; Silva, Luis

2011-11-01

208

Results of the Energy Doubler Experiment at SLAC  

SciTech Connect

The costs and the time scales of colliders intended to reach the energy frontier are such that it is important to explore new methods of accelerating particles to high energies. Plasma-based accelerators are particularly attractive because they are capable of producing accelerating fields that are orders of magnitude larger than those used in conventional colliders. In these accelerators a drive beam, either laser or particle, produces a plasma wave (wakefield) that accelerates charged particles. The ultimate utility of plasma accelerators will depend on sustaining ultra-high accelerating fields over a substantial length to achieve a significant energy gain. More than 42 GeV energy gain was achieved in an 85 cm long plasma wakefield accelerator driven by a 42 GeV electron drive beam at the Stanford Linear Accelerator Center (SLAC). Most of the beam electrons lose energy to the plasma wave, but some electrons in the back of the same beam pulse are accelerated with a field of {approx}52 GV/m. This effectively doubles their energy, producing the energy gain of the 3 km long SLAC accelerator in less than a metre for a small fraction of the electrons in the injected bunch.

Blumenfeld, I.; Decker, F.J.; Hogan, M.J.; Ischebeck, R.; Iverson, R.H.; Kirby, N.A.; Siemann, Robert H.; Walz, D.R.; /SLAC; Clayton, C.E.; Huang, C.; Joshi, C.; Lu, W.; Marsh, K.A.; Mori, W.B.; Zhou, M.; /UCLA; Katsouleas, Thomas C.; Muggli, P.; Oz, E.; /Southern California U.

2009-06-15

209

Development of X-band klystron technology at SLAC  

SciTech Connect

The SLAC design for a 1-TeV collider (NLC) requires klystrons with a performance which is well beyond the state-of-the-art for microwave tubes in the United States or abroad. The electrical specifications for the NLC klystrons are not fully established, but they are approximately as follows: Frequency, 11.4 GHz; Peak Power, 75 MW; Pulse Length, 1.5 {mu}s; Repetition Rate, 180 Hz; Gain, 50 dB; Efficiency, (including beam focusing) 50%. SLAC is in the seventh year of a program to develop these klystrons. The choice of X-band as the operating frequency, along with the sheer size of the NLC, have resulted in some new, most demanding standards for the klystrons which may power this future machine. These are related to the overall efficiency required, to the high rf gradients that must be supported at the output circuit without vacuum breakdown, and to the manufacturing cost of the 5,000-10,000 klystrons needed for the collider.

Caryotakis, G.

1997-05-01

210

Books for Summer Reading.  

ERIC Educational Resources Information Center

|For educators' summer reading enjoyment, "Kappan" editors recommend three books on nature (Robert Richardson's biography "Emerson: The Mind on Fire, William Cronin's edited book "Uncommon Ground: Rethinking the Human Place in Nature," and Gary Snyder's poetry volume "Mountain and Rivers Without End"). Also recommended are three culturally diverse…

Phi Delta Kappan, 1997

1997-01-01

211

Best New Summer Books  

ERIC Educational Resources Information Center

|When a colleague and friend gives you a new kids' book and says, "You have to read this," you pay attention. That's why the author asked a team of top teachers and librarians to share new favorites for summer. Here are their picks for every reader, each bearing a teachers' stamp of approval.|

Trierweiler, Hannah; Cleaver, Samantha

2007-01-01

212

Mississippi Freedom Summer Project  

NSDL National Science Digital Library

The Mississippi Freedom Summer Project website, from Miami University of Ohio, documents the history of 1964's "Freedom Summer", which was when volunteers gathered at the former Western College for Women in order to be trained to register African-American voters in Mississippi. Three volunteers were subsequently murdered in Mississippi, and "these events called attention to racial inequality and served as a catalyst for change." The collection was created by a grant from the Ohio Humanities Council, the Miami University Libraries, and a generous grant from Catherine Ross-Loveland, a 1952 graduate of the Western College for Women. The materials here include over 765 documents related to the Freedom Summer, including reports from the FBI about those involved with the activities around this form of civil rights activism and articles from the Ohio press about the civil rights movement in the South during that time. There are also 27 videos here from conversations and tours held on campus in 2004 to commemorate the 40th anniversary of the Freedom Summer. The videos include walking tours of the Western College for Women and panel discussions about faith and activism. Overall, it's a tremendous collection and one that merits several visits.

213

2008 AAPM Summer School  

Cancer.gov

June 25, 2008 12:00 AM - June 27, 2008 12:00 AM Edwin Hornberger Conference Center Houston, TX + Add to Outlook Calendar The Physics and Applications of PET/CT Imaging Print This Page 2008 AAPM Summer School News & Events

214

Bright Beginnings: Summer Kindergarten.  

ERIC Educational Resources Information Center

|The summer kindergarten program described in this guide is designed to meet the needs of children according to their stages of development and experience. The curriculum grows out of children's interests, learning styles, strengths, and stages of development. Direct experiences though which children can explore and discover constitute the core of…

New York City Board of Education, Brooklyn, NY. Div. of Curriculum and Instruction.

215

My Summer Vacation  

ERIC Educational Resources Information Center

|In this article, a science teacher from the Midwest reflects on her summer vacation to the Gulf of Mexico. She felt that this vacation would help improve her teaching about the environmental problems in the gulf and elsewhere. After all, anyone can show photos of oil-laden birds and dead sea turtles and read news clips of a distant place, but to…

Galus, Pamela

2010-01-01

216

Books for Summer Reading.  

ERIC Educational Resources Information Center

|To help replenish educators' supply of ideas, "Kappan" editors suggest several books for summer reading, including many noncurrent titles not specifically on education such as Peter Novick's "That Noble Dream," Joy Kogawa's "Obasan," Zora Neale Hurston's "Their Eyes Were Watching God," Kate Chopin's "The Awakening," Willa Cather's "My Antonia,"…

Phi Delta Kappan, 1991

1991-01-01

217

Active Healthy Summer  

ERIC Educational Resources Information Center

|Summer break is almost here for most elementary teachers and students. Warmer weather and additional free time to make choices create more opportunities to be physically active, whether home alone or out with friends and family. This article describes ways by which physical education specialists can encourage students' physical activity by…

Elliott, Eloise

2005-01-01

218

Summer Reading That Inspires  

ERIC Educational Resources Information Center

|Why did you decide on science as a career? For many, it was the inspiration of a mentor or model--an explorer who could communicate excitement and a sense of adventure to others. During the school year, teachers take on that role of motivator for students. But as they recharge over summer break, it is great to treat themselves again to the…

Texley, Juliana

2012-01-01

219

Books for Summer Reading.  

ERIC Educational Resources Information Center

Teachers and education professors suggest various nonfiction and fiction books for summer reading enjoyment, from Robert Putnam's "Bowling Alone," C.A. Bowers's "Let Them Eat Data," and Larry McMurtry's "Roads: Driving America's Great Highways" to Kent Hauf's "Plainsong, J.M. Coetzee's "Disgrace," and Michael Cunningham's "The Hours." (MLH)

[Editors

2001-01-01

220

Summer Fish Camp.  

ERIC Educational Resources Information Center

|The booklet presents a description and illustrates, with photographs, the Eskimo lifestyle and the kinds of activities that occur at a summer fish camp on the Yukon River. Eleven suggested activities are listed for the teacher to present when using the booklet. Activities include studying the map of Alaska; tracing the life cycle of the fish;…

Remick, Dennis; Pulu, Tupou L.

221

Superheroes and Summer Reading.  

ERIC Educational Resources Information Center

|To combat summer learning loss among remedial readers, teachers and consultants in the Omaha, Nebraska, Title I program designed a series of comic-book reading units and mailed them to students' homes. Parents were pleased with the project and it appeared that less reading skill had been lost by September. (SJL)|

Meyer, Ron; Buckner, Joyce

1980-01-01

222

Use Your Summer Wisely  

ERIC Educational Resources Information Center

Academics welcome summer with a collective sigh of relief. Finally they can get to those tasks that are nearly impossible to accomplish during a busy academic year: working on that manuscript, completing the revisions on an article, learning the new laboratory technique from the colleague across the hall. However, those going on the job market in…

Vick, Julie Miller; Furlong, Jennifer S.

2007-01-01

223

Consulting to summer camps.  

PubMed

There has been an increased need for consultation to summer camps from the allied health/mental health fields because camps are available to children with medical and psychological illnesses. Factors in camp programs that are necessary for effective consultation and the various roles a consultant may serve within the camp community are discussed in this article. PMID:17823057

Ditter, Bob

2007-10-01

224

Superheroes and Summer Reading.  

ERIC Educational Resources Information Center

To combat summer learning loss among remedial readers, teachers and consultants in the Omaha, Nebraska, Title I program designed a series of comic-book reading units and mailed them to students' homes. Parents were pleased with the project and it appeared that less reading skill had been lost by September. (SJL)

Meyer, Ron; Buckner, Joyce

1980-01-01

225

Books for Summer Reading  

ERIC Educational Resources Information Center

In this article, the author, Roger Soder, discusses past books he has read throughout the year on his own and with his book club. He also makes suggestions for summer reading selections. He thanks valued and nearby colleagues and friends for blessing him with books of great wisdom throughout the year.

Soder, Roger

2004-01-01

226

Development of X-Band Klystron Technology at SLAC  

NASA Astrophysics Data System (ADS)

The SLAC design for a 1-TeV collider (NLC) requires klystrons with a performance which is well beyond the state-of-the-art for microwave tubes in the United States or abroad. SLAC is in the seventh year of a program to develop these klystrons. A number of difficult technical issues had to be addressed, in order to satisfy the NLC requirement for very high peak power at X-band, together with good efficiency, excellent reliability and low acquisition cost. The electrical specifications for the NLC klystrons are not fully established, but they are approximately as follows: Frequency: 11.4 GHz Peak Power: 75 MW Pulse length: 1.5 microseconds Repetition rate: 180 pps Gain: 50 dB Efficiency: 50% (total, including beam focusing) The 100+ joules in the rf output pulses, together with the high frequency, call for the use of extended interaction output circuits, instead of simple resonant cavities. The efficiency requirement, deriving from the necessity to minimize operating costs for the collider, precludes use of solenoids for beam confinement. It was necessary to develop periodic permanent magnet focusing (PPM) for this klystron. Once again, the beam pulse energies, coupled to the small dimensions of drift tubes and cavities require near-perfect beam optics. In addition to designing for the above parameters, SLAC engineers are also planning for the changes which will be necessary in order for the prototype klystron to be transferred to industry and produced in quantity (and for substantially reduced cost). The NLC will require a factory producing klystrons at the rate of about 1000/year, for an initial complement of about 10,000 klystrons, and for replacements. A paper design of such a factory is part of the NLC klystron development program. The latest test results of a 50-MW PPM-focused klystron built in May 1996 will be presented, along with the design of the 75-MW prototype and plans for its low-cost factory-produced version. .

Caryotakis, George

1997-05-01

227

Nordic Volcanological Institute  

NSDL National Science Digital Library

The Nordic Volcanological Institute was created by a group of Nordic scientists who sought to increase earth science knowledge by exploring active volcanism and tectonics of Iceland. Researchers can find lengthy lists of publications and find out about upcoming seminars. Students and teachers can obtain colorful, educational materials on the geology, volcanoes, eruptions, and earthquakes of Iceland. The site presents detailed information on the Institute's facilities, summer school programs, and its research in geochemistry and geophysics. Although the Geodesy link is only in Icelandic, all of the other interesting materials are written in English.

228

Summer Thunderstorms over Southern California.  

National Technical Information Service (NTIS)

Ten-day fire weather records from forestry lookouts in the southern California mountains are used to describe summer thunderstorm activity. The distribution of thunderstorms during a typical season closely resembles rainy-day frequencies for summer precip...

A. M. Tubbs

1972-01-01

229

LP Past Summer Student Images  

Cancer.gov

D  CCR Home   About CCR   CCR Intranet        Laboratory of Pathology LP Home Clinical Services Basic Sciences Training LP Staff Accessibility of Web Site LP Past Summer Student Images Coming Soon Back to Summer Student Home About CCR | Clinical

230

Summer by the Book  

NSDL National Science Digital Library

By June, most teachers are more than ready to leave the classroom routine, but they are seldom able to leave their love of science behind. They travel, explore, and read, so that they can return in the fall better prepared to share science with students. Through reading, a teacher can spend valuable hours updating content background and methods, or simply refreshing the spirit. So, if your summer plans include some stimulating reading, look no further.

Texley, Juliana

2004-07-01

231

First operation of the upgraded SLAC A-Line  

SciTech Connect

The SLAC A-Line has been upgraded to transport electrons to fixed target experiments in End Station A (ESA) with energies up to 50 GeV. From September through November, 1995, this beam line was commissioned and used to deliver 48.36 GeV polarized electrons to Experiment E-154 at 120 pulses/sec and up to 10{sup 11} e{sup {minus}}/pulse. The beam had a full width momentum spread of less than 0.5 percent, and was focused to a small spot ({sigma}=0.7 mm) at the target. In this paper the authors describe the first operational experience with this new beam line.

Erickson, R.; Anderson, S.; Baker, A. [and others

1996-10-01

232

The ILC Marx Modulator Development Program at SLAC  

SciTech Connect

The International Linear Collider [ILC] baseline design requires 576 L-band klystron stations, each supplying 10MW peak RF power to the accelerating structures. Each klystron requires a modulator capable of delivering 120kV, 140A 1.6ms pulses, at 5Hz. Solid-state Marx modulator topologies are rapidly becoming feasible with the advent of PC-board-level 4500V IGBTs, fast single junction HV diodes, high density capacitors, and sophisticated modeling software. Making full use of recent technology advances, the ILC Marx Modulator program at SLAC plans to pursue a 120kV solid-state Marx design, which appears to offer significantly higher efficiency, availability, and cost savings than existing modulator options.

Leyh, G.E.; /SLAC

2005-06-07

233

The development of the Next Linear Collider at SLAC  

SciTech Connect

At SLAC, we are pursuing the design of a Next Linear Collider (NLC) which would begin with a center-of-mass energy of 0.5 TeV and be upgradable to at least 1.0 TeV, and possibly 1.5 TeV. The luminosity is designed to be 10{sup 33} cm{sup {minus}2}s{sup {minus}1} at the lower energy and 10{sup 34} cm{sup {minus}2}s{sup {minus}1} at the top energy. In this paper, we discuss the accelerator physics issues which are important in our approach, and also the present state of the technology development. We also review the impact that the SLC has had in the evolution of our basic approach.

Ruth, R.D.

1992-02-01

234

Phase Noise Characterization of the Main Drive Line at SLAC  

SciTech Connect

The phase noise of the Main Drive Line (MDL) at the Stanford Linear Accelerator Center is extremely important to the operation of the linac since the MDL provides the radio frequency (RF) drive and phase reference for the entire accelerator system. In order to ensure that the Linac Coherent Light Source (LCLS) can be run using current MDL components, the phase noise of the MDL had to be ascertained. This was determined using an ultra-stable reference oscillator phase-locked to the MDL. Using this device, the phase noise was determined to be far greater than LCLS requires. This suggests that an improved Master Oscillator needs to be obtained in order to be able to run LCLS on the SLAC linac.

Fustin, Drew

2002-08-26

235

Two-klystron Binary Pulse Compression at SLAC  

SciTech Connect

The Binary Pulse Compression system installed at SLAC was tested using two klystrons, one with 10 MW and the other with 34 MW output. By compressing 560 ns klystron pulses into 70 ns, the measured BPC output was 175 MW, limited by the available power from the two klystrons. This output was used to provide 100-MW input to a 30-cell X-band structure in which a 100-MV/m gradient was obtained. This system, using the higher klystron outputs expected in the future has the potential to deliver the 350 MW needed to obtain 100 MV/m gradients in the 1.8-m NLC prototype structure. This note describes the timing, triggering, and phase coding used in the two-klystron experiment, and the expected and measured net-work response to three- or two-stage modulation.

Farkas, Z.D.; Lavine, T.L.; Menegat, A.; Vlieks, A.E.; Wang, J.W.; Wilson, P.B.

1993-04-01

236

Electron Bunch Length Measurement for LCLS at SLAC  

SciTech Connect

At Stanford Linear Accelerator Center (SLAC) a Bunch Length Measurement system has been developed to measure the length of the electron bunch for its new Linac Coherent Light Source (LCLS). This destructive measurement uses a transverse-mounted RF deflector (TCAV) to vertically streak the electron beam and an image taken with an insertable screen and a camera. The device control software was implemented with the Experimental Physics and Industrial Control System (EPICS) toolkit. The analysis software was implemented in Matlab{trademark} using the EPICS/Channel Access Interface for Scilab{trademark} and Matlab{trademark} (labCA). This architecture allowed engineers and physicists to develop and integrate their control and analysis without duplication of effort.

Zelazny, M.; Allison, S.; Chevtsov, Sergei; Emma, P.; Kotturi, K.d.; Loos, H.; Peng, S.; Rogind, D.; Straumann, T.; /SLAC

2007-10-04

237

SLAC modulator operation and reliability in the SLC Era  

SciTech Connect

A discussion of the operation and reliability of the 244 modulators in the SLAC linac with an emphasis on the past three years of operation. The linac modulators were designed and built in the 60's, upgraded for the SLAC Linear Collider (SLC) in the mid 80s, and despite their age are still reliable accelerator components. The 60s modulator operated at 65 MW peak and 83 kW average power. The upgrade resulted in 150 MW peak output at an average power of 87 kW, a modest increase since the repetition rate was dropped from 360 to 120 Hz. In the present accelerator configuration, the Linac operates as a source of electrons and positrons to a single pass coillider. The classic collider is a storage ring filled with oppositely charged, counter-rotating particles which are allowed to collide until an accelerator fault occurs and the stored beams are aborted. A reasonable storage ring can store and collide particles for as long as eight hours with a 10 or 20 minute filling time. A single pass collider, + on the other hand, can only produce e{sup {minus}} and e{sup +} collisions at whatever rate the source operates. To be effective the SLC must operate at 120 Hz with a very high degree of reliability and on a continuous basis. Fortunately, the linac has a modest excess of modulator/klystron systems which allows some measure of redundancy and hence some freedom from the constraint that all 244 modulator/klystrons operate simultaneously. Nonetheless, high importance is placed on modulator MTBF and MTRR or, in the parlance of reliability experts and accelerator physicists, availability. This is especially true of the modulators associated with the fundamental requirements of a collider such as injection, compression and positron production.

Donaldson, A.R.; Ashton, J.R.

1992-06-01

238

SLAC modulator operation and reliability in the SLC Era  

SciTech Connect

A discussion of the operation and reliability of the 244 modulators in the SLAC linac with an emphasis on the past three years of operation. The linac modulators were designed and built in the 60`s, upgraded for the SLAC Linear Collider (SLC) in the mid 80s, and despite their age are still reliable accelerator components. The 60s modulator operated at 65 MW peak and 83 kW average power. The upgrade resulted in 150 MW peak output at an average power of 87 kW, a modest increase since the repetition rate was dropped from 360 to 120 Hz. In the present accelerator configuration, the Linac operates as a source of electrons and positrons to a single pass coillider. The classic collider is a storage ring filled with oppositely charged, counter-rotating particles which are allowed to collide until an accelerator fault occurs and the stored beams are aborted. A reasonable storage ring can store and collide particles for as long as eight hours with a 10 or 20 minute filling time. A single pass collider, + on the other hand, can only produce e{sup {minus}} and e{sup +} collisions at whatever rate the source operates. To be effective the SLC must operate at 120 Hz with a very high degree of reliability and on a continuous basis. Fortunately, the linac has a modest excess of modulator/klystron systems which allows some measure of redundancy and hence some freedom from the constraint that all 244 modulator/klystrons operate simultaneously. Nonetheless, high importance is placed on modulator MTBF and MTRR or, in the parlance of reliability experts and accelerator physicists, availability. This is especially true of the modulators associated with the fundamental requirements of a collider such as injection, compression and positron production.

Donaldson, A.R.; Ashton, J.R.

1992-06-01

239

Results of the SLAC LCLS Gun High-Power RF Tests.  

National Technical Information Service (NTIS)

The beam quality and operational requirements for the Linac Coherent Light Source (LCLS) currently being constructed at SLAC are exceptional, requiring the design of a new RF photocathode gun for the electron source. Based on operational experience at SLA...

C. Limborg-Deprey D. H. Dowell E. Jongewaard J. Schmerge Z. Li

2007-01-01

240

Homologue Structure of the SLAC1 Anion Channel for Closing Stomata in Leaves  

SciTech Connect

The plant SLAC1 anion channel controls turgor pressure in the aperture-defining guard cells of plant stomata, thereby regulating the exchange of water vapour and photosynthetic gases in response to environmental signals such as drought or high levels of carbon dioxide. Here we determine the crystal structure of a bacterial homologue (Haemophilus influenzae) of SLAC1 at 1.20 {angstrom} resolution, and use structure-inspired mutagenesis to analyse the conductance properties of SLAC1 channels. SLAC1 is a symmetrical trimer composed from quasi-symmetrical subunits, each having ten transmembrane helices arranged from helical hairpin pairs to form a central five-helix transmembrane pore that is gated by an extremely conserved phenylalanine residue. Conformational features indicate a mechanism for control of gating by kinase activation, and electrostatic features of the pore coupled with electrophysiological characteristics indicate that selectivity among different anions is largely a function of the energetic cost of ion dehydration.

Y Chen; L Hu; M Punta; R Bruni; B Hillerich; B Kloss; B Rost; J Love; S Siegelbaum; W Hendrickson

2011-12-31

241

A River Summer on the Hudson  

NASA Astrophysics Data System (ADS)

River Summer is a month-long faculty development program extending from the continental shelf off New York City to the headwaters of the Hudson in the Adirondack Mountains. During the program, faculty from the Environmental Consortium of Hudson Valley Colleges and Universities teach each other about the Hudson environment, using innovative methods of teaching and learning, with a focus on incorporation of hands-on approaches from the perspective of multiple disciplines. Over four weeks, faculty from research universities, community colleges, liberal arts institutions, and middle and high schools work and live together, on board a research vessel or in a remote tent campsite, for several days at a time. Using the geology, hydrology, and landscape of the River as a foundation, River Summer focuses on understanding development of the Hudson within the context of its natural resources and cultural history. Participants conduct field sampling and analyses and consider issues through approaches that are common to many disciplines: scaling for problem solving; sampling and assessing bias and representation; observing and documenting; representing and depicting; interpretation and assessing relationships and causality; and evaluation. They also get a chance to experience, first-hand, the complexity and often open-ended nature of doing science. By allowing individuals, many of whom come from non-science disciplines, to experience these methods and processes in a safe learning environment, science is made more meaningful and accessible. The program's pedagogy is based on the principles of cognitive psychology and immersive field-, place- and inquiry-based learning. Field programs have been found to provide memorable, transformative experiences for undergraduate students, and our experience with River Summer 2005 and 2006 suggests they are equally effective with faculty. Evaluation shows that River Summer has a significant impact on its participants. Participants develop new inter-institutional collaborations, and interdisciplinary pedagogical and research approaches that would otherwise never have happened. River Summer content and pedagogy are being used by participants to transform their teaching at their home institutions in disciplines as diverse as anthropology, art history, biology, economics, engineering, geochemistry, political science, and writing. Using local resources and landscapes develops an understanding of the environment in which one works and lives, providing greater accessibility and deeper meaning. Proximity to the areas being studied also allows them to be developed into class field trips. The enthusiasm and energy that the project evokes suggests that the model developed for this program could be successfully implemented in other settings to promote interdisciplinary learning about the earth and its environment.

Kenna, T. C.; Pfirman, S.; Selleck, B.; Son, L.; Land, M.; Cronin, J.

2006-12-01

242

77 FR 65896 - National Institute of Neurological Disorders and Stroke; Notice of Closed Meetings  

Federal Register 2010, 2011, 2012, 2013

...Institute of Neurological Disorders and Stroke; Notice of Closed Meetings Pursuant to...Institute of Neurological Disorders and Stroke Special Emphasis Panel; Joint T32. Date...Institute of Neurological Disorders and Stroke Special Emphasis Panel; Summer...

2012-10-31

243

77 FR 64527 - National Institute of Mental Health; Notice of Closed Meetings  

Federal Register 2010, 2011, 2012, 2013

...of Health National Institute of Mental Health; Notice of Closed Meetings Pursuant...Committee: National Institute of Mental Health Special Emphasis Panel, NIH Summer...Activities, National Institute of Mental Health, NIH, Neuroscience...

2012-10-22

244

76 FR 60508 - National Institute of Mental Health Notice of Closed Meetings  

Federal Register 2010, 2011, 2012, 2013

...of Health National Institute of Mental Health Notice of Closed Meetings Pursuant...Committee: National Institute of Mental Health Special Emphasis Panel; NIH Summer...Activities, National Institute of Mental Health, NIH, Neuroscience...

2011-09-29

245

77 FR 64119 - National Institute of Mental Health; Notice of Closed Meetings  

Federal Register 2010, 2011, 2012, 2013

...of Health National Institute of Mental Health; Notice of Closed Meetings Pursuant...Committee: National Institute of Mental Health Special Emphasis Panel; NIH Summer...Activities, National Institute of Mental Health, NIH, Neuroscience...

2012-10-18

246

78 FR 39299 - National Institute of Mental Health; Notice of Closed Meetings  

Federal Register 2010, 2011, 2012, 2013

...of Health National Institute of Mental Health; Notice of Closed Meetings Pursuant...Committee: National Institute of Mental Health Special Emphasis Panel; NIH Summer...Activities, National Institute of Mental Health, NIH, Neuroscience...

2013-07-01

247

Setup and Calibration of SLAC's Peripheral Monitoring Stations  

SciTech Connect

The goals of this project were to troubleshoot, repair, calibrate, and establish documentation regarding SLAC's (Stanford Linear Accelerator Center's) PMS (Peripheral Monitoring Station) system. The PMS system consists of seven PMSs that continuously monitor skyshine (neutron and photon) radiation levels in SLAC's environment. Each PMS consists of a boron trifluoride (BF{sub 3}) neutron detector (model RS-P1-0802-104 or NW-G-20-12) and a Geiger Moeller (GM) gamma ray detector (model TGM N107 or LND 719) together with their respective electronics. Electronics for each detector are housed in Nuclear Instrument Modules (NIMs) and are plugged into a NIM bin in the station. All communication lines from the stations to the Main Control Center (MCC) were tested prior to troubleshooting. To test communication with MCC, a pulse generator (Systron Donner model 100C) was connected to each channel in the PMS and data at MCC was checked for consistency. If MCC displayed no data, the communication cables to MCC or the CAMAC (Computer Automated Measurement and Control) crates were in need of repair. If MCC did display data, then it was known that the communication lines were intact. All electronics from each station were brought into the lab for troubleshooting. Troubleshooting usually consisted of connecting an oscilloscope or scaler (Ortec model 871 or 775) at different points in the circuit of each detector to record simulated pulses produced by a pulse generator; the input and output pulses were compared to establish the location of any problems in the circuit. Once any problems were isolated, repairs were done accordingly. The detectors and electronics were then calibrated in the field using radioactive sources. Calibration is a process that determines the response of the detector. Detector response is defined as the ratio of the number of counts per minute interpreted by the detector to the amount of dose equivalent rate (in mrem per hour, either calculated or measured). Detector response for both detectors is dependent upon the energy of the incident radiation; this trend had to be accounted for in the calibration of the BF{sub 3} detector. Energy dependence did not have to be taken into consideration when calibrating the GM detectors since GM detector response is only dependent on radiation energy below 100 keV; SLAC only produces a spectrum of gamma radiation above 100 keV. For the GM detector, calibration consisted of bringing a {sup 137}Cs source and a NIST-calibrated RADCAL Radiation Monitor Controller (model 9010) out to the field; the absolute dose rate was determined by the RADCAL device while simultaneously irradiating the GM detector to obtain a scaler reading corresponding to counts per minute. Detector response was then calculated. Calibration of the BF{sub 3} detector was done using NIST certified neutron sources of known emission rates and energies. Five neutron sources ({sup 238}PuBe, {sup 238}PuB, {sup 238}PuF4, {sup 238}PuLi and {sup 252}Cf) with different energies were used to account for the energy dependence of the response. The actual neutron dose rate was calculated by date-correcting NIST source data and considering the direct dose rate and scattered dose rate. Once the total dose rate (sum of the direct and scattered dose rates) was known, the response vs. energy curve was plotted. The first station calibrated (PMS6) was calibrated with these five neutron sources; all subsequent stations were calibrated with one neutron source and the energy dependence was assumed to be the same.

Cooper, C.

2004-09-03

248

Acceleration of high charge density electron beams in the SLAC linac  

SciTech Connect

The SLAC Linear Collider (SLC) will require both electron and positron beams of very high charge density and low emittance to be accelerated to about 50 GeV in the SLAC 3-km linac. The linac is in the process of being improved to meet this requirement. The program to accelerate an electron beam of high charge density through the first third of the SLC linac is described and the experimental results are discussed. 7 references, 5 figures.

Sheppard, J.C.; Clendenin, J.E.; Jobe, R.K.; Lueth, V.G.; Millich, A.; Ross, M.C.; Seeman, J.T.; Stiening, R.F.

1984-01-01

249

Design of a semi-custom integrated circuit for the SLAC SLC timing control system  

SciTech Connect

A semi-custom (gate array) integrated circuit has been designed for use in the SLAC Linear Collider timing and control system. The design process and SLAC's experiences during the phases of the design cycle are described. Issues concerning the partitioning of the design into semi-custom and standard components are discussed. Functional descriptions of the semi-custom integrated circuit and the timing module in which it is used are given.

Linstadt, E.

1984-10-01

250

Experimental Tests of the GDH and Other Sum Rules at SLAC  

SciTech Connect

Recent measurements from SLAC of the polarized nucleon structure functions g{sub 1} and g{sub 2} have been used to experimentally test the Bjorken, Ellis-Jaffe, Burkhardt-Cottingham, and Efremov-Leader-Teryaev sum rules. In the future, the SLAC E159 experiment will extend structure function measurements using real photons to 40 GeV, enabling a definitive test of the high energy convergence of the GDH sum rule for both proton and deuteron targets.

Bosted, P.E.; /Massachusetts U., Amherst

2005-06-14

251

NIH Summer Handbook.  

National Technical Information Service (NTIS)

This handbook is for those individuals who are new to NIH. It provides information about the Institutes and Centers of the NIH and the activities and contacts useful to persons unfamiliar with the agency. It is an invaluable tool for new students.

2008-01-01

252

Measurements of the neutron polarized structure function at SLAC  

SciTech Connect

Detailed measurements of unpolarized or spin-averaged nucleon structure functions over the past two decades have led to detailed knowledge of the nucleon`s internal momentum distribution. Polarized nucleon structure function measurements, which probe the nucleon`s internal spin distribution, started at SLAC in 1976. E-142 has recently measured the neutron polarized structure function g{sub 1}{sup n}(x) over the range 0.03 {le} {times} {le} 0.6 at an average Q{sup 2} of 2 GeV{sup 2} and found the integral I{sup n} = {integral}{sub 0}{sup 1}g{sub 1}{sup n}(x)dx={minus}0.022{plus_minus}0.011. E-143, which took data recently, has measured g{sub 1}{sup p} and g{sub 1}{sup 4}. Two more experiments (E-154 and E-155) will extend these measurements to lower x and higher Q{sup 2}.

Young, C.C.; E-142 Collaboration

1995-08-01

253

SLAC P2 Marx Control System and Regulation Scheme  

SciTech Connect

The SLAC P2 MARX Modulator consists of 32 cells charged in parallel by a -4 kV supply and discharged in series to provide a -120 kV 140 amp 1.7 millisecond pulse. Each cell has a 350 uF main storage capacitor. The voltage on the capacitor will droop approximately 640 volts during each pulse. Each cell will have a boost supply that can add up to 700 V to the cell output. This allows the output voltage of the cell to remain constant within 0.1% during the pulse. The modulator output voltage control is determined by the -4 kV charging voltage. A voltage divider will measure the modulator voltage on each pulse. The charging voltage will be adjusted by the data from previous pulses to provide the desired output. The boost supply in each cell consists of a 700 V buck regulator in series with the main capacitor. The supply uses a lookup table for PWM control. The lookup table is calculated from previous pulse data to provide a constant cell output. The paper will describe the modulator and cell regulation used by the MARX modulator. Measured data from a single cell and three cell string will be included.

MacNair, David; Kemp, Mark A.; Macken, Koen; Nguyen, Minh N.; Olsen, Jeff; /SLAC

2011-05-20

254

Conducting Summer School in Agriculture  

ERIC Educational Resources Information Center

|Course objectives, student competencies, and class session schedules are outlined for two high school vocational agriculture summer courses: Livestock and Livestock Products Evaluation and Agribusiness Leadership Seminar. (MS)|

Lloyd, Melvin

1976-01-01

255

164. HISTORIC AMERICAN ENGINEERING RECORD SUMMER RECORDING TEAM, 1992. LEFT ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

164. HISTORIC AMERICAN ENGINEERING RECORD SUMMER RECORDING TEAM, 1992. LEFT TO RIGHT: JOE ELLIOTT, PHOTOGRAPHER; VIRGINIA BRUMBACK, ARCHITECT; DAVE EVE, HISTORIAN (ICOMOS, IRONBRIDGE INSTITUTE, ENGLAND); BOB ARZYWACZ, PROJECT SUPERVISOR; LEE ANN JACKSON, ARCHITECT; AND ALBERT AFLENZER, ICOMOS ARCHITECT (TECHNICAL UNIVERSITY, VIENNA, AUSTRIA). - Bald Mountain Gold Mill, Nevada Gulch at head of False Bottom Creek, Lead, Lawrence County, SD

256

Looking for seismic scatterers: summer research experience for undergraduate students  

Microsoft Academic Search

This project was part of collaboration between Randolph College (VA) and Georgia Institute of Technology (GA). It was designed as summer research experience for undergraduate students. The duration of the project was eight weeks. The aim of this study was to search for fault zone scatterers in the Parkfield section of the San Andreas Fault, and examine the presence or

I. Gerasimenko; S. Bagchi; T. Toteva; Z. Peng

2008-01-01

257

An Astrobiology Summer Program for High School Teachers and Students  

Microsoft Academic Search

The Georgia Tech Center for Ribosomal Origins and Evolution, a center funded by the NASA Astrobiology Institute, developed an educational summer program titled, ``Life on the Edge: Astrobiology.'' The purpose of the program was to expose high school educators to the field of astrobiology and provide them with skills and classroom activities necessary to foster student interest in scientific discovery

J. Cola; L. D. Williams; E. Gaucher; T. Snell

2010-01-01

258

Davis-Monthan Air Force Base Summer Youth Program, 1972.  

ERIC Educational Resources Information Center

The 1972 Summer Youth Employment Program, sponsored by Davis-Monthan Air Force Base in Arizona, included 596 youngsters, of whom 377 belonged to the Neighborhood Youth Corps, 130 more were economically disadvantaged, and 48 were American Indian students employed by the base. A wide range of government, industrial, and educational institutions

Strategic Air Command (Air Force), Davis-Monthan AFB, AZ. Combat Support Group (803d).

259

"Sportacular Summer." 1995 Summer Library Program Manual. Bulletin No. 95218.  

ERIC Educational Resources Information Center

This manual was assembled to help Wisconsin librarians plan summer children's programming based on the theme "Sportacular Summer." Ideas in the manual were submitted by more than 45 Wisconsin librarians and gleaned from similar manuals in 5 other states. All materials have been designed to reflect a spirit of fun and to encourage delight in…

Roeber, Jane A., Ed.

260

Plant IT Summer Institute July 10, 2009 Resources  

NSDL National Science Digital Library

Adopting, adapting, and creating investigative cases for learners. Educational organizations and plant societies provide a wide variety of learning materials. Seeds and other plant parts are useful in many cultures not just as food, but as a source of medicines, dyes, art, tools, etc.

Ethel Stanley (Beloit College;Biology); Toni Lafferty (C.H. Yoe High School;Science)

2009-07-10

261

Plant IT Summer Institute July 8, 2009 Resources  

NSDL National Science Digital Library

Posters offer a way to present questions, data, methods, and conclusions and involve learners in peer review. Case writing should draw on learnerâÂÂs prior experience and generate a need to know. The use of online resources is encouraged.

Ethel Stanley (Beloit College;Biology)

2009-07-08

262

PlantIT Summer Institute July 14, 2010 Resources  

NSDL National Science Digital Library

Evidence for an investigative case is provided, including fiber analysis images. Participants submit group posters on fiber and sequence analysis. See links to resources for building a case on cotton.

Ethel D. Stanley (Beloit College;Biology); Toni Lafferty (C. H. Yoe High School;Biology)

2010-07-14

263

45 CFR 2400.50 - Allowances and Summer Institute costs.  

Code of Federal Regulations, 2012 CFR

...Welfare (Continued) JAMES MADISON MEMORIAL FELLOWSHIP FOUNDATION FELLOWSHIP PROGRAM REQUIREMENTS Graduate Study § 2400...Foundation directly but may be offset against fellowship award limits if the credits earned for the...

2012-10-01

264

17th International Summer School on Vacuum, Electron, and Ion Technologies (VEIT 2011)  

Microsoft Academic Search

The International Summer School on Vacuum, Electron and Ion Technologies (VEIT) has been organized biennially since 1977, when the VEIT Summer School series was launched by the Institute of Electronics, Bulgarian Academy of Sciences. The aim was to act as a forum for the exchange and dissemination of knowledge and ideas on the latest developments in electron-, ion- and plasma-assisted

M C M van de Sanden; Miglena Dimitrova; Chavdar Ghelev

2012-01-01

265

Summer Drying Under Enhanced Greenhouse Gas Warming  

NASA Astrophysics Data System (ADS)

Present day climate and future climate projections from the latest version of the Max Planck Institute GCM, ECHAM5, at T106 resolution are used to investigate changes in the near-surface climate, focusing on summer in Europe. For the control climate, ECHAM5 has been integrated over the period 1961 to 1990, using sea surface temperature (SST) and sea ice cover (SIC) provided by the EU project PRUDENCE. Projections of future climate are based on the SRES scenario A2 from 2071-2100. SST and SIC were inferred from a coupled transient experiment carried out at the Hadley Centre with HadCM3. In summer, precipitation in the future climate integration decreases over most of continental Europe excluding Northern Scandinavia. This leads to a distinct decrease in soil moisture, with maximum absolute changes in Central Europe and Northern Spain. The highest negative signal in evaporation is found over Southern Europe where water is already limited under present-day climate conditions. This feature is closely related to the strong decrease of the water stress factor south of approximately 46N. The Bowen ratio will decline by more than 3 during the pronounced summer drying in Southern Spain, South Italy and Greece, implying a reduced evaporative cooling and thus a strong warming. In contrast, water hardly becomes a limiting factor in Central and Northern Europe in summer. The variability of summer temperatures generally increases slightly over Central Europe. Additionally, the widening of the statistical distribution exceeds 20% in major parts in Southern Europe since these areas are more often affected by summer droughts. For precipitation, the coefficient of variance (the standard deviation divided by its mean) increases by more than 100% over major parts of the Iberian Peninsula, indicating that the normalized precipitation variability significantly increases over the strongly water-limited region. In winter, ECHAM5 simulates a water-limited climate only in a minor part of Southern Europe, while in the major part of Europe precipitation is sufficient to allow for unlimited water supply. In the scenario run, the water-limited climate slightly extends to the north, up to approximately 40N. In addition to Southern Europe, the water stress factor in the scenario run (in JJA) declines by more than 0.1 in the following regions: Southwest Africa (Namibia, Botswana) as well as extended parts in Brazil and Australia. These predominantly semi-arid regions will thus be more often affected by droughts in the future, pointing out the high vulnerability of semi-arid land to enhanced greenhouse gas warming.

Roesch, A.; Wild, M.; Tschuck, P.

2005-12-01

266

Quality of Summer Teachers Examined  

ERIC Educational Resources Information Center

|A hefty body of evidence documents the phenomenon of "summer learning loss," but consensus on the attributes of effective summer intervention, especially when it comes to access to high-quality teaching for students most at risk of falling behind, is only starting to emerge. Now, though, a handful of districts are beginning to wrestle with the…

Sawchuk, Stephen

2011-01-01

267

Final Design of the SLAC P2 Marx Klystron Modulator  

SciTech Connect

The SLAC P2 Marx has been under development for two years, and follows on the P1 Marx as an alternative to the baseline klystron modulator for the International Linear Collider. The P2 Marx utilizes a redundant architecture, air-insulation, a control system with abundant diagnostic access, and a novel nested droop correction scheme. This paper is an overview of the design of this modulator. There are several points of emphasis for the P2 Marx design. First, the modulator must be compatible with the ILC two-tunnel design. In this scheme, the modulator and klystron are located within a service tunnel with limited access and available footprint for a modulator. Access to the modulator is only practical from one side. Second, the modulator must have high availability. Robust components are not sufficient alone to achieve availability much higher than 99%. Therefore, redundant architectures are necessary. Third, the modulator must be relatively low cost. Because of the large number of stations in the ILC, the investment needed for the modulator components is significant. High-volume construction techniques which take advantage of an economy of scale must be utilized. Fourth, the modulator must be simple and efficient to maintain. If a modulator does become inoperable, the MTTR must be small. Fifth, even though the present application for the modulator is for the ILC, future accelerators can also take advantage of this development effort. The hardware, software, and concepts developed in this project should be designed such that further development time necessary for other applications is minimal.

Kemp, M.A.; Benwell, A.; Burkhart, C.; Larsen, R.; MacNair, D.; Nguyen, M.; Olsen, J.; /SLAC

2011-11-08

268

Summer Moonshine and Beyond  

NASA Astrophysics Data System (ADS)

Determining the composition of planetary surfaces remotely has been a major scientific and technological challenge throughout the history of planetary science and astronomy. In the 1960's Tom McCord, working with Bruce Murray at Caltech, began working with then state-of-the-art photometric instrumentation to make an order of magnitude leap in the precision of reflection spectroscopy measurements for the Moon. Not only did he have to overcome major technological and engineering challenges, he had to apply the developing science of solid-state crystal field theory to understand the compositional implication of his measurements. At the time many astronomers and chemists were skeptical that unique identifications could be made, feeling that 'you can make anything any color you want with a few impurities'. Tom's work laid the observational and analytic groundwork for much of the current discipline of remote sensing in the visible and near infrared wavelengths. His equipment and expertise were initially applied to a survey of potential Apollo landing sites (Summer Moonshine), where I first was introduced to the techniques of reflection spectroscopy (and a piece of the moon in Serenitatis soon to be infamous for all Tom's associates). Since then his techniques and observations have been applied to essentially every part of the solar system, and he, his associates and students have played major roles on most of the major planetary exploration missions of the last three decades.

Johnson, T. V.

2002-12-01

269

Institution Closures.  

ERIC Educational Resources Information Center

|This newsletter theme issue focuses on the need to accelerate the closing of institutions for people with mental retardation. Articles are by both current and former residents of institutions and by professionals, and include: "The Realities of Institutions" (Tia Nelis); "I Cry Out So That I Won't Go Insane" (Mary F. Hayden); "Trends in…

Hayden, Mary F., Ed.; And Others

1995-01-01

270

Institutional Trap  

Microsoft Academic Search

One of the main obstacles for successful economic development is the formation of institutional traps, inefficient yet stable norms of behaviour. Domination of barter exchange, arrears, corruption and black market activities are examples of institutional traps that have hampered reforms in transition economies. Institutional traps are supported by mechanisms of coordination, learning, linkage and cultural inertia. The acceleration of economic

Victor Polterovich

2007-01-01

271

Institution Closures.  

ERIC Educational Resources Information Center

This newsletter theme issue focuses on the need to accelerate the closing of institutions for people with mental retardation. Articles are by both current and former residents of institutions and by professionals, and include: "The Realities of Institutions" (Tia Nelis); "I Cry Out So That I Won't Go Insane" (Mary F. Hayden); "Trends in…

Hayden, Mary F., Ed.; And Others

1995-01-01

272

Solstice, Science, and Summer Reading  

NSDL National Science Digital Library

Like generations before them, teachers often use the energy of the summer Sun to nurture seeds of growth (both real and virtual) for another year. Whether you believe the ancient legends or not, summer provides catch-up time. You can turn off your alarm and let the magic of your biorhythms take over. As they have in past years, the reviewers of NSTA Recommends have prepared some suggestions for summer reading. Some of their suggestions are scientific, some motivational, some practical�and some just plain fun. So where ever your comfort zone is, pull up a chair because it's time to read.

Texley, Juliana

2007-07-01

273

Initial Testing of the Mark-0 X-Band RF Gun at SLAC  

SciTech Connect

A new X-band RF gun (Mark-0) has been assembled, tuned and was tested in the ASTA facility at SLAC. This gun has been improved from an earlier gun used in Compton-scattering experiments at SLAC by the introduction of a racetrack dual-input coupler to reduce quadrupole fields. Waveguide-to-coupler irises were also redesigned to reduce surface magnetic fields and therefore peak pulse surface heating. Tests of this photocathode gun will allow us to gain early operational experience for beam tests of a new gun with further improvements (Mark-1) being prepared for SLAC's X-Band Test Area (XTA) program and the LLNL MEGa-ray program. Results of current testing up to {approx} 200 MV/m peak surface Electric fields are presented.

Vlieks, Arnold; Adolphsen, C.; Dolgashev, V.; Lewandowski, J.; Limborg, Cecile; Weathersby, S.; /SLAC

2012-06-06

274

Current Research: Summer Reading Suggestions  

NSDL National Science Digital Library

To supplement your summer reading, NSTA's affiliates would like to suggest some recent articles on education research. These articles cover a variety of topics that include diversity, technology, and science teacher retention. The abstracts of these impor

2009-07-01

275

Electroweak Radiative Corrections to the Parity-violating Asymmetry for SLAC Experiment E158  

SciTech Connect

Electroweak radiative corrections to observable quantities of Moeller scattering of polarized particles are calculated. We emphasize the contribution induced by infrared divergent parts of cross section. The covariant method is used to remove infrared divergences, so that our results do not involve any unphysical parameters. When applied to the kinematics of SLAC E158 experiment, these corrections reduce the parity violating asymmetry by about -6.5% at E = 48 GeV and y = 0.5, and kinematically weighted 'hard' bremsstrahlung effect for SLAC E158 is {approx} 1%.

Zykunov, Vladimir A.; /Gomel State Tech. U.

2012-04-04

276

Burn Institute  

MedlinePLUS

... of 8 experienced a horrific accident. He awoke one night to a house engulfed in flames... Read More Jerry Davee In 1978, Jerry Davee suffered severe burns while trying to ... severe burns. One year later, Jerry received the Burn Institute’s Spirit ...

277

Smithsonian Institution  

NSDL National Science Digital Library

This is the home page of the Smithsonian Institution. The main web site provides access to online exhibits, education resources, library catalogs and archives, and publications. There are also links to each of the Institution's many museums, research centers, and outreach programs. Other materials include links to Smithsonian television programs, podcasts, and blogs.

278

Institutional Reports  

ERIC Educational Resources Information Center

The reports cover the adult literary programs in Himachal Pradesh, the Madras Regional Council for Adult Education (AE), the AE institution Lik Shikshan Vibhag, the Bikaner AE Association, the Varanasi Council of literacy and AE, the AE department (extension) of Rajasthan, the Indore Workers Institute, and the Ministry of Education's Directorate…

Indian Journal of Adult Education, 1973

1973-01-01

279

Sustainability Institute  

NSDL National Science Digital Library

The Sustainability Institute is a nonprofit organization that provides information, analysis, and practical demonstrations that help promote the development of sustainable systems locally, regionally, and globally. Users can read about recent projects and services that the Sustainability Institute has been involved in .

2007-01-20

280

600 kV modulator design for the SLAC Next Linear Collider Test Accelerator.  

National Technical Information Service (NTIS)

Preliminary design for the SLAC Next Linear Collider Test Accelerator (NLCTA) requires a pulse power source to produce a 600 kV, 600 A, 1.4 (mu)s, 0.1% flat top pulse with rise and fall times of approximately 100 ns to power an X-Band klystron with a micr...

K. Harris J. de Lamare V. Nesterov R. Cassel

1992-01-01

281

Design of an Optical Diffraction Radiation Beam Size Monitor at SLAC FFTB.  

National Technical Information Service (NTIS)

We design a single bunch transverse beam size monitor which will be tested to measure the 28.5 GeV electron/positron beam at the SLAC FFTB beam line. The beam size monitor uses the CCD images of the interference pattern of the optical diffraction radiatio...

D. B. Cline F. Zhou M. Ross P. Bolton Y. Fukui

2008-01-01

282

The MeV Gamma Compton Polarimeter for the SLAC FFTB Undulator Test  

Microsoft Academic Search

This note describes a Compton polarimeter for the FFTB undulator photon beam experiment at SLAC. Photons of a few MeV are scattered o polarized electrons in a thin ferromagnetic foil target. Photons are detected with a simple calorimetric detector which is mounted under a xed scattering angle behind a small collimator aperture. We have evaluated the expected performance of the

Vahagn Gharibyan; K. Peter Sch

283

Structure Loaded Vacuum Laser-Driven Particle Acceleration Experiments at SLAC  

SciTech Connect

We present an overview of the future laser-driven particle acceleration experiments. These will be carried out at the E163 facility at SLAC. Our objectives include a reconfirmation of the proof-of-principle experiment, a staged buncher laser-accelerator experiment, and longer-term future experiments that employ dielectric laser-accelerator microstructures.

Plettner, T.; Byer, R.L.; Colby, E.R.; Cowan, B.M.; Ischebeck, R.; McGuinness, C.; Lincoln, M.R.; Sears, C.M.; Siemann, R.H.; Spencer, J.E.; /SLAC /Stanford U., Phys. Dept.

2007-04-09

284

High Frequency, High Gradient Dielectric Wakefield Acceleration Experiments at SLAC and BNL  

SciTech Connect

Given the recent success of >GV/m dielectric wakefield accelerator (DWA) breakdown experiments at SLAC, and follow-on coherent Cerenkov radiation production at the UCLA Neptune, a UCLA-USC-SLAC collaboration is now implementing a new set of experiments that explore various DWA scenarios. These experiments are motivated by the opportunities presented by the approval of FACET facility at SLAC, as well as unique pulse-train wakefield drivers at BNL. The SLAC experiments permit further exploration of the multi-GeV/m envelope in DWAs, and will entail investigations of novel materials (e.g. CVD diamond) and geometries (Bragg cylindrical structures, slab-symmetric DWAs), and have an over-riding goal of demonstrating >GeV acceleration in {approx}33 cm DWA tubes. In the nearer term before FACET's commissioning, we are planning measurements at the BNL ATF, in which we drive {approx}50-200 MV/m fields with single pulses or pulse trains. These experiments are of high relevance to enhancing linear collider DWA designs, as they will demonstrate potential for efficient operation with pulse trains.

Rosenzweig, James; /UCLA; Travish, Gil; /UCLA; Hogan, Mark; /SLAC; Muggli, Patric; /Southern California U.

2012-07-05

285

A user's guide to particle physics computer-searchable databases on the SLAC-SPIRES system  

SciTech Connect

This report discusses five computer-searchable databases located at SLAC which are of interest to particle physicists. These databases assist the user in literature-searching, provide numerical data extracted from papers, and contain information about experiments. We describe the databases briefly, tell how to use the SPIRES database management system to access them interactively, and give several examples of their use.

Rittenberg, A.; Armstrong, F.E.; Levine, B.S.; Trippe, T.G.; Wohl, C.G.; Yost, G.P.; Whalley, M.R.; Addis, L.

1986-09-01

286

Computer modelling of bunch-by-bunch feedback for the SLAC B-factory design.  

National Technical Information Service (NTIS)

The SLAC B-factory design, with over 1600 high current bunches circulating in each ring, will require a feedback system to avoid coupled-bunch instabilities. A computer model of the storage ring, including the RF system, wave fields, synchrotron radiation...

D. Briggs J. D. Fox W. Hosseini L. Klaisner P. Morton

1991-01-01

287

Test of QED using a laser at the SLAC final focus test beam.  

National Technical Information Service (NTIS)

Experiment (number sign)144 at SLAC has three parts: the search for low-mass states excited in (gamma)(gamma) collisions and observed in pair decay, the study of nonlinear, nonperturbative QED in (gamma)e and (gamma)(gamma) collisions, and its possible ap...

J. E. Spencer

1992-01-01

288

A user's guide to particle physics computer-searchable databases on the SLAC-SPIRES system  

Microsoft Academic Search

This report discusses five computer-searchable databases located at SLAC which are of interest to particle physicists. These databases assist the user in literature-searching, provide numerical data extracted from papers, and contain information about experiments. We describe the databases briefly, tell how to use the SPIRES database management system to access them interactively, and give several examples of their use.

A. Rittenberg; F. E. Armstrong; B. S. Levine; T. G. Trippe; C. G. Wohl; G. P. Yost; M. R. Whalley; L. Addis

1986-01-01

289

Inquiry Science Professional Development Combined with a Science Summer Camp for Immediate Application  

ERIC Educational Resources Information Center

This study evaluated the effectiveness of an intensive three-week science institute for preservice and inservice elementary teachers that was funded by an Eisenhower Professional Development grant and a Regents' Initiative Research grant. The institute was held in combination with a summer science camp for elementary children. Pre- and…

Naizer, Gilbert; Bell, Glenda Love; West, Keith; Chambers, Sharon

2003-01-01

290

Mathematics Intensive Summer Session (MISS). Final technical report  

SciTech Connect

This final technical report appears in two parts: the report for the 1995 summer MISS program and the report for the 1996 summer MISS program. Copies of the US Department of Energy Pre-Freshman Enrichment Program 1995 Entry Form and 1996 Entry Form completed by all participants were sent to the Oak Ridge Institute for Science and Education in the fall of 1995 and 1996 respectively. Those forms are on file should they be needed. Attached also is a copy of the Summary of ideas for panel discussions, problem-solving sessions, or small group discussions presented at the Department of Energy Oak Ridge Institute for Science and Education Pre-Freshman Enrichment Program Project Directors Meeting held in San Antonio, TX, November 12--14, 1995.

NONE

1998-11-01

291

Interannual and Interdecadal Variability of Thailand Summer Monsoon Season.  

NASA Astrophysics Data System (ADS)

Summer monsoon rains are a critical factor in Thailand's water resources and agricultural planning and management. In fact, they have a significant impact on the country's economic health. Consequently, understanding the variability of the summer monsoon rains over Thailand is important for instituting effective mitigating strategies against extreme rainfall fluctuations. To this end, the authors systematically investigated the relationships between summer monsoon precipitation from the central and northern regions of Thailand and large-scale climate features. It was found that Pacific sea surface temperatures (SSTs), in particular, El Niño-Southern Oscillation (ENSO), have a negative relationship with the summer monsoon rainfall over Thailand in recent decades. However, the relationship between summer rainfall and ENSO was weak prior to 1980. It is hypothesized that the ENSO teleconnection depends on the SST configuration in the tropical Pacific Ocean, that is, an eastern Pacific-based El Niño pattern, such as is the case in most of the post-1980 El Niño events, tends to place the descending limb of the Walker circulation over the Thailand-Indonesian region, thereby significantly reducing convection and consequently, rainfall over Thailand. It is believed that this recent shift in the Walker circulation is instrumental for the nonstationarity in ENSO-monsoon relationships in Thailand. El Niños of 1997 and 2002 corroborate this hypothesis. This has implications for monsoon rainfall forecasting and, consequently, for resources planning and management.

Singhrattna, Nkrintra; Rajagopalan, Balaji; Krishna Kumar, K.; Clark, Martyn

2005-06-01

292

Molecular Evolution of Slow and Quick Anion Channels (SLACs and QUACs/ALMTs)  

PubMed Central

Electrophysiological analyses conducted about 25?years ago detected two types of anion channels in the plasma membrane of guard cells. One type of channel responds slowly to changes in membrane voltage while the other responds quickly. Consequently, they were named SLAC, for SLow Anion Channel, and QUAC, for QUick Anion Channel. Recently, genes SLAC1 and QUAC1/ALMT12, underlying the two different anion current components, could be identified in the model plant Arabidopsis thaliana. Expression of the gene products in Xenopus oocytes confirmed the quick and slow current kinetics. In this study we provide an overview on our current knowledge on slow and quick anion channels in plants and analyze the molecular evolution of ALMT/QUAC-like and SLAC-like channels. We discovered fingerprints that allow screening databases for these channel types and were able to identify 192 (177 non-redundant) SLAC-like and 422 (402 non-redundant) ALMT/QUAC-like proteins in the fully sequenced genomes of 32 plant species. Phylogenetic analyses provided new insights into the molecular evolution of these channel types. We also combined sequence alignment and clustering with predictions of protein features, leading to the identification of known conserved phosphorylation sites in SLAC1-like channels along with potential sites that have not been yet experimentally confirmed. Using a similar strategy to analyze the hydropathicity of ALMT/QUAC-like channels, we propose a modified topology with additional transmembrane regions that integrates structure and function of these membrane proteins. Our results suggest that cross-referencing phylogenetic analyses with position-specific protein properties and functional data could be a very powerful tool for genome research approaches in general.

Dreyer, Ingo; Gomez-Porras, Judith Lucia; Riano-Pachon, Diego Mauricio; Hedrich, Rainer; Geiger, Dietmar

2012-01-01

293

Summer Ice and Carbon Dioxide  

NASA Astrophysics Data System (ADS)

The extent of Antarctic pack ice in the summer, as charted from satellite imagery, decreased by 2.5 million square kilometers between 1973 and 1980. The U.S. Navy and Russian atlases and whaling and research ship reports from the 1930's indicate that summer ice conditions earlier in this century were heavier than the current average. Surface air temperatures along the seasonally shifting belt of melting snow between 55 degrees and 80 degrees N during spring and summer were higher in 1974 to 1978 than in 1934 to 1938. The observed departures in the two hemispheres qualitatively agree with the predicted impact of an increase in atmospheric carbon dioxide. However, since it is not known to what extent the changes in snow and ice cover and in temperature can be explained by the natural variability of the climate system or by other processes unrelated to carbon dioxide, a cause-and-effect relation cannot yet be established.

Kukla, G.; Gavin, J.

1981-10-01

294

Summer ice and carbon dioxide  

SciTech Connect

The extent of Antarctic pack ice in the summer, as charted from satellite imagery, decreased by 2.5 million square kilometers between 1973 and 1980. The U.S. Navy and Russian atlases and whaling and reseach ship reports from the 1930's indicate that summer ice conditions earlier in this century were heavier than the current average. Surface air temperatures along the seasonally shifting belt of melting snow between 55/sup o/ and 80/sup o/N during spring and summer were higher in 1974 to 1978 than in 1934 to 1938. The observed departures in the two hemispheres qualitatively agree with the predicted impact of an increase in atmospheric carbon dioxide. However, since it is not known to what extent the changes in snow and ice cover and in temperature can be explained by the natural variability of the climate system or by other processes unrelated to carbon dioxide, a cause-and-effect relation cannot yet be established.

Kukla, G.; Gavin, J.

1981-10-30

295

Activity of guard cell anion channel SLAC1 is controlled by drought-stress signaling kinase-phosphatase pair  

PubMed Central

In response to drought stress the phytohormone ABA (abscisic acid) induces stomatal closure and, therein, activates guard cell anion channels in a calcium-dependent as well as-independent manner. Two key components of the ABA signaling pathway are the protein kinase OST1 (open stomata 1) and the protein phosphatase ABI1 (ABA insensitive 1). The recently identified guard cell anion channel SLAC1 appeared to be the key ion channel in this signaling pathway but remained electrically silent when expressed heterologously. Using split YFP assays, we identified OST1 as an interaction partner of SLAC1 and ABI1. Upon coexpression of SLAC1 with OST1 in Xenopus oocytes, SLAC1-related anion currents appeared similar to those observed in guard cells. Integration of ABI1 into the SLAC1/OST1 complex, however, prevented SLAC1 activation. Our studies demonstrate that SLAC1 represents the slow, deactivating, weak voltage-dependent anion channel of guard cells controlled by phosphorylation/dephosphorylation.

Geiger, Dietmar; Scherzer, Sonke; Mumm, Patrick; Stange, Annette; Marten, Irene; Bauer, Hubert; Ache, Peter; Matschi, Susanne; Liese, Anja; Al-Rasheid, Khaled A. S.; Romeis, Tina; Hedrich, Rainer

2009-01-01

296

Development of Cellulosic Biofuels (LBNL Summer Lecture Series)  

SciTech Connect

Summer Lecture Series 2007: Chris Somerville, Director of the Energy Biosciences Institute and an award-winning plant biochemist with Berkeley Lab's Physical Biosciences Division, is a leading authority on the structure and function of plant cell walls. He discusses an overview of some of the technical challenges associated with the production of cellulosic biofuels, which will require an improved understanding of a diverse range of topics in fields such as agronomy, chemical engineering, microbiology, structural biology, genomics, environmental sciences, and socioeconomics.

Somerville, Chris (Director, Energy Biosciences Institute)

2007-06-20

297

Phenomenology Institute  

NSDL National Science Digital Library

The Phenomenology Institute at the University of Wisconsin-Madison pursues "a broad range of research in particle physics theory and phenomenology." At this website, users can view concise summaries of its many focuses including in neutrino physics, string theory and extra dimensions, and electroweak physics. Visitors can find links to the homepages of many of the researchers involved with the Institute. The website features the upcoming and past events held by the Institute such as the Pheno Symposiums. Individuals can examine abstracts and compressed postscripts of the phenomenology preprints since 1994 as well as articles about the newest issues in phenomenology written for the popular press.

298

Urban Institute  

NSDL National Science Digital Library

The Urban Institute is a Washington DC-based, nonprofit organization devoted to economic and social policy research. Its Website holds a wealth of information featuring in-depth reports on social and economic issues facing the US and abroad. These reports are updated frequently and focus on such issues as American health care reform, child support, and social security. The Research section contains a huge database of Urban Institute reports and can be searched by topic, author, and date. The site also links to Urban Institute special programs including the National Center for Charitable Statistics and The Retirement Project.

299

Summer activities: incidents and accidents.  

PubMed

Summer invites activities and sports that are unique to this time of year. Although safety is a priority, there are commonly accidents and incidents that occur while individuals are participating in these activities. The prevalence and incidence of several types of injuries and trauma related to water activities, camping, caving, backpacking, and hiking are discussed. Treatment of nonfatal drowning is discussed, along with the pathophysiologic process that must be corrected for optimal outcomes. Summer is a time for outdoor cooking, campfires, and the traditional Fourth of July firework pastimes, which can result in admissions to critical care areas. PMID:23692945

Krau, Stephen D

2013-03-27

300

Land Institute  

NSDL National Science Digital Library

The Land Institute is devoted to researching sustainable agriculture. This site contains archives of present and past research activities along with down-loadable publications for use by scientists or the general public.

2008-12-02

301

SETI Institute  

NSDL National Science Digital Library

The Search for ExtraTerrestrial Intelligence (SETI) Institute has as its mission to explore, understand and explain the origin, nature, prevalence and distribution of life in the universe. The Web site contains the history and makeup of the institute, a science section that details ongoing projects and explains its telescope arrays, an education and outreach area, and other interesting news and facts. The page also links users to external resources on the web pertaining to this type of research.

2009-03-20

302

Welcome to LANL Summer 2012  

SciTech Connect

Alan Bishop, Principal Associate Director for Science, Technology & Engineering, delivers a Laboratory overview and welcome to the summer student population. Topics include LANL mission, opportunities, organization, and workforce, and the briefing concludes with a more in-depth look of the student programs.

Bishop, Alan [Los Alamos National Laboratory

2012-06-19

303

Designing a Sizzling Summer School.  

ERIC Educational Resources Information Center

|A summer school for elementary students used activities in design technology ("children's engineering"), a problem-based approach that encourages students to use a variety of equipment in creating, testing, and solving real-life problems. Design briefs used an array of skills from other content areas of the curriculum. (SK)|

Ackerman, Sharon; And Others

1997-01-01

304

Goddard Summer Interns: Andy Ryan  

NASA Video Gallery

Andy Ryan is an intern staff assistant with the Lunar and Planetary Science Academy. This summer the LPSA traveled to the Channeled Scablands of eastern Washington to study and map the geology of the area, which serves as a planetary analogy for certain areas mapped on Mars by the HiRISE camera on board the Mars Reconnaissance Orbiter.

gsfcvideo

2011-08-03

305

Students Participate in Summer Program.  

ERIC Educational Resources Information Center

|The Agricultural Research Service provides "hands-on" work experience in a research laboratory to college students interested in agriculture, science, math, and other related fields. Three Native American college students describe how participating in this summer intern program has helped them pursue their educational goals. (TD)|

Oliver, Jimmie Nell

1997-01-01

306

Summer Science Camps Program (SSC).  

ERIC Educational Resources Information Center

The Summer Science Camps (SSC) Program supports residential and commuter enrichment projects for seventh through ninth grade minority students who are underrepresented in science, engineering, and mathematics. Eligible organizations include school districts, museums, colleges, universities, and nonprofit youth-centered and/or community-based…

National Science Foundation, Washington, DC. Directorate for Education and Human Resources.

307

Goddard Summer Interns: Danielle Wood  

NASA Video Gallery

Profile of Goddard intern Danielle Wood. Danielle is interning at Goddard in the Innovative Partnerships Program and at NASA Headquarters in the Office of the Chief Technologist in the summer of 2011. The mission of her current internship is to consider new ways that NASA technology spin-offs can benefit developing countries.

gsfcvideo

2011-07-13

308

Earth Institute  

NSDL National Science Digital Library

The mission of the Earth Institute at Columbia University is to help the world achieve sustainability by expanding understanding of the Earth as one integrated system. Through research, education, and the practical application of research to real-world challenges, the Institute addresses nine interconnected global issues: climate and society, water, energy, poverty, ecosystems, public health, food and nutrition, and hazards and urbanization. The Institute's site offers a collection of videotaped events, including the biannual "State of the Planet" conferences, 2002-08, a Distinguished Lecture series, and the Sustainable Development seminar series, as well as e-seminars and e-briefings, information about funding opportunities, and information about educational opportunities at Columbia.

309

The Utah High School Computing Institute  

Microsoft Academic Search

Professor Cohen created the High School Institute over seven years ago with the goal of bringing students from outlying and mostly rural areas of Utah in contact with computer technologies integral to the future of design and manufacturing. 40-50 students a year spend five intensive weeks during the summer on campus at the University of Utah completing projects in computer

E. Cohen

1996-01-01

310

PD Pathways: Attending a Science Institute  

NSDL National Science Digital Library

For two weeks during Summer 2009, three elementary school teachers--Darcy Marcou, Melissa Lange, and Andrea Konitzer--participated in a science institute directed by Scott Ashmann, a science education professor at the University of Wisconsin-Green Bay. The

Konitzer, Andrea; Marcou, Darcy; Lange, Melissa; Ashmann, Scott

2010-12-01

311

SLAC RHONDA-TAC test router module: LD 135-396-00-R0 Logic Diagram (Engineering Materials)  

SciTech Connect

The logic diagram listed provides the basic ideas for designing a TAC (Time to Analog Converter) tester as used at SLAC. The device is built in a double width CAMAC module and is used to simulate the Detector chamber beam pulses, clear, and stop signals in their proper relationship, thus providing the TAC module with simulated pulses for calibration, checkout and condition. The device was used with the SLAC SPEAR storage ring and the MARK II Detector.

Not Available

1983-01-01

312

Investigation of High School Credit and Placement for Summer Coursework Taken Outside of Local Schools  

Microsoft Academic Search

This study examined how local schools responded to students’ outside-of-school summer courses, particularly regarding the awarding of credit and appropriate placement. It involved 262 middle and high school administrators of students who had attended a gifted summer program at a local university. Survey data showed the critical influence of the school’s policies on granting credit for outside-of-school coursework and institutional

Seon-Young Lee; Paula Olszewski-Kubilius

2005-01-01

313

Lattice design and optimization for the PEP-X ultra low emittance storage ring at SLAC  

SciTech Connect

SLAC is developing a long-range plan to transfer the evolving scientific programs at SSRL from the SPEAR3 light source to a much higher performing photon source. One of the possibilities is a new PEP-X 4.5 GeV storage ring that would be housed in the 2.2 km PEP-II tunnel. The PEP-X is designed to produce photon beams having brightness near 10{sup 22} (ph/s/mm{sup 2}/mrad{sup 2}/0.1% BW) at 10 keV with 3.5 m undulator at beam current of 1.5 A. This report presents an overview of the PEP-X baseline lattice design and describes the lattice optimization procedures in order to maximize the beam dynamic aperture. The complete report of PEP-X baseline design is published in SLAC report.

Wang, Min-Huey; Nosochkov, Yuri; Bane, Karl; Cai, Yunhai; Hettel, Robert; Huang, Xiaobiao; /SLAC

2011-08-12

314

SLAC linear collider and a few ideas on future linear colliders  

SciTech Connect

This paper comes in two parts. The first part is a progress report on the SLAC Linear Collider (SLC) with emphasis on those systems which are of special interest to linear accelerator designers; it sets the stage for a number of contributed papers on specific topics which are also presented at this conference. The second part presents some ideas which are of interest to the design of future linear colliders of higher energies.

Loew, G.A.

1984-04-01

315

Performance characteristics, optimization, and error tolerances of a 4 nm FEL based on the SLAC linac  

Microsoft Academic Search

A 4 nm free electron laser (FEL) operating in Self Amplified Spontaneous Emission (SASE), and using the SLAC linac as a driver has been extensively studied using the FRED3D and TDA3D codes. Using a 7 GeV beam with a normalized RMS emittance of 3 mm-mrad and a peak current of 2500 A, obtained by longitudinal bunch compression, the FEL can

K.-J. Kim; M. Xie; E. T. Scharlemann; C. Pellegrini; G. Travish

1993-01-01

316

Operation of a Ti:sapphire laser for the SLAC polarized electron source  

Microsoft Academic Search

A new laser system has been developed as the light source for the SLAC polarized electron source for the 1993 SLD physics run. A Q-switched and cavity-dumped Ti:Sapphire laser, pumped by a doubled YAG laser is used. This laser delivers typically 50 ?J to the photocathode with the required 2 nanosecond, double pulse, 120 Hz time structure. The laser operates

Josef Frisch; Ray Alley; Mike Browne; Mike Woods

1993-01-01

317

Ticket to a First Class Summer.  

ERIC Educational Resources Information Center

|Eight reproducible pages are offered for teachers to use as a summer send-off package which contains activities extending from a child's backyard to outer space. A list of books for summer reading is included. (MT)|

Instructor, 1987

1987-01-01

318

Stay Healthy at Animal Exhibits This Summer  

MedlinePLUS

... Favorites Delicious Digg Google Bookmarks Stay Healthy at Animal Exhibits This Summer There are many ways to ... animal exhibits this summer. Gastrointestinal (Enteric) Diseases from Animals Check out CDC’s Gastrointestinal (Enteric) Diseases from Animals ...

319

Undignifying institutions.  

PubMed

Declarations of the importance of dignity in health care are commonplace in codes of practice and other mission statements, yet these documents never clarify dignity's meaning. Their vague aspirations are compared to comments from staff and patients about opportunities for and barriers against the promotion of dignity in elderly care institutions. These suggest that while nurses and health care assistants have an intuitive understanding of dignity, they either do not or cannot always bring it about in practice. Thus, despite stated intentions to promote dignity, it appears that the circumstances of at least some elderly care institutions cause patients to experience avoidable indignities. Such institutions are "undignifying institutions" because they fail to acknowledge dignity's basic components, focus excessively on quantifiable priorities, and have insufficient resources available to assure consistently dignifying care. As a partial solution, we argue that health workers should be taught to understand and specify the components of dignity, which will better prepare them to challenge undignifying practices and to recognise opportunities for dignity promotion. PMID:12468656

Seedhouse, D; Gallagher, A

2002-12-01

320

Artists Paint ... Summer: Grade 2  

ERIC Educational Resources Information Center

|A humid summer haze covers the River Seine and the grassy bank where young men and boys go swimming on Sunday. Everything seems so quiet, still, and very hot. They wear hats to protect them from the hot sun. The artist Georges Seurat used warm tones to give viewers the feeling of the hot sun. Seurat was trying to catch the dazzle of hot sunlight…

Herberholz, Barbara

2012-01-01

321

Impact of CF Summer Camp  

Microsoft Academic Search

In two consecutive years, patients with cystic fibrosis were studied at the beginning and end of a nine-day summer camp program to assess the program's effects on weight gain and pulmonary function. The camp experience includes daily exercise and a high-protein and high-fat diet. There were a total of 58 children between 6 and 12 years of age (42 different

Ted A. Kaplan; Robert M. McKey; Norma Toraya; Gina Moccia

1992-01-01

322

Santa Cruz summer study papers  

SciTech Connect

Utilization of conservation measures and application of passive solar design in buildings are examined. The notion that solar energy is materials-intensive and requires so much energy in construction as to be impractical is dispelled. Also, the notion that conservation is doing without is dispelled. This report is a collection of papers by the author related to the Summer Study and entitled: On the Quality of Buildings; Balanced Design; Technical Potential of Combined Passive Solar and Conservation Strategies; and Alternative BEPS Implementation.

Balcomb, J.D.

1980-01-01

323

Hydromania: Summer Science Camp Curriculum.  

SciTech Connect

In 1992, Bonneville Power Administration (BPA) and the US Department of Energy (DOE) began a collaborative pilot project with the Portland Parks and Recreation Community Schools Program and others to provide summer science camps to children in Grades 4--6. Camps run two weeks in duration between late June and mid-August. Sessions are five days per week, from 9 a.m. to 3 p.m. In addition to hands-on science and math curriculum, at least three field trips are incorporated into the educational learning experience. The purpose of the BPA/DOE summer camps is to make available opportunities for fun, motivating experiences in science to students who otherwise would have difficulty accessing them. This includes inner city, minority, rural and low income students. Public law 101-510, which Congress passed in 1990, authorizes DOE facilities to establish collaborative inner-city and rural partnership programs in science and math. A primary goal of the BPA summer hands on science camps is to bring affordable science camp experiences to students where they live. It uses everyday materials to engage students` minds and to give them a sense that they have succeeded through a fun hands-on learning environment.

Moura, Joan

1995-07-01

324

Institutional obligation  

SciTech Connect

The institutional obligation is to act to meet primary responsibilities in the face of risks. There are risks involved in taking action, both of a quantifiable and unquantifiable nature. This paper explores weighing the risks, choosing approaches that balance primary obligations with broader ones, and presenting ethical philosophies upon which policies and strategies are based. Federal government organizations and utilities--and Bonneville Power Administration qualifies as both--have a variety of responsibilities to the public they serve. The common responsibility is that of service; for Bonneville the primary responsibility is to serve the energy related needs. It is this primary institutional obligation, as it relates to other responsibilities--and the resulting strategy for handling indoor air quality in Bonneville's new homes program--that this paper examines.

Rowan, S.S.; Berwager, S.D. (Bonneville Power Administration, Portland, OR (US))

1988-01-01

325

NSTA Institute  

NSDL National Science Digital Library

A professional development gateway for science educators. Provides face-to-face learning opportunities, as well as on-line courses and web seminars year round. Offerings from several respected institutions cover diverse topics in biology, chemistry, earth and space science, math, science education methods and more. Programs range from 90-minute sessions to 50-hour courses. Continuing education units and graduate credits available for some. Tuition fees apply.

326

Nuclear Concepts & Technological Issues Institute: Teacher Activity Booklet.  

ERIC Educational Resources Information Center

|For many summers the Radiation Science and Engineering Center at Pennsylvania State University has been the site of a Nuclear Concepts and Technological Issues Institute for secondary school science teachers. As a culminating activity of the institute teachers develop lesson plans, laboratory experiments, demonstrations, or other activities and…

Davison, Candace C., Ed.; Lunetta, Lois W., Ed.

327

Institute for Training Local District Research Workers. Final Report.  

ERIC Educational Resources Information Center

An 8-week summer institute designed to train 26 public school persons as research workers for their local school districts was conducted at the University of Florida in 1966. A year-long followup consisted of 1 two-day and 4 one-day seminars to discuss and evaluate progress on research under way. Institute courses included: (1) research techniques…

Kimbrough, Ralph B.

328

Nuclear Concepts & Technological Issues Institute: Teacher Activity Booklet.  

ERIC Educational Resources Information Center

For many summers the Radiation Science and Engineering Center at Pennsylvania State University has been the site of a Nuclear Concepts and Technological Issues Institute for secondary school science teachers. As a culminating activity of the institute teachers develop lesson plans, laboratory experiments, demonstrations, or other activities and…

Davison, Candace C., Ed.; Lunetta, Lois W., Ed.

329

LUCIFER status report, summer 2004  

NASA Astrophysics Data System (ADS)

LUCIFER (LBT NIR Spectrograph Utility with Camera and Integral-Field Unit for Extragalactic Research) is a NIR spectrograph and imager for the LBT (Large Binocular Telescope) working in the wavelength range from 0.9 to 2.5 microns. The instrument is to be built by a consortium of five german institutes (Landessternwarte Heidelberg (LSW), Max Planck Institut for Astronomy (MPIA), Max Planck Institut for Extraterrestric Physics (MPE), Astronomical Institut of the Ruhr-University Bochum (AIRUB) and Fachhochschule for Technics and Design Mannheim (FHTG)). LUCIFER will be one of the first light instruments of the LBT and will be available to the community at the end of 2005. A copy of the instrument for the second LBT mirror follows about one year later. The paper presents a brief status report of the procured and built hardware, of the workpackages already carried out and summarizes the ongoing work in progress.

Mandel, Holger; Appenzeller, Immo; Seifert, Walter; Baumeister, Harald; Bizenberger, Peter; Dettmar, Ralf-Juergen; Gemperlein, Hans; Grimm, Bernhard; Herbst, Tom M.; Hofmann, Reiner; Jutte, Marcus; Laun, Werner; Lehmitz, Michael; Ligori, Sebastiano; Lenzen, Rainer; Polsterer, Kai; Rohloff, Ralf-Rainer; Schuetze, Andreas; Seltmann, Andreas; Weiser, Peter; Weisz, Harald; Xu, Wenli

2004-09-01

330

The 'Year without summer 1816  

NASA Astrophysics Data System (ADS)

One famous example of an extreme climatic event is the cold summer of 1816 in Europe and North America. This specific year, which was later called the "Year without summer 1816", had profound social and environmental effects. The cataclysmic eruption of Mt Tambora is now commonly known to have largely contributed to the negative temperature anomalies of the summer 1816, but some uncertainties remain. The eruption which occurred in April 1815 is the largest within the last 500 years and this extreme climatic forcing provides a real test for climate models. A crucial parameter to assess in order to simulate this eruption is the aerosol size distribution, which strongly influences the radiative impact of the aerosols (through changes in albedo and residence time in the stratosphere, among others) and the impacts on dynamics and chemistry. The representation of this major forcing is done by using the AER-2D aerosol model which calculates the size distribution of the aerosols formed after the eruption. The modeling of the climatic impacts is then done by the state-of-the-art Chemistry-Climate model (CCM) SOCOL. The characteristics of the Tambora eruption and results from simulations made using the aerosol model/CCM, with an emphasis on the radiative and chemical implications of the large aerosol, will be shown. For instance, the specific absorption/scattering ratio of Mt.Tambora aerosols induced a large stratospheric warming which will be analyzed. The climatic impacts will also be discussed in regards of the high sedimentation rate of Mt. Tambora aerosols, leading to a fast decrease of the atmospheric optical depth in the first two years after the eruption. The link will be made between the modeling results and proxy-reconstructions as well as with available historical daily data from Geneva, Switzerland. Finally, insights on the contemporary response to this climatic extreme will be shown.

Arfeuille, F.; Rozanov, E.; Peter, T.; Weisenstein, D.; Hadorn, G.; Bodenmann, T.; Brönnimann, S.

2010-09-01

331

F-BF Summer Intern  

NSDL National Science Digital Library

This is a task from the Illustrative Mathematics website that is one part of a complete illustration of the standard to which it is aligned. Each task has at least one solution and some commentary that addresses important asects of the task and its potential use. Here are the first few lines of the commentary for this task: You have been hired for a summer internship at a marine life aquarium. Part of your job is diluting brine for the saltwater fish tanks. The brine is co...

332

Biology of the Mi-2/NuRD Complex in SLAC (Stemness, Longevity/Ageing, and Cancer)  

PubMed Central

The dynamic chromatin activities of Mi-2/Nucleosome Remodeling and Histone deacetylation (Mi-2/NuRD) complexes in mammals are at the basis of current research on stemness, longevity/ageing, and cancer (4-2-1/SLAC), and have been widely studied over the past decade in mammals and the elegant model organism, Caenorhabditis elegans. Interestingly, a common emergent theme from these studies is that of distinct coregulator-recruited Mi-2/NuRD complexes largely orchestrating the 4-2-1/SLAC within a unique paradigm by maintaining genome stability via DNA repair and controlling three types of transcriptional programs in concert in a number of cellular, tissue, and organism contexts. Thus, the core Mi-2/NuRD complex plays a central role in 4-2-1/SLAC. The plasticity and robustness of 4-2-1/SLAC can be interpreted as modulation of specific coregulator(s) within cell-specific, tissue-specific, stage-specific, or organism-specific niches during stress induction, ie, a functional module and its networking, thereby conferring differential responses to different environmental cues. According to “Occam’s razor”, a simple theory is preferable to a complex one, so this simplified notion might be useful for exploring 4-2-1/SLAC with a holistic view. This thought could also be valuable in forming strategies for future research, and could open up avenues for cancer prevention and antiageing strategies.

Zhang, Yue

2011-01-01

333

Design of an Optical Diffraction Radiation Beam Size Monitor at SLAC FETB  

SciTech Connect

We design a single bunch transverse beam size monitor which will be tested to measure the 28.5 GeV electron/positron beam at the SLAC FFTB beam line. The beam size monitor uses the CCD images of the interference pattern of the optical diffraction radiation from two slit edges which are placed close to the beam path. In this method, destruction of the accelerated electron/positron beam bunches due to the beam size monitoring is negligible, which is vital to the operation of the Linear Collider project.

Fukui, Yasuo; Cline, D.; Zhou, F.; Tobiyama, M.; Urakawa, J.; Bolton, P.R.; Ross, M.C.; Hamatsu, R.; Karataev, P.V.; Muto, T.; Aryshev, A.S.; Naumenko, G.A.; Potylitsyn, A.P.; /UCLA /KEK, Tsukuba /SLAC /Tokyo Metropolitan U., Math. Dept. /Tomsk Polytechnic U.

2008-03-17

334

Search for neutral, penetrating, metastable particles produced in the SLAC beam dump  

SciTech Connect

A search was made for neutral objects which might be produced by 20 GeV electrons incident on the SLAC beam dump, penetrate the downstream natural shielding, and decay upstream of an electromagnetic shower calorimeter. With about 30 coulombs of electrons dumped, no candidate events were found above an energy of approx. 2 GeV. Preliminary analysis implies the 95% confidence level limit on the product of mass and lifetime of light axion-like bosons decaying primarily into two photons to be greater than 0.8 keV-sec. Preliminary limits on photino parameters are also given.

Bjorken, J.

1984-03-01

335

Search for axion-like particles in the SLAC beam dump  

SciTech Connect

A search for axion-like particles was made at the Stanford Linear Accelerator Center (SLAC) by dumping 30 Coulombs of 20 GeV electrons into a beam absorption facility. After 179 meters of earth shielding the in-flight decay of the particle into two photons or an electron-positron pair, in a decay volume of 204 meters in length, was searched for with a fine-grained electromagnetic calorimeter. No positive signals were identified. Experimental limits were obtained for axions of mass up to {approximately} 200 MeV/c{sup 2}, and photinos of mass up to {approximately} 65 MeV/c{sup 2}.

Lu, B.

1987-01-01

336

Progress in L-Band Power Distribution System R&D at SLAC  

SciTech Connect

We report on the L-band RF power distribution system (PDS) developed at SLAC for Fermilab's NML superconducting test accelerator facility. The makeup of the system, which allows tailoring of the power distribution to cavities by pairs, is briefly described. Cold test measurements of the system and the results of high power processing are presented. We also investigate the feasibility of eliminating the expensive, lossy circulators from the PDS by pair-feeding cavities through custom 3-dB hybrids. A computational model is used to simulate the impact on cavity field stability due to the reduced cavity-to-cavity isolation.

Nantista, Christopher; Adolphsen, Chris; Wang, Faya; /SLAC

2008-10-20

337

Upgrade of the SLAC SLED II Pulse Compression System Based on Recent High Power Tests  

SciTech Connect

In the Next Linear Collider (NLC) it is expected that the high power rf components be able to handle peak power levels in excess of 400 MW. We present recent results of high power tests designed to investigate the RF breakdown limits of the X-band pulse compression system used at SLAC. (SLED-II). Results of these tests show that both the TE{sub 01}-TE{sub 10} mode converter and the 4-port hybrid have a maximum useful power limit of 220-250 MW. Based on these tests, modifications of these components have been undertaken to improve their peak field handling capability. Results of these modifications will be presented. As part of an international effort to develop a new 0.5-1.5 TeV electron-positron linear collider for the 21st century, SLAC has been working towards a design, referred to as 'The Next Linear Collider' (NLC), which will operate at 11.424 GHz and utilize 50-75 MW klystrons as rf power sources. One of the major challenges in this design, or any other design, is how to generate and efficiently transport extremely high rf power from a source to an accelerator structure. SLAC has been investigating various methods of 'pulse compressing' a relatively wide rf pulse ({ge} 1 {mu}s) from a klystron into a narrower, but more intense, pulse. Currently a SLED-II pulse compression scheme is being used at SLAC in the NLC Test Accelerator (NLCTA) and in the Accelerator Structures Test Area (ASTA) to provide high rf power for accelerator and component testing. In ASTA, a 1.05 {mu}s pulse from a 50 MW klystron was successfully pulse compressed to 205 MW with a pulse width of 150 ns. Since operation in NLC will require generating and transporting rf power in excess of 400 MW it was decided to test the breakdown limits of the SLED-II rf components in ASTA with rf power up to the maximum available of 400 MW. This required the combining of power from two 50 MW klystrons and feeding the summed power into the SLED-II pulse compressor. Results from this experiment demonstrated that two of the key components of SLED-II; the Magic Tee and the 'Flower Petal' mode converter (converts between TE{sub 10} rectangular and TE{sub 01} circular modes), were not robust enough at higher power levels. Because of this, a major effort is underway to upgrade the existing devices to operate stably at the higher power levels, and also to investigate new components, which have inherently low field enhancement in their design and therefore more robust.

Vlieks, A.E.; Fowkes, W.R.; Loewen, R.J.; Tantawi, S.G.; /SLAC

2011-09-06

338

Introduction to high-energy physics and the Stanford Linear Accelerator Center (SLAC)  

SciTech Connect

The type of research done at SLAC is called High Energy Physics, or Particle Physics. This is basic research in the study of fundamental particles and their interactions. Basic research is research for the sake of learning something. Any practical application cannot be predicted, the understanding is the end in itself. Interactions are how particles behave toward one another, for example some particles attract one another while others repel and still others ignore each other. Interactions of elementary particles are studied to reveal the underlying structure of the universe.

Clearwater, S.

1983-03-01

339

Requirements for use of nonmedical x-ray generators at SLAC  

SciTech Connect

The risks associated with use of x-ray equipment have long been recognized. While the relative frequency of x-ray damage is small, machine produced x-rays and large radiography sources continue to account for a large percentage of preventable radiation injuries reported worldwide. The intent of this report is to formalize SLAC's radiation safety program as it applies to radiation producing equipment (diffraction, fluorescence analysis and nondestructive testing). It does not apply to the two-mile linac, experimental areas or other x-ray producing equipment directly related to the high energy physics program. 4 refs., 3 figs., 1 tab.

Busick, D.D. (comp.)

1984-09-01

340

Inquiry science professional development combined with a science summer camp for immediate application  

Microsoft Academic Search

This study evaluated the effectiveness of an intensive three-week science institute for preservice and inservice elementary\\u000a teachers that was funded by an Eisenhower Professional Development grant and a Regents’ Initiative Research grant. The institute\\u000a was held in combination with a summer science camp for elementary children. Pre-and post-assessments indicated an increased\\u000a level of comfort with inquiry-based teaching, as well as

Gilbert Naizer; Glenda Love Bell; Keith West; Sharon Chambers

2003-01-01

341

LUCIFER status report: Summer 2006  

NASA Astrophysics Data System (ADS)

LUCIFER (LBT NIR Spectrograph Utility with Camera and Integral-Field Unit for Extragalactic Research) is a NIR spectrograph and imager for the LBT (Large Binocular Telescope) working in the wavelength range from 0.9 to 2.5 microns. Two instruments are built by a consortium of five German institutes (Landessternwarte Heidelberg (LSW), Max Planck Institut for Astronomy (MPIA), Max Planck Institut for Extraterrestric Physics (MPE), Astronomical Institut of the Ruhr-University Bochum (AIRUB) and Fachhochschule for Technics and Design Mannheim (FHTG). All major components for the first instrument have been manufactured or are in the final stage of procurement. While integration and testing of LUCIFER 1 started in spring 2006 at the MPIA in Heidelberg, the cryostat for LUCIFER 2 has been sent to the MPE in Garching for system integration tests of the MOS-unit and testing of the mask cabinet exchange. The control electronics for the basic instrument has been manufactured, the MOS control electronics has been integrated and is being debugged. The MOS control software is under development by AIRUB. Fabrication and integration of components for LUCIFER 2 have started.

Mandel, H. G.; Appenzeller, I.; Seifert, W.; Baumeister, H.; Dettmar, R.-J.; Feiz, C.; Gemperlein, H.; Germeroth, A.; Grimm, B.; Heidt, J.; Herbst, T.; Hofmann, R.; Jütte, M.; Knierim, V.; Laun, W.; Luks, T.; Lehmitz, M.; Lenzen, R.; Polsterer, K.; Quirrenbach, A.; Rohloff, R.-R.; Rosenberger, J.; Weiser, P.; Weisz, H.

2006-07-01

342

Summer Games Underway in Sydney  

NSDL National Science Digital Library

On Friday, nearly 11,000 athletes from 200 countries strode into the newly built Olympic Stadium in Sydney to open the 2000 Olympic Summer Games. Watched by a crowd of 110,000 and an estimated television audience this evening in the billions, the ceremony was filled with pomp, ceremony, fireworks, dancing, and everything else that might be expected. While due attention has been paid to the various elements of the ceremony and the athletes, press coverage has focused on two events at the opening. First, athletes from North and South Korea marched into the stadium under one unification banner to a standing ovation. Second, the Olympic flame was lit by Australian Olympian Cathy Freeman, who is of aboriginal descent. Preliminary events have already begun, and the games will continue until October 1.

De Nie, Michael W.

343

A Summer Program Designed to Educate College Students for Careers in Bioinformatics  

ERIC Educational Resources Information Center

A summer program was created for undergraduates and graduate students that teaches bioinformatics concepts, offers skills in professional development, and provides research opportunities in academic and industrial institutions. We estimate that 34 of 38 graduates (89%) are in a career trajectory that will use bioinformatics. Evidence from…

Krilowicz, Beverly; Johnston, Wendie; Sharp, Sandra B.; Warter-Perez, Nancy; Momand, Jamil

2007-01-01

344

A Summer Bridge Program for Underprepared First-Year Students: Confidence, Community, and Re-Enrollment  

ERIC Educational Resources Information Center

|This quasi-experimental, action-research study explored a five-week pre-enrollment initiative called the Pathways Summer Bridge (PSB) Program in the New College of Interdisciplinary Arts and Sciences at Arizona State University (ASU). Theoretically framed and developed using the six components of Tinto's (1993) longitudinal model of institutional

Suzuki, Anne; Amrein-Beardsley, Audrey; Perry, Nancy J.

2012-01-01

345

A Summer Program Designed to Educate College Students for Careers in Bioinformatics  

Microsoft Academic Search

A summer program was created for undergraduates and graduate students that teaches bioin- formatics concepts, offers skills in professional development, and provides research opportuni- ties in academic and industrial institutions. We estimate that 34 of 38 graduates (89%) are in a career trajectory that will use bioinformatics. Evidence from open-ended research mentor and student survey responses, student exit interview responses,

Beverly Krilowicz; Wendie Johnston; Sandra B. Sharp; Nancy Warter-Perez; Jamil Momand

2007-01-01

346

Reevaluation of the reconstruction of summer temperatures from melt features in Belukha ice cores, Siberian Altai  

Microsoft Academic Search

In a previous study, past summer temperatures were reconstructed from melt features in the Belukha ice core, Siberian Altai. We evaluated the climatic representativeness of net accumulation and melt features by comparing two Belukha ice cores retrieved at neighboring sites by different institutions and dated by different methods. Melt features in both cores showed a significant correlation, but the trends

Sachiko Okamoto; Koji Fujita; Hideki Narita; Jun Uetake; Nozomu Takeuchi; Takayuki Miyake; Fumio Nakazawa; Vladimir B. Aizen; Stanislav A. Nikitin; Masayoshi Nakawo

2011-01-01

347

Summer Learning Options U.S.A. A Guide for Foreign Nationals.  

ERIC Educational Resources Information Center

|Information is provided on U.S. summer learning offerings, such as courses, institutes, and workshops, that are open to foreign nationals but about which information is hard to find. While many of the courses and programs are strictly academic, others provide a cultural orientation to the United States, and some mix academic or vocational…

Connotillo, Barbara Cahn, Ed.; Chasan, Gail A., Ed.

348

Report on Summer Experimental Television Project. Work Incentive Program, July 1 to August 31, 1969.  

ERIC Educational Resources Information Center

|The summer television project was instituted to provide a period of exploration and experimentation during which the needs of the Wisconsin State Employment Service and the Work Incentive Program were examined. Television was primarily useful for self-evaluation and for demonstration or introduction of new programs. Several types of television…

Shult, Robert J.

349

Reevaluation of past summer temperature reconstruction by melt features in Belukha ice cores, Russian Altai  

Microsoft Academic Search

Past summer temperature has been reconstructed by melt features in Belukha ice core in a previous study. We evaluated a climatic representativeness of isotope, net accumulation and melt feature by comparing two Belukha ice cores retrieved by different institutions and dated by different methods. We find a significant correlation between seasonal changes in stable isotope in precipitation and air temperature.

S. Okamoto; K. Fujita; H. Narita; J. Uetake; N. Takeuchi; T. Miyake; F. Nakazawa; V. Aizen; S. Nikitin; M. Nakawo

2009-01-01

350

Higher Education Summer Schools: Evaluation of the Scheme in 2000. Report.  

ERIC Educational Resources Information Center

This report presents the findings of an evaluation of the operation of the Higher Education Summer Schools scheme in England, part of the Excellence in Cities initiative focusing on year 11 and 12 students. Data come from a study of the operation of the scheme in a selected sample of 16 higher education institutions through interviews of personnel…

Mason, Keith; Pye, David

351

A Summer Program Designed to Educate College Students for Careers in Bioinformatics  

ERIC Educational Resources Information Center

|A summer program was created for undergraduates and graduate students that teaches bioinformatics concepts, offers skills in professional development, and provides research opportunities in academic and industrial institutions. We estimate that 34 of 38 graduates (89%) are in a career trajectory that will use bioinformatics. Evidence from…

Krilowicz, Beverly; Johnston, Wendie; Sharp, Sandra B.; Warter-Perez, Nancy; Momand, Jamil

2007-01-01

352

PREFACE: 16th International Summer School on Vacuum, Electron, and Ion Technologies (VEIT 2009)  

Microsoft Academic Search

The International Summer School on Vacuum, Electron and Ion Technologies (VEIT) has been organized biennially since 1977 when the series of VEIT Schools was launched by the Institute of Electronics, Bulgarian Academy of Sciences with the aim to act as a forum for interchange and dissemination of knowledge and ideas on the latest developments in electron-, ion-, and plasma-assisted technologies.

Wolfhard Möller; Nikolay Guerassimov; Chavdar Ghelev

2010-01-01

353

Gallium arsenide digital integrated circuits for controlling SLAC CW-RF systems  

SciTech Connect

In order to fill the PEP and SPEAR storage rings with beams from the SLC linac and damping rings, precise control of the linac subharmonic buncher and the damping ring RF is required. Recently several companies have developed resettable GaAs master/slave D-type flip-flops which are capable of operating at frequencies of 3 GHz and higher. Using these digital devices as frequency dividers, one can phase shift the SLAC CW-RF systems to optimize the timing for filling the storage rings. We have evaluated the performance of integrated circuits from two vendors for our particular application. Using microstrip circuit techniques, we have built and operated in the accelerator several chassis to synchronize a reset signal from the storage rings to the SLAC 2.856 GHz RF and to phase shift divide-by-four and divide-by-sixteen frequency dividers to the nearest 350 psec bucket required for filling. 4 refs., 4 figs., 2 tabs.

Ronan, M.T.; Lee, K.L.; Corredoura, P.; Judkins, J.G.

1988-10-01

354

The UCLA/SLAC Ultra-High Gradient Cerenkov Wakefield Accelerator Experiment  

SciTech Connect

An experiment is planned to study the performance of dielectric Cerenkov wakefield accelerating structures at extremely high gradients in the GV/m range. This new UCLA/SLAC/USC collaboration will take advantage of the unique SLAC FFTB electron beam and its demonstrated ultra-short pulse lengths and high currents (e.g., {delta}{sub z} = 20 {micro}m at Q = 3 nC). The electron beam will be focused down and sent through varying lengths of fused silica capillary tubing with two different sizes: ID = 200 {micro}m/OD = 325 {micro}m and ID = 100 {micro}m/OD = 325 {micro}m. The pulse length of the electron beam will be varied in order to alter the accelerating gradient and probe the breakdown threshold of the dielectric structures. In addition to breakdown studies, we plan to collect and measure coherent Cerenkov radiation emitted from the capillary tube to gain information about the strength of the accelerating fields.

Thompson, M.C.; Badakov, H.; Rosenzweig, J.B.; Travish, G.; /UCLA; Hogan, M.; Ischebec, R.; Siemann, R.; Walz, D.; /SLAC; Scott, A.; /UC, Santa Barbara; Yoder, R.; /Manhattan Coll., Riverdale

2006-01-25

355

Production of high intensity electron bunches for the SLAC Linear Collider  

SciTech Connect

This thesis describes the design and performance of a high intensity electron injecfor for the SLAC Linear Collider. Motivation for the collider and the specifications for the injector are discussed. An analytic theory of the bunching and capture of electrons by rf fields is discussed in the limit of low space charge and small signal. The design and performance of SLAC's main injector are described to illustrate a successful application of this theory. The bunching and capture of electrons by rf fields are then discussed in the limit of high space charge and large signal, and a description of the design of the collider injector follows. In the limit of high space charge forces and large rf signals, the beam dynamics are considerably more complex and numerical simulations are required to predict particle motion. A computer code which models the longitudinal dynamics of electrons in the presence of space charge and rf fields is described. The results of the simulations, the resulting collider injector design and the various components which make up the collider injector are described. These include the gun, subharmonic bunchers, traveling-wave buncher and velocity-of-light accelerator section. Finally, the performance of the injector is described including the beam intensity, bunch length, transverse emittance and energy spectrum. While the final operating conditions differ somewaht from the design, the performance of the collider injector is in good agreement with the numerical simulations and meets all of the collider specifications. 28 refs.

James, M.B.

1987-08-01

356

From the {psi} to charmed mesons: Three years with the SLAC-LBL detector at SPEAR  

SciTech Connect

As I look back at the first three years or so at SPEAR, I consider this one of the most revolutionary or perhaps the most revolutionary, experiment in the 60 year history of particle physics. It certainly was the most exciting time, in a laboratory that is, that I have ever experienced. In my talk I will cover the period 1973--1976 which saw the discoveries of the {psi} and {psi}{prime} resonances the {chi} states and most of the Psion spectroscopy, the D{degree}, D{sup +}* charmed meson doublet as well as the D{degree}* and D{sup +}* doublet. I will also refer briefly to some more recent results. Most of the discoveries I will mention were made with the SLAC-LBL Magnetic Detector or ``MARK I`` which we operated at SPEAR from 1973 to 1976. In 1976 the MARK I was modified to include a ``Lead Glass Wall`` (LGW) for improved photon and electron detection. This involved a new physics group from LBL, who built the LGW, Lina Barbaro-Galtieri et al. as well as a continuing group from SLAC, Martin Perl and Gary Feldman et al. to provide continuity in the running of the MARK I and to continue the study of the anomalous e{mu}events which Martin found earlier and which eventually were identified as the signature of the {tau} lepton.

Goldhaber, G.

1992-06-01

357

From the. psi. to charmed mesons: Three years with the SLAC-LBL detector at SPEAR  

SciTech Connect

As I look back at the first three years or so at SPEAR, I consider this one of the most revolutionary or perhaps the most revolutionary, experiment in the 60 year history of particle physics. It certainly was the most exciting time, in a laboratory that is, that I have ever experienced. In my talk I will cover the period 1973--1976 which saw the discoveries of the {psi} and {psi}{prime} resonances the {chi} states and most of the Psion spectroscopy, the D{degree}, D{sup +}* charmed meson doublet as well as the D{degree}* and D{sup +}* doublet. I will also refer briefly to some more recent results. Most of the discoveries I will mention were made with the SLAC-LBL Magnetic Detector or MARK I'' which we operated at SPEAR from 1973 to 1976. In 1976 the MARK I was modified to include a Lead Glass Wall'' (LGW) for improved photon and electron detection. This involved a new physics group from LBL, who built the LGW, Lina Barbaro-Galtieri et al. as well as a continuing group from SLAC, Martin Perl and Gary Feldman et al. to provide continuity in the running of the MARK I and to continue the study of the anomalous e{mu}events which Martin found earlier and which eventually were identified as the signature of the {tau} lepton.

Goldhaber, G.

1992-06-01

358

Results of the SLAC LCLS Gun High-Power RF Tests  

SciTech Connect

The beam quality and operational requirements for the Linac Coherent Light Source (LCLS) currently being constructed at SLAC are exceptional, requiring the design of a new RF photocathode gun for the electron source. Based on operational experience at SLAC's GTF and SDL and ATF at BNL as well as other laboratories, the 1.6cell s-band (2856MHz) gun was chosen to be the best electron source for the LCLS, however a significant redesign was necessary to achieve the challenging parameters. Detailed 3-D analysis and design was used to produce near-perfect rotationally symmetric rf fields to achieve the emittance requirement. In addition, the thermo-mechanical design allows the gun to operate at 120Hz and a 140MV/m cathode field, or to an average power dissipation of 4kW. Both average and pulsed heating issues are addressed in the LCLS gun design. The first LCLS gun is now fabricated and has been operated with high-power RF. The results of these high-power tests are presented and discussed.

Dowell, D.H.; Jongewaard, E.; Limborg-Deprey, C.; Schmerge, J.F.; Li, Z.; Xiao, L.; Wang, J.; Lewandowski, J.; Vlieks, A.; /SLAC

2007-11-02

359

Ground motion measurements at the LBL Light Source site, the Bevatron and at SLAC  

SciTech Connect

This report describes the technique for measuring ground motion at the site of the 1.0 to 2.0 GeV Synchrotron Radiation Facility which was known as the Advanced Light Source (in 1983 when the measurements were taken). The results of ground motion measurements at the Light Source site at Building 6 at LBL are presented. As comparison, ground motion measurements were made at the Byerly Tunnel, the Bevatron, Blackberry Canyon, and SLAC at the Spear Ring. Ground Motion at the Light Source site was measured in a band from 4 to 100 Hz. The measured noise is primarily local in origin and is not easily transported through LBL soils. The background ground motion is for the most part less than 0.1 microns. Localized truck traffic near Building 6 and the operation of the cranes in the building can result in local ground motions of a micron or more for short periods of time. The background motion at Building 6 is between 1 and 2 orders of magnitude higher than ground motion in a quiet seismic tunnel, which is representative of quiet sites worldwide. The magnitude of the ground motions at SLAC and the Bevatron are comparable to ground motions measured at the Building 6 Light Source site. However, the frequency signature of each site is very different.

Green, M.A.; Majer, E.I.; More, V.D.; O'Connell, D.R.; Shilling, R.C.

1986-12-01

360

Rodale Institute  

NSDL National Science Digital Library

J.I. Rodale was into organic farming for many decades before it became a bit more "hip". The Rodale Institute has been doing research on organic farming versus conventional farming for over 60 years, and their website is aimed at farmers, gardeners, and the general public alike. The "New Farm" link is the online incarnation of their print publication that has been providing "farmer-to-farmer resources, articles and personal stories" for over 29 years. Under the "Tools" menu in New Farm, visitors and farmers can find a "Crop Conversion Calculator", "Organic Price Report", and "NewFarm Forums". The Crop Conversion Chart gives five choices of crops, soybeans, oats, corn, wheat, and barley to compare, and shows how many pounds of CO2 will be saved based on the number of acres planted organically, and how many cars would be removed from the world as a result. The "Nutrition" link presents visitors with "Research", "Organic News", and even book reviews. There is also an "Advocacy" heading with a request to support Farm to School funding "to boost health, students, farms".

361

Summer Splash. 1988 Wisconsin Summer Library Program Manual. Bulletin No. 8230.  

ERIC Educational Resources Information Center

A compilation of materials contributed by and developed with the cooperation of Wisconsin librarians and Ohio's 1987 summer reading program, this planning manual provides guidelines for planning and promoting summer programs for young people by librarians in the state of Wisconsin. The theme of the program, "Summer Splash," is intended to conjure…

Lamb, Donald K.; And Others

362

PLCO News, Spring/Summer 1999  

Cancer.gov

PLCO News, Spring/Summer 1999 Volume 2, Number 1 ----- Spring/Summer 1999 In the Spotlight Genevieve Joseph Genevieve Joseph is no stranger to clinical trials. Before joining the PLCO study, she enrolled in the Women's Health Initiative (WHI), a very

363

Lasting Consequences of the Summer Learning Gap  

ERIC Educational Resources Information Center

Prior research has demonstrated that summer learning rooted in family and community influences widens the achievement gap across social lines, while schooling offsets those family and community influences. In this article, we examine the long-term educational consequences of summer learning differences by family socioeconomic level. Using data…

Alexander, Karl L.; Entwisle, Doris R.; Olson, Linda Steffel

2007-01-01

364

Lasting Consequences of the Summer Learning Gap  

Microsoft Academic Search

Prior research has demonstrated that summer learning rooted in family and community influences widens the achievement gap across social lines, while schooling offsets those family and community influences. In this article, we examine the long-term educational consequences of summer learning differences by family socioeconomic level. Using data from the Baltimore Beginning School Study youth panel, we decompose achievement scores at

Karl L. Alexander; Doris R. Entwisle; Linda Steffel Olson

2007-01-01

365

A Sizzling Summer for the CBN  

Microsoft Academic Search

t's been another busy summer for the CBN. The 10-week summer component of the Behavioral Research Advancements in Neuroscience (BRAIN) Program was again a major success. Thirty undergradu- ates from historically underrepresented groups in the sciences took part in full- time research experiences in preparation for pursuing graduate training in neuro- science. CBN postdoctoral fellows served as mentors for several

Elliott Albers

366

Lynch Ferry Hatchery - Summer Steelhead, Final Report  

Microsoft Academic Search

This report presents the findings of the independent audit of the Lyons Ferry Hatchery (Summer Steelhead). Lyons Ferry Hatchery is located downstream of the confluence of the Palouse and Snake rivers, about 7 miles west of Starbuck, Washington. The hatchery is used for adult collection of fall chinook and summer steelhead, egg incubation of fall chinook, spring chinook, steelhead, and

1996-01-01

367

PLCO News, Spring/Summer 1999  

Cancer.gov

PLCO News, Spring/Summer 1999 Volume 2, Number 1 ----- Spring/Summer 1999 TABLE OF CONTENTS Notes from the NCI's PLCO Project Office Meet Amy SubarMeet Richard Hayes From Lab to Life Fecal Occult Blood Testing for Colorectal Cancer Clinical Trials

368

PLCO News, Spring/Summer 1999  

Cancer.gov

PLCO News, Spring/Summer 1999 Volume 2, Number 1 ----- Spring/Summer 1999 Cancer Information Services If you have a question about cancer, call and speak with a trained specialist at NCI's Cancer Information Service (CIS). The CIS operates a toll-free

369

PLCO News, Spring/Summer 1998  

Cancer.gov

PLCO News, Spring/Summer 1998 Volume 3, Number 1 ----- Spring/Summer 2000 Cancer Information Services If you have a question about cancer, call and speak with a trained specialist at NCI's Cancer Information Service (CIS). The CIS operates a toll-free

370

PLCO News, Spring/Summer 1998  

Cancer.gov

PLCO News, Spring/Summer 1998 Volume 1, Number 1 ----- Spring/Summer 1998 TABLE OF CONTENTS Notes from the NCI's PLCO Project Office What is the PLCO Trial?Why volunteer?Screening testsWhy two study groups? From Lab to Life

371

Summer Research Internships at Biosphere 2 Center.  

National Technical Information Service (NTIS)

Through the support of NASA's Mission to Planet Earth, Biosphere 2 Center hosted 10 research interns for a 10 week period during the summer of 1998. In addition, we were able to offer scholarships to 10 students for Columbia University summer field course...

1998-01-01

372

Summer Research Internships at Biosphere 2 Center.  

National Technical Information Service (NTIS)

Through the support of NASA's Mission to Planet Earth, Biosphere 2 Center hosted 11 research interns for 6 to 8 weeks each during the summer of 1997. In addition, we were able to offer scholarships to 14 students for Columbia University summer field cours...

D. Colodner K. Griffin W. S. Broecker

1997-01-01

373

A wandering Gondawanaland's impact on summer temperatures  

Microsoft Academic Search

The effect of the position of Gondawanaland on summer temperatures is examined with a coupled energy balance climate - sea ice model that includes the ice-albedo feedback. These temperatures are important in determining when ice-free conditions can exist near the south pole. Results show that when the land mass is centered on the south pole summer temperatures are warmer than

Tamara Shapiro Ledley

1988-01-01

374

Summer Programming in Rural Communities: Unique Challenges  

ERIC Educational Resources Information Center

|During the past several decades, child poverty rates have been higher in rural than in urban areas, and now 2.5 million children live in deep poverty in rural America. Studies indicate that poor children are most affected by the typical "summer slide." Summer programming has the ability to address the issues of academic loss, nutritional loss,…

Phillips, Ruthellen; Harper, Stacey; Gamble, Susan

2007-01-01

375

Information Technology Services Newsletter: Summer 2004  

Microsoft Academic Search

ITS Summer 2004 Newsletter\\u000aC O N T E N T S Campus Email -1 Maintenance Reminders, JES Email FAQ, EDUCAUSE Attendees - 2 CMST Summer Program, Upcoming Conferences, SMRT Workshops - 3 Two New Tablet PCs, ITS Acquires New Van, Kurzweil 3000 Workshop Recap - 4 Networking Update, ITS Student Employee Awards, Student Staff Accomplishments - 5 Faculty\\/Staff Technology

Mary Jo Orzech

2004-01-01

376

Temperature and ice layer trends in the summer middle atmosphere  

NASA Astrophysics Data System (ADS)

We present results from our LIMA model (Leibniz Institute Middle Atmosphere Model) which nicely reproduces mean conditions of the summer mesopause region and also mean characteristics of ice layers known as noctilucent clouds. LIMA nudges to ECMWF data in the troposphere and lower stratosphere which influences the background conditions in the mesosphere. We study temperature trends in the mesosphere at middle and polar latitudes and compared with temperature trends from satellites, lidar, and phase height observations. For the first time large observed temperature trends in the summer mesosphere can be reproduced and explained by a model. As will be shown, stratospheric ozone has a major impact on temperature trends in the summer mesosphere. The temperature trend is not uniform in time: it is moderate from 1961 (the beginning of our record) until the beginning of the 1980s. Thereafter, temperatures decrease much stronger until the mid 1990s. Thereafter, temperatures are nearly constant or even increase with time. As will be shown, trends in ozone and carbon dioxide explain most of this behavior. Ice layers in the summer mesosphere are very sensitive to background conditions and are therefore considered to be appropriate tracers for long term variations in the middle atmosphere. We use LIMA background conditions to determine ice layer characteristics in the mesopause region. We compare our results with measurements, for example with albedos from the SBUV satellites, and show that we can nicely reproduce observed trends. It turns out that temperature trends are positive (negative) in the upper (lower) part of the ice layer regime. This complicates an interpretation of NLC long term variations in terms of temperature trends.

Lübken, F.-J.; Berger, U.

2012-04-01

377

Summer with the Variable Stars  

NASA Astrophysics Data System (ADS)

This summer three undergraduate students worked with me on three projects using AAVSO light curves together with infrared light curves from the South Africa Astronomical Observatory. Sean Patterson, Bradley University junior, worked on O-C diagrams at different wavelengths, and in the process of doing this he rediscovered the Harrington effect. Carleton Miller, ISU junior, looked at the correlation of light curve shapes with mass loss rates from the infrared color index K-L to check whether the correlation discovered by Bowers and Kerr (P. F. Bowers, and F. J. Kerr, 1977, Astron. and Astrophys., 57, 115) (from OH maser data) holds for the IR color as well. Kevin Marasinghe, Cal Tech sophomore and Ames native, focused on methods for automating the predictions for the AAVSO, and devised a novel but physically well-grounded approach to this problem as well as some new and unexpected patterns in the light curves. In this presentation I will describe this "Mira Gang" and discuss their results.

Willson, Lee Anne

2001-06-01

378

The role of supersymmetry phenomenology in particle physics  

SciTech Connect

Supersymmetry phenomenology is an important component of particle physics today. I provide a definition of supersymmetry phenomenology, outline the scope of its activity, and argue its legitimacy. This essay derives from a presentation given at the 2000 SLAC Summer Institute.

Wells, James D.

2000-12-14

379

New Bunch Compressor Chicane for the SLAC Linac to Produce 30-FSEC, 30-KA, 30-GeV Electron Bunches.  

National Technical Information Service (NTIS)

We describe a new bunch compressor chicane for the SLAC linac, which will be used in conjunction with other existing systems, to generate 30-fsec long, 30-GeV electron bunches with up to 30-kA of peak current. The new compressor is a four-dipole chicane l...

P. J. Emma

2002-01-01

380

Electron transport of a Linac Coherent Light Source (LCLS) using the SLAC linac  

SciTech Connect

A linac configuration providing a low emittance high peak current electron beam is under study for a potential Linac Coherent Light Source (LCLS) based on the SLAC accelerator. The parameters of the final electron bunch are nearing the technological limits of present accelerators in both transverse and longitudinal phase space. In this note we describe a layout of the RF gun, linac, and bunch compressors to deliver the required bunch properties. We consider a bunch that is generated by an rf gun and accelerated to 7 GeV in 900 m of SLAC linac structure before it enters the wiggler. We assume that the rf gun generates a gaussian beam with an energy of 10 MeV, a population N = 6 {times} 10{sup 9}e{sup {minus}}, an rms length {sigma}{sub z} = 0.5 mm, an rms energy spread {sigma}{sub {delta}} = 0.2%, and normalized rms emittances {gamma}{epsilon}{sub x,y} = 3 mm-mrad. At the end of the linac, we require that the peak current {cflx I} {approx_gt} 2.5 kA and the peak-to-peak energy spread {Delta}{delta} {approx_lt} 0.2%. To obtain the required high peak current, we need to compress the bunch length by a factor greater than 10. In deciding at what position in the linac to compress we need to consider three issues: the longitudinal wakefield in the linac, this increases the beam`s energy spread and is harder to compensate with short bunches, the transverse wakefield and rf deflections in the linac, these increase the transverse emittance of the beam and are more severe for long bunches, and the effects of phase and current jitter which will change the bunch length and therefore the peak current of the beam. In this paper, we will describe how we compress the bunch to meet these three criteria. Then, we will briefly describe the bunch compressor optics and finally we will mention some details specific to the SLAC site.

Bane, K.L.; Raubenheimer, T.O.; Seeman, J.T.

1993-05-01

381

1998 Monbusho Summer Program in Japan  

NSF Publications Database

... Baker, Greg Andrew University of Notre Dame (Civil Engineering) Host Institute: University of Tokyo ... Stephanie Nova Southeastern University (Health Care Education) Host Institute: University of Tokyo ...

382

US/Russian Laboratory-to-Laboratory MPC&A at the RRC Kurchatov Institute.  

National Technical Information Service (NTIS)

Formal interactions with Kurchatov Institute (KI) began summer 1994 on material protection, control and accountability (MPC&A). Contracts were placed by LANL and Sandia with KI to implement a nuclear material accounting system and a physical security syst...

N. D. Bondarev V. Sukhoruchkin E. L. Melkof

1995-01-01

383

Optics Design for a Soft X-ray FEL at the SLAC A-Line  

SciTech Connect

LCLS capabilities can be significantly extended with a second undulator aiming at the soft x-ray spectrum (1-5 nm). To allow for simultaneous hard and soft x-ray operations, 14 GeV beams at the end of the LCLS accelerator can be intermittently switched into the SLAC A-line (the beam transport line to End Station A) where the second undulator may be located. In this paper, we discuss the A-line optics design for transporting the high-brightness LCLS beams using the existing tunnel. To preserve the high brightness of the LCLS beams, special attention is paid to effects of incoherent and coherent synchrotron radiation. Start-to-end simulations using realistic LCLS beam distributions are carried out.

Geng, H; Ding, Y.; Emma, P.; Huang, Z.; Nosochkov, Y.; Woodley, M.; /SLAC

2009-05-15

384

Measurements of ultimate accelerating gradients in the SLAC disk-loaded structure  

SciTech Connect

This paper is a status report on an on-going program at SLAC to study accelerator structures under high-gradient electric field conditions. The study is a part of a much broader program dealing with future linear colliders. The accelerating gradient that might be achievable in such machines is a crucial parameter because once the beam energy is selected, the gradient determines the length of the linac and directly or indirectly affects the choice of many other parameters. To reach 100 MV/m in a conventional 3 m constant-gradient section without SLED, one would need a klystron with a peak power output of 900 MW. Since such a tube is not available, we decided to use a short standing-wave section in which the resonant fields can build up. The design criteria for this section, the fabrication, matching and tuning, the experimental set-up and the results are described. 6 refs., 5 figs., 1 tab.

Wang, J.W.; Loew, G.A.

1985-03-01

385

An Ultra-High Gradient Cherenkov Wakefield Acceleration Experiment at SLAC FFTB  

SciTech Connect

The creation of ultra-high current, ultra-short pulse beams Q=3 nC, {sigma}{sub z} = 20{micro}m at the SLAC FFTB has opened the way for very high gradient plasma wakefield acceleration experiments. We study here the use of these beams in a proposed Cherenkov wakefield experiment, where one may excite electromagnetic wakes in a simple dielectric tube with inner diameter of few 100 microns that exceed the GV/m level. We discuss the scaling of the fields with design geometric design parameters, and choice of dielectric. We also examine measurable aspects of the experiment, such as the total coherent Cerenkov radiation energy one may collect, and the expected aspects of dielectric breakdown at high fields.

Rosenzweig, J.B.; Hoover, S.; Hogan, M.J.; Muggli, P.; Thompson, M.; Travish, G.; Yoder, R.; /UCLA /SLAC /Southern California U.

2005-08-02

386

600 kV modulator design for the SLAC Next Linear Collider Test Accelerator  

SciTech Connect

Preliminary design for the SLAC Next Linear Collider Test Accelerator (NLCTA) requires a pulse power source to produce a 600 kV, 600 A, 1.4 {mu}s, 0.1% flat top pulse with rise and fall times of approximately 100 ns to power an X-Band klystron with a microperveance of 1.25 at {approx} 100 MW peak RF power. The design goals for the modulator, including those previously listed, are peak modulator pulse power of 340 MW operating at 120 Hz. A three-stage darlington pulse-forming network, which produces a >100 kV, 1.4 {mu}s pulse, is coupled to the klystron load through a 6:1 pulse transformer. Careful consideration of the transformer leakage inductance, klystron capacitance, system layout, and component choice is necessary to produce the very fast rise and fall times at 600 kV operating continuously at 120 Hz.

Harris, K.; de Lamare, J.; Nesterov, V.; Cassel, R.

1992-07-01

387

The Linac Coherent Light Source at SLAC. Radiological Considerations and Shielding calculations  

SciTech Connect

The Linac Coherent Light Source (LCLS) at SLAC will be the world's first X-ray free electron laser when it becomes operational in 2009. Pulses of X-ray laser light from LCLS will be many orders of magnitude brighter and several orders of magnitude shorter than what can be produced by other X-ray sources available in the world. These characteristics will enable frontier new science in many areas. This paper describes the LCLS beam parameters and its lay-out. Results of the Monte Carlo calculations for the shielding design of the electron dump line, radiation damage to undulator, the residual radiation and the soil activation around the electron dump are presented.

Mao, X.S.; Fasso, A.; Nakao, N.; Rokni, S.H.; Vincke, H.; /SLAC

2005-12-02

388

Computer modelling of bunch-by-bunch feedback for the SLAC B-factory design  

SciTech Connect

The SLAC B-factory design, with over 1600 high current bunches circulating in each ring, will require a feedback system to avoid coupled-bunch instabilities. A computer model of the storage ring, including the RF system, wave fields, synchrotron radiation loss, and the bunch-by-bunch feedback system is presented. The feedback system model represents the performance of a fast phase detector front end (including system noise and imperfections), a digital filter used to generate a correction voltage, and a power amplifier and beam kicker system. The combined ring-feedback system model is used to study the feedback system performance required to suppress instabilities and to quantify the dynamics of the system. Results are presented which show the time development of coupled bunch instabilities and the damping action of the feedback system. 3 refs., 5 figs., 2 tabs.

Briggs, D.; Fox, J.D.; Hosseini, W.; Klaisner, L.; Morton, P.; Pellegrin, J.L.; Thompson, K.A. (Stanford Linear Accelerator Center, Menlo Park, CA (USA)); Lambertson, G. (Lawrence Berkeley Lab., CA (USA))

1991-05-01

389

A 2 to 4 nm high power FEL on the SLAC linac  

SciTech Connect

We report the results of preliminary studies of a 2 to 4 nm SASE FEL, using a photoinjector to produce the electron beam, and the SLAC linac to accelerate it to an energy up to 10 GeV. Longitudinal bunch compression is used to increases ten fold the peak current to 2.5 kA, while reducing the bunch length to the subpicosecond range. The saturated output power is in the multi-gigawatt range, producing about 10{sup 14} coherent photons within a bandwidth of about 0.2% rms, in a pulse of several millijoules. At 120Hz repetition rate the average power is about 1 W. The system is optimized for x-ray microscopy in the water window around 2 to 4 nm, and will permit imaging a biological sample in a single subpicosecond pulse.

Pellegrini, C.; Rosenzweig, J. [California Univ., Los Angeles, CA (United States). Dept. of Physics; Nuhn, H.D.; Pianetta, P.; Tatchyn, R.; Winick, H. [Stanford Univ., CA (United States). Stanford Synchrotron Radiation Lab.; Bane, K.; Morton, P.; Raubenheimer, T.; Seeman, J. [Stanford Linear Accelerator Center, Menlo Park, CA (United States); Halbach, K.; Kim, K.J. [Lawrence Berkeley Lab., CA (United States); Kirz, J. [State Univ. of New York, Stony Brook, NY (United States)

1992-09-01

390

Emittance Studies of the BNL/SLAC/UCLA 1.6 Cell Photocathode RF Gun  

SciTech Connect

The symmetrized 1.6 cell S-band photocathode gun developed by the BNL/SLAC/UCLA collaboration is in operation at the Brookhaven Accelerator Test Facility (ATF). A novel emittance compensation solenoid magnet has also been designed, built and is in operation at the ATF. These two subsystems form an emittance compensated photoinjector used for beam dynamics, advanced acceleration and free electron laser experiments at the ATF. The highest acceleration field achieved on the copper cathode is 150 MV/m, and the guns normal operating field is 130 MV/m. The maximum rf pulse length is 3 {mu}s. The transverse emittance of the photoelectron beam were measured for various injection parameters. The 1 nC emittance results are presented along with electron bunch length measurements that indicated that at above the 400 pC, space charge bunch lengthening is occurring. The thermal emittance, {epsilon}{sub o}, of the copper cathode has been measured.

Palmer, D.T.; /SLAC; Wang, X.J.; /Brookhaven; Miller, R.H.; /SLAC; Babzien, M.; Ben-Zvi, I.; /Brookhaven; Pellegrini, C.; /UCLA; Sheehan, J.; Skaritka, J.; /Brookhaven; Winick, H.; /SLAC; Woodle, M.; Yakimenko, V.; /Brookhaven

2011-09-09

391

Facility for Advanced Accelerator Experimental Tests at SLAC (FACET) Conceptual Design Report  

SciTech Connect

This Conceptual Design Report (CDR) describes the design of FACET. It will be updated to stay current with the developing design of the facility. This CDR begins as the baseline conceptual design and will evolve into an 'as-built' manual for the completed facility. The Executive Summary, Chapter 1, gives an introduction to the FACET project and describes the salient features of its design. Chapter 2 gives an overview of FACET. It describes the general parameters of the machine and the basic approaches to implementation. The FACET project does not include the implementation of specific scientific experiments either for plasma wake-field acceleration for other applications. Nonetheless, enough work has been done to define potential experiments to assure that the facility can meet the requirements of the experimental community. Chapter 3, Scientific Case, describes the planned plasma wakefield and other experiments. Chapter 4, Technical Description of FACET, describes the parameters and design of all technical systems of FACET. FACET uses the first two thirds of the existing SLAC linac to accelerate the beam to about 20GeV, and compress it with the aid of two chicanes, located in Sector 10 and Sector 20. The Sector 20 area will include a focusing system, the generic experimental area and the beam dump. Chapter 5, Management of Scientific Program, describes the management of the scientific program at FACET. Chapter 6, Environment, Safety and Health and Quality Assurance, describes the existing programs at SLAC and their application to the FACET project. It includes a preliminary analysis of safety hazards and the planned mitigation. Chapter 7, Work Breakdown Structure, describes the structure used for developing the cost estimates, which will also be used to manage the project. The chapter defines the scope of work of each element down to level 3.

Amann, J.; Bane, K.; /SLAC

2009-10-30

392

Radiation Safety Aspects of the Linac Coherent Light Source Project At SLAC  

SciTech Connect

The Linac Coherent Light Source (LCLS) is a Self-Amplified Spontaneous Emission based Free Electron Laser (FEL) that is being designed and built at the Stanford Linear Accelerator Center (SLAC) by a multilaboratory collaboration. This facility will provide ultra-short pulses of coherent x-ray radiation with the fundamental harmonic energy tunable over the energy range of 0.82 to 8.2 keV. One-third of the existing SLAC LINAC will compress and accelerate the electron beam to energies ranging from 4.5 GeV to 14.35 GeV. The beam will then be transported through a 130-meter long undulator, emit FEL and spontaneous radiation. After passing through the undulator, the electron beam is bent to the main electron dump. The LCLS will have two experiment halls as well as x-ray optics and infrastructure necessary to make use of the FEL for research and development in a variety of scientific fields. The facility design will incorporate features that would make it possible to expand in future such that up to 6 independent undulators can be used. While some of the radiation protection issues for the LCLS are similar to those encountered at both high-energy electron linacs and synchrotron radiation facilities, LCLS poses new challenges as well. Some of these new issues include: the length of the facility and of the undulator, the experimental floor in line with the electron beam and the occupancy near zero degrees, and the very high instantaneous intensity of the FEL. The shielding design criteria, methodology, and results from Monte Carlo and analytical calculations are presented.

Rokni, S.H.; Fasso, A.; Mao, S.; Vincke, H.; /SLAC /LCLS

2005-07-06

393

A Proof-Of-Principle Echo-Enabled Harmonic Generation Experiment at SLAC  

SciTech Connect

In this paper we describe the technical design of an ongoing proof-of-principle echo-enabled harmonic generation (EEHG) experiment at the Next Linear Collider Test Accelerator (NLCTA) at SLAC.We present the design considerations and the technical details of the experiment. Recently a new method, entitled echo-enabled harmonic generation, was proposed for generation of high harmonics using the beam echo effect. In an EEHG free electron laser (FEL), an electron beam is energy modulated in a modulator and then sent through a dispersive section with a high dispersion strength. After this first stage, the modulation obtained in the modulator is macroscopically washed out, while simultaneously introducing complicated fine structure (separated energy bands) into the phase space of the beam. A second laser is used to further modulate the beam energy in a second modulator. After passing through a second dispersive section, the separated energy bands will be converted into current modulation and the echo signal then occurs as a recoherence effect caused by the mixing of the correlations between the modulation in the second modulator and the fine structures in the beam. The EEHG scheme has a remarkable up-frequency conversion efficiency; it has been shown that the EEHG FEL scheme may allow generation of soft x-rays directly from a UV seed laser in a single stage. In order to confirm the physics behind the EEHG technique and benchmark the theory, a proof-of-principleEEHG experimentwas planned at SLAC. The experiment is now in a commissioning stage and the preliminary results are reported in a separate paper of these proceedings. In this paper we present the design considerations and the details of the experiment setup.

Dunning, Michael; /SLAC; Colby, Eric; /SLAC; Ding, Yuantao; /SLAC; Frederico, Joel; /SLAC; Gilevich, Sasha; /SLAC; Hast, Carsten; /SLAC; Jobe, R.; /SLAC; McCormick, Douglas; /SLAC; Nelson, Janice; /SLAC; Raubenheimer, Tor; /SLAC; Soong, Ken; /SLAC; Stupakov, Gennady; /SLAC; Szalata, Zenon; /SLAC; Walz, Dieter; /SLAC; Weathersby, Stephen; /SLAC; Woodley, Mark; /SLAC; Xiang, Dao; /SLAC; Corlett, John; /LBL, Berkeley; Penn, Gregory; /LBL, Berkeley; Prestemon, Soren; /LBL, Berkeley; Qiang, Ji; /LBL, Berkeley /LBL, Berkeley /LBL, Berkeley /LBL, Berkeley /LPHE, Lausanne

2011-05-20

394

77 FR 5228 - Summer Food Service Program; 2012 Reimbursement Rates  

Federal Register 2010, 2011, 2012, 2013

...December 31, 2012. Summer Food Service Program...a)(3)(B)). Summer Food Service Program...3)). Rates are higher for sponsors of sites...nearest quarter-cent. Summer Food Service Program...B. Russell National School Lunch Act (42...

2012-02-02

395

75 FR 3197 - Summer Food Service Program; 2010 Reimbursement Rates  

Federal Register 2010, 2011, 2012, 2013

...December 31, 2010. Summer Food Service Program...a)(3)(B)). Summer Food Service Program...3)). Rates are higher for sponsors of sites...nearest quarter-cent. Summer Food Service Program...B. Russell National School Lunch Act, as...

2010-01-20

396

50 CFR 648.103 - Summer flounder accountability measures.  

Code of Federal Regulations, 2012 CFR

...false Summer flounder accountability measures. 648.103 Section 648.103 ...NORTHEASTERN UNITED STATES Management Measures for the Summer Flounder Fisheries § 648.103 Summer flounder accountability measures. (a) Commercial sector EEZ...

2012-10-01

397

Missense mutations in the globular tail of myosin-Va in dilute mice partially impair binding of Slac2-a/melanophilin.  

PubMed

The well-known coat-color mutant mouse dilute exhibits a defect in melanosome transport, and although various mutations in the myosin-Va gene, which encodes an actin-based motor protein, have been identified in dilute mice, why missense mutations in the globular tail of myosin-Va, a putative cargo-binding site, cause the dilute phenotype (i.e. lighter coat color) has never been elucidated. In this study we discovered that missense mutations (I1510N, M1513K and D1519G) in the globular tail (GT) of myosin-Va partially impair the binding of Slac2-a/melanophilin, a linker protein between myosin-Va and Rab27A on the melanosome. The myosin-Va-GT-binding site in Slac2-a was mapped to the region (amino acids 147-240) adjacent to the N-terminal Rab27A-binding site, but it is distinct from the myosin-Va-exon-F-binding site (amino acids 320-406). The myosin-Va-GT.Slac2-a interaction was much weaker than the myosin-Va-exon-F.Slac2-a interaction. The missense mutations in the GT found in dilute mice abrogated only the myosin-Va-GT.Slac2-a interaction and had no effect on the myosin-Va-exon-F.Slac2-a interaction. We further showed that expression of green fluorescence protein-tagged Slac2-a lacking the myosin-Va-GT-binding site (DeltaGT), but not the wild-type Slac2-a, severely inhibits melanosome transport in melan-a cells, especially at the melanosome transfer step from microtubles to actin filaments (i.e. perinuclear aggregation of melanosomes). On the basis of our findings, we propose that myosin-Va interacts with Slac2-a.Rab27A complex on the melanosome via two distinct domains, both of which are essential for melanosome transport in melanocytes. PMID:14730011

Fukuda, Mitsunori; Kuroda, Taruho S

2004-02-01

398

Camouflage Printing of Nomex Summer Flying Coveralls.  

National Technical Information Service (NTIS)

An investigation was carried out to determine the effectiveness of Nomex summer flying coveralls printed with a camouflage pattern as compared with the standard plain olive green coveralls. Laboratory tests indicated that camouflage printing of staple Nom...

M. A. Chianta

1966-01-01

399

Endless Summer: Managing Character in Coastal Communities.  

National Technical Information Service (NTIS)

These proceedings present essays and workshop session notes from a three-day conference held in October 2004, entitled Endless Summer: Managing Character in Coastal Communities. The event brought together over 120 community members and people from across ...

2004-01-01

400

Summer Aerospace Workforce Development Research Internship Project  

NASA Website

[Students Higher Education] [Available: Nationally] SAWDRIP is a 10-week, summer internship in which students are placed in state-of-the-art projects with aerospace companies to provide skills marketable to both NASA and aerospace companies that ...

401

Earth-Sun Geometry: Summer Solstice Animation  

NSDL National Science Digital Library

The representation depicts the position of the Earth relative to the Sun during the northern hemisphere's summer solstice and includes line of latitude and the angle of the Sun's rays at the Tropic of Cancer.

Pidwirny, Michael; Okanagan, Scott J.

402

Is Summer Reading Itself an Old Adage?  

ERIC Educational Resources Information Center

|Maintains that traditional summer reading assignments discourage students' pleasurable responses to reading; based on a paper presented at annual convention of National Council of Teachers of English (59th, Washington, D.C., November 29, 1969). (RD)|

Lockerbie, D. Bruce

1970-01-01

403

Report to DHS on Summer Internship 2006  

SciTech Connect

This summer I worked at Lawrence Livermore National Laboratory in a bioforensics collection and extraction research group under David Camp. The group is involved with researching efficiencies of various methods for collecting bioforensic evidence from crime scenes. The different methods under examination are a wipe, swab, HVAC filter and a vacuum. The vacuum is something that has particularly gone uncharacterized. My time was spent mostly on modeling and calculations work, but at the end of the summer I completed my internship with a few experiments to supplement my calculations. I had two major projects this summer. My first major project this summer involved fluid mechanics modeling of collection and extraction situations. This work examines different fluid dynamic models for the case of a micron spore attached to a fiber. The second project I was involved with was a statistical analysis of the different sampling techniques.

Beckwith, R H

2006-07-26

404

Make A Splash: Tracking the Summer Olympics.  

ERIC Educational Resources Information Center

A four-week third-grade class study of the Summer Olympics is described. Activities for studying the host and participating countries were incorporated through map, social studies, art, mathematics, and language arts activities. (CB)

Perlmutter, Alexa E.

1988-01-01

405

Summer Undergraduate Breast Cancer Research Program.  

National Technical Information Service (NTIS)

The Summer Undergraduate Breast Cancer Research Program (SUBCRP) at the Univ. of Missouri- Columbia (MU) supported 4 students in 2003. These students participated in faculty-mentored research projects for eight weeks and participated in seminars, brown-ba...

W. R. Folk L. Blockus

2004-01-01

406

A wandering Gondawanaland's impact on summer temperatures  

Microsoft Academic Search

The effect of the position of Gondawanaland on summer temperatures is examined with a coupled energy balance climate-sea ice model that includes the ice-albedo feedback. These temperatures are important in determining when ice-free conditions can exist near the south pole. Results show that when the land mass is centered on the south pole summer temperatures are warmer than when the

Tamara Shapiro Ledley

1988-01-01

407

Summer anoestrus in buffalo--a review.  

PubMed

The present review addresses summer anoestrus in buffaloes. The condition is a major impediment in the improvement of reproductive as well as productive efficiency in buffalo. Factors affecting summer anoestrus include environment, nutrition and management. The environmental factors especially longer day length and increased temperature with high humidity pre-dispose to the condition when the nutritive status of buffaloes is poor. Buffaloes with summer anoestrus fail to exhibit oestrus as a result of aberration in the endocrine profile leading to ovarian inactivity. Increased day length with high environmental temperature causes hyper-prolactinaemia, suppressing the secretion of gonadotrophins, which leads to an alteration in ovarian steroidogenesis. Heat stress produced during summer also affects folliculogenesis, follicular fluid microenvironment and oocyte quality. A large number of hormonal regimens have been used with varying degree of efficacy in terms of oestrus induction and conception rate. A combined strategy of improvement in environment, nutrition and management is pre-requisite for hormonal manipulation in order to improve productivity in summer anoestrus buffaloes. A brief description of summer anoestrus with special reference to factors responsible, endocrinology, deleterious effects on reproductive system and possible remedial measures is presented in this review. PMID:20345589

Das, G K; Khan, F A

2010-12-01

408

Scientific teaching targeting faculty from diverse institutions.  

PubMed

We offered four annual professional development workshops called STAR (for Scientific Teaching, Assessment, and Resources) modeled after the National Academies Summer Institute (SI) on Undergraduate Education in Biology. In contrast to the SI focus on training faculty from research universities, STAR's target was faculty from community colleges, 2-yr campuses, and public and private research universities. Because of the importance of community colleges and 2-yr institutions as entries to higher education, we wanted to determine whether the SI model can be successfully extended to this broader range of institutions. We surveyed the four cohorts; 47 STAR alumni responded to the online survey. The responses were separated into two groups based on the Carnegie undergraduate instructional program categories, faculty from seven associate's and associate's-dominant institutions (23) and faculty from nine institutions with primarily 4-yr degree programs (24). Both groups expressed the opinion that STAR had a positive impact on teaching, student learning, and engagement. The two groups reported using techniques of formative assessment and active learning with similar frequency. The mix of faculty from diverse institutions was viewed as enhancing the workshop experience. The present analysis indicates that the SI model for training faculty in scientific teaching can successfully be extended to a broad range of higher education institutions. PMID:24006387

Gregg, Christopher S; Ales, Jo Dale; Pomarico, Steven M; Wischusen, E William; Siebenaller, Joseph F

2013-01-01

409

Academic Institutional Profiles  

NSF Publications Database

... Academic Institutional Profiles: 2002 The Academic Institutional Profiles are produced annually by ... in statistical tables within each Profile. Individual Profiles can be selected using either an ...

410

Transformative Professional Development: Inquiry-Based College Science Teaching Institutes  

ERIC Educational Resources Information Center

|Two Summer Institutes funded by the National Science Foundation were held for current and future college science faculty. The overall goal was to promote learning and practice of inquiry-based college science teaching. We developed a collaborative and active learning format for participants that involved all phases of the 5E learning cycle of…

Zhao, Ningfeng; Witzig, Stephen B.; Weaver, Jan C.; Adams, John E.; Schmidt, Frank

2012-01-01

411

Transformative Professional Development: Inquiry-Based College Science Teaching Institutes  

ERIC Educational Resources Information Center

Two Summer Institutes funded by the National Science Foundation were held for current and future college science faculty. The overall goal was to promote learning and practice of inquiry-based college science teaching. We developed a collaborative and active learning format for participants that involved all phases of the 5E learning cycle of…

Zhao, Ningfeng; Witzig, Stephen B.; Weaver, Jan C.; Adams, John E.; Schmidt, Frank

2012-01-01

412

Design Studies for Flux and Polarization Measurements of Photons and Positrons for SLAC Proposal E166--An Experiment to Test Polarized Positron Production in the FFTB.  

National Technical Information Service (NTIS)

We present results from design studies carried out to investigate measurements of the flux, spectrum and polarization of undulator photons for SLAC Proposal E166. A transmission Compton polarimeter is considered for measuring the photon circular polarizat...

M. Woods Y. Batygin K. C. Moffeit J. C. Sheppard

2002-01-01

413

CIM Academy Summer School: A Report of the Evaluation of the 2000 Summer School.  

ERIC Educational Resources Information Center

|The Certificate of Initial Mastery (CIM) Academy summer school in Portland, Oregon, is a public school program that provides additional support to students in grades 5 through 8 who are not meeting state and district standards in reading and mathematics. Summer 2000 was the second year of this program, and this session benefited from the…

King, Fredrick; Kobak, Jared

414

Halting the Summer Achievement Slide: A Randomized Field Trial of the KindergARTen Summer Camp  

ERIC Educational Resources Information Center

In this randomized field trial of KindergARTen Camp, a 6-week summer enrichment program in literacy and the fine arts, we analyzed the summer learning outcomes of 93 treatment and 35 control students from high-poverty schools in Baltimore, Maryland. This experiment offers evidence concerning the causal effect of the program on 5 measures of…

Borman, Geoffrey D.; Goetz, Michael E.; Dowling, N. Maritza

2009-01-01

415

Development in Mexico and Central America. Fulbright-Hays Summer Seminars Abroad Program. Summer 1991.  

ERIC Educational Resources Information Center

|This document features writings and curriculum projects by teachers who traveled to Mexico and Central America in the summer of 1991 as members of a Fulbright-Hays Summer Seminar. The following items are among the 20 included: Curriculum Project: "'Escritoras Mexicanas Contemporaneas': A Survey of Mexican Women Fiction Writers" (Laura J. Beard);…

Institute of International Education, New York, NY.

416

Parker Migrant Summer Story. A Report from Parker Summer School Migrant Program: Kindergarten Through Grade Six.  

ERIC Educational Resources Information Center

|Before the beginning of the summer school, a workshop was held for the teachers and aides to present ways to: (1) make migrant and American Indian children more aware of their heritage and (2) help them become more familiar with career possibilities. Objectives of the summer program were: (1) career exploration; (2) cultural enrichment (i.e.,…

Pollard, Merel E., Comp.

417

All Aboard for Summer Fun! Departing 1993: Louisiana Summer Reading Program 1993 Manual.  

ERIC Educational Resources Information Center

This manual for the 1993 Louisiana Summer Reading Program has ideas for libraries to get the summer program started. The theme is trains, and all of the ideas have something to do with this theme. The following topics are covered: (1) evaluation; (2) promotion, publicity, and programs; (3) calendar; (4) decorating the library; (5) storytime…

White, Dorothy J., Ed.

418

Research and development toward a 4.5?1.5 Å linac coherent light source (LCLS) at SLAC  

Microsoft Academic Search

In recent years significant studies have been initiated on the feasibility of utilizing a portion of the 3 km S-band accelerator at SLAC to drive a short wavelength (4.5?1.5 Å) Linac Coherent Light Source (LCLS), a Free-Electron Laser (FEL) operating in the Self-Amplified Spontaneous Emission (SASE) regime. Electron beam requirements for single-pass saturation in a minimal time include: 1) a

R. Tatchyn; J. Arthur; M. Baltay; K. Bane; R. Boyce; M. Cornacchia; T. Cremer; A. Fisher; S.-J. Hahn; M. Hernandez; G. Loew; R. Miller; W. R. Nelson; H.-D. Nuhn; D. Palmer; J. Paterson; T. Raubenheimer; J. Weaver; H. Wiedemann; H. Winick; C. Pellegrini; G. Travish; E. T. Scharlemann; S. Caspi; W. Fawley; K. Halbach; K.-J. Kim; R. Schlueter; M. Xie; D. Meyerhofer; R. Bonifacio; L. De Salvo

1996-01-01

419

Single shot characterization of subpicosecond and ultra-relativistic compressed electron bunches at the SLAC SPPS experiment  

Microsoft Academic Search

Next-generation X-ray free electron lasers (XFEL's) such as the Linac Coherent Light Source at the Stanford Linear Accelerator Center (SLAC) will offer users the ability to study ultrafast time-dependent phenomena with sub-100fs resolution at atomic length scales. Many proposed applications, such as pump-probe experiments, will require the synchronization of an external light source with the XFEL. To take full advantage

Adrian Cavalieri; David M. Fritz; Soo-Heyong Lee; Philip H. Bucksbaum; David A. Reis; Holger Schlarb; Jerome Hastings

2004-01-01

420

Interlaced Beams of Unequal Energy and Pulse Length in th SLAC Linac for PEP-II and Experiment E-158  

Microsoft Academic Search

The two experiments, BaBar (PEP-II) and E-158, require quite different beams in the linac at the Stanford Linear Accelerator Center, SLAC. The first needs damped beams from the damping rings and low energies at the extraction points from the main linac. For E-158, an undamped, polarized beam bypasses the damping rings, and gets accelerated to energies of 45.6 and 48.7

F.-J. Decker; Franz-Josef

2002-01-01

421

PEP-N: A 0.8 GeV x 3.1-GeV Collider at SLAC.  

National Technical Information Service (NTIS)

The PEP-N project is a proposed new e+e- collider at SLAC to operate in the center of mass energy range of 1.0 GeV to 3.1 GeV. PEP-N consists of a new Very Low Energy electron Ring VLER (< 800 MeV) to collide with the PEP-II e+ Low Energy Ring LER (3.1 Ge...

Y. Cai

2002-01-01

422

Lynch Ferry Hatchery - Summer Steelhead, Final Report  

SciTech Connect

This report presents the findings of the independent audit of the Lyons Ferry Hatchery (Summer Steelhead). Lyons Ferry Hatchery is located downstream of the confluence of the Palouse and Snake rivers, about 7 miles west of Starbuck, Washington. The hatchery is used for adult collection of fall chinook and summer steelhead, egg incubation of fall chinook, spring chinook, steelhead, and rainbow trout and rearing of fall chinook, spring chinook, summer steelhead, and rainbow trout. The audit was conducted in April 1996 as part of a two-year effort that will include 67 hatcheries and satellite facilities located on the Columbia and Snake River system in Idaho, Oregon, and Washington. The hatchery operating agencies include the US Fish and Wildlife Service, Idaho Department of Fish and Game, Oregon Department of Fish and Wildlife, and Washington Department of Fish and Wildlife.

Watson, M.

1996-05-01

423

NASA planetary science summer school application  

NASA Astrophysics Data System (ADS)

NASA is accepting applications from science and engineering post doctoral and graduate students for its 18th Annual Planetary Science Summer School, which will hold two sessions this summer (24-28 July and 31 July 31-4 August) at the Jet Propulsion Laboratory in Pasadena, Calif. During the summer school, student teams will carry out the equivalent of an early concept study in response to a selected NASA Announcement of Opportunity, prepare a proposal authorization review presentation, present it to a review board, and receive feedback. At the end of the week, students will have a clearer understanding of the life cycle of a space mission; relationships between mission design, cost, and schedule; and the trade-offs necessary to stay within cost and schedule while preserving the quality of science.

2006-05-01

424

Report of the CACT Summer Conference  

NASA Astrophysics Data System (ADS)

After thirteen years of summer nomadic activity, the California Association of Chemistry Teachers (CACT) returned to Asilomar, CA, for the annual summer conference. Mary Virginia Orna, College of New Rochelle, gave the keynote address on Archeology and Chemistry, later supported by two lectures by Cecily Gryzwacz on Pollution in the Museum Environment and Museum Conservation Chemistry. The main theme of the four-day conference centered around a short course on Material Sciences by Margaret Geselbracht, Reed College, Portland, OR with a supporting workshop by Ludwig Mayer, California State University, San Jose, CA and Wade Killingsworth, El Camino College, Torrence, CA. Next year's summer conference at Asilomar is rescheduled for August 16-21, 1996. Please write to the undersigned for details.

Dev, Vasu

1996-02-01

425

Modelling the Asian summer monsoon using CCAM  

NASA Astrophysics Data System (ADS)

A ten-year mean (1989-1998) climatology of the Asian summer monsoon is studied using the CSIRO Conformal-Cubic Atmospheric Model (CCAM) to downscale NCEP reanalyses. The aim of the current study is to validate the model results against previous work on this topic, in order to identify model strengths and weaknesses in simulating the Asian summer monsoon. The model results are compared with available observations and are presented in two parts. In the first part, the mean summer rainfall, maximum and minimum temperatures and winds are compared with the observations. The second part focuses on validation of the monsoon onset. The model captures the mean characteristics such as the cross-equatorial flow of low-level winds over the Indian Ocean and near the Somali coast, rainfall patterns, onset indices, northward movements, active-break and revival periods.

Nguyen, Kim Chi; McGregor, John L.

2009-02-01

426

Notre Dame Science graduate spends summer working on conservation at Kings Park  

Microsoft Academic Search

2008 Bachelor of Science graduate, Andrew Naskos, was awarded a $7000 summer scholarship with the Biodiversity Conservation Centre (BCC) at Kings Park.\\u000aThe Centre, located at one of Western Australia's most iconic and valuable landmarks, is an institute for cutting edge research into biodiversity conservation. Mr Naskos undertook a collaborative research project as part of his undergraduate degree at the

Michelle Ebbs

2009-01-01

427

Blending of economic, reduced oxygen, summer gasoline  

US Patent & Trademark Office Database

Provided is a novel summer gasoline composition which is substantially free of oxygenates, contains less than 20 ppm sulfur, and is in compliance with the California Predictive Model. The gasoline composition is suitable for use in the summer, i.e., having a Reid vapor pressure of 7.0 or less, but also offers the advantages of low-emissions while being substantially free of oxygenates. The method for blending the gasoline comprises blending streams from a refinery in a controlled manner to maintain compliance with the California Predictive Model.

2006-09-05

428

Passive Performance Monitoring and Traffic Characteristics on the SLAC Internet Border  

SciTech Connect

Understanding how the Internet is used by HEP is critical to optimizing the performance of the inter-lab computing environment. Typically use requirements have been defined by discussions between collaborators. However, later analysis of the actual traffic has shown this is often misunderstood and actual use is significantly different to that predicted. Passive monitoring of the real traffic provides insight into the true communications requirements and the performance of a large number of inter-communicating nodes. It may be useful in identifying performance problems that are due to factors other than Internet congestion, especially when compared to other methods such as active monitoring where traffic is generated specifically to measure its performance. Controlled active monitoring between dedicated servers often gives an indication of what can be achieved on a network. Passive monitoring of the real traffic gives a picture of the true performance. This paper will discuss the method and results of collecting and analyzing flows of data obtained from the SLAC Internet border. The unique nature of HEP traffic and the needs of the HEP community will be highlighted. The insights this has brought to understanding the network will be reviewed and the benefit it can bring to engineering networks will be discussed.

Logg, Connie A

2002-05-01

429

Performance of the PEP-II B-Factory Collider at SLAC  

SciTech Connect

PEP-II is an e{sup +}e{sup -} asymmetric B-Factory Collider located at SLAC operating at the Upsilon 4S resonance (3.1 GeV x 9 GeV). It has reached a luminosity of 9.21 x 10{sup 33}/cm{sup 2}/s and has delivered an integrated luminosity of 710 pb{sup -1} in one day. PEP-II has delivered, over the past six years, an integrated luminosity to the BaBar detector of over 262 fb{sup -1}. PEP-II operates in continuous injection mode for both beams boosting the integrated luminosity. The peak positron current has reached 2.45 A in 1588 bunches. Steady progress is being made in reaching higher luminosity. The goal over the next several years is to reach a luminosity of 2.1 x 10{sup 34}/cm{sup 2}/s. The accelerator physics issues being addressed in PEP-II to reach this goal include the electron cloud instability, beam-beam effects, parasitic beam-beam effects, high RF beam loading, shorter bunches, lower {beta}*{sub y} interaction region operation, and coupling control. Figure 1 shows the PEP-II tunnel.

Seeman, J.; Browne, M.; Cai, Y.; Colocho, W.; Decker, F.J.; Donald, M.H.; Ecklund, S.; Erickson, R.A.; Fisher, A.S.; Fox, J.D.; Heifets, S.A.; Iverson, R.H.; Kulikov, A.; Li, N.; Novokhatski, A.; Ross, M.C.; Schuh, P.; Smith, T.J.; Sonnad, K.G.; Stanek, M.; Sullivan, M.K.; /SLAC /Frascati /DSM, DAPNIA, Saclay /LBL, Berkeley /Orsay, IPN

2006-03-03

430

Preliminary Results from the UCLA/SLAC Ultra-High Gradient CerenkovWakefield Accelerator Experiment  

SciTech Connect

The first phase of an experiment to study the performance of dielectric Cerenkov wakefield accelerating structures at extremely high gradients in the GV/m range has been completed. This experiment takes advantage of the unique SLAC FFTB electron beam and its demonstrated ultra-short pulse lengths and high currents (e.g., {sigma}{sub z} = 20 {micro}m at Q = 3 nC). The FFTB electron beam has been successfully focused down and sent through varying lengths of fused silica capillary tubing with two different sizes: ID = 200 {micro}m/OD = 325 {micro}m and ID = 100 {micro}m/OD = 325 {micro}m. The pulse length of the electron beam was varied in the range 20 {micro}m < {sigma}{sub z} < 100 {micro}m which produced a range of electric fields between 2 and 20 GV/m at the inner surface of the dielectric tubes. We observed a sharp increase in optical emissions from the capillaries in the middle part of this surface field range which we believe indicates the transition between sustainable field levels and breakdown. If this initial interpretation is correct, the surfaced fields that were sustained equate to on axis accelerating field of several GV/m. In future experiments we plan to collect and measure coherent Cerenkov radiation emitted from the capillary tube to gain more information about the strength of the accelerating fields.

Thompson, M.C.; Badakov, H.; Rosenzweig, J.B.; Travish, G.; /UCLA; Hogan, M.; Ischebeck, R.; Kirby, N.; Siemann, R.; Walz, D.; /SLAC; Muggli, P.; /Southern California U.; Scott, A.; /UC, Santa Barbara; Yoder, R.; /Manhattan Coll., Riverdale

2008-02-06

431

Lattice Design of PEP-X as a Light Source Machine at SLAC  

SciTech Connect

SLAC is studying an option of building a high brightness synchrotron light source machine, PEP-X, in the existing PEP-II tunnel [1]. The new machine will replace the PEPII High Energy Ring (HER) with the goal of achieving an ultra low emittance of {approx} 0.1 nm-rad at 4.5 GeV. The PEPX will utilize the same layout as in the PEP-II with 6 arcs and 6 long straight sections. The existing RF and injection systems will be re-used. The two HER FODO arcs will be replaced with the DBA arcs providing 30 dispersion free 4.26 m sections for magnetic undulators. The other four arcs will be replaced with the TME lattice for attaining the low emittance. Finally, a 89.3 m long damping wiggler with 10 cm period and 1.5 T maximum magnetic field will be installed in a long straight section to reduce the natural emittance to 0.094 nm-rad. The PEP-X dynamic aperture was studied and found sufficient for a vertical injection.

Wang, Min-Huey; Cai, Yunhai; Hettel, Robert; Nosochkov, Yuri; /SLAC

2008-07-03

432

ILC @ SLAC R&D Program for a Polarized RF Gun  

SciTech Connect

Photocathode rf guns produce high-energy low-emittance electron beams. DC guns utilizing GaAs photocathodes have proven successful for generating polarized electron beams for accelerators, but they require rf bunching systems that significantly increase the transverse emittance of the beam. With higher extraction field and beam energy, rf guns can support higher current densities at the cathode. The source laser system can then be used to generate the high peak current, relatively low duty-factor micropulses required by the ILC without the need for post-extraction rf bunching. The net result is that the injection system for a polarized rf gun can be identical to that for an unpolarized rf gun. However, there is some uncertainty as to the survivability of an activated GaAs cathode in the environment of an operating rf gun. Consequently, before attempting to design a polarized rf gun for the ILC, SLAC plans to develop an rf test gun to demonstrate the rf operating conditions suitable for an activated GaAs cathode.

Clendenin, J.E.; Brachman, A.; Dowell, D.H.; Garwin, E.L.; Ioakemidi, K.; Kirby, R.E.; Maruyama, T.; Miller, R.A.; Prescott, C.Y.; Wang, J.W.; /SLAC; Lewellen, J.W.; /Argonne; Prepost, R.; /Wisconsin U., Madison

2006-01-25

433

Recent Measurements And Plans for the SLAC Compton X-Ray Source  

SciTech Connect

A compact source of monoenergetic X-rays, generated via Compton backscattering, has been developed in a collaboration between U.C Davis and SLAC. The source consists of a 5.5 cell X-band photoinjector, a 1.05 m long high gradient accelerator structure and an interaction chamber where a high power (TW), short pulse (sub-ps) infrared laser beam is brought into a nearly head-on collision with a high quality focused electron beam. Successful completion of this project will result in the capability of generating a monoenergetic X-ray beam, continuously tunable from 20 - 85 keV. We have completed a series of measurements leading up to the generation of monoenergetic X-rays. Measurements of essential electron beam parameters and the techniques used in establishing electron/photon collisions will be presented. We discuss the design of an improved interaction chamber, future electro-optic experiments using this chamber and plans for expanding the overall program to the generation of Terahertz radiation.

Vlieks, A.E.; Akre, R.; Caryotakis, G.; DeStefano, C.; Frederick, W.J.; Heritage, J.P.; Luhmann, N.C.; Martin, D.; Pellegrini, C.; /SLAC /UC, Davis /UCLA

2006-02-14

434

Feasibility of Diffraction Radiation for a Non-invasive Diagnostics of the SLAC Electron Beam  

SciTech Connect

The development of the non-invasive bunch size diagnostics based on the diffraction radiation is now in progress in frame of TPU-KEK-SLAC collaboration. The experimental test of a transverse beam size measurement was performed successful on the KEK-ATF extracted electron beam. However many difficulties emerge if we going from the one GeV electron energy to the several tenth GeV electron beams. The extremely high Lorenz-factor value gives rise to the some problems, such as large contribution of a radiation from an accelerator construction elements in submillimeter wavelength region, extremely pre-wave zone effect even in the optical range, exceeding of the electron beam divergence over the diffraction radiation cone, and so on. More over, the sensitivity of the method based on the optical diffraction radiation from flat slit target decrease catastrophic when an electron energy increase up to several tenth GeV. We suggest the new method based on the phase shift on the slit target, consisting on the two semi-planes which are turned at a some angle one to other (crossed target technique) and present here the results of experimental test of this technique. Also we discuss the origins of indicated difficulties and suggest the ways of these problems solution.

Naumenko, G.; Potylitsyn, A.; /Tomsk Polytechnic U.; Araki, S.; Aryshev, A.; Hayano, H.; Karataev, P.; Muto, T.; Urakawa, J.; /KEK, Tsukuba; Ross, M.; /SLAC; Cline, D.; Fukui, Y.; /UCLA; Hamatsu, R.; /Tokyo Metropolitan U.

2006-05-16

435

PLIC signal voltages in the SLAC accelerator scaled to the SLC arcs  

SciTech Connect

To detect conditions and to forestall events in which an electron or positron beam might otherwise melt a hole in its SLC arc vacuum chamber, and to provide information on the magnitude and location of these and other, less harmful, beam losses, it is planned to install two PLIC cables along each arc, one on each side of the magnet string. A similar system (but with one long ion chamber) has been in use at SLAC for 20 years. Electromagnetic shower calculations have been made to estimate the ion chamber signals which will be produced in the new system, making use of data from the old system. It is estimated that a potentially damaging beam loss in an SLC arc will give rise to an ion chamber signal pulse with an amplitude on the order of 2 to 5 volts. Depending upon the location of a beam loss, sensitivity may vary from its average value by as much as 40%. Most of this signal is due to charged particles in the electromagnetic shower that are able to escape the magnetic field and reach PLIC.

Jenkins, T.M.; Nelson, W.R.; Reagan, D.D.

1986-06-16

436

Semiconductor High-Level Dosimeters Used in the SLAC Mixed Gamma and Neutron Fields  

SciTech Connect

As part of an exploration of Semiconductor High-Level Dosimetry (SHLD) in the accelerator radiation fields, the response of SHLD system, composed of dual MOSFETs, wide-base PIN diode, and a microprocessor-controlled reader, was calibrated in photon (Co-60) and neutron (Bare-reactor) fields. The response curves for the MOSFET and the PIN diode were determined. The neutron sensitivity of the PIN diode is about a factor of 2200 times higher than its photon sensitivity. Therefore, the PIN diode can be used to measure the neutron dose and virtually ignore the photon dose contribution. The MOSFET can be used to estimate the photon dose after subtracting the ionizing effect of the neutrons. The SHLD was used in the SLAC mixed field to measure the photon and neutron doses around a copper beam dump. The photon measurements near the copper dump agreed reasonably with the FLUKA Monte Carlo calculations. The neutron measurements agreed with FLUKA calculations to within a factor of two.

Mao, Stan

2003-09-03

437

A Fast and Accurate Phasing Algorithm for the RF Accelerating Voltages of the SLAC Linac  

SciTech Connect

The RF phases, defined as the phases between the crests of the RF accelerating voltages and the accelerated beam, must be controlled within a few degrees in the linac of the SLAC Linear Collider (SLC). Changes in the RF phases not only affect the available acceleration but more importantly modify the dynamics of the accelerated beam, e.g. the beam optics. Precision phase control is therefore crucial for maintaining high beam quality. We present a fast and accurate algorithm to determine the effective RF phase for groups of eight klystrons in the linac, the so-called sub-booster phase. The new phasing method was implemented in 1997 and it was used to routinely determine all linac sub-booster phases in about 2 minutes with a typical accuracy of 2 degrees. Using this algorithm a day-night variation of the linac master phase reference that was indicated by beam measurements in 1996 was directly confirmed and the online compensation verified.

Bogart, Joanne R

2003-04-29

438

Development of Modulator Pulse Stability Measurement Device and Test Results at SLAC  

SciTech Connect

In this paper, the development of a pulse stability measurement device is presented. The measurement accuracy is better than 250uV, about 4.2ppm of a typical 60V input pulse. Pulse signals up to +/- 80V peak can be measured. The device works together with an oscilloscope. The primary function of the measurement device is to provide a precision offset, such that variations in the flattop of the modulator voltage pulse can be accurately resolved. The oscilloscope records the difference between the pulse flattop and the reference for a series of waveforms. The scope math functions are utilized to calculate the rms variations over the series. The frequency response of the device is characterized by the measured cutoff frequency of about 6.5MHz. In addition to detailing the design and calibration of the precision pulse stability device, measurements of SLAC line-type linac modulators and recently developed induction modulators will be presented. Factors affecting pulse stability will be discussed.

Huang, C.; Burkhart, C.; Kemp, M.; Morris, B.; Beukers, T.; Ciprian, R.; Nguyen, M.; /SLAC

2011-08-19

439

A Proof-of-Principle Echo-enabled Harmonic Generation Free Electron Laser Experiment at SLAC  

SciTech Connect

With the advent of X-ray Free Electron Lasers (FELs), new methods have been developed to extend capabilities at short wavelengths beyond Self-Amplified Spontaneous Emission (SASE). In particular, seeding of a FEL allows for temporal control of the radiation pulse and increases the peak brightness by orders of magnitude. Most recently, Gennady Stupakov and colleagues at SLAC proposed a new technique: Echo-Enabled Harmonic Generation (EEHG). Here a laser microbunches the beam in an undulator and the beam is sheared in a chicane. This process is repeated with a second laser, undulator and chicane. The interplay between these allows a seeding of the X-ray laser up to the 100th harmonic of the first laser. After introducing the physics of FELs and the EEHG seeding technique, we describe contributions to the experimental effort. We will present detailed studies of the experiment including the choice of parameters and their optimization, the emittance effect, spontaneous emission in the undulators, the second laser phase effect, and measurements of the jitter between RF stations. Finally, the status and preliminary results of the Echo-7 experiment will be outlined.

Pernet, Pierre-Louis; /Ecole Polytechnique, Lausanne /SLAC

2012-01-06

440

THE JOINT EUROPEAN-UNITED STATES NDEA INSTITUTE FOR ADVANCED STUDY, MANNHEIM-HEIDELBERG.  

ERIC Educational Resources Information Center

|THE EUROPEAN COORDINATOR AND RESIDENT CO-DIRECTOR OF THE MANNHEIM-HEIDELBERG BRANCH OF THE SUMMER 1966 LANGUAGE INSTITUTE IN FRANCE AND GERMANY PREPARED THIS EVALUATION OF THE INTERNATIONAL VENTURE. DESIGNED TO ANALYZE THE INNOVATIONAL ASPECTS OF THE 1966 INSTITUTE WITH THE IDEA OF STRENGTHENING THE EFFECTIVENESS OF THIS AND SIMILAR PROGRAMS, THE…

VAN TESLAAR, A.P.

441

Promoting Youth Development and Community Involvement with Technology: The Long Beach YMCA CORAL Youth Institute  

Microsoft Academic Search

The Long Beach YMCA CORAL Youth Institute is an innovative program that uses technology as a mechanism for promoting positive youth development and technology skills while enhancing school and life success among low-income, culturally-diverse, urban high school students. This article describes the Youth Institute and explores program outcomes on participants from the 2003 Intensive Summer Program (N = 37). Results

Julie ODonnell; Jo Ann R. Coe-Regan

2006-01-01

442

TILT: The Institute for Learning & Teaching School Reform through Community-Based Teams.  

ERIC Educational Resources Information Center

In the summer of 1993, more that 55 educators from across the United States attended The Institute for Learning and Teaching (TILT) at the Massachusetts Institute of Technology (MIT) in Cambridge (Massachusetts). Teachers, school administrators, and their champions in the community joined MIT students, professors, and professionals from…

Breisch, Linda; Medina, Noe

443

Change Agent Research on the BANA-Can/Am Summer Camp for Young People with Eating Disorders.  

ERIC Educational Resources Information Center

This document reports on the model and method used to design, implement, coordinate, and evaluate a summer camp for young people with eating disorders. The basic approach used at the camp is described as the Sports Institute for Research model, a systems analysis model which focuses on: (1) the ultimate goal or mission; (2) obstacles or problems…

Moriarty, Dick; And Others

444

Emergency Immigration Education Act Programs. Summer ESL Welcome Program for Students of Limited English Proficiency, Summer Bilingual Program, Projects Omega, Wise, and Bell. Summer 1994. OER Report.  

ERIC Educational Resources Information Center

|The Emergency Immigration Education Act supported three distinct programs in New York City in the summer of 1994: (1) the Summer English as a Second Language (ESL) Welcome Program for Students of Limited English Proficiency; (2) the Summer Bilingual Program; and (3) Projects Omega, Wise, and Bell. The projects served 3,443 students in all. The…

Roman, Elliott M.

445

Remedial Online Teaching on a Summer Course  

ERIC Educational Resources Information Center

|This paper is based on experiences with remedial online learning from a national collaboration initiative in the Netherlands involving the University of Amsterdam, Erasmus Rotterdam University and Maastricht University (www.web-spijkeren.nl). The central question is how prior knowledge tests and online remedial summer courses can contribute to…

Rienties, Bart; Tempelaar, Dirk; Waterval, Dominique; Rehm, Martin; Gijselaers, Wim

2006-01-01

446

APS Forum on Education Summer 2006 Newsletter  

NSDL National Science Digital Library

The APS Forum on Education (FEd) Summer 2006 Newsletter's Teacher Preparation Section articles included:The Learning Assistant Model for Teacher Education in Science and Technology by Valerie Otero,Undergraduate Learning Assistants at the University of Arkansas by Gay Stewart, andCreating and Sustaining a Teaching and Learning Professional Community at Seattle Pacific University by Lane Seeley and Stamatis Vokos.

2007-09-07

447

Dropout Interviews: Summer, 1982, Final Technical Report.  

ERIC Educational Resources Information Center

|In the summer of 1982, the Austin Independent School District (AISD) Office of Research and Evaluation (ORE) conducted a survey of dropouts. Dropouts are defined in this study as students who withdrew from AISD schools prior to receiving their high school diploma and are not known to have attended other schools. The dropouts were interviewed to…

Austin Independent School District, TX. Office of Research and Evaluation.

448

Cotton production in rotation with summer legumes  

Technology Transfer Automated Retrieval System (TEKTRAN)

Sunn hemp (Crotolaria juncea) is a fast growing tropical legume that can accumulate large amounts of biomass and N in a relatively short period of time during the summer in the southeastern US. This study was conducted to evaluate the potential of using this legume as an N source for cotton (Gossypi...

449

Undergraduate Research Summer Fellowships Undergo Change  

Microsoft Academic Search

At the 22nd Annual Council Meeting of Council on Undergraduate Research (CUR), held this past June at the College of Wooster, the general council voted to make fundamental changes to the Undergraduate Research Summer Fellowship Program. The most important change is that awards will no longer be made to individual students. Instead, awards will be made to individual faculty member

Timothy E. Elgren

2000-01-01

450

Chinese Summer Schools Sell Quick Credits  

ERIC Educational Resources Information Center

|American-style summer programs in China, catering to Chinese-born students, have taken American universities by surprise. They are yet one more player in the complex and often opaque Chinese education industry, an industry in which American colleges are finding themselves increasingly entwined. These programs have become a booming enterprise,…

McMurtrie, Beth; Farrar, Lara

2013-01-01

451

The summer I learned to write.  

PubMed

A summer course in English grammar challenged a registered nurse student to learn new behaviors and acquire effective writing skills. A confident nursing writer now, the author shares her experience for registered nurse students who continue to face some of the same challenges. PMID:7665745

Scholler-Jaquish, A

452

Summer High School Apprenticeship Research Program (SHARP).  

National Technical Information Service (NTIS)

The summer of 1997 will not only be noted by NASA for the mission to Mars by the Pathfinder but also for the 179 brilliant apprentices that participated in the SHARP Program. Apprentice paritcipation increased 17% over last year's total of 153 participant...

1997-01-01

453

SHARP (Summer High School Apprenticeship Research Program).  

National Technical Information Service (NTIS)

The Year 2002 was another successful year for SHARP. Even after 22 years of SHARP, the Program continues to grow. There were 12 NASA Field Installations with a total of 210 apprentices who participated in the summer 2002 Program supported by 215 mentors i...

2002-01-01

454

"Aspire!" A Summer Program in Reading Enrichment.  

ERIC Educational Resources Information Center

Describes a high school summer reading program that was developed to encourage a lifelong habit of reading for pleasure by assembling a booklist of fiction and nonfiction titles, each sponsored by an administrator or teacher who then led a discussion of that book in the fall. (LRW)

Tanis, Robin S.

2003-01-01

455

What I Did on My Summer Vacation  

ERIC Educational Resources Information Center

A summer academy for high school students was developed--With a two week session and small class sizes, the academy provided an environment for teachers to address standards while promoting lasting change in students approach to their education. An effort to engage parents with the book "The 7 Habits of Highly Effective Teens" is sought so they…

Wenk, Michael

2005-01-01

456

Physics Meets Biology (LBNL Summer Lecture Series)  

SciTech Connect

Summer Lecture Series 2006: If scientists could take advantage of the awesomely complex and beautiful functioning of biologys natural molecular machines, their potential for application in many disciplines would be incalculable. Nobel Laureate and Director of the Lawrence Berkeley National Laboratory Steve Chu explores Possible solutions to global warming and its consequences.

Chu, Steve (Director, LBNL)

2006-07-01

457

International Summer Program in Railroad Engineering  

Microsoft Academic Search

The railroad industry has identified a need for engineers as many will be retiring over the next few years and freight rail traffic is predicted to increase. The challenge is finding engineers from university campuses, where careers and education in railroad engineering have been forgotten. Michigan Tech University saw a unique opportunity for innovative six-credit summer program that combines introductory

Pasi Lautala

2006-01-01

458

Report on Fulbright Summer Seminar on Indonesia.  

ERIC Educational Resources Information Center

This resource packet was compiled by a participant in the Fulbright Summer Seminar on Indonesia. The materials provide information for teaching about the diaspora of Hinduism and Islamic beliefs throughout the southeast Asia archipelagoes and their influence on art and culture. The handouts supplement information on Indonesia as part of an Asian…

Christenson, Charles Elroy

459

Scope on the Skies: Summer astronomy  

NSDL National Science Digital Library

Re-visit the summer of 2004 by discovering its celestial events and learning about the Cassini/Huygens spacecraft activity that also occurred that year--which has implications today as it continues to orbit the Saturnian system until 2008, through this issue's Scope on the Skies column.

Riddle, Bob

2004-05-01

460

Report on Fulbright Summer Seminar on Indonesia.  

ERIC Educational Resources Information Center

|This resource packet was compiled by a participant in the Fulbright Summer Seminar on Indonesia. The materials provide information for teaching about the diaspora of Hinduism and Islamic beliefs throughout the southeast Asia archipelagoes and their influence on art and culture. The handouts supplement information on Indonesia as part of an Asian…

Christenson, Charles Elroy

461

Summer schools on the amateur radio computing  

Microsoft Academic Search

Summer schools in computer science dedicated for pre-university students and their teachers would increase the number of decisions for studying CS. With adding a variety of computer-related amateur radio communications, we introduce excitement for learning and having fun in CS profession.

Miroslav S. Skoric

2007-01-01

462

Summer-Time Fun and Learning.  

ERIC Educational Resources Information Center

The newsletter for parents of handicapped children focuses on summer activities which provide fun and learning without undue expense or effort. Suggestions include encouraging reading activities (including visiting the library, reading out loud, selective television viewing, making a book, and writing letters). Activities to encourage the child's…

Murphy, Linda; Della Corte, Suzanne

1988-01-01

463

Mars Odyssey: Water Ice-Summer Observations  

NSDL National Science Digital Library

NASAs Mars Odyssey detected water ice in the northern hemisphere. During the winter months, the icy soil is covered by a thick layer of carbon dioxide (dry ice) frost obscuring the water ice signature.This animation is match-framed to #2778 and #2779. It shows the areas of ice during a martian summer.

Kekesi, Alex; Shirah, Greg; Zuber, Maria; Smith, David; Neumann, Gregory

2003-07-03

464

Summer-Time Fun and Learning.  

ERIC Educational Resources Information Center

|The newsletter for parents of handicapped children focuses on summer activities which provide fun and learning without undue expense or effort. Suggestions include encouraging reading activities (including visiting the library, reading out loud, selective television viewing, making a book, and writing letters). Activities to encourage the child's…

Murphy, Linda; Della Corte, Suzanne

1988-01-01

465

Information Technology Services Newsletter: Summer 2005  

Microsoft Academic Search

ITS Summer 2005 Newsletter\\u000aC O N T E N T S Gene Spafford, Technology Survey - 1 Faculty\\/Staff Technology Initiative Update - 2 Interactive Pen Display Workshop, Updates, Data Storage Procedures - 3 SLN Update, Tech Events, New Staff - 4 Staff News - 5 ITS A TEAM Concept - 6 Diane White - 7 Franziska Frey - 8

Mary Jo Orzech

2005-01-01

466

Information Technology Services Newsletter: Summer 2002  

Microsoft Academic Search

ITS Newsletter for Summer 2002:\\u000aContents:\\u000aMacromedia Flash, Graphs, Charts, and Tables in Excel, Camcorders at Media Services, CIT 2002 - 1 ITSS Faculty\\/Staff Workshops, Director Training Sessions-2 Help Desk Update, Supported Software Update, SUNY Tech Conference 2002, Consider Visual Studies - 3 ITSS General Information - 4

Mary Jo Orzech

2002-01-01

467

A River Summer on the Hudson  

Microsoft Academic Search

River Summer is a month-long faculty development program extending from the continental shelf off New York City to the headwaters of the Hudson in the Adirondack Mountains. During the program, faculty from the Environmental Consortium of Hudson Valley Colleges and Universities teach each other about the Hudson environment, using innovative methods of teaching and learning, with a focus on incorporation

T. C. Kenna; S. Pfirman; B. Selleck; L. Son; M. Land; J. Cronin

2006-01-01

468

SUMMER ANNUAL GRASSES: PROBLEMS AND CONTROL  

Microsoft Academic Search

Summer annual grasses also cause losses to the grower other than reduction of stand longevity. Alfalfa yield can be substantially reduced; yield decreases of one to two tons per acre frequently occur. Hay quality is greatly reduced; the grasses involved typically have only 8% to 10% protein compared to about 22% for good alfalfa and they may be very fibrous

Robert F. Norris; Carl A. Schoner

469

Summer diarrhoea in African infants and children  

Microsoft Academic Search

Of 70 black South African infants and children with acute summer diarrhoea, 30 (43%) were infected with enteropathogenic serogroups of Escherichia coli (EPEC), 13 (19%) with enterotoxigenic Gram-negative bacilli, 12 (17%) with Salmonella sp., 6 (9%) with Shigella sp., and 3 (4%) with rotaviruses. 13 (19%) patients were infected simultaneously with more than one enteropathogen, and no pathogen was detected

R M Robins-Browne; C S Still; M D Miliotis; N J Richardson; H J Koornhof; I Freiman; B D Schoub; G Lecatsas; E Hartman

1980-01-01

470

Utilization of summer legumes as bioenergy feedstocks  

Technology Transfer Automated Retrieval System (TEKTRAN)

Sunn hemp (Crotolaria juncea), is a fast growing, high biomass yielding tropical legume that may be a possible southeastern bioenergy crop. When comparing this legume to a commonly grown summer legume—cowpeas (Vigna unguiculata), sunn hemp was superior in biomass yield and subsequent energy yield. S...

471

Summer Student Breast Cancer Research Training Program.  

National Technical Information Service (NTIS)

The purpose of the breast cancer research training program is to recruit and train potential future researchers in breast cancer research. From a total of 90 applications for summer research, we selected a total of five students. During the 12 week progra...

G. P. Zaloga

2005-01-01

472

Women and ROTC Summer Camp, 1975.  

National Technical Information Service (NTIS)

Female cadets attending the 1975 ROTC Advanced Summer Camp at Fort Bragg, N.C., were rated lower than male cadets on leadership performance by their platoon officer evaluators. Ratings by NCO evaluators did not differ for male and female cadets. While fem...

E. S. Mohr G. P. Rowan R. F. Reidy

1978-01-01

473

Interracial imitation at a summer camp  

Microsoft Academic Search

Collected imitation data at week-long summer camp sessions involving prolonged and intimate contact between Black children and White children of equal status. As part of an initiation ceremony, 57 Black and 55 White 8-12 yr olds observed the behavior of unfamiliar Black adult and White adult models responding to the commands of an Indian chief. In 3 separate camp sessions,

Warren O. Eaton; Gerald L. Clore

1975-01-01

474

What Is Summer Vacation Costing Us?  

ERIC Educational Resources Information Center

|This paper explores the standard traditional summer vacation model; this includes the accompanying food insecurity, loss of nutrition and the lost knowledge that must be re-taught at the beginning of each new academic year. It compares the number of academic days attended in various Industrialized Nations compared to the United States. Also,…

Henkel, Tara

2010-01-01

475

UNM\\/LANL Volcanology Summer Field Course  

Microsoft Academic Search

The Volcanology Summer Field Course, taught jointly by volcanologists from the University of New Mexico and Los Alamos National Laboratory, has instructed over 140 undergraduate and graduate students from 15 countries since 1992. The course consists of nine graded field exercises conducted in diverse volcanic rocks of the Miocene to Quaternary-age Jemez Volcanic Field and Valles caldera, with excursions to

A. van Eaton; F. Goff; T. P. Fischer; W. Baldridge; S. Semken

2007-01-01

476

The Simeon Cadre in Formation, Summer 1970.  

ERIC Educational Resources Information Center

|This report explicates the concrete group development of a cadre of persons from Simeon High School, the University of Chicago, and the Board of Education in the summer sector of the Ford Training and Placement Program. The report is organized around crucial indices of group development, i.e., the problem of leadership. Data were collected from…

Sharpo, Calvin

477

Facilitator's Manual: Summer Transitions. Fifth Edition.  

ERIC Educational Resources Information Center

|A facilitator's manual for the Summer Transition Enrichment Program at Bowling Green State University is presented. The overall objectives of the program are: (1) to facilitate the transition of entering freshmen into the academic and cultural life of the university; and (2) to assist students in their personal growth and adjustment to the…

Kuenzli, Linda A., Ed.

478

Associated Western Universities summer participant program at the Lawrence Livermore National Laboratory, Summer 1997  

SciTech Connect

The Associated Western Universities, Inc. (AWU) supports a student summer program at Lawrence Livermore National Laboratory (LLNL). This program is structured so that honors undergraduate students may participate in the Laboratory`s research program under direct supervision of senior Laboratory scientists. Included in this report is a list of the AWU participants for the summer of 1997. All students are required to submit original reports of their summer activities in a format of their own choosing. These unaltered student reports constitute the major portion of this report.

Williams, B.

1997-08-01

479

A 10-Year Review of the Food Science Summer Scholars Program: A Model for Research Training and for Recruiting Undergraduate Students into Graduate Programs and Careers in Food Science  

ERIC Educational Resources Information Center

|A pressing problem facing regulatory agencies, academia, and the food industry is a shortage of qualified food science graduates, particularly those with advanced degrees (that is, M.S. or Ph.D.). In 2000, the Cornell Institute of Food Science established the annual Food Science Summer Scholars Program as an experiential summer research program…

Roberts, Angela J.; Robbins, Janette; McLandsborough, Lynne; Wiedmann, Martin

2010-01-01

480

The Summer Evening Anomaly and conjugate effects  

NASA Astrophysics Data System (ADS)

The Constellation Observing System for Meteorology, Ionosphere, and Climate (COSMIC) GPS occultation data have been analyzed in this study to provide a better understanding of the Weddell Sea Anomaly (WSA) and to place it in the wider context of a general phenomenon that occurs near dusk in summer which we are calling the Summer Evening Anomaly (SEA) to better capture its global nature. The terminator and the magnetically conjugate points for the terminator in the other hemisphere have been plotted on top of global maps of COSMIC NmF2 and hmF2 for two months either side of the December and June solstices for 2006 to 2008. These plots show that, in the late afternoon when the terminator and conjugate terminator are sufficiently separated in local time, there are distinct enhancements of NmF2 and increases in hmF2 as soon as the conjugate footprint of the field line on the winter terminator is seen at middle latitudes in the summer hemisphere. This effect is most pronounced where the WSA is formed, but it also occurs across the South Pacific Ocean in the southern summer, and across much of the North Atlantic Ocean, Siberia and Kamchatka during the northern summer. An hmF2 increase occurs between the two terminators even at locations where there is no increase in NmF2. A similar, but reversed, effect occurs in hmF2 near dawn. The NmF2 enhancement starts at the poleward boundary of the equatorial anomaly and occurs further from it as local times get later. This behavior is not consistent with neutral wind or downward precipitation explanations of the phenomenon, but is consistent with the behavior expected if a poleward (and hence upward as well) ion drift is occurring in the evening.

Burns, Alan; Wang, Wenbin; Solomon, Stanley; Lin, Charles C. H.; Jee, Gun-Hwa; Richmond, Arthur

481

National Institutes of Health  

Cancer.gov

DEPARTMENT OF HEALTH AND HUMAN SERVICES NATIONAL INSTITUTES OF HEALTH NATIONAL CANCER INSTITUTE 26th Meeting DIRECTOR’S CONSUMER LIAISON GROUP September 13-15, 2004 HOLIDAY INN SELECT BETHESDA 8120 Wisconsin Avenue Bethesda, Maryland 20814

482

Institutions: Rules or Equilibria?  

Microsoft Academic Search

\\u000a Recent scholarship has demonstrated the power of the rational choice framework for advancing our understanding of institutions\\u000a and institutional change. Stimulated by these developments, the conceptual frameworks employed by scholars studying institutions\\u000a have also been evolving, as old frameworks have been adapted and new frameworks have emerged to explore how institutions function,\\u000a how they change, and how they affect economic

Avner Greif; Christopher Kingston

483

The East Asian summer monsoon: an overview  

NASA Astrophysics Data System (ADS)

The present paper provides an overview of major problems of the East Asian summer monsoon. The summer monsoon system over East Asia (including the South China Sea (SCS)) cannot be just thought of as the eastward and northward extension of the Indian monsoon. Numerous studies have well documented that the huge Asian summer monsoon system can be divided into two subsystems: the Indian and the East Asian monsoon system which are to a greater extent independent of each other and, at the same time, interact with each other. In this context, the major findings made in recent two decades are summarized below: (1) The earliest onset of the Asian summer monsoon occurs in most of cases in the central and southern Indochina Peninsula. The onset is preceded by development of a BOB (Bay of Bengal) cyclone, the rapid acceleration of low-level westerlies and significant increase of convective activity in both areal extent and intensity in the tropical East Indian Ocean and the Bay of Bengal. (2) The seasonal march of the East Asian summer monsoon displays a distinct stepwise northward and northeastward advance, with two abrupt northward jumps and three stationary periods. The monsoon rain commences over the region from the Indochina Peninsula-the SCS-Philippines during the period from early May to mid-May, then it extends abruptly to the Yangtze River Basin, and western and southern Japan, and the southwestern Philippine Sea in early to mid-June and finally penetrates to North China, Korea and part of Japan, and the topical western West Pacific. (3) After the onset of the Asian summer monsoon, the moisture transport coming from Indochina Peninsula and the South China Sea plays a crucial “switch” role in moisture supply for precipitation in East Asia, thus leading to a dramatic change in climate regime in East Asia and even more remote areas through teleconnection. (4) The East Asian summer monsoon and related seasonal rain belts assumes significant variability at intraseasonal, interannual and interdecadal time scales. Their interaction, i.e., phase locking and in-phase or out-phase superimposing, can to a greater extent control the behaviors of the East Asian summer monsoon and produce unique rythem and singularities. (5) Two external forcing i.e., Pacific and Indian Ocean SSTs and the snow cover in the Eurasia and the Tibetan Plateau, are believed to be primary contributing factors to the activity of the East Asian summer monsoon. However, the internal variability of the atmospheric circulation is also very important. In particular, the blocking highs in mid-and high latitudes of Eurasian continents and the subtropical high over the western North Pacific play a more important role which is quite different from the condition for the South Asian monsoon. The later is of tropical monsoon nature while the former is of hybrid nature of tropical and subtropical monsoon with intense impact from mid-and high latitudes.

Yihui, Ding; Chan, Johnny C. L.

2005-06-01

484

Institutions and ICT Adoption  

Microsoft Academic Search

This paper evaluates the global diffusion process for three ICT technologies: cellular telephony, Internet and personal computers to test the hypothesis that the difference between countries in institutional characteristics significantly affects the time to adoption of these technologies. The analysis shows that the quality of economic and financial institutions and, to a smaller degree political institutions, significantly affects the time

Johan Kiessling

2006-01-01

485

Media as Social Institution  

Microsoft Academic Search

Mass media have emerged as a social institution, assuming many of the functions formerly served by traditional social institutions such as the church, school, government, and family. However, in Western countries operating on the private-ownership model (most notably the United States), media systems were never intended to serve as a social institution. Instead, the primary objective of a privately owned

Art Silverblatt

2004-01-01

486

Herzberg Institute of Astrophysics  

NASA Astrophysics Data System (ADS)

The Herzberg Institute of Astrophysics (HIA) is the Institute within the NATIONAL RESEARCH COUNCIL of Canada responsible for providing astronomical facilities, and developing related instrumentation and software for Canadian researchers. The Institute was established in 1975, and now operates 1.8 m and 1.2 m optical telescopes at the DOMINION ASTROPHYSICAL OBSERVATORY close to Victoria, BC, as we...

Murdin, P.

2000-11-01

487

Institutions, Innovation, and Incentives.  

ERIC Educational Resources Information Center

|It is important to achieve effective innovation in computer-assisted instruction (CAI). Meaningful innovation can be achieved only by changing the system--that is, by changing not only the technology, but also the institutions and persons involved. Two institutions are proposed: a National Institute of Education which would support creation of a…

Levien, Roger E.

488

Plasma Wakefield Acceleration at SLAC: Results of the E-167 Experiment  

NASA Astrophysics Data System (ADS)

Plasma wakefield accelerators are emerging as one of the most promising schemes for future accelerators. Beam-driven plasma wakefield acceleration experiments are carried out in the FFTB beamline at SLAC. The sub-picosecond ultra-relativistic electron bunches field- ionize the lithium vapor. With a plasma density matched to the bunch length, an acceleration of more than one GeV in 10cm of plasma has been observed. A plasma wake can trap electrons and ions out of the plasma, accelerating them to relativistic energies. In previous experiments, signals that could be explained by trapped particles have been noticed. Therefore, we have set up time-resolved devices after the plasma. The bunch length of the trapped particles could be extremely short, and the present setup includes diagnostics to detect coherent emission of radiation at optical wavelengths. Furthermore, the energy gain appears to oscillate as a function of the length of the plasma channel. A lithium oven with a length that can be varied up to 30cm has been set up. After such a distance, numerical models predict that an incoming tilt in the electron beam could be amplified and a transverse instability could develop, leading to the break-up of the beam. In addition, we investigate the possibility to use the high flux of betatron/synchrotron X-Rays emitted in the plasma to create electron-positron pairs. Finally, we are making first steps towards a scheme where one bunch drives the plasma wake and a following bunch samples the accelerating field. To achieve this, a bunch from the SLC accelerator is split horizontally by a notch collimator. Due to an inherent position-time dependence of the particles, a twin bunch is created. In the long run, this concept presents a way to achieve mono-energetic particle bunches.

Ischebeck, Rasmus

2005-10-01

489

Mediterranean summer climate and the monsoon regimes  

NASA Astrophysics Data System (ADS)

The Authors examine the general features of climate of the Mediterranean Region, i.e. its variability and trends in the last 40 years, and the teleconnections between Mediterranean climate and the global climate, using zonal and global indices. In particular they focus the attention on the analysis of the summer Mediterranean climate, and its variability and connection with the summer monsoon regimes. Several subregions can be distinguished in the Mediterranean for each season, and the occurrence of Mediterranean Oscillation is evident between West and East sub-basins. Precipitation and SLP fields in the Eastern basin are shown to be correlated with Mediterranean Oscillation. A total decrease of precipitation has been detected in last few years, although there are some very intense. During winter a fundamental role is played by NAO index, which, influencing the storm tracks coming from the Atlantic and passing over the Mediterranean and North Europe, it has a major role in the precipitation patterns over the Region. Moreover, temperature analysis over the last 40 years in the Mediterranean shows a distinct warming, in agreement with the pattern over North Emisphere and NAO index fluctuations. During summer the Hadley cell extend further northwards, influencing the Mediterranean climate, and there is evidence of a possible teleconnection with the Asian Monsoon, and the Sahel precipitation (and related Hadley cell): the SLP field in the Eastern Mediterranean is inversely correlated with those two precipitation indices, while it is positively correlated with the pressure in the Western Mediterranean. Leading mechanisms of interaction between Mediterranean summer rainfall and SLP patterns and precipitation indices associated with monsoon regimes are stressed out and investigated, as well as the influence of the position and strength of the Hadley cell, by means of both statistical and dynamical analytical arguments. A modeling study has been carried out in order to study the variations and the anomalies in the recent Mediterranean summer precipitation patterns, consisting of two main phases. In the first phase, a numerical regional atmospheric model has been used to downscale the NCEP/NCAR reanalyses, showing a good agreement between model simulations and observations, proving the capability of the modeling tool. During the second phase, following and extending recent experiences the numerical model has been used to identify the features and extent of the impacts of the location and strength of the West Africa summer monsoon - therefore the regional Hadley cell - to the Mediterranean climate, by selectively modifying the main forcing of that tropical circulation, i.e. the Gulf of Guinea sea surface temperatures.

Baldi, M.; Crisci, A.; Dalu, G. A.; Maracchi, G.; Meneguzzo, F.; Pasqui, M.

2003-04-01

490

Alpbach Summer School - a unique learning experience  

NASA Astrophysics Data System (ADS)

The Alpbach Summer School is a ten-day program that provides a unique opportunity for young european science and engineering students, both undergraduate and graduate, to learn how to approach the entire design process of a space mission. The theme of the 2010 Summer School was "New Space Missions to Understand Climate Change", a current, challenging, very broad and complex topic. The program was established more than 35 years ago and is organised in two interrelated parts: a series of lectures held by renowned experts in the field (in the case of this specific year, climate change and space engineering experts) that provides a technical and scientific background for the workshops that follow, the core of the Summer School. For the workshops the students are split into four international, interdisciplinary teams of about 15 students. In 2010 every team had to complete a number of tasks, four in total: (1) identify climate change research gaps and design a space mission that has not yet been flown or proposed, (2) define the science objectives and requirements of the mission, (3) design a spacecraft that meets the mission requirements, which includes spacecraft design and construction, payload definition, orbit calculations, but also the satellite launch, operation and mission costs and (4) write up a short mission proposal and present the results to an expert review panel. Achieving these tasks in only a few days in a multicultural, interdisciplinary team represents a major challenge for all participants and provides an excellent practical learning experience. Over the course of the program, students do not just learn facts about climate change and space engineering, but scientists also learn from engineers and engineers from scientists. The participants have to deepen their knowledge in an often unfamiliar field, develop organisational and team-work skills and work under pressure. Moreover, teams are supported by team and roving tutors and get the opportunity to meet and learn from international experts. This presentation will provide an overview of the Alpbach Summer School program from a student's perspective. The different stages of this unique and enriching experience will be covered. Special attention will be paid to the workshops, which, as mentioned above, are the core of the Alpbach Summer School. During these intense workshops, participants work towards the proposed goals resulting in the design proposal of a space mission. The Alpbach Summer School is organised by FFG and co-sponsored by ESA, ISSI and the national space authorities of ESA member and cooperating states.

Kern, K.; Aulinas, J.; Clifford, D.; Krejci, D.; Topham, R.

2011-12-01

491

Increased leaf photosynthesis caused by elevated stomatal conductance in a rice mutant deficient in SLAC1, a guard cell anion channel protein  

PubMed Central

In rice (Oryza sativa L.), leaf photosynthesis is known to be highly correlated with stomatal conductance; however, it remains unclear whether stomatal conductance dominantly limits the photosynthetic rate. SLAC1 is a stomatal anion channel protein controlling stomatal closure in response to environmental [CO2]. In order to examine stomatal limitations to photosynthesis, a SLAC1-deficient mutant of rice was isolated and characterized. A TILLING screen of N-methyl-N-nitrosourea-derived mutant lines was conducted for the rice SLAC1 orthologue gene Os04g0674700, and four mutant lines containing mutations within the open reading frame were obtained. A second screen using an infrared thermography camera revealed that one of the mutants, named slac1, had a constitutive low leaf temperature phenotype. Measurement of leaf gas exchange showed that slac1 plants grown in the greenhouse had significantly higher stomatal conductance (g s), rates of photosynthesis (A), and ratios of internal [CO2] to ambient [CO2] (C i/C a) compared with wild-type plants, whereas there was no significant difference in the response of photosynthesis to internal [CO2] (A/C i curves). These observations demonstrate that in well-watered conditions, stomatal conductance is a major determinant of photosynthetic rate in rice.

Kusumi, Kensuke

2012-01-01

492

Ventures in science status report, Summer 1992  

SciTech Connect

The Ventures in Science summer program is directed towards students who are from underrepresented minority groups in mathematics and science professions. The target group of 40 was drawn from eligible students who will be entering high school freshman in the fall of 1992. 450 students applied. The theme for the summer is Chicago as an Ecosystem. The students are instructed in integrated math and science (2 hours), English/ESL (1 1/2 hrs.), counseling (1 hr.) and, physical education (1 hr.) each day four days a week. Integrated math and science are team taught. Parents are invited to participate in two workshops that will be presented based on their input. Parents may also visit the program at any time and participate in any field trip.

Not Available

1992-11-01

493

2002 Fusion Summer Study Executive Summary  

NASA Astrophysics Data System (ADS)

The 2002 Fusion Summer Study was conducted July 8-19, 2002, in Snowmass, CO, and carried out a critical assessment of major next steps in the fusion energy sciences program in both magnetic fusion energy (MFE) and inertial fusion energy (IFE). The conclusions of this study were based on analysis led by over 60 conveners working with hundreds of members of the fusion energy sciences community extending over eight months. This effort culminated in two weeks of intense discussion by over 250 U.S. and 30 foreign fusion physicists and engineers present at the 2002 Fusion Summer Study. This is the Executive Summary of the study report. Details are posted at http://web.gat.com/snowmass

Bangerter, Roger; Navratil, Gerald; Sauthoff, Ned

2001-09-01

494

Thermal Controls on the Asian Summer Monsoon  

PubMed Central

The Asian summer monsoon affects more than sixty percent of the world's population; understanding its controlling factors is becoming increasingly important due to the expanding human influence on the environment and climate and the need to adapt to global climate change. Various mechanisms have been suggested; however, an overarching paradigm delineating the dominant factors for its generation and strength remains debated. Here we use observation data and numerical experiments to demonstrates that the Asian summer monsoon systems are controlled mainly by thermal forcing whereas large-scale orographically mechanical forcing is not essential: the South Asian monsoon south of 20°N by land–sea thermal contrast, its northern part by the thermal forcing of the Iranian Plateau, and the East Asian monsoon and the eastern part of the South Asian monsoon by the thermal forcing of the Tibetan Plateau.

Wu, Guoxiong; Liu, Yimin; He, Bian; Bao, Qing; Duan, Anmin; Jin, Fei-Fei

2012-01-01

495

78 FR 7750 - Summer Food Service Program; 2013 Reimbursement Rates  

Federal Register 2010, 2011, 2012, 2013

...and Nutrition Service Summer Food Service Program; 2013 Reimbursement Rates AGENCY: Food and Nutrition Service, USDA...meals served in the Summer Food Service Program for Children...Richard B. Russell National School Lunch Act. The 2013...

2013-02-04

496

Easing into Outdoor Workouts on Sultry Summer Days  

MedlinePLUS

... JavaScript. Easing into outdoor workouts on sultry summer days (*this news item will not be available after ... outdoor exercisers who dread the long, hot summer days of steamy runs and breathless aerobics during a ...

497

The NASA/Olin Summer Internship Program  

NASA Astrophysics Data System (ADS)

In each of the past five summers, underclassmen at the Franklin W. Olin College of Engineering have worked in small teams under the mentorship of astrophysicists at NASA's Goddard Space Flight Center. The experience of tackling authentic projects with strict schedule constraints has provided them with educational experiences that are quite different from what might be obtained in a classroom setting. Results from the perspectives of the Goddard mentors, the faculty advisors and the students will be presented.

Holt, Stephen

2008-04-01

498

NASA Planetary Science Summer School: Longitudinal Study  

Microsoft Academic Search

NASA's Planetary Science Summer School is a program designed to prepare the next generation of scientists and engineers to participate in future missions of solar system exploration. The opportunity is advertised to science and engineering post-doctoral and graduate students with a strong interest in careers in planetary exploration. Preference is given to U.S. citizens. The ``school'' consists of a one-week

Jennie M. Giron; A. Sohus

2006-01-01

499

Observe Water in Winter and Summer  

NSDL National Science Digital Library

This short video segment depicts water in different seasons at the same location. On Earth, water can regularly be found in three different phases â liquid, solid, and gas â each of which has noticeably different properties. For example, a boat can glide through liquid water in summer, but it cannot do so when the water turns to solid ice in winter. Atmospheric conditions, specifically seasonal temperatures, can influence the phase in which water exists at a given time.

Foundation, Wgbh E.

2009-07-22

500

APS Forum on Education Newsletter Summer 2008  

NSDL National Science Digital Library

The summer 2008 edition of the Forum on Education newsletter includes links to a number of education related talks presented at the 2008 APS March Meeting and 2008 APS April Meeting. In the teacher preparation section, Laurie E. McNeil discusses starting a teacher preparation program at the University of North Carolina - Chapel Hill and Laird Kramer details the use of learning communities at Florida International University. Monica Plisch examines the use of teacher preparation to fulfill the NSF's Broader Impact requirement.

2008-09-12