WorldWideScience

Sample records for surface physics laboratory

  1. Physical Sciences Laboratory (PSL)

    Data.gov (United States)

    Federal Laboratory Consortium — PNNL's Physical Sciences Laboratory (PSL) houses 22 research laboratories for conducting a wide-range of research including catalyst formulation, chemical analysis,...

  2. Physics laboratory 2

    International Nuclear Information System (INIS)

    1980-01-01

    The report covers the research activities of the Physics laboratory of H.C. Oersted Institute, University of Copenhagen in the period January 1, 1976 - January 1, 1979. It gives also an idea about the teaching carried out by yhe laboratory. The research - broadly speaking - deals mainly with the interaction of particles (ions, electrons and neutrons) and electromagnetic radiation (X-rays) with matter. Use is made in studies of: atomic physics, radiation effects, surface physics, the electronic and crystallographic structure of matter and some biological problems. The research is carried out partly in the laboratory itself and partly at and in collaboration with other institutes in this country (H.C. Oersted Institute, Chemical Laboratories, Denmark's Technical University, Aarhus University, Institute of Physics and Risoe National Laboratory) and abroad (Federal Republic of Germany, France, India, Sweden, U.K., U.S.A. and U.S.S.R.). All these institutes are listed in the abstract titles. Bibliography comprehends 94 publications. A substantial part of the research is supported by the Danish Natural Sciences Research Council. (author)

  3. Laboratory of Chemical Physics

    Data.gov (United States)

    Federal Laboratory Consortium — Current research in the Laboratory of Chemical Physics is primarily concerned with experimental, theoretical, and computational problems in the structure, dynamics,...

  4. Physical Research Laboratory

    Indian Academy of Sciences (India)

    The Physical Research Laboratory (PRL) is a leading research institution of the country engaged in basic research in several areas of experimental and theoretical physics, space and earth sciences. The Laboratory conducts summer training programme for students every year for about 2 months (during May 15 - July 15) ...

  5. Estimating the Analytical and Surface Enhancement Factors in Surface-Enhanced Raman Scattering (SERS): A Novel Physical Chemistry and Nanotechnology Laboratory Experiment

    Science.gov (United States)

    Pavel, Ioana E.; Alnajjar, Khadijeh S.; Monahan, Jennifer L.; Stahler, Adam; Hunter, Nora E.; Weaver, Kent M.; Baker, Joshua D.; Meyerhoefer, Allie J.; Dolson, David A.

    2012-01-01

    A novel laboratory experiment was successfully implemented for undergraduate and graduate students in physical chemistry and nanotechnology. The main goal of the experiment was to rigorously determine the surface-enhanced Raman scattering (SERS)-based sensing capabilities of colloidal silver nanoparticles (AgNPs). These were quantified by…

  6. Laboratory simulations of planetary surfaces: Understanding regolith physical properties from remote photopolarimetric observations

    Science.gov (United States)

    Nelson, Robert M.; Boryta, Mark D.; Hapke, Bruce W.; Manatt, Kenneth S.; Shkuratov, Yuriy; Psarev, V.; Vandervoort, Kurt; Kroner, Desire; Nebedum, Adaze; Vides, Christina L.; Quiñones, John

    2018-03-01

    We present reflectance and polarization phase curve measurements of highly reflective planetary regolith analogues having physical characteristics expected on atmosphereless solar system bodies (ASSBs) such as a eucritic asteroids or icy satellites. We used a goniometric photopolarimeter (GPP) of novel design to study thirteen well-sorted particle size fractions of aluminum oxide (Al2O3). The sample suite included particle sizes larger than, approximately equal to, and smaller than the wavelength of the incident monochromatic radiation (λ = 635 nm). The observed phase angle, α, was 0.056 o ∼95%). The incident radiation has a very high probability of being multiply scattered before being backscattered toward the incident direction or ultimately absorbed. The five smallest particle sizes exhibited extremely high void space (> ∼95%). The reflectance phase curves for all particle size fractions show a pronounced non-linear reflectance increase with decreasing phase angle at α∼ ∼1 we detect no polarization. This polarization behavior is distinct from that observed in low albedo solar system objects such as the Moon and asteroids and for absorbing materials in the laboratory. We suggest this behavior arises because photons that are backscattered have a high probability of having interacted with two or more particles, thus giving rise to the CB process. These results may explain the unusual negative polarization behavior observed near small phase angles reported for several decades on highly reflective ASSBs such as the asteroids 44 Nysa, 64 Angelina and the Galilean satellites Io, Europa and Ganymede. Our results suggest these ASSB regoliths scatter electromagnetic radiation as if they were extremely fine grained with void space > ∼95%, and grain sizes of the order field of terrestrial geo-engineering, particularly to suggestions that earth's radiation balance can be modified by injecting Al2O3 particulates into the stratosphere thereby offsetting the effect

  7. Nuclear physics laboratory

    International Nuclear Information System (INIS)

    Deruytter, A.J.

    1979-01-01

    The report summarizes the main activities of the Linear Electron Accelerator Section of the Physics Laboratory of the State University of Ghent. The research fields are relative to: 1. Nuclear fission. 2. Photonuclear reactions. 3. Nuclear spectroscopy and positron annihilation. 4. Dosimetry. 5. Theoretical studies. (MDC)

  8. Nuclear physics laboratory

    International Nuclear Information System (INIS)

    Deruytter, A.J.

    1978-01-01

    The report summarizes the main activities of the Linear Electron Accelerator Section of the Physics Laboratory of the State University of Ghent. The research fields are relative to: 1. Nuclear fission. 2. Photonuclear reactions. 3. Nuclear spectroscopy and positron annihilation. 4. Dosimetry. 5. Theoretical studies. (MDC)

  9. Undergraduate Laboratory for Surface Science

    Science.gov (United States)

    Okumura, Mitchio; Beauchamp, Jesse L.; Dickert, Jeffrey M.; Essy, Blair R.; Claypool, Christopher L.

    1996-02-01

    Surface science has developed into a multidisciplinary field of research with applications ranging from heterogeneous catalysis to semiconductor etching (1). Aspects of surface chemistry are now included in physical chemistry textbooks (2) and undergraduate curricula (3), but the perceived cost and complexity of equipment has deterred the introduction of surface science methods in undergraduate laboratories (4). Efforts to expose chemistry undergraduates to state-of-the-art surface instrumentation have just begun (5). To provide our undergraduates with hands-on experience in using standard techniques for characterizing surface morphology, adsorbates, kinetics, and reaction mechanisms, we have developed a set of surface science experiments for our physical chemistry laboratory sequence. The centerpiece of the laboratory is an ultrahigh vacuum (UHV) chamber for studies of single crystal surfaces. This instrument, shown in the figure, has surface analysis capabilities including low energy electron diffraction (LEED), Auger spectroscopy, and temperature-programmed desorption (TPD). The laboratory exercises involve experiments on the well-studied Pt(111) surface. Students prepare a previously mounted single crystal sample by sputtering it with an argon ion gun and heating it under O2. Electron diffraction patterns from the cleaned surface are then obtained with a reverse view LEED apparatus (Princeton Instruments). Images are captured by a charge-coupled device (CCD) camera interfaced to a personal computer for easy downloading and subsequent analysis. Although the LEED images from a Pt(111) surface can be readily interpreted using simple diffraction arguments, this lab provides an excellent context for introducing Miller indices and reciprocal lattices (6). The surface chemical composition can be investigated by Auger spectroscopy, using the LEED apparatus as a simple energy analyzer. The temperature programmed desorption experiment, which is nearly complete, will be

  10. Princeton Plasma Physics Laboratory

    International Nuclear Information System (INIS)

    1990-01-01

    This report discusses the following topics: principal parameters achieved in experimental devices fiscal year 1990; tokamak fusion test reactor; compact ignition tokamak; Princeton beta experiment- modification; current drive experiment-upgrade; international collaboration; x-ray laser studies; spacecraft glow experiment; plasma processing: deposition and etching of thin films; theoretical studies; tokamak modeling; international thermonuclear experimental reactor; engineering department; project planning and safety office; quality assurance and reliability; technology transfer; administrative operations; PPPL patent invention disclosures for fiscal year 1990; graduate education; plasma physics; graduate education: plasma science and technology; science education program; and Princeton Plasma Physics Laboratory reports fiscal year 1990

  11. Princeton Plasma Physics Laboratory

    Energy Technology Data Exchange (ETDEWEB)

    1990-01-01

    This report discusses the following topics: principal parameters achieved in experimental devices fiscal year 1990; tokamak fusion test reactor; compact ignition tokamak; Princeton beta experiment- modification; current drive experiment-upgrade; international collaboration; x-ray laser studies; spacecraft glow experiment; plasma processing: deposition and etching of thin films; theoretical studies; tokamak modeling; international thermonuclear experimental reactor; engineering department; project planning and safety office; quality assurance and reliability; technology transfer; administrative operations; PPPL patent invention disclosures for fiscal year 1990; graduate education; plasma physics; graduate education: plasma science and technology; science education program; and Princeton Plasma Physics Laboratory reports fiscal year 1990.

  12. Princeton Plasma Physics Laboratory:

    Energy Technology Data Exchange (ETDEWEB)

    Phillips, C.A. (ed.)

    1986-01-01

    This paper discusses progress on experiments at the Princeton Plasma Physics Laboratory. The projects and areas discussed are: Principal Parameters Achieved in Experimental Devices, Tokamak Fusion Test Reactor, Princeton Large Torus, Princeton Beta Experiment, S-1 Spheromak, Current-Drive Experiment, X-ray Laser Studies, Theoretical Division, Tokamak Modeling, Spacecraft Glow Experiment, Compact Ignition Tokamak, Engineering Department, Project Planning and Safety Office, Quality Assurance and Reliability, and Administrative Operations.

  13. Princeton Plasma Physics Laboratory:

    International Nuclear Information System (INIS)

    Phillips, C.A.

    1986-01-01

    This paper discusses progress on experiments at the Princeton Plasma Physics Laboratory. The projects and areas discussed are: Principal Parameters Achieved in Experimental Devices, Tokamak Fusion Test Reactor, Princeton Large Torus, Princeton Beta Experiment, S-1 Spheromak, Current-Drive Experiment, X-ray Laser Studies, Theoretical Division, Tokamak Modeling, Spacecraft Glow Experiment, Compact Ignition Tokamak, Engineering Department, Project Planning and Safety Office, Quality Assurance and Reliability, and Administrative Operations

  14. Laboratory for Extraterrestrial Physics

    Science.gov (United States)

    Vondrak, Richard R. (Technical Monitor)

    2001-01-01

    The NASA Goddard Space Flight Center (GSFC) Laboratory for Extraterrestrial Physics (LEP) performs experimental and theoretical research on the heliosphere, the interstellar medium, and the magnetospheres and upper atmospheres of the planets, including Earth. LEP space scientists investigate the structure and dynamics of the magnetospheres of the planets including Earth. Their research programs encompass the magnetic fields intrinsic to many planetary bodies as well as their charged-particle environments and plasma-wave emissions. The LEP also conducts research into the nature of planetary ionospheres and their coupling to both the upper atmospheres and their magnetospheres. Finally, the LEP carries out a broad-based research program in heliospheric physics covering the origins of the solar wind, its propagation outward through the solar system all the way to its termination where it encounters the local interstellar medium. Special emphasis is placed on the study of solar coronal mass ejections (CME's), shock waves, and the structure and properties of the fast and slow solar wind. LEP planetary scientists study the chemistry and physics of planetary stratospheres and tropospheres and of solar system bodies including meteorites, asteroids, comets, and planets. The LEP conducts a focused program in astronomy, particularly in the infrared and in short as well as very long radio wavelengths. We also perform an extensive program of laboratory research, including spectroscopy and physical chemistry related to astronomical objects. The Laboratory proposes, develops, fabricates, and integrates experiments on Earth-orbiting, planetary, and heliospheric spacecraft to measure the characteristics of planetary atmospheres and magnetic fields, and electromagnetic fields and plasmas in space. We design and develop spectrometric instrumentation for continuum and spectral line observations in the x-ray, gamma-ray, infrared, and radio regimes; these are flown on spacecraft to study

  15. Free Surface Hydrodynamics Laboratory

    Data.gov (United States)

    Federal Laboratory Consortium — FUNCTION: Investigates processes and interactions at the air-sea interface, and compares measurements to numerical simulations and field data. Typical phenomena of...

  16. Physical Research Laboratory

    Indian Academy of Sciences (India)

    INF. & ANN. Non-linear Dynamics, Computational Physics and Computer Science. Classical and quantum chaos and time series analysis of complex systems. Numerical studies in general relativity. Research in computer science with focus on image processing and pattern recognition. Laser Physics and Quantum Optics.

  17. Geoacoustic Physical Model Fabrication Laboratory

    Data.gov (United States)

    Federal Laboratory Consortium — FUNCTION: Fabricates three-dimensional rough surfaces (e.g., fractals, ripples) out of materials such as PVC or wax to simulate the roughness properties associated...

  18. Physics Research at the Naval Research Laboratory

    Science.gov (United States)

    Coffey, Timothy

    2001-03-01

    The United States Naval Research Laboratory conducts a broad program of research into the physical properties of matter. Studies range from low temperature physics, such as that associated with superconducting systems to high temperature systems such as laser produced or astrophysical plasmas. Substantial studies are underway on surface science and nanoscience. Studies are underway on the electronic and optical properties of materials. Studies of the physical properties of the ocean and the earth’s atmosphere are of considerable importance. Studies of the earth’s sun particularly as it effects the earth’s ionosphere and magnetosphere are underway. The entire program involves a balance of laboratory experiments, field experiments and supporting theoretical and computational studies. This talk will address NRL’s funding of physics, its employment of physicists and will illustrate the nature of NRL’s physics program with several examples of recent accomplishments.

  19. Surface modes in physics

    CERN Document Server

    Sernelius, Bo E

    2011-01-01

    Electromagnetic surface modes are present at all surfaces and interfaces between material of different dielectric properties. These modes have very important effects on numerous physical quantities: adhesion, capillary force, step formation and crystal growth, the Casimir effect etc. They cause surface tension and wetting and they give rise to forces which are important e.g. for the stability of colloids.This book is a useful and elegant approach to the topic, showing how the concept of electromagnetic modes can be developed as a unifying theme for a range of condensed matter physics. The

  20. Achieving Very Low Levels of Detection: An Improved Surface-Enhanced Raman Scattering Experiment for the Physical Chemistry Teaching Laboratory

    Science.gov (United States)

    McMillan, Brian G.

    2016-01-01

    This experiment was designed and successfully introduced to complement the nanochemistry taught to undergraduate students in a useful and interesting way. Colloidal Ag nanoparticles were synthesized by a simple, room-temperature method, and the resulting suspension was then used to study the surface-enhanced Raman scattering (SERS) of methylene…

  1. Physics Laboratory technical activities, 1991. Final report

    International Nuclear Information System (INIS)

    Gebbie, K.B.

    1992-02-01

    The report summarizes research projects, measurement method development, calibration and testing, and data evaluation activities that were carried out during calendar year 1991 in the NIST Physics Laboratory. These activities fall in the areas of electron and optical physics, atomic physics, molecular physics, radiometric physics, quantum metrology, ionizing radiation, time and frequency, quantum physics, and fundamental constants

  2. Nuclear Physics Laboratory. Annual report no.22

    International Nuclear Information System (INIS)

    1987-11-01

    The annual report of the Nuclear Physics Laboratory covers the following subjects: 1) the accelerators; 2) work in experimental nuclear physics; 3) research in particle physics: experiments at TRIUMF and CERN; 4) work in applied nuclear physics; and 5) work in theoretical physics

  3. Nuclear Physics Laboratory. Annual report no.21

    International Nuclear Information System (INIS)

    1986-11-01

    The annual report of the Nuclear Physics Laboratory covers the following subjects: 1) the accelerators; 2) work in experimental nuclear physics; 3) research in particle physics: experiments at TRIUMF and CERN; 4) work in applied nuclear physics; and 5) work in theoretical physics

  4. [The mission of Princeton Plasma Physics Laboratory

    International Nuclear Information System (INIS)

    1993-01-01

    This report discusses the following about Princeton Plasma Physics Laboratory: its mission; requirements and guidance documents for the QA program; architecture; assessment organization; and specific management issues

  5. Concepts in surface physics

    CERN Document Server

    Desjonquères, M -C

    1993-01-01

    This textbook is intended as an introduction to surface science for graduate students. It began as a course of lectures that we gave at the University of Paris (Orsay). Its main objectives are twofold: to provide the reader with a compre­ hensive presentation of the basic principles and concepts of surface physics and to show the usefulness of these concepts in the real world by referring to experiments. It starts at a rather elementary level since it only requires a knowledge of solid state physics, quantum mechanics, thermodynamics and statistical physics which does not exceed the background usually taught to students early in their university courses. However, since it finally reaches an advanced level, we have tried to render it as self-contained as possible so that it remains accessible even to an unexperienced reader. Furthermore, the emphasis has been put on a pedagogical level rather than on a technical level. In this spirit, whenever possible, models which are simplified, but which contain the featu...

  6. Student Teachers' Attitudes about Basic Physics Laboratory

    Science.gov (United States)

    Yesilyurt, Mustafa

    2004-01-01

    In this study an attitude questionnaire was developed and applied to identify student teachers' interests and attitudes for basic physics laboratory. In physics laboratory practices run by a higher education institution a new attitude questionnaire was developed and applied twice in two terms by researchers to increase student teachers' success…

  7. Students' perceptions of a physics laboratory immersion

    OpenAIRE

    Langie, Greet; Verelst, Fien; Van den Bossche, Johan; De Cock, Mieke

    2011-01-01

    In order to facilitate flexible learning in engineering and science laboratory education, we have developed a specific laboratory course design: laboratory immersion. This concept is a combination of three other lab styles: hands-on, virtual and remote labs. The physics laboratory immersion is implemented and evaluated by students and teaching staff. This new method has some strengths such as increased flexibility and student activity, but it also needs some improvements such as teamwork and...

  8. Particle physics laboratory turns 50

    CERN Multimedia

    Berdik, Chris

    2004-01-01

    For a half-century, physicists from all over the world have sought out the most fundamental structures of the universe from deep beneath the mountains of Switzerland. On Saturday, the laboratory in which they did their work, CERN, capped off a year of celebrations for its 50th annviersary (½ page)

  9. Modernisation of the intermediate physics laboratory

    Science.gov (United States)

    Kontro, Inkeri; Heino, Olga; Hendolin, Ilkka; Galambosi, Szabolcs

    2018-03-01

    The intermediate laboratory courses at the Department of Physics, University of Helsinki, were reformed using desired learning outcomes as the basis for design. The reformed laboratory courses consist of weekly workshops and small-group laboratory sessions. Many of the laboratory exercises are open-ended and have several possible ways of execution. They were designed around affordable devices, to allow for the purchase of multiple sets of laboratory equipment. This allowed students to work on the same problems simultaneously. Thus, it was possible to set learning goals which build on each other. Workshop sessions supported the course by letting the students solve problems related to conceptual and technical aspects of each laboratory exercise. The laboratory exercises progressed biweekly to allow for iterative problem solving. Students reached the learning goals well and the reform improved student experiences. Neither positive or negative changes in expert-like attitudes towards experimental physics (measured by E-CLASS questionnaire) were observed.

  10. Nuclear Physics Laboratory annual report

    International Nuclear Information System (INIS)

    Trainor, T.A.; Weitkamp, W.G.

    1985-04-01

    Progress is reported in these areas: nuclear physics relevant to astrophysics and cosmology; nuclear structure of 14 N; the Cabibbo angle in Fermi matrix elements of high j states; giant resonances; heavy ion reactions; 0 + - 0 - isoscalar parity mixing in 14 N; parity mixing in hydrogen and deuterium; medium energy physics; and accelerator mass spectrometry. Accelerators and ion sources, nuclear instrumentation, and computer systems at the university are discussed, including the booster linac project

  11. Atomic physics in the Tandar Laboratory

    International Nuclear Information System (INIS)

    Nemirovsky, I.B.

    1987-01-01

    The research activities carried out in the Tandar Laboratory of Physics Department of Argentine National Atomic Energy Comission are presented. The processes of heavy ion collisions with solids as thin lamellae investigated in the Laboratory are described. (M.C.K.) [pt

  12. Physics of Surfaces and Interfaces

    CERN Document Server

    Ibach, Harald

    2006-01-01

    This graduate-level textbook covers the major developments in surface sciences of recent decades, from experimental tricks and basic techniques to the latest experimental methods and theoretical understanding. It is unique in its attempt to treat the physics of surfaces, thin films and interfaces, surface chemistry, thermodynamics, statistical physics and the physics of the solid/electrolyte interface in an integral manner, rather than in separate compartments. The Physics of Surfaces and Interfaces is designed as a handbook for the researcher as well as a study-text for graduate students in physics or chemistry with special interest in the surface sciences, material science, or the nanosciences. The experienced researcher, professional or academic teacher will appreciate the opportunity to share many insights and ideas that have grown out of the author's long experience. Readers will likewise appreciate the wide range of topics treated, each supported by extensive references. Graduate students will benefit f...

  13. Overview. Health Physics Laboratory. Section 10

    Energy Technology Data Exchange (ETDEWEB)

    Waligorski, M.P.R. [Institute of Nuclear Physics, Cracow (Poland)

    1995-12-31

    The activities of the Health Physics Laboratory at the Niewodniczanski Institute of Nuclear Physics are presented and namely: research in the area of radiation physics and radiation protection of the employees of the Institute of Nuclear Physics, theoretical research concerns radiation detectors, radiation protection and studies of concepts of radiation protection and experimental research concerns solid state dosimetry. In this report, apart of the detail descriptions of mentioned activities, the information about personnel employed in the Department, papers and reports published in 1994, contribution to conferences and grants are also given.

  14. Surface physics : experimental

    International Nuclear Information System (INIS)

    Padalia, B.D.

    1978-01-01

    In this report, discussion is confined to some important ultra high vacuum surface techniques such as ultra-violet photoelectron spectroscopy (UPS), X-ray photoelectron spectroscopy (XPS), Auger electron spectroscopy (AES) and the low energy electron diffraction (LEED). An attempt is made to cover the basic principles and the experimental details of XPS and AES. Selected examples illustrating the potentialities of the above techniques to solve the important basic as well as applied problems relating to surfaces are presented. Salient features of the available commercial machines in which UPS, AES and LEED are combined to facilitate surface examination sequentially or simultaneously under identical experimental conditions are indicated. (auth.)

  15. "Strong interaction" for particle physics laboratories

    CERN Multimedia

    2003-01-01

    A new Web site pooling the communications resources of particle physics centres all over the world has just been launched. The official launching of the new particle physics website Interactions.org during the Lepton-Proton 2003 Conference at the American laboratory Fermilab was accompanied by music and a flurry of balloons. On the initiative of Fermilab, the site was created by a collaboration of communication teams from over fifteen of the world's particle physics laboratories, including KEK, SLAC, INFN, JINR and, of course, CERN, who pooled their efforts to develop the new tool. The spectacular launching of the new particle physics website Interactions.org at Fermilab on 12 August 2003. A real gateway to particle physics, the site not only contains all the latest news from the laboratories but also offers images, graphics and a video/animation link. In addition, it provides information about scientific policies, links to the universities, a very useful detailed glossary of particle physics and astrophysic...

  16. About the laboratories of general physics

    International Nuclear Information System (INIS)

    Alonso Medina, A.

    1996-01-01

    In this article it is analysed the role of the laboratory of general physics in the teaching of the discipline and establish the necessity to configurater it as an independent scope of the first cycle in order to get its specific objectives of teaching. (Author) 46 refs

  17. Underwater laboratory: Teaching physics through diving practice

    International Nuclear Information System (INIS)

    Favale, F.

    2013-01-01

    Diving education and diving science and technology may be a useful tool in teaching physics in non–physics-oriented High School courses. In this paper we present an activity which combines some simple theoretical aspects of fluid statics, fluid dynamics and gas behavior under pressure with diving experience, where the swimming pool and the sea are used as a laboratory. This topic had previously been approached in a pure experimental way in school laboratory, but some particular experiments became much more attractive and meaningful to the students when they could use their bodies to perform them directly in water. The activity was carried out with groups of students from Italian High School classes in different situations.

  18. UNIX at high energy physics Laboratories

    International Nuclear Information System (INIS)

    Silverman, Alan

    1994-01-01

    With more and more high energy physics Laboratories ''downsizing'' from large central proprietary mainframe computers towards distributed networks, usually involving UNIX operating systems, the need was expressed at the 1991 Computers in HEP (CHEP) Conference to create a group to consider the implications of this trend and perhaps work towards some common solutions to ease the transition for HEP users worldwide

  19. Laboratory space physics: Investigating the physics of space plasmas in the laboratory

    Science.gov (United States)

    Howes, Gregory G.

    2018-05-01

    Laboratory experiments provide a valuable complement to explore the fundamental physics of space plasmas without the limitations inherent to spacecraft measurements. Specifically, experiments overcome the restriction that spacecraft measurements are made at only one (or a few) points in space, enable greater control of the plasma conditions and applied perturbations, can be reproducible, and are orders of magnitude less expensive than launching spacecraft. Here, I highlight key open questions about the physics of space plasmas and identify the aspects of these problems that can potentially be tackled in laboratory experiments. Several past successes in laboratory space physics provide concrete examples of how complementary experiments can contribute to our understanding of physical processes at play in the solar corona, solar wind, planetary magnetospheres, and the outer boundary of the heliosphere. I present developments on the horizon of laboratory space physics, identifying velocity space as a key new frontier, highlighting new and enhanced experimental facilities, and showcasing anticipated developments to produce improved diagnostics and innovative analysis methods. A strategy for future laboratory space physics investigations will be outlined, with explicit connections to specific fundamental plasma phenomena of interest.

  20. Simulation of General Physics laboratory exercise

    International Nuclear Information System (INIS)

    Aceituno, P; Hernández-Cabrera, A; Hernández-Aceituno, J

    2015-01-01

    Laboratory exercises are an important part of general Physics teaching, both during the last years of high school and the first year of college education. Due to the need to acquire enough laboratory equipment for all the students, and the widespread access to computers rooms in teaching, we propose the development of computer simulated laboratory exercises. A representative exercise in general Physics is the calculation of the gravity acceleration value, through the free fall motion of a metal ball. Using a model of the real exercise, we have developed an interactive system which allows students to alter the starting height of the ball to obtain different fall times. The simulation was programmed in ActionScript 3, so that it can be freely executed in any operative system; to ensure the accuracy of the calculations, all the input parameters of the simulations were modelled using digital measurement units, and to allow a statistical management of the resulting data, measurement errors are simulated through limited randomization

  1. Undergraduate physics laboratory: Electrophoresis in chromatography paper

    Science.gov (United States)

    Hyde, Alexander; Batishchev, Oleg

    2015-12-01

    An experiment studying the physical principles of electrophoresis in liquids was developed for an undergraduate laboratory. We have improved upon the standard agarose gel electrophoresis experimental regime with a straightforward and cost-effective procedure, in which drops of widely available black food coloring were separated by electric field into their dye components on strips of chromatography paper soaked in a baking soda/water solution. Terminal velocities of seven student-safe dyes were measured as a function of the electric potential applied along the strips. The molecular mobility was introduced and calculated by analyzing data for a single dye. Sources of systematic and random errors were investigated.

  2. Physics Laboratory II - Annual Report for 1977

    International Nuclear Information System (INIS)

    Steenstrup, S.

    1977-01-01

    The research work carried out is generally concerned with the effect of electromagnetic and particle radiation - that is, electron, neutron, ion and molecular - on gases and solids. Excitation through atomic collisions is one subject studied both experimentally and theoretically; collision products are correlated with the materials' electron structure. Surface effects in solids under bombardment are also looked at. In particular, sputtering and radiation damage are of interest, and the relationship between sputtering and surface structure is being examined by experiment and by theoretical analysis. Experiments on ion bombardment of metals are performed as part of an international programme. Work on crystal structure which is under way uses electron, neutron and X-radiation for diffraction measurements. Some effort has been concentrated on phase transition in Cerium. There are in the laboratory various specialist equipments. An ion accelerator is under construction, and there are also a scanning electron microscope for the surface effect investigations, and a three axis X-ray spectrometer. Theoretical methods of analysis are being developed e.g. the frequency analysis of time series by the maximum entropy method. Biophysics is also of interest; for instance some work in nerve biopsy and associated conduction has been carried out. The list of references represents well the field of investigation covered by the laboratory. (G.P.)

  3. Eagleworks Laboratories: Advanced Propulsion Physics Research

    Science.gov (United States)

    White, Harold; March, Paul; Williams, Nehemiah; ONeill, William

    2011-01-01

    NASA/JSC is implementing an advanced propulsion physics laboratory, informally known as "Eagleworks", to pursue propulsion technologies necessary to enable human exploration of the solar system over the next 50 years, and enabling interstellar spaceflight by the end of the century. This work directly supports the "Breakthrough Propulsion" objectives detailed in the NASA OCT TA02 In-space Propulsion Roadmap, and aligns with the #10 Top Technical Challenge identified in the report. Since the work being pursued by this laboratory is applied scientific research in the areas of the quantum vacuum, gravitation, nature of space-time, and other fundamental physical phenomenon, high fidelity testing facilities are needed. The lab will first implement a low-thrust torsion pendulum (research has produced data suggesting very high specific impulse coupled with high specific force. If the physics and engineering models can be explored and understood in the lab to allow scaling to power levels pertinent for human spaceflight, 400kW SEP human missions to Mars may become a possibility, and at power levels of 2MW, 1-year transit to Neptune may also be possible. Additionally, the lab is implementing a warp field interferometer that will be able to measure spacetime disturbances down to 150nm. Recent work published by White [1] [2] [3] suggests that it may be possible to engineer spacetime creating conditions similar to what drives the expansion of the cosmos. Although the expected magnitude of the effect would be tiny, it may be a "Chicago pile" moment for this area of physics.

  4. Virtual Laboratories in Physics with Autogenerated Parameters

    Science.gov (United States)

    Maksimov, M. A.; Monakhov, V. V.; Kozhedub, A. V.

    2015-09-01

    The paper is devoted to a virtual laboratory system, which in particular can be used to test knowledge through research. The participant can prefer which tools to operate and what actions should be taken. For the most of the tasks, there are copious ways to obtain the correct solution. One of the most important features of the system that distinguish this one among other simulation packages and educational systems is the pseudo-random physical parameter generation technique. The technique supports constraints and relationships between variables. As a result, it provides correctness and equal complexity of the generated task. The system can be very complex and is highly customizable by internal script system executed on server-side. The system is used as a part of distolymp Learning Management System with about 40 thousand participants per year.

  5. Nuclear Physics Laboratory 1976 annual report. [Nuclear Physics Laboratory, Univ. of Washington

    Energy Technology Data Exchange (ETDEWEB)

    1976-06-01

    Laboratory activities for the period spring, 1975 to spring, 1976 are described. The emphasis of the work can be discerned from the chapter headings: accelerator development; ion source development; instrumentation, detectors, research techniques; computer and computing; atomic physics; nuclear astrophysics; fundamental symmetries in nuclei; nuclear structure; radiative capture measurements and calculations; scattering and reactions; reactions with polarized protons and deuterons; heavy-ion elastic and inelastic scattering; heavy-ion deeply inelastic and fusion reactions; heavy ion transfer and intermediate structure reactions; medium-energy physics; and energy studies. Research by users and visitors is also described; and laboratory personnel, degrees granted, and publications are listed. Those summaries having significant amounts of information are indexed individually. (RWR)

  6. Impregnation/Agglomeration Laboratory Tests of Heavy Fuel from Prestige to Improve Its Manageability and Removal from Seawater Surface. (Physical Behaviour of Fuel Agglomates)

    International Nuclear Information System (INIS)

    Garcia Frutos, F. J.; Rodriguez, V.; Otero, J.

    2002-01-01

    The handling and removal problems showed by heavy fuel floating in seawater could be improved or solved by using materials that agglomerate it. These materials must fulfill the following conditions: be inert materials in marine environment, the agglomerated fuel/material should float and its application and removal should be done using simple technologies. Based on these requirements, clay minerals, pine chips, mineral coal and charcoal were selected. The preliminary/results on impregnation/agglomeration with the materials mentioned above of heavy fuel from Prestige at lab scale are presented in this paper. The results have shown that only hydrophobic materials, such as mineral coal and charcoal, are able to agglomerate with fuel, which is also a hydrophobic substance. Whereas the agglomerates fuel/mineral coal sink, the agglomerates fuel/charcoal keep floating on water surface. It can be concluded that the addition of charcoal on dispersed fuel in seawater could improve its handling and removal. In this sense, pilot scale and eventually controlled in situ tests to study the feasibility of the proposed solution should be performed. (Author) 2 refs

  7. Current Reactor Physics Benchmark Activities at the Idaho National Laboratory

    Energy Technology Data Exchange (ETDEWEB)

    John D. Bess; Margaret A. Marshall; Mackenzie L. Gorham; Joseph Christensen; James C. Turnbull; Kim Clark

    2011-11-01

    The International Reactor Physics Experiment Evaluation Project (IRPhEP) [1] and the International Criticality Safety Benchmark Evaluation Project (ICSBEP) [2] were established to preserve integral reactor physics and criticality experiment data for present and future research. These valuable assets provide the basis for recording, developing, and validating our integral nuclear data, and experimental and computational methods. These projects are managed through the Idaho National Laboratory (INL) and the Organisation for Economic Co-operation and Development Nuclear Energy Agency (OECD-NEA). Staff and students at the Department of Energy - Idaho (DOE-ID) and INL are engaged in the development of benchmarks to support ongoing research activities. These benchmarks include reactors or assemblies that support Next Generation Nuclear Plant (NGNP) research, space nuclear Fission Surface Power System (FSPS) design validation, and currently operational facilities in Southeastern Idaho.

  8. Alfred P. Gage and the Introductory Physics Laboratory

    Science.gov (United States)

    Greenslade, Thomas B., Jr.

    2016-01-01

    This article is about a late 19th-century teacher of secondary school physics. I was originally interested in the apparatus that he sold. This led me to the physics books that he wrote, and these took me to his unusual ideas about ways to use laboratory time to introduce students to the phenomena of physics. More than 100 years later educational…

  9. Concepts in Physical Education with Laboratories and Experiments. Second Edition.

    Science.gov (United States)

    Corbin, Charles B.; And Others

    This text is designed for student use in introductory course of physical education at the college level and deals with the specific areas of physical activity, exercise, health, physical fitness, skill learning, and body mechanics. Twenty concepts and thirty accompanying laboratory exercises suitable for both men and women are presented. Two…

  10. Nuclear Physics Laboratory 1979 annual report

    International Nuclear Information System (INIS)

    Adelberger, E.G.

    1979-07-01

    Research progress is reported in the following areas: astrophysics and cosmology, fundamental symmetries, nuclear structure, radiative capture, medium energy physics, heavy ion reactions, research by users and visitors, accelerator and ion source development, instrumentation and experimental techniques, and computers and computing. Publications are listed

  11. Nuclear Physics Laboratory 1979 annual report

    Energy Technology Data Exchange (ETDEWEB)

    Adelberger, E.G. (ed.)

    1979-07-01

    Research progress is reported in the following areas: astrophysics and cosmology, fundamental symmetries, nuclear structure, radiative capture, medium energy physics, heavy ion reactions, research by users and visitors, accelerator and ion source development, instrumentation and experimental techniques, and computers and computing. Publications are listed. (WHK)

  12. Neutron Stars: Laboratories for Fundamental Physics Under ...

    Indian Academy of Sciences (India)

    DEBADES BANDYOPADHYAY

    2017-09-07

    Sep 7, 2017 ... American Physical Society in 1933, Baade & Zwicky ... of pulsars and black holes using the SKA and LIGO-. India along with other ..... a black hole. Different groups investigated the problem of stability of a PNS for short times. When a PNS is made up of nucleons and leptons, it has a slightly smaller max-.

  13. Nuclear Physics Laboratory 1980 annual report

    Energy Technology Data Exchange (ETDEWEB)

    Adelberger, E.G. (ed.)

    1980-09-01

    Research progress is reported in the following areas: astrophysics and cosmology, fundamental symmetries, nuclear structure and reactions, radiative capture, medium energy physics, heavy ion reactions, research by outside users, accelerators and ion sources, instrumentation and experimental techniques, and computers and computing. Publications are listed. (WHK)

  14. Nuclear Physics Laboratory 1980 annual report

    International Nuclear Information System (INIS)

    Adelberger, E.G.

    1980-09-01

    Research progress is reported in the following areas: astrophysics and cosmology, fundamental symmetries, nuclear structure and reactions, radiative capture, medium energy physics, heavy ion reactions, research by outside users, accelerators and ion sources, instrumentation and experimental techniques, and computers and computing. Publications are listed

  15. Nuclear Physics Laboratory 1981 annual report

    International Nuclear Information System (INIS)

    1981-06-01

    Research progress is reported in the following areas: astrophysics and cosmology, nuclear tests of fundamental symmetries, parity mixing in the hydrogen atom, nuclear structure and reactions, radiative capture, medium energy physics, heavy ion reactions, research by outside users, accelerators and ion sources, final design and construction of the magnetic momentum filter, instrumentation and experimental techniques, and computers and computing. Publications are listed

  16. Worlds largest particle physics laboratory selects Proxim Wireless Mesh

    CERN Multimedia

    2007-01-01

    "Proxim Wireless has announced that the European Organization for Nuclear Research (CERN), the world's largest particle physics laboratory and the birthplace of the World Wide Web, is using it's ORiNOCO AP-4000 mesh access points to extend the range of the laboratory's Wi-Fi network and to provide continuous monitoring of the lab's calorimeters" (1/2 page)

  17. THE EMPLOYMENT OF COMPUTER TECHNOLOGIES IN LABORATORY COURSE ON PHYSICS

    Directory of Open Access Journals (Sweden)

    Liudmyla M. Nakonechna

    2010-08-01

    Full Text Available Present paper considers the questions on development of conceptually new virtual physical laboratory, the employment of which into secondary education schools will allow to check the theoretical knowledge of students before laboratory work and to acquire the modern methods and skills of experiment.

  18. THE EMPLOYMENT OF COMPUTER TECHNOLOGIES IN LABORATORY COURSE ON PHYSICS

    OpenAIRE

    Liudmyla M. Nakonechna

    2010-01-01

    Present paper considers the questions on development of conceptually new virtual physical laboratory, the employment of which into secondary education schools will allow to check the theoretical knowledge of students before laboratory work and to acquire the modern methods and skills of experiment.

  19. The chemical physics of surfaces

    CERN Document Server

    Morrison, Stanley Roy

    1990-01-01

    Even more importantly, some authors who have contributed substantially to an area may have been overlooked. For this I apologize. I have, however, not attempted to trace techniques or observa­ tions historically, so there is no implication (unless specified) that the authors referred to were or were not the originators of a given method or observation. I would like to acknowledge discussions with co-workers at SFU for input relative to their specialties, to acknowledge the help of students who have pointed out errors and difficulties in the earlier presentation, and to acknowledge the infinite patience of my wife Phyllis while I spent my sabbatical and more in libraries and punching computers. S. Roy Morrison 0 1 Contents Notation XV 1. Introduction 1 1. 1. Surface States and Surface Sites . 1 1. 1. 1. The Chemical versus Electronic Representation of the Surface. 1 1. 1. 2. The Surface State on the Band Diagram 4 1. 1. 3. The Fermi Energy in the Surface State Model. 6 1. 1. 4. Need for Both Surface...

  20. Nuclear Physics Laboratory technical progress report

    International Nuclear Information System (INIS)

    1991-01-01

    This contract supports broadly based experimental work in intermediate energy nuclear physics. The program includes pion- nucleon studies at TRIUMF and LAMPF, inelastic pion scattering and charge exchange reactions at LAMPF, and nucleon charge exchange at LAMPF/NTOF. The first results of spin-transfer observables in the isovector (rvec p,rvec n) reaction are included in this report. Our data confirm the tentative result from (rvec p,rvec p) reactions that the nuclear isovector spin response shows neither longitudinal enhancement nor transverse quenching. Our program in quasifree scattering of high energy pions shows solid evidence of isoscalar enhancement of the nuclear nonspin response. We include several comparisons of the quasifree scattering of different probes. Results from our efforts in the design of accelerator RF cavities are also included in this report

  1. Laboratory portrait: the Saclay nuclear physics division

    International Nuclear Information System (INIS)

    Alamanos, N.; Auger, F.

    2005-01-01

    The research activities of the nuclear physics division (SPHN) of DAPNIA (Cea) take place within strong national and international collaborations. Its programs cover a broad range of topics in nuclear physics from low to high energies, they include the structure and dynamics of the nucleus, the structure of the nucleon, the search for phase transitions in nuclear matter, and contribution to the development of nuclear energy. Concerning the structure of the nucleus, SPHN is involved in the study of the structure of light exotic nuclei such as He 6-8 , C 10-11 , Ne 27 and in the study of shape coexistence in Kr isotopes. The experiments are performed at GANIL. SPHN is also involved in the study of the structure of Md 251 through experiments made in Finland. Near-barrier and sub-barrier fusion of light unstable nuclei and their respective stable isotopes with U 238 targets are studied in Louvain-la-Neuve (Belgium). Concerning nuclear phase transitions, the purpose of our activities is twofold: the study of the liquid-gas phase transition in nuclei at relatively low incident energies and the search for the quark-gluon plasma (QGP) at very high energies. We look for QGP signatures in 2 experiments: Phenix with the accelerator RHIC at Bnl and Alice at the LHC (CERN). Concerning the structure of the nucleon, SPHN is involved in 2 experimental programs both using electromagnetic probes, one to obtain information on the spin carried by the gluons in the proton (Compass at CERN) and the other to extract information on generalized parton distributions by means of deeply virtual Compton scattering (Clas at Jlab). Concerning nuclear energy, the activities are focused along 3 main lines: spallation studies, neutron cross-section measurements and application oriented modeling. (A.C.)

  2. Impact Crater Experiments for Introductory Physics and Astronomy Laboratories

    Science.gov (United States)

    Claycomb, J. R.

    2009-01-01

    Activity-based collisional analysis is developed for introductory physics and astronomy laboratory experiments. Crushable floral foam is used to investigate the physics of projectiles undergoing completely inelastic collisions with a low-density solid forming impact craters. Simple drop experiments enable determination of the average acceleration,…

  3. Surface Radiation from GOES: A Physical Approach; Preprint

    Energy Technology Data Exchange (ETDEWEB)

    Habte, A.; Sengupta, M.; Wilcox, S.

    2012-09-01

    Models to compute Global Horizontal Irradiance (GHI) and Direct Normal Irradiance (DNI) have been in development over the last 3 decades. These models can be classified as empirical or physical, based on the approach. Empirical models relate ground based observations with satellite measurements and use these relations to compute surface radiation. Physical models consider the radiation received from the earth at the satellite and create retrievals to estimate surface radiation. While empirical methods have been traditionally used for computing surface radiation for the solar energy industry the advent of faster computing has made operational physical models viable. The Global Solar Insolation Project (GSIP) is an operational physical model from NOAA that computes GHI using the visible and infrared channel measurements from the GOES satellites. GSIP uses a two-stage scheme that first retrieves cloud properties and uses those properties in a radiative transfer model to calculate surface radiation. NREL, University of Wisconsin and NOAA have recently collaborated to adapt GSIP to create a 4 km GHI and DNI product every 30 minutes. This paper presents an outline of the methodology and a comprehensive validation using high quality ground based solar data from the National Oceanic and Atmospheric Administration (NOAA) Surface Radiation (SURFRAD) (http://www.srrb.noaa.gov/surfrad/sitepage.html) and Integrated Surface Insolation Study (ISIS) http://www.srrb.noaa.gov/isis/isissites.html), the Solar Radiation Research Laboratory (SRRL) at National Renewable Energy Laboratory (NREL), and Sun Spot One (SS1) stations.

  4. APPLICATION OF INTERACTIVE ONLINE SIMULATIONS IN THE PHYSICS LABORATORY ACTIVITIES

    Directory of Open Access Journals (Sweden)

    Nina P. Dementievska

    2013-09-01

    Full Text Available Physics teachers should have professional competences, aimed at the use of online technologies associated with physical experiments. Lack of teaching materials for teachers in Ukrainian language leads to the use of virtual laboratories and computer simulations by traditional methods of education, not by the latest innovative modern educational technology, which may limit their use and greatly reduce their effectiveness. Ukrainian teaching literature has practically no information about the assessment of competencies, research skills of students for the laboratory activities. The aim of the article is to describe some components of instructional design for the Web site with simulations in school physical experiments and their evaluation.

  5. Laboratory Safety Awareness Among General Physics Undergraduate Students

    Directory of Open Access Journals (Sweden)

    C. O. Ponferrada

    2017-12-01

    Full Text Available Safety awareness in the laboratory is essential to reduce occupational risks. This study was conducted to determine the students’ safety awareness in a Physics laboratory. This study determined the student perception towards safety awareness by factors of gender and college from which students are enrolled. A sum of 324 students enrolled in Physics10 (Mechanics and Heat and Physics11 (Electricity and Magnetism in the Mindanao University of Science and Technology (MUST were randomly selected as survey respondents. A modified survey questionnaire was used as research instrument. The results show that the students had positive level of safety awareness and perceived positively on the preventive measures to reduce laboratory risk. Further, regardless of gender students enrolled in Physics 10 were more positively aware towards safety awareness than students enrolled in Physics 11. Similarly, a variation among the students perception towards safety awareness from the College of Engineering and Architecture (CEA and College of Industrial and Information Technology (CIIT occurred. Overall, present findings indicate a need to introduce laboratory safety awareness in Physics classes.

  6. Evaluation of a multiple goal revision of a physics laboratory

    Science.gov (United States)

    Bonham, Scott W.; Harper, Doug L.; Pauley, Lance

    2013-01-01

    This paper reports on the revision of the University Physics laboratory at Western Kentucky University. Multiple learning objectives were negotiated among faculty, and a curriculum was developed to address all of them. A full pilot was run in Spring 2012 with three experimental sections and two control sections. Data was collected using the Force and Motion Conceptual Evaluation, a self-efficacy survey, and performance on the laboratory final. Data from the pilot shows gains in conceptual understanding on certain topics, differences in a few laboratory skills, and improvement in technical writing ability as measured by both a writing sample and student perception.

  7. Physical and virtual laboratories in science and engineering education.

    Science.gov (United States)

    de Jong, Ton; Linn, Marcia C; Zacharia, Zacharias C

    2013-04-19

    The world needs young people who are skillful in and enthusiastic about science and who view science as their future career field. Ensuring that we will have such young people requires initiatives that engage students in interesting and motivating science experiences. Today, students can investigate scientific phenomena using the tools, data collection techniques, models, and theories of science in physical laboratories that support interactions with the material world or in virtual laboratories that take advantage of simulations. Here, we review a selection of the literature to contrast the value of physical and virtual investigations and to offer recommendations for combining the two to strengthen science learning.

  8. Recent Science Education Initiatives at the Princeton Plasma Physics Laboratory

    Science.gov (United States)

    Zwicker, Andrew; Dominguez, Arturo; Gershman, Sophia; Guilbert, Nick; Merali, Aliya; Ortiz, Deedee

    2013-10-01

    An integrated approach to program development and implementation has significantly enhanced a variety of Science Education initiatives for students and teachers. This approach involves combining the efforts of PPPL scientists, educators, research and education fellows, and collaborating non-profit organizations to provide meaningful educational experiences for students and teachers. Our undergraduate internship program continues to have outstanding success, with 72% of our participants going to graduate school and 45% concentrating in plasma physics. New partnerships have allowed us to increase the number of underrepresented students participating in mentored research opportunities. The number of participants in our Young Women's Conference increases significantly each year. Our Plasma Camp workshop, now in its 15th year, recruits outstanding teachers from around the country to create new plasma-centered curricula. Student research in the Science Education Laboratory concentrates on the development of a high-fidelity plasma speaker, a particle dropper for a dusty plasma experiment, microplasmas along liquid surfaces for a variety of applications, an Internet-controlled DC glow discharge source for students, and a Planeterrella for demonstrating the aurora and other space weather phenomenon for the general public.

  9. University of Washington, Nuclear Physics Laboratory annual report, 1995

    International Nuclear Information System (INIS)

    1995-04-01

    The Nuclear Physics Laboratory of the University of Washington supports a broad program of experimental physics research. The current program includes in-house research using the local tandem Van de Graff and superconducting linac accelerators and non-accelerator research in double beta decay and gravitation as well as user-mode research at large accelerator and reactor facilities around the world. This book is divided into the following areas: nuclear astrophysics; neutrino physics; nucleus-nucleus reactions; fundamental symmetries and weak interactions; accelerator mass spectrometry; atomic and molecular clusters; ultra-relativistic heavy ion collisions; external users; electronics, computing, and detector infrastructure; Van de Graff, superconducting booster and ion sources; nuclear physics laboratory personnel; degrees granted for 1994--1995; and list of publications from 1994--1995

  10. Particle Physics Committee annual report 1976-77, particle physics grants and laboratory agreements

    International Nuclear Information System (INIS)

    1977-01-01

    The Annual Report for the period 1 August 1976 to 31 July 1977 of the Particel Physics Committee of the Nuclear Physics Board, under the (United Kingdom) Science Research Council, is presented. Details are given of particle physics grants and laboratory agreements. (U.K.)

  11. Laboratory Determination of Thermal Protection System Materials Surface Catalytic Properties

    Science.gov (United States)

    2007-07-01

    Zalar, A., "Recombination of Neutral Hydrogen Atoms on AISI 304 Stainless Steel Surface," Applied Surface Science, Vol. 144-145, 1999, pp. 399-403. 57...and test environments. Typically, these fits contain only the temperature dependence of the loss probability, with no information on pressure or...generated in the MESOX test facility in the PROMES-CNRS laboratory on a variety of ceramic materials.47-50 The MESOX facility uses a flow tube

  12. Lawrence Livermore National Laboratory Surface Water Protection: A Watershed Approach

    Energy Technology Data Exchange (ETDEWEB)

    Coty, J

    2009-03-16

    This surface water protection plan (plan) provides an overview of the management efforts implemented at Lawrence Livermore National Laboratory (LLNL) that support a watershed approach to protect surface water. This plan fulfills a requirement in the Department of Energy (DOE) Order 450.1A to demonstrate a watershed approach for surface water protection that protects the environment and public health. This plan describes the use of a watershed approach within which the Laboratory's current surface water management and protections efforts have been structured and coordinated. With more than 800 million acres of land in the U.S. under federal management and stewardship, a unified approach across agencies provides enhanced resource protection and cost-effectiveness. The DOE adopted, along with other federal agencies, the Unified Federal Policy for a Watershed Approach to Federal Land and Resource Management (UFP) with a goal to protect water quality and aquatic ecosystems on federal lands. This policy intends to prevent and/or reduce water pollution from federal activities while fostering a cost-effective watershed approach to federal land and resource management. The UFP also intends to enhance the implementation of existing laws (e.g., the Clean Water Act [CWA] and National Environmental Policy Act [NEPA]) and regulations. In addition, this provides an opportunity for the federal government to serve as a model for water quality stewardship using a watershed approach for federal land and resource activities that potentially impact surface water and its uses. As a federal land manager, the Laboratory is responsible for a small but important part of those 800 million acres of land. Diverse land uses are required to support the Laboratory's mission and provide an appropriate work environment for its staff. The Laboratory comprises two sites: its main site in Livermore, California, and the Experimental Test Site (Site 300), near Tracy, California. The main site

  13. Surface physics of materials materials science and technology

    CERN Document Server

    Blakely, J M

    2013-01-01

    Surface Physics of Materials presents accounts of the physical properties of solid surfaces. The book contains selected articles that deal with research emphasizing surface properties rather than experimental techniques in the field of surface physics. Topics discussed include transport of matter at surfaces; interaction of atoms and molecules with surfaces; chemical analysis of surfaces; and adhesion and friction. Research workers, teachers and graduate students in surface physics, and materials scientist will find the book highly useful.

  14. Laboratory Study of Dispersion of Buoyant Surface Plumes

    DEFF Research Database (Denmark)

    Petersen, Ole; Larsen, Torben

    1990-01-01

    A laboratory a study on surface dispersion of buoyant plumes in open channel turbulence in made, where the buoyancy is due to both salinity and heat. The measured parameters are the downstream derivative of a plume width and height, which are integral-characteristics of the distributions of density...

  15. A Virtual Rock Physics Laboratory Through Visualized and Interactive Experiments

    Science.gov (United States)

    Vanorio, T.; Di Bonito, C.; Clark, A. C.

    2014-12-01

    As new scientific challenges demand more comprehensive and multidisciplinary investigations, laboratory experiments are not expected to become simpler and/or faster. Experimental investigation is an indispensable element of scientific inquiry and must play a central role in the way current and future generations of scientist make decisions. To turn the complexity of laboratory work (and that of rocks!) into dexterity, engagement, and expanded learning opportunities, we are building an interactive, virtual laboratory reproducing in form and function the Stanford Rock Physics Laboratory, at Stanford University. The objective is to combine lectures on laboratory techniques and an online repository of visualized experiments consisting of interactive, 3-D renderings of equipment used to measure properties central to the study of rock physics (e.g., how to saturate rocks, how to measure porosity, permeability, and elastic wave velocity). We use a game creation system together with 3-D computer graphics, and a narrative voice to guide the user through the different phases of the experimental protocol. The main advantage gained in employing computer graphics over video footage is that students can virtually open the instrument, single out its components, and assemble it. Most importantly, it helps describe the processes occurring within the rock. These latter cannot be tracked while simply recording the physical experiment, but computer animation can efficiently illustrate what happens inside rock samples (e.g., describing acoustic waves, and/or fluid flow through a porous rock under pressure within an opaque core-holder - Figure 1). The repository of visualized experiments will complement lectures on laboratory techniques and constitute an on-line course offered through the EdX platform at Stanford. This will provide a virtual laboratory for anyone, anywhere to facilitate teaching/learning of introductory laboratory classes in Geophysics and expand the number of courses

  16. Surface physics theoretical models and experimental methods

    CERN Document Server

    Mamonova, Marina V; Prudnikova, I A

    2016-01-01

    The demands of production, such as thin films in microelectronics, rely on consideration of factors influencing the interaction of dissimilar materials that make contact with their surfaces. Bond formation between surface layers of dissimilar condensed solids-termed adhesion-depends on the nature of the contacting bodies. Thus, it is necessary to determine the characteristics of adhesion interaction of different materials from both applied and fundamental perspectives of surface phenomena. Given the difficulty in obtaining reliable experimental values of the adhesion strength of coatings, the theoretical approach to determining adhesion characteristics becomes more important. Surface Physics: Theoretical Models and Experimental Methods presents straightforward and efficient approaches and methods developed by the authors that enable the calculation of surface and adhesion characteristics for a wide range of materials: metals, alloys, semiconductors, and complex compounds. The authors compare results from the ...

  17. Nuclear Physics Laboratory, University of Washington annual report

    International Nuclear Information System (INIS)

    1998-04-01

    The Nuclear Physics Laboratory at the University of Washington in Seattle pursues a broad program of nuclear physics. These activities are conducted locally and at remote sites. The current programs include in-house research using the local tandem Van de Graaff and superconducting linac accelerators and non-accelerator research in solar neutrino physics at the Sudbury Neutrino Observatory in Canada and at SAGE in Russia, and gravitation as well as user-mode research at large accelerators and reactor facilities around the world. Summaries of the individual research projects are included. Areas of research covered are: fundamental symmetries, weak interactions and nuclear astrophysics; neutrino physics; nucleus-nucleus reactions; ultra-relativistic heavy ions; and atomic and molecular clusters

  18. Nuclear Physics Laboratory, University of Washington annual report

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1998-04-01

    The Nuclear Physics Laboratory at the University of Washington in Seattle pursues a broad program of nuclear physics. These activities are conducted locally and at remote sites. The current programs include in-house research using the local tandem Van de Graaff and superconducting linac accelerators and non-accelerator research in solar neutrino physics at the Sudbury Neutrino Observatory in Canada and at SAGE in Russia, and gravitation as well as user-mode research at large accelerators and reactor facilities around the world. Summaries of the individual research projects are included. Areas of research covered are: fundamental symmetries, weak interactions and nuclear astrophysics; neutrino physics; nucleus-nucleus reactions; ultra-relativistic heavy ions; and atomic and molecular clusters.

  19. Advances in Measurement Technology at NIST's Physical Measurement Laboratory

    Science.gov (United States)

    Dehmer, Joseph

    2014-03-01

    The NIST mission is to promote U.S. innovation and industrial competitiveness by advancing measurement science, standards, and technology. The Physical Measurement Laboratory (PML) has responsibility for maintaining national standards for two dozen physical quantities needed for international trade; and, importantly, it carries out advanced research at the frontiers of measurement science to enable extending innovation into new realms and new markets. This talk will highlight advances being made across several sectors of technology; and it will describe how PML interacts with its many collaborators and clients in industry, government, and academe.

  20. Biological and Physical Space Research Laboratory 2002 Science Review

    Science.gov (United States)

    Curreri, P. A. (Editor); Robinson, M. B. (Editor); Murphy, K. L. (Editor)

    2003-01-01

    With the International Space Station Program approaching core complete, our NASA Headquarters sponsor, the new Code U Enterprise, Biological and Physical Research, is shifting its research emphasis from purely fundamental microgravity and biological sciences to strategic research aimed at enabling human missions beyond Earth orbit. Although we anticipate supporting microgravity research on the ISS for some time to come, our laboratory has been vigorously engaged in developing these new strategic research areas.This Technical Memorandum documents the internal science research at our laboratory as presented in a review to Dr. Ann Whitaker, MSFC Science Director, in July 2002. These presentations have been revised and updated as appropriate for this report. It provides a snapshot of the internal science capability of our laboratory as an aid to other NASA organizations and the external scientific community.

  1. Replacement of the Idaho National Engineering Laboratory Health Physics Instrumentation Laboratory

    International Nuclear Information System (INIS)

    1995-05-01

    The DOE-Idaho Operations Office (DOE-ID) has prepared an environmental assessment (EA) on the replacement of the Idaho National Engineering Laboratory Health Physics Instrumentation Laboratory at the Idaho National Engineering Laboratory (INEL). The purpose of this project is to replace the existing Health Physics Instrumentation Laboratory (HPIL) with a new facility to provide a safe environment for maintaining and calibrating radiation detection instruments used at the Idaho National Engineering Laboratory. The existing HPIL facility provides portable health physics monitoring instrumentation and direct reading dosimetry procurement, maintenance and calibration of radiation detection instruments, and research and development support-services to the INEL and others. However, the existing facility was not originally designed for laboratory activities and does not provide an adequate, safe environment for calibration activities. The EA examined the potential environmental impacts of the proposed action and evaluated reasonable alternatives, including the no action alternative in accordance with the Council on Environmental Quality (CEQ) Regulations (40 CFR Parts 1500-1508). Based on the environmental analysis in the attached EA, the proposed action will not have a significant effect on the human environment within the meaning of the National Environmental Policy Act (NEPA) and 40 CFR Parts 1508.18 and 1508.27. The selected action (the proposed alternative) is composed of the following elements, each described or evaluated in the attached EA on the pages referenced. The proposed action is expected to begin in 1997 and will be completed within three years: design and construction of a new facility at the Central Facility Area of the INEL; operation of the facility, including instrument receipt, inspections and repairs, precision testing and calibration, and storage and issuance. The selected action will result in no significant environmental impacts

  2. Princeton Plasma Physics Laboratory FY2003 Annual Highlights

    Energy Technology Data Exchange (ETDEWEB)

    Editors: Carol A. Phillips; Anthony R. DeMeo

    2004-08-23

    The Princeton Plasma Physics Laboratory FY2003 Annual Highlights report provides a summary of the activities at the Laboratory for the fiscal year--1 October 2002 through 30 September 2003. The report includes the Laboratory's Mission and Vision Statements, a message ''From the Director,'' summaries of the research and engineering activities by project, and sections on Technology Transfer, the Graduate and Science Education Programs, Awards and Honors garnered by the Laboratory and the employees, and the Year in Pictures. There is also a listing of the Laboratory's publications for the year and a section of the abbreviations, acronyms, and symbols used throughout the report. In the PDF document, links have been created from the Table of Contents to each section. You can also return to the Table of Contents from the beginning page of each section. The PPPL Highlights for fiscal year 2003 is also available in hardcopy format. To obtain a copy e-mail Publications and Reports at: pub-reports@pppl.gov. Be sure to include your complete mailing address

  3. Princeton Plasma Physics Laboratory for FY2003. Annual Highlights

    International Nuclear Information System (INIS)

    Phillips, Carol A.; DeMeo, Anthony R.

    2004-01-01

    The Princeton Plasma Physics Laboratory FY2003 Annual Highlights report provides a summary of the activities at the Laboratory for the fiscal year--1 October 2002 through 30 September 2003. The report includes the Laboratory's Mission and Vision Statements, a message ''From the Director,'' summaries of the research and engineering activities by project, and sections on Technology Transfer, the Graduate and Science Education Programs, Awards and Honors garnered by the Laboratory and the employees, and the Year in Pictures. There is also a listing of the Laboratory's publications for the year and a section of the abbreviations, acronyms, and symbols used throughout the report. In the PDF document, links have been created from the Table of Contents to each section. You can also return to the Table of Contents from the beginning page of each section. The PPPL Highlights for fiscal year 2003 is also available in hardcopy format. To obtain a copy e-mail Publications and Reports at: pub-reports at pppl.gov. Be sure to include your complete mailing address

  4. Physical Readiness Testing of Surface Warfare Officers

    Science.gov (United States)

    1991-06-01

    NA% I PHISICAL READIiESS TEST (PRT QUEST1OthAIRE I. hE ARE CONDUCTI NG THESIS RESEAR H 0N HO- ELL THE PRT SUPPORT5 TNE R 0 T i E 0F St RF AC E ’ARAR...AD-A245 519 NAVAL POSTGRADUATE SCHOOL Monterey, California DTIC CTE.EC a% FEB071992 CI THESIS Physical Readiness Testing of Surface Warfare Officers...READINESS TESTING OF SURFACE WARFARE OFFICERS 12. PERSONAL AUTHOR(S) Hatch, William D. II and Swinney, Lori D. 13a. TYPE OF REPORT 13b. TIME COVERED 14

  5. Laboratory measurements of dusty surface charging in plasma.

    Science.gov (United States)

    Chou, Kevin; Wang, Joseph

    2017-09-01

    A novel method is developed to study the charging of a conducting surface covered by a thin dust layer in plasma. The potential profile in the dust layer and the floating potential of the surface underneath are measured directly by embedding conducting wires in the dust and connecting the wires to a measurement plate outside the vacuum chamber, where a Trek non-contacting electrostatic voltmeter measures the floating potential of the measurement plate. Laboratory experiments are carried out to study plasma charging of a conducting plate covered by lunar dust simulant, JSC-1A. The results show that the plate potential is dependent on both the ambient plasma condition and the dust layer thickness. The current balance condition controls the floating potential of the dust surface while the dust layer acts as a capacitor and controls the potential of the plate with respect to the dust surface. Hence, a dust covered conducting plate will be charged more negatively than a clean plate.

  6. Surface effects in black hole physics

    International Nuclear Information System (INIS)

    Damour, T.

    1982-01-01

    This contribution reviews briefly the various analogies which have been drawn between black holes and ordinary physical objects. It is shown how, by concentrating on the properties of the surface of a black hole, it is possible to set up a sequence of tight analogies allowing one to conclude that a black hole is, qualitatively and quantitatively, similar to a fluid bubble possessing a negative surface tension and endowed with finite values of the electrical conductivity and of the shear and bulk viscosities. These analogies are valid simultaneously at the levels of electromagnetic, mechanical and thermodynamical laws. Explicit applications of this framework are worked out (eddy currents, tidal drag). The thermostatic equilibrium of a black hole electrically interacting with its surroundings is discussed, as well as the validity of a minimum entropy production principle in black hole physics. (Auth.)

  7. Dose measurements in laboratory of Physics department, University of Khartoum

    International Nuclear Information System (INIS)

    Hamid, Maria Mohammed

    1999-05-01

    Personal monitoring in University of Khartoum is being conducted using thermoluminescent dosimetry. The purpose of the study is to measure the dose of radiation in laboratory of Physics in physics department. TL phosphors LiF: Mg, Ti (card) and LiF Mg, Cu, P (GR-200) and mini-rad dosimeter are used to measure the dose in laboratory. The total dose for students form the laboratory bu using card, GR-200 and mini-rad dosimeter was found to be 2.2μ sv/year. 2.5 μ sv/year and 2.6 μ sv respectively, and for the teacher about 4.0 μ sv/year, 5.8 μ sv/year and 13.6 μ sv/year respectively, and for the dose near junk room about 3.9 μ sv/year, 2.9 μ sv/year and 2.8 μ sv/year by using card, GR-200 and mini-rad dosimeter respectively. There is just a background radiation in the main library and the applied nuclear.(Author)

  8. MULTIMEDIA VIRTUAL LABORATORY FOR PHYSICS IN THE DISTANCE LEARNING

    Directory of Open Access Journals (Sweden)

    H. M. Kravtsov

    2014-04-01

    Full Text Available It’s presented the results of the software module "Virtual Lab" for distance learning system «Kherson Virtual University" (DLS KVU applied to the problems of physics. Relevance of research due to the absence of existing DLS to support the creation and use of virtual labs in the disciplines of science cycle. The subject of this study is a software module to create and use virtual labs in distance learning system. The purpose of the study is a description of software technology of virtual laboratory in physics for distance learning system. It’s described the information technology, which used in design and development, as well as the structure of the virtual laboratory and its place in the DLS KVU. It’s described the principal modes of operation of the program module in the system and methods for its use in the educational process. The basic structure of the software module "Virtual Lab" is a multimedia Web editor of virtual labs, which was created using Object-oriented analysis and design technology. Software library of multimedia 3D objects, which was created in the development environment of interactive graphics Unity3D, unifies the process of creating and processing virtual labs. Basic mathematical calculations support the math processor Waterloo Maple. The developed software interface allows teachers to create laboratory and use them in their distance courses. Students, in turn, will be able to conduct research, performing virtual labs.

  9. Surface concrete decontamination equipment developed by Pacific Northwest Laboratory

    International Nuclear Information System (INIS)

    Halter, J.M.; Sullivan, R.G.; Bevan, J.L.

    1982-08-01

    This report documents a project that the Pacific Northwest Laboratory conducted to identify and develop techniques for removing contaminated concrete surfaces. A major problem associated with nuclear facility decontamination and decommissioning is how to economically demolish and dispose of contaminated concrete. Removing only the contaminated portion of the concrete can substantially reduce costs. Evaluation of various methods for removing concrete surfaces shows that several techniques presently used require excessive manpower, time, and energy. Many times more material is removed than necessary, increasing the quantity of waste that must be handled under controlled conditions. These evaluations generated the basic criteria for developing a suitable concrete removal technique: provide a convenient method for cleaning surfaces (such as those contaminated by a small spill); reduce the contaminated waste volume that has to be placed into controlled storage; remove surfaces quickly; and minimize personal exposure to potentially harmful radiation or toxic materials. Removal to 1/4 to 1/2 in. of contaminated surface layer is sufficient for cleanup of most facilities. Two unique decontamination methods have been developed: the concrete spaller and the water cannon. The concrete spaller is the most efficient technique: it removes the concrete surface faster than the water cannons and at a lower cost (as little as $3.00/ft 2 of concrete surface). However, the .458 magnum water cannon may be well suited for small or hard-to-reach locations

  10. Introduction to plasma physics with space, laboratory and astrophysical applications

    CERN Document Server

    Gurnett, Donald A

    2017-01-01

    Introducing basic principles of plasma physics and their applications to space, laboratory and astrophysical plasmas, this new edition provides updated material throughout. Topics covered include single-particle motions, kinetic theory, magnetohydrodynamics, small amplitude waves in hot and cold plasmas, and collisional effects. New additions include the ponderomotive force, tearing instabilities in resistive plasmas and the magnetorotational instability in accretion disks, charged particle acceleration by shocks, and a more in-depth look at nonlinear phenomena. A broad range of applications are explored: planetary magnetospheres and radiation belts, the confinement and stability of plasmas in fusion devices, the propagation of discontinuities and shock waves in the solar wind, and analysis of various types of plasma waves and instabilities that can occur in planetary magnetospheres and laboratory plasma devices. With step-by-step derivations and self-contained introductions to mathematical methods, this book...

  11. The Advanced Laboratory: beyond the ``black box'' to real physics

    Science.gov (United States)

    Zimmerman, George; Sulak, Lawrence

    2008-04-01

    The balance between theory and experiment in present physics curricula is too heavily weighted towards theory. Our physics majors do not realize that ``truth in physics'' depends either on experimental verification of theoretical predictions or on serendipitous discovery. Nor do they appreciate that most theories originate to explain experimental facts. They regard instruments as ``black boxes'' (although usually they are painted a different color). The Advanced Laboratory is essentially the only place in the curriculum where students confront the link between theory and experiment. In this age of disposing of (rather than repairing) equipment, Advanced Lab gives students insight into the inner workings of instruments and essential hands-on skills exploiting them: soldering wires, transferring cryo liquids, achieving high vacuum, acquiring reliable data, evaluating errors, fitting data, and drafting a PRL. Students learn techniques critical to several branches of physics, leading to different experimental approaches in their eventual work. If a student pursues theory, AdLab teaches her how to evaluate experiments, experimentalists, and their data. The basic skills learned, and the resulting understanding of physics, will be illustrated with the experiment on the Quantum Hall Effect from our AdLab.

  12. Laboratory for Nuclear Science. High Energy Physics Program

    Energy Technology Data Exchange (ETDEWEB)

    Milner, Richard [Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States)

    2014-07-30

    High energy and nuclear physics research at MIT is conducted within the Laboratory for Nuclear Science (LNS). Almost half of the faculty in the MIT Physics Department carry out research in LNS at the theoretical and experimental frontiers of subatomic physics. Since 2004, the U.S. Department of Energy has funded the high energy physics research program through grant DE-FG02-05ER41360 (other grants and cooperative agreements provided decades of support prior to 2004). The Director of LNS serves as PI. The grant supports the research of four groups within LNS as “tasks” within the umbrella grant. Brief descriptions of each group are given here. A more detailed report from each task follows in later sections. Although grant DE-FG02-05ER41360 has ended, DOE continues to fund LNS high energy physics research through five separate grants (a research grant for each of the four groups, as well as a grant for AMS Operations). We are pleased to continue this longstanding partnership.

  13. Transforming the Learning Environment of Undergraduate Physics Laboratories to Enhance Physics Inquiry Processes

    Directory of Open Access Journals (Sweden)

    Gregory P. Thomas

    2017-04-01

    Full Text Available Concerns persist regarding the lack of promotion of students’ scientific inquiry processes in undergraduate physics laboratories. The consensus in the literature is that, especially in the early years of undergraduate physics programs, students’ laboratory work is characterized by recipe type, step-by-step instructions for activities where the aim is often confirmation of an already well-established physics principle or concept. In response to evidence reflecting these concerns at their university, the authors successfully secured funding for this study. A mixed-method design was employed. In the 2011/2012 academic year baseline data were collected. A quantitative survey, the Undergraduate Physics Laboratory Learning Environment Scale (UPLLES was developed, validated, and used to explore students’ perceptions of their physics laboratory environments. Analysis of data from the UPLLES and from interviews confirmed the concerns evident in the literature and in a previous evaluation of laboratories undertaken in 2002. To address these concerns the activities that students were to perform in the laboratory section of the course/s were re/designed to engage students in more inquiry oriented thinking and activity. In Fall 2012, the newly developed laboratory activities and tutorials, were implemented for the first time in PHYS124; a first year course. These changes were accompanied by structured training of teaching assistants and changes to the structure of the evaluation of students’ laboratory performance. At the end of that term the UPLLES was administered (n = 266 and interviews with students conducted (n = 16 to explore their perceptions of their laboratory environments. Statistically significant differences (p<.001 between the students in the PHYS 124 classes of 2011/2012 and 2012/2013 across all dimensions were found. Effect sizes of 0.82 to 1.3, between the views of students in the first semester physics classes of 2011/2012 and 2012

  14. Coal surface control for advanced physical fine coal cleaning technologies

    Energy Technology Data Exchange (ETDEWEB)

    Morsi, B.I.; Chiang, S.H.; Sharkey, A.; Blachere, J.; Klinzing, G.; Araujo, G.; Cheng, Y.S.; Gray, R.; Streeter, R.; Bi, H.; Campbell, P.; Chiarlli, P.; Ciocco, M.; Hittle, L.; Kim, S.; Kim, Y.; Perez, L.; Venkatadri, R.

    1992-01-01

    This final report presents the research work carried out on the Coal Surface Control for Advanced Physical Fine Coal Cleaning Technologies project, sponsored by the US Department of Energy, Pittsburgh Energy Technology Center (DOE/PETC). The project was to support the engineering development of the selective agglomeration technology in order to reduce the sulfur content of US coals for controlling SO[sub 2] emissions (i.e., acid rain precursors). The overall effort was a part of the DOE/PETCs Acid Rain Control Initiative (ARCI). The overall objective of the project is to develop techniques for coal surface control prior to the advanced physical fine coal cleaning process of selective agglomeration in order to achieve 85% pyrite sulfur rejection at an energy recovery greater than 85% based on run-of-mine coal. The surface control is meant to encompass surface modification during grinding and laboratory beneficiation testing. The project includes the following tasks: Project planning; methods for analysis of samples; development of standard beneficiation test; grinding studies; modification of particle surface; and exploratory R D and support. The coal samples used in this project include three base coals, Upper Freeport - Indiana County, PA, Pittsburgh NO. 8 - Belmont County, OH, and Illinois No. 6 - Randolph County, IL, and three additional coals, Upper Freeport - Grant County- WV, Kentucky No. 9 Hopkins County, KY, and Wyodak - Campbell County, WY. A total of 149 drums of coal were received.

  15. Clinical and laboratory surface finishing procedures for zirconia on opposing human enamel wear: A laboratory study.

    Science.gov (United States)

    Chong, Bevan J; Thangavel, Arun K; Rolton, Shane B; Guazzato, Massimiliano; Klineberg, Iven J

    2015-10-01

    To investigate the effect of laboratory and clinical finishing procedures for zirconia on antagonistic enamel wear. Forty-eight yttria-tetragonal partially stabilised zirconia (Y-TZP) specimens were prepared and divided into four groups according to their surface preparation: laboratory polished (LP); laboratory polished and glazed (G); clinically adjusted (CA); and clinically adjusted and repolished (CAR). Enamel opposing enamel was used as a control. Pre-testing surface roughness for each group was determined using contact profilometry. Two-body wear resistance tests were conducted using a masticatory simulator. Enamel specimens were subjected to 120,000 cycles in distilled water (frequency 1.6 Hz, loading force of 49 N). Volumetric and vertical enamel losses were measured by superimposition of pre- and post-testing images using a three-dimensional laser scanner and software analysis. Scanning electron microscopy was used for qualitative surface analysis of pre- and post-testing zirconia and enamel surfaces. One-way ANOVA and multiple comparisons with Bonferroni corrections were used for statistical analysis at a significance level of α=0.05. There was no statistical difference in volumetric and vertical enamel loss between CAR, G and LP. CAR produced statistically significantly less volumetric enamel loss compared with CA and control, and statistically significantly less vertical enamel loss compared with CA. Volumetric and vertical enamel loss were highly correlated in all groups. Enamel wear by clinically ground zirconia is comparable to that of opposing enamel surfaces and greater than clinically repolished zirconia. Repolishing of zirconia restorations following clinical adjustment with diamond burs is effective in reducing antagonistic enamel wear. Copyright © 2015 Elsevier Ltd. All rights reserved.

  16. Exploring extreme plasma physics in the laboratory and in astrophysics

    Science.gov (United States)

    Silva, L. O.; Grismayer, T.; Fonseca, R. A.; Cruz, F.; Gaudio, F. D.; Martins, J. L.; Vieira, J.; Vranic, M.

    2017-10-01

    The interaction of ultra intense fields with plasmas is at the confluence of several sub-fields ranging from QED, and nuclear physics to high energy astrophysics, and fundamental plasma processes. It requires novel theoretical tools, highly optimised numerical codes and algorithms tailored to these complex scenarios, where physical mechanisms at very disparate temporal and spatial scales are self-consistently coupled in multidimensional geometries. The key developments implemented in Osiris will be presented along with some examples of problems, relevant for laboratory or astrophysical scenarios, that are being addressed resorting to the combination of massively parallel simulations with theoretical models. The relevance for near future experimental facilities such as ELI will also be presented. Work supported by the European Research Council (ERC-AdG-2015 InPairs Grant No. 695088).

  17. Theory of magnetism application to surface physics

    CERN Document Server

    Diep, Hung T

    2014-01-01

    The book is intended for graduate students and researchers who wish to master the main properties of magnetic materials in the bulk state and at the nanometric scale such as for thin films and multilayers. This textbook provides the theories and methods of simulation to study and to understand these properties in an explicit manner. In the first part of the book, the quantum theory of magnetism is presented while the second part of the book is devoted to the application of the theory of magnetism to surface physics. Numerous examples covering typical cases in ferromagnets, antiferromagnets, ferrimagnets, helimagnets, and frustrated spin systems are all illustrated. Fundamental surface effects are shown and discussed. Lastly, the spin transport is described — in which the basic formulation of the Boltzmann's equation is recalled — and the recent methods of Monte Carlo simulation to deal with the spin resistivity are explained. This book contains a large number of detailed solutions for the problems given ...

  18. TEACHING PHYSICS: Stockholm Science Laboratory for Schools: a complement to the traditional education system

    Science.gov (United States)

    Johansson, K. E.; Nilsson, Ch

    1999-11-01

    The Science Laboratory for Schools is a physics laboratory at the Department of Physics at Stockholm University in Sweden. The laboratory plays an important role in making modern physics accessible to teachers, school classes and individual students. It is a resource for the teachers and their classes, and a complement to the traditional education system.

  19. Laboratory Experiments in Physics for Modern Astronomy With Comprehensive Development of the Physical Principles

    CERN Document Server

    Golden, Leslie

    2013-01-01

    This book presents experiments which will teach physics relevant to astronomy. The astronomer, as instructor, frequently faces this need when his college or university has no astronomy department and any astronomy course is taught in the physics department. The physicist, as instructor, will find this intellectually appealing when faced with teaching an introductory astronomy course. From these experiments, the student will acquire important analytical tools, learn physics appropriate to astronomy, and experience instrument calibration and the direct gathering and analysis of data. Experiments that can be performed in one laboratory session as well as semester-long observation projects are included. This textbook is aimed at undergraduate astronomy students.

  20. The laboratory station for tyres grip testing on different surfaces

    Science.gov (United States)

    Kalinowski, K.; Grabowik, C.; Janik, W.; Ćwikła, G.; Skowera, M.

    2015-11-01

    The paper presents the conception of the device for tyre grip testing in the laboratory conditions. The main purpose is to provide a device working in confined spaces, which enables rapid changes of the tested samples of the road surfaces. Among the key assumptions the minimization of the device dimensions and the relative ease of transportation and mobility - the ability to quick assemble and disassemble were also assumed. The main components of the projected workstation includes: the replaceable platform for mounting samples of a road surface, the roller conveyor, the drive of the platform, the wheel mounting assembly and the axial force measuring system. At the design the station a morphological structure method has been used, particular elements have been optimized individually.

  1. Fast Magnetic Reconnection: Bridging Laboratory and Space Plasma Physics

    Energy Technology Data Exchange (ETDEWEB)

    Bhattacharjee, Amitava [University New Hampshire- Durham

    2012-02-16

    Recent developments in experimental and theoretical studies of magnetic reconnection hold promise for providing solutions to outstanding problems in laboratory and space plasma physics. Examples include sawtooth crashes in tokamaks, substorms in the Earth’s Magnetosphere, eruptive solar flares, and more recently, fast reconnection in laser-produced high energy density plasmas. In each of these examples, a common and long-standing challenge has been to explain why fast reconnection proceeds rapidly from a relatively quiescent state. In this talk, we demonstrate the advantages of viewing these problems and their solutions from a common perspective. We focus on some recent, surprising discoveries regarding the role of secondary plasmoid instabilities of thin current sheets. Nonlinearly, these instabilities lead to fast reconnection rates that are very weakly dependent on the Lundquist number of the plasma.

  2. Progress report: 1985. Laboratory of high energy nuclear physics

    International Nuclear Information System (INIS)

    1986-01-01

    Main research themas are experimental studies of elementary constituents of matter (quark, leptons,...) and of their fields (photons, gluons,...). Experiments in which the LPNHE (laboratory of high energy nuclear physics) participates are, at CERN, NA (4), NA (10), UA (7), NA (38); it collaborates at Modane to determination of proton mean life. It participates to Aleph experiment at Lep, and to studies aimed at H1 calorimeter construction at Hera. Different technical developments are going on; among them, the study of special detectors which use liquids at ambient temperature for charged particles. A group is aimed at fabrication and study of thin films of amorphous silicon and amorphous silicon-germanium alloys. A specialized reactor, the Arcam, allows stocking of thin films with different compositions [fr

  3. Physical Sciences Laboratory 1 Rooftop Stack Mixing Study

    Energy Technology Data Exchange (ETDEWEB)

    Flaherty, Julia E. [Pacific Northwest National Lab. (PNNL), Richland, WA (United States); Antonio, Ernest J. [Pacific Northwest National Lab. (PNNL), Richland, WA (United States)

    2016-09-30

    To address concerns about worker exposures on the Physical Science Laboratory (PSL) rooftop, a tracer study was conducted to measure gaseous tracer concentrations downwind of six stacks on the southern half of the PSL building (PSL-1). These concerns were raised, in part, due to the non-standard configuration of the stacks on this building. Five of the six stacks were only about 8 feet tall, with one shorter stack that was essentially level with the roof deck. These stacks were reconfigured in August 2016, and these exhaust points on PSL-1 are now 18 feet tall. This report describes the objectives of the tracer tests performed on PSL-1, provides an overview of how the tests were executed, and presents results of the tests. The tests on the PSL rooftop were a follow-on project from a similar study performed on the LSL-II ventilation exhaust (Flaherty and Antonio, 2016).

  4. Radiation monitors in national laboratory for high energy physics (NORM)

    International Nuclear Information System (INIS)

    Miyajima, Mitsuhiro

    1991-01-01

    In National Laboratory for High Energy Physics, in order to monitor these fields of radiation and radioactivity, the network of radiation monitors (NORM) is in operation. This continuous, centralized radiation monitoring system was designed and manufactured for the condition of adapting to the change and expansion of laboratories, accelerators and attached facilities. The NORM is composed of SARM, STATION and CENTER having different roles and functions, respectively. Those three components and their design are reported. Stand Alone Radiation Monitors (SARM) are installed at (1) controlled area of frequent entrance, (2) border area between controlled and non-controlled areas and (3) site border. STATION is installed in the control rooms to provide the operators with information on radioactivity, radiation interlocks, radiation alarms, etc. and it transmits those informations to CENTER. CENTER is installed in the radiation administration room to show in real-time the data from SARMs and STATIONs. It also holds the two-years data on disks for analysis of radiation fields and documentation. NORM started to operate in 1980, and is now extended to have eight STATIONs and 200 SARMs. (J.P.N.)

  5. Physical Research Laboratory radiocarbon 14C dates : CS-I

    International Nuclear Information System (INIS)

    Agrawal, D.P.; Krishnamurthy, R.V.; Kusumgar, Sheela; Pant, R.K.

    1978-01-01

    The 14 C dates of archaeological samples measured at the Radiocarbon Laboratory of the Physical Research Laboratory, Ahmedabad are presented. Samples were converted into methane and measured in gas proportional counters. Ninety-five percent activity of NBS oxalic acid was used as modern standard. The dates in years B.P. are given for each sample based on the half-life values of 5568 +- 30 years and 5730 +- 40 years, the latter within parenthesis. The dates are not calibrated for 14 C/ 12 C variations. To convert the dates into AD/BC scale, 1950 AD should be used as reference year. A number of 14 C dates (PRL-81, -83, -67, -68) now confirm that the Painted Grey Ware culture extended upto the 3rd century BC. Some of the dates from Barkhera (PRL-113), Bateshwar (PRL-200), Bhimbetka (PRL-17) and Koldihawa (PRL-100, 101) are older than normally expected, probably indicative of some hitherto unknown basal cultures in these regions. 14 C dates on in situ Megalithic materials do not seem to go beyond 200 BC. (author)

  6. Radiation monitors in national laboratory for high energy physics (NORM)

    Energy Technology Data Exchange (ETDEWEB)

    Miyajima, Mitsuhiro (National Lab. for High Energy Physics, Tsukuba, Ibaraki (Japan))

    1991-08-01

    In National Laboratory for High Energy Physics, in order to monitor these fields of radiation and radioactivity, the network of radiation monitors (NORM) is in operation. This continuous, centralized radiation monitoring system was designed and manufactured for the condition of adapting to the change and expansion of laboratories, accelerators and attached facilities. The NORM is composed of SARM, STATION and CENTER having different roles and functions, respectively. Those three components and their design are reported. Stand Alone Radiation Monitors (SARM) are installed at (1) controlled area of frequent entrance, (2) border area between controlled and non-controlled areas and (3) site border. STATION is installed in the control rooms to provide the operators with information on radioactivity, radiation interlocks, radiation alarms, etc. and it transmits those informations to CENTER. CENTER is installed in the radiation administration room to show in real-time the data from SARMs and STATIONs. It also holds the two-years data on disks for analysis of radiation fields and documentation. NORM started to operate in 1980, and is now extended to have eight STATIONs and 200 SARMs. (J.P.N.).

  7. New Outreach Initiatives at the Princeton Plasma Physics Laboratory

    Science.gov (United States)

    Zwicker, Andrew; Dominguez, Arturo; Greco, Shannon; Ortiz, Deedee; Delooper, John

    2015-11-01

    In FY15, PPPL concentrated its efforts on a portfolio of outreach activities centered around plasma science and fusion energy that have the potential to reach a large audience and have a significant and measurable impact. The overall goal of these outreach activities is to expose the public (within New Jersey, the US and the world) to the Department of Energy's scientific endeavors and specifically to PPPL's research regarding fusion and plasma science. The projects include several new activities along with upgrades to existing ones. The new activities include the development of outreach demos for the plasma physics community and the upgrade of the Internet Plasma Physics Experience (IPPEX). Our first plasma demo is a low cost DC glow discharge, suitable for tours as well as for student laboratories (plasma breakdown, spectroscopy, probes). This has been field tested in a variety of classes and events. The upgrade to the IPPEX web site includes a new template and a new interactive virtual tokamak. Future work on IPPEX will provide users limited access to data from NSTX-U. Finally, our Young Women's Conference was expanded and improved. These and other new outreach activities will be presented.

  8. The uncertainty in physical measurements an introduction to data analysis in the physics laboratory

    CERN Document Server

    Fornasini, Paolo

    2008-01-01

    All measurements of physical quantities are affected by uncertainty. Understanding the origin of uncertainty, evaluating its extent and suitably taking it into account in data analysis is essential for assessing the degree of accuracy of phenomenological relationships and physical laws in both scientific research and technological applications. The Uncertainty in Physical Measurements: An Introduction to Data Analysis in the Physics Laboratory presents an introduction to uncertainty and to some of the most common procedures of data analysis. This book will serve the reader well by filling the gap between tutorial textbooks and highly specialized monographs. The book is divided into three parts. The first part is a phenomenological introduction to measurement and uncertainty: properties of instruments, different causes and corresponding expressions of uncertainty, histograms and distributions, and unified expression of uncertainty. The second part contains an introduction to probability theory, random variable...

  9. PHYSICAL PROPERTY MEASUREMENTS OF LABORATORY PREPARED SALTSTONE GROUT

    Energy Technology Data Exchange (ETDEWEB)

    Hansen, E.; Cozzi, A.; Edwards, T.

    2014-05-05

    The Saltstone Production Facility (SPF) built two new Saltstone Disposal Units (SDU), SDU 3 and SDU 5, in 2013. The variable frequency drive (VFD) for the grout transfer hose pump tripped due to high current demand by the motor during the initial radioactive saltstone transfer to SDU 5B on 12/5/2013. This was not observed during clean cap processing on July 5, 2013 to SDU 3A, which is a slightly longer distance from the SPF than is SDU 5B. Saltstone Design Authority (SDA) is evaluating the grout pump performance and capabilities to transfer the grout processed in SPF to SDU 3/5. To assist in this evaluation, grout physical properties are required. At this time, there are no rheological data from the actual SPF so the properties of laboratory prepared samples using simulated salt solution or Tank 50 salt solution will be measured. The physical properties of grout prepared in the laboratory with de-ionized water (DI) and salt solutions were obtained at 0.60 and 0.59 water to premix (W/P) ratios, respectively. The yield stress of the DI grout was greater than any salt grout. The plastic viscosity of the DI grout was lower than all of the salt grouts (including salt grout with admixture). When these physical data were used to determine the pressure drop and fluid horsepower for steady state conditions, the salt grouts without admixture addition required a higher pressure drop and higher fluid horsepower to transport. When 0.00076 g Daratard 17/g premix was added, both the pressure drop and fluid horsepower were below that of the DI grout. Higher concentrations of Daratard 17 further reduced the pressure drop and fluid horsepower. The uncertainty in the single point Bingham Plastic parameters is + 4% of the reported values and is the bounding uncertainty. Two different mechanical agitator mixing protocols were followed for the simulant salt grout, one having a total mixing time of three minutes and the other having a time of 10 minutes. The Bingham Plastic parameters

  10. Introduction to Plasma Physics: With Space and Laboratory Applications

    International Nuclear Information System (INIS)

    Browning, P K

    2005-01-01

    A new textbook on plasma physics must be very welcome, as this will encourage the teaching of courses on the subject. This book is written by two experts in their fields, and is aimed at advanced undergraduate and postgraduate courses. There are of course many other plasma physics textbooks available. The niche which this particular book fills is really defined by its subtitle: that is, 'with space and laboratory applications'. This differs from most other books which tend to emphasise either space or fusion applications (but not both) or to concentrate only on general theory. Essentially, the emphasis here is on fundamental plasma physics theory, but applications are given from time to time. For example, after developing Alfven wave theory, observations of Alfven waves in the solar wind and in the Jovian magnetosphere are presented; whilst ion acoustic cylcotron waves are illustrated by data from a laboratory Q machine. It is fair to say that examples from space seem to predominate. Nevertheless, the approach of including a broad range of applications is very good from an educational point of view, and this should help to train a generation of students with a grasp of fundamental plasma physics who can work in a variety of research fields. The subject coverage of the book is fairly conventional and there are no great surprises. It begins, inevitably, with a discussion of plasma parameters (Debye length etc) and of single particle motions. Both kinetic theory and magnetohydrodynamics are introduced. Waves are quite extensively discussed in several chapters, including both cold and hot plasmas, magnetised and unmagnetised. Nonlinear effects - a large subject! - are briefly discussed. A final chapter deals with collisions in fully ionised plasmas. The choice of contents of a textbook is always something of a matter of personal choice. It is easy to complain about what has been left out, and everyone has their own favourite topics. With that caveat, I would question

  11. The Chemistry and Physics of Molecular Surfaces

    Science.gov (United States)

    Kaldor, A.; Cox, D. M.; Trevor, D. J.; Zakin, M. R.

    1986-06-01

    This article reviews the results of several recent experiments performed in our laboratory designed to elucidate the fundamental chemical and physical properties of clusters of both transition metals and other refractory elements containing from one to several hundred atoms. The gas-phase reactivity of clusters towards a variety of reagents is explored using a fast-flow reactor system. Strong cluster size-dependent variations in reactivity are observed, especially for the case of hydrogen chemisorption. Measurement of cluster photoionization thresholds (IPs) provides a sensitive probe of the evolution of cluster electronic structure as a function of the number of constituent atoms. Cluster ionization potentials are observed to exhibit fluctuations about the smooth global falloff predicted by the classical drop model, indicating the non-bulk-like behavior of small clusters. Measurement of shifts in IP induced by chemisorption of different reagents provides insight into the nature of adsorbate-cluster bonding. The formation and properties of bare and metal-doped carbon clusters are explored, with particular emphasis on elucidating the photophysics and photochemistry of the postulated ultrastable larger clusters. The results suggest that further work is required to prove soccer ball-like structures for C50, C60, etc. Finally, infrared multiple-photon dissociation (IR-MPD) is demonstrated to be a viable technique for obtaining infrared spectra of absorbate-cluster complexes. This technique is an important new tool for obtaining information about the molecularity of gas-phase reactions beyond that currently available from mass spectrometric analysis. As an illustration of the method, IR-MPD spectra of methanol chemisorbed on small iron clusters are obtained.

  12. Annual report of the Nuclear Physics Laboratory, University of Washington

    Energy Technology Data Exchange (ETDEWEB)

    Snover, K.; Fulton, B. [eds.

    1996-04-01

    The Nuclear Physics Laboratory of the University of Washington has for over 40 years supported a broad program of experimental physics research. Some highlights of the research activities during the past year are given. Work continues at a rapid pace toward completion of the Sudbury Neutrino Observatory in January 1997. Following four years of planning and development, installation of the acrylic vessel began last July and is now 50% complete, with final completion scheduled for September. The Russian-American Gallium Experiment (SAGE) has completed a successful {sup 51}Cr neutrino source experiment. The first data from {sup 8}B decay have been taken in the Mass-8 CVC/Second Class Current study. The analysis of the measured barrier distributions for Ca-induced fission of prolate {sup 192}Os and oblate {sup 194}Pt has been completed. In a collaboration with a group from the Bhabha Atomic Research Centre they have shown that fission anisotropies at energies well above the barrier are not influenced by the mass asymmetry of the entrance channel relative to the Businaro-Gallone critical asymmetry. They also have preliminary evidence at higher bombarding energy that noncompound nucleus fission scales with the mean square angular momentum, in contrast to previous suggestions. The authors have measured proton and alpha particle emission spectra from the decay of A {approximately} 200 compound nuclei at excitation energies of 50--100 MeV, and used these measurements to infer the nuclear temperature. The investigations of multiparticle Bose-Einstein interferometry have led to a new algorithm for putting Bose-Einstein and Coulomb correlations of up to 6th order into Monte Carlo simulations of ultra-relativistic collision events, and to a new fast algorithm for extracting event temperatures.

  13. Annual report of the Nuclear Physics Laboratory, University of Washington

    International Nuclear Information System (INIS)

    Snover, K.; Fulton, B.

    1996-04-01

    The Nuclear Physics Laboratory of the University of Washington has for over 40 years supported a broad program of experimental physics research. Some highlights of the research activities during the past year are given. Work continues at a rapid pace toward completion of the Sudbury Neutrino Observatory in January 1997. Following four years of planning and development, installation of the acrylic vessel began last July and is now 50% complete, with final completion scheduled for September. The Russian-American Gallium Experiment (SAGE) has completed a successful 51 Cr neutrino source experiment. The first data from 8 B decay have been taken in the Mass-8 CVC/Second Class Current study. The analysis of the measured barrier distributions for Ca-induced fission of prolate 192 Os and oblate 194 Pt has been completed. In a collaboration with a group from the Bhabha Atomic Research Centre they have shown that fission anisotropies at energies well above the barrier are not influenced by the mass asymmetry of the entrance channel relative to the Businaro-Gallone critical asymmetry. They also have preliminary evidence at higher bombarding energy that noncompound nucleus fission scales with the mean square angular momentum, in contrast to previous suggestions. The authors have measured proton and alpha particle emission spectra from the decay of A ∼ 200 compound nuclei at excitation energies of 50--100 MeV, and used these measurements to infer the nuclear temperature. The investigations of multiparticle Bose-Einstein interferometry have led to a new algorithm for putting Bose-Einstein and Coulomb correlations of up to 6th order into Monte Carlo simulations of ultra-relativistic collision events, and to a new fast algorithm for extracting event temperatures

  14. Shock and Detonation Physics at Los Alamos National Laboratory

    Energy Technology Data Exchange (ETDEWEB)

    Robbins, David L [Los Alamos National Laboratory; Dattelbaum, Dana M [Los Alamos National Laboratory; Sheffield, Steve A [Los Alamos National Laboratory

    2012-08-22

    WX-9 serves the Laboratory and the Nation by delivering quality technical results, serving customers that include the Nuclear Weapons Program (DOE/NNSA), the Department of Defense, the Department of Homeland Security and other government agencies. The scientific expertise of the group encompasses equations-of-state, shock compression science, phase transformations, detonation physics including explosives initiation, detonation propagation, and reaction rates, spectroscopic methods and velocimetry, and detonation and equation-of-state theory. We are also internationally-recognized in ultra-fast laser shock methods and associated diagnostics, and are active in the area of ultra-sensitive explosives detection. The facility capital enabling the group to fulfill its missions include a number of laser systems, both for laser-driven shocks, and spectroscopic analysis, high pressure gas-driven guns and powder guns for high velocity plate impact experiments, explosively-driven techniques, static high pressure devices including diamond anvil cells and dilatometers coupled with spectroscopic probes, and machine shops and target fabrication facilities.

  15. Remote handling needs of the Princeton Plasma Physics Laboratory

    International Nuclear Information System (INIS)

    Smiltnieks, V.

    1982-07-01

    This report is the result of a Task Force study commissioned by the Canadian Fusion Fuels Technology Project (CFFTP) to investigate the remote handling requirements at the Princeton Plasma Physics Laboratory (PPPL) and identify specific areas where CFFTP could offer a contractual or collaborative participation, drawing on the Canadian industrial expertise in remote handling technology. The Task Force reviewed four areas related to remote handling requirements; the TFTR facility as a whole, the service equipment required for remote maintenance, the more complex in-vessel components, and the tritium systems. Remote maintenance requirements both inside the vacuum vessel and around the periphery of the machine were identified as the principal areas where Canadian resources could effectively provide an input, initially in requirement definition, concept evaluation and feasibility design, and subsequently in detailed design and manufacture. Support requirements were identified in such areas as the mock-up facility and a variety of planning studies relating to reliability, availability, and staff training. Specific tasks are described which provide an important data base to the facility's remote handling requirements. Canadian involvement in the areas is suggested where expertise exists and support for the remote handling work is warranted. Reliability, maintenance operations, inspection strategy and decommissioning are suggested for study. Several specific components are singled out as needing development

  16. Mapping Soil Surface Macropores Using Infrared Thermography: An Exploratory Laboratory Study

    Science.gov (United States)

    de Lima, João L. M. P.; Abrantes, João R. C. B.; Silva, Valdemir P.; de Lima, M. Isabel P.; Montenegro, Abelardo A. A.

    2014-01-01

    Macropores and water flow in soils and substrates are complex and are related to topics like preferential flow, nonequilibrium flow, and dual-continuum. Hence, the quantification of the number of macropores and the determination of their geometry are expected to provide a better understanding on the effects of pores on the soil's physical and hydraulic properties. This exploratory study aimed at evaluating the potential of using infrared thermography for mapping macroporosity at the soil surface and estimating the number and size of such macropores. The presented technique was applied to a small scale study (laboratory soil flume). PMID:25371915

  17. Mapping soil surface macropores using infrared thermography: an exploratory laboratory study.

    Science.gov (United States)

    de Lima, João L M P; Abrantes, João R C B; Silva, Valdemir P; de Lima, M Isabel P; Montenegro, Abelardo A A

    2014-01-01

    Macropores and water flow in soils and substrates are complex and are related to topics like preferential flow, nonequilibrium flow, and dual-continuum. Hence, the quantification of the number of macropores and the determination of their geometry are expected to provide a better understanding on the effects of pores on the soil's physical and hydraulic properties. This exploratory study aimed at evaluating the potential of using infrared thermography for mapping macroporosity at the soil surface and estimating the number and size of such macropores. The presented technique was applied to a small scale study (laboratory soil flume).

  18. Laboratory Reference Spectroscopy of Icy Satellite Candidate Surface Materials (Invited)

    Science.gov (United States)

    Dalton, J. B.; Jamieson, C. S.; Shirley, J. H.; Pitman, K. M.; Kariya, M.; Crandall, P.

    2013-12-01

    The bulk of our knowledge of icy satellite composition continues to be derived from ultraviolet, visible and infrared remote sensing observations. Interpretation of remote sensing observations relies on availability of laboratory reference spectra of candidate surface materials. These are compared directly to observations, or incorporated into models to generate synthetic spectra representing mixtures of the candidate materials. Spectral measurements for the study of icy satellites must be taken under appropriate conditions (cf. Dalton, 2010; also http://mos.seti.org/icyworldspectra.html for a database of compounds) of temperature (typically 50 to 150 K), pressure (from 10-9 to 10-3 Torr), viewing geometry, (i.e., reflectance), and optical depth (must manifest near infrared bands but avoid saturation in the mid-infrared fundamentals). The Planetary Ice Characterization Laboratory (PICL) is being developed at JPL to provide robust reference spectra for icy satellite surface materials. These include sulfate hydrates, hydrated and hydroxylated minerals, and both organic and inorganic volatile ices. Spectral measurements are performed using an Analytical Spectral Devices FR3 portable grating spectrometer from .35 to 2.5 microns, and a Thermo-Nicolet 6500 Fourier-Transform InfraRed (FTIR) spectrometer from 1.25 to 20 microns. These are interfaced with the Basic Extraterrestrial Environment Simulation Testbed (BEEST), a vacuum chamber capable of pressures below 10-9 Torr with a closed loop liquid helium cryostat with custom heating element capable of temperatures from 30-800 Kelvins. To generate optical constants (real and imaginary index of refraction) for use in nonlinear mixing models (i.e., Hapke, 1981 and Shkuratov, 1999), samples are ground and sieved to six different size fractions or deposited at varying rates to provide a range of grain sizes for optical constants calculations based on subtractive Kramers-Kronig combined with Hapke forward modeling (Dalton and

  19. Oral Anatomy Laboratory Examinations in a Physical Therapy Program

    Science.gov (United States)

    Fabrizio, Philip A.

    2013-01-01

    The process of creating and administering traditional tagged anatomy laboratory examinations is time consuming for instructors and limits laboratory access for students. Depending on class size and the number of class, sections, creating, administering, and breaking down a tagged laboratory examination may involve one to two eight-hour days.…

  20. World's particle physics laboratories join to create new communication resource

    CERN Multimedia

    2003-01-01

    "The worldwide particle physics community today (August 12) launched Interactions.org, a new global, Web-based resource developed to provide news, high-quality imagery, video and other tools for communicating the science of particle physics" (1 page).

  1. Virtual Physics Laboratory Application Based on the Android Smartphone to Improve Learning Independence and Conceptual Understanding

    Science.gov (United States)

    Arista, Fitra Suci; Kuswanto, Heru

    2018-01-01

    The research study concerned here was to: (1) produce a virtual physics laboratory application to be called ViPhyLab by using the Android smartphone as basis; (2) determine the appropriateness and quality of the virtual physics laboratory application that had been developed; and (3) describe the improvement in learning independence and conceptual…

  2. Developing Technical Writing Skills in the Physical Chemistry Laboratory: A Progressive Approach Employing Peer Review

    Science.gov (United States)

    Gragson, Derek E.; Hagen, John P.

    2010-01-01

    Writing formal "journal-style" lab reports is often one of the requirements chemistry and biochemistry students encounter in the physical chemistry laboratory. Helping students improve their technical writing skills is the primary reason this type of writing is a requirement in the physical chemistry laboratory. Developing these skills is an…

  3. Clermont-Ferrand Corpuscular Physics Laboratory - LPCCF. Activity report June 2003-December 2005

    International Nuclear Information System (INIS)

    2006-01-01

    The Clermont-Ferrand Corpuscular Physics Laboratory is a joint research unit of the Blaise Pascal University and the National Centre for Scientific Research (CNRS) which belongs to the French National Institute of Nuclear and particle physics (IN2P3). The main research topic, 'Particle physics' and 'Hadronic matter', represents about 3/4 of the laboratory activities and are carried out in the framework of big international cooperations. Other activities of LPCCF are pluri-disciplinary and are related to nuclear physics applications, like isotope dating, low radioactivities, low-dose biological radiation effects, biomaterials, medical imaging etc.. This report presents the activities of the laboratory from June 2003 to December 2005: 1 - Forewords; 2 - Theoretical physics; 3 - Particle physics; 4 - Hadronic matter; 5 - Interdisciplinary research; 6 - Technical and administrative services; 7 - Laboratory organisation and means; 8 - Teaching activity; 9 - Communication; 10 - Regional policy and valorisation; 11 - Scientific production

  4. Clermont-Ferrand Corpuscular Physics Laboratory - LPCCF. Activity report January 2006-December 2007

    International Nuclear Information System (INIS)

    2008-01-01

    The Clermont-Ferrand Corpuscular Physics Laboratory is a joint research unit of the Blaise Pascal University and the National Centre for Scientific Research (CNRS) which belongs to the French National Institute of Nuclear and particle physics (IN2P3). The main research topic, 'Particle physics' and 'Hadronic matter', represents about 3/4 of the laboratory activities and are carried out in the framework of big international cooperations. Other activities of LPCCF are pluri-disciplinary and are related to nuclear physics applications, like isotope dating, low radioactivities, low-dose biological radiation effects, biomaterials, medical imaging etc.. This report presents the activities of the laboratory from January 2006 to December 2007: 1 - Forewords; 2 - Theoretical physics; 3 - Particle physics; 4 - Hadronic matter; 5 - Interdisciplinary research; 6 - Technical and administrative services; 7 - Laboratory organisation and means; 8 - Teaching activity; 9 - Communication; 10 - Regional policy and valorisation; 11 - Scientific production 12 - Staff

  5. Earth System Research Laboratory Long-Term Surface Aerosol Measurements

    Data.gov (United States)

    National Oceanic and Atmospheric Administration, Department of Commerce — Aerosol measurements began at the NOAA Earth System Research Laboratory (ESRL) Global Monitoring Division (GMD) baseline observatories in the mid-1970's with the...

  6. Composition and physical properties of Enceladus' surface

    Science.gov (United States)

    Brown, R.H.; Clark, R.N.; Buratti, B.J.; Cruikshank, D.P.; Barnes, J.W.; Mastrapa, R.M.E.; Bauer, J.; Newman, S.; Momary, T.; Baines, K.H.; Bellucci, G.; Capaccioni, F.; Cerroni, P.; Combes, M.; Coradini, A.; Drossart, P.; Formisano, V.; Jaumann, R.; Langavin, Y.; Matson, D.L.; McCord, T.B.; Nelson, R.M.; Nicholson, P.D.; Sicardy, B.; Sotin, Christophe

    2006-01-01

    Observations of Saturn's satellite Enceladus using Cassini's Visual and Infrared Mapping Spectrometer instrument were obtained during three flybys of Enceladus in 2005. Enceladus' surface is composed mostly of nearly pure water ice except near its south pole, where there are light organics, CO2, and amorphous and crystalline water ice, particularly in the region dubbed the "tiger stripes." An upper limit of 5 precipitable nanometers is derived for CO in the atmospheric column above Enceladus, and 2% for NH 3 in global surface deposits. Upper limits of 140 kelvin (for a filled pixel) are derived for the temperatures in the tiger stripes.

  7. Manganese phospate physical chemistry and surface properties

    International Nuclear Information System (INIS)

    Najera R, N.; Romero G, E. T.

    2008-01-01

    This paper presents the methodology for the manganese phosphate (III) synthesis (MnP0 4 H 2 0) from manganese chloride. The physicochemical characterization was carried out by: X-ray diffraction, scanning electron microscopy, infrared analysis and thermal gravimetric analysis. The surface characterization is obtained through the determination of surface area, point of zero charge and kinetics of moisture. As a phosphate compound of a metal with low oxidation state is a promising compound for removal pollutants from water and soil, can be used for the potential construction of containment barriers for radioactive wastes. (Author)

  8. Cloud physics laboratory project science and applications working group

    Science.gov (United States)

    Hung, R. J.

    1977-01-01

    The conditions of the expansion chamber under zero gravity environment were simulated. The following three branches of fluid mechanics simulation under low gravity environment were accomplished: (1) oscillation of the water droplet which characterizes the nuclear oscillation in nuclear physics, bubble oscillation of two phase flow in chemical engineering, and water drop oscillation in meteorology; (2) rotation of the droplet which characterizes nuclear fission in nuclear physics, formation of binary stars and rotating stars in astrophysics, and breakup of the water droplet in meteorology; and (3) collision and coalescence of the water droplets which characterizes nuclear fusion in nuclear physics and processes of rain formation in meteorology.

  9. Riemann Surfaces: Vector Bundles, Physics, and Dynamics

    DEFF Research Database (Denmark)

    Sikander, Shehryar

    We construct quantum representation of a subgroup of the mapping class group of a genus two surface. Our construction relies on realizing this subgroup as the orbifold fundamental group of a Teichmueller curve, pulling back the Hitchin connection to this Tecihmueller curve, and computing the mono...

  10. Physical parameter optimization by Response Surface Methodology ...

    African Journals Online (AJOL)

    Response Surface Methodology (RSM) is an empirical technique involving the use of Design Expert software to derive a predictive model similar to regression analysis. This present study explains the significant application of RSM in optimization of lipase production by Aspergillus niger. The experimental validation of the ...

  11. TEACHING PHYSICS: Demonstrating cosmic ray induced electromagnetic cascades in the A-level laboratory

    Science.gov (United States)

    Dunne, Peter

    1999-01-01

    This article indicates how the study of sea-level cosmic ray phenomena can have a role in A-level physics. It describes a simple but far reaching particle physics experiment that can be carried out in the A-level physics laboratory. A simple model of electron-positron-photon cascades, suitable for use at A-level, is described.

  12. The Perceptions, Views and Opinions of University Students about Physics Learning during Undergraduate Laboratory Work

    Science.gov (United States)

    Hanif, M.; Sneddon, P. H.; Al-Ahmadi, F. M.; Reid, N.

    2009-01-01

    The physics laboratory has long been a distinctive feature of physics education. It has been given a central role in the teaching and learning of physics at school and undergraduate levels in universities. The literature indicates that science educators have suggested that there are academically rich benefits in the learning and understanding of…

  13. Similarity and self-similarity in high energy density physics: application to laboratory astrophysics

    International Nuclear Information System (INIS)

    Falize, E.

    2008-10-01

    The spectacular recent development of powerful facilities allows the astrophysical community to explore, in laboratory, astrophysical phenomena where radiation and matter are strongly coupled. The titles of the nine chapters of the thesis are: from high energy density physics to laboratory astrophysics; Lie groups, invariance and self-similarity; scaling laws and similarity properties in High-Energy-Density physics; the Burgan-Feix-Munier transformation; dynamics of polytropic gases; stationary radiating shocks and the POLAR project; structure, dynamics and stability of optically thin fluids; from young star jets to laboratory jets; modelling and experiences for laboratory jets

  14. An Overview of the Computational Physics and Methods Group at Los Alamos National Laboratory

    Energy Technology Data Exchange (ETDEWEB)

    Baker, Randal Scott [Los Alamos National Lab. (LANL), Los Alamos, NM (United States)

    2018-02-22

    CCS Division was formed to strengthen the visibility and impact of computer science and computational physics research on strategic directions for the Laboratory. Both computer science and computational science are now central to scientific discovery and innovation. They have become indispensable tools for all other scientific missions at the Laboratory. CCS Division forms a bridge between external partners and Laboratory programs, bringing new ideas and technologies to bear on today’s important problems and attracting high-quality technical staff members to the Laboratory. The Computational Physics and Methods Group CCS-2 conducts methods research and develops scientific software aimed at the latest and emerging HPC systems.

  15. Effect of Availability and Utilization of Physics Laboratory Equipment on Students' Academic Achievement in Senior Secondary School Physics

    Science.gov (United States)

    Olufunke, Bello Theodora

    2012-01-01

    The study determined the available Physics Laboratory Equipment (PLE) for the teaching and learning of physics in senior secondary schools in Nigeria as well as the extent of utilizing the available equipment. The research design adopted for the study was descriptive survey. The sample consisted of nine hundred students who were randomly chosen…

  16. Evaluation of Surface Runoff Generation Processes Using a Rainfall Simulator: A Small Scale Laboratory Experiment

    Science.gov (United States)

    Danáčová, Michaela; Valent, Peter; Výleta, Roman

    2017-12-01

    Nowadays, rainfall simulators are being used by many researchers in field or laboratory experiments. The main objective of most of these experiments is to better understand the underlying runoff generation processes, and to use the results in the process of calibration and validation of hydrological models. Many research groups have assembled their own rainfall simulators, which comply with their understanding of rainfall processes, and the requirements of their experiments. Most often, the existing rainfall simulators differ mainly in the size of the irrigated area, and the way they generate rain drops. They can be characterized by the accuracy, with which they produce a rainfall of a given intensity, the size of the irrigated area, and the rain drop generating mechanism. Rainfall simulation experiments can provide valuable information about the genesis of surface runoff, infiltration of water into soil and rainfall erodibility. Apart from the impact of physical properties of soil, its moisture and compaction on the generation of surface runoff and the amount of eroded particles, some studies also investigate the impact of vegetation cover of the whole area of interest. In this study, the rainfall simulator was used to simulate the impact of the slope gradient of the irrigated area on the amount of generated runoff and sediment yield. In order to eliminate the impact of external factors and to improve the reproducibility of the initial conditions, the experiments were conducted in laboratory conditions. The laboratory experiments were carried out using a commercial rainfall simulator, which was connected to an external peristaltic pump. The pump maintained a constant and adjustable inflow of water, which enabled to overcome the maximum volume of simulated precipitation of 2.3 l, given by the construction of the rainfall simulator, while maintaining constant characteristics of the simulated precipitation. In this study a 12-minute rainfall with a constant intensity

  17. Laboratory insights into the detection of surface biosignatures by remote-sensing techniques

    Science.gov (United States)

    Poch, O.; Pommerol, A.; Jost, B.; Roditi, I.; Frey, J.; Thomas, N.

    2014-03-01

    With the progress of direct imaging techniques, it will be possible in the short or long-term future to retrieve more efficiently the information on the physical properties of the light reflected by rocky exoplanets (Traub et al., 2010). The search for visible-infrared absorption bands of peculiar gases (O2, CH4 etc.) in this light could give clues for the presence of life (Kaltenegger and Selsis, 2007). Even more uplifting would be the direct detection of life itself, on the surface of an exoplanet. Considering this latter possibility, what is the potential of optical remote-sensing methods to detect surface biosignatures? Reflected light from the surface of the Earth exhibits a strong surface biosignature in the form of an abrupt change of reflectance between the visible and infrared range of the spectrum (Seager et al., 2005). This spectral feature called "vegetation red-edge" is possibly the consequence of biological evolution selecting the right chemical structures enabling the plants to absorb the visible energy, while preventing them from overheating by reflecting more efficiently the infrared. Such red-edge is also found in primitive photosynthetic bacteria, cyanobacteria, that colonized the surface of the Earth ocean and continents billions of years before multicellular plants (Knacke, 2003). If life ever arose on an Earth-like exoplanet, one could hypothesize that some form of its surface-life evolves into similar photo-active organisms, also exhibiting a red-edge. In this paper, we will present our plan and preliminary results of a laboratory study aiming at precising the potentiality of remote sensing techniques in detecting such surface biosignatures. Using equipment that has been developed in our team for surface photometry studies (Pommerol 2011, Jost 2013, Pommerol 2013), we will investigate the reflectance spectra and bidirectional reflectance function of soils containing bacteria such as cyanobacteria, in various environmental conditions. We will

  18. Three step double layers in the laboratory. [plasma physics

    Science.gov (United States)

    Bailey, Andrew, III; Hershkowitz, Noah

    1988-01-01

    A new class of stationary double layer structure, with three or more distinct steps, is demonstrated in the laboratory. A large monotonic potential increase results from a series of smaller double layers. In many respects, these double layer structures resemble those inferred from satellite measurements of auroral double layers. This new class of double layer appears to depend on turbulence for its existence and to be a hybrid structure, intermediate between anomalous resistivity and BGK double layers.

  19. The surface physics work station: final design

    International Nuclear Information System (INIS)

    Landers, R.; Kleiman, G.G.; Castro, S.G.C. de; Douglas, R.A.; Nascente, P.A.P.

    1996-01-01

    Thanks to funding from FAPESP we will be installing in the beginning of 1997 a work station for electron spectroscopy designed for the study of clean solid surfaces and the modification of these surfaces by deposition in situ of ultra thin metallic films. The main analytical tool will be a high resolution hemispherical analyzer made by VSW-Omicrom (EA 125 HR) which is capable of better than 5 meV resolution and high transmission due to its five channeltron multi detection system. The system will also have a Rear View LEED Optics for single crystal studies. The system will be housed in a 16'' cylindrical chamber with mu metal magnetic shielding having two levels for analysis. The upper level will contain instruments for technique which do not require photons such as LEED and sample cleaning. The lower level will have the electron analyzer, conventional X-ray source (Al/Mg), electron gun for Auger, e-beam evaporators for thin film deposition and ports for the future addition of different detectors. We will have a manipulator with 5 degrees of freedom (thre translation and two rotational) and sample heating and LN cooling. Finally we will have a fast entry/preparation chamber. The pumping system will have a combination of turbomolecular and ion pumps for the main chamber and a turbo for the fast entr/prep chamber. The system will be used initially for the study of surface alloys by XPS and Photoelectron Diffraction but as soon as it is properly characterized it will be open for collaborations with other groups interested in using its capabilities. (author)

  20. Quality of Undergraduate Physics Students' Written Scientific Arguments: How to Promote Students' Appropriation of Scientific Discourse in Physics Laboratory Reports?

    Science.gov (United States)

    Aydeniz, Mehmet; Yeter-Aydeniz, Kubra

    2015-03-01

    In this study we challenged 18 undergraduate physics students to develop four written scientific arguments across four physics labs: 1) gravity-driven acceleration, 2) conservation of mechanical energy, 3) conservation of linear momentum and 4) boyle's law, in a mechanics and thermodynamics laboratory course. We evaluated quality of the written scientific arguments developed by the participants using the Claim, Evidence, Reasoning and Rebuttal (CERR) rubric. The results indicate that while students developed adequate scientific explanations that summarized the findings of their experiments, they experienced unique difficulties in using a persuasive and critical discourse in their written arguments. Students experienced the most difficulty in considering alternative explanations in formulating their written scientific arguments. We elaborate on the implications of these findings for teaching physics laboratories and assessing students' learning in physics laboratories. We especially focus on the importance of framing in helping students to appropriate the epistemic norms of science in writing scientific arguments.

  1. Nuclear Physics Laboratory annual report, University of Washington April 1992

    International Nuclear Information System (INIS)

    1992-01-01

    This report contains short discusses on topics in the following areas: astrophysics; giant resonances and photonuclear reactions; nucleus-nucleus reactions; fundamental symmetries; accelerator mass spectrometry; medium energy nuclear physics; ultra-relativistic heavy ion collisions; cluster fusion; instrumentation; van de graaff accelerators and ion sources; and computer data acquisition systems

  2. What Do We Expect From Students' Physics Laboratory Experiments?

    Science.gov (United States)

    Trumper, Ricardo

    2002-01-01

    Explains that thinking like a physicist involves an understanding of the scientific methods of inquiry and the ability to use these methods in investigations. Describes two simple experiments in which high school and college students measure physical constants and make an easy analysis of their experimental data by applying the tools offered by…

  3. Nuclear Physics Laboratory annual report, University of Washington April 1992

    Energy Technology Data Exchange (ETDEWEB)

    1992-07-01

    This report contains short discusses on topics in the following areas: astrophysics; giant resonances and photonuclear reactions; nucleus-nucleus reactions; fundamental symmetries; accelerator mass spectrometry; medium energy nuclear physics; ultra-relativistic heavy ion collisions; cluster fusion; instrumentation; van de graaff accelerators and ion sources; and computer data acquisition systems. (LSP)

  4. Nuclear Physics Laboratory annual report, University of Washington April 1992

    Energy Technology Data Exchange (ETDEWEB)

    Cramer, John G.; Ramirez, Maria G.

    1992-01-01

    This report contains short discusses on topics in the following areas: astrophysics; giant resonances and photonuclear reactions; nucleus-nucleus reactions; fundamental symmetries; accelerator mass spectrometry; medium energy nuclear physics; ultra-relativistic heavy ion collisions; cluster fusion; instrumentation; van de graaff accelerators and ion sources; and computer data acquisition systems. (LSP)

  5. UV Radiation: a new first year physics/life sciences laboratory experiment

    Science.gov (United States)

    Petelina, S. V.; Siddaway, J. M.

    2010-12-01

    Unfortunately, Australia leads the world in the number of skin cancer cases per capita. Three major factors that contribute to this are: 1) the level of damaging ultraviolet (UV) radiation in Australia is higher than in many other countries. This is caused, among other factors, by the stratospheric ozone depletion and Antarctic ozone hole; 2) many people in Australia are of Irish-Scottish origin and their skin can not repair the damage caused by the UV radiation as effectively as the skin of people of other origins; 3) Australia is one of the world’s leaders in the outdoor activities where people tend to spend more time outside. As our experience has shown, most Australian University students, high school students, and even high school teachers were largely unaware of the UV damage details and effective safety measures. Therefore, a need for new ways to educate people became apparent. The general aim of this new 1st year laboratory experiment, developed and first offered at La Trobe University (Melbourne, Australia) in 2009, is to investigate how UV-B radiation levels change under various solar illumination conditions and how effective different types of protection are. After pre-lab readings on physical concepts and biological effects of UV radiation, and after solving all pre-lab problems, the students go outside and measure the actual change in UV-B and UV-A radiation levels under various conditions. Some of these conditions are: direct sun, shade from a building, shade under the roof, reflection from various surfaces, direct sun through cheap and expensive sunglasses and eyeglasses, direct sun through various types of cloth and hair. The equipment used is the UV-Probe manufactured by sglux SolGel Technologies GmbH. The students’ feedback on this new laboratory experiment was very positive. It was ranked top among all physics experiments offered as part of that subject (Physics for Life Sciences) in 2009 and top among all physics experiments presented for

  6. Zero-gravity atmospheric Cloud Physics Experiment Laboratory; Programmatics report

    Science.gov (United States)

    1974-01-01

    The programmatics effort included comprehensive analyses in four major areas: (1) work breakdown structure, (2) schedules, (3) costs, and (4) supporting research and technology. These analyses are discussed in detail in the following sections which identify and define the laboratory project development schedule, cost estimates, funding distributions and supporting research and technology requirements. All programmatics analyses are correlated among themselves and with the technical analyses by means of the work breakdown structure which serves as a common framework for program definition. In addition, the programmatic analyses reflect the results of analyses and plans for reliability, safety, test, and maintenance and refurbishment.

  7. Campus as a Living Laboratory for Sustainability: The Physics Connection

    Science.gov (United States)

    Lindstrom, Timothy; Middlecamp, Catherine

    2018-04-01

    One of us is a physicist. The other is a chemist. For the past four years, we have been teaching a large introductory environmental science course that uses our campus as a lens through which to explore issues relating to sustainability. Our students "ask questions about the energy we use to heat and cool our buildings, the food we eat, the air we breathe, the electricity to run light bulbs and appliances, the goods we purchase, and the waste we create." This course fits in the genre of using "campus as a living laboratory," a term we will discuss later.

  8. SASP '86: Symposium on atomic and surface physics

    International Nuclear Information System (INIS)

    Howorka, F.; Lindinger, W.; Maerk, T.D.

    1986-02-01

    71 papers are presented on subject matters indicated in the section headings: 1) Ion-neutral and neutral-neutral interactions in the gas phase; 2) Laser physics and photonics; 3) Electron collisions and electronic capture; 4) Ion-surface interaction and plasma-related effects; 5) Cluster physics. 70 thereof are of INIS interested and are treated separately. (G.Q.)

  9. Plasma Physics An Introduction to Laboratory, Space, and Fusion Plasmas

    CERN Document Server

    Piel, Alexander

    2010-01-01

    Plasma Physics gives a comprehensive introduction to the basic processes in plasmas and demonstrates that the same fundamental concepts describe cold gas-discharge plasmas, space plasmas, and hot fusion plasmas. Starting from particle drifts in magnetic fields, the principles of magnetic confinement fusion are explained and compared with laser fusion. Collective processes are discussed in terms of plasma waves and instabilities. The concepts of plasma description by magnetohydrodynamics, kinetic theory, and particle simulation are stepwise introduced. Space charge effects in sheath regions, double layers and plasma diodes are given the necessary attention. The new fundamental mechanisms of dusty plasmas are explored and integrated into the framework of conventional plasmas. The book concludes with a brief introduction to plasma discharges. Written by an internationally renowned researcher in experimental plasma physics, the text keeps the mathematical apparatus simple and emphasizes the underlying concepts. T...

  10. Assessing the Use of Smartphone in the University General Physics Laboratory

    Science.gov (United States)

    Shi, Wei-Zhao; Sun, Jiajun; Xu, Chong; Huan, Weiliang

    2016-01-01

    In this study, smartphone was used to alter the traditional procedure by involving students in active learning experiences prior to the laboratory meeting. The researcher surveyed students' view on the effect of using smartphone to enhance learning in the general physics laboratory. The use of smartphone was evaluated by having 120 students who…

  11. University Physics Students' Ideas of Thermal Radiation Expressed in Open Laboratory Activities Using Infrared Cameras

    Science.gov (United States)

    Haglund, Jesper; Melander, Emil; Weiszflog, Matthias; Andersson, Staffan

    2017-01-01

    Background: University physics students were engaged in open-ended thermodynamics laboratory activities with a focus on understanding a chosen phenomenon or the principle of laboratory apparatus, such as thermal radiation and a heat pump. Students had access to handheld infrared (IR) cameras for their investigations. Purpose: The purpose of the…

  12. Writing Material in Chemical Physics Research: The Laboratory Notebook as Locus of Technical and Textual Integration

    Science.gov (United States)

    Wickman, Chad

    2010-01-01

    This article, drawing on ethnographic study in a chemical physics research facility, explores how notebooks are used and produced in the conduct of laboratory science. Data include written field notes of laboratory activity; visual documentation of "in situ" writing processes; analysis of inscriptions, texts, and material artifacts produced in the…

  13. The Physics Multimedia Laboratory at Arkansas State University

    Science.gov (United States)

    Sustich, Andrew

    1997-11-01

    With the help of an NSF-ILI grant, we have revamped our introductory calculus-based sequence. The course now meets six hours per week entirely in the laboratory without traditional lectures. Multimedia computers together with MBL probes and software provide a hands-on interactive curriculum that actively engages students throughout the class period. An innovative web-based individualized homework service provides for a meaningful homework component to the course and gives students immediate feedback on their solutions. We discuss impementation of this new course and results from its first offering. We will also discuss some of the problems associated with faculty attitudes and plans for conversion of the algebra-based sequence to a similar format.

  14. Princeton Plasma Physics Laboratory Annual Site Environmental Report for Calendar Year 2001

    Energy Technology Data Exchange (ETDEWEB)

    Virginia L. Finley

    2004-04-07

    The purpose of this report is to provide the U.S. Department of Energy (DOE) and the public with information on the level of radioactive and nonradioactive pollutants (if any) that are added to the environment as a result of the Princeton Plasma Physics Laboratory's (PPPL) operations. The results of the 2001 environmental surveillance and monitoring program for PPPL are presented and discussed. The report also summarizes environmental initiatives, assessments, and programs that were undertaken in 2001. PPPL has engaged in fusion energy research since 1951. The vision of the Laboratory is to create innovations to make fusion power a practical reality--a clean, alternative energy source. The Year 2001 marked the third year of National Spherical Torus Experiment (NSTX) operations and Tokamak Fusion Test Reactor (TFTR) dismantlement and deconstruction activities. A collaboration among fourteen national laboratories, universities, and research institutions, the NSTX is a major element in the U.S. Fusion Energy Sciences Program. It has been designed to test the physics principles of spherical torus (ST) plasmas. The ST concept could play an important role in the development of smaller, more economical fusion reactors. In 2001, PPPL's radiological environmental monitoring program measured tritium in the air at on- and off-site sampling stations. PPPL is capable of detecting small changes in the ambient levels of tritium by using highly sensitive monitors. The operation of an in-stack monitor located on D-site is a requirement of the National Emission Standard for Hazardous Air Pollutants (NESHAPs) regulations; also included in PPPL's radiological environmental monitoring program, are water monitoring--precipitation, ground-, surface-, and waste-waters. PPPL's radiological monitoring program characterized the ambient, background levels of tritium in the environment and from the D-site stack; the data are presented in this report. Groundwater monitoring

  15. Princeton Plasma Physics Laboratory Annual Site Environmental Report for Calendar Year 2001

    International Nuclear Information System (INIS)

    Finley, Virginia L.

    2004-01-01

    The purpose of this report is to provide the U.S. Department of Energy (DOE) and the public with information on the level of radioactive and nonradioactive pollutants (if any) that are added to the environment as a result of the Princeton Plasma Physics Laboratory's (PPPL) operations. The results of the 2001 environmental surveillance and monitoring program for PPPL are presented and discussed. The report also summarizes environmental initiatives, assessments, and programs that were undertaken in 2001. PPPL has engaged in fusion energy research since 1951. The vision of the Laboratory is to create innovations to make fusion power a practical reality--a clean, alternative energy source. The Year 2001 marked the third year of National Spherical Torus Experiment (NSTX) operations and Tokamak Fusion Test Reactor (TFTR) dismantlement and deconstruction activities. A collaboration among fourteen national laboratories, universities, and research institutions, the NSTX is a major element in the U.S. Fusion Energy Sciences Program. It has been designed to test the physics principles of spherical torus (ST) plasmas. The ST concept could play an important role in the development of smaller, more economical fusion reactors. In 2001, PPPL's radiological environmental monitoring program measured tritium in the air at on- and off-site sampling stations. PPPL is capable of detecting small changes in the ambient levels of tritium by using highly sensitive monitors. The operation of an in-stack monitor located on D-site is a requirement of the National Emission Standard for Hazardous Air Pollutants (NESHAPs) regulations; also included in PPPL's radiological environmental monitoring program, are water monitoring--precipitation, ground-, surface-, and waste-waters. PPPL's radiological monitoring program characterized the ambient, background levels of tritium in the environment and from the D-site stack; the data are presented in this report. Groundwater monitoring continue d under a

  16. Princeton University Plasma Physics Laboratory, Princeton, New Jersey

    International Nuclear Information System (INIS)

    1991-01-01

    This report discusses the following topics: Principal parameters of experimental devices; Tokamak Fusion Test Reactor; Burning Plasma Experiment; Princeton Beta Experiment-Modification; Current Drive Experiment-Upgrade; International Thermonuclear Experimental Reactor; International Collaboration; X-Ray Laser Studies; Hyperthermal Atomic Beam Source; Pure Electron Plasma Experiments; Plasma Processing: Deposition and Etching of Thin Films; Theoretical Studies; Tokamak Modeling; Engineering Department; Environment, Safety, and Health and Quality Assurance; Technology Transfer; Office of Human Resources and Administration; PPPL Patent Invention Disclosures; Office of Resource Management; Graduate Education: Plasma Physics; Graduate Education: Program in Plasma Science and Technology; and Science Education Program

  17. Progress report 1986. Laboratory of high energy nuclear physics

    International Nuclear Information System (INIS)

    1987-01-01

    A study of hadron structure using neutrino interactions; high energy photon interactions; a search for gluinos; a spectrometer for the study of quark fusion and structure functions; measurement of the real part of the pp - scattering amplitude at 546 GeV; measurement of photon production in the fragmentation region of pp - interactions at 630 GeV; investigation of very high energy nucleus-nucleus interactions: the quagma; an experience on nucleon stability; as well as high energy nuclear physics research facilities are described [fr

  18. MULTIMEDIA VIRTUAL LABORATORY FOR PHYSICS IN THE DISTANCE LEARNING

    OpenAIRE

    H. M. Kravtsov; E.O. Kozlovskiy

    2014-01-01

    It’s presented the results of the software module "Virtual Lab" for distance learning system «Kherson Virtual University" (DLS KVU) applied to the problems of physics. Relevance of research due to the absence of existing DLS to support the creation and use of virtual labs in the disciplines of science cycle. The subject of this study is a software module to create and use virtual labs in distance learning system. The purpose of the study is a description of software technology of virtual labo...

  19. Princeton Plasma Physics Laboratory Annual Site Environmental Report for Calendar Year 2000

    Energy Technology Data Exchange (ETDEWEB)

    Virginia L. Finley

    2002-04-22

    The results of the 2000 environmental surveillance and monitoring program for the Princeton Plasma Physics Laboratory (PPPL) are presented and discussed. The purpose of this report is to provide the U.S. Department of Energy and the public with information on the level of radioactive and nonradioactive pollutants (if any) that are added to the environment as a result of PPPL's operations. The report also summarizes environmental initiatives, assessments, and programs that were undertaken in 2000. The Princeton Plasma Physics Laboratory has engaged in fusion energy research since 1951. The long-range goal of the U.S. Magnetic Fusion Energy Research Program is to create innovations to make fusion power a practical reality -- an alternative energy source. The year 2000 marked the second year of National Spherical Torus Experiment (NSTX) operations and Tokamak Fusion Test Reactor (TFTR) dismantlement and deconstruction activities. A collaboration among fourteen national laboratories, universities, and research institutions, the NSTX is a major element in the U.S. Fusion Energy Sciences Program. It has been designed to test the physics principles of spherical torus (ST) plasmas. The ST concept could play an important role in the development of smaller, more economical fusion power plants. With its completion within budget and ahead of its target schedule, NSTX first plasma occurred on February 12, 1999. In 2000, PPPL's radiological environmental monitoring program measured tritium in the air at on-site and off-site sampling stations. PPPL is capable of detecting small changes in the ambient levels of tritium by using highly sensitive monitors. The operation of an in-stack monitor located on D-site is a requirement of the National Emission Standard for Hazardous Air Pollutants (NESHAPs) regulations with limits set by the Environmental Protection Agency (EPA). Also included in PPPL's radiological environmental monitoring program, are precipitation, surface

  20. Princeton Plasma Physics Laboratory Annual Site Environmental Report for Calendar Year 2000

    International Nuclear Information System (INIS)

    Virginia L. Finley

    2002-04-01

    The results of the 2000 environmental surveillance and monitoring program for the Princeton Plasma Physics Laboratory (PPPL) are presented and discussed. The purpose of this report is to provide the U.S. Department of Energy and the public with information on the level of radioactive and nonradioactive pollutants (if any) that are added to the environment as a result of PPPL's operations. The report also summarizes environmental initiatives, assessments, and programs that were undertaken in 2000. The Princeton Plasma Physics Laboratory has engaged in fusion energy research since 1951. The long-range goal of the U.S. Magnetic Fusion Energy Research Program is to create innovations to make fusion power a practical reality -- an alternative energy source. The year 2000 marked the second year of National Spherical Torus Experiment (NSTX) operations and Tokamak Fusion Test Reactor (TFTR) dismantlement and deconstruction activities. A collaboration among fourteen national laboratories, universities, and research institutions, the NSTX is a major element in the U.S. Fusion Energy Sciences Program. It has been designed to test the physics principles of spherical torus (ST) plasmas. The ST concept could play an important role in the development of smaller, more economical fusion power plants. With its completion within budget and ahead of its target schedule, NSTX first plasma occurred on February 12, 1999. In 2000, PPPL's radiological environmental monitoring program measured tritium in the air at on-site and off-site sampling stations. PPPL is capable of detecting small changes in the ambient levels of tritium by using highly sensitive monitors. The operation of an in-stack monitor located on D-site is a requirement of the National Emission Standard for Hazardous Air Pollutants (NESHAPs) regulations with limits set by the Environmental Protection Agency (EPA). Also included in PPPL's radiological environmental monitoring program, are precipitation, surface, ground, a nd

  1. Searching for Dark Matter at the Stawell Underground Physics Laboratory

    Directory of Open Access Journals (Sweden)

    Urquijo Phillip

    2016-01-01

    Full Text Available facility to be built in 2016, located 1 km below the surface in western Victoria, Australia. I will discuss the status of the proposed SABRE experiment, which will be comprised of a pair of high purity 50-60 kg NaI crystal detectors with active veto shielding to be located in labs in the Northern and Southern Hemispheres respectively. I also discuss projects beyond SABRE, including directional dark matter detectors, which will be used to determine the origin of any true dark matter signals.

  2. Needs analysis and project schedule for the Los Alamos National Laboratory (LANL) Health Physics Analysis Laboratory (HPAL) upgrade

    International Nuclear Information System (INIS)

    Rhea, T.A.; Rucker, T.L.; Stafford, M.W.

    1990-01-01

    This report is a needs assessment and project schedule for the Health Physics Analysis Laboratory (HPAL) upgrade project at Los Alamos National Laboratory (LANL). After reviewing current and projected HPAL operations, two custom-developed laboratory information management systems (LIMS) for similar facilities were reviewed; four commercially available LIMS products were also evaluated. This project is motivated by new regulations for radiation protection and training and by increased emphasis on quality assurance (QA). HPAL data are used to: protect the health of radiation workers; document contamination levels for transportation of radioactive materials and for release of materials to the public for uncontrolled use; and verify compliance with environmental emission regulations. Phase 1 of the HPAL upgrade project concentrates on four types of counting instruments which support in excess of 90% of the sample workload at the existing central laboratories. Phase 2 is a refinement phase and also integrates summary-level databases on the central Health, Safety, and Environment (HSE) VAX. Phase 3 incorporates additional instrument types and integrates satellite laboratories into the HPAL LIMS. Phase 1 will be a multi-year, multimillion dollar project. The temptation to approach the upgrade of the HPAL program in a piece meal fashion should be avoided. This is a major project, with clearly-defined goals and priorities, and should be approached as such. Major programmatic and operational impacts will be felt throughout HSE as a result of this upgrade, so effective coordination with key customer contacts will be critical

  3. Digital lock-in amplifier based on soundcard interface for physics laboratory

    Science.gov (United States)

    Sinlapanuntakul, J.; Kijamnajsuk, P.; Jetjamnong, C.; Chotikaprakhan, S.

    2017-09-01

    The purpose of this paper is to develop a digital lock-in amplifier based on soundcard interface for undergraduate physics laboratory. Both series and parallel RLC circuit laboratory are tested because of its well-known, easy to understand and simple confirm. The sinusoidal signal at the frequency of 10 Hz - 15 kHz is generated to the circuits. The amplitude and phase of the voltage drop across the resistor, R are measured in 10 step decade. The signals from soundcard interface and lock-in amplifier are compared. The results give a good correlation. It indicates that the design digital lock-in amplifier is promising for undergraduate physic laboratory.

  4. Princeton Plasma Physics Laboratory (PPPL) seismic hazard analysis

    International Nuclear Information System (INIS)

    Savy, J.

    1989-01-01

    New design and evaluation guidelines for department of energy facilities subjected to natural phenomena hazard, are being finalized. Although still in draft form at this time, the document describing those guidelines should be considered to be an update of previously available guidelines. The recommendations in the guidelines document mentioned above, and simply referred to as the ''guidelines'' thereafter, are based on the best information at the time of its development. In particular, the seismic hazard model for the Princeton site was based on a study performed in 1981 for Lawrence Livermore National Laboratory (LLNL), which relied heavily on the results of the NRC's Systematic Evaluation Program and was based on a methodology and data sets developed in 1977 and 1978. Considerable advances have been made in the last ten years in the domain of seismic hazard modeling. Thus, it is recommended to update the estimate of the seismic hazard at the DOE sites whenever possible. The major differences between previous estimates and the ones proposed in this study for the PPPL are in the modeling of the strong ground motion at the site, and the treatment of the total uncertainty in the estimates to include knowledge uncertainty, random uncertainty, and expert opinion diversity as well. 28 refs

  5. Princeton Plasma Physics Laboratory (PPPL) seismic hazard analysis

    Energy Technology Data Exchange (ETDEWEB)

    Savy, J.

    1989-10-01

    New design and evaluation guidelines for department of energy facilities subjected to natural phenomena hazard, are being finalized. Although still in draft form at this time, the document describing those guidelines should be considered to be an update of previously available guidelines. The recommendations in the guidelines document mentioned above, and simply referred to as the guidelines'' thereafter, are based on the best information at the time of its development. In particular, the seismic hazard model for the Princeton site was based on a study performed in 1981 for Lawrence Livermore National Laboratory (LLNL), which relied heavily on the results of the NRC's Systematic Evaluation Program and was based on a methodology and data sets developed in 1977 and 1978. Considerable advances have been made in the last ten years in the domain of seismic hazard modeling. Thus, it is recommended to update the estimate of the seismic hazard at the DOE sites whenever possible. The major differences between previous estimates and the ones proposed in this study for the PPPL are in the modeling of the strong ground motion at the site, and the treatment of the total uncertainty in the estimates to include knowledge uncertainty, random uncertainty, and expert opinion diversity as well. 28 refs.

  6. Laboratory screening of some saprophytic coffee surface microflora ...

    African Journals Online (AJOL)

    La microflore saprophyte de surface a été isolée des baies de café. Huit isolats ont été sélectionnés pour les tests d\\'antagonisme contre Colletotrichum kahawae. Six isolats (Bacillus macerans [deux isolats], Epicoccum nigrum, Aspergillus niger, Penicillium citrinum et Pestalotiopsis sp) ont été sélectionnés pour avoir ...

  7. Plasma physics an introduction to laboratory, space, and fusion plasmas

    CERN Document Server

    Piel, Alexander

    2017-01-01

    The enlarged new edition of this textbook provides a comprehensive introduction to the basic processes in plasmas and demonstrates that the same fundamental concepts describe cold gas-discharge plasmas, space plasmas, and hot fusion plasmas. Starting from particle drifts in magnetic fields, the principles of magnetic confinement fusion are explained and compared with laser fusion. Collective processes are discussed in terms of plasma waves and instabilities. The concepts of plasma description by magnetohydrodynamics, kinetic theory, and particle simulation are stepwise introduced. Space charge effects in sheath regions, double layers and plasma diodes are given the necessary attention. The novel fundamental mechanisms of dusty plasmas are explored and integrated into the framework of conventional plasmas. The book concludes with a concise description of modern plasma discharges. Written by an internationally renowned researcher in experimental plasma physics, the text keeps the mathematical apparatus simple a...

  8. Development of the negative ion source at the National Laboratory for High Energy Physics

    Energy Technology Data Exchange (ETDEWEB)

    Takagi, Akira [National Lab. for High Energy Physics, Tsukuba, Ibaraki (Japan)

    1997-02-01

    On formation of direct high frequency chopped negative hydrogen ion beam from surface forming type negative hydrogen ion source, incident acceleration due to proton synchrotron was tried for a forming experiment and its application. By overlapping a high frequency pulse onto a bias DC voltage of convertor electrode, control of formation of negative hydrogen ion with high speed RF pulse of 2 MHz could be realized. And, incidence into 12 GeV proton accelerator to catch RF particles with waiting bucket system due to booster synchrotron, was effective for control of longitudinal emittance in the booster synchrotron. As a result, controls of the beam width and shape emitted from the booster synchrotron were possible. On application of high speed chopped negative hydrogen ion beam to accelerator, improvement of beam capture efficiency to the accelerated RF bucket, control of longitudinal emittance of accelerated beam, beam measurement at incidence into the accelerator and so forth were conducted. In this paper, results of the high speed chopped beam formation experiment using surface plasma forming type negative ion source and application of high speed beam chopping method synchronized with high frequency pulse at the National Laboratory of High Energy Physics are described. (G.K.)

  9. Study of Local Reconnection Physics in a Laboratory Plasma

    International Nuclear Information System (INIS)

    Hantao Ji; Troy Carter; Scott Hsu; Masaaki Yamada

    2001-01-01

    A short review of physics results obtained in the Magnetic Reconnection Experiment (MRX) is given with an emphasis on the local features of magnetic reconnection in a controlled environment. Stable two-dimensional current sheets are formed and sustained by induction using two internal coils. The observed reconnection rates are found to be quantitatively consistent with a generalized Sweet-Parker model which incorporates compressibility, unbalanced upstream-downstream pressure, and the effective resistivity. The latter is significantly enhanced over its classical values in the low collisionality regime. Strong local ion heating is measured by an optical probe during the reconnection process, and at least half of the increased ion energy must be due to nonclassical processes, consistent with the resistivity enhancement. Characteristics of high-frequency electrostatic and electromagnetic fluctuations detected in the current sheet suggest presence of the lower-hybrid-drift-like waves with significant magnetic components. The detailed structures of the current sheet are measured and compared with Harris theory and two-fluid theory

  10. Virtual earthquake engineering laboratory with physics-based degrading materials on parallel computers

    Science.gov (United States)

    Cho, In Ho

    For the last few decades, we have obtained tremendous insight into underlying microscopic mechanisms of degrading quasi-brittle materials from persistent and near-saintly efforts in laboratories, and at the same time we have seen unprecedented evolution in computational technology such as massively parallel computers. Thus, time is ripe to embark on a novel approach to settle unanswered questions, especially for the earthquake engineering community, by harmoniously combining the microphysics mechanisms with advanced parallel computing technology. To begin with, it should be stressed that we placed a great deal of emphasis on preserving clear meaning and physical counterparts of all the microscopic material models proposed herein, since it is directly tied to the belief that by doing so, the more physical mechanisms we incorporate, the better prediction we can obtain. We departed from reviewing representative microscopic analysis methodologies, selecting out "fixed-type" multidirectional smeared crack model as the base framework for nonlinear quasi-brittle materials, since it is widely believed to best retain the physical nature of actual cracks. Microscopic stress functions are proposed by integrating well-received existing models to update normal stresses on the crack surfaces (three orthogonal surfaces are allowed to initiate herein) under cyclic loading. Unlike the normal stress update, special attention had to be paid to the shear stress update on the crack surfaces, due primarily to the well-known pathological nature of the fixed-type smeared crack model---spurious large stress transfer over the open crack under nonproportional loading. In hopes of exploiting physical mechanism to resolve this deleterious nature of the fixed crack model, a tribology-inspired three-dimensional (3d) interlocking mechanism has been proposed. Following the main trend of tribology (i.e., the science and engineering of interacting surfaces), we introduced the base fabric of solid

  11. Nuclear and high-energy physics laboratory - LPNHE. Activity report 2002-2003

    International Nuclear Information System (INIS)

    Dagoret-Campagne, Sylvie; Roos, Lydia; Schwemling, Philippe; Cossin, Isabelle; Mathy, Jean-Yves

    2004-01-01

    The LPNHE is a joint research unit (UMR 7585) of the National Institute of Nuclear Physics and Particle Physics (IN2P3), Institute of the National Centre for Scientific Research (CNRS), UPMC and Paris Diderot Paris 7. It hosts several research teams and technical services (computers, electronics, mechanical), and two support services (administration, logistics). The laboratory is engaged in several major experimental programs pursued in the framework of international collaborations with very large research facilities around the world, centers of particle accelerators and observatories. The research programs cover current issues in particle physics, astro-particle and cosmology. This report presents the activities of the laboratory during the years 2002-2003: 1 - Forewords; 2 - Scientific and technical activities of the laboratory: Physics with accelerators (CP Violation, proton-antiproton physics, LHC, Neutrino beams, LEP, future linear electron collider); Physics without accelerators (extreme energy cosmic radiation, Cosmology and supernovae, high-energy gamma astronomy); theoretical physics (QCD, phenomenological approaches); 3 - Technical and administrative activities (electronics, computers, mechanics departments, Administration and general services); 4 - Laboratory life (Teaching, training, Internal activities); 5 - Dissemination of scientific information; 6 - List of publications; 7 - Appendix: staff

  12. On the surface physics affecting solar oscillation frequencies

    DEFF Research Database (Denmark)

    Houdek, G.; Trampedach, R.; Aarslev, M. J.

    2017-01-01

    . In this Letter, we address the physical processes of turbulent convection that are predominantly responsible for the frequency differences between standard models and observations, also called 'surface effects'. We compare measured solar frequencies from the Michelson Doppler Imager instrument on the SOlar...... physics in our model computation, we are able to reproduce the observed solar frequencies to less than or similar to 3 mu Hz without the need of any additional ad hoc functional corrections....

  13. Emittance Measurements at the Langley Chemical Physics Laboratory

    Science.gov (United States)

    Lewis, B. W.

    1960-01-01

    Total hemispherical emittance measurements are made routinely for materials which may be heated by electrical resistance methods over the temperature range of 600 degrees to 2,000 F by using a black-body reference method. This employs a conical black body and a thermopile detector with a calcium fluoride lens. Emittance is obtained by measuring the radiant flux from the specimen strip and comparing it with the flux from an equal area of the black-body cone at the same temperature. The temperature measurements are made by use of thermocouples. It is planned to extend the temperature range of this type of measurement to temperatures above 2,000 F. Another technique has been investigated for measuring emittance of materials not amenable to electrical heating or thermocouple attachment. This method uses a black-body-cavity furnace similar to that used in reference 5 to measure emittance of transparent materials such as glass. The method employs a heated black-body cavity in which the semicircular specimen is allowed to come to the equilibrium temperature of the cavity and then is rotated in front of a water-cooled viewing port where a sensitive thermistor detector alternately views the specimen surface and the black-body cavity. The ratio of the two readings gives the specimen emittance directly, for the temperature of the black body. The detector output is recorded on a fast Brown self-balancing potentiometer. The furnace is provided with a water-cooled blackened shutter which may be inserted behind the specimen to eliminate any transmitted black-body radiation if the specimen is transparent. This apparatus is capable of measuring total normal emittance over the temperature range of 1,000 degrees to 2,000 F. Preliminary data for boron nitride specimens of two thicknesses are shown where total normal emittance is plotted against temperature for two experimental conditions: (1) black-body radiation incident on the back of the specimen and (2) no black-body radiation

  14. SASP - Symposium on atomic, cluster and surface physics '94

    International Nuclear Information System (INIS)

    Maerk, T.D.; Schrittwieser, R.; Smith, D.

    1994-01-01

    This international symposium (Founding Chairman: W. Lindinger, Innsbruck) is one in a continuing biennial series of conferences which seeks to promote the growth of scientific knowledge and its effective exchange among scientists in the field of atomic, molecular, cluster and surface physics and related areas. The symposium deals in particular with interactions between ions, electrons, photons, atoms, molecules, and clusters and their interactions with surfaces. (author)

  15. Nuclear and high-energy physics laboratory - LPNHE. Activity report 2006-2007

    International Nuclear Information System (INIS)

    Debu, Pascal; Ben-Haim, Eli; Hardin, Delphine; Laporte, Didier; Maurin, David; Cossin, Isabelle; Mathy, Jean-Yves

    2008-01-01

    The LPNHE is a joint research unit (UMR 7585) of the National Institute of Nuclear Physics and Particle Physics (IN2P3), Institute of the National Centre for Scientific Research (CNRS), UPMC and Paris Diderot Paris 7. It hosts several research teams and technical services (computers, electronics, mechanical), and two support services (administration, logistics). The laboratory is engaged in several major experimental programs pursued in the framework of international collaborations with very large research facilities around the world, centers of particle accelerators and observatories. The research programs cover current issues in particle physics, astro-particle and cosmology. This report presents the activities of the laboratory during the years 2006-2007: 1 - Forewords; 2 - Scientific activities: Physics with accelerators (LHC, Tevatron, CP Violation, ILC, Neutrino Physics); Physics without accelerators (Cosmology, high-energy gamma astronomy, extreme energy cosmic radiation, theoretical physics, physics-biology interface); 3 - Technical and administrative activities (electronics, computers, mechanics departments, Administration and general services); 4 - Laboratory life (Teaching, training, internships and PhDs); 5 - Internal activities (seminars, meetings..); 6 - External activities (Public information, relations with the industry, valorisation..)

  16. Nuclear and high-energy physics laboratory - LPNHE. Activity report 1996-1997

    International Nuclear Information System (INIS)

    Vaissiere, Christian de la; Boniface, Nicole; Dumas, Jean-Marc; Jos, Jeanne

    1998-01-01

    The LPNHE is a joint research unit (UMR 7585) of the National Institute of Nuclear Physics and Particle Physics (IN2P3), Institute of the National Centre for Scientific Research (CNRS), UPMC and Paris Diderot Paris 7. It hosts several research teams and technical services (computers, electronics, mechanical), and two support services (administration, logistics). The laboratory is engaged in several major experimental programs pursued in the framework of international collaborations with very large research facilities around the world, centers of particle accelerators and observatories. The research programs cover current issues in particle physics, astro-particle and cosmology. This report presents the activities of the laboratory during the years 1996-1997: 1 - Forewords; 2 - Physics experiments: LHC Physics with ATLAS, search for new physics at LEP (DELPHI), Neutrinos oscillation DIRAC experiment, Neutrinos oscillation (NOMAD, TONIC), HERA-H1 experiment, CP Violation (BaBar), DΦ experiment at Tevatron, study of gamma radiation sources (CAT), Supernovae, Auger Laboratory project; 3 - Technical activities and means (electronics, computers, mechanics departments); 4 - Laboratory life (Teaching, Administration and general services, Internal and external activities); 5 - Dissemination of scientific information; 6 - List of publications; 7 - staff

  17. Nuclear and high-energy physics laboratory - LPNHE. Activity report 1998-1999

    International Nuclear Information System (INIS)

    Vaissiere, Christian de la; Banner, Marcel; Faivre, Maria; Moine, Marguerite; Dumas, Jean-Marc; Jos, Jeanne

    2000-01-01

    The LPNHE is a joint research unit (UMR 7585) of the National Institute of Nuclear Physics and Particle Physics (IN2P3), Institute of the National Centre for Scientific Research (CNRS), UPMC and Paris Diderot Paris 7. It hosts several research teams and technical services (computers, electronics, mechanical), and two support services (administration, logistics). The laboratory is engaged in several major experimental programs pursued in the framework of international collaborations with very large research facilities around the world, centers of particle accelerators and observatories. The research programs cover current issues in particle physics, astro-particle and cosmology. This report presents the activities of the laboratory during the years 1998-1999: 1 - Forewords; 2 - Physics experiments: LHC Physics with ATLAS, search for new physics at LEP, DIRAC experiment, Neutrinos oscillation with NOMAD, TONIC and HERA-H1 experiments, CP Violation (BaBar), DΦ experiment at Tevatron, high-energy gamma astronomy, Supernovae, Pierre Auger Laboratory); 3 - Technical activities and means (electronics, computers, mechanics departments); 4 - Laboratory life (Teaching, Administration and general services, Internal and external activities); 5 - Dissemination of scientific information; 6 - List of publications; 7 - staff

  18. Clermont-Ferrand Corpuscular Physics Laboratory - LPCCF. Activity report 2008-2009

    International Nuclear Information System (INIS)

    2010-01-01

    The Clermont-Ferrand Corpuscular Physics Laboratory is a joint research unit of the Blaise Pascal University and the National Centre for Scientific Research (CNRS) which belongs to the French National Institute of Nuclear and particle physics (IN2P3). The main research topic, 'Particle physics' and 'Hadronic matter', represents about 3/4 of the laboratory activities and are carried out in the framework of big international cooperations. Other activities of LPCCF are pluri-disciplinary and are related to nuclear physics applications, like isotope dating, low radioactivities, low-dose biological radiation effects, biomaterials, medical imaging etc.. This report presents the activities of the laboratory during the years 2008-2009: 1 - Forewords; 2 - Theoretical physics; 3 - Particle and astro-particle physics; 4 - Hadronic matter; 5 - Interdisciplinary research; 6 - General services; 7 - Laboratory organisation and means; 8 - Teaching activity; 9 - PhDs, accreditations to supervise research and Technology Research Diplomas 10 - Communication; 11 - Regional policy and valorisation; 12 - Scientific production 13 - Public information; 14 - Staff

  19. The PASCO Wireless Smart Cart: A Game Changer in the Undergraduate Physics Laboratory

    Science.gov (United States)

    Shakur, Asif; Connor, Rainor

    2018-03-01

    With the introduction of the Wireless Smart Cart by PASCO scientific in April 2016, we expect a paradigm shift in undergraduate physics laboratory instruction. We have evaluated the feasibility of using the smart cart by carrying out experiments that are usually performed using traditional PASCO equipment. The simplicity, convenience, and cost-saving achieved by replacing a plethora of traditional laboratory sensors, wires, and equipment clutter with the smart cart are reported here.

  20. Making physics: a biography of Brookhaven National Laboratory, 1946-1972, by R.P. Crease

    International Nuclear Information System (INIS)

    Schoessow, P.

    2000-01-01

    Brookhaven National Laboratory was the first major national laboratory built for basic civilian research. From Nobel Prize-winning work in atomic physics to addressing community concerns over radiation leaks, the history of Brookhaven parallels the changing fortunes of 'big science' in the United States. Robert P. Crease brings to life the people, the instruments, the science, and the politics of Brookhaven's first quarter-century.

  1. A physically-based model of global freshwater surface temperature

    NARCIS (Netherlands)

    van Beek, L.P.H.; Eikelboom, T.; van Vliet, M.T.H.; Bierkens, M.F.P.

    2012-01-01

    Temperature determines a range of physical properties of water and exerts a strong control on surface water biogeochemistry. Thus, in freshwater ecosystems the thermal regime directly affects the geographical distribution of aquatic species through their growth and metabolism and indirectly through

  2. A physically based model of global freshwater surface temperature

    NARCIS (Netherlands)

    Beek, van L.P.H.; Eikelboom, T.; Vliet, van M.T.H.; Bierkens, M.F.P.

    2012-01-01

    Temperature determines a range of physical properties of water and exerts a strong control on surface water biogeochemistry. Thus, in freshwater ecosystems the thermal regime directly affects the geographical distribution of aquatic species through their growth and metabolism and indirectly through

  3. Hydrodynamic systems for assessing surface fouling, soil adherence and cleaning in laboratory installations

    Directory of Open Access Journals (Sweden)

    Detry JG.

    2009-01-01

    Full Text Available Five hydrodynamic systems are presented in this short review: the parallel plate flow cell, the impinging jet, the radial flow cell, the rotating disk and fluid dynamic gauging. These systems are of particular relevance to study surface fouling, surface cleaning or adhesion onto solid surfaces in laboratory environment. The key features of their hydrodynamics are given as well as their practical advantages and drawbacks. Examples of applications fields are also listed.

  4. Nuclear and high-energy physics laboratory - LPNHE. Activity report 2004-2005

    International Nuclear Information System (INIS)

    Debu, Pascal; Bassler, Ursula; Boratav, Murat; Lacour, Didier; Lebbolo, Herve; Cossin, Isabelle; Mathy, Jean-Yves

    2006-01-01

    The LPNHE is a joint research unit (UMR 7585) of the National Institute of Nuclear Physics and Particle Physics (IN2P3), Institute of the National Centre for Scientific Research (CNRS), UPMC and Paris Diderot Paris 7. It hosts several research teams and technical services (computers, electronics, mechanical), and two support services (administration, logistics). The laboratory is engaged in several major experimental programs pursued in the framework of international collaborations with very large research facilities around the world, centers of particle accelerators and observatories. The research programs cover current issues in particle physics, astro-particle and cosmology. This report presents the activities of the laboratory during the years 2004-2005: 1 - Forewords; 2 - Scientific activities: Physics with accelerators (LHC, Tevatron, CP Violation, future linear electron collider, Neutrino beams); Physics without accelerators (Cosmology and supernovae, high-energy gamma astronomy, extreme energy cosmic radiation, theoretical physics, physics-biology interface); 3 - Technical and administrative activities (electronics, computers, mechanics departments, Administration, health and safety, radiation protection); 4 - Laboratory life (Teaching, training, internships and PhDs); 5 - Internal activities (seminars, meetings..); 6 - External activities (Public information, relations with the industry, valorisation..); 7 - List of publications; 8 - Appendixes: organigram, staff

  5. Surface and Interface Physics of Correlated Electron Materials

    Energy Technology Data Exchange (ETDEWEB)

    Millis, Andrew [Columbia Univ., New York, NY (United States)

    2004-09-01

    The {\\it Surface and Interface Physics of Correlated Electron Materials} research program provided conceptual understanding of and theoretical methodologies for understanding the properties of surfaces and interfaces involving materials exhibiting strong electronic correlations. The issues addressed in this research program are important for basic science, because the behavior of correlated electron superlattices is a crucial challenge to and crucial test of our understanding of the grand-challenge problem of correlated electron physics and are important for our nation's energy future because correlated interfaces offer opportunities for the control of phenomena needed for energy and device applications. Results include new physics insights, development of new methods, and new predictions for materials properties.

  6. Surface treatments for biological, chemical and physical applications

    CERN Document Server

    Karaman, Mustafa

    2017-01-01

    A step-by-step guide to the topic with a mix of theory and practice in the fields of biology, chemistry and physics. Straightforward and well-structured, the first chapter introduces fundamental aspects of surface treatments, after which examples from nature are given. Subsequent chapters discuss various methods to surface modification, including chemical and physical approaches, followed by the characterization of the functionalized surfaces. Applications discussed include the lotus effect, diffusion barriers, enzyme immobilization and catalysis. Finally, the book concludes with a look at future technology advances. Throughout the text, tutorials and case studies are used for training purposes to grant a deeper understanding of the topic, resulting in an essential reference for students as well as for experienced engineers in R&D.

  7. Asking the Next Generation: The Implementation of Pre-University Students' Ideas about Physics Laboratory Preparation Exercises

    Science.gov (United States)

    Dunnett, K.; Bartlett, P. A.

    2018-01-01

    It was planned to introduce online pre-laboratory session activities to a first-year undergraduate physics laboratory course to encourage a minimum level of student preparation for experiments outside the laboratory environment. A group of 16 and 17 year old laboratory work-experience students were tasked to define and design a pre-laboratory…

  8. A physically based model of global freshwater surface temperature

    Science.gov (United States)

    van Beek, Ludovicus P. H.; Eikelboom, Tessa; van Vliet, Michelle T. H.; Bierkens, Marc F. P.

    2012-09-01

    Temperature determines a range of physical properties of water and exerts a strong control on surface water biogeochemistry. Thus, in freshwater ecosystems the thermal regime directly affects the geographical distribution of aquatic species through their growth and metabolism and indirectly through their tolerance to parasites and diseases. Models used to predict surface water temperature range between physically based deterministic models and statistical approaches. Here we present the initial results of a physically based deterministic model of global freshwater surface temperature. The model adds a surface water energy balance to river discharge modeled by the global hydrological model PCR-GLOBWB. In addition to advection of energy from direct precipitation, runoff, and lateral exchange along the drainage network, energy is exchanged between the water body and the atmosphere by shortwave and longwave radiation and sensible and latent heat fluxes. Also included are ice formation and its effect on heat storage and river hydraulics. We use the coupled surface water and energy balance model to simulate global freshwater surface temperature at daily time steps with a spatial resolution of 0.5° on a regular grid for the period 1976-2000. We opt to parameterize the model with globally available data and apply it without calibration in order to preserve its physical basis with the outlook of evaluating the effects of atmospheric warming on freshwater surface temperature. We validate our simulation results with daily temperature data from rivers and lakes (U.S. Geological Survey (USGS), limited to the USA) and compare mean monthly temperatures with those recorded in the Global Environment Monitoring System (GEMS) data set. Results show that the model is able to capture the mean monthly surface temperature for the majority of the GEMS stations, while the interannual variability as derived from the USGS and NOAA data was captured reasonably well. Results are poorest for

  9. Using instructional laboratories and research experiences in physics to build better people

    Science.gov (United States)

    Robinson, Sean

    2014-03-01

    I will describe ways in which instructional laboratories and research activities can interact in an undergraduate physics curriculum -- using the MIT Physics program both as an example of good practices and as a reflection of commonly occurring difficulties -- and argue that when executed as complementary elements of an academic program, research and instructional labs support not only the professional development of the student as a skilled scientist, but also the humanistic development of the student as a scientific thinker.

  10. Using Raman Spectroscopy and Surface-Enhanced Raman Scattering to Identify Colorants in Art: An Experiment for an Upper-Division Chemistry Laboratory

    Science.gov (United States)

    Mayhew, Hannah E.; Frano, Kristen A.; Svoboda, Shelley A.; Wustholz, Kristin L.

    2015-01-01

    Surface-enhanced Raman scattering (SERS) studies of art represent an attractive way to introduce undergraduate students to concepts in nanoscience, vibrational spectroscopy, and instrumental analysis. Here, we present an undergraduate analytical or physical chemistry laboratory wherein a combination of normal Raman and SERS spectroscopy is used to…

  11. Laboratory Activity Worksheet to Train High Order Thinking Skill of Student on Surface Chemistry Lecture

    Science.gov (United States)

    Yonata, B.; Nasrudin, H.

    2018-01-01

    A worksheet has to be a set with activity which is help students to arrange their own experiments. For this reason, this research is focused on how to train students’ higher order thinking skills in laboratory activity by developing laboratory activity worksheet on surface chemistry lecture. To ensure that the laboratory activity worksheet already contains aspects of the higher order thinking skill, it requires theoretical and empirical validation. From the data analysis results, it shows that the developed worksheet worth to use. The worksheet is worthy of theoretical and empirical feasibility. This conclusion is based on the findings: 1) Assessment from the validators about the theoretical feasibility aspects in the category is very feasible with an assessment range of 95.24% to 97.92%. 2) students’ higher thinking skill from N Gain values ranges from 0.50 (enough) to 1.00 (high) so it can be concluded that the laboratory activity worksheet on surface chemistry lecture is empirical in terms of worth. The empirical feasibility is supported by the responses of the students in very reasonable categories. It is expected that the laboratory activity worksheet on surface chemistry lecture can train students’ high order thinking skills for students who program surface chemistry lecture.

  12. Students' assessment of interactive distance experimentation in nuclear reactor physics laboratory education

    Science.gov (United States)

    Malkawi, Salaheddin; Al-Araidah, Omar

    2013-10-01

    Laboratory experiments develop students' skills in dealing with laboratory instruments and physical processes with the objective of reinforcing the understanding of the investigated subject. In nuclear engineering, where research reactors play a vital role in the practical education of students, the high cost and long construction time of research reactors limit their accessibility to few educational programmes around the world. The concept of the Internet Reactor Laboratory (IRL) was introduced earlier as a new approach that utilises distance education in nuclear reactor physics laboratory education. This paper presents an initial assessment of the implementation of the IRL between the PULSTAR research reactor at North Carolina State University in the USA and the Department of Nuclear Engineering at Jordan University of Science and Technology (JUST) in Jordan. The IRL was implemented in teaching the Nuclear Reactor laboratory course for two semesters. Feedback from surveyed students verifies that the outcomes attained from using IRL in experimentation are comparable to that attainable from other on-campus laboratories performed by the students.

  13. Accelerator-based techniques for the support of senior-level undergraduate physics laboratories

    Science.gov (United States)

    Williams, J. R.; Clark, J. C.; Isaacs-Smith, T.

    2001-07-01

    Approximately three years ago, Auburn University replaced its aging Dynamitron accelerator with a new 2MV tandem machine (Pelletron) manufactured by the National Electrostatics Corporation (NEC). This new machine is maintained and operated for the University by Physics Department personnel, and the accelerator supports a wide variety of materials modification/analysis studies. Computer software is available that allows the NEC Pelletron to be operated from a remote location, and an Internet link has been established between the Accelerator Laboratory and the Upper-Level Undergraduate Teaching Laboratory in the Physics Department. Additional software supplied by Canberra Industries has also been used to create a second Internet link that allows live-time data acquisition in the Teaching Laboratory. Our senior-level undergraduates and first-year graduate students perform a number of experiments related to radiation detection and measurement as well as several standard accelerator-based experiments that have been added recently. These laboratory exercises will be described, and the procedures used to establish the Internet links between our Teaching Laboratory and the Accelerator Laboratory will be discussed.

  14. Accelerator-based techniques for the support of senior-level undergraduate physics laboratories

    International Nuclear Information System (INIS)

    Williams, J.R.; Clark, J.C.; Isaacs-Smith, T.

    2001-01-01

    Approximately three years ago, Auburn University replaced its aging Dynamitron accelerator with a new 2MV tandem machine (Pelletron) manufactured by the National Electrostatics Corporation (NEC). This new machine is maintained and operated for the University by Physics Department personnel, and the accelerator supports a wide variety of materials modification/analysis studies. Computer software is available that allows the NEC Pelletron to be operated from a remote location, and an Internet link has been established between the Accelerator Laboratory and the Upper-Level Undergraduate Teaching Laboratory in the Physics Department. Additional software supplied by Canberra Industries has also been used to create a second Internet link that allows live-time data acquisition in the Teaching Laboratory. Our senior-level undergraduates and first-year graduate students perform a number of experiments related to radiation detection and measurement as well as several standard accelerator-based experiments that have been added recently. These laboratory exercises will be described, and the procedures used to establish the Internet links between our Teaching Laboratory and the Accelerator Laboratory will be discussed

  15. A Laboratory Exercise Using a Physical Model for Demonstrating Countercurrent Heat Exchange

    Science.gov (United States)

    Loudon, Catherine; Davis-Berg, Elizabeth C.; Botz, Jason T.

    2012-01-01

    A physical model was used in a laboratory exercise to teach students about countercurrent exchange mechanisms. Countercurrent exchange is the transport of heat or chemicals between fluids moving in opposite directions separated by a permeable barrier (such as blood within adjacent blood vessels flowing in opposite directions). Greater exchange of…

  16. A Stopped-Flow Kinetics Experiment for the Physical Chemistry Laboratory Using Noncorrosive Reagents

    Science.gov (United States)

    Prigodich, Richard V.

    2014-01-01

    Stopped-flow kinetics techniques are important to the study of rapid chemical and biochemical reactions. Incorporation of a stopped-flow kinetics experiment into the physical chemistry laboratory curriculum would therefore be an instructive addition. However, the usual reactions studied in such exercises employ a corrosive reagent that can over…

  17. X-Ray Diffraction of Intermetallic Compounds: A Physical Chemistry Laboratory Experiment

    Science.gov (United States)

    Varberg, Thomas D.; Skakuj, Kacper

    2015-01-01

    Here we describe an experiment for the undergraduate physical chemistry laboratory in which students synthesize the intermetallic compounds AlNi and AlNi3 and study them by X-ray diffractometry. The compounds are synthesized in a simple one-step reaction occurring in the solid state. Powder X-ray diffractograms are recorded for the two compounds…

  18. Conditions for Building a Community of Practice in an Advanced Physics Laboratory

    Science.gov (United States)

    Irving, Paul W.; Sayre, Eleanor C.

    2014-01-01

    We use the theory of communities of practice and the concept of accountable disciplinary knowledge to describe how a learning community develops in the context of an upper-division physics laboratory course. The change in accountable disciplinary knowledge motivates students' enculturation into a community of practice. The enculturation process is…

  19. Data Analysis and Graphing in an Introductory Physics Laboratory: Spreadsheet versus Statistics Suite

    Science.gov (United States)

    Peterlin, Primoz

    2010-01-01

    Two methods of data analysis are compared: spreadsheet software and a statistics software suite. Their use is compared analysing data collected in three selected experiments taken from an introductory physics laboratory, which include a linear dependence, a nonlinear dependence and a histogram. The merits of each method are compared. (Contains 7…

  20. Identifying types of physical activity with a single accelerometer: Evaluating laboratory trained algorithms in daily life

    NARCIS (Netherlands)

    Cuba Gyllensten, I.; Bonomi, A.G.

    2011-01-01

    Accurate identification of physical activity types has been achieved in laboratory conditions using single-site accelerometers and classification algorithms. This methodology is then applied to free-living subjects to determine activity behaviour. This study aimed at analysing the reproducibility of

  1. Evaluation of Virtual Laboratory Package on Nigerian Secondary School Physics Concepts

    Science.gov (United States)

    Falode, Oluwole Caleb; Gambari, Amosa Isiaka

    2017-01-01

    The study evaluated accessibility, flexibility, cost and learning effectiveness of researchers-developed virtual laboratory package for Nigerian secondary school physics. Based on these issues, four research questions were raised and answered. The study was a quantitative-based evaluation research. Sample for the study included 24 physics…

  2. Thermodynamic Exploration of Eosin-Lysozyme Binding: A Physical Chemistry and Biochemistry Laboratory Experiment

    Science.gov (United States)

    Huisman, Andrew J.; Hartsell, Lydia R.; Krueger, Brent P.; Pikaart, Michael J.

    2010-01-01

    We developed a modular pair of experiments for use in the undergraduate physical chemistry and biochemistry laboratories. Both experiments examine the thermodynamics of the binding of a small molecule, eosin Y, to the protein lysozyme. The assay for binding is the quenching of lysozyme fluorescence by eosin through resonant energy transfer. In…

  3. Computer Based Learning in an Undergraduate Physics Laboratory: Interfacing and Instrument Control Using Matlab

    Science.gov (United States)

    Sharp, J. S.; Glover, P. M.; Moseley, W.

    2007-01-01

    In this paper we describe the recent changes to the curriculum of the second year practical laboratory course in the School of Physics and Astronomy at the University of Nottingham. In particular, we describe how Matlab has been implemented as a teaching tool and discuss both its pedagogical advantages and disadvantages in teaching undergraduate…

  4. Experimenting with Impacts in a Conceptual Physics or Descriptive Astronomy Laboratory

    Science.gov (United States)

    LoPresto, Michael C.

    2016-01-01

    What follows is a description of the procedure for and results of a simple experiment on the formation of impact craters designed for the laboratory portions of lower mathematical-level general education science courses such as conceptual physics or descriptive astronomy. The experiment provides necessary experience with data collection and…

  5. To What Extent Does A-Level Physics Prepare Students for Undergraduate Laboratory Work?

    Science.gov (United States)

    Thompson, Alaric

    2012-01-01

    This paper is a summary of a small-scale research project carried out to investigate the transition from A-level to university physics, with a specific focus on practical or laboratory skills. A brief description of the methods used precedes the headline findings of the research. A non-evidential discussion of the possible reasons behind any…

  6. Learning in Physics by Doing Laboratory Work: Towards a New Conceptual Framework

    Science.gov (United States)

    Danielsson, Anna Teresia; Linder, Cedric

    2009-01-01

    Drawing on a study that explores university students' experiences of doing laboratory work in physics, this article outlines a proposed conceptual framework for extending the exploration of the gendered experience of learning. In this framework situated cognition and post-structural gender theory are merged together. By drawing on data that aim at…

  7. Teaching a Chemistry MOOC with a Virtual Laboratory: Lessons Learned from an Introductory Physical Chemistry Course

    Science.gov (United States)

    O'Malley, Patrick J.; Agger, Jonathan R.; Anderson, Michael W.

    2015-01-01

    An analysis is presented of the experience and lessons learned of running a MOOC in introductory physical chemistry. The course was unique in allowing students to conduct experimental measurements using a virtual laboratory constructed using video and simulations. A breakdown of the student background and motivation for taking the course is…

  8. Adding Vectors across the North: Development of Laboratory Component of Distance Education Physics Course

    Science.gov (United States)

    Spencer, V. K.; Solie, D. J.

    2010-12-01

    Bush Physics for the 21st Century (BP21) is a distance education physics course offered through the Interior Aleutians Campus of the University of Alaska Fairbanks. It provides an opportunity for rural Alaskan high school and community college students, many of whom have no other access to advanced science courses, to earn university science credit. The curriculum is mathematically rigorous and includes a laboratory component to prepare students who wish to pursue science and technology careers. The laboratory component has been developed during the past 3 years. Students learn lab safety, basic laboratory technique, experiment components and group collaboration. Experiments have place-based themes and involve skills that translate to rural Alaska when possible. Preliminary data on the general effectiveness of the labs have been analyzed and used to improve the course.

  9. Wetting of two-dimensional physically patterned surfaces

    Science.gov (United States)

    Bell, Michael Scott

    An understanding of wetting phenomena is important, in part, due to the many practical applications of controlled wetting. Some of the most exciting applications involve superhydrophobic surfaces, on which water droplets exhibit contact angles larger than 150° and contact angle hysteresis less than 10°. These surfaces are notable for their low-drag, antifouling, and self-cleaning properties, among others. Wetting is known to be affected by both the chemistry and the physical patterning of a surface, with the chemistry affecting what is called the intrinsic contact angle, which is the contact angle displayed by a droplet on a smooth flat surface made of the given material. To date, the largest intrinsic contact angle observed for any material is only about 120°, which does not confer superhydrophobicity. Thus, physical patterning is a crucial component of any superhydrophobic surface. Interestingly, many natural examples of superhydrophobic surfaces exist, with one of the most notable being the lotus leaf. In designing such surfaces, scientists have turned to the natural examples for inspiration, and have found that most natural examples have multiple (usually two) scales of roughness, commonly referred to as hierarchical roughness. Though hierarchical roughness is ubiquitous in the superhydrophobic surfaces of the natural world, its precise role in conferring superhydrophobicity has so far remained elusive. In this work, we develop a thermodynamic model to study the wetting of two-dimensional physically patterned surfaces. Past models that have been developed for this purpose often make several assumptions: the drop must be much larger than the surface features while simultaneously being small enough that the effects of gravity are negligible. Many of these models ultimately rely on the older Cassie and Wenzel models, which themselves make assumptions about the drop size relative to the surface features--namely that the drop is again much larger than the surface

  10. Zero-gravity cloud physics laboratory: Candidate experiments definition and preliminary concept studies

    Science.gov (United States)

    Eaton, L. R.; Greco, R. V.; Hollinden, A. B.

    1973-01-01

    The candidate definition studies on the zero-g cloud physics laboratory are covered. This laboratory will be an independent self-contained shuttle sortie payload. Several critical technology areas have been identified and studied to assure proper consideration in terms of engineering requirements for the final design. Areas include chambers, gas and particle generators, environmental controls, motion controls, change controls, observational techniques, and composition controls. This unique laboratory will allow studies to be performed without mechanical, aerodynamics, electrical, or other type techniques to support the object under study. This report also covers the candidate experiment definitions, chambers and experiment classes, laboratory concepts and plans, special supporting studies, early flight opportunities and payload planning data for overall shuttle payload requirements assessments.

  11. Using Performance Assessment Model in Physics Laboratory to Increase Students’ Critical Thinking Disposition

    Science.gov (United States)

    Emiliannur, E.; Hamidah, I.; Zainul, A.; Wulan, A. R.

    2017-09-01

    Performance Assessment Model (PAM) has been developed to represent the physics concepts which able to be devided into five experiments: 1) acceleration due to gravity; 2) Hooke’s law; 3) simple harmonic motion; 4) work-energy concepts; and 5) the law of momentum conservation. The aim of this study was to determine the contribution of PAM in physics laboratory to increase students’ Critical Thinking Disposition (CTD) at senior high school. Subject of the study were 11th grade consist 32 students of a senior high school in Lubuk Sikaping, West Sumatera. The research used one group pretest-postest design. Data was collected through essay test and questionnaire about CTD. Data was analyzed using quantitative way with N-gain value. This study concluded that performance assessmet model effectively increases the N-gain at medium category. It means students’ critical thinking disposition significant increase after implementation of performance assessment model in physics laboratory.

  12. Feasibility study of a zero-gravity (orbital) atmospheric cloud physics experiments laboratory

    Science.gov (United States)

    Hollinden, A. B.; Eaton, L. R.

    1972-01-01

    A feasibility and concepts study for a zero-gravity (orbital) atmospheric cloud physics experiment laboratory is discussed. The primary objective was to define a set of cloud physics experiments which will benefit from the near zero-gravity environment of an orbiting spacecraft, identify merits of this environment relative to those of groundbased laboratory facilities, and identify conceptual approaches for the accomplishment of the experiments in an orbiting spacecraft. Solicitation, classification and review of cloud physics experiments for which the advantages of a near zero-gravity environment are evident are described. Identification of experiments for potential early flight opportunities is provided. Several significant accomplishments achieved during the course of this study are presented.

  13. Landmarks in particle physics at Brookhaven National Laboratory: Brookhaven Lecture Series, Number 238

    International Nuclear Information System (INIS)

    Adair, R.K.

    1987-01-01

    Robert Adair's lecture on Landmarks in Particle Physics at Brookhaven National Laboratory (BNL) is a commemoration of the 40th Anniversary of Brookhaven National Laboratory. Adair describes ten researches in elementary particle physics at Brookhaven that had a revolutionary impact on the understanding of elementary particles. Two of the discoveries were made in 1952 and 1956 at the Cosmotron, BNL's first proton accelerator. Four were made in 1962 and 1964 at the Alternating Gradient Synchrotron, the Cosmotron's replacement. Two other discoveries in 1954 and 1956 were theoretical, and strong focusing (1952) is the only technical discovery. One discovery (1958) happened in an old barrack. Four of the discoveries were awarded the Nobel prize in Physics. Adair believes that all of the discoveries are worthy of the Nobel prize. 14 figs

  14. A multivariate assessment of the effect of the laboratory homework component of a microcomputer-based laboratory for a college freshman physics course

    Science.gov (United States)

    Ramlo, Susan E.

    Microcomputer-based laboratories (MBLs) have been defined as software that uses an electronic probe to collect information about a physical system and then converts that information into graphical systems in real-time. Realtime Physics Laboratories (RTP) are an example of laboratories that combine the use of MBLs with collaboration and guided-inquiry. RTP Mechanics Laboratories include both laboratory activities and laboratory homework for the first semester of college freshman physics courses. Prior research has investigated the effectiveness of the RTP laboratories as a package (laboratory activities with laboratory homework). In this study, an experimental-treatment had students complete both the RTP laboratory activity and the associated laboratory homework during the same laboratory period. Observations of this treatment indicated that students primarily consulted the laboratory instructor and referred to their completed laboratory activity while completing the homework in their collaborative groups. In the control-treatment, students completed the laboratory homework outside the laboratory period. Measures of force and motion conceptual understanding included the Force and Motion Conceptual Understanding (FMCE), a 47 multiple-choice question test. Analyses of the FMCE indicated that it is both a reliable and a valid measure of force and motion conceptual understanding. A distinct, five-factor structure for the FMCE post-test answers reflected specific concepts related to force and motion. However, the three FMCE pretest factors were less distinct. Analysis of the experimental-treatment, compared to a control-treatment, included multiple regression analysis with covariates of age, prior physics-classroom experience, and the three FMCE pretest factors. Criterion variables included each of the five post-test factors, the total laboratory homework score, and a group of seven exam questions. The results were all positive, in favor of the experimental

  15. LAPP - Annecy le Vieux Particle Physics Laboratory. Activity report 2002-2003

    International Nuclear Information System (INIS)

    Colas, Jacques; Minard, Marie-Noelle; Decamp, Daniel; Marion, Frederique; Drancourt, Cyril; Riva, Vanessa; Berger, Nicole; Bombar, Claudine; Dromby, Gerard

    2004-01-01

    LAPP is a high energy physics laboratory founded in 1976 and is one of the 19 laboratories of IN2P3 (National Institute of Nuclear and particle physics), institute of CNRS (National Centre for Scientific Research). LAPP is joint research facility of the University Savoie Mont Blanc (USMB) and the CNRS. Research carried out at LAPP aims at understanding the elementary particles and the fundamental interactions between them as well as exploring the connections between the infinitesimally small and the unbelievably big. Among other subjects LAPP teams try to understand the origin of the mass of the particles, the mystery of dark matter and what happened to the anti-matter that was present in the early universe. LAPP researchers work in close contact with phenomenologist teams from LAPTh, a theory laboratory hosted in the same building. LAPP teams also work since several decades at understanding the neutrinos, those elementary almost massless particles with amazing transformation properties. They took part in the design and realization of several experiments. Other LAPP teams collaborate in experiments studying signals from the cosmos. This document presents the activities of the laboratory during the years 2002-2003: 1 - Presentation of LAPP; 2 - Experimental programs: Standard model and its extensions (accurate measurements and search for new particles, The end of ALEPH and L3 LEP experiments, ATLAS experiment at LHC, CMS experiment at LHC); CP violation (BaBar experiment on PEPII collider at SLAC, LHCb experiment); Neutrino physics (OPERA experiment on CERN's CNGS neutrino beam); Astro-particles (AMS experiment, EUSO project on the Columbus module of the International Space Station); Search for gravitational waves - Virgo experiment; 3 - Laboratory's know-how: Skills, Technical departments (Electronics, Computers, Mechanics); R and D - CLIC and Positrons; Valorisation and industrial relations; 4 - Laboratory operation: Administration and general services

  16. Argonne National Laboratory, High Energy Physics Division, semiannual report of research activities, July 1, 1989--December 31, 1989

    Energy Technology Data Exchange (ETDEWEB)

    1989-01-01

    This report discusses research being conducted at the Argonne National Laboratory in the following areas: Experimental High Energy Physics; Theoretical High Energy Physics; Experimental Facilities Research; Accelerator Research and Development; and SSC Detector Research and Development.

  17. Robert A. Millikan Award Lecture (August 2002): Global Study of the Role of the Laboratory in Physics Education.

    Science.gov (United States)

    George, Simon

    2003-01-01

    Presents the lecture given by the Millikan Award winner on a global study of the role of the laboratory in physics education. Discusses physics education in India, Malaysia, Great Britain, and the United States. (NB)

  18. Argonne National Laboratory, High Energy Physics Division, semiannual report of research activities, July 1, 1989--December 31, 1989

    International Nuclear Information System (INIS)

    1989-01-01

    This report discusses research being conducted at the Argonne National Laboratory in the following areas: Experimental High Energy Physics; Theoretical High Energy Physics; Experimental Facilities Research; Accelerator Research and Development; and SSC Detector Research and Development

  19. IAEA Laboratory activities. The IAEA Laboratories at Vienna and Seibersdorf, the International Laboratory of Marine Radioactivity at Monaco, the International Centre for Theoretical Physics at Trieste, the Middle Eastern Regional Radioisotope Centre for the Arab Countries, Cairo. Fourth report

    International Nuclear Information System (INIS)

    1967-01-01

    This fourth 'IAEA Laboratory Activities' report describes development and work during the year 1966. It includes activities of the IAEA Laboratories at Vienna and Seibersdorf, the International Laboratory of Marine Radioactivity at Monaco, the International Centre for Theoretical Physics at Trieste, and the Middle Eastern Regional Radioisotope Centre for the Arab Countries at Cairo. (author)

  20. IAEA laboratory activities. The IAEA laboratories at Vienna and Seibersdorf, the International Laboratory of Marine Radioactivity at Monaco, the International Centre for Theoretical Physics at Trieste, the Middle Eastern Regional Radioisotope Centre for the Arab Countries, Cairo. 3rd report

    International Nuclear Information System (INIS)

    1966-01-01

    This third 'IAEA Laboratory Activities' report describes development and work during the year 1965. It includes activities of the IAEA Laboratories at Vienna and Seibersdorf, the International Laboratory of Marine Radioactivity at Monaco, the International Centre for Theoretical Physics at Trieste, and the Middle Eastern Regional Radioisotope Centre for the Arab Countries at Cairo

  1. Surface water data at Los Alamos National Laboratory: 2008 water year

    Energy Technology Data Exchange (ETDEWEB)

    Ortiz, David; Cata, Betsy; Kuyumjian, Gregory

    2009-09-01

    The principal investigators collected and computed surface water discharge data from 69 stream-gage stations that cover most of Los Alamos National Laboratory and one at Bandelier National Monument. Also included are discharge data from three springs— two that flow into Cañon de Valle and one that flows into Water Canyon.

  2. Surface Water Data at Los Alamos National Laboratory 2006 Water Year

    Energy Technology Data Exchange (ETDEWEB)

    R.P. Romero, D. Ortiz, G. Kuyumjian

    2007-08-01

    The principal investigators collected and computed surface water discharge data from 44 stream-gaging stations that cover most of Los Alamos National Laboratory and one at Bandelier National Monument. Also included are discharge data from three springs--two that flow into Canon de Valle and one that flows into Water Canyon--and peak flow data for 44 stations.

  3. Shielding concepts for low-background proportional counter arrays in surface laboratories

    International Nuclear Information System (INIS)

    Aalseth, C.E.; Humble, P.H.; Mace, E.K.; Orrell, J.L.; Seifert, A.; Williams, R.M.

    2016-01-01

    Development of ultra low background gas proportional counters has made the contribution from naturally occurring radioactive isotopes – primarily α and β activity in the uranium and thorium decay chains – inconsequential to instrumental sensitivity levels when measurements are performed in above ground surface laboratories. Simple lead shielding is enough to mitigate against gamma rays as gas proportional counters are already relatively insensitive to naturally occurring gamma radiation. The dominant background in these surface laboratory measurements using ultra low background gas proportional counters is due to cosmic ray generated muons, neutrons, and protons. Studies of measurements with ultra low background gas proportional counters in surface and underground laboratories as well as radiation transport Monte Carlo simulations suggest a preferred conceptual design to achieve the highest possible sensitivity from an array of low background gas proportional counters when operated in a surface laboratory. The basis for a low background gas proportional counter array and the preferred shielding configuration is reported, especially in relation to measurements of radioactive gases having low energy decays such as 37 Ar. - Highlights: • Optimization of a cosmic ray shield to measure environmental radioactive gases. • Proportional counter sensitivity may reach ambient environmental 37 Ar concentrations. • Variable length counter method evaluated for low concentration absolute gas counting. • Feasibility of several hour duration preparation of gas samples for 37 Ar measurement.

  4. EVALUATION OF VIRTUAL LABORATORY PACKAGE ON NIGERIAN SECONDARY SCHOOL PHYSICS CONCEPTS

    Directory of Open Access Journals (Sweden)

    Oluwole Caleb FALODE

    2017-04-01

    Full Text Available The study evaluated accessibility, flexibility, cost and learning effectiveness of researchers-developed virtual laboratory package for Nigerian secondary school physics. Based on these issues, four research questions were raised and answered. The study was a quantitative-based evaluation research. Sample for the study included 24 physics teachers, 35 computer experts and 29 physics students who evaluated the package using a questionnaire and physics achievement test. Data gathered were analyzed using descriptive statistics including mean and standard deviation. Findings from the study revealed that the package was adjudged accessible to students within the school (average mean response of 2.98 out of 5, the flexibility of the package was rated low ( average mean response of 2.35 out of 5, and the package, though expensive to develop (total amount spent = $587.50 was considered profitable considering its unquantifiable educational benefits. Also, there was improvement in the achievement scores of students after learning the physics concepts using the package with mean gain score of 33.45. Based on these findings, it was recommended that, developers of learning packages such as virtual laboratories should ensure high flexibility of the packages in order to improve students’ access to such on mobile devices and internet, and government should assist schools financially by providing needed funds for the development of contextually relevant learning packages as their benefits to students’ learning of physics concepts are enormous.

  5. Accelerator laboratories: development centers for experimental physics and technology in Mexico

    International Nuclear Information System (INIS)

    Mazari, M.

    1989-01-01

    Three years ago in this Nuclear Center the author and Professor Graef expounded the inception and development of experimental physics and new techniques centered about laboratories and equipped in our country with positive ion accelerators. Extracted here is the information on the laboratories that have allowed professional training as well as the furtherance of scientific productivity in each group. An additional proposal as to how the technical groups knowledgeable in advanced technology might contribute significantly to adequate preparation of youth at the intermediate level able to generate innocuous micro industries in their own neighbourhood. (Author). 5 refs, 2 figs, 2 tabs

  6. 2D and 3D virtual interactive laboratories of physics on Unity platform

    Science.gov (United States)

    González, J. D.; Escobar, J. H.; Sánchez, H.; De la Hoz, J.; Beltrán, J. R.

    2017-12-01

    Using the cross-platform game engine Unity, we develop virtual laboratories for PC, consoles, mobile devices and website as an innovative tool to study physics. There is extensive uptake of ICT in the teaching of science and its impact on the learning, and considering the limited availability of laboratories for physics teaching and the difficulties this causes in the learning of school students, we design the virtual laboratories to enhance studentâĂŹs knowledge of concepts in physics. To achieve this goal, we use Unity due to provide support bump mapping, reflection mapping, parallax mapping, dynamics shadows using shadows maps, full-screen post-processing effects and render-to-texture. Unity can use the best variant for the current video hardware and, if none are compatible, to use an alternative shader that may sacrifice features for performance. The control over delivery to mobile devices, web browsers, consoles and desktops is the main reason Unity is the best option among the same kind cross-platform. Supported platforms include Android, Apple TV, Linux, iOS, Nintendo 3DS line, macOS, PlayStation 4, Windows Phone 8, Wii but also an asset server and Nvidia’s PhysX physics engine which is the most relevant tool on Unity for our PhysLab.

  7. The Impact of Internet Virtual Physics Laboratory Instruction on the Achievement in Physics, Science Process Skills and Computer Attitudes of 10th-Grade Students

    Science.gov (United States)

    Yang, Kun-Yuan; Heh, Jia-Sheng

    2007-01-01

    The purpose of this study was to investigate and compare the impact of Internet Virtual Physics Laboratory (IVPL) instruction with traditional laboratory instruction in physics academic achievement, performance of science process skills, and computer attitudes of tenth grade students. One-hundred and fifty students from four classes at one private…

  8. Laboratory experiments to investigate radionuclide enrichment in the sea-surface microlayer

    International Nuclear Information System (INIS)

    Hickmott, S.J.B.

    1982-02-01

    Samples of simulated seawater, and seawater from the Irish Sea, were contained in a plastic tank in the laboratory, and bubbles were passed through them to burst at the water surface. The emitted jet droplets, as representing the surface microlayer, were collected on filter papers. Such measurements are easier to perform than similar measurements at sea, and the lack of waves enables greater collection efficiencies to be obtained. The droplet samples were analysed for stable Na, 137 Cs and actinides, and compared with the concentrations in the bulk tank water, in order to examine possible concentration factors for radionuclides in the surface microlayer. (author)

  9. Simulating the Near-Surface Environments of Solar System Bodies in the Laboratory

    Science.gov (United States)

    Donaldson Hanna, K. L.; Bowles, N. E.; Greenhagen, B. T.

    2016-12-01

    Thermal infrared (TIR) emissivity measurements are sensitive to a planetary body's near-surface (upper hundreds of microns) environment, porosity and particle size, which make the interpretation of thermal infrared remote sensing observations of planetary surfaces challenging. Thus, well-constrained laboratory TIR measurements of analogue samples for a range of particle sizes, porosities and near-surface environments are needed. Near-surface environments and porosities for a range of solar system bodies can be simulated using facilities within University of Oxford's Planetary Spectroscopy Facility (PSF). The Simulated Lunar Environment Chamber (SLEC) within Oxford's PSF is a vacuum chamber capable of simulating near-surface conditions for a range of solar system bodies by varying atmospheric pressure and incident solar irradiation. By varying the near-surface environment, the thermal gradient in the upper hundreds of microns of the sample is varied, which can affect the position and contrast of diagnostic features in TIR spectra. The atmospheric pressure inside the chamber is varied between 1000, 5 and < 10-4 mbar to simulate Earth, Mars and airless bodies (e.g. the Moon, Mars' moons and asteroids) conditions. The solar-like irradiation is varied by adjusting the power of the halogen lamp until the brightness temperature of the sample is similar to the brightness temperature of the simulated planetary body. Varying the sample packing in the sample cup simulates a range of near-surface porosities. Here we present laboratory emissivity spectra of a suite of well-characterized rock, soil and mineral samples (< 25 mm in particle size) measured under a range of simulated planetary conditions including Earth, Mars, Moon and asteroids. These well-controlled laboratory measurements enable the interpretation of remote sensing observations, which help in determining a planet's surface composition as well as the consolidated nature of its regolith.

  10. Simulating Near-Surface Environments of Solar System Bodies in the Laboratory

    Science.gov (United States)

    Donaldson Hanna, Kerri; Bowles, Neil

    2017-04-01

    Thermal infrared (TIR) emissivity measurements are sensitive to a planetary body's near-surface (upper hundreds of microns) environment, porosity and particle size, which make the interpretation of thermal infrared remote sensing observations of planetary surfaces challenging. Thus, well-constrained laboratory TIR measurements of analogue samples for a range of particle sizes, porosities and near-surface environments are needed. Near-surface environments and porosities for a range of solar system bodies can be simulated using facilities within University of Oxford's Planetary Spectroscopy Facility (PSF). The Simulated Lunar Environment Chamber (SLEC) within Oxford's PSF is a vacuum chamber capable of simulating near-surface conditions for a range of solar system bodies by varying atmospheric pressure and incident solar irradiation. By varying the near-surface environment, the thermal gradient in the upper hundreds of microns of the sample is varied, which can affect the position and contrast of diagnostic features in TIR spectra. The atmospheric pressure inside the chamber is varied between 1000, 5 and < 10-4 mbar to simulate Earth, Mars and airless bodies (e.g. the Moon, Mars' moons and asteroids) conditions. The solar-like irradiation is varied by adjusting the power of the halogen lamp until the brightness temperature of the sample is similar to the brightness temperature of the simulated planetary body. Varying the sample packing in the sample cup simulates a range of near-surface porosities. Here we present laboratory emissivity spectra of a suite of well-characterized rock, soil and mineral samples (< 25 microns in particle size) measured under a range of simulated planetary conditions including Earth, Mars, Moon and asteroids. These well-controlled laboratory measurements enable the interpretation of remote sensing observations, which help in determining a planet's surface composition as well as the consolidated nature of its regolith.

  11. Surface physics with cold and thermal neutron reflectometry

    International Nuclear Information System (INIS)

    Steyerl, A.

    1991-11-01

    Three aspects of the research project ''Surface physics with cold and ultracold neutron reflectometry'' were stressed during the present first year: (1) Setup of the reflectometer facility at the research reactor of the Rhode Island Nuclear Science Center. The installation provides a narrow ''pencil beam'' analyzed by time of flight using a chopper system. Following beam characterization and a test measurement of the total cross section of copper single crystal first reflectivity measurements are currently performed using a supermirror. (2) Design stud for the ultracold neutron imaging system, with involvement of the relevant industry. Bids are available for several components indicating that it will be very difficult to build the entire system unless further funds become available. (3) Analysis of features of neutron reflection from surfaces with special emphasis on the effect of surface roughness both on the specular beam and the diffusely reflected and refracted intensity. Previous theoretical studies were supplemented by further numerical calculations of diffuse scattering distributions using different models. Application of ultracold and cold neutron reflectometry to the study of liquid-vapor phase transition were discussed. The theoretical work also includes the development of tentative ideas for novel fundamental physics experiments

  12. Laboratory of Corpuscular Physics - LPC Caen. July 2007 - December 2009 activity report

    International Nuclear Information System (INIS)

    2010-01-01

    The ENSICAEN (National Graduate School of Engineering) is an internationally renowned, pluri-disciplinary scientific research centre. Six of its seven laboratories are associated with the French National Centre of Scientific Research (CNRS), one of them also benefiting from the French Atomic and Renewable Energies (CEA) supervision. The Corpuscular Physics Laboratory (LPC) covers the following Research themes: Medical and industrial applications; upstream of the nuclear waste processing cycle; nuclear systems dynamics and thermodynamics; fundamental interactions; research on neutrinos; nuclei at the limits of stability; theoretical and phenomenological physics. This document is the July 2007 - December 2009 Activity report of the LPC-Caen. It presents the following activities: 1 - Physics Research: Nuclear physics (Nuclear structure, Nuclear dynamics and thermodynamics, Theoretical physics and phenomenology); interdisciplinary research (Back-end of the fuel cycle, Medical and industrial applications); FUNDAMENTAL INTERACTIONS and Neutrino Nature (NEMO3 and SuperNEMO experiments, β-ν correlations, n-EDM experiment); 2 - Technical and administrative activities (Administration, technical design and mechanics, electronics and microelectronics, computers and information technology, instrumentation, library, projects support and quality, health and safety); 3 - knowledge dissemination (teaching, training, seminars, valorisation, publications, conferences and scientific meetings); 4 - General information (permanent staff, organigram, research fellows, glossary)

  13. Development of Matlab GUI educational software to assist a laboratory of physical optics

    Science.gov (United States)

    Fernández, Elena; Fuentes, Rosa; García, Celia; Pascual, Inmaculada

    2014-07-01

    Physical optics is one of the subjects in the Grade of Optics and Optometry in Spanish universities. The students who come to this degree often have difficulties to understand subjects that are related to physics. For this reason, the aim of this work is to develop optics simulation software that provides a virtual laboratory for studying the effects of different aspects of physical optics phenomena. This software can let optical undergraduates simulate many optical systems for a better understanding of the practical competences associated with the theoretical concepts studied in class. This interactive environment unifies the information that brings the manual of the practices, provides the visualization of the physical phenomena and allows users to vary the values of the parameters that come into play to check its effect. So, this virtual tool is the perfect complement to learning more about the practices developed in the laboratory. This software will be developed through the choices which have the Matlab to generate Graphical User Interfaces or GUIs. A set of knobs, buttons and handles will be included in the GUI's in order to control the parameters of the different physics phenomena. Graphics can also be inserted in the GUIs to show the behavior of such phenomena. Specifically, by using this software, the student is able to analyze the behaviour of the transmittance and reflectance of the TE and TM modes, the polarized light through of the Malus'Law or degree of polarization.

  14. Princeton Plasma Physics Laboratory. Annual report, October 1, 1989--September 30, 1990

    Energy Technology Data Exchange (ETDEWEB)

    1990-12-31

    This report discusses the following topics: principal parameters achieved in experimental devices fiscal year 1990; tokamak fusion test reactor; compact ignition tokamak; Princeton beta experiment- modification; current drive experiment-upgrade; international collaboration; x-ray laser studies; spacecraft glow experiment; plasma processing: deposition and etching of thin films; theoretical studies; tokamak modeling; international thermonuclear experimental reactor; engineering department; project planning and safety office; quality assurance and reliability; technology transfer; administrative operations; PPPL patent invention disclosures for fiscal year 1990; graduate education; plasma physics; graduate education: plasma science and technology; science education program; and Princeton Plasma Physics Laboratory reports fiscal year 1990.

  15. Princeton University, Plasma Physics Laboratory annual report, October 1, 1988--September 30, 1989

    International Nuclear Information System (INIS)

    1989-01-01

    This report contains discussions on the following topics: principal parameters achieved in experimental devices (FY89); tokamak fusion test reactor; compact ignition tokamak; princeton beta experiment- modification; current drive experiment; international collaboration; x-ray laser studies; spacecraft glow experiment; plasma deposition and etching of thin films; theoretical studies; tokamak modeling; international thermonuclear experimental reactor; engineering department; project planning and safety office; quality assurance and reliability; technology transfer; administrative operations; PPPL patent invention disclosures for (FY89); graduate education: plasma physics; graduate education: plasma science and technology; and Princeton Plasmas Physics Laboratory Reports (FY89)

  16. Princeton University, Plasma Physics Laboratory annual report, October 1, 1988--September 30, 1989

    Energy Technology Data Exchange (ETDEWEB)

    1989-01-01

    This report contains discussions on the following topics: principal parameters achieved in experimental devices (FY89); tokamak fusion test reactor; compact ignition tokamak; princeton beta experiment- modification; current drive experiment; international collaboration; x-ray laser studies; spacecraft glow experiment; plasma deposition and etching of thin films; theoretical studies; tokamak modeling; international thermonuclear experimental reactor; engineering department; project planning and safety office; quality assurance and reliability; technology transfer; administrative operations; PPPL patent invention disclosures for (FY89); graduate education: plasma physics; graduate education: plasma science and technology; and Princeton Plasmas Physics Laboratory Reports (FY89).

  17. Princeton University, Plasma Physics Laboratory annual report, October 1, 1988--September 30, 1989

    Energy Technology Data Exchange (ETDEWEB)

    1989-12-31

    This report contains discussions on the following topics: principal parameters achieved in experimental devices (FY89); tokamak fusion test reactor; compact ignition tokamak; princeton beta experiment- modification; current drive experiment; international collaboration; x-ray laser studies; spacecraft glow experiment; plasma deposition and etching of thin films; theoretical studies; tokamak modeling; international thermonuclear experimental reactor; engineering department; project planning and safety office; quality assurance and reliability; technology transfer; administrative operations; PPPL patent invention disclosures for (FY89); graduate education: plasma physics; graduate education: plasma science and technology; and Princeton Plasmas Physics Laboratory Reports (FY89).

  18. Nuclear Physics Laboratory technical progress report, [August 15, 1991--October 1, 1992

    International Nuclear Information System (INIS)

    1992-01-01

    This report summarizes work carried out between August 15, 1991 and October 1, 1992 at the Nuclear Physics Laboratory of the University of Colorado, Boulder, under contracts DE-FG02-86ER-40269 and DE-FG02-87ER-40335 with the United States Department of Energy. These contracts support experimental and theoretical work in intermediate energy nuclear physics. The experimental program is very broadly based; it includes pion-nucleon and pion-nucleus studies at Los Alamos and TRIUMF inelastic pion scattering and charge exchange reactions at LAMPF, kaon-nucleus scattering at the AGS, and nucleon charge exchange at LAMPF/NTOF

  19. TECHNOLOGICAL COMPETENCE OF FUTURE ENGINEER: FORMATION AND DEVELOPMENT IN COMPUTER INTEGRATED LABORATORY WORKSHOP ON PHYSICS

    Directory of Open Access Journals (Sweden)

    Ihor S. Chernetskyi

    2013-12-01

    Full Text Available The article examines the category «technological competence» and the definition of its components according to the educational process. A structural and functional model of technological competence of future engineers through forms, means, methods and technologies of computer oriented laboratory work. Selected blocks and elements of the model in the course of a typical student laboratory work on the course of general physics. We consider the possibility of using some type of digital labs «Phywe», «Fourier» and modern electronic media (flash books to optimize laboratory work at the Technical University. The analysis of the future research of structural elements model of technological competence.

  20. LAPP - Annecy le Vieux Particle Physics Laboratory. Activity report 2004-2005

    International Nuclear Information System (INIS)

    Colas, Jacques; Decamp, Daniel; Berger, Nicole; Bugnazet, Eric; Decampt, Daniel; Minard, Marie-Noelle; Riva, Vanessa; Dromby, Gerard

    2006-01-01

    LAPP is a high energy physics laboratory founded in 1976 and is one of the 19 laboratories of IN2P3 (National Institute of Nuclear and particle physics), institute of CNRS (National Centre for Scientific Research). LAPP is joint research facility of the University Savoie Mont Blanc (USMB) and the CNRS. Research carried out at LAPP aims at understanding the elementary particles and the fundamental interactions between them as well as exploring the connections between the infinitesimally small and the unbelievably big. Among other subjects LAPP teams try to understand the origin of the mass of the particles, the mystery of dark matter and what happened to the anti-matter that was present in the early universe. LAPP researchers work in close contact with phenomenologist teams from LAPTh, a theory laboratory hosted in the same building. LAPP teams also work since several decades at understanding the neutrinos, those elementary almost massless particles with amazing transformation properties. They took part in the design and realization of several experiments. Other LAPP teams collaborate in experiments studying signals from the cosmos. This document presents the activities of the laboratory during the years 2004-2005: 1 - Presentation of LAPP organisation and operation; 2 - Experimental groups: ATLAS - A Toroidal LHC Apparatus; CMS - Compact Muon Solenoid; Linear collider R and D; Positronium Physics and positrons pulsed beam; BABAR - Symmetry study in the B-B-bar system; LHCb - The Large Hadron Collider beauty experiment; OPERA - Oscillation Project with Emulsion-tracking Apparatus; AMS - Alpha Magnetic Spectrometer; HESS - High Energy Stereoscopic System; VIRGO; MACFLY - Measurement of Air Cherenkov and Fluorescence Light Yield; 3 - Projects in partnership: LAVISta - Annecy le Vieux laboratory for vibration and stabilisation studies; Mesh node; Valorisation; 4 - Support to experiments: Electronics department, Computers department, Mechanics department, Administration

  1. Effects of the Physical Laboratory versus the Virtual Laboratory in Teaching Simple Electric Circuits on Conceptual Achievement and Attitudes Towards the Subject

    Science.gov (United States)

    Tekbiyik, Ahmet; Ercan, Orhan

    2015-01-01

    Current study examined the effects of virtual and physical laboratory practices on students' conceptual achievement in the subject of electricity and their attitudes towards simple electric circuits. Two groups (virtual and physical) selected through simple random sampling was taught with web-aided material called "Electricity in Our…

  2. Princeton Plasma Physics Laboratory Annual Site Environmental Report for Calendar Years 2002 and 2003

    International Nuclear Information System (INIS)

    Finley, Virginia L.

    2004-01-01

    This report provides the U.S. Department of Energy (DOE) and the public with information on the level of radioactive and non-radioactive pollutants (if any) that are added to the environment as a result of Princeton Plasma Physics Laboratory's (PPPL) operations. The results of the 2002 and 2003 environmental surveillance and monitoring program for PPPL are presented and discussed. The report also summarizes environmental initiatives, assessments, and programs that were undertaken in 2002 and 2003

  3. Kinetics and Photochemistry of Ruthenium Bisbipyridine Diacetonitrile Complexes: An Interdisciplinary Inorganic and Physical Chemistry Laboratory Exercise.

    Science.gov (United States)

    Rapp, Teresa L; Phillips, Susan R; Dmochowski, Ivan J

    2016-12-13

    The study of ruthenium polypyridyl complexes can be widely applied across disciplines in the undergraduate curriculum. Ruthenium photochemistry has advanced many fields including dye-sensitized solar cells, photoredox catalysis, light-driven water oxidation, and biological electron transfer. Equally promising are ruthenium polypyridyl complexes that provide a sterically bulky, photolabile moiety for transiently "caging" biologically active molecules. Photouncaging involves the use of visible (1-photon) or near-IR (2-photon) light to break one or more bonds between ruthenium and coordinated ligand(s), which can occur on short time scales and in high quantum yields. In this work we demonstrate the use of a model "caged" acetonitrile complex, Ru(2,2'-bipyridine) 2 (acetonitrile) 2 , or RuMeCN in an advanced synthesis and physical chemistry laboratory. Students made RuMeCN in an advanced synthesis laboratory course and performed UV-vis spectroscopy and electrochemistry. The following semester students investigated RuMeCN photolysis kinetics in a physical chemistry laboratory. These two exercises may also be combined to create a 2-week module in an advanced undergraduate laboratory course.

  4. Nuclear and high-energy physics laboratory - LPNHE. Activity report 2012-2014

    International Nuclear Information System (INIS)

    Balland, Christophe; Cossin, Isabelle; Giganti, Claudio; Hardin, Delphine; Lavergne, Laurence; Le Dortz, Olivier; Lenain, Jean-Philippe; Marchiori, Giovanni; Regnault, Nicolas; Varanda De-Sa, Vera; Daigremont, Jean-Jacques

    2015-01-01

    The LPNHE is a joint research unit (UMR 7585) of the National Institute of Nuclear Physics and Particle Physics (IN2P3), Institute of the National Centre for Scientific Research (CNRS), UPMC and Paris Diderot Paris 7. It hosts several research teams and technical services (computers, electronics, mechanical), and two support services (administration, logistics). The laboratory is engaged in several major experimental programs pursued in the framework of international collaborations with very large research facilities around the world, centers of particle accelerators and observatories. The research programs cover current issues in particle physics, astro-particle and cosmology. This report presents the activities of the laboratory during the years 2012-2014: 1 - Forewords; 2 - Highlights; 3 - Research: Masses and FUNDAMENTAL INTERACTIONS; Matter-antimatter asymmetry; Dark matter and dark energy; Cosmic radiation nature and origin; Publications, communications; 2 - Teaching, training, internships and PhDs; 3 - Competences and technical realisations (electronics and instrumentation, computers, mechanics, expertise, calculation and technical departments); 4 - Laboratory operation (organisation, partnerships, financial and human resources, permanent training, communication and library, health and safety, radiation protection, general services, staff); 5 - Scientific life and communication (seminars, meetings..)

  5. Nuclear and high-energy physics laboratory - LPNHE. Activity report 2008-2009

    International Nuclear Information System (INIS)

    Pain, Reynald; Guy, Julien; Toussenel, Francois; Laforge, Bertrand; Levy, Jean-Michel; Cossin, Isabelle; Cardot, Violaine

    2011-01-01

    The LPNHE is a joint research unit (UMR 7585) of the National Institute of Nuclear Physics and Particle Physics (IN2P3), Institute of the National Centre for Scientific Research (CNRS), UPMC and Paris Diderot Paris 7. It hosts several research teams and technical services (computers, electronics, mechanical), and two support services (administration, logistics). The laboratory is engaged in several major experimental programs pursued in the framework of international collaborations with very large research facilities around the world, centers of particle accelerators and observatories. The research programs cover current issues in particle physics, astro-particle and cosmology. This report presents the activities of the laboratory during the years 2008-2009: 1 - Forewords; 2 - Highlights; 3 - Research: Masses and FUNDAMENTAL INTERACTIONS; Matter-antimatter asymmetry; Dark matter and dark energy; Cosmic radiation nature and origin; Interdisciplinary activities; Publications, communications; Partnerships; 2 - Teaching, training, internships and PhDs; 3 - Competences and technical realisations (electronics and instrumentation, computers, mechanics departments, test facilities); 4 - Laboratory operation (organisation, financial and human resources, permanent training, communication and library, health and safety, general services, staff); 5 - Scientific life and communication (seminars, meetings..)

  6. Nuclear and high-energy physics laboratory - LPNHE. Activity report 2010-2012

    International Nuclear Information System (INIS)

    Pain, Reynald; Ghia, Piera L.; Lacour, Didier; Lavergne, Laurence; Billoir, Pierre; Cossin, Isabelle; Cardot, Violaine

    2012-01-01

    The LPNHE is a joint research unit (UMR 7585) of the National Institute of Nuclear Physics and Particle Physics (IN2P3), Institute of the National Centre for Scientific Research (CNRS), UPMC and Paris Diderot Paris 7. It hosts several research teams and technical services (computers, electronics, mechanical), and two support services (administration, logistics). The laboratory is engaged in several major experimental programs pursued in the framework of international collaborations with very large research facilities around the world, centers of particle accelerators and observatories. The research programs cover current issues in particle physics, astro-particle and cosmology. This report presents the activities of the laboratory during the years 2010-2012: 1 - Forewords; 2 - Highlights; 3 - Research: Masses and FUNDAMENTAL INTERACTIONS; Matter-antimatter asymmetry; Dark matter and dark energy; Cosmic radiation nature and origin; Publications, communications; 2 - Teaching, training, internships and PhDs; 3 - Competences and technical realisations (electronics and instrumentation, computers, mechanics departments, expertise and valorisation, conference participation, responsibilities); 4 - Laboratory operation (organisation, partnerships, financial and human resources, permanent training, communication and library, health and safety, radiation protection, general services, staff); 5 - Scientific life and communication (seminars, meetings..)

  7. Thermal desorption study of physical forces at the PTFE surface

    Science.gov (United States)

    Wheeler, D. R.; Pepper, S. V.

    1987-01-01

    Thermal desorption spectroscopy (TDS) of the polytetrafluoroethylene (PTFE) surface was successfully employed to study the possible role of physical forces in the enhancement of metal-PTFE adhesion by radiation. The thermal desorption spectra were analyzed without assumptions to yield the activation energy for desorption over a range of xenon coverage from less than 0.1 monolayer to more than 100 monolayers. For multilayer coverage, the desorption is zero-order with an activation energy equal to the sublimation energy of xenon. For submonolayer coverages, the order for desorption from the unirradiated PTFE surface is 0.73 and the activation energy for desorption is between 3.32 and 3.36 kcal/mol; less than the xenon sublimation energy. The effect of irradiation is to increase the activation energy for desorption to as high as 4 kcal/mol at low coverage.

  8. Princeton Plasma Physics Laboratory Annual Site Environmental Report for Calendar Year 1999

    Energy Technology Data Exchange (ETDEWEB)

    Virginia Finley

    2001-04-20

    The results of the 1999 environmental surveillance and monitoring program for the Princeton Plasma Physics Laboratory (PPPL) are presented and discussed. The purpose of this report is to provide the U.S. Department of Energy and the public with information on the level of radioactive and non-radioactive pollutants (if any) that are added to the environment as a result of PPPL's operations. The report also summarizes environmental initiatives, assessments, and programs that were undertaken in 1999. The Princeton Plasma Physics Laboratory has engaged in fusion energy research since 1951. The long-range goal of the U.S. Magnetic Fusion Energy Research Program is to create innovations to make fusion power a practical reality--an alternative energy source. 1999 marked the first year of National Spherical Torus Experiment (NSTX) operations and Tokamak Fusion Test Reactor (TFTR) dismantlement and deconstruction activities. A collaboration among fourteen national laboratories, universities, and research institutions, the NSTX is a major element in the U.S. Fusion Energy Sciences Program. It has been designed to test the physics principles of spherical torus (ST) plasmas. The ST concept could play an important role in the development of smaller, more economical fusion reactors. With its completion within budget and ahead of its target schedule, NSTX first plasma occurred on February 12, 1999. The 1999 performance of the Princeton Plasma Physics Laboratory was rated ''outstanding'' by the U.S. Department of Energy in the Laboratory Appraisal report issued early in 2000. The report cited the Laboratory's consistently excellent scientific and technological achievements, its successful management practices, and included high marks in a host of other areas including environmental management, employee health and safety, human resources administration, science education, and communications. Groundwater investigations continued under a voluntary

  9. Princeton Plasma Physics Laboratory Annual Site Environmental Report for Calendar Year 1999

    International Nuclear Information System (INIS)

    Finley, Virginia

    2001-01-01

    The results of the 1999 environmental surveillance and monitoring program for the Princeton Plasma Physics Laboratory (PPPL) are presented and discussed. The purpose of this report is to provide the U.S. Department of Energy and the public with information on the level of radioactive and non-radioactive pollutants (if any) that are added to the environment as a result of PPPL's operations. The report also summarizes environmental initiatives, assessments, and programs that were undertaken in 1999. The Princeton Plasma Physics Laboratory has engaged in fusion energy research since 1951. The long-range goal of the U.S. Magnetic Fusion Energy Research Program is to create innovations to make fusion power a practical reality--an alternative energy source. 1999 marked the first year of National Spherical Torus Experiment (NSTX) operations and Tokamak Fusion Test Reactor (TFTR) dismantlement and deconstruction activities. A collaboration among fourteen national laboratories, universities, and research institutions, the NSTX is a major element in the U.S. Fusion Energy Sciences Program. It has been designed to test the physics principles of spherical torus (ST) plasmas. The ST concept could play an important role in the development of smaller, more economical fusion reactors. With its completion within budget and ahead of its target schedule, NSTX first plasma occurred on February 12, 1999. The 1999 performance of the Princeton Plasma Physics Laboratory was rated ''outstanding'' by the U.S. Department of Energy in the Laboratory Appraisal report issued early in 2000. The report cited the Laboratory's consistently excellent scientific and technological achievements, its successful management practices, and included high marks in a host of other areas including environmental management, employee health and safety, human resources administration, science education, and communications. Groundwater investigations continued under a voluntary agreement with the New Jersey

  10. Laboratory of Corpuscular Physics - LPC Caen. 2012-2013 activity report

    International Nuclear Information System (INIS)

    2014-01-01

    The ENSICAEN (National Graduate School of Engineering) is an internationally renowned, pluri-disciplinary scientific research centre. Six of its seven laboratories are associated with the French National Centre of Scientific Research (CNRS), one of them also benefiting from the French Atomic and Renewable Energies (CEA) supervision. The Corpuscular Physics Laboratory (LPC) covers the following Research themes: Medical and industrial applications; upstream of the nuclear waste processing cycle; nuclear systems dynamics and thermodynamics; fundamental interactions; research on neutrinos; nuclei at the limits of stability; theoretical and phenomenological physics. This document is the 2012-2013 Activity report of the LPC-Caen. It presents the following activities: 1 - Nuclear Physics Research (Nuclear structure, Nuclear dynamics and thermodynamics, Theoretical physics and phenomenology); 2 - Interdisciplinary Research (Nuclear waste management, Medical and industrial applications); 3 - Group 'FUNDAMENTAL INTERACTIONS and Neutrino Nature - GRIFON (Precise correlation measurements in nuclear beta decay, High resolution study of low energy charge exchange collisions with a MOT (magneto-optical trapped) target, Towards a new measurement of the neutron Electric Dipole Moment (EDM), Search for neutrinoless double beta decay); 4 - Technical and administrative activities (technical design, mechanics, electronics and microelectronics, computers and information technology, instrumentation); library, program management and quality, health and safety); 5 - knowledge dissemination (teaching, training, valorisation, communication, conferences and scientific meetings); 6 - General information (permanent staff, organigram, research fellows, glossary)

  11. Activity-Based Introductory Physics Using Graphing Calculators and Calculator-Based Laboratories (CBLs)*

    Science.gov (United States)

    Trecia Markes, C.

    1998-04-01

    This paper will report on the development of an activity-based approach to teaching introductory physics that makes extensive use of the Calculator-Based Laboratory (CBL) system from Texas Instruments to collect and analyze data. Studies have suggested that an activity-based instruction format and computer-implemented data acquisition and analysis are effective in enhancing teaching effectiveness. However, implementation of this kind of class is accompanied by significant financial, spatial, and portability constraints. The TI-85/92 graphing calculators provide sufficient computational capacity and speed to handle most of the data acquisition and analysis requirements found in activity based introductory physics instruction. This paper will show how some physical laws can be derived from data obtained using the calculator/CBL system. Other data that can be easily obtained will also be shown and discussed. Results of pre-test and post-test given to both activity-based sections and lecture/laboratory sectioons of algebra-level introductory physics classes will also be discussed.

  12. Laboratory of Corpuscular Physics - LPC Caen. July 2005 - June 2007 activity report

    International Nuclear Information System (INIS)

    2008-01-01

    The ENSICAEN (National Graduate School of Engineering) is an internationally renowned, pluri-disciplinary scientific research centre. Six of its seven laboratories are associated with the French National Centre of Scientific Research (CNRS), one of them also benefiting from the French Atomic and Renewable Energies (CEA) supervision. The Corpuscular Physics Laboratory (LPC) covers the following Research themes: Medical and industrial applications; upstream of the nuclear waste processing cycle; nuclear systems dynamics and thermodynamics; fundamental interactions; research on neutrinos; nuclei at the limits of stability; theoretical and phenomenological physics. This document is the July 2005 - June 2007 Activity report of the LPC-Caen. It presents the following activities: 1 - Physics Research (Medical and industrial applications, Back-end of Nuclear waste management, Nuclear dynamics and thermodynamics, FUNDAMENTAL INTERACTIONS and Neutrino Nature, Theoretical physics and phenomenology, Nuclear structure); 2 - Technical and administrative activities (Administration, technical design and mechanics, electronics and detectors, computers and information technology, library, health and safety); 3 - knowledge dissemination (teaching, training, seminars, valorisation, publications, books, conferences and scientific meetings); 4 - General information (glossary, organigram, permanent staff, research fellows)

  13. Laboratory of Corpuscular Physics - LPC Caen. July 2003 - June 2005 activity report

    International Nuclear Information System (INIS)

    2006-01-01

    The ENSICAEN (National Graduate School of Engineering) is an internationally renowned, pluri-disciplinary scientific research centre. Six of its seven laboratories are associated with the French National Centre of Scientific Research (CNRS), one of them also benefiting from the French Atomic and Renewable Energies (CEA) supervision. The Corpuscular Physics Laboratory (LPC) covers the following Research themes: Medical and industrial applications; upstream of the nuclear waste processing cycle; nuclear systems dynamics and thermodynamics; fundamental interactions; research on neutrinos; nuclei at the limits of stability; theoretical and phenomenological physics. This document is the July 2003 - June 2005 Activity report of the LPC-Caen. It presents the following activities: 1 - Physics Research (Medical and industrial applications, Back-end of the fuel cycle, Nuclear dynamics and thermodynamics, FUNDAMENTAL INTERACTIONS and Neutrino Nature, Theoretical physics and phenomenology, Nuclear structure); 2 - Technical and administrative activities (Administration, technical design and mechanics, electronics and detectors, computers and information technology, library, health and safety); 3 - knowledge dissemination (teaching, training, seminars, valorisation, publications, books, conferences and scientific meetings); 4 - General information (glossary, organigram, permanent staff, research fellows)

  14. Combined surface acoustic wave and surface plasmon resonance measurement of collagen and fibrinogen layer physical properties

    Directory of Open Access Journals (Sweden)

    J.-M. Friedt

    2016-12-01

    Full Text Available We use an instrument combining optical (surface plasmon resonance and acoustic (Love mode surface acoustic wave device real-time measurements on a same surface for the identification of water content in collagen and fibrinogen protein layers. After calibration of the surface acoustic wave device sensitivity by copper electrodeposition and surfactant adsorption, the bound mass and its physical properties – density and optical index – are extracted from the complementary measurement techniques and lead to thickness and water ratio values compatible with the observed signal shifts. Such results are especially usefully for protein layers with a high water content as shown here for collagen on an hydrophobic surface. We obtain the following results: collagen layers include 70±20% water and are 16±3 to 19±3 nm thick for bulk concentrations ranging from 30 to 300 μg/ml. Fibrinogen layers include 50±10% water for layer thicknesses in the 6±1.5 to 13±2 nm range when the bulk concentration is in the 46 to 460 μg/ml range. Keywords: surface acoustic wave, surface plasmon resonance, collagen, fibrinogen, density, thickness

  15. LAPP - Annecy le Vieux Particle Physics Laboratory. Activity report 1996-1997

    International Nuclear Information System (INIS)

    Colas, Jacques; Minard, Marie-Noelle; Decamp, Daniel; Marion, Frederique; Drancourt, Cyril; Riva, Vanessa; Berger, Nicole; Bombar, Claudine; Dromby, Gerard

    2004-01-01

    LAPP is a high energy physics laboratory founded in 1976 and is one of the 19 laboratories of IN2P3 (National Institute of Nuclear and particle physics), institute of CNRS (National Centre for Scientific Research). LAPP is joint research facility of the University Savoie Mont Blanc (USMB) and the CNRS. Research carried out at LAPP aims at understanding the elementary particles and the fundamental interactions between them as well as exploring the connections between the infinitesimally small and the unbelievably big. Among other subjects LAPP teams try to understand the origin of the mass of the particles, the mystery of dark matter and what happened to the anti-matter that was present in the early universe. LAPP researchers work in close contact with phenomenologist teams from LAPTh, a theory laboratory hosted in the same building. LAPP teams also work since several decades at understanding the neutrinos, those elementary almost massless particles with amazing transformation properties. They took part in the design and realization of several experiments. Other LAPP teams collaborate in experiments studying signals from the cosmos. This document presents the activities of the laboratory during the years 1996-1997: 1 - Presentation of LAPP; 2 - Data acquisition experiments: e + e - annihilations at LEP (standard model and beyond the standard model - ALEPH, Study of hadronic final state events and Search for supersymmetric particles at L3 detector); Neutrino experiments (neutrino oscillation search at 1 km of the Chooz reactors, search for neutrino oscillations at the CERN Wide Band neutrino beam - NOMAD); Quarks-Gluons plasma; Hadronic spectroscopy; 3 - Experiments under preparation (CP violation study - BABAR, Anti Matter Spectrometer in Space - AMS, Search for gravitational waves - VIRGO, Search for the Higgs boson - ATLAS and CMS); 4 - Technical departments; 5 - Theoretical physics; 6 - Other activities

  16. Colloid and surface chemistry a laboratory guide for exploration of the nano world

    CERN Document Server

    Bucak, Seyda

    2013-01-01

    Scientific Research The research processEthics in Science Design of Experiments Fundamentals of Scientific Computing, Nihat Baysal Recording Data: Keeping a Good Notebook Presenting Data: Writing a Laboratory ReportReferencesCharacterization Techniques Surface Tension Measurements, Seyda BucakViscosity/Rheological Measurements, Patrick UnderhillElectrokinetic Techniques, Marek KosmulskiDiffraction (XRD), Deniz RendeScattering, Ulf OlssonMicroscopy, Cem Levent Altan and Nico A.J.M. SommerdijkColloids and Surfaces Experiment 1: SedimentationExperiment 2: Determination of Critical Micelle Concent

  17. Study on Microbial Deposition and Contamination onto Six Surfaces Commonly Used in Chemical and Microbiological Laboratories

    Directory of Open Access Journals (Sweden)

    Elena Tamburini

    2015-07-01

    Full Text Available The worktops in both chemical and microbiological laboratories are the surfaces most vulnerable to damage and exposure to contamination by indoor pollutants. The rate at which particles are deposited on indoor surfaces is an important parameter to determine human exposure to airborne biological particles. In contrast to what has been established for inorganic pollutants, no limit has been set by law for microbial contamination in indoor air. To our knowledge, a comparative study on the effect of surfaces on the deposition of microbes has not been carried out. An evaluation of the microbial contamination of worktop materials could be of crucial importance, both for safety reasons and for the reliability of tests and experiments that need to be carried out in non-contaminated environments. The aim of this study was to evaluate the overall microbial contamination (fungi, mesophilic and psychrophilic bacteria, staphylococci on six widely used worktop materials in laboratories (glass, stainless steel, fine porcelain stoneware, post-forming laminate, high-performing laminate and enamel steel and to correlate it with the characteristics of the surfaces. After cleaning, the kinetics of microbial re-contamination were also evaluated for all surfaces.

  18. SOFTWARE REVIEW: The Advanced Physics Virtual Laboratory Series: CD-ROM Thermodynamics and Molecular Physics

    Science.gov (United States)

    Dobson, Ken

    1998-09-01

    The program installed easily although the inexperienced might be as terrified as I was by the statements threatening to delete various files it had found on my machine. However, I ignored these and all went well. The user is faced with a menu of 14 simulations covering molecular topics such as the Kinetic Model of an Ideal Gas, Diffusion (through a variable diameter aperture) and a Semi-permeable Membrane, the Maxwell Distribution and Brownian Motion. Thermodynamics is covered by simulations of ideal-gas behaviour at constant pressure, volume and temperature. This is extended to deal with adiabatic changes, the work done by and on a gas, specific heats, work cycles, and to the behaviour of real gases in evaporation and condensation. Finally there are short video-clips of actual experiments showing gas and vapour behaviour. Each simulation is displayed in a `picture window' which gives a qualitative display of how molecules are moving in a container, or how a parameter changes as conditions are varied, as appropriate. Attached (somewhat loosely as it turned out) to these are relevant graphs showing how the important variables such as temperature, volume and pressure change as conditions are changed. The simulations are dynamic and set off by clicking on a RUN button. The simulation can be stopped at any stage and reset to change parameters. It is easy to change the conditions of the simulation by moving sliders along a scale. I particularly liked the simulations of molecular behaviour and the isotherms of a real gas - an ideal case for animation. Each simulation has a short spoken commentary which you can switch in, a brief drop-down text describing the simulation, and a single question. This is where, I felt, things started to go wrong. The simulation displays are informative and give a good visual impression of a part of physics that students find abstract and difficult. But the supporting commentary and text are much too thin for, say, `supported self

  19. Open-ended Laboratory Investigations in a High School Physics Course: The difficulties and rewards of implementing inquiry-based learning in a physics lab

    Science.gov (United States)

    Szott, Aaron

    2014-01-01

    often closed-ended. The outcomes are known in advance and students replicate procedures recommended by the teacher. Over the years, I have come to appreciate the great opportunities created by allowing students investigative freedom in physics laboratories. I have realized that a laboratory environment in which students are free to conduct investigations using procedures of their own design can provide them with varied and rich opportunities for discovery. This paper describes what open-ended laboratory investigations have added to my high school physics classes. I will provide several examples of open-ended laboratories and discuss the benefits they conferred on students and teacher alike.

  20. Asking the next generation: the implementation of pre-university students’ ideas about physics laboratory preparation exercises

    Science.gov (United States)

    Dunnett, K.; Bartlett, P. A.

    2018-01-01

    It was planned to introduce online pre-laboratory session activities to a first-year undergraduate physics laboratory course to encourage a minimum level of student preparation for experiments outside the laboratory environment. A group of 16 and 17 year old laboratory work-experience students were tasked to define and design a pre-laboratory activity based on experiments that they had been undertaking. This informed the structure, content and aims of the activities introduced to a first year physics undergraduate laboratory course, with the particular focus on practising the data handling. An implementation study showed how students could try to optimise high grades, rather than gain efficiency-enhancing experience if careful controls were not put in place by assessors. However, the work demonstrated that pre-university and first-year physics students can take an active role in developing scaffolding activities that can help to improve the performance of those that follow their footsteps.

  1. Factors in the Selection of Surface Disinfectants for Use in a Laboratory Animal Setting

    Science.gov (United States)

    Campagna, Michael V; Faure-Kumar, Emmanuelle; Treger, Janet A; Cushman, Jesse D; Grogan, Tristan R; Kasahara, Noriyuki; Lawson, Gregory W

    2016-01-01

    Because surface disinfectants are an important means of pathogen control within laboratory animal facilities, these products must have an appropriate spectrum of antimicrobial activity. However, many other factors must also be considered, including effects on human health, environmental safety, and animal behavior. Aqueous solutions of sodium hypochlorite often are considered to be the ‘gold standard’ for surface disinfection, but these products can be corrosive, caustic, and aversive in odor. This study was designed to identify disinfectants that are as effective as hypochlorite solutions but more acceptable for use in a laboratory animal setting. An antiviral disinfectant-efficacy assay was developed by using viral vectors that expressed green fluorescence protein as surrogates for wild-type viruses of concern in laboratory animals. Efficacy testing revealed that most of the products were highly effective when used against viral vectors in suspension. However, when the disinfectants were challenged by buffering virus in protein or drying virus on nonporous surfaces, the hypochlorite and peroxymonosulfate products performed the best. Review of safety data sheets for the agents indicated that a peroxide-based product was considerably safer than the other products tested and that the pH of most products was not conducive to disposal down a drain. Behavioral testing of Swiss Webster, C57Bl/6, and BALB/c mice showed that the hypochlorite- and peroxide-based products were clearly aversive, given that the mice consistently avoided these products. All of these factors must be considered when choosing the appropriate disinfectant. PMID:27025810

  2. Conditions for building a community of practice in an advanced physics laboratory

    Directory of Open Access Journals (Sweden)

    Paul W. Irving

    2014-03-01

    Full Text Available We use the theory of communities of practice and the concept of accountable disciplinary knowledge to describe how a learning community develops in the context of an upper-division physics laboratory course. The change in accountable disciplinary knowledge motivates students’ enculturation into a community of practice. The enculturation process is facilitated by four specific structural features of the course and supported by a primary instructional choice. The four structural features are “paucity of instructor time,” “all in a room together,” “long and difficult experiments,” and “same experiments at different times.” The instructional choice is the encouragement of the sharing and development of knowledge and understanding by the instructor. The combination of the instructional choice and structural features promotes the development of the learning community in which students engage in authentic practices of a physicist. This results in a classroom community that can provide students with the opportunity to have an accelerated trajectory towards being a more central participant of the community of a practice of physicists. We support our claims with video-based observations of laboratory classroom interactions and individual, semistructured interviews with students about their laboratory experiences and physics identity.

  3. Realizing a Framework for Enhancing the Laboratory Experiences of Non-Physics Majors: From Pilot to Large-Scale Implementation

    Science.gov (United States)

    Kirkup, Les; Pizzica, Jenny; Waite, Katrina; Srinivasan, Lakshmi

    2010-01-01

    Physics experiments for students not majoring in physics may have little meaning for those students and appear to them unconnected in any way to their majors. This affects student engagement and influences the extent to which they regard their experiences in the physics laboratory as positive. We apply a framework for the development and…

  4. Zero-Gravity Atmospheric Cloud Physics Experiment Laboratory engineering concepts/design tradeoffs. Volume 1: Study results

    Science.gov (United States)

    Greco, R. V.; Eaton, L. R.; Wilkinson, H. C.

    1974-01-01

    The work is summarized which was accomplished from January 1974 to October 1974 for the Zero-Gravity Atmospheric Cloud Physics Laboratory. The definition and development of an atmospheric cloud physics laboratory and the selection and delineation of candidate experiments that require the unique environment of zero gravity or near zero gravity are reported. The experiment program and the laboratory concept for a Spacelab payload to perform cloud microphysics research are defined. This multimission laboratory is planned to be available to the entire scientific community to utilize in furthering the basic understanding of cloud microphysical processes and phenomenon, thereby contributing to improved weather prediction and ultimately to provide beneficial weather control and modification.

  5. Merging physical parameters and laboratory subjective ratings for the soundscape assessment of urban squares.

    Science.gov (United States)

    Brambilla, Giovanni; Maffei, Luigi; Di Gabriele, Maria; Gallo, Veronica

    2013-07-01

    An experimental study was carried out in 20 squares in the center of Rome, covering a wide range of different uses, sonic environments, geometry, and architectural styles. Soundwalks along the perimeter of each square were performed during daylight and weekdays taking binaural and video recordings, as well as spot measurements of illuminance. The cluster analysis performed on the physical parameters, not only acoustic, provided two clusters that are in satisfactory agreement with the "a priori" classification. Applying the principal component analysis (PCA) to five physical parameters, two main components were obtained which might be associated to two environmental features, namely, "chaotic/calm" and "open/enclosed." On the basis of these two features, six squares were selected for the laboratory audio-video tests where 32 subjects took part filling in a questionnaire. The PCA performed on the subjective ratings on the sonic environment showed two main components which might be associated to two emotional meanings, namely, "calmness" and "vibrancy." The linear regression modeling between five objective parameters and the mean value of subjective ratings on chaotic/calm and enclosed/open attributes showed a good correlation. Notwithstanding these interesting results being limited to the specific data set, it is worth pointing out that the complexity of the soundscape quality assessment can be more comprehensively examined merging the field measurements of physical parameters with the subjective ratings provided by field and/or laboratory tests.

  6. Instructional designing the STEM education model for fostering creative thinking abilities in physics laboratory environment classes

    Science.gov (United States)

    Chanthala, Chumpon; Santiboon, Toansakul; Ponkham, Kamon

    2018-01-01

    To investigate the effects of students' activity-based on learning approaching management through the STEM Education Instructional Model for fostering their creative thinking abilities of their learning achievements in physics laboratory classroom environments with the sample size consisted of 48 students at the 10th grade level in two classes in Mahasarakham University Demonstration School(Secondary Division) in Thailand. Students' creative thinking abilities were assessed with the with the 24-item GuilfordCreative Thinking Questionnaire (GCTQ). Students' perceptions of their physics classroom learning environments were obtained using the 35-item Physics Laboratory Environment Inventory (PLEI). Associations between students' learning achievements of their post-test assessment indicated that 26% of the coefficient predictive value (R2) of the variance in students' creative thinking abilities was attributable to their perceptions for the GCTQ. Students' learning outcomes of their post-test assessment, the R2value indicated that 35% of the variances for the PLEI, the R2value indicated that 63% of the variances for their creative thinking abilities were attributable to theiraffecting the activity-based on learning for fostering their creative thinking are provided.

  7. Effectiveness of a GUM-compliant course for teaching measurement in the introductory physics laboratory

    International Nuclear Information System (INIS)

    Pillay, Seshini; Buffler, Andy; Lubben, Fred; Allie, Saalih

    2008-01-01

    An evaluation of a course aimed at developing university students' understanding of the nature of scientific measurement and uncertainty is described. The course materials follow the framework for metrology as recommended in the Guide to the Expression of Uncertainty in Measurement (GUM). The evaluation of the course is based on responses to written questionnaires administered to a cohort of 76 first year physics students both pre- and post-instruction, which were interpreted in terms of 'point' or 'set' reasoning. These findings are compared with responses from a control group of 70 students who completed a similar laboratory course apart from the use of traditional approaches to measurement and data analysis. The results suggest that the GUM framework, together with the specific teaching strategies described, provides opportunities for more effective learning of measurement and uncertainty in the introductory laboratory

  8. Bioelectrical impedance analysis as a laboratory activity: At the interface of physics and the body

    Science.gov (United States)

    Mylott, Elliot; Kutschera, Ellynne; Widenhorn, Ralf

    2014-05-01

    We present a novel laboratory activity on RC circuits aimed at introductory physics students in life-science majors. The activity teaches principles of RC circuits by connecting ac-circuit concepts to bioelectrical impedance analysis (BIA) using a custom-designed educational BIA device. The activity shows how a BIA device works and how current, voltage, and impedance measurements relate to bioelectrical characteristics of the human body. From this, useful observations can be made including body water, fat-free mass, and body fat percentage. The laboratory is engaging to pre-health and life-science students, as well as engineering students who are given the opportunity to observe electrical components and construction of a commonly used biomedical device. Electrical concepts investigated include alternating current, electrical potential, resistance, capacitance, impedance, frequency, phase shift, device design, and the use of such topics in biomedical analysis.

  9. Audiovisual physics reports: students' video production as a strategy for the didactic laboratory

    Science.gov (United States)

    Vinicius Pereira, Marcus; de Souza Barros, Susana; de Rezende Filho, Luiz Augusto C.; Fauth, Leduc Hermeto de A.

    2012-01-01

    Constant technological advancement has facilitated access to digital cameras and cell phones. Involving students in a video production project can work as a motivating aspect to make them active and reflective in their learning, intellectually engaged in a recursive process. This project was implemented in high school level physics laboratory classes resulting in 22 videos which are considered as audiovisual reports and analysed under two components: theoretical and experimental. This kind of project allows the students to spontaneously use features such as music, pictures, dramatization, animations, etc, even when the didactic laboratory may not be the place where aesthetic and cultural dimensions are generally developed. This could be due to the fact that digital media are more legitimately used as cultural tools than as teaching strategies.

  10. FEATURES OF TECHNOLOGIES CREATE INTERACTIVE ELECTRONIC DOCUMENT FOR SUPPORT OF LABORATORY PRACTICAL PHYSICS

    Directory of Open Access Journals (Sweden)

    Mykola A. Meleshko

    2014-02-01

    Full Text Available The article discusses the content of the «flash-book» construct, defining its properties and possible components. There are presented some examples of components programming steps of “authoring flash – book”, considered the possibility of using such an electronic document to optimize the learning process at the Technical University in the performance of laboratory training on general physics. The technique of its using to provide individualized approach to learning and the use of various experimental base from classical to digital equipment laboratories is proposed. It was carried out the analysis of ways to improve such interactive electronic document for the development of information technology competence of engineering students.

  11. Mars' surface radiation environment measured with the Mars Science Laboratory's Curiosity rover.

    Science.gov (United States)

    Hassler, Donald M; Zeitlin, Cary; Wimmer-Schweingruber, Robert F; Ehresmann, Bent; Rafkin, Scot; Eigenbrode, Jennifer L; Brinza, David E; Weigle, Gerald; Böttcher, Stephan; Böhm, Eckart; Burmeister, Soenke; Guo, Jingnan; Köhler, Jan; Martin, Cesar; Reitz, Guenther; Cucinotta, Francis A; Kim, Myung-Hee; Grinspoon, David; Bullock, Mark A; Posner, Arik; Gómez-Elvira, Javier; Vasavada, Ashwin; Grotzinger, John P

    2014-01-24

    The Radiation Assessment Detector (RAD) on the Mars Science Laboratory's Curiosity rover began making detailed measurements of the cosmic ray and energetic particle radiation environment on the surface of Mars on 7 August 2012. We report and discuss measurements of the absorbed dose and dose equivalent from galactic cosmic rays and solar energetic particles on the martian surface for ~300 days of observations during the current solar maximum. These measurements provide insight into the radiation hazards associated with a human mission to the surface of Mars and provide an anchor point with which to model the subsurface radiation environment, with implications for microbial survival times of any possible extant or past life, as well as for the preservation of potential organic biosignatures of the ancient martian environment.

  12. Mars' Surface Radiation Environment Measured with the Mars Science Laboratory's Curiosity Rover

    Science.gov (United States)

    Hassler, Donald M.; Zeitlin, Cary; Wimmer-Schweingruber, Robert F.; Ehresmann, Bent; Rafkin, Scot; Eigenbrode, Jennifer L.; Brinza, David E.; Weigle, Gerald; Böttcher, Stephan; Böhm, Eckart; Burmeister, Soenke; Guo, Jingnan; Köhler, Jan; Martin, Cesar; Reitz, Guenther; Cucinotta, Francis A.; Kim, Myung-Hee; Grinspoon, David; Bullock, Mark A.; Posner, Arik; Gómez-Elvira, Javier; Vasavada, Ashwin; Grotzinger, John P.; MSL Science Team; Kemppinen, Osku; Cremers, David; Bell, James F.; Edgar, Lauren; Farmer, Jack; Godber, Austin; Wadhwa, Meenakshi; Wellington, Danika; McEwan, Ian; Newman, Claire; Richardson, Mark; Charpentier, Antoine; Peret, Laurent; King, Penelope; Blank, Jennifer; Schmidt, Mariek; Li, Shuai; Milliken, Ralph; Robertson, Kevin; Sun, Vivian; Baker, Michael; Edwards, Christopher; Ehlmann, Bethany; Farley, Kenneth; Griffes, Jennifer; Miller, Hayden; Newcombe, Megan; Pilorget, Cedric; Rice, Melissa; Siebach, Kirsten; Stack, Katie; Stolper, Edward; Brunet, Claude; Hipkin, Victoria; Léveillé, Richard; Marchand, Geneviève; Sánchez, Pablo Sobrón; Favot, Laurent; Cody, George; Steele, Andrew; Flückiger, Lorenzo; Lees, David; Nefian, Ara; Martin, Mildred; Gailhanou, Marc; Westall, Frances; Israël, Guy; Agard, Christophe; Baroukh, Julien; Donny, Christophe; Gaboriaud, Alain; Guillemot, Philippe; Lafaille, Vivian; Lorigny, Eric; Paillet, Alexis; Pérez, René; Saccoccio, Muriel; Yana, Charles; Armiens-Aparicio, Carlos; Rodríguez, Javier Caride; Blázquez, Isaías Carrasco; Gómez, Felipe Gómez; Hettrich, Sebastian; Malvitte, Alain Lepinette; Jiménez, Mercedes Marín; Martínez-Frías, Jesús; Martín-Soler, Javier; Martín-Torres, F. Javier; Jurado, Antonio Molina; Mora-Sotomayor, Luis; Caro, Guillermo Muñoz; López, Sara Navarro; Peinado-González, Verónica; Pla-García, Jorge; Manfredi, José Antonio Rodriguez; Romeral-Planelló, Julio José; Fuentes, Sara Alejandra Sans; Martinez, Eduardo Sebastian; Redondo, Josefina Torres; Urqui-O'Callaghan, Roser; Mier, María-Paz Zorzano; Chipera, Steve; Lacour, Jean-Luc; Mauchien, Patrick; Sirven, Jean-Baptiste; Manning, Heidi; Fairén, Alberto; Hayes, Alexander; Joseph, Jonathan; Squyres, Steven; Sullivan, Robert; Thomas, Peter; Dupont, Audrey; Lundberg, Angela; Melikechi, Noureddine; Mezzacappa, Alissa; Berger, Thomas; Matthia, Daniel; Prats, Benito; Atlaskin, Evgeny; Genzer, Maria; Harri, Ari-Matti; Haukka, Harri; Kahanpää, Henrik; Kauhanen, Janne; Kemppinen, Osku; Paton, Mark; Polkko, Jouni; Schmidt, Walter; Siili, Tero; Fabre, Cécile; Wray, James; Wilhelm, Mary Beth; Poitrasson, Franck; Patel, Kiran; Gorevan, Stephen; Indyk, Stephen; Paulsen, Gale; Gupta, Sanjeev; Bish, David; Schieber, Juergen; Gondet, Brigitte; Langevin, Yves; Geffroy, Claude; Baratoux, David; Berger, Gilles; Cros, Alain; d'Uston, Claude; Forni, Olivier; Gasnault, Olivier; Lasue, Jérémie; Lee, Qiu-Mei; Maurice, Sylvestre; Meslin, Pierre-Yves; Pallier, Etienne; Parot, Yann; Pinet, Patrick; Schröder, Susanne; Toplis, Mike; Lewin, Éric; Brunner, Will; Heydari, Ezat; Achilles, Cherie; Oehler, Dorothy; Sutter, Brad; Cabane, Michel; Coscia, David; Israël, Guy; Szopa, Cyril; Dromart, Gilles; Robert, François; Sautter, Violaine; Le Mouélic, Stéphane; Mangold, Nicolas; Nachon, Marion; Buch, Arnaud; Stalport, Fabien; Coll, Patrice; François, Pascaline; Raulin, François; Teinturier, Samuel; Cameron, James; Clegg, Sam; Cousin, Agnès; DeLapp, Dorothea; Dingler, Robert; Jackson, Ryan Steele; Johnstone, Stephen; Lanza, Nina; Little, Cynthia; Nelson, Tony; Wiens, Roger C.; Williams, Richard B.; Jones, Andrea; Kirkland, Laurel; Treiman, Allan; Baker, Burt; Cantor, Bruce; Caplinger, Michael; Davis, Scott; Duston, Brian; Edgett, Kenneth; Fay, Donald; Hardgrove, Craig; Harker, David; Herrera, Paul; Jensen, Elsa; Kennedy, Megan R.; Krezoski, Gillian; Krysak, Daniel; Lipkaman, Leslie; Malin, Michael; McCartney, Elaina; McNair, Sean; Nixon, Brian; Posiolova, Liliya; Ravine, Michael; Salamon, Andrew; Saper, Lee; Stoiber, Kevin; Supulver, Kimberley; Van Beek, Jason; Van Beek, Tessa; Zimdar, Robert; French, Katherine Louise; Iagnemma, Karl; Miller, Kristen; Summons, Roger; Goesmann, Fred; Goetz, Walter; Hviid, Stubbe; Johnson, Micah; Lefavor, Matthew; Lyness, Eric; Breves, Elly; Dyar, M. Darby; Fassett, Caleb; Blake, David F.; Bristow, Thomas; DesMarais, David; Edwards, Laurence; Haberle, Robert; Hoehler, Tori; Hollingsworth, Jeff; Kahre, Melinda; Keely, Leslie; McKay, Christopher; Wilhelm, Mary Beth; Bleacher, Lora; Brinckerhoff, William; Choi, David; Conrad, Pamela; Dworkin, Jason P.; Floyd, Melissa; Freissinet, Caroline; Garvin, James; Glavin, Daniel; Harpold, Daniel; Jones, Andrea; Mahaffy, Paul; Martin, David K.; McAdam, Amy; Pavlov, Alexander; Raaen, Eric; Smith, Michael D.; Stern, Jennifer; Tan, Florence; Trainer, Melissa; Meyer, Michael; Voytek, Mary; Anderson, Robert C.; Aubrey, Andrew; Beegle, Luther W.; Behar, Alberto; Blaney, Diana; Calef, Fred; Christensen, Lance; Crisp, Joy A.; DeFlores, Lauren; Ehlmann, Bethany; Feldman, Jason; Feldman, Sabrina; Flesch, Gregory; Hurowitz, Joel; Jun, Insoo; Keymeulen, Didier; Maki, Justin; Mischna, Michael; Morookian, John Michael; Parker, Timothy; Pavri, Betina; Schoppers, Marcel; Sengstacken, Aaron; Simmonds, John J.; Spanovich, Nicole; Juarez, Manuel de la Torre; Webster, Christopher R.; Yen, Albert; Archer, Paul Douglas; Jones, John H.; Ming, Douglas; Morris, Richard V.; Niles, Paul; Rampe, Elizabeth; Nolan, Thomas; Fisk, Martin; Radziemski, Leon; Barraclough, Bruce; Bender, Steve; Berman, Daniel; Dobrea, Eldar Noe; Tokar, Robert; Vaniman, David; Williams, Rebecca M. E.; Yingst, Aileen; Lewis, Kevin; Leshin, Laurie; Cleghorn, Timothy; Huntress, Wesley; Manhès, Gérard; Hudgins, Judy; Olson, Timothy; Stewart, Noel; Sarrazin, Philippe; Grant, John; Vicenzi, Edward; Wilson, Sharon A.; Hamilton, Victoria; Peterson, Joseph; Fedosov, Fedor; Golovin, Dmitry; Karpushkina, Natalya; Kozyrev, Alexander; Litvak, Maxim; Malakhov, Alexey; Mitrofanov, Igor; Mokrousov, Maxim; Nikiforov, Sergey; Prokhorov, Vasily; Sanin, Anton; Tretyakov, Vladislav; Varenikov, Alexey; Vostrukhin, Andrey; Kuzmin, Ruslan; Clark, Benton; Wolff, Michael; McLennan, Scott; Botta, Oliver; Drake, Darrell; Bean, Keri; Lemmon, Mark; Schwenzer, Susanne P.; Anderson, Ryan B.; Herkenhoff, Kenneth; Lee, Ella Mae; Sucharski, Robert; Hernández, Miguel Ángel de Pablo; Ávalos, Juan José Blanco; Ramos, Miguel; Malespin, Charles; Plante, Ianik; Muller, Jan-Peter; Navarro-González, Rafael; Ewing, Ryan; Boynton, William; Downs, Robert; Fitzgibbon, Mike; Harshman, Karl; Morrison, Shaunna; Dietrich, William; Kortmann, Onno; Palucis, Marisa; Sumner, Dawn Y.; Williams, Amy; Lugmair, Günter; Wilson, Michael A.; Rubin, David; Jakosky, Bruce; Balic-Zunic, Tonci; Frydenvang, Jens; Jensen, Jaqueline Kløvgaard; Kinch, Kjartan; Koefoed, Asmus; Madsen, Morten Bo; Stipp, Susan Louise Svane; Boyd, Nick; Campbell, John L.; Gellert, Ralf; Perrett, Glynis; Pradler, Irina; VanBommel, Scott; Jacob, Samantha; Owen, Tobias; Rowland, Scott; Atlaskin, Evgeny; Savijärvi, Hannu; García, César Martín; Mueller-Mellin, Reinhold; Bridges, John C.; McConnochie, Timothy; Benna, Mehdi; Franz, Heather; Bower, Hannah; Brunner, Anna; Blau, Hannah; Boucher, Thomas; Carmosino, Marco; Atreya, Sushil; Elliott, Harvey; Halleaux, Douglas; Rennó, Nilton; Wong, Michael; Pepin, Robert; Elliott, Beverley; Spray, John; Thompson, Lucy; Gordon, Suzanne; Newsom, Horton; Ollila, Ann; Williams, Joshua; Vasconcelos, Paulo; Bentz, Jennifer; Nealson, Kenneth; Popa, Radu; Kah, Linda C.; Moersch, Jeffrey; Tate, Christopher; Day, Mackenzie; Kocurek, Gary; Hallet, Bernard; Sletten, Ronald; Francis, Raymond; McCullough, Emily; Cloutis, Ed; ten Kate, Inge Loes; Kuzmin, Ruslan; Arvidson, Raymond; Fraeman, Abigail; Scholes, Daniel; Slavney, Susan; Stein, Thomas; Ward, Jennifer; Berger, Jeffrey; Moores, John E.

    2014-01-01

    The Radiation Assessment Detector (RAD) on the Mars Science Laboratory's Curiosity rover began making detailed measurements of the cosmic ray and energetic particle radiation environment on the surface of Mars on 7 August 2012. We report and discuss measurements of the absorbed dose and dose equivalent from galactic cosmic rays and solar energetic particles on the martian surface for ~300 days of observations during the current solar maximum. These measurements provide insight into the radiation hazards associated with a human mission to the surface of Mars and provide an anchor point with which to model the subsurface radiation environment, with implications for microbial survival times of any possible extant or past life, as well as for the preservation of potential organic biosignatures of the ancient martian environment.

  13. Laboratory Studies on Surface Sampling of Bacillus anthracis Contamination: Summary, Gaps, and Recommendations

    Energy Technology Data Exchange (ETDEWEB)

    Piepel, Gregory F.; Amidan, Brett G.; Hu, Rebecca

    2011-11-28

    This report summarizes previous laboratory studies to characterize the performance of methods for collecting, storing/transporting, processing, and analyzing samples from surfaces contaminated by Bacillus anthracis or related surrogates. The focus is on plate culture and count estimates of surface contamination for swab, wipe, and vacuum samples of porous and nonporous surfaces. Summaries of the previous studies and their results were assessed to identify gaps in information needed as inputs to calculate key parameters critical to risk management in biothreat incidents. One key parameter is the number of samples needed to make characterization or clearance decisions with specified statistical confidence. Other key parameters include the ability to calculate, following contamination incidents, the (1) estimates of Bacillus anthracis contamination, as well as the bias and uncertainties in the estimates, and (2) confidence in characterization and clearance decisions for contaminated or decontaminated buildings. Gaps in knowledge and understanding identified during the summary of the studies are discussed and recommendations are given for future studies.

  14. Laboratory of Corpuscular Physics - LPC Caen / Laboratoire de Physique Corpusculaire - LPC Caen. Report 2010-2011

    International Nuclear Information System (INIS)

    2012-01-01

    This report covers the period 2010-11 and describes the work of the LPC Caen in the areas of basic and applied research (including technology transfer) and the educational activities, including public outreach, undertaken by the staff and students. The laboratory's activities over the last two years have been characterised by the upgrading of existing equipment and projects and the launching of new ones to be conducted at major facilities in the coming years. These projects involve physics with radioactive beams (GANIL/SPIRAL1, SPIRAL2, ISAC-TRIUMF and RIBF-RIKEN), neutron beams (NFS-SPIRAL2) and ultra-cold neutrons (PSI), the analysis of data from NEMO-3, the SuperNEMO project, nuclear waste processing (GUINEVERE) and the treatment of cancer by hadron-therapy (ARCHADE). Existing and new projects in theory and phenomenology have also been pursued with success. Beyond supporting the projects listed above, the laboratory's technical staff have lead our continued participation in the construction of the SPIRAL2 facility, as well as developing new electronics and a digital data acquisition system, along with the development of detectors for dosimetry in partnership with private industry. All of these activities have been ably supported by the laboratory's administrative service. Content: 1 - Research: Nuclear physics (Nuclear structure, Nuclear dynamics and thermodynamics, Theoretical physics and phenomenology); Interdisciplinary research (Nuclear waste management, Medical and industrial applications); Fundamental interactions (Neutrinoless double beta decay, Towards a new measurement of the neutron Electric Dipole Moment, Precise correlation measurements in nuclear beta decay, LPC Magneto-Optical Trap); 2 - Administration and technical departments (Administrative and general services, Design office and mechanical workshop, Electronics and microelectronics, Computing services, Instrumentation, Documentation, Quality assurance and project support, Health

  15. Subatomic Physics and Cosmology Laboratory - LPSC Grenoble. Activity report 2006-2007

    International Nuclear Information System (INIS)

    Berat, Corinne; Baylac, Maud; Cholat, Christine; Collot, Johann; Derome, Laurent; Kox, Serge; Lamy, Thierry; Pelletier, Jacques; Renault, Cecile; Real, Jean-Sebastien; Regairaz, William; Richard, Jean-Marc; Vernay, Emmanuelle; Favro, Christian

    2008-01-01

    The Grenoble Subatomic Physics and Cosmology Laboratory - LPSC aims to improve our knowledge about the most elementary particles and about the forces that govern their interactions. It helps to broaden our understanding of the universe, its structure and its evolution. The LPSC is a Mixed Teaching and Research Unit, affiliated to the National Nuclear and Particle Physics Institute (IN2P3), the National Institute of Universe Sciences (INSU) and the National Institute of Engineering Sciences and Systems (INSIS) from the National Centre for Scientific Research (CNRS), as well as to the Joseph Fourier University and the Grenoble National Polytechnique Institute. The LPSC also plays a significant role at the national level and is involved in several international scientific and technical projects. Fundamental research is the driving force of LPSC activities. Among the themes studied at the LPSC, some are focused on the greatest unsolved mysteries of the universe, e.g. the unification of forces, the origin of the mass of particles, the origin of the matter-antimatter asymmetry in the universe and the search for dark matter and energy. Research starts at the scales of the nuclei of atoms and even much smaller, where quantum and relativistic physics laws prevail. The goal here is to understand the characteristics of the most elementary building blocks of matter and their interactions, to study the limits of existence of atoms and to discover new states of nuclear matter, such as the quark-gluon plasma. Research also extends towards the infinitely large; the goal here is to understand the origin of the structures of the universe and the cosmic phenomena that take place, and to understand the characteristics of the very first stages of the universe, just after the Big Bang. The branches of physics at these two extremes are actually closely linked. Infinitely small-scale physics plays an essential role in the first moments of the universe. Particle physics and cosmology both

  16. Radioactivity decontamination of materials commonly used as surfaces in general-purpose radioisotope laboratories.

    Science.gov (United States)

    Leonardi, Natalia M; Tesán, Fiorella C; Zubillaga, Marcela B; Salgueiro, María J

    2014-12-01

    In accord with as-low-as-reasonably-achievable and good-manufacturing-practice concepts, the present study evaluated the efficiency of radioactivity decontamination of materials commonly used in laboratory surfaces and whether solvent spills on these materials affect the findings. Four materials were evaluated: stainless steel, a surface comprising one-third acrylic resin and two-thirds natural minerals, an epoxy cover, and vinyl-based multipurpose flooring. Radioactive material was eluted from a (99)Mo/(99m)Tc generator, and samples of the surfaces were control-contaminated with 37 MBq (100 μL) of this eluate. The same procedure was repeated with samples of surfaces previously treated with 4 solvents: methanol, methyl ethyl ketone, acetone, and ethanol. The wet radioactive contamination was allowed to dry and then was removed with cotton swabs soaked in soapy water. The effectiveness of decontamination was defined as the percentage of activity removed per cotton swab, and the efficacy of decontamination was defined as the total percentage of activity removed, which was obtained by summing the percentages of activity in all the swabs required to complete the decontamination. Decontamination using our protocol was most effective and most efficacious for stainless steel and multipurpose flooring. Moreover, treatment with common organic solvents seemed not to affect the decontamination of these surfaces. Decontamination of the other two materials was less efficient and was interfered with by the organic solvents; there was also great variability in the overall results obtained for these other two materials. In expanding our laboratory, it is possible for us to select those surface materials on which our decontamination protocol works best. © 2014 by the Society of Nuclear Medicine and Molecular Imaging, Inc.

  17. A VME-based data acquisition system for nuclear physics and detector laboratories

    International Nuclear Information System (INIS)

    Fan Ruirui; Liang Xiaohua; Meng Xiangcheng

    2012-01-01

    In this paper,we report a laboratory DAQ system based on VME bus, for applications in nuclear physics and the detector tests. It uses a commercial ADC card and a single board computer as a crate controller. They are based on the VME bus.The software is based on the ROOT framework. A canvas window is employed for online monitoring, and the acquired data are stored as Histograms in a ROOT file. The data acquisition speed can rea MB/s. A spectrum of 241 Am 59 keV γ-ray collected with a CdZnTe detector is shown to demonstrate the system. (authors)

  18. Princeton Plasma Physics Laboratory Annual Site Environmental Report for Calendar Year 1998

    Energy Technology Data Exchange (ETDEWEB)

    V. Finley

    2000-03-06

    The results of the 1998 environmental surveillance and monitoring program for the Princeton Plasma Physics Laboratory (PPPL) are presented and discussed. The purpose of this report is to provide the US Department of Energy and the public with information on the level of radioactive and non-radioactive pollutants, if any, that are added to the environment as a result of PPPL's operations. The report also summarizes environmental initiatives, assessments, and programs that were undertaken in 1998. One significant initiative is the Integrated Safety Management (ISM) program that embraces environment, safety, and health principles as one.

  19. Princeton Plasma Physics Laboratory (PPPL) annual site environmental report for calendar year 1991

    International Nuclear Information System (INIS)

    Finley, V.L.; Stencel, J.R.

    1992-11-01

    This report gives the results of the environmental activities and monitoring programs at the Princeton Plasma Physics Laboratory (PPPL) for CY91. The report is prepared to provide the US Department of Energy (DOE) and the public with information on the level of radioactive and nonradioactive pollutants, if any, added to the environment as a result of PPPL operations, as well as environmental initiatives, assessments, and programs. The objective of the Annual Site Environmental Report is to document evidence that DOE facility environmental protection programs adequately protect the environment and the public health

  20. Princeton Plasma Physics Laboratory (PPPL) annual site environmental report for Calendar Year 1992

    International Nuclear Information System (INIS)

    Finley, V.L.; Wieczorek, M.A.

    1994-03-01

    This report gives the results of the environmental activities and monitoring programs at the Princeton Plasma Physics Laboratory (PPPL) for CY92. The report is prepared to provide the US Department of Energy (DOE) and the public with information on the level of radioactive and nonradioactive pollutants, if any, added to the environment as a result of PPPL operations, as well as environmental initiatives, assessments, and programs. The objective of the Annual Site Environmental Report is to document evidence that DOE facility environmental protection programs adequately protect the environment and the public health

  1. Continuous Surface Rendering, Passing from CAD to Physical Representation

    Directory of Open Access Journals (Sweden)

    Mario Covarrubias

    2013-06-01

    Full Text Available This paper describes a desktop-mechatronic interface that has been conceived to support designers in the evaluation of aesthetic virtual shapes. This device allows a continuous and smooth free hand contact interaction on a real and developable plastic tape actuated by a servo-controlled mechanism. The objective in designing this device is to reproduce a virtual surface with a consistent physical rendering well adapted to designers' needs. The desktop-mechatronic interface consists in a servo-actuated plastic strip that has been devised and implemented using seven interpolation points. In fact, by using the MEC (Minimal Energy Curve Spline approach, a developable real surface is rendered taking into account the CAD geometry of the virtual shapes. In this paper, we describe the working principles of the interface by using both absolute and relative approaches to control the position on each single control point on the MEC spline. Then, we describe the methodology that has been implemented, passing from the CAD geometry, linked to VisualNastran in order to maintain the parametric properties of the virtual shape. Then, we present the co-simulation between VisualNastran and MATLAB/Simulink used for achieving this goal and controlling the system and finally, we present the results of the subsequent testing session specifically carried out to evaluate the accuracy and the effectiveness of the mechatronic device.

  2. FY93 Princeton Plasma Physics Laboratory. Annual report, October 1, 1992--September 30, 1993

    Energy Technology Data Exchange (ETDEWEB)

    1995-02-01

    This is the annual report from the Princeton Plasma Physics Laboratory for the period October 1, 1992 to September 30, 1993. The report describes work done on TFTR during the year, as well as preparatory to beginning of D-T operations. Design work is ongoing on the Tokamak Physics Experiment (TPX) which is to test very long pulse operations of tokamak type devices. PBX has come back on line with additional ion-Bernstein power and lower-hybrid current drive. The theoretical program is also described, as well as other small scale programs, and the growing effort in collaboration on international design projects on ITER and future collaborations at a larger scale.

  3. FY93 Princeton Plasma Physics Laboratory. Annual report, October 1, 1992--September 30, 1993

    International Nuclear Information System (INIS)

    1995-01-01

    This is the annual report from the Princeton Plasma Physics Laboratory for the period October 1, 1992 to September 30, 1993. The report describes work done on TFTR during the year, as well as preparatory to beginning of D-T operations. Design work is ongoing on the Tokamak Physics Experiment (TPX) which is to test very long pulse operations of tokamak type devices. PBX has come back on line with additional ion-Bernstein power and lower-hybrid current drive. The theoretical program is also described, as well as other small scale programs, and the growing effort in collaboration on international design projects on ITER and future collaborations at a larger scale

  4. Radiological, physical, and chemical characterization of transuranic wastes stored at the Idaho National Engineering Laboratory

    International Nuclear Information System (INIS)

    Apel, M.L.; Becker, G.K.; Ragan, Z.K.; Frasure, J.; Raivo, B.D.; Gale, L.G.; Pace, D.P.

    1994-03-01

    This document provides radiological, physical and chemical characterization data for transuranic radioactive wastes and transuranic radioactive and hazardous (i.e., mixed) wastes stored at the Idaho National Engineering Laboratory and considered for treatment under the Private Sector Participation Initiative Program (PSPI). Waste characterization data are provided in the form of INEL Waste Profile Sheets. These documents provide, for each content code, information on waste identification, waste description, waste storage configuration, physical/chemical waste composition, radionuclide and associated alpha activity waste characterization data, and hazardous constituents present in the waste. Information is provided for 139 waste streams which represent an estimated total volume of 39,380 3 corresponding to a total mass of approximately 19,000,000 kg. In addition, considerable information concerning alpha, beta, gamma, and neutron source term data specific to Rocky Flats Plant generated waste forms stored at the INEL are provided to assist in facility design specification

  5. Zeeman effect experiment with high-resolution spectroscopy for advanced physics laboratory

    Science.gov (United States)

    Taylor, Andrew S.; Hyde, Alexander R.; Batishchev, Oleg V.

    2017-08-01

    An experiment studying the physics underlying the Zeeman effect and the Paschen-Back effect is developed for an advanced physics laboratory. We have improved upon the standard Zeeman effect experiment by eliminating the Fabry-Perot etalon, so that virtually any emission line in the visible spectrum can be analyzed. The magnetic field is provided by neodymium magnets. Light emitted in the ˜1 T field is analyzed by a Czerny-Turner spectrograph equipped with medium-dispersion grating and small-pixel imaging CCD. A spectral resolution under 1 pm/pixel is achieved. The splitting of argon and helium lines is measured as a function of field strength. The proportionality of the splitting magnitude to the B-field strength and to λ 2 is demonstrated. The Bohr magneton is calculated and compared to the theoretical value.

  6. Institute of Geophysics and Planetary Physics at Lawrence Livermore National Laboratory: 1986 annual report

    International Nuclear Information System (INIS)

    Max, C.E.

    1987-01-01

    The purpose of the Institute of Geophysics and Planetary Physics (IGPP) at LLNL is to enrich the opportunities of University of California campus researchers by making available to them some of the Laboratory's unique facilities and expertise, and to broaden the scientific horizon of LLNL researchers by encouraging collaborative or interdisciplinary work with other UC scientists. The IGPP continues to emphasize three fields of research - geoscience, astrophysics, and high-pressure physics - each administered by a corresponding IGPP Research Center. Each Research Center coordinates the mini-grant work in its field, and also works with the appropriate LLNL programs and departments, which frequently can provide supplementary funding and facilities for IGPP projects. 62 refs., 18 figs., 2 tabs

  7. Radiological, physical, and chemical characterization of transuranic wastes stored at the Idaho National Engineering Laboratory

    Energy Technology Data Exchange (ETDEWEB)

    Apel, M.L.; Becker, G.K.; Ragan, Z.K.; Frasure, J.; Raivo, B.D.; Gale, L.G.; Pace, D.P.

    1994-03-01

    This document provides radiological, physical and chemical characterization data for transuranic radioactive wastes and transuranic radioactive and hazardous (i.e., mixed) wastes stored at the Idaho National Engineering Laboratory and considered for treatment under the Private Sector Participation Initiative Program (PSPI). Waste characterization data are provided in the form of INEL Waste Profile Sheets. These documents provide, for each content code, information on waste identification, waste description, waste storage configuration, physical/chemical waste composition, radionuclide and associated alpha activity waste characterization data, and hazardous constituents present in the waste. Information is provided for 139 waste streams which represent an estimated total volume of 39,380{sup 3} corresponding to a total mass of approximately 19,000,000 kg. In addition, considerable information concerning alpha, beta, gamma, and neutron source term data specific to Rocky Flats Plant generated waste forms stored at the INEL are provided to assist in facility design specification.

  8. Argonne National Laboratory, High Energy Physics Division: Semiannual report of research activities, July 1, 1986-December 31, 1986

    International Nuclear Information System (INIS)

    1987-01-01

    This paper discusses the research activity of the High Energy Physics Division at the Argonne National Laboratory for the period, July 1986-December 1986. Some of the topics included in this report are: high resolution spectrometers, computational physics, spin physics, string theories, lattice gauge theory, proton decay, symmetry breaking, heavy flavor production, massive lepton pair production, collider physics, field theories, proton sources, and facility development

  9. Institute of Geophysics and Planetary Physics, Lawrence Livermore National Laboratory, 1996 Annual Report

    Energy Technology Data Exchange (ETDEWEB)

    Ryerson, F. J., Institute of Geophysics and Planetary Physics

    1998-03-23

    The Institute of Geophysics and Planetary Physics (IGPP) is a Multicampus Research Unit of the University of California (UC). IGPP was founded in 1946 at UC Los Angeles with a charter to further research in the earth and planetary sciences and in related fields. The Institute now has branches at UC campuses in Los Angeles, San Diego, and Riverside, and at Los Alamos and Lawrence Livermore national laboratories. The University-wide IGPP has played an important role in establishing interdisciplinary research in the earth and planetary sciences. For example, IGPP was instrumental in founding the fields of physical oceanography and space physics, which at the time fell between the cracks of established university departments. Because of its multicampus orientation, IGPP has sponsored important interinstitutional consortia in the earth and planetary sciences. Each of the five branches has a somewhat different intellectual emphasis as a result of the interplay between strengths of campus departments and Laboratory programs. The IGPP branch at Lawrence Livermore National Laboratory (LLNL) was approved by the Regents of the University of California in 1982. IGPP-LLNL emphasizes research in seismology, geochemistry, cosmochemistry, and astrophysics. It provides a venue for studying the fundamental aspects of these fields, thereby complementing LLNL programs that pursue applications of these disciplines in national security and energy research. IGPP-LLNL is directed by Charles Alcock and was originally organized into three centers: Geosciences, stressing seismology; High-Pressure Physics, stressing experiments using the two-stage light-gas gun at LLNL; and Astrophysics, stressing theoretical and computational astrophysics. In 1994, the activities of the Center for High-Pressure Physics were merged with those of the Center for Geosciences. The Center for Geosciences, headed by Frederick Ryerson, focuses on research in geophysics and geochemistry. The Astrophysics Research

  10. Argonne National Laboratory High Energy Physics Division semiannual report of research activities, January 1, 1989--June 30, 1989

    Energy Technology Data Exchange (ETDEWEB)

    1989-01-01

    This paper discuss the following areas on High Energy Physics at Argonne National Laboratory: experimental program; theory program; experimental facilities research; accelerator research and development; and SSC detector research and development.

  11. Argonne National Laboratory High Energy Physics Division semiannual report of research activities, January 1, 1989--June 30, 1989

    International Nuclear Information System (INIS)

    1989-01-01

    This paper discuss the following areas on High Energy Physics at Argonne National Laboratory: experimental program; theory program; experimental facilities research; accelerator research and development; and SSC detector research and development

  12. Laboratory Assessment of the Infiltration Capacity Reduction in Clogged Porous Mixture Surfaces

    Directory of Open Access Journals (Sweden)

    Valerio C. Andrés-Valeri

    2016-08-01

    Full Text Available Permeable pavements have been used widely across the world to manage urban stormwater. The hydrological behaviour of permeable surfaces is a complex process affected by many factors, such as rainfall intensity, rainfall duration, pavement geometrical conditions, and clogging level of the permeable surface, amongst others. This laboratory study was carried out to assess the influence of clogging level and rainfall intensity on the infiltration capacity of porous mixture surfaces used in Permeable Pavement Systems (PPS. Porous Concrete (PC and Porous Asphalt (PA mixtures with different air void contents (15%, 20%, and 25% were subject to different clogging scenarios by using varying sediment loads (0, 500, and 1000 g/m2. Permeability experiments were carried out for each clogging scenario through a new rainfall simulator specially developed, tailored, and calibrated for the laboratory simulation of a wide range of rainfall events. Permeability measurements were taken under all different scenarios as a result of the combination of the different rainfall events (50, 100, and 150 mm/h simulated over the specimens of porous mixtures and the sediment loads applied to them. The results showed that the PC mixtures tested perform better than the PA ones in terms of infiltration capacity, showing less potential for clogging and being more easily cleaned by the wash-off produced by the simulated rainfall events.

  13. Summary report: Assessment of deep injection well associated surface soils at the Idaho National Engineering Laboratory

    Energy Technology Data Exchange (ETDEWEB)

    Pole, S.B.

    1993-01-01

    This report summarizes sampling activities and analytical results of the chemical and radiological content of surface soils from storm water retention basins and drainage ditches associated with eight deep injection wells at the Idaho National Engineering Laboratory. The results of the sampling effort were intended to support permitting of the injection wells by the State of Idaho Department of Water Resources. In August 1992, the surface soils associated with eight storm water retention basins and ditches were sampled. All samples were collected and analyzed in accordance with a written sampling and analysis plan. The samples were analyzed by an off-Site contract laboratory, and the results were compared to local and regional soil analytical data to determine the presence of contaminants. The results indicated that the surface soils from the storm water retention basins and ditches did not have concentrations of metals or radionuclides greater than the range of concentrations found in local and regional soils. Volatile organic compounds were below detection limits.

  14. Adsorption of Ten Microcystin Congeners to Common Laboratory-Ware Is Solvent and Surface Dependent

    Directory of Open Access Journals (Sweden)

    Stefan Altaner

    2017-04-01

    Full Text Available Cyanobacteria can produce heptapetides called microcystins (MC which are harmful to humans due to their ability to inhibit cellular protein phosphatases. Quantitation of these toxins can be hampered by their adsorption to common laboratory-ware during sample processing and analysis. Because of their structural diversity (>100 congeners and different physico-chemical properties, they vary in their adsorption to surfaces. In this study, the adsorption of ten different MC congeners (encompassing non-arginated to doubly-arginated congeners to common laboratory-ware was assessed using different solvent combinations. Sample handling steps were mimicked with glass and polypropylene pipettes and vials with increasing methanol concentrations at two pH levels, before analysis by liquid chromatography-tandem mass spectrometry. We demonstrated that MC adsorb to polypropylene surfaces irrespective of pH. After eight successive pipet actions using polypropylene tips ca. 20% of the MC were lost to the surface material, which increased to 25%–40% when solutions were acidified. The observed loss was alleviated by changing the methanol (MeOH concentration in the final solvent. The required MeOH concentration varied depending on which congener was present. Microcystins only adsorbed to glass pipettes (loss up to 30% after eight pipet actions when in acidified aqueous solutions. The latter appeared largely dependent on the presence of ionizable groups, such as arginine residues.

  15. Energy Programs at the Johns Hopkins University Applied Physics Laboratory. Quarterly report, October-December 1979

    Energy Technology Data Exchange (ETDEWEB)

    None

    1979-12-01

    The Johns Hopkins University Applied Physics Laboratory, under contracts with several agencies of the federal government and an agency of the State of Maryland, is engaged in developing energy resources, utilization concepts, and storage methods. This Quarterly Report summarizes the work on the various tasks as of 31 December 1979. The Energy Quarterly Report is divided into five sections. The first, Geothermal Energy Development Planning and Technical Assistance, supported by the Department of Energy/Resource Applications (DOE/RA), contains reports on the progress of those geothermal-related tasks where effort was concentrated during the quarter. The second section, Operational Research, Hydroelectric Power Development, also supported by DOE/RA, contains reports on small-scale hydroelectric investigations in the southeastern states. The third section, Seismotectonic Studies, supported by the Reactor Safety Research Division of the Nuclear Regulatory Commission, reports on neotectonic investigations in Connecticut. The fourth section, Energy Conversion and Storage Techniques, contains two articles, the first on OTEC core unit testing supported by the Department of Energy, Division of Central Solar Technology (DOE/CST), and the second on recovery of landfill methane, supported by the Argonne National Laboratory. The fifth section, New Energy Technologies, reports on Laboratory studies of an unconventional gas source--Eastern Devonian shales.

  16. Princeton Plasma Physics Laboratory Annual Site Environmental Report for Calendar Year 1997

    Energy Technology Data Exchange (ETDEWEB)

    Finley, V.L. and Levine, J.D.

    1999-01-10

    The results of the 1997 environmental surveillance and monitoring program for the Princeton Plasma Physics Laboratory (PPPL) are presented and discussed. The purpose of this report is to provide the U.S. Department of Energy and the public with information on the level of radioactive and non-radioactive pollutants, if any, that are added to the environment as a result of PPPL's operations. During Calendar Year 1997, PPPL's Tokamak Fusion Test Reactor (TFTR) completed fifteen years of fusion experiments begun in 1982. Over the course of three and half years of deuterium-tritium (D-T) plasma experiments, PPPL set a world record of 10.7 million watts of controlled fusion power, more than 700 tritium shots pulsed into the reactor vessel generating more than 5.6 x 1020 neutron and 1.6 gigajoules of fusion energy and researchers studied plasma science experimental data, which included "enhanced reverse shear techniques." As TFTR was completing its historic operations, PPPL participated with the Oak Ridge National Laboratory, Columbia University, and the University of Washington (Seattle) in a collaboration effort to design the National Spherical Torus Experiment (NSTX). This next device, NSTX, is located in the former TFTR Hot Cell on D site, and it is designed to be a smaller and more economical torus fusion reactor. Construction of this device began in late 1997, and first plasma in scheduled for early 1999. For 1997, the U.S. Department of Energy in its Laboratory Appraisal report rated the overall performance of Princeton Plasma Physics Laboratory as "excellent." The report cited the Laboratory's consistently excellent scientific and technological achievements and its successful management practices, which included high marks for environmental management, employee health and safety, human resources administration, science education, and communications. Groundwater investigations continued under a voluntary agreement with the New Jersey

  17. Limits determination of microbial contamination present on surfaces from a pharmaceutical microbiology district reference laboratory

    Directory of Open Access Journals (Sweden)

    Natalia Charry

    2016-06-01

    Full Text Available Context: The bioburden present on the pharmaceutical microbiology laboratory’s surfaces, may increase the risk of cross-contamination when analytical tests are being carried out; periodic monitoring allows to set limits that reduce the risk. Aims: To determinate the limits of bioburden present on seven surfaces of the pharmaceutical microbiology laboratory, after the cleaning and disinfection process. Methods: The swabbing method was used for sampling. With a 25 cm2 stencil and a sterile swab, a sample was taken, passing the swab over five points of every surface chosen. A total aerobic microbial count and a total yeast and mold count was done. Finally, the average and the standard deviation of the counts was obtained. Results: The average from the counts obtained on each surface selected for the study, were below the recommended limits by international entities like the World Health Organization and the European Union, between others; also, the results generated in this study, allow to classify the biosafety cabinet as an ISO 5 area and the other areas as ISO 7. Conclusions: Bioburden levels on the tested surfaces are considered low, reducing the risk of cross-contamination, which could have a negative impact on laboratory’s activities. Also, it follows that disinfectant concentration used, is effectively.

  18. Surface Defects in Sheet Metal Forming: a Simulative Laboratory Device and Comparison with FE Analysis

    Science.gov (United States)

    Thuillier, Sandrine; Le Port, Alban; Manach, Pierre-Yves

    2011-08-01

    Surface defects are small concave imperfections that can develop during forming on outer convex panels of automotive parts like doors. They occur during springback steps, after drawing in the vicinity of bending over a curved line and flanging/hemming in the vicinity of the upper corner of a door. They can alter significantly the final quality of the automobile and it is of primary importance to deal with them as early as possible in the design of the forming tools. The aim of this work is to reproduce at the laboratory scale such a defect, in the case of the flanging along a curved edge, made of two orthogonal straight part of length 50 mm and joint by a curved line. A dedicated device has been designed and steel samples were tested. Each sample was measured initially (after laser cutting) and after flanging, with a 3D measuring machine. 2D profiles were extracted and the curvature was calculated. Surface defects were defined between points where the curvature sign changed. Isovalues of surface defect depth could then be plotted, thus displaying also the spatial geometry on the part surface. An experimental database has been created on the influence of process parameters like the flanging height and the flanging radius. Numerical simulations have been performed with the finite element code Abaqus to predict the occurrence of such surface defects and to analyze stress and strain distribution within the defect area.

  19. Overview of groundwater and surface water standards pertinent to the Idaho National Engineering Laboratory. Revision 3

    Energy Technology Data Exchange (ETDEWEB)

    Lundahl, A.L.; Williams, S.; Grizzle, B.J.

    1995-09-01

    This document presents an overview of groundwater- and surface water-related laws, regulations, agreements, guidance documents, Executive Orders, and DOE orders pertinent to the Idaho National Engineering Laboratory. This document is a summary and is intended to help readers understand which regulatory requirements may apply to their particular circumstances. However, the document is not intended to be used in lieu of applicable regulations. Unless otherwise noted, the information in this report reflects a summary and evaluation completed July 1, 1995. This document is considered a Living Document, and updates on changing laws and regulations will be provided.

  20. Decontamination of scientific and laboratory equipment with different materials and surface

    International Nuclear Information System (INIS)

    Kharita, M. H.; Khaito, M.; Wali, K.

    2003-01-01

    The process of decontamination of scientific and laboratory equipment is considered to be a very important scientific work with a good economical justification due to the expensive value of some of the contaminated equipment. This will lead to the rehabilitation of these equipment on one hand and decrease in volume of the radioactive waste on the other hand. The materials used for this process are cheap and widely available. The process developed and employed in this work showed a very good values for the decontamination factor for glass, metallic and plastic surfaces contaminated with different radioisotopes. (author)

  1. Subatomic Physics and Cosmology Laboratory - LPSC Grenoble. Activity report 2004-2005

    International Nuclear Information System (INIS)

    Chretien-Duhamel, G.; Baylac, M.; Billebaud, A.; Cholat, C.; Collot, J.; Comparat, V.; Derome, L.; Lamy, T.; Lucotte, A.; Ollivier, N.; Real, J.S.; Regairaz, W.; Richard, J.M.; Silvestre-Brac, B.; Stutz, A.; Tur, C.; Favro, C.

    2006-01-01

    The Grenoble Subatomic Physics and Cosmology Laboratory - LPSC aims to improve our knowledge about the most elementary particles and about the forces that govern their interactions. It helps to broaden our understanding of the universe, its structure and its evolution. The LPSC is a Mixed Teaching and Research Unit, affiliated to the National Nuclear and Particle Physics Institute (IN2P3), the National Institute of Universe Sciences (INSU) and the National Institute of Engineering Sciences and Systems (INSIS) from the National Centre for Scientific Research (CNRS), as well as to the Joseph Fourier University and the Grenoble National Polytechnique Institute. The LPSC also plays a significant role at the national level and is involved in several international scientific and technical projects. Fundamental research is the driving force of LPSC activities. Among the themes studied at the LPSC, some are focused on the greatest unsolved mysteries of the universe, e.g. the unification of forces, the origin of the mass of particles, the origin of the matter-antimatter asymmetry in the universe and the search for dark matter and energy. Research starts at the scales of the nuclei of atoms and even much smaller, where quantum and relativistic physics laws prevail. The goal here is to understand the characteristics of the most elementary building blocks of matter and their interactions, to study the limits of existence of atoms and to discover new states of nuclear matter, such as the quark-gluon plasma. Research also extends towards the infinitely large; the goal here is to understand the origin of the structures of the universe and the cosmic phenomena that take place, and to understand the characteristics of the very first stages of the universe, just after the Big Bang. The branches of physics at these two extremes are actually closely linked. Infinitely small-scale physics plays an essential role in the first moments of the universe. Particle physics and cosmology both

  2. Barium fluoride surface preparation, analysis and UV reflective coatings at Lawrence Livermore National Laboratory

    International Nuclear Information System (INIS)

    Wuest, C.R.

    1992-01-01

    Lawrence Livermore National Laboratory (LLNL) has begun a program of study on barium fluoride scintillating crystals for the Barium Fluoride Electromagnetic Calorimeter Collaboration. This program has resulted in a number of significant improvements in the mechanical processing, polishing and coating of barium fluoride crystals. Techniques have been developed using diamond-loaded pitch lapping that can produce 15 angstrom RMS surface finishes over large areas. These lapped surfaces have been shown to be crystalline using Rutherford Back-scattering (RBS). Also, special polishing fixtures have been designed based on mounting technology developed for the 1.1 m diameter optics used in LLNL's Nova Laser. These fixtures allow as many as five 25--50 cm long barium fluoride crystals to be polished and lapped at a time with the necessary tolerances for the 16,000 crystal Barium Fluoride Calorimeter. In addition, results will be presented on coating barium fluoride with UV reflective layers of magnesium fluoride and aluminum

  3. Princeton Plasma Physics Laboratory (PPPL) annual site environmental report for calendar year 1993

    Energy Technology Data Exchange (ETDEWEB)

    Finley, V.L.; Wiezcorek, M.A.

    1995-01-01

    This report gives the results of the environmental activities and monitoring programs at the Princeton Plasma Physics Laboratory (PPPL) for CY93. The report is prepared to provide the U.S. Department of Energy (DOE) and the public with information on the level of radioactive and non-radioactive pollutants, if any, added to the environment as a result of PPPL operations, as well as environmental initiatives, assessments, and programs that were undertaken in 1993. The objective of the Annual Site Environmental Report is to document evidence that DOE facility environmental protection programs adequately protect the environment and the public health. The Princeton Plasma Physics Laboratory has engaged in fusion energy research since 1951. The long-range goal of the U.S. Magnetic Fusion Energy Research Program is to develop and demonstrate the practical application of fusion power as an alternate energy source. In 1993, PPPL had both of its two large tokamak devices in operation; the Tokamak Fusion Test Reactor (TFTR) and the Princeton Beta Experiment-Modification (PBX-M). PBX-M completed its modifications and upgrades and resumed operation in November 1991. TFTR began the deuterium-tritium (D-T) experiments in December 1993 and set new records by producing over six million watts of energy. The engineering design phase of the Tokamak Physics Experiment (TPX), which replaced the cancelled Burning Plasma Experiment in 1992 as PPPL`s next machine, began in 1993 with the planned start up set for the year 2001. In 1993, the Environmental Assessment (EA) for the TFRR Shutdown and Removal (S&R) and TPX was prepared for submittal to the regulatory agencies.

  4. A Good Name and Great Riches: Rebranding Solid State Physics for the National Laboratories

    Science.gov (United States)

    Martin, Joseph

    2012-03-01

    In 1943 Oliver Buckley, lamenting the inadequacy of term ``physics'' to evoke what physicists did, quoted the proverb, ``A good name is rather to be chosen than great riches.'' Some forty years later, solid state physicists confronted similar discontent with their name, precipitating the rise of the appellation ``condensed matter physics.'' Ostensibly a rebranding of a well-established field, the change signaled deeper conceptual and institutional realignment. Whereas ``solid state'' emerged in the 1940s in the service of institutional aims, ``condensed matter'' more accurately captured a distinct set of theoretical and experimental approaches. Reimagining the field around core conceptual approaches set condensed matter apart from the inchoate field of materials science, which subsumed a growing proportion of solid state funding and personnel through the 1980s. Federally funded research installations were the source of ``great riches'' for scientific research. The DOE National Laboratory System and the DARPA network of Interdisciplinary Laboratories, given their responsiveness to shifts in national funding priorities, provide a sensitive historical instrument through which to trace the transition from solid state to condensed matter. The reorganization of solid state in response to the evolution of national priorities and funding practices precipitated a sharpening of the field's intellectual mission. At the same time, it reflected the difficulties solid state faced articulating its intellectual--as opposed to technological--merit. The proverb continues, `` and loving favor rather than silver and gold.'' The adoption of a name that emphasized intellectual cohesion and associated social esteem exposed the growing tension between technology-oriented national funding goals for materials research and condensed matter physics' ascendant intellectual identity.

  5. Princeton Plasma Physics Laboratory (PPPL) annual site environmental report for calendar year 1993

    International Nuclear Information System (INIS)

    Finley, V.L.; Wiezcorek, M.A.

    1995-01-01

    This report gives the results of the environmental activities and monitoring programs at the Princeton Plasma Physics Laboratory (PPPL) for CY93. The report is prepared to provide the U.S. Department of Energy (DOE) and the public with information on the level of radioactive and non-radioactive pollutants, if any, added to the environment as a result of PPPL operations, as well as environmental initiatives, assessments, and programs that were undertaken in 1993. The objective of the Annual Site Environmental Report is to document evidence that DOE facility environmental protection programs adequately protect the environment and the public health. The Princeton Plasma Physics Laboratory has engaged in fusion energy research since 1951. The long-range goal of the U.S. Magnetic Fusion Energy Research Program is to develop and demonstrate the practical application of fusion power as an alternate energy source. In 1993, PPPL had both of its two large tokamak devices in operation; the Tokamak Fusion Test Reactor (TFTR) and the Princeton Beta Experiment-Modification (PBX-M). PBX-M completed its modifications and upgrades and resumed operation in November 1991. TFTR began the deuterium-tritium (D-T) experiments in December 1993 and set new records by producing over six million watts of energy. The engineering design phase of the Tokamak Physics Experiment (TPX), which replaced the cancelled Burning Plasma Experiment in 1992 as PPPL's next machine, began in 1993 with the planned start up set for the year 2001. In 1993, the Environmental Assessment (EA) for the TFRR Shutdown and Removal (S ampersand R) and TPX was prepared for submittal to the regulatory agencies

  6. Princeton Plasma Physics Laboratory (PPPL) annual site environmental report for calendar year 1994

    Energy Technology Data Exchange (ETDEWEB)

    Finley, V.L.; Wieczorek, M.A. [eds.

    1996-02-01

    This report gives the results of the environmental activities and monitoring programs at the Princeton Plasma Physics Laboratory (PPPL) for CY94. The report is prepared to provide the US Department of Energy (DOE) and the public with information on the level of radioactive and nonradioactive pollutants, if any, added to the environment as a result of PPPL operations, as well as environmental initiatives, assessments, and programs that were undertaken in 1994. The objective of the Annual Site Environmental Report is to document evidence that PPPL`s environmental protection programs adequately protect the environment and the public health. The Princeton Plasma Physics Laboratory has engaged in fusion energy research since 195 1. The long-range goal of the US Magnetic Fusion Energy Research Program is to develop and demonstrate the practical application of fusion power as an alternate energy source. In 1994, PPPL had one of its two large tokamak devices in operation-the Tokamak Fusion Test Reactor (TFTR). The Princeton Beta Experiment-Modification or PBX-M completed its modifications and upgrades and resumed operation in November 1991 and operated periodically during 1992 and 1993; it did not operate in 1994 for funding reasons. In December 1993, TFTR began conducting the deuterium-tritium (D-T) experiments and set new records by producing over ten @on watts of energy in 1994. The engineering design phase of the Tokamak Physics Experiment (T?X), which replaced the cancelled Burning Plasma Experiment in 1992 as PPPL`s next machine, began in 1993 with the planned start up set for the year 2001. In December 1994, the Environmental Assessment (EA) for the TFTR Shutdown and Removal (S&R) and TPX was submitted to the regulatory agencies, and a finding of no significant impact (FONSI) was issued by DOE for these projects.

  7. Princeton Plasma Physics Laboratory (PPPL) annual site environmental report for calendar year 1994

    International Nuclear Information System (INIS)

    Finley, V.L.; Wieczorek, M.A.

    1996-02-01

    This report gives the results of the environmental activities and monitoring programs at the Princeton Plasma Physics Laboratory (PPPL) for CY94. The report is prepared to provide the US Department of Energy (DOE) and the public with information on the level of radioactive and nonradioactive pollutants, if any, added to the environment as a result of PPPL operations, as well as environmental initiatives, assessments, and programs that were undertaken in 1994. The objective of the Annual Site Environmental Report is to document evidence that PPPL's environmental protection programs adequately protect the environment and the public health. The Princeton Plasma Physics Laboratory has engaged in fusion energy research since 195 1. The long-range goal of the US Magnetic Fusion Energy Research Program is to develop and demonstrate the practical application of fusion power as an alternate energy source. In 1994, PPPL had one of its two large tokamak devices in operation-the Tokamak Fusion Test Reactor (TFTR). The Princeton Beta Experiment-Modification or PBX-M completed its modifications and upgrades and resumed operation in November 1991 and operated periodically during 1992 and 1993; it did not operate in 1994 for funding reasons. In December 1993, TFTR began conducting the deuterium-tritium (D-T) experiments and set new records by producing over ten at sign on watts of energy in 1994. The engineering design phase of the Tokamak Physics Experiment (T?X), which replaced the cancelled Burning Plasma Experiment in 1992 as PPPL's next machine, began in 1993 with the planned start up set for the year 2001. In December 1994, the Environmental Assessment (EA) for the TFTR Shutdown and Removal (S ampersand R) and TPX was submitted to the regulatory agencies, and a finding of no significant impact (FONSI) was issued by DOE for these projects

  8. Whistler wave propagation in the antenna near and far fields in the Naval Research Laboratory Space Physics Simulation Chamber

    International Nuclear Information System (INIS)

    Blackwell, David D.; Walker, David N.; Amatucci, William E.

    2010-01-01

    In previous papers, early whistler propagation measurements were presented [W. E. Amatucci et al., IEEE Trans. Plasma Sci. 33, 637 (2005)] as well as antenna impedance measurements [D. D. Blackwell et al., Phys. Plasmas 14, 092106 (2007)] performed in the Naval Research Laboratory Space Physics Simulation Chamber (SPSC). Since that time there have been major upgrades in the experimental capabilities of the laboratory in the form of improvement of both the plasma source and antennas. This has allowed access to plasma parameter space that was previously unattainable, and has resulted in measurements that provide a significantly clearer picture of whistler propagation in the laboratory environment. This paper presents some of the first whistler experimental results from the upgraded SPSC. Whereas previously measurements were limited to measuring the cyclotron resonance cutoff and elliptical polarization indicative of the whistler mode, now it is possible to experimentally plot the dispersion relation itself. The waves are driven and detected using balanced dipole and loop antennas connected to a network analyzer, which measures the amplitude and phase of the wave in two dimensions (r and z). In addition the frequency of the signals is also swept over a range of several hundreds of megahertz, providing a comprehensive picture of the near and far field antenna radiation patterns over a variety of plasma conditions. The magnetic field is varied from a few gauss to 200 G, with the density variable over at least 3 decades from 10 7 to 10 10 cm -3 . The waves are shown to lie on the dispersion surface for whistler waves, with observation of resonance cones in agreement with theoretical predictions. The waves are also observed to propagate without loss of amplitude at higher power, a result in agreement with previous experiments and the notion of ducted whistlers.

  9. Target Laboratory

    Data.gov (United States)

    Federal Laboratory Consortium — [Part of the ATLAS user facility.] The Physics Division operates a target development laboratory that produces targets and foils of various thickness and substrates,...

  10. Pacific Northwest Laboratory annual report for 1993 to the DOE Office of Energy Research. Part 4: Physical sciences

    Energy Technology Data Exchange (ETDEWEB)

    Braby, L.A.

    1994-08-01

    Part 4 of the Pacific Northwest Laboratory Annual Report for 1993 to the DOE Office of Energy Research includes those programs funded under the title ``Physical and Technological Research.`` The Field Task Program Studies reported in this document are grouped by budget category. Attention is focused on the following subject areas: dosimetry research; and radiological and chemical physics.

  11. Princeton Plasma Physics Laboratory Annual Site Environmental Report for Calendar Year 1996

    Energy Technology Data Exchange (ETDEWEB)

    J.D. Levine; V.L. Finley

    1998-03-01

    The results of the 1996 environmental surveillance and monitoring program for the Princeton Plasma Physics Laboratory (PPPL) are presented and discussed. The purpose of this report is to provide the US Department of Energy and the public with information on the level of radioactive and nonradioactive pollutants, if any, that are added to the environment as a result of PPPL's operations. During Calendar Year 1996, PPPL's Tokamak Fusion Test Reactor (TFTR) continued to conduct fusion experiments. Having set a world record on November 2, 1994, by achieving approximately 10.7 million watts of controlled fusion power during the deuterium-tritium (D-T) plasma experiments, researchers turned their attention to studying plasma science experiments, which included ''enhanced reverse shear techniques.'' Since November 1993, more than 700 tritium-fueled experiments were conducted, which generated more than 4 x 10(superscript 20) neutrons and 1.4 gigajoules of fusion energy. In 1996, the overall performance of Princeton Plasma Physics Laboratory was rated ''excellent'' by the US Department of Energy in the Laboratory Appraisal report issued in early 1997. The report cited the Laboratory's consistently excellent scientific and technological achievements and its successful management practices, which included high marks for environmental management, employee health and safety, human resources administration, science education, and communications. Groundwater investigations continued under a voluntary agreement with the New Jersey Department of Environmental Protection. PPPL monitored for the presence of nonradiological contaminants, mainly volatile organic compounds (components of degreasing solvents) and petroleum hydrocarbons (past leaks of releases of diesel fuel from underground storage tanks). Also, PPPL's radiological monitoring program characterized the ambient, background levels of tritium in the environment and

  12. New laboratory methods to study tooth surface coverage and interproximal plaque control by dentifrice products.

    Science.gov (United States)

    Xu, Tao; Herles, Susan M; Barnes, Virginia M

    2004-01-01

    To develop and test an in vitro tooth model for use in conjunction with laboratory methods to study interproximal effects and efficacy of dentifrices. The application of the model should offer visual evaluation of dentifrice coverage of the tooth surface, and measure dental plaque control at posterior interdental spaces with a dentifrice. The dentifrice products tested with the model were: Colgate Total 2 in 1 Toothpaste and Mouthwash (CTTM), Colgate Total dentifrice (CTD), and Colgate Regular dentifrice (CRD). Extracted human posterior teeth were disinfected, cleaned, aligned, and mounted in denture acrylic. In the area coverage method, tooth surface coverage and penetration of two different forms of dentifrice products (CTTM and CRD) were compared using digital photography. In the interproximal plaque control method, the teeth were coated with human saliva and incubated anaerobically with a mixture of representative oral bacteria for six hours at 37 degrees C. In vitro dental plaque was assessed after brushing the facial surface with one of the three dentifrice products using a clinical plaque scoring index. The area coverage method demonstrated that both dentifrice products tested covered approximately 70% of the facial tooth surface; the CTTM dentifrice coverage on the lingual tooth surface was significantly higher than the coverage for the CRD dentifrice. With the interproximal plaque control method, in the presence of an active ingredient, the CTTM dentifrice had equivalent efficacy to the CTD dentifrice. Both CTTM and CTD were significantly superior to the CRD for interproximal dental plaque control. Using the developed tooth model, two assessment methods have been shown to have the potential to demonstrate tooth surface coverage, and to assess the potential efficacy of a dentifrice for the control of interproximal dental plaque. This process can indicate potential clinical evaluation of an oral care product, and support clinical findings with controlled

  13. Effects of physical randomness training on virtual and laboratory golf putting performance in novices.

    Science.gov (United States)

    Pataky, T C; Lamb, P F

    2017-10-09

    External randomness exists in all sports but is perhaps most obvious in golf putting where robotic putters sink only 80% of 5 m putts due to unpredictable ball-green dynamics. The purpose of this study was to test whether physical randomness training can improve putting performance in novices. A virtual random-physics golf-putting game was developed based on controlled ball-roll data. Thirty-two subjects were assigned a unique randomness gain (RG) ranging from 0.1 to 2.0-times real-world randomness. Putter face kinematics were measured in 5 m laboratory putts before and after five days of virtual training. Performance was quantified using putt success rate and "miss-adjustment correlation" (MAC), the correlation between left-right miss magnitude and subsequent right-left kinematic adjustments. Results showed no RG-success correlation (r = -0.066, p = 0.719) but mildly stronger correlations with MAC for face angle (r = -0.168, p = 0.358) and clubhead path (r = -0.302, p = 0.093). The strongest RG-MAC correlation was observed during virtual training (r = -0.692, p physical randomness in virtual training, and also that this learning may weakly transfer to real golf putting kinematics. Adaptation to external physical randomness during virtual training may therefore help golfers adapt to external randomness in real-world environments.

  14. Subatomic Physics and Cosmology Laboratory - LPSC Grenoble. Activity report 2014-2015

    International Nuclear Information System (INIS)

    Bouly, Frederic; Combet, Celine; Gomez Martinez, Yolanda; Smith, Christopher; Dauvergne, Denis; Delorieux, Colette; Derome, Laurent; Furget, Christophe; Lacoste, Ana; Lamy, Thierry; Lamberterie, Pierre de; Ledroit, Fabienne; Lucotte, Arnaud; Macias Perez, Juan Francisco; Montanet, Francois; Rebreyend, Dominique; Sage, Christophe; Santos, Daniel; Simpson, Gary; Vernay, Emmanuelle; Favro, Christian

    2016-06-01

    The Grenoble Subatomic Physics and Cosmology Laboratory - LPSC aims to improve our knowledge about the most elementary particles and about the forces that govern their interactions. It helps to broaden our understanding of the universe, its structure and its evolution. The LPSC is a Mixed Teaching and Research Unit, affiliated to the National Nuclear and Particle Physics Institute (IN2P3), the National Institute of Universe Sciences (INSU) and the National Institute of Engineering Sciences and Systems (INSIS) from the National Centre for Scientific Research (CNRS), as well as to the Joseph Fourier University and the Grenoble National Polytechnique Institute. The LPSC also plays a significant role at the national level and is involved in several international scientific and technical projects. Fundamental research is the driving force of LPSC activities. Among the themes studied at the LPSC, some are focused on the greatest unsolved mysteries of the universe, e.g. the unification of forces, the origin of the mass of particles, the origin of the matter-antimatter asymmetry in the universe and the search for dark matter and energy. Research starts at the scales of the nuclei of atoms and even much smaller, where quantum and relativistic physics laws prevail. The goal here is to understand the characteristics of the most elementary building blocks of matter and their interactions, to study the limits of existence of atoms and to discover new states of nuclear matter, such as the quark-gluon plasma. Research also extends towards the infinitely large; the goal here is to understand the origin of the structures of the universe and the cosmic phenomena that take place, and to understand the characteristics of the very first stages of the universe, just after the Big Bang. The branches of physics at these two extremes are actually closely linked. Infinitely small-scale physics plays an essential role in the first moments of the universe. Particle physics and cosmology both

  15. Upgrade of detectors of neutron instruments at Neutron Physics Laboratory in Řež

    Energy Technology Data Exchange (ETDEWEB)

    Litvinenko, E.I., E-mail: litvin@nf.jinr.ru [Frank Laboratory of Neutron Physics, Joint Institute for Nuclear Research, 14980 Dubna (Russian Federation); Ryukhtin, V. [Nuclear Physics Institute of the CAS v.v.i., Řež 130, 250 68 Řež (Czech Republic); Bogdzel, A.A.; Churakov, A.V. [Frank Laboratory of Neutron Physics, Joint Institute for Nuclear Research, 14980 Dubna (Russian Federation); Farkas, G. [Charles University in Prague, Department of Physics of Material, Ke Karlovu 5, CZ-12116 Prague (Czech Republic); Hervoches, Ch.; Lukas, P. [Nuclear Physics Institute of the CAS v.v.i., Řež 130, 250 68 Řež (Czech Republic); Pilch, J. [Nuclear Physics Institute of the CAS v.v.i., Řež 130, 250 68 Řež (Czech Republic); Institute of Physics, Czech Academy of Sciences, Na Slovance 1992/2, 1822 Prague (Czech Republic); Saroun, J.; Strunz, P. [Nuclear Physics Institute of the CAS v.v.i., Řež 130, 250 68 Řež (Czech Republic); Zhuravlev, V.V. [Frank Laboratory of Neutron Physics, Joint Institute for Nuclear Research, 14980 Dubna (Russian Federation)

    2017-01-01

    Three neutron instruments at the Neutron Physics Laboratory (NPL) in Řež near Prague — small-angle scattering (SANS) MAUD, strain scanner SPN-100 and strain diffractometer TKSN-400 — have been modernized recently with new 2D position-sensitive detectors (PSDs) from JINR, Dubna. Here we report on the progress made in relation to the possibilities of the diffractometers due to the improved performance of the detectors. The first part of the paper is dedicated to a detailed description of the hardware and software of the PSDs, as well as its integration with the in-house experimental control software. Then practical examples of neutron scattering experiments for each of the upgraded facilities are presented.

  16. Mean glandular dose measurement on various breast phantom using mammography machine in MINT Medical Physics Laboratory

    International Nuclear Information System (INIS)

    Wan Hazlinda Ismail; Asmaliza Hashim; Abd Aziz Mhd Ramli

    2005-01-01

    Until recently, mammography have been the primary means of detecting early breast cancer. Although there is a risk of radiation- induced carcinogenesis associated with the x-ray examination of the female breast, but this risk is small compared to its benefits with modern equipment and technique. Therefore, it is important to determine the dose of the tissue at risk from radiation exposure by measuring the mean glandular dose (MGD). This can help minimize the risk to the patient. This paper describe the MGD measurement done on various types and thickness of breast phantom using a Bennett mammography machine model DMF-150 in the Medical Physics laboratory at the Malaysian Institute for Nuclear Technology Research (MINT). Results of this study are discussed in this paper. (Author)

  17. Long term indoor radon measurements in the pelletron laboratory at the UNAM physics institute

    Energy Technology Data Exchange (ETDEWEB)

    Espinosa, G.; Golzarri, J. I.; Lopez, K.; Rickards, J., E-mail: espinosa@fisica.unam.m [UNAM, Instituto de Fisica, Apdo. Postal 20-364, 01000 Mexico D. F. (Mexico)

    2011-02-15

    The results of six months of continuous measurement of the indoor radon concentration levels in the building where the Physics Institute 3 MV Pelletron particle accelerator is located are presented. This study has three major objectives: a) to know the actual values of the levels of indoor radon in this installation, where personnel spend many hours and sometimes days; b) assess the radiological risk from radon inhalation for personnel working permanently in the laboratory, as well as incidental users; and c) establish, if necessary, time limits for continuous permanence on the location for indoor radon exposure. Passive nuclear track detectors and dynamic systems were employed, covering six months (August, 2009 to January, 2010). For the calculation of internal dose the Radon Individual Dose Calculator was used. The results indicate that the indoor radon levels are below the US EPA recommended levels (400 Bq/m{sup 3}) in workplaces. The measurements help to establish levels for workplaces in Mexico. (Author)

  18. Interactions between spacecraft motions and the atmospheric cloud physics laboratory experiments

    Science.gov (United States)

    Anderson, B. J.

    1981-01-01

    In evaluating the effects of spacecraft motions on atmospheric cloud physics laboratory (ACPL) experimentation, the motions of concern are those which will result in the movement of the fluid or cloud particles within the experiment chambers. Of the various vehicle motions and residual forces which can and will occur, three types appear most likely to damage the experimental results: non-steady rotations through a large angle, long-duration accelerations in a constant direction, and vibrations. During the ACPL ice crystal growth experiments, the crystals are suspended near the end of a long fiber (20 cm long by 200 micron diameter) of glass or similar material. Small vibrations of the supported end of the fiber could cause extensive motions of the ice crystal, if care is not taken to avoid this problem.

  19. Some recent advances of shock wave physics research at the Laboratory for Shock Wave and Detonation Physics Research

    CERN Document Server

    Jing Fu Qian

    2002-01-01

    Progress made in recent years on three topics that have been investigated at the Laboratory for Shock Wave and Detonation Physics Research are presented in this report. (1) A new equation of state (EOS) has been derived which can be used from a standard state to predict state variable change along an isobaric path. Good agreements between calculations for some representative metals using this new EOS and experiments have been found, covering a wide range from hundreds of MPa to hundreds of GPa and from ambient temperature to tens of thousands of GPa. (2) An empirical relation of Y/G = constant (Y is yield strength, G is shear modulus) at HT-HP has been reinvestigated and confirmed by shock wave experiment. 93W alloy was chosen as a model material. The advantage of this relation is that it is beneficial to formulate a kind of simplified constitutive equation for metallic solids under shock loading, and thus to faithfully describe the behaviours of shocked solids through hydrodynamic simulations. (3) An attempt...

  20. Environmental Survey preliminary report, Princeton Plasma Physics Laboratory, Princeton, New Jersey

    International Nuclear Information System (INIS)

    1989-05-01

    This report presents the preliminary findings of the first phase of the Environmental Survey of the United States Department of Energy's (DOE) Princeton Plasma Physics Laboratory (PPPL), conducted June 13 through 17, 1988. The Survey is being conducted by an interdisciplinary team of environmental specialists, led and managed by the Office of Environment, Safety and Health's Office of Environmental Audit. Team members are being provided by private contractors. The objective of the Survey is to identify environmental problems and areas of environmental risk associated with PPPL. The Survey covers all environmental media and all areas of environmental regulation. It is being performed in accordance with the DOE Environmental Survey Manual. This phase of the Survey involves the review of existing site environmental data, observations of the operations carried on at PPPL, and interviews with site personnel. The Survey team developed a Sampling and Analysis (S ampersand A) Plan to assist in further assessing certain of the environment problems identified during its on-site activities. The S ampersand A plan is being developed by the Idaho National Engineering Laboratory. When completed, the S ampersand A results will be incorporated into the PPPL Survey findings for inclusion in the Environmental Survey Summary Report. 70 refs., 17 figs., 21 tabs

  1. Role of Laboratory Plasma Experiments in exploring the Physics of Solar Eruptions

    Science.gov (United States)

    Tripathi, S.

    2017-12-01

    Solar eruptive events are triggered over a broad range of spatio-temporal scales by a variety of fundamental processes (e.g., force-imbalance, magnetic-reconnection, electrical-current driven instabilities) associated with arched magnetoplasma structures in the solar atmosphere. Contemporary research on solar eruptive events is at the forefront of solar and heliospheric physics due to its relevance to space weather. Details on the formation of magnetized plasma structures on the Sun, storage of magnetic energy in such structures over a long period (several Alfven transit times), and their impulsive eruptions have been recorded in numerous observations and simulated in computer models. Inherent limitations of space observations and uncontrolled nature of solar eruptions pose significant challenges in testing theoretical models and developing the predictive capability for space-weather. The pace of scientific progress in this area can be significantly boosted by tapping the potential of appropriately scaled laboratory plasma experiments to compliment solar observations, theoretical models, and computer simulations. To give an example, recent results from a laboratory plasma experiment on arched magnetic flux ropes will be presented and future challenges will be discussed. (Work supported by National Science Foundation, USA under award number 1619551)

  2. Environmental Survey preliminary report, Princeton Plasma Physics Laboratory, Princeton, New Jersey

    Energy Technology Data Exchange (ETDEWEB)

    1989-05-01

    This report presents the preliminary findings of the first phase of the Environmental Survey of the United States Department of Energy's (DOE) Princeton Plasma Physics Laboratory (PPPL), conducted June 13 through 17, 1988. The Survey is being conducted by an interdisciplinary team of environmental specialists, led and managed by the Office of Environment, Safety and Health's Office of Environmental Audit. Team members are being provided by private contractors. The objective of the Survey is to identify environmental problems and areas of environmental risk associated with PPPL. The Survey covers all environmental media and all areas of environmental regulation. It is being performed in accordance with the DOE Environmental Survey Manual. This phase of the Survey involves the review of existing site environmental data, observations of the operations carried on at PPPL, and interviews with site personnel. The Survey team developed a Sampling and Analysis (S A) Plan to assist in further assessing certain of the environment problems identified during its on-site activities. The S A plan is being developed by the Idaho National Engineering Laboratory. When completed, the S A results will be incorporated into the PPPL Survey findings for inclusion in the Environmental Survey Summary Report. 70 refs., 17 figs., 21 tabs.

  3. Computerization aspects of the Health Physics' Radiation Control Program at Argonne National Laboratory

    International Nuclear Information System (INIS)

    Dolecek, Elwyn H.

    1978-01-01

    Greater public awareness of the potential hazards of ionizing radiation and the more stringent governmental compliance programs have made accountability of radioactive materials an item of increasingly major concern for all radionuclide users. For low-volume (radioisotopically) organizations, manual record keeping techniques may suffice without requiring significant work-hour allocations. When considering high-volume users, the workload contingent with manual inventory is usually excessive from an employee time-allocation standpoint. Therefore, various automation systems are employed, usually with the aid of an in-house or time-purchase computer system. The computer programs developed for these systems often do not allow for future modification without major rewriting. Therefore, to facilitate in program concept, modification, and implementation the Health Physics Section at Argonne National Laboratory chose to design and code its computer program(s) and has instituted a Radiation Administrative Program (RAP) as a major component of the Section's laboratory-wide radiation control program. Coded in ANSI PL/I, RAP provides both flexibility in present concept and allowance for future growth. It requires less than 300K words of computer memory and can be easily incorporated at other organizations with minimal modifications. The modular design provides run cost benefits and versatility of report generation and modification. Through the use of this type of information processing and retrieval system, one can manipulate large amounts of radionuclide data, providing control and identification, while still maintaining commitment of computer costs and employee time at a reasonable level. (author)

  4. Energy Programs at the Johns Hopkins University Applied Physics Laboratory, Quarterly Report, April-June 1980

    Energy Technology Data Exchange (ETDEWEB)

    None

    1980-06-01

    The Johns Hopkins University Applied Physics Laboratory, under contracts with several agencies of the federal government and an agency of the State of Maryland, is engaged in developing energy resources, utilization concepts, and monitoring and storage methods. This Quarterly Report summarizes the work on the various tasks as of 30 June 1980. The Energy Quarterly Report is divided into three sections. The first, Geothermal Energy Development Planning and Technical Assistance, supported by the Department of Energy/Division of Geothermal Energy (DOE/DGE), contains reports on the progress of geothermal-related tasks on which effort was concentrated during the quarter. The second section, Operational Research, Hydroelectric Power Development, supported by the Department of Energy/Resource Applications (DOE/RA), contains reports on small-scale hydroelectric investigations in the southeastern states. The third section, Energy Conversion and Storage Techniques, contains three articles. The first is on data analysis of OTEC core unit condenser tests, and is supported by the Department of Energy/Division of Central Solar Technology (DOE/CST). The second is on the current status of the Community Annual Storage Energy System at the U.S. Naval Air Station, Norfolk, Va., and is supported by the Department of Energy and the Department of Defense, Naval Facilities Engineering Command/Atlantic Division. The third is on utilization of landfill methane and is supported by Argonne National Laboratory.

  5. Field and laboratory emission cell automation and control system for investigating surface chemistry reactions

    Science.gov (United States)

    Flemmer, Michael M.; Ham, Jason E.; Wells, J. R.

    2007-01-01

    A novel system [field and laboratory emission cell (FLEC) automation and control system] has been developed to deliver ozone to a surface utilizing the FLEC to simulate indoor surface chemistry. Ozone, humidity, and air flow rate to the surface were continuously monitored using an ultraviolet ozone monitor, humidity, and flow sensors. Data from these sensors were used as feedback for system control to maintain predetermined experimental parameters. The system was used to investigate the chemistry of ozone with α-terpineol on a vinyl surface over 72h. Keeping all other experimental parameters the same, volatile organic compound emissions from the vinyl tile with α-terpineol were collected from both zero and 100ppb(partsper109) ozone exposures. System stability profiles collected from sensor data indicated experimental parameters were maintained to within a few percent of initial settings. Ozone data from eight experiments at 100ppb (over 339h) provided a pooled standard deviation of 1.65ppb and a 95% tolerance of 3.3ppb. Humidity data from 17 experiments at 50% relative humidity (over 664h) provided a pooled standard deviation of 1.38% and a 95% tolerance of 2.77%. Data of the flow rate of air flowing through the FLEC from 14 experiments at 300ml/min (over 548h) provided a pooled standard deviation of 3.02ml/min and a 95% tolerance range of 6.03ml/min. Initial experimental results yielded long term emissions of ozone/α-terpineol reaction products, suggesting that surface chemistry could play an important role in indoor environments.

  6. Subatomic Physics and Cosmology Laboratory - LPSC Grenoble. Activity report 2008-2009

    International Nuclear Information System (INIS)

    Berat, Corinne; Baylac, Maud; Cholat, Christine; Collot, Johann; Derome, Laurent; Kox, Serge; Lamy, Thierry; Pelletier, Jacques; Renault, Cecile; Real, Jean-Sebastien; Regairaz, William; Richard, Jean-Marc; Vernay, Emmanuelle; Favro, Christian

    2010-01-01

    The Grenoble Subatomic Physics and Cosmology Laboratory - LPSC aims to improve our knowledge about the most elementary particles and about the forces that govern their interactions. It helps to broaden our understanding of the universe, its structure and its evolution. The LPSC is a Mixed Teaching and Research Unit, affiliated to the National Nuclear and Particle Physics Institute (IN2P3), the National Institute of Universe Sciences (INSU) and the National Institute of Engineering Sciences and Systems (INSIS) from the National Centre for Scientific Research (CNRS), as well as to the Joseph Fourier University and the Grenoble National Polytechnique Institute. The LPSC also plays a significant role at the national level and is involved in several international scientific and technical projects. Fundamental research is the driving force of LPSC activities. Among the themes studied at the LPSC, some are focused on the greatest unsolved mysteries of the universe, e.g. the unification of forces, the origin of the mass of particles, the origin of the matter-antimatter asymmetry in the universe and the search for dark matter and energy. Research starts at the scales of the nuclei of atoms and even much smaller, where quantum and relativistic physics laws prevail. The goal here is to understand the characteristics of the most elementary building blocks of matter and their interactions, to study the limits of existence of atoms and to discover new states of nuclear matter, such as the quark-gluon plasma. Research also extends towards the infinitely large; the goal here is to understand the origin of the structures of the universe and the cosmic phenomena that take place, and to understand the characteristics of the very first stages of the universe, just after the Big Bang. The branches of physics at these two extremes are actually closely linked. Infinitely small-scale physics plays an essential role in the first moments of the universe. Particle physics and cosmology both

  7. Subatomic Physics and Cosmology Laboratory - LPSC Grenoble. Activity report 2012-2013

    International Nuclear Information System (INIS)

    Rebreyend, Dominique; Bondoux, Dominique; Chabod, Sebastien; Clement, Benoit; De Conto, Jean-Marie; Delorieux, Colette; Derome, Laurent; Furget, Christophe; Kox, Serge; Lacoste, Ana; Montanet, Francois; Rossetto, Olivier; Smith, Christopher; Vernay, Emmanuelle; Favro, Christian

    2014-03-01

    The Grenoble Subatomic Physics and Cosmology Laboratory - LPSC aims to improve our knowledge about the most elementary particles and about the forces that govern their interactions. It helps to broaden our understanding of the universe, its structure and its evolution. The LPSC is a Mixed Teaching and Research Unit, affiliated to the National Nuclear and Particle Physics Institute (IN2P3), the National Institute of Universe Sciences (INSU) and the National Institute of Engineering Sciences and Systems (INSIS) from the National Centre for Scientific Research (CNRS), as well as to the Joseph Fourier University and the Grenoble National Polytechnique Institute. The LPSC also plays a significant role at the national level and is involved in several international scientific and technical projects. Fundamental research is the driving force of LPSC activities. Among the themes studied at the LPSC, some are focused on the greatest unsolved mysteries of the universe, e.g. the unification of forces, the origin of the mass of particles, the origin of the matter-antimatter asymmetry in the universe and the search for dark matter and energy. Research starts at the scales of the nuclei of atoms and even much smaller, where quantum and relativistic physics laws prevail. The goal here is to understand the characteristics of the most elementary building blocks of matter and their interactions, to study the limits of existence of atoms and to discover new states of nuclear matter, such as the quark-gluon plasma. Research also extends towards the infinitely large; the goal here is to understand the origin of the structures of the universe and the cosmic phenomena that take place, and to understand the characteristics of the very first stages of the universe, just after the Big Bang. The branches of physics at these two extremes are actually closely linked. Infinitely small-scale physics plays an essential role in the first moments of the universe. Particle physics and cosmology both

  8. Interpreting Assessments of Student Learning in the Introductory Physics Classroom and Laboratory

    Science.gov (United States)

    Dowd, Jason Edward

    Assessment is the primary means of feedback between students and instructors. However, to effectively use assessment, the ability to interpret collected information is essential. We present insights into three unique, important avenues of assessment in the physics classroom and laboratory. First, we examine students' performance on conceptual surveys. The goal of this research project is to better utilize the information collected by instructors when they administer the Force Concept Inventory (FCI) to students as a pre-test and post-test of their conceptual understanding of Newtonian mechanics. We find that ambiguities in the use of the normalized gain, g, may influence comparisons among individual classes. Therefore, we propose using stratagrams, graphical summaries of the fraction of students who exhibit "Newtonian thinking," as a clearer, more informative method of both assessing a single class and comparing performance among classes. Next, we examine students' expressions of confusion when they initially encounter new material. The goal of this research project is to better understand what such confusion actually conveys to instructors about students' performance and engagement. We investigate the relationship between students' self-assessment of their confusion over material and their performance, confidence in reasoning, pre-course self-efficacy and several other measurable characteristics of engagement. We find that students' expressions of confusion are negatively related to initial performance, confidence and self-efficacy, but positively related to final performance when all factors are considered together. Finally, we examine students' exhibition of scientific reasoning abilities in the instructional laboratory. The goal of this research project is to explore two inquiry-based curricula, each of which proposes a different degree of scaffolding. Students engage in sequences of these laboratory activities during one semester of an introductory physics

  9. A study of social interaction and teamwork in reformed physics laboratories

    Science.gov (United States)

    Gresser, Paul W.

    It is widely accepted that, for many students, learning can be accomplished most effectively through social interaction with peers, and there have been many successes in using the group environment to improve learning in a variety of classroom settings. What is not well understood, however, are the dynamics of student groups, specifically how the students collectively apprehend the subject matter and share the mental workload. This research examines recent developments of theoretical tools for describing the cognitive states of individual students: associational patterns such as epistemic games and cultural structures such as epistemological framing. Observing small group interaction in authentic classroom situations (labs, tutorials, problem solving) suggests that these tools could be effective in describing these interactions. Though conventional wisdom tells us that groups may succeed where individuals fail, there are many reasons why group work may also run into difficulties, such as a lack or imbalance of knowledge, an inappropriate mix of learning styles, or a destructive power arrangement. This research explores whether or not inconsistent epistemological framing among group members can also be a cause of group failure. Case studies of group interaction in the laboratory reveal evidence of successful groups employing common framing, and unsuccessful groups failing from lack of a shared frame. This study was conducted in a large introductory algebra-based physics course at the University of Maryland, College Park, in a laboratory designed specifically to foster increased student interaction and cooperation. Videotape studies of this environment reveal that productive lab groups coordinate their efforts through a number of locally coherent knowledge-building activities, which are described through the framework of epistemic games. The existence of these epistemic games makes it possible for many students to participate in cognitive activities without a

  10. The Dresden Felsenkeller shallow-underground accelerator laboratory for nuclear astrophysics - Status and first physics program

    Energy Technology Data Exchange (ETDEWEB)

    Ilgner, Ch. [Nuclear Astrophysics group, Helmholtz-Zentrum Dresden-Rossendorf, Institute of Radiation Physics, Dresden (Germany)

    2015-07-01

    Favored by the low background in underground laboratories, low-background accelerator-based experiments are an important tool to study nuclear reactions involving stable charged particles. This technique has been used for many years with great success at the 0.4 MV LUNA accelerator in the Gran Sasso laboratory in Italy, protected from cosmic rays by 1400 m of rock. However, the nuclear reactions of helium and carbon burning and the neutron source reactions for the astrophysical s-process require higher beam energies than those available at LUNA. Also the study of solar fusion reactions necessitates new data at higher energies. As a result, in the present NuPECC long range plan for nuclear physics in Europe, the installation of one or more higher-energy underground accelerators is strongly recommended. An intercomparison exercise using the same High-Purity Ge detector at several sites has shown that, with a combination of 45 m rock overburden, as can be found in the Felsenkeller underground site in Dresden, and an active veto against the remaining muon flux, in a typical nuclear astrophysics setup a background level can be achieved that is similar to the deep underground scenario as in the Gran- Sasso underground laboratory, for instance. Recently, a muon background study and geodetic measurements were carried out by the REGARD group. It was estimated that the rock overburden at the place of the future ion accelerator is equivalent to 130 m of water. The maximum muon flux measured was 2.5 m{sup -2} sr{sup -1} s{sup -1}, in the direction of the tunnel entrance. Based on this finding, a used 5 MV pelletron tandem accelerator with 250 μA up-charge current and external sputter ion source has been obtained and transported to Dresden. Work on an additional radio-frequency ion source on the high voltage terminal is in progress and far advanced. The installation of the accelerator in the Felsenkeller is expected for the near future. The status of the project and the

  11. Assessment of laboratory and daily energy expenditure estimates from consumer multi-sensor physical activity monitors.

    Directory of Open Access Journals (Sweden)

    Enhad A Chowdhury

    Full Text Available Wearable physical activity monitors are growing in popularity and provide the opportunity for large numbers of the public to self-monitor physical activity behaviours. The latest generation of these devices feature multiple sensors, ostensibly similar or even superior to advanced research instruments. However, little is known about the accuracy of their energy expenditure estimates. Here, we assessed their performance against criterion measurements in both controlled laboratory conditions (simulated activities of daily living and structured exercise and over a 24 hour period in free-living conditions. Thirty men (n = 15 and women (n = 15 wore three multi-sensor consumer monitors (Microsoft Band, Apple Watch and Fitbit Charge HR, an accelerometry-only device as a comparison (Jawbone UP24 and validated research-grade multi-sensor devices (BodyMedia Core and individually calibrated Actiheart™. During discrete laboratory activities when compared against indirect calorimetry, the Apple Watch performed similarly to criterion measures. The Fitbit Charge HR was less consistent at measurement of discrete activities, but produced similar free-living estimates to the Apple Watch. Both these devices underestimated free-living energy expenditure (-394 kcal/d and -405 kcal/d, respectively; P<0.01. The multi-sensor Microsoft Band and accelerometry-only Jawbone UP24 devices underestimated most laboratory activities and substantially underestimated free-living expenditure (-1128 kcal/d and -998 kcal/d, respectively; P<0.01. None of the consumer devices were deemed equivalent to the reference method for daily energy expenditure. For all devices, there was a tendency for negative bias with greater daily energy expenditure. No consumer monitors performed as well as the research-grade devices although in some (but not all cases, estimates were close to criterion measurements. Thus, whilst industry-led innovation has improved the accuracy of consumer monitors

  12. Assessment of laboratory and daily energy expenditure estimates from consumer multi-sensor physical activity monitors.

    Science.gov (United States)

    Chowdhury, Enhad A; Western, Max J; Nightingale, Thomas E; Peacock, Oliver J; Thompson, Dylan

    2017-01-01

    Wearable physical activity monitors are growing in popularity and provide the opportunity for large numbers of the public to self-monitor physical activity behaviours. The latest generation of these devices feature multiple sensors, ostensibly similar or even superior to advanced research instruments. However, little is known about the accuracy of their energy expenditure estimates. Here, we assessed their performance against criterion measurements in both controlled laboratory conditions (simulated activities of daily living and structured exercise) and over a 24 hour period in free-living conditions. Thirty men (n = 15) and women (n = 15) wore three multi-sensor consumer monitors (Microsoft Band, Apple Watch and Fitbit Charge HR), an accelerometry-only device as a comparison (Jawbone UP24) and validated research-grade multi-sensor devices (BodyMedia Core and individually calibrated Actiheart™). During discrete laboratory activities when compared against indirect calorimetry, the Apple Watch performed similarly to criterion measures. The Fitbit Charge HR was less consistent at measurement of discrete activities, but produced similar free-living estimates to the Apple Watch. Both these devices underestimated free-living energy expenditure (-394 kcal/d and -405 kcal/d, respectively; P<0.01). The multi-sensor Microsoft Band and accelerometry-only Jawbone UP24 devices underestimated most laboratory activities and substantially underestimated free-living expenditure (-1128 kcal/d and -998 kcal/d, respectively; P<0.01). None of the consumer devices were deemed equivalent to the reference method for daily energy expenditure. For all devices, there was a tendency for negative bias with greater daily energy expenditure. No consumer monitors performed as well as the research-grade devices although in some (but not all) cases, estimates were close to criterion measurements. Thus, whilst industry-led innovation has improved the accuracy of consumer monitors, these devices

  13. The role of the National Physical Laboratory in monitoring and improving dosimetry in UK radiotherapy

    International Nuclear Information System (INIS)

    Thomas, R.A.S.; Duane, S.; McEwen, M.R.; Rosser, K.E.

    2002-01-01

    In the UK, the National Physical Laboratory, in collaboration with the Institute for Physics and Engineering in Medicine operates an audit programme to ensure national consistency in radiotherapy dosimetry. The present programme covers dosimetry of megavoltage photons and electrons (3-19 MeV) and low and medium energy (10-300 kV) photons. The aim of each audit is to verify the local measurement of absorbed dose at the radiotherapy centre. The audit measurements - principally beam quality and linac output - are made following the same protocol as the clinic but using different equipment. The audit is not an absolute measurement of the absorbed dose but amounts to a check that the equipment used by the centre is operating as expected and that the Code of Practice is being followed correctly. The protocols used in the UK are IPSM 1990 for high-energy photons, IPEMB 1996 for electrons and IPEMB 1996 for low energy photons. For the purpose of these audits, NPL maintains a set of calibrated ionisation chambers

  14. The National Spherical Tokamak Experiment at the Princeton Plasma Physics Laboratory

    International Nuclear Information System (INIS)

    1995-12-01

    The Department of Energy (DOE) has prepared an Environmental Assessment (EA), DOE/EA-1108, evaluating the environmental effects of the proposed construction and operation of the National Spherical Tokamak Experiment (NSTX) within the existing C-Stellarator (CS) Building at the Princeton Plasma Physics Laboratory, Princeton, New Jersey. The purpose of the NSTX is to investigate the physics of spherically shaped plasmas as an alternative path to conventional tokamaks for development of fusion energy. Fusion energy has the potential to help compensate for dwindling supplies of fossil fuels and the eventual depletion of fissionable uranium used in present-day nuclear reactors. Construction of the NSTX in the CS Building would require the dismantling and removal of the existing unused Princeton Large Torus (PLT) device, part of which would be reused to construct the NSTX. Based on the analyses in the EA, the DOE has determined that the proposed action does not constitute a major federal action significantly affecting the quality of the human environment within the meaning of the National Environmental Policy Act (NEPA) of 1969, 42 U.S.C. 4,321 et seq. The preparation of an Environmental Impact Statement is not required. Thus, the DOE is issuing a FONSI pursuant to the Council on Environmental Quality regulations implementing NEPA (40 CFR Parts 1500--1508) and the DOE NEPA implementing regulations (10 CFR Part 1021)

  15. Computer soundcard as an AC signal generator and oscilloscope for the physics laboratory

    Science.gov (United States)

    Sinlapanuntakul, Jinda; Kijamnajsuk, Puchong; Jetjamnong, Chanthawut; Chotikaprakhan, Sutharat

    2018-01-01

    The purpose of this paper is to develop both an AC signal generator and a dual-channel oscilloscope based on standard personal computer equipped with sound card as parts of the laboratory of the fundamental physics and the introduction to electronics classes. The setup turns the computer into the two channel measured device which can provides sample rate, simultaneous sampling, frequency range, filters and others essential capabilities required to perform amplitude, phase and frequency measurements of AC signal. The AC signal also generate from the same computer sound card output simultaneously in any waveform such as sine, square, triangle, saw-toothed pulsed, swept sine and white noise etc. These can convert an inexpensive PC sound card into powerful device, which allows the students to measure physical phenomena with their own PCs either at home or at university attendance. A graphic user interface software was developed for control and analysis, including facilities for data recording, signal processing and real time measurement display. The result is expanded utility of self-learning for the students in the field of electronics both AC and DC circuits, including the sound and vibration experiments.

  16. Learning evaluation of interference and diffraction of light in physics laboratory

    Directory of Open Access Journals (Sweden)

    Silvia Bravo

    2016-08-01

    Full Text Available This paper presents the results of an investigation referred to the learning of interference and diffraction of light in the context of a physic laboratory, through the application of a didactic proposal with students from an undergraduate course in physics. The design of the experimental activities has taken into account the difficulties reported by educational research, as well as the contribution of the Vergnaud conceptual fields theory, Ausubel meaningful learning theory and Vigotsky sociolinguistics theory. The research was focused in the study of students cognitive development during the implementation of the didactic proposal and the assessment of it through the skills development. A methodological qualitative approach was used, in an interpretative perspective, with a research-action design, where the researcher acts as a teacher while he collects the data. Researcher's field notes have been used in a complementarily, audio recordings of group interactions, video recordings of students’ teamwork, group reports about the individual activities and assessments. The results obtained from the analysis of the content of the registers and the interpretation from the theory of conceptual fields show an evolution in the students’ schemes. Their initials schemes, which were focused on ray optics, evolve to schemes focused on the wave model. The results obtained from the group reports and from the individual assessment show that all the students have managed to develop most skills raised as learning objectives in the didactic proposal.

  17. Subatomic Physics and Cosmology Laboratory - LPSC Grenoble. Activity report 2010-2011

    International Nuclear Information System (INIS)

    Brissot, Roger; Bechu, Stephane; Boutherin, Bernard; Derome, Laurent; Deslorieux, Colette; Gallin-Martel, Marie-Laure; Kox, Serge; Kraml, Sabine; Lamy, Thierry; Lleres, Annick; Meplan, Olivier; Real, Jean-Sebastien; Sortais, Pascal; Vernay, Emmanuelle; Favro, Christian

    2012-03-01

    The Grenoble Subatomic Physics and Cosmology Laboratory - LPSC aims to improve our knowledge about the most elementary particles and about the forces that govern their interactions. It helps to broaden our understanding of the universe, its structure and its evolution. The LPSC is a Mixed Teaching and Research Unit, affiliated to the National Nuclear and Particle Physics Institute (IN2P3), the National Institute of Universe Sciences (INSU) and the National Institute of Engineering Sciences and Systems (INSIS) from the National Centre for Scientific Research (CNRS), as well as to the Joseph Fourier University and the Grenoble National Polytechnique Institute. The LPSC also plays a significant role at the national level and is involved in several international scientific and technical projects. Fundamental research is the driving force of LPSC activities. Among the themes studied at the LPSC, some are focused on the greatest unsolved mysteries of the universe, e.g. the unification of forces, the origin of the mass of particles, the origin of the matter-antimatter asymmetry in the universe and the search for dark matter and energy. Research starts at the scales of the nuclei of atoms and even much smaller, where quantum and relativistic physics laws prevail. The goal here is to understand the characteristics of the most elementary building blocks of matter and their interactions, to study the limits of existence of atoms and to discover new states of nuclear matter, such as the quark-gluon plasma. Research also extends towards the infinitely large; the goal here is to understand the origin of the structures of the universe and the cosmic phenomena that take place, and to understand the characteristics of the very first stages of the universe, just after the Big Bang. The branches of physics at these two extremes are actually closely linked. Infinitely small-scale physics plays an essential role in the first moments of the universe. Particle physics and cosmology both

  18. Energy programs at the Johns Hopkins University Applied Physics Laboratory. Quarterly report, October--December 1978

    Energy Technology Data Exchange (ETDEWEB)

    1979-01-01

    The Johns Hopkins University Applied Physics Laboratory, under contracts with the U.S. Department of Energy, the National Science Foundation, U.S. Maritime Administration, Maryland Department of Natural Resources, U.S. Department of Commerce, and U.S. Fish and Wildlife Service, is engaged in developing energy resources, utilization concepts, and storage methods. This report is divided into four sections. The first, Geothermal Energy Programs, contains reports on various geothermal investigations in the Atlantic Coastal Plain; a Geothermal Energy Market Survey and a development scenario for the Delmarva area of Maryland. The second, Small-Scale Hydroelectric Energy, contains the results of several major studies on dams and on the economic and institutional issues related to their redevelopment. The third section contains progress reports on two major tasks performed for the Ocean Thermal Energy Conversion (OTEC) Program, Ocean Engineering and Heat Exchangers for OTEC systems. The fourth section, Conservation and Mechanical Storage of Energy, contains reports on flywheels and a JHU-funded heat pump application to the physical plant at APL.

  19. Laboratory preparation questionnaires as a tool for the implementation of the Just in Time Teaching in the Physics I laboratories: Research training

    Science.gov (United States)

    Miranda, David A.; Sanchez, Melba J.; Forero, Oscar M.

    2017-06-01

    The implementation of the JiTT (Just in Time Teaching) strategy is presented to increase the previous preparation of students enrolled in the subject Physics Laboratory I offered at the Industrial University of Santander (UIS), Colombia. In this study, a laboratory preparation questionnaire (CPL) was applied as a tool for the implementation of JiTT combined with elements of mediated learning. It was found that the CPL allows to improve the students’ experience regarding the preparation of the laboratory and the development of the experimental session. These questionnaires were implemented in an academic manager (Moodle) and a web application (lab.ciencias.uis.edu.co) was used to publish the contents essential for the preparation of the student before each practical session. The most significant result was that the students performed the experimental session with the basic knowledge to improve their learning experience.

  20. Surface-wave and refraction tomography at the FACT Site, Sandia National Laboratories, Albuquerque, New Mexico.

    Energy Technology Data Exchange (ETDEWEB)

    Abbott, Robert E.; Bartel, Lewis Clark; Pullammanappallil, Satish (Optim, Inc., Reno, NV); Engler, Bruce Phillip

    2006-08-01

    We present a technique that allows for the simultaneous acquisition and interpretation of both shear-wave and compressive-wave 3-D velocities. The technique requires no special seismic sources or array geometries, and is suited to studies with small source-receiver offsets. The method also effectively deals with unwanted seismic arrivals by using the statistical properties of the data itself to discriminate against spurious picks. We demonstrate the technique with a field experiment at the Facility for Analysis, Calibration, and Testing at Sandia National Laboratories, Albuquerque, New Mexico. The resulting 3-D shear-velocity and compressive-velocity distributions are consistent with surface geologic mapping. The averaged velocities and V{sub p}/V{sub s} ratio in the upper 30 meters are also consistent with examples found in the scientific literature.

  1. Laboratory and field testing results of the LMT/GTM primary surface actuators

    Science.gov (United States)

    Smith, David R.; Souccar, Kamal; Montalvo, Gabriela; Arteaga Magaña, César; Hernández Rebollar, José Luis; Olmos Tapia, Arak; Gallieni, Daniele; Lazzarini, Paolo; Fumi, Pierluigi; Anaclerio, Enzo

    2016-07-01

    With the final installation of the two outermost rings of the primary surface of the Large Millimeter Telescope/ Gran Telescopio Milimétrico (LMT/GTM), the project is also upgrading the primary surface actuators. There are commercial actuators that can approach the required operational accuracy and stroke, but the combination of the size and load requirements ultimately required a customized design. The new actuators fit within the volume constraints imposed by the tighter interior angles in the outer rings and are designed to support the operational and survival loading conditions even for the largest surface segments. Laboratory testing confirmed that the actuators should meet the precision, repeatability, load, and lifetime requirements. However, the LMT/GTM is at a particularly difficult site for electromechanical systems. The high altitude has the usual effect of reducing cooling effectiveness for the drives and motors, and the ambient temperature hovers near freezing. Since there is a significant amount of precipitation during some times of the year, there are frequent freeze/thaw cycles. The constant formation and either sublimation or melting of ice, along with the associated high humidity, has been a challenge for the environmental protection of many devices at the LMT/GTM. Because there are a total of 720 primary surface actuators in the system, it is particularly important that the actuators, their local drive control boxes, and their cable connections be able to meet its specifications even under the site conditions. To confirm the suitability of the actuators, the LMT/GTM procured an initial set of sixteen actuators for testing at the site. After laboratory testing, the actuators were installed into the outer two rings of the telescope and cycled during the early winter months of the 2015-16 scientific observing season. Because of the continuing installation activities in these two rings, they are not illuminated by the receivers, so field testing

  2. An Overview of the Naval Research Laboratory Ocean Surface Flux (NFLUX) System

    Science.gov (United States)

    May, J. C.; Rowley, C. D.; Barron, C. N.

    2016-02-01

    The Naval Research Laboratory (NRL) ocean surface flux (NFLUX) system is an end-to-end data processing and assimilation system used to provide near-real time satellite-based surface heat flux fields over the global ocean. Swath-level air temperature (TA), specific humidity (QA), and wind speed (WS) estimates are produced using multiple polynomial regression algorithms with inputs from satellite sensor data records from the Special Sensor Microwave Imager/Sounder, the Advanced Microwave Sounding Unit-A, the Advanced Technology Microwave Sounder, and the Advanced Microwave Scanning Radiometer-2 sensors. Swath-level WS estimates are also retrieved from satellite environmental data records from WindSat, the MetOp scatterometers, and the Oceansat scatterometer. Swath-level solar and longwave radiative flux estimates are produced utilizing the Rapid Radiative Transfer Model for Global Circulation Models (RRTMG). Primary inputs to the RRTMG include temperature and moisture profiles and cloud liquid and ice water paths from the Microwave Integrated Retrieval System. All swath-level satellite estimates undergo an automated quality control process and are then assimilated with atmospheric model forecasts to produce 3-hourly gridded analysis fields. The turbulent heat flux fields, latent and sensible heat flux, are determined from the Coupled Ocean-Atmosphere Response Experiment (COARE) 3.0 bulk algorithms using inputs of TA, QA, WS, and a sea surface temperature model field. Quality-controlled in situ observations over a one-year time period from May 2013 through April 2014 form the reference for validating ocean surface state parameter and heat flux fields. The NFLUX fields are evaluated alongside the Navy's operational global atmospheric model, the Navy Global Environmental Model (NAVGEM). NFLUX is shown to have smaller biases and lower or similar root mean square errors compared to NAVGEM.

  3. INFORMATION TECHNOLOGIES AS THE TOOL OF EFFICIENCY IMPROVING OF FUTURE PHYSICS TEACHERS TRAINING TO LABORATORY SESSION IN OPTICS

    Directory of Open Access Journals (Sweden)

    Goncharenko T.

    2017-12-01

    Full Text Available The analysis of the problem of the use of information technologies implementation as the tool of the efficiency improving of future physics teachers training to execution of laboratory session in Optics is considered in the article. The problems and contradictions concerning ICT tools use in higher education institutions, the work of which is aimed at future physics teachers training are described. Due to the specifics of future teachers training in higher education institutions, labor market requirements and public procurement, the main ICT tools are identified, that are effective in students’ self-activity work to laboratory session execution. The developed list of electronic resources is divided into blocks according to the topics of laboratory works in Optics. The methodology of using of ICT tools at future students training for laboratory session on the example of individual topics is considered.

  4. Assessing students' learning outcomes, self-efficacy and attitudes toward the integration of virtual science laboratory in general physics

    Science.gov (United States)

    Ghatty, Sundara L.

    Over the past decade, there has been a dramatic rise in online delivery of higher education in the United States. Recent developments in web technology and access to the internet have led to a vast increase in online courses. For people who work during the day and whose complicated lives prevent them from taking courses on campus, online courses are the only alternatives by which they may achieve their goals in education. The laboratory courses are the major requirements for college and university students who want to pursue degree and certification programs in science. It is noted that there is a lack of laboratory courses in online physics courses. The present study addressed the effectiveness of a virtual science laboratory in physics instruction in terms of learning outcomes, attitudes, and self-efficacy of students in a Historically Black University College. The study included fifty-eight students (36 male and 22 female) of different science majors who were enrolled in a general physics laboratory course. They were divided into virtual and traditional groups. Three experiments were selected from the syllabus. The traditional group performed one experiment in a traditional laboratory, while the virtual group performed the same experiment in a virtual laboratory. For the second experiment, the use of laboratories by both groups was exchanged. Learner's Assessment Test (LAT), Attitudes Toward Physics Laboratories (ATPL), and Self-Efficacy Survey (SES) instruments were used. Additionally, quantitative methods such as an independent t-test, a paired t-test, and correlation statistics were used to analyze the data. The results of the first experiment indicated the learning outcomes were higher in the Virtual Laboratory than in the traditional laboratory, whereas there was no significant difference in learning outcomes with either type of lab instruction. However, significant self-efficacy gains were observed. Students expressed positive attitudes in terms of liking

  5. Laboratory evaluation of the effect of toothbrushing on surface gloss of resin composites.

    Science.gov (United States)

    Lefever, Dorien; Krejci, Ivo; Ardu, Stefano

    2014-02-01

    To determine changes in surface gloss of different composite materials after laboratory toothbrushing simulation. 40 specimens were fabricated for each material (Filtek Supreme XTE, Renamel, Empress Direct, Gradia Direct, Edelweiss, G-aenial, Venus Pearl and Venus Diamond) and polished with 120-, 220-, 500-, 1200-, 2400- and 4000- grit SiC abrasive paper, respectively. Gloss measurements were made with a glossmeter prior to testing procedures and then subjected to simulated toothbrushing for 5, 15, 30 and 60 minutes by means of an electrical toothbrush with a pressure of 2N while being immersed in a 50 RDA toothpaste slurry. Four samples per group were analyzed under SEM immediately after polishing procedures and four samples after 60 minutes simulated toothbrushing in order to evaluate the causes of the gloss decrease. Human enamel was the control group. Statistical analysis was performed using Kruskal Wallis and Tukey's post-hoc test (P < 0.05). Resin composite initial gloss values ranged from 78.2 to 100.5 at baseline to 13.8 to 62.4 after 1 hour of brushing. Highest gloss values were obtained by Filtek Supreme XTE and Renamel (P < 0.05), followed by Empress Direct. Lowest values were obtained with Venus Diamond, Venus Pearl, G-aenial and Edelweiss. Human enamel was the only material which maintained its gloss throughout the brushing procedure (110.4 after 60 minutes). SEM analysis revealed different patterns of surface degradation dependant on the material.

  6. The impact of longer term intervention on reforming physical science teachers' approaches to laboratory instruction: Seeking a more effective role for the laboratory in science instruction

    Science.gov (United States)

    Priestley, William Joseph

    This study is one of six companion studies investigating ways of improving the overall role of laboratory experiences in science instruction. The primary purpose of the study was to explore the extent to which longer term inservice experiences with modeled inquiry-based instruction caused immediate reform in the approach that inservice teachers of physical science use in pre- and post-laboratory instruction, as well as their ability to restructure their physical science courses to give greater emphasis to the inquiry approach. A secondary purpose was to compare the findings of this study with those of the companion study by H. Priestley (1996) which studied life science teachers (LSTs). A full semester graduate level science education course entitled Science Education 716, The Teaching of Chemistry, developed by two experienced Temple University professors, provided the necessary modeled inquiry-oriented pedagogical approach. Pre- and post-laboratory sessions were videotaped and analyzed using the Modified Revised Science Teacher Behavioral Inventory to determine the frequency of occurrence of the teaching behaviors used. Inservice teacher behavior profiles were compared to the profiles of traditional and model teaching. Eleven of the 14 PSTs presented post-laboratory sessions that used student laboratory data and/or observations to provide a foundation for the follow-up discussion. Eight of these 11, demonstrated, to a considerable degree, the model approach to instruction. Within this group of 8, four indicated that they utilized the modeled approach prior to the inservice treatment while the remaining 4 showed that they could restructure their courses and reform their teaching behaviors to approach the model profile. While the exploration reported herein did not reveal statistical significance in the teaching behaviors between the PST and LST groups of teachers, these teachers did show significant differences in the amount of time used in conducting post-laboratory

  7. Integrated Verification Experiment data collected as part of the Los Alamos National Laboratory`s Source Region Program. Appendix B: Surface ground motion

    Energy Technology Data Exchange (ETDEWEB)

    Weaver, T.A.; Baker, D.F.; Edwards, C.L.; Freeman, S.H.

    1993-10-01

    Surface ground motion was recorded for many of the Integrated Verification Experiments using standard 10-, 25- and 100-g accelerometers, force-balanced accelerometers and, for some events, using golf balls and 0.39-cm steel balls as surface inertial gauges (SIGs). This report contains the semi-processed acceleration, velocity, and displacement data for the accelerometers fielded and the individual observations for the SIG experiments. Most acceleration, velocity, and displacement records have had calibrations applied and have been deramped, offset corrected, and deglitched but are otherwise unfiltered or processed from their original records. Digital data for all of these records are stored at Los Alamos National Laboratory.

  8. Laboratory evaluations of elmex inter X toothbrushes for interproximal access efficacy and posterior tooth surface cleaning.

    Science.gov (United States)

    Yankell, S L; Shi, X; Emling, R C

    2002-01-01

    Laboratory methods have been developed to evaluate the ability of toothbrush bristles to remove artificial plaque deposits at interproximal sites (Interproximal Access Efficacy; IAE) and on distal tooth surfaces (Posterior Tooth Surface Cleaning; PTSC). In the testing performed for this study, six toothbrushes were evaluated. These were: elmex inter X Sensitive; elmex inter X Sensitive Short Head; elmex inter X medium; elmex inter X Medium Short Head; Oral-B Cross Action 40 medium; and the ADA reference standard toothbrush. Six toothbrushes of each design were tested four times under wet brushing conditions in all assays. In the IAE studies, toothbrushing was conducted using a vertical or horizontal brushing motion, simulated anterior or posterior teeth, and a brushing weight of 250 g. The bristles were placed at a 90 degree angle to the tooth surface, and brushing was performed for 15 seconds at two strokes per second with 50 mm strokes. IAE was recorded as the maximum width of simulated plaque deposit removed. For the PTSC evaluations, a horizontal brushing motion was used on posterior tooth shapes, with a 250 g brushing pressure for ten seconds. PTSC was determined as the maximum measurement of artificial plaque deposit removed from the mid-facial area to the maximum post-distal area of the most posterior simulated tooth shape. All data were assessed with ANOVA and the post hoc Tukey test. In the individual IAE tests, with vertical or horizontal brushing on anterior and posterior simulated teeth, and on overall IAE mean values, the four elmex inter X toothbrushes were significantly higher (p PTSC values for all toothbrushes were significantly higher (p PTSC. All elmex inter X brushes were statistically significantly higher (p PTSC compared to the PTSC mean values of the other elmex inter X products tested.

  9. The physical structure of the oceanic surface-layer

    Energy Technology Data Exchange (ETDEWEB)

    Fedorov, K.N.

    1981-01-01

    A study is presented of the structure of the near-surface layer of the ocean under various hydrometeorological conditions. Such a study allows the isolation of border measures for a four characteristic regime for the top ocean layer: 1) intensive wind-wave mixing; 2) Langmuir circulation; 3) intense solar heating during still and calm weather (with and without internal wave modulations); 4) a pressing-out of surface sediment. It is demonstrated that the spatial temperature change in the ocean surface, the thermal structure, and the heat attainment in the top layer have various characteristics during different regimes and this must be considered during the measuring of the ocean surface temperature with the contact method as well as during the comparison of contact and satallite data on the ocean surface temperature. The necessity for more research in this area is underscored.

  10. Nuclear Physics Laboratory, University of Colorado technical progress report, 1976 and proposal for continuation of contract

    International Nuclear Information System (INIS)

    1976-01-01

    This report summarizes the work carried out at the Nuclear Physics Laboratory of the University of Colorado during the period November 1, 1975 to November 1, 1976. The low energy nuclear physics section is dominated by light-ion reaction studies which span a wide range. These include both two-neutron and two-proton transfer reactions, charge exchange and inelastic scattering, as well as single nucleon transfer reactions. The nuclei studied vary widely in their mass and characteristics. These reaction studies have been aided by the multi-use scattering chamber which now allows the energy-loss-spectrometer beam preparation system (beam swinger) to shift from charged particle studies to neutron time-of-flight studies with a minimum loss of time. The intermediate energy section reflects the increase in activity accompanying the arrival of LAMPF data and the initiation of (p,d) studies at the Indiana separated-sector cyclotron. The nucleon removal results provided by the π beam at EPICS previous to completion of the spectrometer have shown that nuclear effects dominate this process, so that the widely used free interaction picture is inadequate. The section entitled ''Other Activities'' reveals continuing activities in new applications of nuclear techniques to problems in medicine and biology. Reactions important to astrophysics continue to be investigated and our trace-element program remains at a high level of activity. The theoretical section reports new progress in understanding magnitudes of two-step reactions by inclusion of finite-range effects. A new finite-range program which is fast and economical has been completed. Intermediate energy results include calculations of π-γ angular correlations, low energy π-nucleus interactions, as well as (p,d) and nucleon scattering calculations for intermediate energies

  11. The physics of water droplets on surfaces: exploring the effects of roughness and surface chemistry

    Science.gov (United States)

    Eid, K. F.; Panth, M.; Sommers, A. D.

    2018-03-01

    This paper explores the fluid property commonly called surface tension, its effect on droplet shape and contact angle, and the major influences of contact angle behaviour (i.e. surface roughness and surface chemistry). Images of water droplets placed on treated copper surfaces are used to measure the contact angles between the droplets and the surface. The surface wettability is manipulated either by growing a self-assembled monolayer on the surface to make it hydrophobic or by changing the surface roughness. The main activities in this experiment, then, are (1) preparing and studying surfaces with different surface wettability and roughness; (2) determining the shape and contact angles of water droplets on these surfaces; and (3) demonstrating the spontaneous motion of water droplets using surface tension gradients.

  12. Vitamin D, surface electromyography and physical function in uraemic patients

    DEFF Research Database (Denmark)

    Heaf, J.G.; Mølsted, Stig; Harrison, Adrian Paul

    2010-01-01

    ) under voluntary contractions. Physical function was determined using a 30-second Chair Stand Test and the Short Form 36 quality of life questionnaire. Clinical characteristics were collected from the patient records. Results: Moderate vitamin 25-OHD deficiency (

  13. Upgrading the Medical Physics Calibration Laboratory Towards ISO/IEC 17025: Radiation Standards and Calibration in Diagnostic Radiology

    International Nuclear Information System (INIS)

    Asmaliza Hashim; Muhammad Jamal Md Isa; Abd Aziz Mhd Ramli; Wan Hazlinda Ismail; Norhayati Abdullah; Shahrul Azlan Azizan; Siti Sara Deraman; Nor Azlin Azraai; Md Khairusalih Md Zin

    2010-01-01

    Calibration of quality control (QC) test tools used in diagnostic radiology is legally required under the Ministry of Health (MOH) requirement. The Medical Physics Calibration Laboratory of the Malaysian Nuclear Agency is the national focal point for the calibration of quality control test tools used in diagnostic radiology. The Medical Physics Calibration Laboratory has measurement traceability to primary standard dosimetry laboratory (Physikalisch-Technische Bundesanstalt (PTB)), thus providing an interface between the primary standard dosimetry laboratory and Malaysian hospitals, clinics and license class H holder. The Medical Physics Calibration Laboratory facility is comprised of a constant potential x-ray system with a capability of 160 kV tube and a series of reference and working standard ion chambers. The stability of reference and working standard ion chambers was measured using strontium-90. Dosimetric instruments used in diagnostic radiology is calibrated in terms of air kerma to comply with an International Code of Practices of dosimetry for example IAEA's Technical Report Series number 457. The new series of standard radiation qualities was established based on ISO/IEC 61267. The measurement of beam homogeneity was measured using film and ion chamber to define the field size at certain distance and kV output was measured using the spectrometer and non-invasive kVp meter. The uncertainties measurement was determined with expended uncertainties to a level of confidence of approximately 95% (coverage factor k=2). This paper describes the available facility and the effort of the Medical Physics Calibration Laboratory to upgrade the laboratory towards ISO/IEC 17025. (author)

  14. Dynamic surface deformation of silicone elastomers for management of marine biofouling: laboratory and field studies using pneumatic actuation.

    Science.gov (United States)

    Shivapooja, Phanindhar; Wang, Qiming; Szott, Lizzy M; Orihuela, Beatriz; Rittschof, Daniel; Zhao, Xuanhe; López, Gabriel P

    2015-01-01

    Many strategies have been developed to improve the fouling release (FR) performance of silicone coatings. However, biofilms inevitably build on these surfaces over time. Previous studies have shown that intentional deformation of silicone elastomers can be employed to detach biofouling species. In this study, inspired by the methods used in soft-robotic systems, controlled deformation of silicone elastomers via pneumatic actuation was employed to detach adherent biofilms. Using programmed surface deformation, it was possible to release > 90% of biofilm from surfaces in both laboratory and field environments. A higher substratum strain was required to remove biofilms accumulated in the field environment as compared with laboratory-grown biofilms. Further, the study indicated that substratum modulus influences the strain needed to de-bond biofilms. Surface deformation-based approaches have potential for use in the management of biofouling in a number of technological areas, including in niche applications where pneumatic actuation of surface deformation is feasible.

  15. Energy Programs at the Johns Hopkins University Applied Physics Laboratory, Quarterly Report, July-September 1980

    Energy Technology Data Exchange (ETDEWEB)

    None

    1980-09-01

    The Johns Hopkins University Applied Physics Laboratory, under contracts with several agencies of the federal government, is engaged in developing energy resources, utilization concepts, and monitoring and storage methods. This Quarterly Report summarizes the work on the various tasks as of 31 September 1980. The Energy Quarterly Report is divided into four sections. The first, Geothermal Energy Development Planning and Technical Assistance, supported by the Department of Energy/Division of Geothermal Energy (DOE/DGE), contains reports on the progress of geothermal-related tasks on which effort was concentrated during the quarter. The second section, Operational Research, Hydroelectric Power Development, supported by the Department of Energy/Resource Applications (DOE/RA), contains reports on small-scale hydroelectric investigations in the southeastern states. The third section, Seismotectonic Investigations, supported by the Reactor Safety Research Division of the Nuclear Regulatory Commission (NRC), reports on neotectonic investigations of the Manhattan Prong. The fourth section, Energy Conversion and Storage Techniques, contains three articles. The first is an evaluation of the Einstein refrigerator, supported by independent IR&D funds. The second concerns OTEC pilot plant performance calculations, supported by the Department of Energy/Division of Central Solar Technology (DOE/CST). The third, describing a study of landfill methane recovery, is supported by the National Park Service.

  16. Energy Programs at the Johns Hopkins University Applied Physics Laboratory, Quarterly Report, January-March 1980

    Energy Technology Data Exchange (ETDEWEB)

    Entingh, Daniel J.

    1980-03-01

    The Johns Hopkins University Applied Physics Laboratory, under contracts with several agencies of the federal government and an agency of the State of Maryland, is engaged in developing energy resources, utilization concepts, and monitoring and storage methods. This Quarterly Report summarizes the work on the various tasks as of 31 March 1980. The Energy Quarterly Report is divided into four sections. The first, Geothermal Energy Development Planning and Technical Assistance, supported by the Department of Energy/Division of Geothermal Energy (DOE/DGE), contains reports on the progress of geothermal-related tasks on which effort was concentrated during the quarter. The second section, Operational Research, Hydroelectric Power Development, supported by the Department of Energy/Resource Applications (DOE/DGE), contains reports on small-scale hydroelectric investigations in the southeastern states. The third section, Seismotectonic Investigation, supported by the Reactor Safety Research Division of the Nuclear Regulatory Commission, reports on a neotectonic investigation in Connecticut. The fourth section, Energy Conversion and Storage Techniques, contains two articles, the first on OTEC core unit testing supported by the Department of Energy/Division of Central Solar Technology (DOE/CST), and the second on an analysis of the Community Annual Storage Energy System at the U.S. Naval Air Station, Norfolk, Va. This work is supported by the Department of Energy and the Department of Defense, Naval Facilities Engineering Command/Atlantic Division.

  17. Princeton Plasma Physics Laboratory (PPPL) annual site environmental report for calendar year 1990

    International Nuclear Information System (INIS)

    Stencel, J.R.; Finley, V.L.

    1991-12-01

    This report gives the results of the environmental activities and monitoring programs at the Princeton Plasma Physics Laboratory for CY90. The report is prepared to provide the US Department of Energy (DOE) and the public with information on the level of radioactive and nonradioactive pollutants, if any, added to the environment as a result of PPPL operations, as well as environmental initiatives, assessments, and programs. The objective of the Annual Site Environmental Report is to document evidence that DOE facility environmental protection programs adequately protect the environment and the public health. The PPPL has engaged in fusion energy research since 1951 and in 1990 had one of its two large tokamak devices in operation: namely, the Tokamak Fusion Test Reactor. The Princeton Beta Experiment-Modification is undergoing new modifications and upgrades for future operation. A new machine, the Burning Plasma Experiment -- formerly called the Compact Ignition Tokamak -- is under conceptual design, and it is awaiting the approval of its draft Environmental Assessment report by DOE Headquarters. This report is required under the National Environmental Policy Act. The long-range goal of the US Magnetic Fusion Energy Research Program is to develop and demonstrate the practical application of fusion power as an alternate energy source. 59 refs., 39 figs., 45 tabs

  18. The usefulness of physical examination and laboratory data in pediatric patients with blunt abdominal trauma

    International Nuclear Information System (INIS)

    Muramori, Katsumi; Kondo, Tsuyoshi; Zaizen, Yoshio; Tsuno, Shinsuke

    2007-01-01

    To evaluate the usefulness of clinical and laboratory data in pediatric patients with abdominal blunt trauma, the case records of 43 pediatric cases with blunt trauma who were admitted to our hospital were reviewed retrospectively. Among these patients, 23 were determined to have intraabdominal injury. Abdominal physical examination was not statistically identified to be a predictor of intraabdominal injury, however, the hematocrit and serum aspartate aminotransferase (AST) and alanine aminotransferase (ALT) values were significantly aberrant in these cases. Furthermore, the mean AST and ALT values in the non-hepatic injury cases were also apt to be higher than those in the no-injury group. These findings suggested that the serum AST and ALT may be possible predictors of intraabdominal injury, not only that restricted to the liver. Additionally, in our cases, abdominal CT examination was more diagnostic than ultrasound examination. Accordingly, in cases of pediatric abdominal blunt trauma with aberrant serum values of the liver transaminases, CT san should be performed electively. (author)

  19. Influence of urban surface properties and rainfall characteristics on surface water flood outputs - insights from a physical modelling environment

    Science.gov (United States)

    Green, Daniel; Pattison, Ian; Yu, Dapeng

    2017-04-01

    Surface water (pluvial) flooding occurs when excess rainfall from intense precipitation events is unable to infiltrate into the subsurface or drain via natural or artificial drainage channels. Surface water flood events pose a major hazard to urban regions across the world, with nearly two thirds of flood damages in the UK being caused by surface water flood events. The perceived risk of surface water flooding appears to have increased in recent years due to several factors, including (i) precipitation increases associated with climatic change and variability; (ii) population growth meaning more people are occupying flood risk areas, and; (iii) land-use changes. Because urban areas are often associated with a high proportion of impermeable land-uses (e.g. tarmacked or paved surfaces and buildings) and a reduced coverage of vegetated, permeable surfaces, urban surface water flood risk during high intensity precipitation events is often exacerbated. To investigate the influence of urbanisation and terrestrial factors on surface water flood outputs, rainfall intensity, catchment slope, permeability, building density/layout scenarios were designed within a novel, 9m2 physical modelling environment. The two-tiered physical model used consists of (i) a low-cost, nozzle-type rainfall simulator component which is able to simulate consistent, uniformly distributed rainfall events of varying duration and intensity, and; (ii) a reconfigurable, modular plot surface. All experiments within the physical modelling environment were subjected to a spatiotemporally uniform 45-minute simulated rainfall event, while terrestrial factors on the physical model plot surface were altered systematically to investigate their hydrological response on modelled outflow and depth profiles. Results from the closed, controlled physical modelling experiments suggest that meteorological factors, such as the duration and intensity of simulated rainfall, and terrestrial factors, such as model slope

  20. Decommissioning the physics laboratory, building 777-10A, at the Savannah River Site (SRS)

    International Nuclear Information System (INIS)

    Musall, John C.; Cope, Jeff L.

    2008-01-01

    SRS recently completed a four year mission to decommission ∼250 excess facilities. As part of that effort, SRS decommissioned a 48,000 ft 2 laboratory that housed four low-power test reactors, formerly used by SRS to determine reactor physics. This paper describes and reviews the decommissioning, with a focus on component segmentation and handling (i.e. hazardous material removal, demolition, and waste handling). The paper is intended to be a resource for engineers, planners, and project managers, who face similar decommissioning challenges. Building 777-10A, located at the south end of SRS's A/M-Area, was built in 1953 and had a gross area of ∼48,000 ft 2 . Building 777-10A had two main areas: a west wing, which housed four experimental reactors and associated equipment; and an east wing, which housed laboratories, and shops, offices. The reactors were located in two separate areas: one area housed the Process Development Pile (PDP) reactor and the Lattice Test Reactor (LTR), while the second area housed the Standard Pile (SP) and the Sub-critical Experiment (SE) reactors. The west wing had five levels: three below and three above grade (floor elevations of -37', -28', -15', 0', +13'/+16' and +27' (roof elevation of +62')), while the east wing had two levels: one below and one above grade (floor elevations of -15' and 0' (roof elevation of +16')). Below-grade exterior walls were constructed of reinforced concrete, ∼1' thick. In general, above-grade exterior walls were steel frames covered by insulation and corrugated, asbestos-cement board. The two interior walls around the PDP/LTR were reinforced concrete ∼5' thick and ∼30' high, while the SP/SE reactors resided in a reinforced, concrete cell with 3.5'-6' thick walls/roof. All other interior walls were constructed of metal studs covered with either asbestos-cement or gypsum board. In general, the floors were constructed of reinforced concrete on cast-in-place concrete beams below-grade and concrete on

  1. Land Surface Modeling and Data Assimilation to Support Physical Precipitation Retrievals for GPM

    Science.gov (United States)

    Peters-Lidard, Christa D.; Tian. Yudong; Kumar, Sujay; Geiger, James; Choudhury, Bhaskar

    2010-01-01

    Objective: The objective of this proposal is to provide a routine land surface modeling and data assimilation capability for GPM in order to provide global land surface states that are necessary to support physical precipitation retrieval algorithms over land. It is well-known that surface emission, particularly over the range of frequencies to be included in GPM, is sensitive to land surface states, including soil properties, vegetation type and greenness, soil moisture, surface temperature, and snow cover, density, and grain size. Therefore, providing a robust capability to routinely provide these critical land states is essential to support GPM-era physical retrieval algorithms over land.

  2. Physics Laboratory Investigation of Vocational High School Field Stone and Concrete Construction Techniques in the Central Java Province (Indonesia)

    Science.gov (United States)

    Purwandari, Ristiana Dyah

    2015-01-01

    The investigation aims in this study were to uncover the observations of infrastructures and physics laboratory in vocational high school for Stone and Concrete Construction Techniques Expertise Field or Teknik Konstruksi Batu dan Beton (TKBB)'s in Purwokerto Central Java Province, mapping the Vocational High School or Sekolah Menengah Kejuruan…

  3. Ab Initio Determinations of Photoelectron Spectra Including Vibronic Features: An Upper-Level Undergraduate Physical Chemistry Laboratory

    Science.gov (United States)

    Lord, Richard L.; Davis, Lisa; Millam, Evan L.; Brown, Eric; Offerman, Chad; Wray, Paul; Green, Susan M. E.

    2008-01-01

    We present a first-principles determination of the photoelectron spectra of water and hypochlorous acid as a laboratory exercise accessible to students in an undergraduate physical chemistry course. This paper demonstrates the robustness and user-friendliness of software developed for the Franck-Condon factor calculation. While the calculator is…

  4. Content Analysis of Online Discussion on a Senior-High-School Discussion Forum of a Virtual Physics Laboratory

    Science.gov (United States)

    Guan, Ying-Hua; Tsai, Chin-Chung; Hwang, Fu-Kwun

    2006-01-01

    In this study we content analyzed the online discussion of several senior-high-school groups on a forum of a virtual physics laboratory in Taiwan. The goal of our research was to investigate the nature of non-course-based online discussion and to find out some useful guidelines in developing such discussion forums for learning purposes. We adapted…

  5. Coal surface control for advanced physical fine coal cleaning technologies. Final report, September 19, 1988--August 31, 1992

    Energy Technology Data Exchange (ETDEWEB)

    Morsi, B.I.; Chiang, S.H.; Sharkey, A.; Blachere, J.; Klinzing, G.; Araujo, G.; Cheng, Y.S.; Gray, R.; Streeter, R.; Bi, H.; Campbell, P.; Chiarlli, P.; Ciocco, M.; Hittle, L.; Kim, S.; Kim, Y.; Perez, L.; Venkatadri, R.

    1992-12-31

    This final report presents the research work carried out on the Coal Surface Control for Advanced Physical Fine Coal Cleaning Technologies project, sponsored by the US Department of Energy, Pittsburgh Energy Technology Center (DOE/PETC). The project was to support the engineering development of the selective agglomeration technology in order to reduce the sulfur content of US coals for controlling SO{sub 2} emissions (i.e., acid rain precursors). The overall effort was a part of the DOE/PETCs Acid Rain Control Initiative (ARCI). The overall objective of the project is to develop techniques for coal surface control prior to the advanced physical fine coal cleaning process of selective agglomeration in order to achieve 85% pyrite sulfur rejection at an energy recovery greater than 85% based on run-of-mine coal. The surface control is meant to encompass surface modification during grinding and laboratory beneficiation testing. The project includes the following tasks: Project planning; methods for analysis of samples; development of standard beneficiation test; grinding studies; modification of particle surface; and exploratory R&D and support. The coal samples used in this project include three base coals, Upper Freeport - Indiana County, PA, Pittsburgh NO. 8 - Belmont County, OH, and Illinois No. 6 - Randolph County, IL, and three additional coals, Upper Freeport - Grant County- WV, Kentucky No. 9 Hopkins County, KY, and Wyodak - Campbell County, WY. A total of 149 drums of coal were received.

  6. Laboratory investigation and direct numerical simulation of wind effect on steep surface waves

    Science.gov (United States)

    Troitskaya, Yuliya; Sergeev, Daniil; Druzhinin, Oleg; Ermakova, Olga

    2015-04-01

    The small scale ocean-atmosphere interaction at the water-air interface is one of the most important factors determining the processes of heat, mass, and energy exchange in the boundary layers of both geospheres. Another important aspect of the air-sea interaction is excitation of surface waves. One of the most debated open questions of wave modeling is concerned with the wind input in the wave field, especially for the case of steep and breaking waves. Two physical mechanisms are suggested to describe the excitation of finite amplitude waves. The first one is based on the treatment of the wind-wave interaction in quasi-linear approximation in the frameworks of semi-empirical models of turbulence of the low atmospheric boundary layer. An alternative mechanism is associated with separation of wind flow at the crests of the surface waves. The "separating" and "non-separating" mechanisms of wave generation lead to different dependences of the wind growth rate on the wave steepness: the latter predicts a decrease in the increment with wave steepness, and the former - an increase. In this paper the mechanism of the wind-wave interaction is investigated basing on physical and numerical experiments. In the physical experiment, turbulent airflow over waves was studied using the video-PIV method, based on the application of high-speed video photography. Alternatively to the classical PIV technique this approach provides the statistical ensembles of realizations of instantaneous velocity fields. Experiments were performed in a round wind-wave channel at Institute of Applied Physics, Russian Academy of Sciences. A fan generated the airflow with the centerline velocity 4 m/s. The surface waves were generated by a programmed wave-maker at the frequency of 2.5 Hz with the amplitudes of 0.65 cm, 1.4 cm, and 2 cm. The working area (27.4 × 10.7 cm2) was at a distance of 3 m from the fan. To perform the measurements of the instantaneous velocity fields, spherical polyamide

  7. Physical basis for river segmentation from water surface observables

    Science.gov (United States)

    Samine Montazem, A.; Garambois, P. A.; Calmant, S.; Moreira, D. M.; Monnier, J.; Biancamaria, S.

    2017-12-01

    With the advent of satellite missions such as SWOT we will have access to high resolution estimates of the elevation, slope and width of the free surface. A segmentation strategy is required in order to sub-sample the data set into reach master points for further hydraulic analyzes and inverse modelling. The question that arises is : what will be the best node repartition strategy that preserves hydraulic properties of river flow? The concept of hydraulic visibility introduced by Garambois et al. (2016) is investigated in order to highlight and characterize the spatio-temporal variations of water surface slope and curvature for different flow regimes and reach geometries. We show that free surface curvature is a powerful proxy for characterizing the hydraulic behavior of a reach since concavity of water surface is driven by variations in channel geometry that impacts the hydraulic properties of the flow. We evaluated the performance of three segmentation strategies by means of a well documented case, that of the Garonne river in France. We conclude that local extrema of free surface curvature appear as the best candidate for locating the segment boundaries for an optimal hydraulic representation of the segmented river. We show that for a given river different segmentation scales are possible: a fine-scale segmentation which is driven by fine-scale hydraulic to large-scale segmentation driven by large-scale geomorphology. The segmentation technique is then applied to high resolution GPS profiles of free surface elevation collected on the Negro river basin, a major contributor of the Amazon river. We propose two segmentations: a low-resolution one that can be used for basin hydrology and a higher resolution one better suited for local hydrodynamic studies.

  8. IAEA laboratory activities. The IAEA laboratories at Vienna and Seibersdorf, the International Laboratory of Marine Radioactivity at Monaco, the International Centre for Theoretical Physics at Trieste, the Middle Eastern Regional Radioisotope Centre for the Arab Countries. 2nd report

    International Nuclear Information System (INIS)

    1965-01-01

    This Second Report 'IAEA Laboratory Activities' describes developments and scientific work during the year 1964. It reports on the activities of the Agency's Laboratory Vienna - Seibersdorf, the Marine Biological Project at Monaco, and the Middle Eastern Regional Radioisotope Centre for the Arab Countries. In addition, it contains a first, short review on the International Centre for Theoretical Physics at Trieste. This Centre was established in October 1963 and started its operations in 1964. The Report is similar to the first one published at the beginning of 1964, and is intended as a source of current information

  9. Surface-Enhanced Raman Scattering Physics and Applications

    CERN Document Server

    Kneipp, Katrin; Kneipp, Harald

    2006-01-01

    Almost 30 years after the first reports on surface-enhanced Raman signals, the phenomenon of surface-enhanced Raman scattering (SERS) is now well established. Yet, explaining the enhancement of a spectroscopic signal by fouteen orders of magnitude continues to attract the attention of physicists and chemists alike. And, at the same time and rapidly growing, SERS is becoming a very useful spectroscopic tool with exciting applications in many fields. SERS gained particular interest after single-molecule Raman spectroscopy had been demonstrated. This bookl summarizes and discusses present theoretical approaches that explain the phenomenon of SERS and reports on new and exciting experiments and applications of the fascinating spectroscopic effect.

  10. Evaluation of a bioluminescence method, contact angle measurements and topography for testing the cleanability of plastic surfaces under laboratory conditions

    Science.gov (United States)

    Redsven, I.; Kymäläinen, H.-R.; Pesonen-Leinonen, E.; Kuisma, R.; Ojala-Paloposki, T.; Hautala, M.; Sjöberg, A.-M.

    2007-04-01

    Detection of adenosine triphosphate (ATP) by bioluminescence is used, for instance, in the food industry and in hospitals to assess the hygiene status of surfaces. The aim of this laboratory study was to investigate the feasibility of the ATP method for estimating the cleanability of resilient floor coverings from biological soil. The surfaces were worn using a Soiling and Wearing Drum Tester, and soiled and cleaned with an Erichsen Washability and Scrubbing Resistance Tester. In the laboratory test carried out with the bioluminescence method, most of the new and worn floor coverings that were biologically soiled were cleaned efficiently. According to this study, the semiquantitative ATP screening method can be used for hygiene monitoring of flooring materials. No correlation was found between cleanability and contact angles or surface topography measured using a profilometer. However, by revealing local irregularities and damage on surfaces, scanning electron micrographs appeared useful in explaining differences in cleanability.

  11. Use of TD ABC method for cost management in an accredited laboratory for physical and chemical testiry

    Directory of Open Access Journals (Sweden)

    Živković-Gabaldo Aleksandra N.

    2014-01-01

    Full Text Available Accreditation of a laboratory is verification of the competence of a laboratory regarding methods and procedures applied, personnel, the equipment used and working conditions. The main goal is establishment of customer trust in accuracy and precision of laboratory test results. Accredited laboratory has more specific costs than laboratory which is not accredited. To survive on the market, regardless the laboratory is independent or it is a part of a bigger system, the laboratory needs to establish resource management, especially effective cost management. Cost management describes approaches and short-term and long-term management activities, which make value for the customer, according to his known, reported or obligatory requirements and needs. In modern approach, there are different methods for cost calculation. One of them is ABC (Activity-Based Costing method which adds activity costs to products and services trough activities needed for their finalization. In this paper, there is presented improved ABC method for obračun costs, affirmed as activity based cost calculation based on time - TD ABC (Time-Driven Activity-Based Costing. The method uses time as a primary base for costs allocation on products, porudžbine, customers. This is the way for simpler and less expansive getting of information's about costs. This paper describes TD ABC method implemented in accredited Laboratory for physical and chemical testing, which is a part of company Galenika Fitofarmacija a.d. The scope of testing in this laboratory are pesticide materials, meaning technical substances and finished products, within quality control for different internal customers. By using TD ABC method it is possible to define real costs, generated during the laboratory testing, and also effectiveness of specific activities in this process.

  12. Toddler physical activity study: laboratory and community studies to evaluate accelerometer validity and correlates

    Directory of Open Access Journals (Sweden)

    Erin R. Hager

    2016-09-01

    Full Text Available Abstract Background Toddlerhood is an important age for physical activity (PA promotion to prevent obesity and support a physically active lifestyle throughout childhood. Accurate assessment of PA is needed to determine trends/correlates of PA, time spent in sedentary, light, or moderate-vigorous PA (MVPA, and the effectiveness of PA promotion programs. Due to the limited availability of objective measures that have been validated and evaluated for feasibility in community studies, it is unclear which subgroups of toddlers are at the highest risk for inactivity. Using Actical ankle accelerometry, the objectives of this study are to develop valid thresholds, examine feasibility, and examine demographic/ anthropometric PA correlates of MVPA among toddlers from low-income families. Methods Two studies were conducted with toddlers (12–36 months. Laboratory Study (n = 24- Two Actical accelerometers were placed on the ankle. PA was observed using the Child Activity Rating Scale (CARS, prescribed activities. Analyses included device equivalence reliability (correlation: activity counts of two Acticals, criterion-related validity (correlation: activity counts and CARS ratings, and sensitivity/specificity for thresholds. Community Study (n = 277, low-income mother-toddler dyads recruited- An Actical was worn on the ankle for > 7 days (goal >5, 24-h days. Height/weight was measured. Mothers reported demographics. Analyses included frequencies (feasibility and stepwise multiple linear regression (sMLR. Results Laboratory Study- Acticals demonstrated reliability (r = 0.980 and validity (r = 0.75. Thresholds demonstrated sensitivity (86 % and specificity (88 %. Community Study- 86 % wore accelerometer, 69 % had valid data (mean = 5.2 days. Primary reasons for missing/invalid data: refusal (14 % and wear-time ≤2 days (11 %. The MVPA threshold (>2200 cpm yielded 54 min/day. In sMLR, MVPA was associated with age (older

  13. Importance of physical vs. chemical interactions in surface shear rheology

    NARCIS (Netherlands)

    Wierenga, P.A.; Kosters, H.; Egmond, M.R.; Voragen, A.G.J.; Jongh, H.H.J. de

    2006-01-01

    The stability of adsorbed protein layers against deformation has in literature been attributed to the formation of a continuous gel-like network. This hypothesis is mostly based on measurements of the increase of the surface shear elasticity with time. For several proteins this increase has been

  14. Physical Characteristics of Laboratory Tested Concrete as a Substituion of Gravel on Normal Concrete

    Science.gov (United States)

    Butar-butar, Ronald; Suhairiani; Wijaya, Kinanti; Sebayang, Nono

    2018-03-01

    Concrete technology is highly potential in the field of construction for structural and non-structural construction. The amount uses of this concrete material raise the problem of solid waste in the form of concrete remaining test results in the laboratory. This waste is usually just discarded and not economically valuable. In solving the problem, this experiment was made new materials by using recycle material in the form of recycled aggregate which aims to find out the strength characteristics of the used concrete as a gravel substitution material on the normal concrete and obtain the value of the substitution composition of gravel and used concrete that can achieve the strength of concrete according to the standard. Testing of concrete characteristic is one of the requirements before starting the concrete mixture. This test using SNI method (Indonesian National Standard) with variation of comparison (used concrete : gravel) were 15: 85%, 25: 75%, 35:65%, 50:50 %, 75: 25%. The results of physical tests obtained the mud content value of the mixture gravel and used concrete is 0.03 larger than the standard of SNI 03-4142-1996 that is equal to 1.03%. so the need watering or soaking before use. The water content test results show an increase in the water content value if the composition of the used concrete increases. While the specific gravity value for variation 15: 85% until 35: 65% fulfilled the requirements of SNI 03-1969-1990. the other variasion show the specifics gravity value included on the type of light materials.

  15. Energy Programs at the Johns Hopkins University Applied Physics Laboratory, Quarterly Report, October-December 1980

    Energy Technology Data Exchange (ETDEWEB)

    None

    1980-12-01

    The Johns Hopkins University Applied Physics Laboratory is engaged in developing energy resources, utilization concepts, and monitoring and storage methods. This Quarterly Report summarizes the work on the various tasks as of 31 December 1980. The Energy Quarterly Report is divided into five sections. The first, Geothermal Energy Development Planning and Technical Assistance, supported by the Department of Energy/Division of Geothermal Energy (DOE/DGE), contains reports on the progress of geothermal-related tasks on which effort was concentrated during the quarter. The second section, Operational Research, Hydroelectric Power Development, supported by the Department of Energy/Resource Applications (DOE/RA), contains a report on institutional problems for small-scale hydroelectric power development in the southeastern states and a list of documents published by APL in the hydroelectric program and in the geothermal program, above. The third section, Seismotectonic Investigations, contains an article on work on the geologic structure of the Danbury Quadrangle that is supported by the Reactor Safety Research Division of the Nuclear Regulatory Commission (NRC) and an in-house supported study on a new method for assessing earthquakes in intraplate regions. The fourth section, Energy Conversion and Storage Techniques, contains four articles. The first is an evaluation of the Einstein refrigerator, supported by independent IR and D funds. The second concerns fly-wheel technology development at APL supported by the Department of Energy, Division of Energy Storage (DOE/STOR). The third is a report on APL energy conservation efforts at its own buildings, and the fourth is an article on liquefied natural gas (LNG) safety evaluation, supported by the National Academy of Sciences. The fifth section explores the value of establishing an Energy Research Institute at The Johns Hopkins University.

  16. Comet 67P/Churyumov-Gerasimenko Surface Composition as a Playground for Radiative Transfer Modeling and Laboratory Measurements: an international ISSI team

    Science.gov (United States)

    Stephan, K.; Ciarniello, M.; Beck, P.; Filacchione, G.; Moroz, L.; Pilorget, C.; Pommerol, A.; Quirico, E.; Raponi, A.; Schröder, S.; Kappel, D.; Vinogradoff, V.; Istiqomah, I.; Rousseau, B.

    2017-12-01

    Remote sensing observations at visible-infrared (VIS-IR) wavelengths of the nucleus of comet 67P/Churyumov-Gerasimenko performed by VIRTIS (Coradini et al., 2007) aboard the Rosetta mission have revealed a surface ubiquitously covered by low-albedo material (Capaccioni et al., 2015; Ciarniello et al., 2015), characterized by the presence of refractory and semi-volatile organics and dark opaque phases (Capaccioni et al., 2015; Quirico et al., 2016). However, a quantitative determination of the physical properties (grain size, porosity) and chemical composition of the surface regolith, from spectrophotometric analysis, is still missing. This subject will be investigated within an international team hosted by ISSI (International Space Science Institute), taking advantage of available and dedicated laboratory reflectance measurements on cometary analogue samples and radiative transfer models (Hapke, 2012; Shkuratov et al., 1999; Monte Carlo ray-tracing), applied to Rosetta spectrophotometric observations of the nucleus. The convergence between models and measurements will allow us to provide a thorough characterization of 67P/Churyumov-Gerasimenko surface. At the same time, the comparison of theoretical predictions with results from laboratory reflectance spectroscopy on powders of analog materials give us the possibility to constrain the capability of the models to characterize their composition (endmember abundances and mixing modalities) and physical properties. We report about the state of the art of laboratory reflectance spectroscopy and spectral modeling applied to 67P/Churyumov-Gerasimenko VIS-IR spectrum as well as preliminary results of the team activity and planned future work. Acknowledgements: the team thanks ISSI-Switzerland for the logistic and financial support.

  17. In the Physics Class: University Physics Students' Enactment of Class and Gender in the Context of Laboratory Work

    Science.gov (United States)

    Danielsson, Anna T.

    2014-01-01

    This article explores how the doing of social class and gender can intersect with the learning of science, through case studies of two male, working-class university students' constitutions of identities as physics students. In doing so, I challenge the taken-for-granted notion that male physics students have an unproblematic relation to…

  18. A prospective survey of air and surface fungal contamination in a medical mycology laboratory at a tertiary care university hospital.

    Science.gov (United States)

    Sautour, Marc; Dalle, Frédéric; Olivieri, Claire; L'ollivier, Coralie; Enderlin, Emilie; Salome, Elsa; Chovelon, Isabelle; Vagner, Odile; Sixt, Nathalie; Fricker-Pap, Véronique; Aho, Serge; Fontaneau, Olivier; Cachia, Claire; Bonnin, Alain

    2009-04-01

    Invasive filamentous fungi infections resulting from inhalation of mold conidia pose a major threat in immunocompromised patients. The diagnosis is based on direct smears, cultural symptoms, and culturing fungi. Airborne conidia present in the laboratory environment may cause contamination of cultures, resulting in false-positive diagnosis. Baseline values of fungal contamination in a clinical mycology laboratory have not been determined to date. A 1-year prospective survey of air and surface contamination was conducted in a clinical mycology laboratory during a period when large construction projects were being conducted in the hospital. Air was sampled with a portable air system impactor, and surfaces were sampled with contact Sabouraud agar plates. The collected data allowed the elaboration of Shewhart graphic charts. Mean fungal loads ranged from 2.27 to 4.36 colony forming units (cfu)/m(3) in air and from 0.61 to 1.69 cfu/plate on surfaces. Strict control procedures may limit the level of fungal contamination in a clinical mycology laboratory even in the context of large construction projects at the hospital site. Our data and the resulting Shewhart graphic charts provide baseline values to use when monitoring for inappropriate variations of the fungal contamination in a mycology laboratory as part of a quality assurance program. This is critical to the appropriate management of the fungal risk in hematology, cancer and transplantation patients.

  19. Princeton Plasma Physics Laboratory - 1995 Highlights. Fiscal Year 1995, 1 October 1994--30 September 1995

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1996-12-01

    The purpose of this Highlights Report is to present a brief overview of the Laboratory`s significant research accomplishments during the fiscal year 1995. The activities covered in this report include advances on the large projects, such as the discovery of the Enhanced Reversed Shear mode on the TFTR and the engineering design developments in the International Thermonuclear Experimental Reactor project, as well as the significant progress made in plasma theory, small-scale experiments, technology transfer, graduate education, and the Laboratory`s outreach program in science education.

  20. Overview of research in physics and health sciences at the Chalk River Nuclear Laboratories

    International Nuclear Information System (INIS)

    Milton, J.C.D.

    1988-01-01

    Toxicology research was a logical extension of existing program at Chalk River. Research in radiotoxicology has been going on there since the early forties. An overview of the existing physics and health sciences research programs operating at the Research Company of Atomic Energy of Canada Limited was presented. Programs in nuclear physics, heavy ion nuclear physics, astrophysical neutrino physics, condensed matter physics, fusion, biology, dosimetry, and environmental sciences were briefly described. In addition, a description of the research company organization was provided

  1. Experiment on Physical Desalinisation of Uranium-contaminated Gravel Surface

    International Nuclear Information System (INIS)

    Park, Uk-Ryang; Kim, Gye-Nam; Kim, Seung-Soo; Han, Gyu-Seong; Moon, Jai-Kwon

    2014-01-01

    As a result, the method to wash uranium-contaminated gravels could not get satisfactory desalinization rate. During the long oxidization process it was judged that uranium penetrated inside the gravels, so we tried to increase the desalinization rate by fragmentizing them into pieces and then washing them. The desalinization rate after fragmentizing the gravels into pieces and washing them brought a satisfactory result.. However, we could obtain desired concentration for gravels with high uranium concentration by fragmentizing them and breaking them further into even smaller pieces. Likewise, desalinization using soil washing process is complicated and has to go through multiple washing steps, resulting in too much of waste fluid generated accordingly. The increase of waste fluid generated leads to the increase in by-products of the final disposal process later on, bringing a not good economic result. Furthermore, taking into account that the desalinization rate is 65% during soil washing process, it is expected that gravel washing will show a similar desalinization result; it is considered uneasy to have a perfect desalinization only by soil washing. The grinding method is actually used in the primary desalinization process in order to desalinize radioactivity-contaminated concrete. This method does desalinization by grinding the radioactivity-contaminated area of the concrete surface with desalinization equipment, which enables a near-to-perfect desalinization for relatively thinly contaminated surface. Likewise, this research verified the degree of desalinization by applying the grinding method and comparing it to the fragmentizing-washing method, and attempted to find a method to desalinize uranium-contaminated gravels more effectively. In order to desalinize uranium-contaminated gravels more effectively and compare to the existing washing-desalinization method, we conducted a desalinization experiment with grinding method that grinds gravel surface. As a

  2. Neurocognitive performance and physical function do not change with physical-cognitive-mindfulness training in female laboratory technicians with chronic musculoskeletal pain

    DEFF Research Database (Denmark)

    Jay, Kenneth; Brandt, Mikkel; Schraefel, M. C.

    2016-01-01

    BACKGROUND: Cognitive and physical performance can be negatively affected by chronic pain. This study evaluates the effect of combined physical-, cognitive-, and mindfulness training (PCMT) on cognitive and physical performance. METHODS: From a large pharmaceutical company in Denmark we randomly...... allocated 112 female laboratory technicians with chronic upper limb pain to group-based PCMT at the worksite or a reference group for 10 weeks. Neurocognitive performance was measured by the computerized central nervous system vital signs neurocognitive assessment battery. Physical function was assessed...... in terms of shoulder external rotation strength and rate of force development in a custom-made dynamometer setup. RESULTS: No between-group differences (least square means [95% confidence interval]) from baseline to follow-up could be detected in any of the neurocognitive domains as measured by the central...

  3. Low Energy Neutrino Physics with sub-keV Ge-Detectors at Kuo-Sheng Neutrino Laboratory

    Science.gov (United States)

    Singh, Lakhwinder; Wong, H. T.; TEXONO Collaboration

    2017-09-01

    Germanium detectors with sub-keV sensitivities offer a unique opportunity to study neutrino interactions and properties, as well as search for light WIMP Dark Matter. The TEXONO Collaboration has been pursuing research program on low energy neutrino interactions and light WIMP Dark Matter at the Kuo-Sheng Neutrino Laboratory (KSNL) in Taiwan and in the China Jinping Underground Laboratory (CJPL) in China. We present highlights the physics program on the studies of neutrino electromagnetic interactions as well as neutrino-nucleus coherent elastic scattering.

  4. Using Live Tissue Laboratories to Promote Clinical Reasoning in Doctor of Physical Therapy Students

    Science.gov (United States)

    Moore, W. Allen; Noonan, Ann Cassidy

    2010-01-01

    Recently, the use of animal laboratories has decreased in medical and basic science programs due to lack of trained faculty members, student concerns about animal welfare, and the increased availability of inexpensive alternatives such as computer simulations and videos. Animal laboratories, however, have several advantages over alternative forms…

  5. Proceedings of the 1. Latin-American Colloquium of Surface Physics

    International Nuclear Information System (INIS)

    Majlis, N.; Anda, E.V.; Ure, J.E.; Selzer, S.; Lerner, E.; Koiller, B.; Costa, R.B. da.

    1981-10-01

    Several physical properties are discussed, reviewed and presented from studies in metal, liquid and solid surfaces. The adsorption effect is studied for a series of experimental and theoretical configuration. Experimental devices are also shown. (L.C.) [pt

  6. A mobile laboratory for surface and subsurface imaging in geo-hazard monitoring activity

    Science.gov (United States)

    Cornacchia, Carmela; Bavusi, Massimo; Loperte, Antonio; Pergola, Nicola; Pignatti, Stefano; Ponzo, Felice; Lapenna, Vincenzo

    2010-05-01

    A new research infrastructure for supporting ground-based remote sensing observations in the different phases of georisk management cycle is presented. This instrumental facility has been designed and realised by TeRN, a public-private consortium on Earth Observations and Natural Risks, in the frame of the project "ImpresAmbiente" funded by Italian Ministry of Research and University. The new infrastructure is equipped with ground-based sensors (hyperspectral cameras, thermal cameras, laser scanning and electromagnetic antennae) able to remotely map physical parameters and/or earth-surface properties (temperature, soil moisture, land cover, etc…) and to illuminate near-surface geological structures (fault, groundwater tables, landslide bodies etc...). Furthermore, the system can be used for non-invasive investigations of architectonic buildings and civil infrastructures (bridges, tunnel, road pavements, etc...) interested by natural and man-made hazards. The hyperspectral cameras can acquire high resolution images of earth-surface and cultural objects. They are operating in the Visible Near InfraRed (0.4÷1.0μm) with 1600 spatial pixel and 3.7nm of spectral sampling and in the Short Wave InfraRed (1.3÷2.5µm) spectral region with 320 spatial pixel and 5nm of spectral sampling. The IR cameras are operating in the Medium Wavelength InfraRed (3÷5µm; 640x512; NETDfield, as geology, architecture, environmental monitoring and cultural heritage. As a consequence, laser data can be useful integrated with traditional monitoring techniques. The Laser Scanner is characterized by very high data acquisition repetition rate up to 500.000 pxl/sec with a range resolution of 0.1 mm, vertical and horizontal FoV of 310° and 360° respectively with a resolution of 0.0018°. The system is also equipped with a metric camera allows to georeference the high resolution images acquired. The electromagnetic sensors allow to obtain in near real time high-resolution 2D and 3D subsurface

  7. Physical characterization of asteroid surfaces from photometric analysis

    Science.gov (United States)

    Helfenstein, P.; Veverka, J.

    1989-01-01

    The feasibility of using photometric models like Hapke's (1981, 1984, 1986) equation for deriving physical properties of asteroids from photometric observations is discussed. Using data for Ceres and Vesta, it is shown that the incomplete phase-angle coverage limits the reliable determination of Hapke's photometric parameters from asteroid disk-integrated phase curves (the second limitation is the nonsphericity of many asteroids). However, within this limitations, certain trends among asteroids can be compared. It is shown that there is a general similarity among the Hapke's parameters other than the h parameter, which characterizes the width of the opposition surge in terms of soil structure (porosity, particle-size distribution, and the rate of compaction with depth), derived for similar objects, e.g., average C asteroids and Ceres, and average S asteroids, 1982 Apollo, and Vesta.

  8. Hands-On Experiments in the Interactive Physics Laboratory: Students' Intrinsic Motivation and Understanding

    Science.gov (United States)

    Snetinová, Marie; Kácovský, Petr; Machalická, Jana

    2018-01-01

    Experiments in different forms can certainly be suitable tools for increasing student interest in physics. However, educators continuously discuss which forms of experimenting (if any) are the most beneficial for these purposes. At the Faculty of Mathematics and Physics, Charles University, Prague, two different forms of physics experiments are…

  9. Laboratory for materials analysis by nuclear analytical methods at Nuclear Physics Institute

    Czech Academy of Sciences Publication Activity Database

    Hnatowicz, Vladimír; Vacík, Jiří; Macková, Anna; Kučera, Jan

    2016-01-01

    Roč. 26, č. 2 (2016), s. 21-26 ISSN 1061-9127 R&D Projects: GA MŠk LM2015056 Institutional support: RVO:61389005 Keywords : Nuclear Physics Institute * IBA * NDP * NAA * PGAA Subject RIV: BG - Nuclear, Atomic and Molecular Physics, Colliders OBOR OECD: Nuclear physics

  10. Contribution of the radiation hygiene laboratories network in physical protection of radiation materials in Romania

    International Nuclear Information System (INIS)

    Milu, C.

    2002-01-01

    Full text: The Ministry of Health and Family from Romania has its own radiation protection network, including 23 radiation hygiene laboratories (RHLs), within the Institutes of Public Health-Bucharest, Iassy, Cluj-Napoca and Timisoara and the Directions of Public Health from Arges county, Bihor, Brasov, Mures, Maramures, Cluj, Sibiu, Harghita, Suceava, lassy, Bacau, Neamt, Galati, Constanta, Prahova, Dolj, Caras-Severin, Timis and Bucharest City. The RHLs network has 170 persons (physicians, physicists, engineers, chemists, biologists and technicians) and it is technically co-ordinated by the RHL in the Institute of Public Health-Bucharest. Within the local or national activities for physical protection of radioactive materials, the RHLs network closely co-operates with the Ministry of Internal Affairs (MAI) and with the nuclear regulatory authority, named the National Commission for Nuclear Activities Control (CNCAN). In the particular case of theft, sabotage or illicit traffic of radioactive materials, usually the MAI has the main role in the co-ordination of intervention actions of the three authorities. The RHLs network contributes by the expertise of its staff and by using its intervention facilities. The specific tasks for the RHLs network are: identification of the type and size of the radioactive material (by direct dosimetry and/or by gamma spectroscopy); dose reconstructions for the involved persons, the intervention personnel and the population; health management for overexposed persons and the medical response, including biological dosimetry and epidemiological studies. Recent special situations in this field, were: theft of some fuel (defect) tablets of natural uranium, from a production factory; the illicit traffic of radioactive materials, in transition to Western European Countries; an unauthorized decommissioning of a furnace, determining the uncontrolled dispersion of about 30 cobalt-60 sealed sources and the radiation exposure of nearly 20

  11. Impregnation/Agglomeration Laboratory Tests of Heavy Fuel from Prestige to Improve Its Manageability and Removal from Seawater Surface. (Physical Behaviour of Fuel Agglomates); Ensayos a Nivel de Laboratorio de Impregnacion/Aglomeracion del Fuel Procedente del Prestige para Facilitar su Manipulacion y Recogida en la Superficie del Mar (Comportamiento Fisico de los Aglomerados de Fuel)

    Energy Technology Data Exchange (ETDEWEB)

    Garcia Frutos, F. J.; Rodriguez, V.; Otero, J.

    2002-07-01

    The handling and removal problems showed by heavy fuel floating in seawater could be improved or solved by using materials that agglomerate it. These materials must fulfill the following condition: be inert materials in marine environment, the agglomerated fuel/material should float and its application and removal should be done using simple technologies. Based on these requirements, clay minerals, pine chips, mineral coal and charcoal were selected. The preliminary results on impregnation/agglomeration with the materials mentioned above of heavy fuel from Prestige at lab scale are presented in this paper. The results have shown that only hydrophobic materials, such as mineral coal and charcoal, are able to agglomerate with fuel, which is also a hydrophobic substance. Whereas the agglomerates fuel/mineral coal sink, the agglomerates fuel/charcoal keep floating on water surface. It can be concluded that the addition of charcoal on dispersed fuel in seawater could improve its handling and removal. In this sense, pilot scale and eventually controlled in situ tests to study the feasibility of the proposed solution should be performed. (Author) 2 refs.

  12. Physically plausible prescription of land surface model soil moisture

    Science.gov (United States)

    Hauser, Mathias; Orth, René; Thiery, Wim; Seneviratne, Sonia

    2016-04-01

    Land surface hydrology is an important control of surface weather and climate, especially under extreme dry or wet conditions where it can amplify heat waves or floods, respectively. Prescribing soil moisture in land surface models is a valuable technique to investigate this link between hydrology and climate. It has been used for example to assess the influence of soil moisture on temperature variability, mean and extremes (Seneviratne et al. 2006, 2013, Lorenz et al., 2015). However, perturbing the soil moisture content artificially can lead to a violation of the energy and water balances. Here we present a new method for prescribing soil moisture which ensures water and energy balance closure by using only water from runoff and a reservoir term. If water is available, the method prevents soil moisture decrease below climatological values. Results from simulations with the Community Land Model (CLM) indicate that our new method allows to avoid soil moisture deficits in many regions of the world. We show the influence of the irrigation-supported soil moisture content on mean and extreme temperatures and contrast our findings with that of earlier studies. Additionally, we will assess how long into the 21st century the new method will be able to maintain present-day climatological soil moisture levels for different regions. Lorenz, R., Argüeso, D., Donat, M.G., Pitman, A.J., den Hurk, B.V., Berg, A., Lawrence, D.M., Chéruy, F., Ducharne, A., Hagemann, S. and Meier, A., 2015. Influence of land-atmosphere feedbacks on temperature and precipitation extremes in the GLACE-CMIP5 ensemble. Journal of Geophysical Research: Atmospheres. Seneviratne, S.I., Lüthi, D., Litschi, M. and Schär, C., 2006. Land-atmosphere coupling and climate change in Europe. Nature, 443(7108), pp.205-209. Seneviratne, S.I., Wilhelm, M., Stanelle, T., Hurk, B., Hagemann, S., Berg, A., Cheruy, F., Higgins, M.E., Meier, A., Brovkin, V. and Claussen, M., 2013. Impact of soil moisture

  13. High-energy physics laboratory reaches out to Chicago-area neighbors

    CERN Multimedia

    Grady, W

    2004-01-01

    "A meeting this weekend with neighbors might be as important to the future of Fermi National Accelerator Laboratory as the improvements in recent years to exotic equipment that sends millions of subatomic particles whizzing through its tunnels" (1 page)

  14. 3D Printed Potential and Free Energy Surfaces for Teaching Fundamental Concepts in Physical Chemistry

    Science.gov (United States)

    Kaliakin, Danil S.; Zaari, Ryan R.; Varganov, Sergey A.

    2015-01-01

    Teaching fundamental physical chemistry concepts such as the potential energy surface, transition state, and reaction path is a challenging task. The traditionally used oversimplified 2D representation of potential and free energy surfaces makes this task even more difficult and often confuses students. We show how this 2D representation can be…

  15. Mg Isotope Inter-Laboratory Comparison of Reference Materials from Earth-Surface Low-Temperature Environments

    OpenAIRE

    Shalev, Netta; Farkas, Juraj; Fietzke, Jan; Novak, Martin; Schuessler, Jan A.; Pogge von Strandmann, Philip A.E; Törber, Philip B.

    2018-01-01

    To enable quality control of measurement procedures for determinations of Mg isotope amount ratios, expressed as δ26Mg and δ25Mg values, in Earth-surface studies, the δ26Mg and δ25Mg values of eight reference materials (RMs) were determined by inter-laboratory comparison between five laboratories and considering published data, if available. These matrix RMs, including river water SLRS-5, spring water NIST SRM 1640a, Dead Sea brine DSW-1, dolomites JDo-1 and CRM 512, limestone CRM 513, soil N...

  16. Institute of Geophysics and Planetary Physics (IGPP), Lawrence Livermore National Laboratory (LLNL): Quinquennial report, November 14-15, 1996

    Energy Technology Data Exchange (ETDEWEB)

    Tweed, J.

    1996-10-01

    This Quinquennial Review Report of the Lawrence Livermore National Laboratory (LLNL) branch of the Institute for Geophysics and Planetary Physics (IGPP) provides an overview of IGPP-LLNL, its mission, and research highlights of current scientific activities. This report also presents an overview of the University Collaborative Research Program (UCRP), a summary of the UCRP Fiscal Year 1997 proposal process and the project selection list, a funding summary for 1993-1996, seminars presented, and scientific publications. 2 figs., 3 tabs.

  17. Setting up the photoluminescence laboratory at ISOLDE & Perturbed Angular Correlation spectroscopy for BIO physics experiments using radioactive ions

    CERN Document Server

    Savva, Giannis

    2016-01-01

    The proposed project I was assigned was to set up the photoluminescence (PL) laboratory at ISOLDE, under the supervision of Karl Johnston. My first week at CERN coincided with the run of a BIO physics experiment using radioactive Hg(II) ions in which I also participated under the supervision of Stavroula Pallada. This gave me the opportunity to work in two projects during my stay at CERN and in the present report I describe briefly my contribution to them.

  18. KfK Laboratory for Aerosol Physics and Filter Technology. Progress report and development activities in 1990

    International Nuclear Information System (INIS)

    1991-03-01

    The activities undertaken by the laboratory for aerosol physics and filter technology (LAF) in 1990 under the following projects are described: (1) nuclear safety research (safety and material problems of fast breeders, IWR-oriented safety research); (2) pollutant control in the environment (communal waste management, emission-reducing processes, climate research - pollutants' behaviour in the atmosphere), and (3) radioactive waste management (basic work on reprocessing technologies). The annex lists the publications by the LAF staff. (BBR) [de

  19. Physically Accurate Soil Freeze-Thaw Processes in a Global Land Surface Scheme

    Science.gov (United States)

    Cuntz, Matthias; Haverd, Vanessa

    2014-05-01

    Transfer of energy and moisture in frozen soil, and hence the active layer depth, are strongly influenced by the soil freezing curve which specifies liquid moisture content as a function of temperature. However, the curve is typically not represented in global land surface models, with less physically-based approximations being used instead. In this work, we develop a physically accurate model of soil freeze-thaw processes, suitable for use in a global land surface scheme. We incorporated soil freeze-thaw processes into an existing detailed model for the transfer of heat, liquid water and water vapor in soils, including isotope diagnostics - Soil-Litter-Iso (SLI, Haverd & Cuntz 2010), which has been used successfully for water and carbon balances of the Australian continent (Haverd et al. 2013). A unique feature of SLI is that fluxes of energy and moisture are coupled using a single system of linear equations. The extension to include freeze-thaw processes and snow maintains this elegant coupling, requiring only coefficients in the linear equations to be modified. No impedance factor for hydraulic conductivity is needed because of the formulation by matric flux potential rather than pressure head. Iterations are avoided which results in the same computational speed as without freezing. The extended model is evaluated extensively in stand-alone mode (against theoretical predictions, lab experiments and field data) and as part of the CABLE global land surface scheme. SLI accurately solves the classical Stefan problem of a homogeneous medium undergoing a phase change. The model also accurately reproduces the freezing front, which is observed in laboratory experiments (Hansson et al. 2004). SLI was further tested against observations at a permafrost site in Tibet (Weismüller et al. 2011). It reproduces seasonal thawing and freezing of the active layer to within 3 K of the observed soil temperature and to within 10% of the observed volumetric liquid soil moisture

  20. Solar-wind ion interaction with carbonates on the surface of Ceres: Laboratory Experiments

    Science.gov (United States)

    Dukes, C. A.; Bu, C.; Lopez, G. R.; McFadden, L. A.; Ruesch, O.; Li, J. Y.

    2017-12-01

    Bright carbonates deposits on the dark background of Ceres have been identified by Dawn's VIR spectrometer [1, 2], with a composition that varies from Na2CO3 at Oxo crater and the Cerealia and Vinalia Faculae where carbonates are most abundant, to MgCO3 or CaCO3 in other regions [2, 3]. Solar-wind plasma impacts the surface of airless planetary bodies with 1 keV/amu H and He ( 107 ions cm-2 s-1at 2.8 A.U.), causing chemical and physical changes that influence the optical spectra. We investigate the stability of carbonate salts under ion irradiation, monitoring the spectral and compositional change. Anhydrous Na2CO3 (natrite) powders (grains 80% original material reflectance. Both hydrous and anhydrous Na2CO3 show blue/green radio-luminescence under ion impact. Ion-induced darkening of Ceres' natrite deposits is expected to occur on a time-scale of 100 - 1000 years, significantly less than the age of Cerealia facula 7 Ma [4]; darkening can be reversed by exposure to water vapor. For Ceres bright regions of varied albedo, this suggests that the brightest areas are the more recent deposits or the most recently exposed to water by upwelling, venting, or sublimation of subsurface ice [5]. [1] DeSanctis et al (2016) Nature 536, 54 - 57 [2] Palumbo et al (2016) LPSC 47, 2166 [3] Tosi et al (2016) DPS48, 511.06 [4] Nathues et al (2017) APJ 153, 112-124 [5] Titus (2015) GRL 42, 2130-2136

  1. FOOTWEAR PERFORMANCE LABORATORY

    Data.gov (United States)

    Federal Laboratory Consortium — This laboratory provides biomechanical and physical analyses for both military and commercial footwear. The laboratory contains equipment that is integral to the us...

  2. Identification of laboratory techniques to optimize Superpave HMA surface friction characteristics : final report, April 2010.

    Science.gov (United States)

    2010-04-15

    Wet pavement friction is known to be one of the most important roadway safety parameters. In this : research, frictional properties of flexible (asphalt) pavements were investigated. : As a part of this study, a laboratory device to polish asphalt sp...

  3. 2016 Final Reports from the Los Alamos National Laboratory Computational Physics Student Summer Workshop

    Energy Technology Data Exchange (ETDEWEB)

    Runnels, Scott Robert [Los Alamos National Lab. (LANL), Los Alamos, NM (United States); Bachrach, Harrison Ian [Los Alamos National Lab. (LANL), Los Alamos, NM (United States); Carlson, Nils [Los Alamos National Lab. (LANL), Los Alamos, NM (United States); Collier, Angela [Los Alamos National Lab. (LANL), Los Alamos, NM (United States); Dumas, William [Los Alamos National Lab. (LANL), Los Alamos, NM (United States); Fankell, Douglas [Los Alamos National Lab. (LANL), Los Alamos, NM (United States); Ferris, Natalie [Los Alamos National Lab. (LANL), Los Alamos, NM (United States); Gonzalez, Francisco [Los Alamos National Lab. (LANL), Los Alamos, NM (United States); Griffith, Alec [Los Alamos National Lab. (LANL), Los Alamos, NM (United States); Guston, Brandon [Los Alamos National Lab. (LANL), Los Alamos, NM (United States); Kenyon, Connor [Los Alamos National Lab. (LANL), Los Alamos, NM (United States); Li, Benson [Los Alamos National Lab. (LANL), Los Alamos, NM (United States); Mookerjee, Adaleena [Los Alamos National Lab. (LANL), Los Alamos, NM (United States); Parkinson, Christian [Los Alamos National Lab. (LANL), Los Alamos, NM (United States); Peck, Hailee [Los Alamos National Lab. (LANL), Los Alamos, NM (United States); Peters, Evan [Los Alamos National Lab. (LANL), Los Alamos, NM (United States); Poondla, Yasvanth [Los Alamos National Lab. (LANL), Los Alamos, NM (United States); Rogers, Brandon [Los Alamos National Lab. (LANL), Los Alamos, NM (United States); Shaffer, Nathaniel [Los Alamos National Lab. (LANL), Los Alamos, NM (United States); Trettel, Andrew [Los Alamos National Lab. (LANL), Los Alamos, NM (United States); Valaitis, Sonata Mae [Los Alamos National Lab. (LANL), Los Alamos, NM (United States); Venzke, Joel Aaron [Los Alamos National Lab. (LANL), Los Alamos, NM (United States); Black, Mason [Los Alamos National Lab. (LANL), Los Alamos, NM (United States); Demircan, Samet [Los Alamos National Lab. (LANL), Los Alamos, NM (United States); Holladay, Robert Tyler [Los Alamos National Lab. (LANL), Los Alamos, NM (United States)

    2016-09-22

    The two primary purposes of LANL’s Computational Physics Student Summer Workshop are (1) To educate graduate and exceptional undergraduate students in the challenges and applications of computational physics of interest to LANL, and (2) Entice their interest toward those challenges. Computational physics is emerging as a discipline in its own right, combining expertise in mathematics, physics, and computer science. The mathematical aspects focus on numerical methods for solving equations on the computer as well as developing test problems with analytical solutions. The physics aspects are very broad, ranging from low-temperature material modeling to extremely high temperature plasma physics, radiation transport and neutron transport. The computer science issues are concerned with matching numerical algorithms to emerging architectures and maintaining the quality of extremely large codes built to perform multi-physics calculations. Although graduate programs associated with computational physics are emerging, it is apparent that the pool of U.S. citizens in this multi-disciplinary field is relatively small and is typically not focused on the aspects that are of primary interest to LANL. Furthermore, more structured foundations for LANL interaction with universities in computational physics is needed; historically interactions rely heavily on individuals’ personalities and personal contacts. Thus a tertiary purpose of the Summer Workshop is to build an educational network of LANL researchers, university professors, and emerging students to advance the field and LANL’s involvement in it.

  4. 2015 Final Reports from the Los Alamos National Laboratory Computational Physics Student Summer Workshop

    Energy Technology Data Exchange (ETDEWEB)

    Runnels, Scott Robert [Los Alamos National Lab. (LANL), Los Alamos, NM (United States); Caldwell, Wendy [Arizona State Univ., Mesa, AZ (United States); Brown, Barton Jed [Los Alamos National Lab. (LANL), Los Alamos, NM (United States); Pederson, Clark [Los Alamos National Lab. (LANL), Los Alamos, NM (United States); Brown, Justin [Univ. of California, Santa Cruz, CA (United States); Burrill, Daniel [Univ. of Vermont, Burlington, VT (United States); Feinblum, David [Univ. of California, Irvine, CA (United States); Hyde, David [SLAC National Accelerator Lab., Menlo Park, CA (United States). Stanford Institute for Materials and Energy Science (SIMES); Levick, Nathan [Univ. of New Mexico, Albuquerque, NM (United States); Lyngaas, Isaac [Florida State Univ., Tallahassee, FL (United States); Maeng, Brad [Univ. of Michigan, Ann Arbor, MI (United States); Reed, Richard LeRoy [Los Alamos National Lab. (LANL), Los Alamos, NM (United States); Sarno-Smith, Lois [Univ. of Michigan, Ann Arbor, MI (United States); Shohet, Gil [Univ. of Illinois, Urbana-Champaign, IL (United States); Skarda, Jinhie [Los Alamos National Lab. (LANL), Los Alamos, NM (United States); Stevens, Josey [Missouri Univ. of Science and Technology, Rolla, MO (United States); Zeppetello, Lucas [Columbia Univ., New York, NY (United States); Grossman-Ponemon, Benjamin [Stanford Univ., CA (United States); Bottini, Joseph Larkin [Los Alamos National Lab. (LANL), Los Alamos, NM (United States); Loudon, Tyson Shane [Los Alamos National Lab. (LANL), Los Alamos, NM (United States); VanGessel, Francis Gilbert [Los Alamos National Lab. (LANL), Los Alamos, NM (United States); Nagaraj, Sriram [Los Alamos National Lab. (LANL), Los Alamos, NM (United States); Price, Jacob [Univ. of Washington, Seattle, WA (United States)

    2015-10-15

    The two primary purposes of LANL’s Computational Physics Student Summer Workshop are (1) To educate graduate and exceptional undergraduate students in the challenges and applications of computational physics of interest to LANL, and (2) Entice their interest toward those challenges. Computational physics is emerging as a discipline in its own right, combining expertise in mathematics, physics, and computer science. The mathematical aspects focus on numerical methods for solving equations on the computer as well as developing test problems with analytical solutions. The physics aspects are very broad, ranging from low-temperature material modeling to extremely high temperature plasma physics, radiation transport and neutron transport. The computer science issues are concerned with matching numerical algorithms to emerging architectures and maintaining the quality of extremely large codes built to perform multi-physics calculations. Although graduate programs associated with computational physics are emerging, it is apparent that the pool of U.S. citizens in this multi-disciplinary field is relatively small and is typically not focused on the aspects that are of primary interest to LANL. Furthermore, more structured foundations for LANL interaction with universities in computational physics is needed; historically interactions rely heavily on individuals’ personalities and personal contacts. Thus a tertiary purpose of the Summer Workshop is to build an educational network of LANL researchers, university professors, and emerging students to advance the field and LANL’s involvement in it. This report includes both the background for the program and the reports from the students.

  5. A Useful Demonstration of Calculus in a Physics High School Laboratory

    Science.gov (United States)

    Alvarez, Gustavo; Schulte, Jurgen; Stockton, Geoffrey; Wheeler, David

    2018-01-01

    The real power of calculus is revealed when it is applied to actual physical problems. In this paper, we present a calculus inspired physics experiment suitable for high school and undergraduate programs. A model for the theory of the terminal velocity of a falling body subject to a resistive force is developed and its validity tested in an…

  6. ‘PhysTrack’: a Matlab based environment for video tracking of kinematics in the physics laboratory

    Science.gov (United States)

    Umar Hassan, Muhammad; Sabieh Anwar, Muhammad

    2017-07-01

    In the past two decades, several computer software tools have been developed to investigate the motion of moving bodies in physics laboratories. In this article we report a Matlab based video tracking library, PhysTrack, primarily designed to investigate kinematics. We compare PhysTrack with other commonly available video tracking tools and outline its salient features. The general methodology of the whole video tracking process is described with a step by step explanation of several functionalities. Furthermore, results of some real physics experiments are also provided to demonstrate the working of the automated video tracking, data extraction, data analysis and presentation tools that come with this development environment. We believe that PhysTrack will be valuable for the large community of physics teachers and students already employing Matlab.

  7. ASYMPTOTICAL CALCULATION OF ELECTROMAGNETIC WAVES SCATTERED FROM A DIELECTRIC COATED CYLINDRICAL SURFACE WITH PHYSICAL OPTICS APPROACH

    Directory of Open Access Journals (Sweden)

    Uğur YALÇIN

    2004-02-01

    Full Text Available In this study, quasi-optical scattering of finite source electromagnetic waves from a dielectric coated cylindrical surface is analysed with Physical Optics (PO approach. A linear electrical current source is chosen as the finite source. Reflection coefficient of the cylindrical surface is derived by using Geometrical Theory of Diffraction (GTD. Then, with the help of this coefficient, fields scattered from the surface are obtained. These field expressions are used in PO approach and surface scattering integral is determined. Evaluating this integral asymptotically, fields reflected from the surface and surface divergence coefficient are calculated. Finally, results obtained in this study are evaluated numerically and effects of the surface impedance to scattered fields are analysed. The time factor is taken as j te? in this study.

  8. An Industrial Educational Laboratory at Ducati Foundation: Narrative Approaches to Mechanics Based upon Continuum Physics

    Science.gov (United States)

    Corni, Federico; Fuchs, Hans U.; Savino, Giovanni

    2018-01-01

    This is a description of the conceptual foundations used for designing a novel learning environment for mechanics implemented as an "Industrial Educational Laboratory"--called Fisica in Moto (FiM)--at the Ducati Foundation in Bologna. In this paper, we will describe the motivation for and design of the conceptual approach to mechanics…

  9. The Rolling with Slipping Experiment in the Virtual Physics Laboratory--Context-Based Teaching Material

    Science.gov (United States)

    Maidana, Nora L.; da Fonseca, Monaliza; Barros, Suelen F.; Vanin, Vito R.

    2016-01-01

    The Virtual Laboratory was created as a complementary educational activity, with the aim of working abstract concepts from an experimental point of view. In this work, the motion of a ring rolling and slipping in front of a grid printed panel was recorded. The frames separated from this video received a time code, and the resulting set of images…

  10. Some aspects about the increase of the tasks and abilities in the Quantum Physics Laboratory

    International Nuclear Information System (INIS)

    Soto Moran, R.L.; Marin, E.; Hernandez, M.

    1991-01-01

    The analysis of improving the accomplishment of the educational process at the Laboratory, by means of the introduction of tasks which involve data acquisition and processing of gamma radiation spectrum, using a multi channel analyzer, designed and constructed for teaching purposes, has been done in this paper

  11. A useful demonstration of calculus in a physics high school laboratory

    Science.gov (United States)

    Alvarez, Gustavo; Schulte, Jurgen; Stockton, Geoffrey; Wheeler, David

    2018-01-01

    The real power of calculus is revealed when it is applied to actual physical problems. In this paper, we present a calculus inspired physics experiment suitable for high school and undergraduate programs. A model for the theory of the terminal velocity of a falling body subject to a resistive force is developed and its validity tested in an experiment of a falling magnet in a column of self-induced eddy currents. The presented method combines multiple physics concepts such as 1D kinematics, classical mechanics, electromagnetism and non-trivial mathematics. It offers the opportunity for lateral as well as project-based learning.

  12. Upgrade of detectors of neutron instruments at Neutron Physics Laboratory in Rez

    Czech Academy of Sciences Publication Activity Database

    Litvinenko, E. I.; Ryukhtin, Vasyl; Bogdzel, A. A.; Churakov, A. V.; Farkas, G.; Hervoches, Charles; Lukáš, Petr; Pilch, Jan; Šaroun, Jan; Strunz, Pavel; Zhuravlev, V. V.

    2017-01-01

    Roč. 841, JAN (2017), s. 5-11 ISSN 0168-9002 R&D Projects: GA MŠk LG14004; GA MŠk LM2015056; GA ČR GB14-36566G Institutional support: RVO:68378271 ; RVO:61389005 Keywords : neutron scattering * gaseous position-sensitive detector * delay line readout Subject RIV: BM - Solid Matter Physics ; Magnetism; JG - Metallurgy (FZU-D) OBOR OECD: Condensed matter physics (including formerly solid state physics, supercond.); Materials engineering (FZU-D) Impact factor: 1.362, year: 2016

  13. Physically-based Surface Texture Synthesis Using a Coupled Finite Element System.

    Science.gov (United States)

    Bajaj, Chandrajit; Zhang, Yongjie; Xu, Guoliang

    2008-01-01

    This paper describes a stable and robust finite element solver for physically-based texture synthesis over arbitrary manifold surfaces. Our approach solves the reaction-diffusion equation coupled with an anisotropic diffusion equation over surfaces, using a Galerkin based finite element method (FEM). This method avoids distortions and discontinuities often caused by traditional texture mapping techniques, especially for arbitrary manifold surfaces. Several varieties of textures are obtained by selecting different values of control parameters in the governing differential equations, and furthermore enhanced quality textures are generated by fairing out noise in input surface meshes.

  14. Physical and chemical characterization methods of surfaces and interfaces; Methodes de caracterisation physico-chimique des surfaces et des interfaces

    Energy Technology Data Exchange (ETDEWEB)

    Barthes-Labrousse, M.G. [Centre d`Etudes de Chimie Metallurgique, 94 - Vitry-sur-Seine (France)

    1997-12-31

    The main physical and chemical characterization techniques of surfaces and interfaces are presented. There are: Auger electron spectroscopy, photoelectron spectroscopies (XPS and UPS), secondary ions mass spectroscopy (SIMS), infrared and Raman spectroscopies, electron energy loss spectroscopy (EELS and HREELS) and atomic force microscopy (AFM). For each method is given the theoretical principle, the apparatus and the main uses of the techniques. (O.M.) 27 refs.

  15. Performance Characteristics of HYDRA - a Multi-Physics simulation code from Lawrence Livermore National Laboratory

    Energy Technology Data Exchange (ETDEWEB)

    Langer, Steven H. [Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States); Karlin, Ian [Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States); Marinak, Marty M. [Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)

    2014-01-09

    HYDRA is used to simulate a variety of experiments carried out at the National Ignition Facility (NIF) [4] and other high energy density physics facilities. HYDRA has packages to simulate radiation transfer, atomic physics, hydrodynamics, laser propagation, and a number of other physics effects. HYDRA has over one million lines of code and includes both MPI and thread-level (OpenMP and pthreads) parallelism. This paper measures the performance characteristics of HYDRA using hardware counters on an IBM BlueGene/Q system. We report key ratios such as bytes/instruction and memory bandwidth for several different physics packages. The total number of bytes read and written per time step is also reported. We show that none of the packages which use significant time are memory bandwidth limited on a Blue Gene/Q. HYDRA currently issues very few SIMD instructions. The pressure on memory bandwidth will increase if high levels of SIMD instructions can be achieved.

  16. A Laboratory Exercise in Physics: Determining Single Capacitances and Series and Parallel Combinations of Capacitance.

    Science.gov (United States)

    Schlenker, Richard M.

    This document presents a series of physics experiments which allow students to determine the value of unknown electrical capacitors. The exercises include both parallel and series connected capacitors. (SL)

  17. The european Laboratory for particle physics uses a new documental system created by a UGR researcher

    CERN Multimedia

    Ruiz, Antonio

    2006-01-01

    "The growing digitalization of traditional libraries and the increase of scientific production, like in the fields of high energies physics, have leaded to consider the manual indexing systems to be obsolete, as they are unviable in practice." (1 page)

  18. A Novel General Chemistry Laboratory: Creation of Biomimetic Superhydrophobic Surfaces through Replica Molding

    Science.gov (United States)

    Verbanic, Samuel; Brady, Owen; Sanda, Ahmed; Gustafson, Carolina; Donhauser, Zachary J.

    2014-01-01

    Biomimetic replicas of superhydrophobic lotus and taro leaf surfaces can be made using polydimethylsiloxane. These replicas faithfully reproduce the microstructures of the leaves' surface and can be analyzed using contact angle goniometry, self-cleaning experiments, and optical microscopy. These simple and adaptable experiments were used to…

  19. The impact of educational intervention on physical activity, nutrition and laboratory parameters in type II diabetic patients.

    Science.gov (United States)

    Maheri, Aghbabak; Asnaashari, Maryam; Joveini, Hamid; Tol, Azar; Firouzian, Ali Asghar; Rohban, Alireza

    2017-04-01

    Diabetes is one of the most common chronic diseases that is now widely spread around the world, and day by day the number of patients is increasing. The purpose of this study was to determine the impact of educational intervention on physical activity, nutrition and laboratory parameters in type 2 diabetic patients. This semi-experimental study was performed from March to October 2015 on 100 patients with type 2 diabetes who referred to the Niknejad health center. The type of sampling was simple random. Data were collected using a questionnaire including demographic questions, assessment of nutritional status and physical activity, history of diabetes, physical measurements and laboratory parameters of patients. Data were analyzed using SPSS 16, and descriptive and analytical tests (paired-samples t-test) and the results were significant at the level of (pintervention, while the variables of FBS level (pintervention. According to the findings of this study, to improve BMI, fish intake, type of oil consumption and also increased daily fruit and vegetable intake in these patients, a variety of educational-supportive interventions are recommended.

  20. Laboratory measurement of the interface pressures applied by active therapy support surfaces: a consensus document.

    Science.gov (United States)

    2010-02-01

    A key element in pressure ulcer prevention and management is the selection of appropriate pressure redistributing (PR) patient support surfaces for use while seated and in bed. However little explicit guidance exists allowing standardised quantitative comparison of different PR surfaces based upon their ability to redistribute pressure from anatomical landmarks such as the heels and sacrum. In 2008 a working group was established in Europe through the US National Pressure Ulcer Advisory Panel (NPUAP) support surface standardisation initiative (S3I) and under the aegis of the European Pressure Ulcer Advisory Panel with the specific remit of developing test methods for the evaluation of active therapy support surfaces (alternating pressure air mattresses). This report describes a consensus development process to agree test methods appropriate to compare active therapy surfaces based upon their ability to redistribute pressure from the sacrum and the heels. Copyright 2009 Tissue Viability Society. Published by Elsevier Ltd. All rights reserved.

  1. From Beetles in Nature to the Laboratory: Actuating Underwater Locomotion on Hydrophobic Surfaces.

    Science.gov (United States)

    Pinchasik, Bat-El; Steinkühler, Jan; Wuytens, Pieter; Skirtach, Andre G; Fratzl, Peter; Möhwald, Helmuth

    2015-12-29

    The controlled wetting and dewetting of surfaces is a primary mechanism used by beetles in nature, such as the ladybird and the leaf beetle for underwater locomotion.1 Their adhesion to surfaces underwater is enabled through the attachment of bubbles trapped in their setae-covered legs. Locomotion, however, is performed by applying mechanical forces in order to move, attach, and detach the bubbles in a controlled manner. Under synthetic conditions, however, when a bubble is bound to a surface, it is nearly impossible to maneuver without the use of external stimuli. Thus, actuated wetting and dewetting of surfaces remain challenges. Here, electrowetting-on-dielectric (EWOD) is used for the manipulation of bubble-particle complexes on unpatterned surfaces. Bubbles nucleate on catalytic Janus disks adjacent to a hydrophobic surface. By changing the wettability of the surface through electrowetting, the bubbles show a variety of reactions, depending on the shape and periodicity of the electrical signal. Time-resolved (μs) imaging of bubble radial oscillations reveals possible mechanisms for the lateral mobility of bubbles on a surface under electrowetting: bubble instability is induced when electric pulses are carefully adjusted. This instability is used to control the surface-bound bubble locomotion and is described in terms of the change in surface energy. It is shown that a deterministic force applied normal can lead to a random walk of micrometer-sized bubbles by exploiting the phenomenon of contact angle hysteresis. Finally, bubble use in nature for underwater locomotion and the actuated bubble locomotion presented in this study are compared.

  2. Inhibition of surface crystallisation of amorphous indomethacin particles in physical drug-polymer mixtures

    DEFF Research Database (Denmark)

    Priemel, Petra A; Laitinen, Riikka; Barthold, Sarah

    2013-01-01

    or Soluplus(®) in 3:1, 1:1 and 1:3 (w/w) ratios were stored at 30°C and 23 or 42% RH. Samples were analysed during storage by X-ray powder diffraction, thermogravimetric analysis, differential scanning calorimetry, and scanning electron microscopy (SEM). IMC Eudragit(®) mixtures showed higher physical......Surface coverage may affect the crystallisation behaviour of amorphous materials. This study investigates crystallisation inhibition in powder mixtures of amorphous drug and pharmaceutical excipients. Pure amorphous indomethacin (IMC) powder and physical mixtures thereof with Eudragit(®) E...... through reduced IMC surface molecular mobility. Polymer particles may also mechanically hinder crystal growth outwards from the surface. This work highlights the importance of microparticulate surface coverage of amorphous drug particles on their stability....

  3. Biomimetic surface-conducting silicone rubber obtained by physical deposition of MWCNT

    International Nuclear Information System (INIS)

    Zylka, Pawel

    2015-01-01

    The paper presents a minimal approach to produce superhydrophobic, surface-conducting silicone rubber with a strongly developed surface modified with multiwall carbon nanotubes partially embedded in the silicone elastic matrix. The modification was achieved by physical deposition of carbon nanotube powder on a semi-liquid silicone rubber surface prior to its cross-linking. The resulting biomimetic material displayed superhydrophobic properties (static wetting angle >160°, sliding angle ∼10°), as well as elevated electric surface resistance (surface resistivity approx 18 kΩ). A piezoresistive hysteretic response with nonmonotonic change of the surface resistance accompanying substantial linear stretching was also demonstrated in the developed specimens displaying negative resistance change in a broad range of extension ratios, making them applicable as highly compliant, large-specific-area electrodes. (paper)

  4. Physics Laboratory Measurements Workshop Based on LabVIEW and NI ELVIS

    Science.gov (United States)

    Tso, Sandra

    2010-03-01

    This hands-on workshop will explore the blended approach of using National Instruments' LabVIEW graphical programming language with computer-based data acquisition devices like the NI ELVIS, to explore modern experimental physics in demonstration experiments and student labs. Learn how LabVIEW can be used to deliver a project-based approach to teaching physics; and how NI ELVIS with a suite of 12 instruments (oscilloscope, function generator, digital multimeter, power supply and more) integrated into a small form factor to provide a hands-on learning system. You will walk away from this workshop with a high-level understanding of LabVIEW's application to physics for teaching and research, the basics of how LabVIEW and NI ELVIS work together, and working knowledge of using NI ELVIS soft front panels to make measurements. Limited to 18 participants - 3 hours - Cost 2.00

  5. The Horonobe Underground Research Laboratory (Tentative name) Project. A program on survey and research performed from earth surface

    International Nuclear Information System (INIS)

    2001-03-01

    The Horonobe Underground Research Laboratory (Tentative name) Project under planning at Horonobe-machi by the Japan Nuclear Cycle Development Institute (JNC) is a research facility on deep underground shown in the Long-term program on research, development and application of nuclear energy (June, 1994)' (LPNE), where some researches on the deep underground targeted at sedimentary rocks are carried out. The plan on The Horonobe Underground Research Laboratory performed at Horonobe-machi' is an about 20 years plan ranging from beginning to finishing of its survey and research, which is carried out by three steps such as 'Survey and research performed from earth surface', 'Survey and research performed under excavation of road', and Survey and research performed by using the road'. The Horonobe Underground Research Laboratory is one of research facilities on deep underground shown its importance in LPNE, and carries out some researches on the deep underground at a target of the sedimentary rocks. And also The Horonobe Underground Research Laboratory confirms some technical reliability and support on stratum disposal shown in the 'Technical reliability on stratum disposal of the high level radioactive wastes. The Second Progress Report of R and D on geological disposal' summarized on November, 1999 by JNC through actual tests and researches at the deep stratum. The obtained results are intended to reflect to disposal business of The Horonobe Underground Research Laboratory and safety regulation and so on performed by the government, together with results of stratum science research, at the Tono Geoscience Center, of geological disposal R and D at the Tokai Works, or of international collaborations. For R and D at the The Horonobe Underground Research Laboratory after 2000, following subjects are shown: 1) Survey technique on long-term stability of geological environment, 2) Survey technique on geological environment, 3) Engineering technique on engineered barrier and

  6. Integrated ICT System for Teaching Physical Sciences in a Robotic Laboratory

    Directory of Open Access Journals (Sweden)

    Spyros Kopsidas

    2009-11-01

    Full Text Available The Information and Communication Technologies provide economically feasible and effective means to assist individuals with kinetic disabilities in numerous activities concerning educational purposes. As the technology is increasingly used in everyday environments, an early response of the existing methods to teach the Physical Sciences to individuals with kinetic disabilities is our innovative system. The work presented in this article is part of the “Smart and Adaptable Information System for Supporting Physics Experiments in a Robotic Laboratory” (SAIS-PEaRL research project.

  7. Physical fracture properties (fracture surfaces as information sources; crackgrowth and fracture mechanisms; exemples of cracks)

    International Nuclear Information System (INIS)

    Meny, Lucienne.

    1979-06-01

    Fracture surfaces are considered as a useful source of informations: an introduction to fractography is presented; the fracture surface may be observed through X ray microanalysis, and other physical methods such as Auger electron spectroscopy or secundary ion emission. The mechanisms of macroscopic and microscopic crackgrowth and fracture are described, in the case of unstable fracture (cleavage, ductile with shear, intergranular brittleness) and of progressive crack propagation (creep, fatigue). Exemples of cracks are presented in the last chapter [fr

  8. Educational and laboratory base for the expert training on physical protection of nuclear materials: the requirements and experience of practical implementation

    International Nuclear Information System (INIS)

    Bondarev, P.V.; Pogozhin, N.S.; Ryzhukhin, D.V.; Tolstoy, A.I.

    2002-01-01

    Full text: In expert training on physical protection of nuclear materials (NMPP) an educational and laboratory base has special importance. In these laboratories the students receive practical skills concerning physical protection systems (PPS). The basic requirements for creating such base are formulated in a certain educational program implemented at an educational institution. Thus it is necessary to take into account the following features of a modern nuclear object PPS: restriction of an object visiting with the purpose of acquaintance with features of a certain object PPS; dynamical change of PPS component nomenclature; increase of use of computer facilities for managing all PPS subsystems; increase of integration degree of separate subsystems in a uniform PPS complex; high cost of PPS components. Taking that into consideration a university, which assumes to begin the expert training on NMPP, is compelled to solve the following tasks: creation of its own laboratory base. The implementation of practical occupations with visiting a nuclear object cannot be executed practically; definition of quantity and structure of educational laboratories. Thus the features of the implemented educational plan should be taken into account in addition; optimization of expenses on laboratory creation. The regular updating of laboratory equipment structure is impossible in a practical manner. Therefore unique correct decision is to supply laboratories with the equipment, which uses the typical technological decisions on performing the basic PPS functions (detection, delay, estimation of a situation, neutralization); development of laboratory work conducting procedures (laboratory practical works); technical support of the created laboratories. The certain experience of solving the listed tasks is accumulated at the Moscow Engineering Physics Institute (State University) (MEPhl) while implementing 'Physical Protection, Control and Accountability of Nuclear Materials' master

  9. Quantification of Soil Physical Properties by Using X-Ray Computerized Tomography (CT) and Standard Laboratory (STD) Methods

    Energy Technology Data Exchange (ETDEWEB)

    Sanchez, Maria Ambert [Iowa State Univ., Ames, IA (United States)

    2003-12-12

    The implementation of x-ray computerized tomography (CT) on agricultural soils has been used in this research to quantify soil physical properties to be compared with standard laboratory (STD) methods. The overall research objective was to more accurately quantify soil physical properties for long-term management systems. Two field studies were conducted at Iowa State University's Northeast Research and Demonstration Farm near Nashua, IA using two different soil management strategies. The first field study was conducted in 1999 using continuous corn crop rotation for soil under chisel plow with no-till treatments. The second study was conducted in 2001 and on soybean crop rotation for the same soil but under chisel plow and no-till practices with wheel track and no-wheel track compaction treatments induced by a tractor-manure wagon. In addition, saturated hydraulic (K{sub s}) conductivity and the convection-dispersion (CDE) model were also applied using long-term soil management systems only during 2001. The results obtained for the 1999 field study revealed no significant differences between treatments and laboratory methods, but significant differences were found at deeper depths of the soil column for tillage treatments. The results for standard laboratory procedure versus CT method showed significant differences at deeper depths for the chisel plow treatment and at the second lower depth for no-till treatment for both laboratory methods. The macroporosity distribution experiment showed significant differences at the two lower depths between tillage practices. Bulk density and percent porosity had significant differences at the two lower depths of the soil column. The results obtained for the 2001 field study showed no significant differences between tillage practices and compaction practices for both laboratory methods, but significant differences between tillage practices with wheel track and no-wheel compaction treatments were found along the soil

  10. Changes in Ultrasonic Velocity from Fluid Substitution, Calculated with Laboratory Methods, Digital Rock Physics, and Biot Theory

    Science.gov (United States)

    Goldfarb, E. J.; Ikeda, K.; Tisato, N.

    2017-12-01

    Seismic and ultrasonic velocities of rocks are function of several variables including fluid saturation and type. Understanding the effect of each variable on elastic waves can be valuable when using seismic methods for subsurface modeling. Fluid type and saturation are of specific interest to volcanology, water, and hydrocarbon exploration. Laboratory testing is often employed to understand the effects of fluids on elastic waves. However, laboratory testing is expensive and time consuming. It normally requires cutting rare samples into regular shapes. Fluid injection can also destroy specimens as removing the fluid after testing can prove difficult. Another option is theoretical modeling, which can be used to predict the effect of fluids on elastic properties, but it is often inaccurate. Alternatively, digital rock physics (DRP) can be used to investigate the effect of fluid substitution. DRP has the benefit of being non invasive, as it does not require regular sample shapes or fluid injection. Here, we compare the three methods for dry and saturated Berea sandstone to test the reliability of DRP. First, ultrasonic velocities were obtained from laboratory testing. Second, for comparison, we used a purely theoretical approach - i.e., Hashin-Shtrikman and Biot theory - to estimate the wave speeds at dry and wet conditions. Third, we used DRP. The dry sample was scanned with micro Computed Tomography (µCT), and a three dimensional (3D) array was recorded. We employed a segmentation-less method to convert each 3D array value to density, porosity, elastic moduli, and wave speeds. Wave propagation was simulated numerically at similar frequency as the laboratory. To simulate fluid substitution, we numerically substituted air values for water and repeated the simulation. The results from DRP yielded similar velocities to the laboratory, and accurately predicted the velocity change from fluid substitution. Theoretical modeling could not accurately predict velocity, and

  11. Pacific Northwest Laboratory: Annual report for 1986 to the DOE Office of Energy Research: Part 4, Physical sciences

    Energy Technology Data Exchange (ETDEWEB)

    Toburen, L.H.

    1987-02-01

    This 1986 annual report from Pacific Northwest Laboratory describes research in environment, health, and safety conducted during fiscal year 1986. The report again consists of five parts, each in a separate volume. Part 4 includes those programs funded under the title ''Physical and Technological Research.'' The Field Task Program Studies reports in this document are grouped by budget category and each section is introduced by an abstract that indicates the Field Task Proposal/Agreement reported in that section. These reports only briefly indicate progress made during 1985.

  12. Pacific Northwest Laboratory: Annual report for 1986 to the DOE Office of Energy Research: Part 4, Physical sciences

    International Nuclear Information System (INIS)

    Toburen, L.H.

    1987-02-01

    This 1986 annual report from Pacific Northwest Laboratory describes research in environment, health, and safety conducted during fiscal year 1986. The report again consists of five parts, each in a separate volume. Part 4 includes those programs funded under the title ''Physical and Technological Research.'' The Field Task Program Studies reports in this document are grouped by budget category and each section is introduced by an abstract that indicates the Field Task Proposal/Agreement reported in that section. These reports only briefly indicate progress made during 1985

  13. Particle Size Measurements From the First Fundamentals of Ice Crystal Icing Physics Test in the NASA Propulsion Systems Laboratory

    Science.gov (United States)

    King, Michael C.; Bachalo, William; Kurek, Andrzej

    2017-01-01

    This paper presents particle measurements by the Artium Technologies, Inc. Phase Doppler Interferometer and High Speed Imaging instruments from the first Fundamental Ice Crystal Icing Physics test conducted in the NASA Propulsion Systems Laboratory. The work focuses on humidity sweeps at a larger and a smaller median volumetric diameter. The particle size distribution, number density, and water content measured by the Phase Doppler Interferometer and High Speed Imaging instruments from the sweeps are presented and compared. The current capability for these two instruments to measure and discriminate ICI conditions is examined.

  14. Pacific Northwest Laboratory annual report for 1985 to the DOE Office of Energy Research. Part 4. Physical sciences

    Energy Technology Data Exchange (ETDEWEB)

    Toburen, L.H.

    1986-02-01

    Part 4 of the Pacific Northwest Laboratory Annual Report for 1985 to the DOE Office of Energy Research includes those programs funded under the title ''Physical and Technological Research.'' The Field Task Program Studies reports in this document are grouped by budget category and each section is introduced by an abstract that indicates the Field Task Proposal/Agreement reported in that section. These reports only briefly indicate progress made during 1985. The reader should contact the principal investigators named or examine the publications cited for more details.

  15. Pacific Northwest Laboratory, annual report for 1983 to the DOE Office of Energy Research. Part 4. Physical sciences

    International Nuclear Information System (INIS)

    1984-02-01

    Part 4 of the Pacific Northwest Laboratory Annual Report for 1983 to the Office of Energy Research, includes those programs funded under the title Physical and Technological Research. The Field Task Program Studies reports in this document are grouped under the subheadings and each section is introduced by a divider page that indicates the Field Task Agreement reported in that section. These reports only briefly indicate progress made during 1983. The reader should contact the principal investigators named or examine the publications cited for more details

  16. Pacific Northwest Laboratory Annual Report for 1987 to the DOE Office of Energy Research: Part 4, Physical Sciences

    Energy Technology Data Exchange (ETDEWEB)

    Toburen, L.H.

    1988-06-01

    This 1987 annual report from Pacific Northwest Laboratory describes research in environment, health, and safety conducted during fiscal year 1987. The report again consists of five parts, each in a separate volume. Part 4 includes those programs funded under the title ''Physical and Technological Research.'' The Field Task Program Studies reports in this document are grouped by budget category and each section is introduced by an abstract that indicates the Field Task Proposal/Agreement reported in that section.

  17. Pacific Northwest Laboratory, annual report for 1983 to the DOE Office of Energy Research. Part 4. Physical sciences

    Energy Technology Data Exchange (ETDEWEB)

    1984-02-01

    Part 4 of the Pacific Northwest Laboratory Annual Report for 1983 to the Office of Energy Research, includes those programs funded under the title Physical and Technological Research. The Field Task Program Studies reports in this document are grouped under the subheadings and each section is introduced by a divider page that indicates the Field Task Agreement reported in that section. These reports only briefly indicate progress made during 1983. The reader should contact the principal investigators named or examine the publications cited for more details.

  18. Pacific Northwest Laboratory annual report for 1985 to the DOE Office of Energy Research. Part 4. Physical sciences

    International Nuclear Information System (INIS)

    Toburen, L.H.

    1986-02-01

    Part 4 of the Pacific Northwest Laboratory Annual Report for 1985 to the DOE Office of Energy Research includes those programs funded under the title ''Physical and Technological Research.'' The Field Task Program Studies reports in this document are grouped by budget category and each section is introduced by an abstract that indicates the Field Task Proposal/Agreement reported in that section. These reports only briefly indicate progress made during 1985. The reader should contact the principal investigators named or examine the publications cited for more details

  19. Velocity and stage data collected in a laboratory flume for water-surface slope determination using a pipe manometer

    Science.gov (United States)

    Lee, Jonathan K.; Visser, H.M.; Jenter, H.L.; Duff, M.P.

    2000-01-01

    U.S. Geological Survey (USGS) hydrologists and ecologist are conducting studies to quantify vegetative flow resistance in order to improve numerical models of surface-water flow in the Florida Everglades. Water-surface slope is perhaps the most difficult of the flow resistance parameters to measure in the Everglades due to the very low gradients of the topography and flow. In an effort to measure these very small slopes, a unique pipe manometer was developed for the local measurement of water-surface slopes on the order of 1 centimeter per kilometer (cm/km). According to theory, a very precise measurement of centerline velocity obtained inside the pipe manometer should serve as a unique proxy for water-surface slope in the direction of the pipe axis. In order to confirm this theoretical relationship and calibrate the pipe manometer, water-surface elevation and pipe centerline velocity data were simultaneously measured in a set of experiments carried out in the tilting flume at the USGS Hydraulic Laboratory Facility at Stennis Space Center, Mississippi. A description of the instrumentation and methods used to evaluate this technique for measuring water-surface slope as well as a summary of the entire data set is presented.

  20. Concrete-Ice Abrasion: Laboratory Studies using a Sawn Concrete Surfac

    OpenAIRE

    Shamsutdinova, Guzel; Hendriks, Max; Jacobsen, Stefan

    2017-01-01

    Concrete-ice abrasion is a surface degradation mechanism due to ice-structure interaction especially relevant for concrete gravity-based structures in the Arctic offshore. Experiment is the main evaluation method for concrete durability against ice abrasion. The paper presents NTNUs lab facilities and a 4 km concrete-ice abrasion test between a sawn concrete surface with fc cube = 110 MPa and unidirectionally grown fresh water ice. Results demonstrate the load cells response, coefficient of f...

  1. Design and Reflection Help Students Develop Scientific Abilities: Learning in Introductory Physics Laboratories

    Science.gov (United States)

    Etkina, Eugenia; Karelina, Anna; Ruibal-Villasenor, Maria; Rosengrant, David; Jordan, Rebecca; Hmelo-Silver, Cindy E.

    2010-01-01

    Design activities, when embedded in an inquiry cycle and appropriately scaffolded and supplemented with reflection, can promote the development of the habits of mind (scientific abilities) that are an important part of scientific practice. Through the Investigative Science Learning Environment ("ISLE"), students construct physics knowledge by…

  2. Audiovisual Physics Reports: Students' Video Production as a Strategy for the Didactic Laboratory

    Science.gov (United States)

    Pereira, Marcus Vinicius; de Souza Barros, Susana; de Rezende Filho, Luiz Augusto C.; de A. Fauth, Leduc Hermeto

    2012-01-01

    Constant technological advancement has facilitated access to digital cameras and cell phones. Involving students in a video production project can work as a motivating aspect to make them active and reflective in their learning, intellectually engaged in a recursive process. This project was implemented in high school level physics laboratory…

  3. Gender Gaps and Gendered Action in a First-Year Physics Laboratory

    Science.gov (United States)

    Day, James; Stang, Jared B.; Holmes, N. G.; Kumar, Dhaneesh; Bonn, D. A.

    2016-01-01

    It is established that male students outperform female students on almost all commonly used physics concept inventories. However, there is significant variation in the factors that contribute to the gap, as well as the direction in which they influence it. It is presently unknown if such a gender gap exists on the relatively new Concise Data…

  4. Annual report of the Laboratory for Condensed Matter Physics, and the Biophysics Group

    International Nuclear Information System (INIS)

    1986-01-01

    Research on photoemission and photoluminescence in quantum wells; photoemission assisted by electric fields; the electrochemistry of the semiconductor-electrolyte interface; MESFET's; fractal physics; amorphous silicon; superionic and mixed conductors; solids chemistry and NMR; internal motion of nucleic acids; cardiophysiology; imaging of microscopic internal motions; and Ap4A metabolism is presented [fr

  5. Blending Physical and Virtual Manipulatives: An Effort to Improve Students' Conceptual Understanding through Science Laboratory Experimentation

    Science.gov (United States)

    Olympiou, Georgios; Zacharia, Zacharias C.

    2012-01-01

    This study aimed to investigate the effect of experimenting with physical manipulatives (PM), virtual manipulatives (VM), and a blended combination of PM and VM on undergraduate students' understanding of concepts in the domain of "Light and Color." A pre-post comparison study design was used for the purposes of this study that involved 70…

  6. Laboratory of neutron activation analysis at the Nuclear Physics Institute ASCR, Řež

    Czech Academy of Sciences Publication Activity Database

    Kučera, Jan

    2011-01-01

    Roč. 21, č. 1 (2011), s. 30-35 ISSN 1061-9127 Institutional research plan: CEZ:AV0Z10480505 Keywords : Instrumental neutron activation analysis * epithermal neutron activation analysis * radiochemical neutron activation analysis * applications in science and technology Subject RIV: BG - Nuclear, Atomic and Molecular Physics, Colliders

  7. Applications of the Meteorite Physical Properties Data Obtained Using Mobile Laboratory Facility

    Czech Academy of Sciences Publication Activity Database

    Kohout, Tomáš; Elbra, T.; Pesonen, L. J.; Schnabl, Petr; Šlechta, Stanislav

    2006-01-01

    Roč. 41, č. 8 (2006), s. 98-98 ISSN 1086-9379. [Annual Meeting of the Meteoritical Society /69./. 06.08.2006-11.08.2006, Zurich] Institutional research plan: CEZ:AV0Z30130516 Keywords : physical properties * meteorite * harmless methods Subject RIV: DE - Earth Magnetism, Geodesy, Geography

  8. The Relation between Students' Communicative Moves during Laboratory Work in Physics and Outcomes of Their Actions

    Science.gov (United States)

    Andersson, J.; Enghag, M.

    2017-01-01

    In this case study, we explore students' communication during practical work in physics at an upper secondary school in Sweden from a sociocultural perspective. We investigate the relation between the interaction and content of students' communication and outcomes of their actions, with the purpose of finding new knowledge for informing teachers…

  9. Annual report of the Laboratory of Condensed Matter Physics, and the Biophysics Group, 1985

    International Nuclear Information System (INIS)

    1987-01-01

    Research on photoemission and photoluminescence in quantum wells; photoemission assisted by electric fields; the electrochemistry of the semiconductor-electrolyte interface; transport properties of MESFET's; fractal physics; amorphous silicon; superionic and mixed conductors; solids chemistry and NMR; internal motion of nucleic acids; cardiophysiology; imaging of microscopic internal motions; and Ap4A metabolism is presented [fr

  10. Physics with fast molecular-ion beams. Proceedings of workshop held at Argonne National Laboratory, August 20-21, 1979

    International Nuclear Information System (INIS)

    Gemmell, D.S.

    1979-01-01

    The Workshop on Physics with Fast Molecular-Ion Beams was held in the Physics Division, Argonne National Laboratory on August 20 and 21, 1979. The meeting brought together representatives from several groups studying the interactions of fast (MeV) molecular-ion beams with matter. By keeping the Workshop program sharply focussed on current work related to the interactions of fast molecular ions, it was made possible for the participants to engage in vigorous and detailed discussions concerning such specialized topics as molecular-ion dissociation and transmission, wake effects, ionic charge states, cluster stopping powers, beam-foil spectroscopy, electron-emissions studies with molecular-ion beams, and molecular-ion structure determinations

  11. Radiological, physical, and chemical characterization of low-level alpha contaminated wastes stored at the Idaho National Engineering Laboratory

    International Nuclear Information System (INIS)

    Apel, M.L.; Becker, G.K.; Ragan, Z.K.; Frasure, J.; Raivo, B.D.; Gale, L.G.; Pace, D.P.

    1994-03-01

    This document provides radiological, physical, and chemical characterization data for low-level alpha-contaminated radioactive and low-level alpha-contaminated radioactive and hazardous (i.e., mixed) wastes stored at the Idaho National Engineering Laboratory and considered for treatment under the Private Sector Participation Initiative Program. Waste characterization data are provided in the form of INEL Waste Profile Sheets. These documents provide, for each content code, information on waste identification, waste description, waste storage configuration, physical/chemical waste composition, radionuclide and associated alpha activity waste characterization data, and hazardous constituents present in the waste. Information is provided for 97 waste streams which represent an estimated total volume of 25,450 m 3 corresponding to a total mass of approximately 12,000,000 kg. In addition, considerable information concerning alpha, beta, gamma, and neutron source term data specific to Rocky Flats-generated waste forms stored at the INEL are provided to assist in facility design specification

  12. Radiological, physical, and chemical characterization of low-level alpha contaminated wastes stored at the Idaho National Engineering Laboratory

    Energy Technology Data Exchange (ETDEWEB)

    Apel, M.L.; Becker, G.K.; Ragan, Z.K.; Frasure, J.; Raivo, B.D.; Gale, L.G.; Pace, D.P.

    1994-03-01

    This document provides radiological, physical, and chemical characterization data for low-level alpha-contaminated radioactive and low-level alpha-contaminated radioactive and hazardous (i.e., mixed) wastes stored at the Idaho National Engineering Laboratory and considered for treatment under the Private Sector Participation Initiative Program. Waste characterization data are provided in the form of INEL Waste Profile Sheets. These documents provide, for each content code, information on waste identification, waste description, waste storage configuration, physical/chemical waste composition, radionuclide and associated alpha activity waste characterization data, and hazardous constituents present in the waste. Information is provided for 97 waste streams which represent an estimated total volume of 25,450 m 3 corresponding to a total mass of approximately 12,000,000 kg. In addition, considerable information concerning alpha, beta, gamma, and neutron source term data specific to Rocky Flats-generated waste forms stored at the INEL are provided to assist in facility design specification.

  13. Measurement of the sound absorption coefficient for an advanced undergraduate physics laboratory

    Science.gov (United States)

    Macho-Stadler, E.; Elejalde-García, M. J.

    2017-09-01

    We present a simple experiment that allows advanced undergraduates to learn the basics of the acoustic properties of materials. The impedance tube-standing wave method is applied to study the normal absorption coefficient of acoustics insulators. The setup includes a tube, a speaker, a microphone, a digital function generator and an oscilloscope, material available in an undergraduate laboratory. Results of the change of the absorption coefficient with the frequency, the sample thickness and the sample density are analysed and compared with those obtained with a commercial system.

  14. Argonne National Laboratory Physics Division annual report, January--December 1996

    Energy Technology Data Exchange (ETDEWEB)

    Thayer, K.J. [ed.

    1997-08-01

    The past year has seen several of the Physics Division`s new research projects reach major milestones with first successful experiments and results: the atomic physics station in the Basic Energy Sciences Research Center at the Argonne Advanced Photon Source was used in first high-energy, high-brilliance x-ray studies in atomic and molecular physics; the Short Orbit Spectrometer in Hall C at the Thomas Jefferson National Accelerator (TJNAF) Facility that the Argonne medium energy nuclear physics group was responsible for, was used extensively in the first round of experiments at TJNAF; at ATLAS, several new beams of radioactive isotopes were developed and used in studies of nuclear physics and nuclear astrophysics; the new ECR ion source at ATLAS was completed and first commissioning tests indicate excellent performance characteristics; Quantum Monte Carlo calculations of mass-8 nuclei were performed for the first time with realistic nucleon-nucleon interactions using state-of-the-art computers, including Argonne`s massively parallel IBM SP. At the same time other future projects are well under way: preparations for the move of Gammasphere to ATLAS in September 1997 have progressed as planned. These new efforts are imbedded in, or flowing from, the vibrant ongoing research program described in some detail in this report: nuclear structure and reactions with heavy ions; measurements of reactions of astrophysical interest; studies of nucleon and sub-nucleon structures using leptonic probes at intermediate and high energies; atomic and molecular structure with high-energy x-rays. The experimental efforts are being complemented with efforts in theory, from QCD to nucleon-meson systems to structure and reactions of nuclei. Finally, the operation of ATLAS as a national users facility has achieved a new milestone, with 5,800 hours beam on target for experiments during the past fiscal year.

  15. Argonne National Laboratory Physics Division annual report, January--December 1996

    International Nuclear Information System (INIS)

    Thayer, K.J.

    1997-08-01

    The past year has seen several of the Physics Division's new research projects reach major milestones with first successful experiments and results: the atomic physics station in the Basic Energy Sciences Research Center at the Argonne Advanced Photon Source was used in first high-energy, high-brilliance x-ray studies in atomic and molecular physics; the Short Orbit Spectrometer in Hall C at the Thomas Jefferson National Accelerator (TJNAF) Facility that the Argonne medium energy nuclear physics group was responsible for, was used extensively in the first round of experiments at TJNAF; at ATLAS, several new beams of radioactive isotopes were developed and used in studies of nuclear physics and nuclear astrophysics; the new ECR ion source at ATLAS was completed and first commissioning tests indicate excellent performance characteristics; Quantum Monte Carlo calculations of mass-8 nuclei were performed for the first time with realistic nucleon-nucleon interactions using state-of-the-art computers, including Argonne's massively parallel IBM SP. At the same time other future projects are well under way: preparations for the move of Gammasphere to ATLAS in September 1997 have progressed as planned. These new efforts are imbedded in, or flowing from, the vibrant ongoing research program described in some detail in this report: nuclear structure and reactions with heavy ions; measurements of reactions of astrophysical interest; studies of nucleon and sub-nucleon structures using leptonic probes at intermediate and high energies; atomic and molecular structure with high-energy x-rays. The experimental efforts are being complemented with efforts in theory, from QCD to nucleon-meson systems to structure and reactions of nuclei. Finally, the operation of ATLAS as a national users facility has achieved a new milestone, with 5,800 hours beam on target for experiments during the past fiscal year

  16. An investigation of the use of microcomputer-based laboratory simulations in promoting conceptual understanding in secondary physics instruction

    Science.gov (United States)

    Tomshaw, Stephen G.

    Physics education research has shown that students bring alternate conceptions to the classroom which can be quite resistant to traditional instruction methods (Clement, 1982; Halloun & Hestenes, 1985; McDermott, 1991). Microcomputer-based laboratory (MBL) experiments that employ an active-engagement strategy have been shown to improve student conceptual understanding in high school and introductory university physics courses (Thornton & Sokoloff, 1998). These (MBL) experiments require a specialized computer interface, type-specific sensors (e.g. motion detectors, force probes, accelerometers), and specialized software in addition to the standard physics experimental apparatus. Tao and Gunstone (1997) have shown that computer simulations used in an active engagement environment can also lead to conceptual change. This study investigated 69 secondary physics students' use of computer simulations of MBL activities in place of the hands-on MBL laboratory activities. The average normalized gain in students' conceptual understanding was measured using the Force and Motion Conceptual Evaluation (FMCE). Student attitudes towards physics and computers were probed using the Views About Science Survey (VASS) and the Computer Attitude Scale (CAS). While it may be possible to obtain an equivalent level of conceptual understanding using computer simulations in combination with an active-engagement environment, this study found no significant gains in students' conceptual understanding ( = -0.02) after they completed a series of nine simulated experiments from the Tools for Scientific Thinking curriculum (Thornton & Sokoloff, 1990). The absence of gains in conceptual understanding may indicate that either the simulations were ineffective in promoting conceptual change or problems with the implementation of the treatment inhibited its effectiveness. There was a positive shift in students' attitudes towards physics in the VASS dimensions of structure and reflective thinking, while

  17. Fluid Mechanics Experiments as a Unifying Theme in the Physics Instrumentation Laboratory Course

    Science.gov (United States)

    Borrero-Echeverry, Daniel

    2017-11-01

    We discuss the transformation of a junior-level instrumentation laboratory course from a sequence of cookbook lab exercises to a semester-long, project-based course. In the original course, students conducted a series of activities covering the usual electronics topics (amplifiers, filters, oscillators, logic gates, etc.) and learned basic LabVIEW programming for data acquisition and analysis. Students complained that these topics seemed disconnected and not immediately applicable to ``real'' laboratory work. To provide a unifying theme, we restructured the course around the design, construction, instrumentation of a low-cost Taylor-Couette cell where fluid is sheared between rotating coaxial cylinders. The electronics labs were reworked to guide students from fundamental electronics through the design and construction of a stepper motor driver, which was used to actuate the cylinders. Some of the legacy labs were replaced with a module on computer-aided design (CAD) in which students designed parts for the apparatus, which they then built in the departmental machine shop. Signal processing topics like spectral analysis were introduced in the context of time-series analysis of video data acquired from flow visualization. The course culminated with a capstone project in which students conducted experiments of their own design on a variety of topics in rheology and nonlinear dynamics.

  18. Cross-flow turbines: progress report on physical and numerical model studies at large laboratory scale

    Science.gov (United States)

    Wosnik, Martin; Bachant, Peter

    2016-11-01

    Cross-flow turbines show potential in marine hydrokinetic (MHK) applications. A research focus is on accurately predicting device performance and wake evolution to improve turbine array layouts for maximizing overall power output, i.e., minimizing wake interference, or taking advantage of constructive wake interaction. Experiments were carried with large laboratory-scale cross-flow turbines D O (1 m) using a turbine test bed in a large cross-section tow tank, designed to achieve sufficiently high Reynolds numbers for the results to be Reynolds number independent with respect to turbine performance and wake statistics, such that they can be reliably extrapolated to full scale and used for model validation. Several turbines of varying solidity were employed, including the UNH Reference Vertical Axis Turbine (RVAT) and a 1:6 scale model of the DOE-Sandia Reference Model 2 (RM2) turbine. To improve parameterization in array simulations, an actuator line model (ALM) was developed to provide a computationally feasible method for simulating full turbine arrays inside Navier-Stokes models. Results are presented for the simulation of performance and wake dynamics of cross-flow turbines and compared with experiments and body-fitted mesh, blade-resolving CFD. Supported by NSF-CBET Grant 1150797, Sandia National Laboratories.

  19. New instruments for soil physics class: Improving the laboratory and field seminars

    Science.gov (United States)

    Klipa, Vladimir; Jankovec, Jakub; Snehota, Michal

    2014-05-01

    Teaching soil science and soil physics is an important part of the curriculum of many programs with focus on technical and natural sciences. Courses of soil science and namely soil physics have a long tradition at the faculty of Civil Engineering of the Czech Technical University in Prague. Students receive the theoretical foundations about soil classification, soil physics, soil chemistry and soil hydraulic characteristics in the course. In practical seminars students perform measurements of physical, hydraulic and chemical characteristics of soils, thus a comprehensive survey of soil is done in the given site. So far, students had the opportunity to use old, manually operated instrumentation. The project aims to improve the attractiveness of soil physics course and to extend the practical skills of students by introducing new tasks and by involving modern automated equipment. New instruments were purchased with the support of the Ministry of Education, Youth and Sports of the Czech Republic under the project FRVS No. 1162/2013 G1. Specifically, two tensiometers T8 with multi-functional handheld read-out unit (UMS, GmbH) and manual Mini Disk Infiltrometer (Decagon Devices, Inc.) were purchased and incorporated into the course. In addition, newly designed MultiDisk the automated mini disk Infiltrometer (CTU in Prague) and combined temperature and soil moisture TDT sensor TMS 2 (TOMST®, s.r.o.), were made freely available for soil physics classes and included into the courses. Online tutorials and instructional videos were developed. Detailed multimedia teaching materials were introduced so that students are able to work more independently. Students will practice operating the digital tensiometer T8 with integrated temperature sensor and manual Mini Disk Infiltrometer (diameter disk: 4.4 cm, suction range: 0.5 to 7.0 cm of suction) and MultiDisk the automated mini disk Infiltrometer (see Klipa et al., EGU2014-7230) and combined temperature and soil moisture TDT

  20. Physical mechanism of surface roughening on the radial core-shell nanowire heterostructure with alloy shell

    Science.gov (United States)

    Cao, Yuanyuan; Diao, Dongfeng

    2017-05-01

    We proposed a quantitative thermodynamic theory to address the physical process of surface roughening during the epitaxial growth of core-shell NW with alloy layer. The surface roughening origins from the transformation of the Frank-van der Merwe (FM) mode to the Stranski-Krastanow (SK) mode. In addition to the radius of NW core, the composition and thickness of alloy shell could determine the growth behaviors due to their modulation to the strain. The established theoretical model not only explains the surface roughening caused by the alloy shell layer, but also provides a new way to control the growth of core-shell NW.

  1. Physical mechanism of surface roughening on the radial core-shell nanowire heterostructure with alloy shell

    Directory of Open Access Journals (Sweden)

    Yuanyuan Cao

    2017-05-01

    Full Text Available We proposed a quantitative thermodynamic theory to address the physical process of surface roughening during the epitaxial growth of core-shell NW with alloy layer. The surface roughening origins from the transformation of the Frank-van der Merwe (FM mode to the Stranski-Krastanow (SK mode. In addition to the radius of NW core, the composition and thickness of alloy shell could determine the growth behaviors due to their modulation to the strain. The established theoretical model not only explains the surface roughening caused by the alloy shell layer, but also provides a new way to control the growth of core-shell NW.

  2. THE EFFECTS OF CRACKING ON THE SURFACE POTENTIAL OF ICY GRAINS IN SATURN’S E-RING: LABORATORY STUDIES

    Energy Technology Data Exchange (ETDEWEB)

    Bu, Caixia; Bahr, David A.; Dukes, Catherine A.; Baragiola, Raúl A., E-mail: cb8nw@virginia.edu [Laboratory for Astrophysics and Surface Physics, Materials Science and Engineering, University of Virginia, Charlottesville, VA 22904 (United States)

    2016-07-10

    Within Saturn's E-ring, dust grains are coated by water vapor co-released with ice grains from the geyser-like eruptions of Enceladus. These ice-coated grains have intrinsic surface potential and interact synergistically with the ions and electrons of Saturn's magnetospheric plasmas. We perform laboratory experiments to investigate the effects of water-ice growth on the surface potential, using amorphous solid water (ASW) films. We estimate the growth of the surface potential to be ∼ 2.5 mV (Earth) yr{sup 1} and 112 mV yr{sup 1} for E-ring grains at ∼4.5 R {sub s} and 3.95 R {sub s} outside Enceladus’s plume, respectively. In addition, our measurements show that the linear relationship between the surface potential and the film thickness, as described in previous studies, has an upper limit, where the film spontaneously cracks above a porosity-dependent critical thickness. Heating of the cracked films with (and without) deposited charge shows that significant positive (and negative) surface potentials are retained at temperatures above 110 K, contrary to the minimal values (roughly zero) for thin, transparent ASW films. The significant surface potentials observed on micron-scale cracked ice films after thermal cycling, (5–20) V, are consistent with Cassini measurements, which indicate a negative charge of up to 5 V for E-ring dust particles at ∼5 R {sub s}. Therefore, the native grain surface potential resulting from water-vapor coating must be included in modeling studies of interactions between E-ring icy surfaces and Saturn's magnetospheric plasma.

  3. Princeton Plasma Physics Laboratory annual report, October 1, 1991--September 30, 1992

    Energy Technology Data Exchange (ETDEWEB)

    1992-12-31

    This report discusses the following topics: Principal parameters achieved in experimental devices for fiscal year 1992; tokamak fusion test reactor; princeton beta experiment-modification; current drive experiment-upgrade; tokamak physics experiment/steady-state advanced tokamak; international thermonuclear experimental reactor; international collaboration; x-ray laser studies; plasma processing: Deposition and etching of thin films; pure electron plasma experiments; theoretical studies; tokamak modeling; high-field magnet project; engineering department; environment, safety, and health and quality assurance; technology transfer; office of human resources and administration; PPPL invention disclosures for fiscal year 1992; office of resource management; graduate education: plasma physics; graduate education: program in plasma science and technology; and science education program.

  4. Princeton Plasma Physics Laboratory annual report, October 1, 1991--September 30, 1992

    International Nuclear Information System (INIS)

    1992-01-01

    This report discusses the following topics: Principal parameters achieved in experimental devices for fiscal year 1992; tokamak fusion test reactor; princeton beta experiment-modification; current drive experiment-upgrade; tokamak physics experiment/steady-state advanced tokamak; international thermonuclear experimental reactor; international collaboration; x-ray laser studies; plasma processing: Deposition and etching of thin films; pure electron plasma experiments; theoretical studies; tokamak modeling; high-field magnet project; engineering department; environment, safety, and health and quality assurance; technology transfer; office of human resources and administration; PPPL invention disclosures for fiscal year 1992; office of resource management; graduate education: plasma physics; graduate education: program in plasma science and technology; and science education program

  5. Laboratory Experiments to Simulate and Investigate the Physics Underlying the Dynamics of Merging Solar Corona Structures

    Science.gov (United States)

    2016-06-05

    described analytic Grad-Shafranov toroidal equilibria where the pressure on the magnetic axis is lower than the pres- sure external to the toroid so...2015. Magnetic axis safety factor of finite beta spheromaks and transition from spheromaks to toroidal magnetic bubbles. Physics of Plasmas, 22(2...Paccagnella, Roberto. 2015. Magnetic axis safety factor of finite beta spheromaks and transition from spheromaks to toroidal magnetic bubbles

  6. Laboratory activities and physics learning at high school: an exploratory study in portuguese settings

    Directory of Open Access Journals (Sweden)

    Margarida Saraiva-Neves

    2006-12-01

    Full Text Available In this paper we present findings of an exploratory study, included in a wider investigation which intends to promote meaningful learning of physics concepts, based on experimental work and supported by metacognition tools. The aim of this research was to recognize promoting learning situations in Physics lab. Interviews and questionnaires were applied to teachers and students from four Lisbon high schools. Results show that lab work in physics has a low frequency and, generally, has a demonstration format. Both teachers and students recognize potentialities of lab work to promote learning. Learning is poor when students just observe and/or accomplish commands. Both teachers and students consider the relation theory/experimentation and students doing themselves as fundamental to achieve better learning. In addition to pointing out several problems concerning lab work, teachers envisage it in a very traditional way. So, innovative strategies and methodologies, such as computer use and open-ended problems, pointed by research in science investigation as promoting learning, are left aside.

  7. Determining the Quantum Efficiency for Activation of an Organometallic Photoinitiator for Cationic Polymerization: An Experiment for the Physical or Inorganic Chemistry Laboratory

    Science.gov (United States)

    Hayes, David M.; Mahar, Maura; Schnabel, R. Chris; Shah, Paras; Lees, Alistair J.; Jakubek, Vladimir

    2007-01-01

    We present a new laboratory experiment on the photochemistry of organometallic [eta][superscript 5],[eta][superscript 6]-mixed-sandwich compounds, which is suitable for both the physical chemistry and inorganic chemistry laboratory. Specifically, students use 1,10-phenanthroline to trap the intermediate formed when…

  8. Central Laboratory of X-ray and Electron Microscopy Research at the Institute of Physics of the Polish Academy of Sciences, Warsaw

    International Nuclear Information System (INIS)

    Zymierska, D.

    2008-01-01

    The beginning and history of the Central Laboratory of X-ray and Electron Microscopy at the Institute of Physics of the Polish Academy of Sciences in Warsaw is described. Then, recent scientific achievements are presented. Organising activities of the Laboratory staff are also mentioned. (author)

  9. Determining the Transference Number of H[superscript +](aq) by a Modified Moving Boundary Method: A Directed Study for the Undergraduate Physical Chemistry Laboratory

    Science.gov (United States)

    Dabke, Rajeev B.; Gebeyehu, Zewdu; Padelford, Jonathan

    2012-01-01

    A directed study for the undergraduate physical chemistry laboratory for determining the transference number of H[superscript +](aq) using a modified moving boundary method is presented. The laboratory study combines Faraday's laws of electrolysis with mole ratios and the perfect gas equation. The volume of hydrogen gas produced at the cathode is…

  10. Physical interpretation and geometrical representation of constant curvature surfaces in Euclidean and pseudo-Euclidean spaces

    International Nuclear Information System (INIS)

    Catoni, Francesco; Cannata, Roberto; Zampetti, Paolo

    2005-08-01

    The Riemann and Lorentz constant curvature surfaces are investigated from an Euclidean point of view. The four surfaces (constant positive and constant negative curvatures with definite and non-definite fine elements) are represented as surfaces in a Riemannian or in a particular semi-Riemannian flat space and it is shown that the complex and the hyperbolic numbers allow to obtain the same equations for the corresponding Riemann and Lorentz surfaces, respectively. Moreover it is shown that the geodesics on the Lorentz surfaces states, from a physical point of view, a link between curvature and fields. This result is obtained just as a consequence of the space-time geometrical symmetry, without invoking the famous Einstein general relativity postulate [it

  11. Laboratory Tests of Substrate Physical Properties May Not Represent the Retention Capacity of Green Roof Substrates In Situ

    Directory of Open Access Journals (Sweden)

    Christopher Szota

    2017-11-01

    Full Text Available Green roofs can be used to reduce the volume of polluted stormwater that is generated by cities. Modelling rainfall retention is critical, but green roof water balance models often rely on the physical properties of substrates. In these models, substrate water holding capacity (WHC determines the depth of water which can be stored before runoff is generated; whereas, the permanent wilting point (PWP limits evapotranspiration. The WHC and PWP, as well as plant available water (PAW; where PAW = WHC − PWP, as determined from laboratory tests, may not truly reflect how substrates perform on green roofs. We therefore ran a simulated rainfall experiment on green roof modules to (i compare the rainfall retention of vegetated and non-vegetated substrates with different WHC and PAW, and (ii relate retention to substrate storage capacity, as calculated from laboratory measures of WHC and PAW. We found that the PAW of a substrate is a better indicator of evapotranspiration and retention when compared with WHC. However, we also found that substrates always retained less water than their calculated storage capacity would suggest, most likely being due to their high permeability. Our results indicate that using laboratory-derived measures of WHC and PAW in green roof models may be over-estimating both evapotranspiration and rainfall retention.

  12. Observations and Modeling of Long Negative Laboratory Discharges: Identifying the Physics Important to an Electrical Spark in Air

    Energy Technology Data Exchange (ETDEWEB)

    Biagi, C J; Uman, M A

    2011-12-13

    There are relatively few reports in the literature focusing on negative laboratory leaders. Most of the reports focus exclusively on the simpler positive laboratory leader that is more commonly encountered in high voltage engineering [Gorin et al., 1976; Les Renardieres Group, 1977; Gallimberti, 1979; Domens et al., 1994; Bazelyan and Raizer 1998]. The physics of the long, negative leader and its positive counterpart are similar; the two differ primarily in their extension mechanisms [Bazelyan and Raizer, 1998]. Long negative sparks extend primarily by an intermittent process termed a 'step' that requires the development of secondary leader channels separated in space from the primary leader channel. Long positive sparks typically extend continuously, although, under proper conditions, their extension can be temporarily halted and begun again, and this is sometimes viewed as a stepping process. However, it is emphasized that the nature of positive leader stepping is not like that of negative leader stepping. There are several key observational studies of the propagation of long, negative-polarity laboratory sparks in air that have aided in the understanding of the stepping mechanisms exhibited by such sparks [e.g., Gorin et al., 1976; Les Renardieres Group, 1981; Ortega et al., 1994; Reess et al., 1995; Bazelyan and Raizer, 1998; Gallimberti et al., 2002]. These reports are reviewed below in Section 2, with emphasis placed on the stepping mechanism (the space stem, pilot, and space leader). Then, in Section 3, reports pertaining to modeling of long negative leaders are summarized.

  13. Measurement of the magnetic field of small magnets with a smartphone: a very economical laboratory practice for introductory physics courses

    International Nuclear Information System (INIS)

    Arribas, Enrique; Escobar, Isabel; Suarez, Carmen P; Najera, Alberto; Beléndez, Augusto

    2015-01-01

    In this work, we propose an inexpensive laboratory practice for an introductory physics course laboratory for any grade of science and engineering study. This practice was very well received by our students, where a smartphone (iOS, Android, or Windows) is used together with mini magnets (similar to those used on refrigerator doors), a 20 cm long school rule, a paper, and a free application (app) that needs to be downloaded and installed that measures magnetic fields using the smartphone’s magnetic field sensor or magnetometer. The apps we have used are: Magnetometer (iOS), Magnetometer Metal Detector, and Physics Toolbox Magnetometer (Android). Nothing else is needed. Cost of this practice: free. The main purpose of the practice is that students determine the dependence of the component x of the magnetic field produced by different magnets (including ring magnets and sphere magnets). We obtained that the dependency of the magnetic field with the distance is of the form x –3 , in total agreement with the theoretical analysis. The secondary objective is to apply the technique of least squares fit to obtain this exponent and the magnetic moment of the magnets, with the corresponding absolute error. (paper)

  14. Measurement of the magnetic field of small magnets with a smartphone: a very economical laboratory practice for introductory physics courses

    Science.gov (United States)

    Arribas, Enrique; Escobar, Isabel; Suarez, Carmen P.; Najera, Alberto; Beléndez, Augusto

    2015-11-01

    In this work, we propose an inexpensive laboratory practice for an introductory physics course laboratory for any grade of science and engineering study. This practice was very well received by our students, where a smartphone (iOS, Android, or Windows) is used together with mini magnets (similar to those used on refrigerator doors), a 20 cm long school rule, a paper, and a free application (app) that needs to be downloaded and installed that measures magnetic fields using the smartphone’s magnetic field sensor or magnetometer. The apps we have used are: Magnetometer (iOS), Magnetometer Metal Detector, and Physics Toolbox Magnetometer (Android). Nothing else is needed. Cost of this practice: free. The main purpose of the practice is that students determine the dependence of the component x of the magnetic field produced by different magnets (including ring magnets and sphere magnets). We obtained that the dependency of the magnetic field with the distance is of the form x-3, in total agreement with the theoretical analysis. The secondary objective is to apply the technique of least squares fit to obtain this exponent and the magnetic moment of the magnets, with the corresponding absolute error.

  15. A Laboratory Experimental Study: An FBG-PVC Tube Integrated Device for Monitoring the Slip Surface of Landslides.

    Science.gov (United States)

    Wang, Kai; Zhang, Shaojie; Chen, Jiang; Teng, Pengxiao; Wei, Fangqiang; Chen, Qiao

    2017-10-30

    A new detection device was designed by integrating fiber Bragg grating (FBG) and polyvinyl chloride (PVC) tube in order to monitor the slip surface of a landslide. Using this new FBG-based device, a corresponding slope model with a pre-set slip surface was designed, and seven tests with different soil properties were carried out in laboratory conditions. The FBG sensing fibers were fixed on the PVC tube to measure strain distributions of PVC tube at different elevation. Test results indicated that the PVC tube could keep deformation compatible with soil mass. The new device was able to monitor slip surface location before sliding occurrence, and the location of monitored slip surface was about 1-2 cm above the pre-set slip surface, which basically agreed with presupposition results. The monitoring results are expected to be used to pre-estimate landslide volume and provide a beneficial option for evaluating the potential impact of landslides on shipping safety in the Three Gorges area.

  16. Evaluation of Cavity Collapse and Surface Crater Formation for Selected Lawrence Livermore National Laboratory Underground Nuclear Tests - 2010

    Energy Technology Data Exchange (ETDEWEB)

    Pawloski, G A

    2011-01-03

    This report evaluates collapse evolution for selected Lawrence Livermore National Laboratory (LLNL) underground nuclear tests at the Nevada National Security Site (NNSS, formerly called the Nevada Test Site). The work is being done at the request of Navarro-Interra LLC, and supports environmental restoration efforts by the Department of Energy, National Nuclear Security Administration for the Nevada Site Office. Safety decisions must be made before a surface crater area, or potential surface crater area, can be reentered for any work. Our statements on cavity collapse and surface crater formation are input into their safety decisions. These statements do not include the effects of erosion that may modify the surface collapse craters over time. They also do not address possible radiation dangers that may be present. Subject matter experts from the LLNL Containment Program who had been active in weapons testing activities performed these evaluations. Information used included drilling and hole construction, emplacement and stemming, timing and sequence of the selected test and nearby tests, geology, yield, depth of burial, collapse times, surface crater sizes, cavity and crater volume estimations, and ground motion. Both classified and unclassified data were reviewed. Various amounts of information are available for these tests, depending on their age and other associated activities. Lack of data can hamper evaluations and introduce uncertainty. We make no attempt to quantify this uncertainty.

  17. P24 Plasma Physics Summer School 2012 Los Alamos National Laboratory Summer lecture series for students

    Energy Technology Data Exchange (ETDEWEB)

    Intrator, Thomas P. [Los Alamos National Laboratory; Bauer, Bruno [Univ Nevada, Reno; Fernandez, Juan C. [Los Alamos National Laboratory; Daughton, William S. [Los Alamos National Laboratory; Flippo, Kirk A. [Los Alamos National Laboratory; Weber, Thomas [Los Alamos National Laboratory; Awe, Thomas J. [Los Alamos National Laboratory; Kim, Yong Ho [Los Alamos National Laboratory

    2012-09-07

    This report covers the 2012 LANL summer lecture series for students. The lectures were: (1) Tom Intrator, P24 LANL: Kick off, Introduction - What is a plasma; (2) Bruno Bauer, Univ. Nevada-Reno: Derivation of plasma fluid equations; (3) Juan Fernandez, P24 LANL Overview of research being done in p-24; (4) Tom Intrator, P24 LANL: Intro to dynamo, reconnection, shocks; (5) Bill Daughton X-CP6 LANL: Intro to computational particle in cell methods; (6) Kirk Flippo, P24 LANL: High energy density plasmas; (7) Thom Weber, P24 LANL: Energy crisis, fission, fusion, non carbon fuel cycles; (8) Tom Awe, Sandia National Laboratory: Magneto Inertial Fusion; and (9) Yongho Kim, P24 LANL: Industrial technologies.

  18. Sensory and instrumental evaluation of physical characteristics of laboratory -made chocolate

    Directory of Open Access Journals (Sweden)

    Jovanović Olga Lj.

    2002-01-01

    Full Text Available Sensory evaluation of chocolate, as a complex multicompound system, is one of the ways to define and control its physico-chemical characteristics, i.e. quality. Chocolate quality depends on structure and ingredients percentage that influence its appearance, taste and behaviour in the production processes and storage. The aim of this work was to compare certain quality factors of laboratory-made chocolate with added emulsifier-blooming inhibitor, determinated by sensory and instrumental analyses. Sensory evaluation of chocolate samples was made according to ISO 6685:1985 method (total score system. This ISO standard method was supplemented with QDA method for determination of mouth feel. The results of colour sensory evaluation showed good agreement with whiteness obtained on a MOM Colour 100 instrument by Hunter system evaluation. This showed that the sensory analysis, in comparison with instrumental determination of some quality factors, is an objective method.

  19. Surface chemical-modification for engineering the intrinsic physical properties of inorganic two-dimensional nanomaterials.

    Science.gov (United States)

    Guo, Yuqiao; Xu, Kun; Wu, Changzheng; Zhao, Jiyin; Xie, Yi

    2015-02-07

    Two-dimensional (2D) nanomaterials, especially the inorganic ultrathin nanosheets with single or few-atomic layers, have been extensively studied due to their special structures and rich physical properties coming from the quantum confinement of electrons. With atomic-scale thickness, 2D nanomaterials have an extremely high specific surface area enabling their surface phase to be as important as bulk counterparts, and therefore provide an alternative way of modifying the surface phase for engineering the intrinsic physical properties of inorganic 2D nanomaterials. In this review, we focus on recent research concerning surface chemical modification strategies to effectively engineer the intrinsic physical properties of inorganic 2D nanomaterials. We highlight the newly developed regulation strategies of surface incorporation, defect engineering, and structure modulation of inorganic 2D nanomaterials, which respectively influence the intrinsic conductivity, band structure, and magnetism while maintaining the primary 2D freestanding structures that are vital for 2D based ultrasensitive electronic response, enhanced catalytic and magnetocaloric capabilities.

  20. The Dark Matter Time Projection Chamber 4Shooter directional dark matter detector: Calibration in a surface laboratory

    International Nuclear Information System (INIS)

    Battat, James B.R.; Deaconu, Cosmin; Druitt, Gabriela; Eggleston, Richard; Fisher, Peter; Giampa, Pietro; Gregoric, Vincent; Henderson, Shawn; Jaegle, Igal; Lawhorn, Jay; Lopez, Jeremy P.; Monroe, Jocelyn; Recine, Kristen A.; Strandberg, Adam; Tomita, Hidefumi; Vahsen, Sven; Wellenstein, Hermann

    2014-01-01

    The 4Shooter is a prototype dark matter detector built by the Dark Matter Time Projection Chamber (DMTPC) collaboration. The aim of the collaboration is to observe dark matter with directional sensitivity by measuring the recoil directions of nuclei struck by dark matter particles. The 4Shooter is a single time projection chamber containing CF 4 gas, with both optical (CCD and photomultiplier tube) and charge readout. This paper describes the 4Shooter and presents results from the commissioning of the detector in a surface laboratory

  1. Mars' surface radiation environment measured with the Mars science laboratory's curiosity rover

    NARCIS (Netherlands)

    Hassler, D.M.; Zeitlin, C.; Wimmer-Schweingruber, R.F.; Ehresmann, B.; Rafkin, S.; Eigenbrode, J.L.; Brinza, D.E.; Weigle, G.; Böttcher, S.; Böhm, E.; Burmeister, S.; Guo, J.; Köhler, J.; Martin, C.; Reitz, G.; Cucinotta, F.A.; Kim, M.-H.; Grinspoon, D.; Bullock, M.A.; Posner, A.; Gómez-Elvira, J.; Vasavada, A.; Grotzinger, J.P.; MSL Science Team, the|info:eu-repo/dai/nl/292012217

    2014-01-01

    The Radiation Assessment Detector (RAD) on the Mars Science Laboratory’s Curiosity rover began making detailed measurements of the cosmic ray and energetic particle radiation environment on the surface of Mars on 7 August 2012. We report and discuss measurements of the absorbed dose and dose

  2. Critical laboratory and field evaluation of selected surface prospecting techniques for locating oil and natural gas

    Energy Technology Data Exchange (ETDEWEB)

    Heemstra, R.J.; Ray, R.M.; Wesson, T.C.; Abrams, J.R.; Moore, G.A.

    1979-01-01

    The theoretical basis for the radiation HALO method in geochemical exploration for oil and gas is largely unproven but has been covered extensively in the literature. An evaluation of the method was conducted by direct field examination of some of the variables. The variables chosen were surface radiometry, magnetometry, gravity, and near-surface soil sampling. The radiometry included measurements of potassium-40, thallium-208, and bismuth-214. The near-surface soil samples were analyzed for light hydrocarbon gases through C-4, pH, conductivity, surface area, and moisture. Statistical evaluation and comparisons of these variables were made by computer from their data bases. High correlations between variables were confirmed by comparisons of contour maps on transparent overlays. The highest positive correlations were between the five normal gases over the entire eighteen-section map. A distinct relationship was found between conductivity, pH, and the five normal gases. The role of field topography was also found to be significant. No relationship between the hydrocarbon and radiometric anomalies could be found. Radiometric patterns were heavily influenced, however, by the topographic features.

  3. Surface emission from neutron stars and implications for the physics of their interiors

    International Nuclear Information System (INIS)

    Özel, Feryal

    2013-01-01

    Neutron stars are associated with diverse physical phenomena that take place in conditions characterized by ultrahigh densities as well as intense gravitational, magnetic and radiation fields. Understanding the properties and interactions of matter in these regimes remains one of the challenges in compact object astrophysics. Photons emitted from the surfaces of neutron stars provide direct probes of their structure, composition and magnetic fields. In this review, I discuss in detail the physics that governs the properties of emission from the surfaces of neutron stars and their various observational manifestations. I present the constraints on neutron star radii, core and crust composition, and magnetic field strength and topology obtained from studies of their broadband spectra, evolution of thermal luminosity, and the profiles of pulsations that originate on their surfaces. (review article)

  4. Surface emission from neutron stars and implications for the physics of their interiors.

    Science.gov (United States)

    Ozel, Feryal

    2013-01-01

    Neutron stars are associated with diverse physical phenomena that take place in conditions characterized by ultrahigh densities as well as intense gravitational, magnetic and radiation fields. Understanding the properties and interactions of matter in these regimes remains one of the challenges in compact object astrophysics. Photons emitted from the surfaces of neutron stars provide direct probes of their structure, composition and magnetic fields. In this review, I discuss in detail the physics that governs the properties of emission from the surfaces of neutron stars and their various observational manifestations. I present the constraints on neutron star radii, core and crust composition, and magnetic field strength and topology obtained from studies of their broadband spectra, evolution of thermal luminosity, and the profiles of pulsations that originate on their surfaces.

  5. Ion Beam and Plasma Technology Development for Surface Modification at Los Alamos National Laboratory

    Energy Technology Data Exchange (ETDEWEB)

    Davis, H.A.; Munson, C.P.; Wood, B.P.; Bitteker, L.J.; Nastasi, M.A.; Rej, D.J.; Waganaar, W.J.; Walter, K.C. [Los Alamos National Lab., NM (United States); Coates, D.M.; Schleinitz, H.M. [DuPont Central Research and Development, Wilmington, DE (United States)

    1997-12-31

    We are developing two high-throughput technologies for materials modification. The first is a repetitive intense ion beam source for materials modification through rapid surface melt and resolidification (up to 10{sup 10} deg/sec cooling rates) and for ablative deposition of coatings. The short range of the ions (typically 0.1 to 5 micrometers) allows vaporization or melting at moderate beam energy density (typically 1-50 J/cm{sup 2}). A new repetitive intense ion beam accelerator called CHAMP is under development at Los Alamos. The design beam parameters are: E=200 keV, I=15 kA, {tau}=1 {micro}s, and 1 Hz. This accelerator will enable applications such as film deposition, alloying and mixing, cleaning and polishing, corrosion and wear resistance, polymer surface treatments, and nanophase powder synthesis. The second technology is plasma source ion implantation (PSII) using plasmas generated from both gas phase (using radio frequency excitation) and solid phase (using a cathodic arc) sources. We have used PSII to directly implant ions for surface modification or as method for generating graded interfaces to enhance the adhesion of surface coatings. Surfaces with areas of up to 16 m{sup 2} and weighing more than a thousand kilograms have been treated in the Los Alamos PSII chamber. In addition, PSII in combination with cathodic source deposition has been used to form highly adherent, thick Er{sub 2}O{sub 3} coatings on steel for reactive metal containment in casting. These coatings resist delamination under extreme mechanical and thermal stress.

  6. Laboratory Investigation on Physical and Mechanical Properties of Granite After Heating and Water-Cooling Treatment

    Science.gov (United States)

    Zhang, Fan; Zhao, Jianjian; Hu, Dawei; Skoczylas, Frederic; Shao, Jianfu

    2018-03-01

    High-temperature treatment may cause changes in physical and mechanical properties of rocks. Temperature changing rate (heating, cooling and both of them) plays an important role in those changes. Thermal conductivity tests, ultrasonic pulse velocity tests, gas permeability tests and triaxial compression tests are performed on granite samples after a heating and rapid cooling treatment in order to characterize the changes in physical and mechanical properties. Seven levels of temperature (from 25 to 900 °C) are used. It is found that the physical and mechanical properties of granite are significantly deteriorated by the thermal treatment. The porosity shows a significant increase from 1.19% at the initial state to 6.13% for samples heated to 900 °C. The increase in porosity is mainly due to three factors: (1) a large number of microcracks caused by the rapid cooling rate; (2) the mineral transformation of granite through high-temperature heating and water-cooling process; (3) the rapid cooling process causes the mineral particles to weaken. As the temperature of treatment increases, the thermal conductivity and P-wave velocity decrease while the gas permeability increases. Below 200 °C, the elastic modulus and cohesion increase with temperature increasing. Between 200 and 500 °C, the elastic modulus and cohesion have no obvious change with temperature. Beyond 500 °C, as the temperature increases, the elastic modulus and cohesion obviously decrease and the decreasing rate becomes slower with the increase in confining pressure. Poisson's ratio and internal frictional coefficient have no obvious change as the temperature increases. Moreover, there is a transition from a brittle to ductile behavior when the temperature becomes high. At 900 °C, the granite shows an obvious elastic-plastic behavior.

  7. Princeton University Plasma Physics Laboratory, Princeton, New Jersey. Annual report, October 1, 1990--September 30, 1991

    Energy Technology Data Exchange (ETDEWEB)

    1991-12-31

    This report discusses the following topics: Principal parameters of experimental devices; Tokamak Fusion Test Reactor; Burning Plasma Experiment; Princeton Beta Experiment-Modification; Current Drive Experiment-Upgrade; International Thermonuclear Experimental Reactor; International Collaboration; X-Ray Laser Studies; Hyperthermal Atomic Beam Source; Pure Electron Plasma Experiments; Plasma Processing: Deposition and Etching of Thin Films; Theoretical Studies; Tokamak Modeling; Engineering Department; Environment, Safety, and Health and Quality Assurance; Technology Transfer; Office of Human Resources and Administration; PPPL Patent Invention Disclosures; Office of Resource Management; Graduate Education: Plasma Physics; Graduate Education: Program in Plasma Science and Technology; and Science Education Program.

  8. Surface radiological investigation of Trench 5 in Waste Area Grouping 7 at Oak Ridge National Laboratory, Oak Ridge, Tennessee

    International Nuclear Information System (INIS)

    Goff, D.D.

    1991-08-01

    A surface radiological investigation of areas encompassing Trench 5 on the Oak Ridge Reservation (ORR) was conducted from May 1990 through November 1990. This survey was led by the author, assisted by various members of the Measurement Applications and Development (MAD) group of the Health and Safety Research Division (HASRD) of Oak Ridge National Laboratory (ORNL) in Oak Ridge, Tennessee. The purpose of the investigation was to determine the presence, nature, and extent of surface radiological contamination at Trench 5, the Homogeneous Reactor Experiment fuel wells, and surrounding areas. Based on the data obtained in the field, interim corrective measures were recommended to limit human exposure to radioactivity and to minimize insult to the environment. It should be stressed that this project was not intended to be a complete site characterization but rather to be a preliminary investigation into the potential contamination problem that might exist as a result of past operations at Trench 5

  9. Surface radiological investigation of Trench 5 in Waste Area Grouping 7 at Oak Ridge National Laboratory, Oak Ridge, Tennessee

    Energy Technology Data Exchange (ETDEWEB)

    Goff, D.D.

    1991-08-01

    A surface radiological investigation of areas encompassing Trench 5 on the Oak Ridge Reservation (ORR) was conducted from May 1990 through November 1990. This survey was led by the author, assisted by various members of the Measurement Applications and Development (MAD) group of the Health and Safety Research Division (HASRD) of Oak Ridge National Laboratory (ORNL) in Oak Ridge, Tennessee. The purpose of the investigation was to determine the presence, nature, and extent of surface radiological contamination at Trench 5, the Homogeneous Reactor Experiment fuel wells, and surrounding areas. Based on the data obtained in the field, interim corrective measures were recommended to limit human exposure to radioactivity and to minimize insult to the environment. It should be stressed that this project was not intended to be a complete site characterization but rather to be a preliminary investigation into the potential contamination problem that might exist as a result of past operations at Trench 5.

  10. Abstracts and parameter index database for reports pertaining to the unsaturated zone and surface water-ground water interactions at the Idaho National Engineering Laboratory

    International Nuclear Information System (INIS)

    Bloomsburg, G.; Finnie, J.; Horn, D.; King, B.; Liou, J.

    1993-05-01

    This report is a product generated by faculty at the University of Idaho in support of research and development projects on Unsaturated Zone Contamination and Transport Processes, and on Surface Water-Groundwater Interactions and Regional Groundwater Flow at the Idaho National Engineering Laboratory. These projects are managed by the State of Idaho's INEL Oversight Program under a grant from the US Department of Energy. In particular, this report meets project objectives to produce a site-wide summary of hydrological information based on a literature search and review of field, laboratory and modeling studies at INEL, including a cross-referenced index to site-specific physical, chemical, mineralogic, geologic and hydrologic parameters determined from these studies. This report includes abstracts of 149 reports with hydrological information. For reports which focus on hydrological issues, the abstracts are taken directly from those reports; for reports dealing with a variety of issues beside hydrology, the abstracts were generated by the University of Idaho authors concentrating on hydrology-related issues. Each abstract is followed by a ''Data'' section which identifies types of technical information included in a given report, such as information on parameters or chemistry, mineralogy, stream flows, water levels. The ''Data'' section does not include actual values or data

  11. Low-Cost Alternative for Signal Generators in the Physics Laboratory

    Science.gov (United States)

    Pathare, Shirish Rajan; Raghavendra, M. K.; Huli, Saurabhee

    2017-05-01

    Recently devices such as the optical mouse of a computer, webcams, Wii remote, and digital cameras have been used to record and analyze different physical phenomena quantitatively. Devices like tablets and smartphones are also becoming popular. Different scientific applications available at Google Play (Android devices) or the App Store (iOS devices) make them versatile. One can find many websites that provide information regarding various scientific applications compatible with these systems. A variety of smartphones/tablets are available with different types of sensors embedded. Some of them have sensors that are capable of measuring intensity of light, sound, and magnetic field. The camera of these devices has been used to study projectile motion, and the same device, along with a sensor, has been used to study the physical pendulum. Accelerometers have been used to study free and damped harmonic oscillations and to measure acceleration due to gravity. Using accelerometers and gyroscopes, angular velocity and centripetal acceleration have been measured. The coefficient of restitution for a ball bouncing on the floor has been measured using the application Oscilloscope on the iPhone. In this article, we present the use of an Android device as a low-cost alternative for a signal generator. We use the Signal Generator application installed on the Android device along with an amplifier circuit.

  12. In vitro effect of meconium on the physical surface properties and morphology of exogenous pulmonary surfactant.

    Science.gov (United States)

    Park, K. H.; Bae, C. W.; Chung, S. J.

    1996-01-01

    The pathophysiology of meconium aspiration syndrome(MAS) is related to mechanical obstruction of the airways and to chemical pneumonitis. Meconium is also suggested to cause functional deterioration of pulmonary surfactant. Recent studies have reported that meconium inhibits the physical surface properties of pulmonary surfactant, and that administration of exogenous surfactant may provide therapeutic benefits in animal models or infants with respiratory distress due to MAS. To assess the effects of meconium on physical surface properties, especially the changes on the air-liquid interface and hypophase of pulmonary surfactant in vitro, we studied the following findings; a) the surface spreading rate(SSR) and the surface adsorption rate(SAR), b) the viscosity, c) the electron microscopic changes, on a series of mixtures with various concentrations of lyophilized human meconium and Surfactant-TA(SurfactenTM). The human meconium has significantly increased the surface tension of SSR and the viscosity of pulmonary surfactant, but had decreased the surface pressure of SAR of surfactant, and changed the electron microscopic findings of surfactant. We have concluded that these findings support the concept that meconium-induced surfactant dysfunction may play a role in the pathophysiology of MAS. PMID:8934399

  13. Laboratory hyperspectral studies of ice/regolith associations. Application to icy surfaces on Mars.

    Science.gov (United States)

    Yoldi, Z.; Pommerol, A.; Poch, O.; Cerubini, R.; Thomas, N.

    2017-09-01

    Water and carbon dioxide ices are present on Mars under various forms: grains, slab, frosts, inter/intra/areal mixtures, etc. In order to detect and characterize them, their VIS-NIR spectro-photometric are being studied by instruments such as OMEGA, CRISM, HRSC, HiRISE and soon CaSSIS. We provide hyperspectral laboratory data of water and carbon dioxide pure ices as well as mixed with Martian regolith simulant. We analyze the spectral signatures of every sample, studying how we would detect them from orbit. We also simulate the colours of our samples as CaSSIS would see them, to assess the filter combinations that will be more efficient when aiming different targets (i.e, ice or minerals).

  14. Ground and surface water for drinking: a laboratory study on genotoxicity using plant tests

    Directory of Open Access Journals (Sweden)

    Donatella Feretti

    2012-02-01

    Full Text Available Surface waters are increasingly utilized for drinking water because groundwater sources are often polluted. Several monitoring studies have detected the presence of mutagenicity in drinking water, especially from surface sources due to the reaction of natural organic matter with disinfectant. The study aimed to investigate the genotoxic potential of the products of reaction between humic substances, which are naturally present in surface water, and three disinfectants: chlorine dioxide, sodium hypochlorite and peracetic acid. Commercial humic acids dissolved in distilled water at different total organic carbon (TOC concentrations were studied in order to simulate natural conditions of both ground water (TOC=2.5 mg/L and surface water (TOC=7.5 mg/L. These solutions were treated with the biocides at a 1:1 molar ratio of C:disinfectant and tested for genotoxicity using the anaphase chromosomal aberration and micronucleus tests in Allium cepa, and the Vicia faba and Tradescantia micronucleus tests. The tests were carried out after different times and with different modes of exposure, and at 1:1 and 1:10 dilutions of disinfected and undisinfected humic acid solutions. A genotoxic effect was found for sodium hypochlorite in all plant tests, at both TOCs considered, while chlorine dioxide gave positive results only with the A.cepa tests. Some positive effects were also detected for PAA (A.cepa and Tradescantia. No relevant differences were found in samples with different TOC values. The significant increase in all genotoxicity end-points induced by all tested disinfectants indicates that a genotoxic potential is exerted even in the presence of organic substances at similar concentrations to those frequently present in drinking water.

  15. Fabrication and Characterization of the US Army Research Laboratory Surface Enhanced Raman Scattering (SERS) Substrates

    Science.gov (United States)

    2017-12-04

    enhancement. The chemical enhancement occurs when there is a charge transfer resonance between the molecule and the metalized surface. These effects can also...various genes, chemical warfare species, bacteria,60,108–114 diagnostic markers, environmental pollutants , glucose monitoring,102,115 and stress...Inspired Materials 5 1.2 US Army-Relevant Applications of SERS-Hazard Detection 7 1.3 Assessing SERS Substrate: ARL/Edgewood Chemical Biological

  16. Current and future health physics research at Lawrence Livermore National Laboratory

    International Nuclear Information System (INIS)

    Hickman, D.P.

    1993-01-01

    Lawrence Livermore National Laboratory has developed several radiation protection instruments and continues to pursue new approaches in this area. Some of the instruments developed include innovative air-monitoring systems; neutron detection and dosimetry systems; specialized calibration materials and structures, such as the LLNL Realistic Torso Phantom; a fast-response detector system to detect stray beams from x-ray fluorescence devices that can be manufactured for less than $600; and a reliable, light weight personnel air-monitoring system that can be incorporated into a security badge/dosimeter package. A multi-disciplinary team of experts at LLNL is developing and testing cleanable/reusable high-efficiency particulate air-filtration systems and highly sensitive instrumentation for differentiating transuranic waste from nontransuranic waste; developing an advanced detector and circuit design for a hand-held neutron spectrometer; developing techniques for detecting neutron sources using CR-39 and for calibrating in-vivo measurement equipment using Magnetic Resonance Imaging and Monte Carlo simulation; and developing a seamless bottle mannequin adsorption (BOMAB) phantom with recessed fill caps, which have no potential for leakage of liquid sources used for calibrating whole-body counters

  17. Quantification of physical (roughness) and chemical (dielectric constant) leaf surface properties relevant to wettability and adhesion.

    Science.gov (United States)

    Nairn, Justin J; Forster, W Alison; van Leeuwen, Rebecca M

    2011-12-01

    Spray droplet adhesion is dependent not only on formulation and droplet parameters but also on the surface properties (physical and chemical) of the leaf. Quantifying these leaf surface properties would aid understanding and modelling of adhesion, helping to optimise spray formulations. Fractal dimensions (FDs) were used to quantify the relative leaf surface roughness of ten plant species. Static droplet contact angles were measured on each leaf surface, and wetting tension was calculated. Chemical profiles of the leaf surfaces were developed by evaluating contact angle behaviour relative to solution dielectric constants. The FDs of Cryo-SEM micrographs taken at 300× magnification gave the best correlation with adhesion. The wetting tension intercept had a strong relationship with mean adhesion, and successfully accounted for the wettability of the outlier species. The microroughness of the leaf surface, as revealed by Cryo-SEM, can be quantified by fractal dimension analysis. However, the wetting tension intercept is a more useful universal measure of the surface properties of the leaf (including roughness) as they pertain to adhesion. The slope of the wetting tension versus dielectric constant plot allowed preliminary quantification of the chemical contribution of leaf surface dielectric behaviour to adhesion. Copyright © 2011 Society of Chemical Industry.

  18. Demonstration of fundamental statistics by studying timing of electronics signals in a physics-based laboratory

    Science.gov (United States)

    Beach, Shaun E.; Semkow, Thomas M.; Remling, David J.; Bradt, Clayton J.

    2017-07-01

    We have developed accessible methods to demonstrate fundamental statistics in several phenomena, in the context of teaching electronic signal processing in a physics-based college-level curriculum. A relationship between the exponential time-interval distribution and Poisson counting distribution for a Markov process with constant rate is derived in a novel way and demonstrated using nuclear counting. Negative binomial statistics is demonstrated as a model for overdispersion and justified by the effect of electronic noise in nuclear counting. The statistics of digital packets on a computer network are shown to be compatible with the fractal-point stochastic process leading to a power-law as well as generalized inverse Gaussian density distributions of time intervals between packets.

  19. Plasmas: from space to laboratory. 'Introduction to plasma physics' course

    International Nuclear Information System (INIS)

    Savoini, Philippe

    2011-01-01

    This course addresses the different basic concepts of plasma physics. After an introduction which addresses the plasma state, basic equations, the different theoretical approaches (orbitals, kinetic, multi-fluid, magnetohydrodynamics), and the different characteristic scales, waves are addressed and presented as a disordered electromagnetism: existence of plasma waves, generalities on waves, relationship of formal dispersion of plasmas, plasma without magnetic field (longitudinal, transverse, or low frequency wave), plasma with magnetic field (parallel, perpendicular, or arbitrary propagation). The next parts present various approaches: the particle-based approach (case of constant and uniform magnetic fields, case of non-uniform magnetic fields), the statistical approach (elements of kinetic theory, the collision phenomenon, the equilibrium state), and the fluid approach (fluid equations according to the multi-fluid theory, comparison with the particle-based approach, presentation of magnetohydrodynamics as the single-fluid model, validity of MHD)

  20. A universal laboratory method for determining physical parameters of radon migration in dry granulated porous media.

    Science.gov (United States)

    Ye, Yong-Jun; Zhang, Yun-Feng; Dai, Xin-Tao; Ding, De-Xin

    2017-10-01

    The particle size and heaped methods of exhalation media have important effects on physical parameters, such as the free radon production rate, porosity, permeability, and radon diffusion coefficient. However, existing methods for determining those parameters are too complex, and time-consuming. In this study, a novel, systematic determining method was proposed based on nuclide decay, radon diffusion migration theory, and the mass conservation law, and an associated experimental device was designed and manufactured. The parameters of uranium ore heap and sandy soil of radon diffusion coefficient (D), free radon production rate (α), media permeability (k), and porosity (ε) were obtained. At the same time, the practicality of the novel determining method was improved over other methods, with the results showing that accuracy was within the acceptable range of experimental error. This novel method will be of significance for the study of radon migration and exhalation in granulated porous media. Copyright © 2017 Elsevier Ltd. All rights reserved.