WorldWideScience

Sample records for wire-scanner recentering experiment

  1. submitter Dynamical Models of a Wire Scanner

    CERN Document Server

    Barjau, Ana; Dehning, Bernd

    2016-01-01

    The accuracy of the beam profile measurements achievable by the current wire scanners at CERN is limited by the vibrations of their mechanical parts. In particular, the vibrations of the carbon wire represent the major source of wire position uncertainty which limits the beam profile measurement accuracy. In the coming years, due to the Large Hadron Collider (LHC) luminosity upgrade, a wire traveling speed up to 20 $m s^{−1}$ and a position measurement accuracy of the order of 1 μm will be required. A new wire scanner design based on the understanding of the wire vibration origin is therefore needed. We present the models developed to understand the main causes of the wire vibrations observed in an existing wire scanner. The development and tuning of those models are based on measurements and tests performed on that CERN proton synchrotron (PS) scanner. The final model for the (wire + fork) system has six degrees-of-freedom (DOF). The wire equations contain three different excitation terms: inertia...

  2. Fast and High Accuracy Wire Scanner

    CERN Document Server

    Koujili, M; Koopman, J; Ramos, D; Sapinski, M; De Freitas, J; Ait Amira, Y; Djerdir, A

    2009-01-01

    Scanning of a high intensity particle beam imposes challenging requirements on a Wire Scanner system. It is expected to reach a scanning speed of 20 m.s-1 with a position accuracy of the order of 1 μm. In addition a timing accuracy better than 1 millisecond is needed. The adopted solution consists of a fork holding a wire rotating by a maximum of 200°. Fork, rotor and angular position sensor are mounted on the same axis and located in a chamber connected to the beam vacuum. The requirements imply the design of a system with extremely low vibration, vacuum compatibility, radiation and temperature tolerance. The adopted solution consists of a rotary brushless synchronous motor with the permanent magnet rotor installed inside of the vacuum chamber and the stator installed outside. The accurate position sensor will be mounted on the rotary shaft inside of the vacuum chamber, has to resist a bake-out temperature of 200°C and ionizing radiation up to a dozen of kGy/year. A digital feedback controller allows maxi...

  3. First Experimental Results And Improvements On Profile Measurements With The Vibrating Wire Scanner

    CERN Document Server

    Arutunian, S G; Dobrovolski, N M; Mailian, M R; Soghoyan, H E; Vasiniuk, I E

    2003-01-01

    The paper presents the first experimental results of transverse profile scans using a wire scanner based on a vibrating wire (vibrating wire scanner - VWS). The measurements were performed at the injector electron beam (6 nA) of the Yerevan synchrotron. The beam profile information is obtained by measuring the wire natural oscillations that depend on the wire temperature. This first experiments on weak electron beam proved this new method as a very sensitive tool, even suitable for tail measurements. Additional, improvements were tested to overcome some problems connected with signal conditioning and signal transfer in the presence of electromagnetic noise. As a result the noises were neatly separated and reduced. A mathematical method for rejection of distorted data was developed. Experiments with the scanner at the PETRA accelerator at DESY are planned for measurements of beam tails.

  4. Wire scanner data analysis for the SSC Linac emittance measurement

    International Nuclear Information System (INIS)

    Yao, C.Y.; Hurd, J.W.; Sage, J.

    1993-07-01

    The wire scanners are designed in the SSC Linac for measurement of beam emittance at various locations. In order to obtain beam parameters from the scan signal, a data analysis program was developed that considers the problems of noise reduction, machine modeling, parameter fitting, and correction. This program is intended as a tool for Linac commissioning and also as part of the Linac control program. Some of the results from commissioning runs are presented

  5. Mechanical optimisation of a high-precision fast wire scanner at CERN

    CERN Document Server

    Samuelsson, Sebastian; Veness, Raymond

    Wire scanners are instruments used to measure the transverse beam prole in particle accelerators by passing a thin wire through the particle beam. To avoid the issues of vacuum leakage through the bellows and wire failure related to current designs of wire scanners, a new concept for a wire scanner has been developed at CERN. This design has all moving parts inside the beam vacuum and has a nominal wire scanning speed of 20 m/s. The demands on the design associated with this together with the high precision requirements create a need for\

  6. Vacuum Actuator and Controller Design for a Fast Wire Scanner

    CERN Document Server

    Dehning, B; Herranz Alvarez, J; Koujili, M; Sirvent Blasco, J L

    2012-01-01

    To cope with increasing requirements in terms of accuracy and beam intensity limits a beam wire scanner (BWS) design is under development for the CERN accelerators complex. The main parameters have been determined; the wire speed should be 20 m·s -1 when interacting with the beam and a beam width determination accuracy of 2µm under the harsh radioactive environment should be reached. To meet this goal, the proposed solution locates all moveable parts of the actuator and the angular sensors in the beam vacuum pipe in order to reduce the friction and to allow a direct position measurement. One absolute positioning sensor will be used for the brushless motor feedback and one custom, high precision incremental design will target the beam size determination. The laboratory tests set up for the actuator and the incremental sensor will be presented along with the motor control feedback loops developed with the DSpace environment using Simulink and MatLab tools. Finally, the development of the digital...

  7. The mechatronic design of a fast wire scanner in IHEP U-70 accelerator

    International Nuclear Information System (INIS)

    Baranov, V.T.; Makhov, S.S.; Savin, D.A.; Terekhov, V.I.

    2016-01-01

    This paper presents the mechatronic design of a fast wire scanner based on a servomotor. The design of the wire scanner is motivated by the need to measure the transverse profile of the high power proton and carbon beams at the IHEP U-70 accelerator. This paper formulates the requirements to the fast wire scanner system for the high intensity proton beam at the U-70 accelerator. The results on the design of electro-mechanical device for the wire scanner with a wire traveling speed 10–20 m/s are presented. The solution consists in a brushless servomotor and standard motor control electronics. High radiation levels in the accelerator enclosure dictate the use of a resolver as the position feedback element.

  8. The mechatronic design of a fast wire scanner in IHEP U-70 accelerator

    Energy Technology Data Exchange (ETDEWEB)

    Baranov, V.T. [Institute for High Energy Physics in National Research Centre “Kurchatov Institute”, Protvino 142281 (Russian Federation); Makhov, S.S. [Microprivod Ltd., Moscow 111123 (Russian Federation); Savin, D.A.; Terekhov, V.I. [Institute for High Energy Physics in National Research Centre “Kurchatov Institute”, Protvino 142281 (Russian Federation)

    2016-10-11

    This paper presents the mechatronic design of a fast wire scanner based on a servomotor. The design of the wire scanner is motivated by the need to measure the transverse profile of the high power proton and carbon beams at the IHEP U-70 accelerator. This paper formulates the requirements to the fast wire scanner system for the high intensity proton beam at the U-70 accelerator. The results on the design of electro-mechanical device for the wire scanner with a wire traveling speed 10–20 m/s are presented. The solution consists in a brushless servomotor and standard motor control electronics. High radiation levels in the accelerator enclosure dictate the use of a resolver as the position feedback element.

  9. Minimisation of the wire position uncertainties of the new CERN vacuum wire scanner

    CERN Document Server

    AUTHOR|(CDS)2069346; Barjau Condomines, A

    In the next years the luminosity of the LHC will be significantly increased. This will require a much higher accuracy of beam profile measurement than actually achievable by the current wire scanner. The new fast wire scanner is foreseen to measure small emittance beams throughout the LHC injector chain, which demands a wire travelling speed up to 20 ms-1 and position measurement accuracy of the order of a few microns. The vibrations of the mechanical parts of the system, and particularly the vibrations of the thin carbon wire, were identified as the major error sources of wire position uncertainty. Therefore the understanding of the wire vibrations is a high priority for the design and operation of the new device. This document presents the work performed to understand the main causes of the wire vibrations observed in one of the existing wire scanner and the new proposed design.

  10. A high resolution wire scanner beam profile monitor with a microprocessor data acquisition system

    International Nuclear Information System (INIS)

    Cutler, R.I.; Mohr, D.L.; Whittaker, J.K.; Yoder, N.R.

    1983-01-01

    A beam profile monitor has been constructed for the NBS-LANL Racetrack Microtron. The monitor consists of two perpendicular 30 μm diameter carbon wires that are driven through an electron beam by a pneumatic actuator. A long-lifetime, electroformed nickel bellows is used for the linear-motion vacuum feedthrough. Secondary emission current from the wires and a signal from a transducer measuring the position of the wires are simultaneously digitized by a microprocessor to yield beam current density profiles in two dimensions. The wire scanner is designed for use with both pulsed and cw beams

  11. Design of a high-precision fast wire scanner for the SPS at CERN

    CERN Document Server

    Veness, R; Dehning, B; Emery, J; Herranz Alvarez, J; Koujili, M; Samuelsson, S; Sirvent, J-L

    2012-01-01

    Studies are going on of a new wire scanner concept. All moving parts are inside the beam vacuum and it is specified for use in all the machines across the CERN accelerator complex. Key components have been developed and tested. Work is now focussing on the installation of a prototype for test in the Super Proton Synchrotron (SPS) accelerator. This article presents the specification of the device and constraints on the design for integration in the different accelerators at CERN. The design issues of the mechanical components are discussed and optimisation work shown. Finally, the prototype design, integrating the several components into the vacuum tank is presented.

  12. Software Development for a CompactRIO-Based Wire Scanner Control and Data Acquisition System

    International Nuclear Information System (INIS)

    Sedillo, James Daniel

    2012-01-01

    The Beam Diagnostics and Instrumentation Team at the Los Alamos Neutron Science Center is developing a wire scanner data acquisition and control system with a National Instrument's compactRIO at its core. For this application, the compactRIO controller not only requires programming the FPGA and RT computer internal to the compactRIO, but also requires programming a client computer and a touch panel display. This article will summarize the hardware interfaces and describe the software design approach utilized for programming and interfacing the four systems together in order to fulfill the design requirements and promote reliable interoperability.

  13. A fast wire scanner, used to measure the transverse density distribution of beams circulating in an accelerator or storage ring.

    CERN Multimedia

    Maximilien Brice

    2002-01-01

    Fast wire scanners are used to measure the transverse density distribution of beams circulating in an accelerator or storage ring. In order to minimize blow-up of the beam through multiple Coulomb scattering, the wires are very thin (in the version shown here it is actually a twisted strand of carbon fibres with a total diameter of about 25 microns) and are swept through the beam at high speed (a linear motor, not mounted here, accelerates the wires to up to 20 m/s). One measures either the secondary emission current from the wire, or the signal from a scintillator/photomultiplier combination downstream from the wire scanner receiving the shower from nuclear reactions of beam particles with the wire nuclei. There are four such fast wire scanners in the 26 GeV PS and eight in the 1.4 GeV Booster.

  14. Performance assesment of pre-series beam wire scanner prototypes for the LHC injectors upgrade

    CERN Document Server

    AUTHOR|(CDS)2243534

    The BEAM department (BE), is in charge of the development and operation of the accelerator components. Inside this department, the Beam Instrumentation group (BE-BI) works on the instruments that allows the operators and scientists to observe the accelerated beam and its characteristics. Finally, the Profile Measurement section (BE-BI-PM) deals with all the instruments capable of measuring the particles transverse distribution (often called transverse beam profile). Among the different systems developed and maintained by the section, the Beam Wire Scanners (BWS) are particularly relevant, because ensures the accurate beam profile measurements in all the circular accelerators and serves as calibration for other instruments. A total of 31 BWS are installed in the PS, PSB, SPS and LHC (see Fig. 1 to recognize the different accelerators). All of these instruments present a different design, depending on their location, and are not satisfying the HL-LHC needs. In order to harmonize the CERN’s BWS with a single d...

  15. Design and construction of a new actuator for the LHC wire scanner

    CERN Document Server

    Koujili, Mohamed

    The LHC collides two protons beams with an energy of 7 TeV each resultingin a aimed total particle rate of about 109 Hz. The particle rateis determined by the production cross section, a natural constant and theluminosity accelerator dependent parameter describing the particle beams.The luminosity depends on the number of particles in each beam linearlyand on the transverse dimensions of the particle beam inversely. It increaseswith the particle beam density and therefore the probability of interactions.To optimize the transverse beams sizes, pro_le monitors are used to measureparameter depending changes. Within the LHC, three di_erent typesof pro_le monitors are installed: Wire scanner (WS), Synchrotron lightmonitor and Rest Gas Pro_le Monitor. The WS monitor is considered tobe the most accurate of these monitors and serves as a calibration devicefor the two others. The WS is an electro-mechanical device which measuresthe transverse beam density pro_le in an intermittent way. As the wirepasses through the be...

  16. Feasibility studies on the direct wire readout on wire scanners in electron accelerators; Durchfuehrbarkeitsstudien zur direkten Drahtauslese an Wirescannern in Elektronen-Beschleunigern

    Energy Technology Data Exchange (ETDEWEB)

    Markert, Michael

    2010-10-15

    This bachelor thesis deals essentially with the signal processing of a so-called wire scanner, a special monitor, which comes to application in the beam diagnostics of particle accelerators. In this direct wire readout the voltage signal, which is induced by the particle beam in the measurement wire of the wire scanner, shall be directly read out. The aim of this thesis is to show fundamental considerations and perform studies, which study, whether and how in the future by means of a suited data transmission as well as readout electronics conclusion on the most important parameters of the beam, like position and profile, are possible. The measurement system presented here is divided in three main components: Signal measurement, signal preparation, and signal stretching. A suited test facility was developed and is presented in detail, in which then all components, like for instance the transmission cables, the wire-scanner fork, and the developed measurement circuit, are studied, which are of importance for a faultless signal transmission and presentation. Extensive measurements on the single components, as well as calculations for the signal transmission on and in the wire scanner were performed, whereby a good agreement could be found. Thereafter a comparison and a selection of the component used in this project were made. Furthermore improvement proposals, new constructions, and outlooks are presented, which could be of importance in further works.

  17. A real-time FPGA based monitoring and fault detection processing system for the Beam Wire Scanner instruments at CERN

    CERN Document Server

    AUTHOR|(CDS)2070252; Tognolini, Maurizio; Zamantzas, Christos

    The CERN Beam Instrumentation group (BE-BI) is designing a new generation of an instrument called Beam Wire Scanner (BWS). This system uses an actuator to move a very thin wire through a particle beams, back and forth with a movement stroke of pi [rad]. To achieve very fast speed when touching the particle beam with such a small stroke, large torque is applied while the expected smoothness of the displacement is crucial. This system relies on a resolver to determine the angular position and power correctly its Permanent Magnet Synchronous Motor (PMSM). In 2016, a failure of the position acquisition chain has highlighted the severe consequences of such problem, which resulted by 24 hours downtime of the Super Proton Synchrotron (SPS) accelerator with significant financial consequences. This work mitigates this single failure point by taking advantage of the existing redundancy in the sensors embedded on the system. The resolver is compared to two Incremental Optical Position Sensor (IOPS) developed in-house ...

  18. Design of an optical fibre based angular position sensor for wire scanners complying with ultra-high vacuum, high temperature and radiation conditions of the CERN´s accelerators

    CERN Document Server

    Sirvent Blasco, Jose Luis; Azorin Poveda, Jose Maria

    The main objective of this thesis is to design and implement the relative optical position sensor based on optical fibre, related to the new design of wire scanner, also taking into account the general specifications of the whole design of the Vacuum Wire Scanner (VWS from here in advanced). According to the limitations of the environment this sensor must work under very hard conditions and provide as much accuracy as possible, this means that all the components must be carefully selected and also rated to high temperature, ultra high vacuum and radiation environment to provide the longest life time as possible.

  19. Results of recent LOFT experiments

    International Nuclear Information System (INIS)

    Leach, L.P.; Hanson, D.J.; Batt, D.L.

    1982-01-01

    Five experiments were performed in the Loss-of-Fluid Test (LOFT) facility during the past year. The experiments conducted spanned a wide range of potential accident scenarios, including large and small break loss-of-coolant accidents (LOCAs), control rod withdrawal accidents, uncontrolled boron dilution, and anticipated transients without scram (ATWS). This summary describes these experiments and presents results available from the experiments and experiment prediction calculations. A brief overview is given for the remaining experiment planned in the LOFT Program

  20. Recent advance in LHD experiment

    Energy Technology Data Exchange (ETDEWEB)

    Motojima, O.; Ohyabu, N.; Komori, A. [and others

    2002-10-01

    In the first four years of LHD experiment, several encouraging results have emerged, the most significant of which is that MHD stability and good transport are compatible in the inward shifted axis configuration. The observed energy confinement at this optimal configuration is consistent with ISS95 scaling with an enhancement factor of 1.5. The confinement enhancement over the smaller heliotron devices is attributed to the high edge temperature. We find that plasma with an average beta of 3% is stable in this configuration even though the theoretical stability conditions of Mercier modes and pressure driven low n modes are violated. In the low density discharges heated by NBI and ECR heatings, ITB (internal transport barrier) and an associated high central temperature (> 10 keV) are seen. The radial electric field measured in these discharges is positive (electron root) and expected to play a key role in the formation of the ITB. The positive electric field is also found to suppress the ion thermal diffusivity as predicted by neoclassical transport theory. The width of the externally imposed island (n/m=1/1) is found to decrease when the plasma is collisionless with finite beta and it increases when the plasma is collisional. The ICRF heating in LHD is successful and a high energy tail (up to 500 keV) has been detected for minority ion heating, demonstrating good confinement of the high energy particles. The magnetic field line structure unique to the heliotron edge configuration is confirmed by measuring the plasma density and temperature profiles on the divertor plate. A long pulse (2 minute) discharge with an ICRF power of 0.4 MW has been demonstrated and energy confinement characteristics are almost the same as those in short pulse discharges. (author)

  1. Recent status of the Tibet ASγ experiment

    International Nuclear Information System (INIS)

    Amenomori, M.; Cao, Z.; Ding, L.K.; Feng, Z.Y.; Hibino, K.; Hotta, N.; Huang, Q.; Huo, A.X.; Jia, H.Y.; Jiang, G.Z.; Jiao, S.Q.; Kajino, F.; Kasahara, K.; Labaciren; Mei, D.M.; Meng, L.; Meng, X.R.; Mimaciren; Mizutani, K.; Mu, J.; Nanjo, H.; Nishizawa, M.; Nusang; Oguro, A.; Ohnishi, M.; Ohta, I.; Ren, J.R.; Saito, T.; Sakata, M.; Shi, Z.Z.

    1993-01-01

    The recent status of Tibet air shower experiment, the shadowing measurement of the Moon and the sun and the results of the searching for the steady emission of 10 TeV gamma rays from Crab Nebula, Cyg X-3 and Her X-1 are reported

  2. Recent U.S. reactor operating experience

    International Nuclear Information System (INIS)

    Stello, V. Jr.

    1977-01-01

    A qualitative assessment of U.S. and foreign reactor operating experience is provided. Recent operating occurrences having potentially significant safety impacts on power operation are described. An evaluation of the seriousness of each of these issues and the plans for resolution is discussed. A quantitative report on U.S. reactor operational experience is included. The details of the NRC program for evaluating and applying operating reactor experience in the regulatory process is discussed. A review is made of the adequacy of operating reactor safety and environmental margins based on actual operating experience. The Regulatory response philosophy to operating reactor experiences is detailed. This discussion indicates the NRC emphasis on the importance of a balanced action plan to provide for the protection of public safety in the national interest

  3. Recent results from the WA98 experiment

    International Nuclear Information System (INIS)

    Peitzmann, T.; Aggarwal, M.M.; Agnihotri, A.; Ahammed, Z.; Angelis, A.L.S.; Antonenko, V.; Arefiev, V.; Astakhov, V.; Avdeitchikov, V.; Awes, T.C.; Baba, P.V.K.S.; Badyal, S.K.; Baldine, A.; Barabach, L.; Barlag, C.; Bathe, S.; Batiounia, B.; Bernier, T.; Bhalla, K.B.; Bhatia, V.S.; Blume, C.; Bohne, E.-M.; Bucher, D.; Buijs, A.; Buesching, H.; Carlen, L.; Chalyshev, V.; Chattopadhyay, S.; Cherbatchev, R.; Chujo, T.; Claussen, A.; Das, A.C.; Decowski, M.P.; Delagrange, H.; Djordjadze, V.; Donni, P.; Doubovik, I.; Dutt, S.; Dutta Majumdar, M.R.; El Chenawi, K.; Eliseev, S.; Enosawa, K.; Foka, P.; Fokin, S.; Frolov, V.; Ganti, M.S.; Garpman, S.; Gavrishchuk, O.; Geurts, F.J.M.; Ghosh, T.K.; Glasow, R.; Gupta, S.K.; Guskov, B.; Gustafsson, H.A.; Gutbrod, H.H.; Higuchi, R.; Hrivnacova, I.; Ippolitov, M.; Kalechofsky, H.; Kamermans, R.; Kampert, K.-H.; Karadjev, K.; Karpio, K.; Kato, S.; Kim, H.; Kolb, B.W.; Kosarev, I.; Koutcheryaev, I.; Kugler, A.; Kulinich, P.; Kurata, M.; Kurita, K.; Kuzmin, N.; Langbein, I.; Lebedev, A.; Lee, Y.Y.; Loehner, H.; Luquin, L.; Mahapatra, D.P.; Manko, V.; Martin, M.; Martinez, G.; Maximov, A.; Mehdiyev, R.; Mgebrichvili, G.; Miake, Y.; Mikhalev, D.; Mir, Md.F.; Mishra, G.C.; Miyamoto, Y.; Mohanty, B.; Morrison, D.; Mukhopadhyay, D.S.; Myalkovski, V.; Naef, H.; Nandi, B.K.; Nayak, S.K.; Nayak, T.K.; Neumaier, S.; Nianine, A.; Nikitine, V.; Nikolaev, S.; Nilsson, P.; Nishimura, S.; Nomokonov, P.; Nystrand, J.; Obenshain, F.E.; Oskarsson, A.; Otterlund, I.; Pachr, M.; Parfenov, A.; Pavliouk, S.; Petracek, V.; Plasil, F.; Pinganaud, W.; Purschke, M.L.; Raeven, B.; Rak, J.; Raniwala, R.; Raniwala, S.; Ramamurthy, V.S.; Rao, N.K.; Retiere, F.; Reygers, K.; Roland, G.; Rosselet, L.; Roufanov, I.; Roy, C.; Rubio, J.M.; Sako, H.; Sambyal, S.S.; Santo, R.; Sato, S.; Schlagheck, H.; Schmidt, H.-R.; Schutz, Y.; Shabratova, G.; Shah, T.H.; Sibiriak, I.; Siemiarczuk, T.; Silvermyr, D.; Sinha, B.C.; Slavine, N.; Soederstroem, K.; Solomey, N.; Soerensen, S.P.; Stankus, P.; Stefanek, G.; Steinberg, P.; Stenlund, E.; Sumbera, M.; Svensson, T.; Trivedi, M.D.; Tsvetkov, A.; Tykarski, L.; Urbahn, J.; Pijll, E.C.V.D.; Eijndhoven, N.V.; Nieuwenhuizen, G.J.V.; Vinogradov, A.; Viyogi, Y.P.; Vodopianov, A.; Voeroes, S.; Wyslouch, B.; Yagi, K.; Yokota, Y.; Young, G.R.

    1999-01-01

    Recent results of the WA98 experiment with Pb induced reactions at 158. A GeV are presented. The scaling properties of the transverse energy and the charged particle multiplicity at midrapidity with the number of participants is studied. Neutral pion spectra are compared to hydrodynamical parameterizations. The analysis of collective flow at target rapidity and at midrapidity is presented. The status of the study of direct photons and the search for isospin fluctuations is discussed

  4. Recent results from the GRAPES-3 experiment

    Directory of Open Access Journals (Sweden)

    Gupta S.K.

    2013-06-01

    Full Text Available The GRAPES-3 is a dense extensive air shower array operating with ~400 scintillator detectors and a 560 m2 large tracking muon detector (Eμ > 1 GeV, at Ooty in India. The muon detector has been used to observe acceleration of muons during thunderstorm conditions. The muon multiplicity distribution of the EAS is used to probe the composition of primary cosmic rays below 1 PeV, with an overlap with direct measurements. More recently we have explored the possibility of using the angular distribution of >1 GeV muons to identify the best from among several low- and high-energy hadronic interaction models. We have major expansion plans to enhance the sensitivity of the GRAPES-3 experiment in all of the areas listed above.

  5. Recent experience reactor pressure vessel manufacture

    International Nuclear Information System (INIS)

    Vignes, A.

    1985-01-01

    This paper present the Framatome's recent experience in the manufacture of 1300 MWe PWR vessels; one shows how the very high standards of quality have been obtained to meet the stringent requirements. After a description of a pressure vessel, materials and forgings properties are presented. The nature and sequence of the main fabrication operations are reviewed. This paper deals after with the quality of welds, the preheating and post-heating equipment, the submerged arc welding process and procedures, the cladding process, and the under-clad cracking problems. Ultrasonic inspection procedures of the main welds are described with a comparison of RCCM (design and construction rules for mechanical components of PWR units) and Sizewell B specifications. Support of data on the reproductibility and effectiveness of ultrasonic examination and on the reliability given by repetitive inspection are presented

  6. Recent results of Daya Bay Experiment

    Science.gov (United States)

    Xia, Dongmei

    2017-12-01

    The Daya Bay reactor neutrino experiment aimed to precisely measure the least known mixing angle θ13. In March 2012, Daya Bay announced the non-zero value with more than 5σ. With more statistics, less background and better control of systematics, the Daya Bay experiment is continuously improving the precision of sin2 2θ13 as well as the effective neutrino mass squared differences. In this paper, I will report the recent oscillation results, which are the most precise measurement of the oscillation parameter θ13 and . With 1230 days of data, sin2 2θ13 is measured to be [8.41 ± 0:27(stat.) ± 0.19(syst.)]×10-2, and = [2.50±0.06(stat.)±0.06(syst.)]×10-3eV2 with X2/NDF = 232.6/263. An independent measurement with the inverse beta decay neutron captured on hydrogen will also be presented.

  7. [Recent experience with mites in stored products].

    Science.gov (United States)

    Liguori, G; Ceccarelli, M T; Mellino, M; Marinelli, P

    1989-01-01

    The A.A. refer a recent experience about the isolation and identification of same species of storaged timber mites. They believe that these mites are responsible of dermatitis at the trunk and the arms of timber workers. Mites are the most elderly living species on the earth, they can live and grow in different environments, such as plants, flowers, animals, men, earth, lake and sea waters, organical rubles, houses, mattresses, old books etc. There are free-living, saprophitic, parasitic and predator mites. Generally, primary mites live either freely or as commensals feeding on conserved foodstuff and on what they find available. Secondary mites, i.e. parasites and predators, live off primary mites and insects infesting foodstuff. Direct damage to foodstuff are not to be considered important, whereas indirect damages are more serious, due to the contamination of bodies and stools of mites that are rich in nitrogen. Some secondary mites may attack foodstuff workers causing characteristic dermatitis: they can act either directly, by sting and bites, or indirectly, provoking on allergic hypersensitivity. In this study the A.A. used the floating method to isolate timber mites, and then, these have been photographed at the microscope to obtain an easier and more complete identification. The A.A. describe a heterogeneous fauna consisting of both adult and larval-status insects, some species of free-living mites (Oribatula Tibialis) and, in particular, of two species secondary mites, predator, belonging to the Prostigmata sub-order. The Cheyletus Eruditus (Cheylatidae family) is a whitish mite feeding mostly on insect larva and primary mites living in foodstuff. When no prey is available, the Cheyletus Eruditus eats individuals of its own species. The Pyemotes Herfsi (Pyemotidae family) is a little white mite feeding on insect larva. It lives in conserved foodstuff and may attack man causing characteristic dermatitis such as those described by the A.A. The A.A. conclude

  8. Recent results from the OPERA experiment

    International Nuclear Information System (INIS)

    Scotto Lavina, L.

    2009-01-01

    OPERA is a long baseline neutrino oscillation experiment designed to observe ν μ →ν τ oscillations by looking at the appearance of ν τ in an almost pure ν μ beam. The beam is produced at CERN and sent towards the Gran Sasso INFN Laboratories where the experiment is running. OPERA started its second year of data taking in June 2008. This paper reviews the status of the experiment.

  9. Recent Multiboson measurements with the ATLAS experiment

    CERN Multimedia

    CERN. Geneva

    2016-01-01

    Measurements of the cross sections of the production of two electroweak gauge bosons constitute stringent tests of the electroweak sector of the Standard Model and provide a model-independent means to search for new physics at the TeV scale. We present recent ATLAS measurements of inclusive and differential cross sections for WW, WZ, ZZ and Z + photon at centre of mass energies of 8 TeV and 13 TeV. Large next-to-next-to-leading order QCD corrections were recently calculated and are confronted with the measurements. We also present recent ATLAS measurements of inclusive cross sections for electroweak production of WZ + 2 jets and production of Z + di-photon at 8 TeV. Differential distributions sensitive to anomalous triple and quartic gauge couplings have been studied and limits on new physics have been derived.

  10. Recent tendency to neutron beam experiments

    International Nuclear Information System (INIS)

    Hamaguchi, Yoshikazu

    1979-01-01

    The application of neutron beam experiment to the study of reactor materials is described in this paper. In Japan, neutron beam experiments have been developed, using reactors JRR-2, JRR-3 and KUR-1. Most of experimental apparatuses in Japan are neutron diffraction systems and three-axis neutron spectrometers, similarly to those in U.S.A. and Canada. In Europe, cold neutron experiments have been developed. The most interesting experiment at present is the small angle scattering experiment. This technique can be applied to the other field than solid state physics. Nondestructive measurements for large samples can be made. Measurement while controlling outside conditions, and measurement for radioactive substances of considerable intensity are possible. Statistical mean values for larger volumes can be obtained as compared with electron microscope observation. Effects of multiple scattering are negligible. A non-destructive test of the properties of turbine blades was made at the GALILEO research reactor. The results were useful for the estimation of the residual life of the blades. Anomaly in the welded parts of pressure vessels for reactors can be detected by the small angle scattering method. The voids in irradiated samples were also observed by this technique. (Kato, T.)

  11. Recent commissioning experience on the SLC arcs

    International Nuclear Information System (INIS)

    Toge, N.; Bambade, P.; Barklow, T.; Brown, K.L.; Bulos, F.; Burke, D.L.; Fieguth, T.; Haiessinski, J.; Hutton, A.; Jung, C.; Kheifets, S.A.; Komamiya, S.; Mattison, T.; Murray, J.J.; Phinney, N.; Placidi, M.; Ritson, D.M.; Sands, M.; Sheppard, J.C.; Weinstein, A.

    1989-01-01

    The Arc transport line, which brings high-energy, high-intensity electron and positron bunches from the SLAC linac to the Stanford Linear Collider final focus section, has been in operation for the past few years. In this paper, the authors will review the techniques developed for the optical tune-up and diagnostics, recent performance, and on-going improvement programs. 13 refs., 4 figs., 1 tab

  12. Recent operational experiments at the LANSCE facility

    Energy Technology Data Exchange (ETDEWEB)

    Rybarcyk, Lawrence J [Los Alamos National Laboratory

    2010-09-15

    The Los Alamos Neutron Science Center (LANSCE) consists of a pulsed 800-MeV room-temperature linear accelerator and an 800-MeV accumulator ring. It simultaneously provides H{sup +} and H{sup -} beams to several user facilities that have their own distinctive requirements, e.g. intensity, chopping pattern, duty factor, etc.. This multibeam operation presents challenges both from the standpoint of meeting the individual requirements but also achieving good overall performance for the integrated operation. Various aspects of more recent operations including the some of these challenges will be discussed.

  13. Recent experiments on acoustic leak detection

    International Nuclear Information System (INIS)

    Voss, J.; Arnaoutis, N.

    1984-01-01

    In the ASB-sodium loop a series of injection experiments with water, helium, argon and nitrogen was performed. The aim of these tests was to get: a comparison of the acoustic signals, generated by water and gas injections with regard to intensity and frequency content; an experimental basis for the design of an acoustic calibration source. The experimental set-up, the variation parameters and first results will be discussed. The principal design of an acoustic calibration source and its range of application will be given. (author)

  14. Recent results from the ARIANNA neutrino experiment

    Directory of Open Access Journals (Sweden)

    Nelles Anna

    2017-01-01

    Full Text Available The ARIANNA experiment is currently taking data in its pilot-phase on the Ross ice-shelf. Fully autonomous stations measure radio signals in the frequency range from 100 MHz to 1 GHz. The seven station hexagonal radio-array (HRA was completed in December 2014, and augmented by two special purpose stations with unique configurations. In its full extent ARIANNA is targeted at detecting interactions of cosmogenic neutrinos (> 1016eV in the ice-shelf. Downward-pointing antennas installed at the surface will record the radio emission created by neutrino-induced showers in the ice and exploit the fact that the ice-water surface acts as a mirror for radio emission. ARIANNA stations are independent, low-powered, easy to install and equipped with real-time communication via satellite modems. We report on the current status of the HRA, as well as air shower detections that have been made over the past year. Furthermore, we will discuss the search for neutrino emission, future plans of the experiment.

  15. Recent results of the CPLEAR experiment

    CERN Document Server

    Adler, R; Angelopoulos, Angelos; Aspostolakis, A; Aslanides, Elie; Backenstoss, Gerhard; Bee, C P; Behnke, O; Bennet, J; Bertin, V; Blanc, F; Bloch, P; Bula, C; Carlson, P J; Carroll, M; Carvalho, J; Cawley, E; Charalambous, S; Chardalas, M; Chardin, G; Chertok, M B; Cody, A; Danielsson, M; Dedoussis, S; Dejardin, M; Derré, J; Dodgson, M; Duclos, J; Ealet, A; Eckart, B; Eleftheriadis, C; Evangelou, I; Faravel, L; Fassnacht, P; Faure, J L; Felder, C; Ferreira-Marques, R; Fetscher, W; Fidecaro, Maria; Filipcic, A; Francis, D; Fry, J; Gabathuler, Erwin; Gamet, R; Garreta, D; Geralis, T; Gerber, H J; Gumplinger, P; Go, A; Guyot, C; Haselden, A; Hayman, P J; Henry-Coüannier, F; Hollander, R W; Hubert, E; Jansson, K; Johner, H U; Jon-And, K; Kettle, P R; Kochowski, Claude; Kokkas, P; Kreuger, R; Lawry, T; Le Gac, R; Leimgruber, F; Liolios, A; Machado, E; Maley, P; Mandic, I; Manthos, N; Marel, Gérard; Mikuz, M; Miller, J; Montanet, François; Nakada, Tatsuya; Onofre, A; Pagels, B; Pavlopoulos, P; Pelucchi, F; Pinto da Cunha, J; Policarpo, Armando; Polivka, G; Postma, H; Rickenbach, R; Roberts, B L; Rozaki, E; Ruf, T; Sacks, L; Sakelliou, L; Sanders, P; Santoni, C; Sarigiannis, K; Schäfer, M; Schaller, L A; Schopper, A; Schune, P; Soares, A; Tauscher, Ludwig; Thibault, C; Touchard, F; Touramanis, C; Triantis, F A; Tröster, D A; Van Beveren, E; van Eijk, C W E; Vlachos, S; Weber, P; Wigger, O; Witzig, C; Wolter, M; Yéche, C; Zavrtanik, D; Zimmerman, D

    1995-01-01

    The CPLEAR experiment running at CERN, measures CP T and CPT,violating parameters in the neutral kaon system by measuring time dependent decay asymmetries between K0K0 and K0K0 . Physics results corresponding to about 25% of the presently available statistics are presented for the π+π−π+π− and the π+π−π0π+π−π0 decay channels. The present precisions are already at the level of the world average value for ϕϕ+- and one order of magnitude better than the published results for ηη+-o· Moreover, for the first time the amplitude for the CP allowed Ks decay into π+π−π0π+π−π0 has been evaluated.

  16. Recent Results from The CMS Experiment

    CERN Document Server

    Dorigo, Tommaso

    2012-01-01

    The CMS experiment obtained a large number of groundbreaking results from the analysis of 7- and 8-TeV proton-proton collisions produced so far by the Large Hadron Collider at CERN. In this brief summary only a sample of those results will be discussed. A new particle with mass $m_H=125.3 \\pm 0.4(stat.) \\pm 0.5(syst.)$ GeV and characteristics compatible with those expected for a standard model Higgs boson has been observed in its decays to photon pairs, $WW$ pairs, and $ZZ$ pairs. Searches for the rare decays $B_d \\to \\mu \\mu$ and $B_s \\to \\mu \\mu$ have allowed to set limits on the branching fractions which are close to standard model predictions, strongly constraining new physics models. The top quark has been studied with great detail, obtaining among other results the world's best measurement of its mass at $m_t=173.49 \\pm 0.43 (stat.+JES) \\pm 0.98 (syst.)$ GeV. New physics models have been strongly constrained with the available data.

  17. Recent fuel handling experience in Canada

    International Nuclear Information System (INIS)

    Welch, A.C.

    1991-01-01

    For many years, good operation of the fuel handling system at Ontario Hydro's nuclear stations has been taken for granted with the unavailability of the station arising from fuel handling system-related problems usually contributing less than one percent of the total unavailability of the stations. While the situation at the newer Hydro stations continues generally to be good (with the specific exception of some units at Pickering B) some specific and some general problems have caused significant loss of availability at the older plants (Pickering A and Bruce A). Generally the experience at the 600 MWe units in Canada has also continued to be good with Point Lepreau leading the world in availability. As a result of working to correct identified deficiencies, there were some changes for the better as some items of equipment that were a chronic source of trouble were replaced with improved components. In addition, the fuel handling system has been used three times as a delivery system for large-scale non destructive examination of the pressure tubes, twice at Bruce and once at Pickering and performing these inspections this way has saved many days of reactor downtime. Under COG there are several programs to develop improved versions of some of the main assemblies of the fuelling machine head. This paper will generally cover the events relating to Pickering in more detail but will describe the problems with the Bruce Fuelling Machine Bridges since the 600 MW 1P stations have a bridge drive arrangement that is somewhat similar to Bruce

  18. 14 CFR 125.285 - Pilot qualifications: Recent experience.

    Science.gov (United States)

    2010-01-01

    ... 14 Aeronautics and Space 3 2010-01-01 2010-01-01 false Pilot qualifications: Recent experience... Requirements § 125.285 Pilot qualifications: Recent experience. (a) No certificate holder may use any person... last qualification under this paragraph must reestablish recency of experience as provided in paragraph...

  19. 14 CFR 135.247 - Pilot qualifications: Recent experience.

    Science.gov (United States)

    2010-01-01

    ... 14 Aeronautics and Space 3 2010-01-01 2010-01-01 false Pilot qualifications: Recent experience... Flight Crewmember Requirements § 135.247 Pilot qualifications: Recent experience. (a) No certificate... least 1,500 hours of aeronautical experience as a pilot; (B) In each airplane that is type certificated...

  20. 14 CFR 121.439 - Pilot qualification: Recent experience.

    Science.gov (United States)

    2010-01-01

    ... 14 Aeronautics and Space 3 2010-01-01 2010-01-01 false Pilot qualification: Recent experience. 121... Pilot qualification: Recent experience. (a) No certificate holder may use any person nor may any person... required takeoffs and landings within any consecutive 90-day period must reestablish recency of experience...

  1. Recent results from CERN SPS experiments and the future heavy ...

    Indian Academy of Sciences (India)

    Abstract. We describe the important results from the recent experiments using lead beams at the. CERN SPS. The results of the WA98 experiment, which has substantial Indian participation along with the photon multiplicity detector is described in some detail. Combining the preliminary results from various experiments ...

  2. Recent results from CERN SPS experiments and the future heavy ...

    Indian Academy of Sciences (India)

    We describe the important results from the recent experiments using lead beams at the CERN SPS. The results of the WA98 experiment, which has substantial Indian participation along with the photon multiplicity detector is described in some detail. Combining the preliminary results from various experiments looking at ...

  3. Review of recent experiments on magnetic reconnection in laboratory plasmas

    International Nuclear Information System (INIS)

    Yamada, M.

    1995-02-01

    The present paper reviews recent laboratory experiments on magnetic reconnection. Examples will be drawn from electron current sheet experiments, merging spheromaks, and from high temperature tokamak plasmas with the Lundquist numbers exceeding 10 7 . These recent laboratory experiments create an environment which satisfies the criteria for MHD plasma and in which the global boundary conditions can be controlled externally. Experiments with fully three dimensional reconnection are now possible. In the most recent TFTR tokamak discharges, Motional Stark effect (MSE) data have verified the existence of a partial reconnection. In the experiment of spheromak merging, a new plasma acceleration parallel to the neutral line has been indicated. Together with the relationship of these observations to the analysis of magnetic reconnection in space and in solar flares, important physics issues such as global boundary conditions, local plasma parameters, merging angle of the field lines, and the 3-D aspects of the reconnection are discussed

  4. Recent heavy flavor physics results from fixed target experiments

    International Nuclear Information System (INIS)

    Spiegel, L.

    1991-11-01

    Recent results from fixed target experiments in the field of heavy quark flavors, as published or otherwise disseminated in the last year, are reviewed. Emphasis is placed on distilling the main conclusions from these results. 35 refs., 5 figs., 4 tabs

  5. 14 CFR 65.83 - Recent experience requirements.

    Science.gov (United States)

    2010-01-01

    ...) Technically supervised other mechanics; (3) Supervised, in an executive capacity, the maintenance or... (CONTINUED) AIRMEN CERTIFICATION: AIRMEN OTHER THAN FLIGHT CREWMEMBERS Mechanics § 65.83 Recent experience requirements. A certificated mechanic may not exercise the privileges of his certificate and rating unless...

  6. District heating plants in Europe: Recent experience and innovations

    International Nuclear Information System (INIS)

    De Comelli, G.

    1992-01-01

    This paper contains a critical review of recent experience and innovative features encountered in some European district heating plants. The increased application of cogeneration is pointed out, with reference to traditional, as well as, more recent technology which makes use of combined gas-steam cycles. An example of a combined gas-steam cycle is schematically described. The relevance of fluidized bed combustion and interconnection of heat distribution grids, and their consequences to the environmentally-safe and economical employment of the plants, are evidenced

  7. Recent top physics results from the D0 experiment

    Energy Technology Data Exchange (ETDEWEB)

    Brandt, Oleg [Gottingen U., II. Phys. Inst.

    2012-09-01

    We review recent measurements of the properties of the top quark by the D0 experiment: the decay width of the top quark, the CKM matrix element $V_{tb}$, the helicity of the $W$ boson, anomalous couplings at the $Wtb$ vertex, violation of invariance under Lorentz transformations, and the asymmetry of $\\ttbar$ production due to the strong colour charge. The measurements are performed using data samples of up to 5.4 \\fb\\ acquired by the D0 experiment in Run II of the Fermilab Tevatron $p\\bar p$ collider at a centre-of-mass energy of $\\sqrt s=1.96 \\TeV$.

  8. Recent results from the star thrust experiment (STX)

    International Nuclear Information System (INIS)

    Slough, J.; Miller, K.

    1999-01-01

    The field reversed configuration (FRC) is a high beta plasma with a closed magnetic field geometry. Emphasizing the compact structure and high-density plasma, FRC concept has been proposed as a space power source and space propulsion system as well. The most plasma confinement concepts are unsuited for space power production due to the complex structure and large size. The stability of FRC has remained uncertain because of a lack of magnetic shear. Most experiments have indicated the robustness of FRC configuration, while stability analyses using fluid model equations lead to a definite instability, tilling mode. Recent FRC experiments have emphasized the effect of a rotating magnetic field. (M. Tanaka)

  9. Overview of recent results from the ATLAS experiment

    CERN Document Server

    Grabowska-Bold, Iwona; The ATLAS collaboration

    2017-01-01

    The heavy-ion program in the ATLAS experiment at the LHC originated as an extensive program to probe and characterize the hot, dense matter created in relativistic lead-lead collisions. In recent years, the program has also broadened to a detailed study of collective behavior in smaller systems. In particular, the techniques used to study larger systems are also applied to proton-proton and proton-lead collisions over a wide range of particle multiplicities, to try and understand the early-time dynamics which lead to similar flow-like features in all of the systems. Another recent development is a program studying ultra-peripheral collisions, which provide gamma-gamma and photonuclear processes over a wide range of CM energy, to probe the nuclear wavefunction. This talk presents the most recent results from the ATLAS experiment based on Run 1 and Run 2 data, including measurements of collectivity over a wide range of collision systems, potential nPDF modifications — using electroweak bosons, inclusive jets,...

  10. Target selection biases from recent experience transfer across effectors.

    Science.gov (United States)

    Moher, Jeff; Song, Joo-Hyun

    2016-02-01

    Target selection is often biased by an observer's recent experiences. However, not much is known about whether these selection biases influence behavior across different effectors. For example, does looking at a red object make it easier to subsequently reach towards another red object? In the current study, we asked observers to find the uniquely colored target object on each trial. Randomly intermixed pre-trial cues indicated the mode of action: either an eye movement or a visually guided reach movement to the target. In Experiment 1, we found that priming of popout, reflected in faster responses following repetition of the target color on consecutive trials, occurred regardless of whether the effector was repeated from the previous trial or not. In Experiment 2, we examined whether an inhibitory selection bias away from a feature could transfer across effectors. While priming of popout reflects both enhancement of the repeated target features and suppression of the repeated distractor features, the distractor previewing effect isolates a purely inhibitory component of target selection in which a previewed color is presented in a homogenous display and subsequently inhibited. Much like priming of popout, intertrial suppression biases in the distractor previewing effect transferred across effectors. Together, these results suggest that biases for target selection driven by recent trial history transfer across effectors. This indicates that representations in memory that bias attention towards or away from specific features are largely independent from their associated actions.

  11. Recent operating experiences and programs at EBR-II

    International Nuclear Information System (INIS)

    Lentz, G.L.

    1984-01-01

    Experimental Breeder Reactor No. II (EBR-II) is a pool-type, unmoderated, sodium-cooled reactor with a design power of 62.5 MWt and an electrical generation capability of 20 MW. It has been operated by Argonne National Laboratory for the US government for almost 20 years. During that time, it has operated safely and has demonstrated stable operating characteristics, high availability, and excellent performance of its sodium components. The 20 years of operating experience of EBR-II is a valuable resource to the nuclear community for the development and design of future LMFBR's. Since past operating experience has been extensively reported, this report will focus on recent programs and events

  12. Impacts evaluation: recent experience in rural electrification; Avaliacao de impactos: experiencia recente em eletrificacao rural

    Energy Technology Data Exchange (ETDEWEB)

    Pereira, Marcio Giannini; Rodrigues, Alexia de Freitas; Paz, Luciana Rocha Leal da [Centro de Pesquisas de Energia Eletrica (CEPEL), Rio de Janeiro, RJ (Brazil); Camacho, Cristiane Farias [Fundacao Padre Leonel Franca (FPLF), Rio de Janeiro, RJ (Brazil)

    2008-07-01

    The electric power is one of the important requirements for the promotion of the social inclusion and of the development, especially in rural areas. In order to fill out this gap, the Brazilian government established as a goal reaches the universalization of the public electric energy services to provide conditions for the improvement of the quality of life of the urban and rural population. In this sense, the evaluation of the recent experiences in rural electrification can be of great help to achieve this objective in an efficient way. The results of such evaluation can point out some actions for the universalization of the attendance seeking for the continuous improvement of the planning and decision making process, either in the direction of the attendance of the proposed goals or in the poverty mitigation. (author)

  13. A summary of recent results from the GRAPES-3 experiment

    Directory of Open Access Journals (Sweden)

    Gupta S.K.

    2017-01-01

    Full Text Available The GRAPES-3 experiment is a combination of a high density extensive air shower (EAS array of nearly 400 plastic scintillator detectors, and a large 560 m2 area tracking muon telescope with an energy threshold Eμ >1 GeV. GRAPES-3 has been operating continuously in Ooty, India since 2000. By accurately correcting for the effects of atmospheric pressure and temperature, the muon telescope provides a high precision directional survey of the galactic cosmic ray (GCR intensity. This telescope has been used to observe the acceleration of muons during thunderstorm events. The recent discovery of a transient weakening of the Earth's magnetic shield through the detection of a GCR burst was the highlight of the GRAPES-3 results. We have an ongoing major expansion activity to further enhance the capability of the GRAPES-3 muon telescope by doubling its area.

  14. Financing of nuclear projects. Lessons from a recent experience

    International Nuclear Information System (INIS)

    Shubert, U.

    2004-01-01

    The advantages of mandating BNP Paribas as a lead bank and arranger for NPP Belene are presented. BNPP has an excellent record and credentials in Nuclear Power Plant Projects internationally and in the local energy sector and very recent experience as a lead bank for the fifth nuclear power plant in Finland. BNPP has a proven track record as Provider of rapid and efficient ECA financing in terms of: managing in parallel the number of ECA contractual relations, so as to provide 'matching opportunities' between the ECAs and leverage to improve their terms and conditions, and to harmonize them in one set of unified legal documentation. There is no cost to the Government of Bulgaria until the signing of the Facility Documentation

  15. Recent progress of laser spectroscopy experiments on antiprotonic helium

    Science.gov (United States)

    Hori, Masaki

    2018-03-01

    The Atomic Spectroscopy and Collisions Using Slow Antiprotons (ASACUSA) collaboration is currently carrying out laser spectroscopy experiments on antiprotonic helium ? atoms at CERN's Antiproton Decelerator facility. Two-photon spectroscopic techniques have been employed to reduce the Doppler width of the measured ? resonance lines, and determine the atomic transition frequencies to a fractional precision of 2.3-5 parts in 109. More recently, single-photon spectroscopy of buffer-gas cooled ? has reached a similar precision. By comparing the results with three-body quantum electrodynamics calculations, the antiproton-to-electron mass ratio was determined as ?, which agrees with the known proton-to-electron mass ratio with a precision of 8×10-10. The high-quality antiproton beam provided by the future Extra Low Energy Antiproton Ring (ELENA) facility should enable further improvements in the experimental precision. This article is part of the Theo Murphy meeting issue `Antiproton physics in the ELENA era'.

  16. Kaon experiments at CERN: recent results and prospects

    CERN Document Server

    Goudzovski, Evgueni

    2016-11-29

    The NA48/2 and NA62-$R_K$ experiments at the CERN SPS collected large samples of charged kaon decays in flight in 2003--07. The data analysis is still on-going (with over 20 publications produced so far); the recent results from these experiments are presented. A new upper limit on the rate of a lepton number violating decay $K^\\pm\\to\\pi^\\mp\\mu^\\pm\\mu^\\pm$ is reported: $\\mathcal{B} < 8.6\\times 10^{-11}$ at 90\\% CL. Searches for heavy sterile neutrino $N_4$ and neutral scalar resonances ($\\chi$) in $K^\\pm\\to\\pi\\mu\\mu$ decays are reported. Upper limits on the products $\\mathcal{B}(K^\\pm\\to\\mu^\\pm N_4)\\mathcal{B}(N_4\\to\\pi^\\mp\\mu^\\pm)$ and $\\mathcal{B}(K^\\pm\\to\\pi^\\pm \\chi)\\mathcal{B}(\\chi\\to\\mu^+\\mu^-)$ are set in the range $10^{-10}$ to $10^{-9}$ for resonance lifetimes up to 100~ps. A preliminary measurement of the electromagnetic transition form factor slope of the $\\pi^0$ from $1.05\\times 10^6$ fully reconstructed $\\pi^0\\to\\gamma e^+e^-$ decays is presented: the obtained result $a = (3.70 \\pm 0.53_\\text{...

  17. Kaon experiments at CERN: recent results and prospects

    Directory of Open Access Journals (Sweden)

    Goudzovski Evgueni

    2016-01-01

    Full Text Available The NA48/2 and NA62-RK experiments at the CERN SPS collected large samples of charged kaon decays in flight in 2003–07. The data analysis is still on-going (with over 20 publications produced so far; the recent results from these experiments are presented. A new upper limit on the rate of a lepton number violating decay K± →π∓μ±μ± is reported: B< 8.6×10−11 at 90% CL. Searches for heavy sterile neutrino N4 and neutral scalar resonances (χ in K± → πμμ decays are reported. Upper limits on the products B(K± → μ±N4B(N4 → π∓μ± and B(K± → π±χB(χ → μ+μ− are set in the range 10−10 to 10−9 for resonance lifetimes up to 100 ps. A preliminary measurement of the electromagnetic transition form factor slope of the π0 from 1.05 × 106 fully reconstructed π0 → γe+e− decays is presented: the obtained result a = (3:70 ± 0:53stat ± 0:36syst × 10−2 represents the first observation of a non-zero slope in the time-like region of momentum transfer.

  18. Pathology Course Director Perspectives of a Recent LCME Experience

    Directory of Open Access Journals (Sweden)

    Barbara E. C. Knollmann-Ritschel MD

    2017-01-01

    Full Text Available Preparation for a Liaison Committee of Medical Education (LCME accreditation site visit is a daunting task for any medical school, particularly for medical schools that have adopted integrated curricula. The LCME accreditation is the standard that all US and Canadian allopathic medical schools must meet in order for the school to award the degree of medical doctor. The Uniformed Services University of the Health Sciences (USU recently underwent a full-scale LCME accreditation visit that was conducted under the newly revised LCME standards and elements. The site visit occurred just 5 years after our school began implementing a totally revised, organ system-based curriculum. Preparing for a critical, high-stakes site visit shortly after transitioning to a totally revised, integrated module-based preclerkship curriculum presented an array of new challenges that required a major modification to the type of preparation, communication, and collaboration that traditionally occurs between course directors and departmental chairs. These included the need to ensure accurate, timely communication of curricular details to different levels of the academic administration, particularly as it related to the execution of self-directed learning (SDL. Preparation for our site visit, did, however, provide a novel opportunity to highlight the unique educational experiences associated with the study of pathology, as pathology traverses both clinical and basic sciences. Sharing these experiences may be useful to other programs that are either undergoing or who are preparing to undergo an accreditation visit and may also aid in a broader communication of the highlights or initiatives of educational activities.

  19. Recent high-speed ballistics experiments at ORNL

    International Nuclear Information System (INIS)

    Combs, S.K.; Gouge, M.J.; Baylor, L.R.; Fisher, P.W.; Foster, C.A.; Foust, C.R.; Milora, S.L.; Qualls, A.L.

    1994-01-01

    Oak Ridge National Laboratory (ORNL) has been developing pellet injectors for plasma fueling experiments on magnetic confinement devices for almost 20 years. With these devices, pellets (1 to 8 mm in diameter) composed of hydrogen isotopes are formed (at temperatures <20 K) and typically accelerated to speeds of ∼ 1.0 to 2.0 km/s for injection into plasmas of experimental fusion devices. A variety of pellet injector designs have been developed at ORNL, including repeating pneumatic injectors (single- and multiple-barrel light gas guns) that can inject up to hundreds of pellets for long-pulse plasma operation. The repeating pneumatic injectors are of particular importance because long-pulse fueling is required for present large experimental fusion devices, with steady-state operation the objective for future fusion reactors. In this paper, recent advancements in the development of repeating pneumatic injectors are described, including (1) a small-bore (1.8-mm), high-firing-rate (10-Hz) version of a single-stage light gas gun; (2) a repeating single-stage light gas gun for 8-mm-diam tritium pellets; (3) a repeating two-stage light gas gun for operation at higher pellet velocities; and (4) a steady-state hydrogen extruder feed system

  20. Recent experience of Almaraz NPP in operator training

    International Nuclear Information System (INIS)

    Sanchez Cabanero, J.G.; Gomez de la Torre, J.M.

    1994-01-01

    In recent years the nuclear industry has been paying special attention to boosting nuclear power plant operation. To this end, it has optimized its maintenance, engineering, safety, management and other systems, using the appropriate resources to achieve its target. Optimization of these systems required the allocation of new resources for training plant personnel. The activity of training, which hitherto dedicated most of its attention and resources to the operating area, now extends them to schooling required in other areas of the plant, with the aim of updating the skills and knowledge of personnel to deal with new needs which have arisen. Regulations at present cover the training and qualification of only personnel responsible for handling reactor or for directing plant operation activities and capable of evaluating the nature and magnitude of possible incidents, especially those causing radioactive emissions, and of personnel requiring knowledge and experience to guarantee effective protection of individuals, ie, operators, supervisors, and qualified radiological protection experts. However, it should be borne in mind that, in the future, the training of other plant personnel could also be subject to regulations. (Author)

  1. The motion of light interstitials in metals: Recent experiments

    International Nuclear Information System (INIS)

    Richter, D.

    1986-01-01

    Recent theoretical considerations suggest, that at low temperatures the transport properties of light interstitials in metals are dominated by the interaction with the conduction electrons. After briefly surveying the state of the theory, experimental examples for the low and high temperature cases are presented. We begin with the low T regime and display first neutron scattering experiments on H trapped at O-impurities in Nb where a coherent tunneling state is observed. Its dependence on temperature and its properties in normal and superconducting Nb are discussed. Thereafter muon diffusion results in Al are examined. In Al muon diffusion is observed via diffusion limited trapping and local properties of the impurity as well as long range diffusion are playing a role. Using a large variety of impurities it was possible to evaluate the diffusion coefficient over a large T-range. Muon motion in Al at accessible temperatures falls entirely in the hopping regime and constitutes an example for the high T regime of the theory. (orig.)

  2. Recent experiences and future expectations in data storage technology

    Energy Technology Data Exchange (ETDEWEB)

    Pfister, J.

    1990-04-01

    For more than 10 years the conventional media for High Energy Physics has been 9 track magnetic tape in various densities. More recently, especially in Europe, the IBM 3480 technology has been adopted while in the United States, especially at Fermilab, 8mm is being used by the largest experiments as a primary recording media and where possible they are using 8mm for the production, analysis and distribution of data summary tapes. VHS and Digital Audio tape have recurrently appeared but seem to serve primarily as back-up storage media. The reasons for what appear to be a radical departure are many. Economics, form factor, and convenience are dominant among the reasons. The traditional data media suppliers seem to have been content to evolve the traditional media at their own pace with only modest enhancements primarily in value engineering'' of extant products. Meanwhile, start-up companies providing small system and workstations sought other media both to reduce the price of their offerings and respond to the real need of lower cost back-up for lower cost systems. This happening in a market context where traditional computer systems vendors were leaving the tape market altogether or shifting to 3480'' technology which has certainly created a climate for reconsideration and change. The newest data storage products, in most cases, are not coming from the technologies developed by the computing industry but by the audio and video industry. Just where these flopticals, opticals, 19 mm tape and the new underlying technologies, such as, digital paper'' may fit in the HEP computing requirement picture will be reviewed. What these technologies do for and to HEP will be discussed along with some suggestions for a methodology for tracking and evaluating extant and emerging technologies.

  3. Recent Experiences in Aftershock Hazard Modelling in New Zealand

    Science.gov (United States)

    Gerstenberger, M.; Rhoades, D. A.; McVerry, G.; Christophersen, A.; Bannister, S. C.; Fry, B.; Potter, S.

    2014-12-01

    The occurrence of several sequences of earthquakes in New Zealand in the last few years has meant that GNS Science has gained significant recent experience in aftershock hazard and forecasting. First was the Canterbury sequence of events which began in 2010 and included the destructive Christchurch earthquake of February, 2011. This sequence is occurring in what was a moderate-to-low hazard region of the National Seismic Hazard Model (NSHM): the model on which the building design standards are based. With the expectation that the sequence would produce a 50-year hazard estimate in exceedance of the existing building standard, we developed a time-dependent model that combined short-term (STEP & ETAS) and longer-term (EEPAS) clustering with time-independent models. This forecast was combined with the NSHM to produce a forecast of the hazard for the next 50 years. This has been used to revise building design standards for the region and has contributed to planning of the rebuilding of Christchurch in multiple aspects. An important contribution to this model comes from the inclusion of EEPAS, which allows for clustering on the scale of decades. EEPAS is based on three empirical regressions that relate the magnitudes, times of occurrence, and locations of major earthquakes to regional precursory scale increases in the magnitude and rate of occurrence of minor earthquakes. A second important contribution comes from the long-term rate to which seismicity is expected to return in 50-years. With little seismicity in the region in historical times, a controlling factor in the rate is whether-or-not it is based on a declustered catalog. This epistemic uncertainty in the model was allowed for by using forecasts from both declustered and non-declustered catalogs. With two additional moderate sequences in the capital region of New Zealand in the last year, we have continued to refine our forecasting techniques, including the use of potential scenarios based on the aftershock

  4. Recent results and highlights from the ATLAS experiment

    CERN Document Server

    AUTHOR|(INSPIRE)INSPIRE-00211911; The ATLAS collaboration

    2016-01-01

    After a 2-year stop for the upgrade of the detector, since 2015 the ATLAS collaboration has collected data for over 20 fb$^{-1}$ at 13 TeV centre-of-mass energy of pp collisions at the LHC. In this talk a summary of recent measurements of Higgs boson properties, BSM Higgs searches and the status with the resonance at 750 GeV will be presented. Also some of most recent SM and electroweak results will be highlighted.

  5. Recent results and highlights from the ATLAS experiment

    CERN Document Server

    Caforio, Davide; The ATLAS collaboration

    2016-01-01

    After a 2-year stop for the upgrade of the detector, since 2015 the ATLAS collaboration has collected data for over 20 fb-1 at 13 TeV centre-of-mass energy of pp collisions at the LHC. In this talk a summary of recent measurements of Higgs boson properties, BSM Higgs searches and the situation with the resonance at 750 GeV will be presented. Also some of most recent SM and Electroweak results will be highlighted.

  6. Staff-less libraries - recent Danish public library experiences

    DEFF Research Database (Denmark)

    Johannsen, Carl Gustav

    2012-01-01

    The article reports on Danish experiences with staff-less public libraries in terms of local community characteristics, their use- visits and loans, characcteristics of their users in terms of sex, age and, finally, an analysis of critical success factors revealed......The article reports on Danish experiences with staff-less public libraries in terms of local community characteristics, their use- visits and loans, characcteristics of their users in terms of sex, age and, finally, an analysis of critical success factors revealed...

  7. Recent results from the IGEX double beta decay experiment

    International Nuclear Information System (INIS)

    Aalseth, C.E.; Avignone, F.T. III; Brodzinski, R.L.; Collar, J.I.; Garcia, E.; Gonzales, D.; Hasenbalg, F.; Hensley, W.K.; Kirpichnikov, I.V.; Klimenko, A.A.; Miley, H.S.; Morales, A.; Morales, J.; Ortiz de Solorzano, A.; Osetrov, S.B.; Pogosov, V.S.; Puimedon, J.; Reeves, J.H.; Saenz, C.; Salinas, A.; Sarsa, M.L.; Smolnikov, A.A.; Starostin, A.S.; Tamanyan, A.G.; Vasenko, A.A.; Vasiliev, S.I.; Villar, J.A.

    1996-01-01

    The International Germanium Experiment (IGEX) has six detectors, containing >90 fiducial moles of 76 Ge, operating underground. Data thus far yield T 2ν 1/2 =(1.1±0.2).10 21 y and T 0ν 1/2 > 4.2.10 24 y (90% CL) if interpreted as a null experiment, or T 0ν 1/2 > 3.3.10 24 y (95% CL) in the most conservative case. (orig.)

  8. Computing and data handling recent experiences at Fermilab and SLAC

    International Nuclear Information System (INIS)

    Cooper, P.S.

    1990-01-01

    Computing has become evermore central to the doing of high energy physics. There are now major second and third generation experiments for which the largest single cost is computing. At the same time the availability of ''cheap'' computing has made possible experiments which were previously considered infeasible. The result of this trend has been an explosion of computing and computing needs. I will review here the magnitude of the problem, as seen at Fermilab and SLAC, and the present methods for dealing with it. I will then undertake the dangerous assignment of projecting the needs and solutions forthcoming in the next few years at both laboratories. I will concentrate on the ''offline'' problem; the process of turning terabytes of data tapes into pages of physics journals. 5 refs., 4 figs., 4 tabs

  9. Recent results and prospects for NA62 experiment

    Science.gov (United States)

    Martellotti, Silvia; Aglieri Rinella, G.; Aliberti, R.; Ambrosino, F.; Ammendola, R.; Angelucci, B.; Antonelli, A.; Anzivino, G.; Arcidiacono, R.; Azhinenko, I.; Balev, S.; Barbanera, M.; Bendotti, J.; Biagioni, A.; Bician, L.; Biino, C.; Bizzeti, A.; Blazek, T.; Blik, A.; Bloch-Devaux, B.; Bolotov, V.; Bonaiuto, V.; Boretto, M.; Bragadireanu, M.; Britton, D.; Britvich, G.; Brunetti, M. B.; Bryman, D.; Bucci, F.; Butin, F.; Capitolo, E.; Capoccia, C.; Capussela, T.; Cassese, A.; Catinaccio, A.; Cecchetti, A.; Ceccucci, A.; Cenci, P.; Cerny, V.; Cerri, C.; Checcucci, B.; Chikilev, O.; Chiozzi, S.; Ciaranfi, R.; Collazuol, G.; Conovaloff, A.; Cooke, P.; Cooper, P.; Corradi, G.; Cortina Gil, E.; Costantini, F.; Cotorobai, F.; Cotta Ramusino, A.; Coward, D.; D'Agostini, G.; Dainton, J.; Dalpiaz, P.; Danielsson, H.; Degrange, J.; De Simone, N.; Di Filippo, D.; Di Lella, L.; Di Lorenzo, S.; Dixon, N.; Doble, N.; Dobrich, B.; Duk, V.; Elsha, V.; Engelfried, J.; Enik, T.; Estrada, N.; Falaleev, V.; Fantechi, R.; Fascianelli, V.; Federici, L.; Fedotov, S.; Fiorini, M.; Fry, J.; Fu, J.; Fucci, A.; Fulton, L.; Gallorini, S.; Galeotti, S.; Gamberini, E.; Gatignon, L.; Georgiev, G.; Gianoli, A.; Giorgi, M.; Giudici, S.; Glonti, L.; Goncalves Martins, A.; Gonnella, F.; Goudzovski, E.; Guida, R.; Gushchin, E.; Hahn, F.; Hallgren, B.; Heath, H.; Herman, F.; Husek, T.; Hutanu, O.; Hutchcroft, D.; Iacobuzio, L.; Iacopini, E.; Imbergamo, E.; Jamet, O.; Jarron, P.; Jones, E.; Kampf, K.; Kaplon, J.; Kekelidze, V.; Kholodenko, S.; Khoriauli, G.; Khotyantsev, A.; Khudyakov, A.; Kiryushin, Yu.; Kleimenova, A.; Kleinknecht, K.; Kluge, A.; Koval, M.; Kozhuharov, V.; Krivda, M.; Kucerova, Z.; Kudenko, Y.; Kunze, J.; Lamanna, G.; Latino, G.; Lazzeroni, C.; Lehmann-Miotto, G.; Lenci, R.; Lenti, M.; Leonardi, E.; Lichard, P.; Lietava, R.; Litov, L.; Lollini, R.; Lomidze, D.; Lonardo, A.; Lupi, M.; Lurkin, N.; McCormick, K.; Madigozhin, D.; Maire, G.; Mandeiro, C.; Mannelli, I.; Mannocchi, G.; Mapelli, A.; Marchetto, F.; Marchevski, R.; Martellotti, S.; Massarotti, P.; Massri, K.; Matak, P.; Maurice, E.; Mefodev, A.; Menichetti, E.; Minucci, E.; Mirra, M.; Misheva, M.; Molokanova, N.; Morant, J.; Morel, M.; Moulson, M.; Movchan, S.; Munday, D.; Napolitano, M.; Neri, I.; Newson, F.; Norton, A.; Noy, M.; Nuessle, G.; Numao, T.; Obraztsov, V.; Ostankov, A.; Padolski, S.; Page, R.; Palladino, V.; Paoluzzi, G.; Parkinson, C.; Pedreschi, E.; Pepe, M.; Perez Gomez, F.; Perrin-Terrin, M.; Peruzzo, L.; Petrov, P.; Petrucci, F.; Piandani, R.; Piccini, M.; Pietreanu, D.; Pinzino, J.; Polenkevich, I.; Pontisso, L.; Potrebenikov, Yu.; Protopopescu, D.; Raffaelli, F.; Raggi, M.; Riedler, P.; Romano, A.; Rubin, P.; Ruggiero, G.; Russo, V.; Ryjov, V.; Salamon, A.; Salina, G.; Samsonov, V.; Santoni, C.; Saracino, G.; Sargeni, F.; Semenov, V.; Sergi, A.; Serra, M.; Shaikhiev, A.; Shkarovskiy, S.; Skillicorn, I.; Soldi, D.; Sotnikov, A.; Sougonyaev, V.; Sozzi, M.; Spadaro, T.; Spinella, F.; Staley, R.; Sturgess, A.; Sutcliffe, P.; Szilasi, N.; Tagnani, D.; Trilov, S.; Valdata-Nappi, M.; Valente, P.; Vasile, M.; Vassilieva, T.; Velghe, B.; Veltri, M.; Venditti, S.; Vicini, P.; Volpe, R.; Vormstein, M.; Wahl, H.; Wanke, R.; Wertelaers, P.; Winhart, A.; Winston, R.; Wrona, B.; Yushchenko, O.; Zamkovsky, M.; Zinchenko, A.; NA62 Collaboration

    2017-04-01

    The K+ →π+ ν ν ‾ decay is theoretically one of the cleanest meson decays and so a good place to look for indirect effects of new physics complementary to LHC searches. The NA62 experiment at CERN is designed to measure the branching ratio of this decay with 10% precision. NA62 was commissioned in October 2014, took data in pilot runs in 2014 and 2015. The NA62 experimental setup is illustrated and data quality is reported.

  10. Green Power Marketing Abroad: Recent Experience and Trends

    Energy Technology Data Exchange (ETDEWEB)

    Bird, L.; Wustenhagen, R.; Aabakken, J.

    2002-04-01

    Green power marketing--the act of differentially selling electricity generated wholly or in part from renewable sources--has emerged in more than a dozen countries around the world. This report reviews green power marketing activity abroad to gain additional perspective on consumer demand and to discern key factors or policies that affect the development of green power markets. The objective is to draw lessons from experience in other countries that could be applicable to the U.S. market.

  11. Data System Architectures: Recent Experiences from Data Intensive Projects

    Science.gov (United States)

    Palanisamy, G.; Frame, M. T.; Boden, T.; Devarakonda, R.; Zolly, L.; Hutchison, V.; Latysh, N.; Krassovski, M.; Killeffer, T.; Hook, L.

    2014-12-01

    U.S. Federal agencies are frequently trying to address new data intensive projects that require next generation of data system architectures. This presentation will focus on two new such architectures: USGS's Science Data Catalog (SDC) and DOE's Next Generation Ecological Experiments - Arctic Data System. The U.S. Geological Survey (USGS) developed a Science Data Catalog (data.usgs.gov) to include records describing datasets, data collections, and observational or remotely-sensed data. The system was built using service oriented architecture and allows USGS scientists and data providers to create and register their data using either a standards-based metadata creation form or simply to register their already-created metadata records with the USGS SDC Dashboard. This dashboard then compiles the harvested metadata records and sends them to the post processing and indexing service using the JSON format. The post processing service, with the help of various ontologies and other geo-spatial validation services, auto-enhances these harvested metadata records and creates a Lucene index using the Solr enterprise search platform. Ultimately, metadata is made available via the SDC search interface. DOE's Next Generation Ecological Experiments (NGEE) Arctic project deployed a data system that allows scientists to prepare, publish, archive, and distribute data from field collections, lab experiments, sensors, and simulated modal outputs. This architecture includes a metadata registration form, data uploading and sharing tool, a Digital Object Identifier (DOI) tool, a Drupal based content management tool (http://ngee-arctic.ornl.gov), and a data search and access tool based on ORNL's Mercury software (http://mercury.ornl.gov). The team also developed Web-metric tools and a data ingest service to visualize geo-spatial and temporal observations.

  12. Simulations, Diagnostics and Recent Results of the VISA II Experiment

    CERN Document Server

    Andonian, G; Pellegrini, C; Reiche, S; Rosenzweig, J B; Travish, G

    2005-01-01

    The VISA II experiment entails use of a chirped beam to drive a high gain SASE FEL. The output radiation is diagnosed with a modified frequency resolved optical gating (FROG) technique. Sextupoles are implemented to correct the lonigtudinal aberrations affecting the high energy spread chirped beam during transport to the undulator. The double differential energy spectrum is measured with a pair of slits and a set of gratings. In this paper, we report on start-to-end simulations, radiation diagnostics, as well as intial experimental results; experimental methods are described.

  13. Canadian fuel development program and recent operational experience

    International Nuclear Information System (INIS)

    Cox, D.S.; Kohn, E.; Lau, J.H.K.; Dicke, G.J.; Macici, N.N.; Sancton, R.W.

    1995-01-01

    This paper provides an overview of the current Canadian CANDU fuel R and D programs and operational experience. The details of operational experience for fuel in Canadian reactors are summarized for the period 1991-1994; excellent fuel performance has been sustained, with steady-state bundle defect rates currently as low as 0.02%. The status of introducing long 37-element bundles, and bundles with rounded bearing pads is reviewed. These minor changes in fuel design have been selectively introduced in response to operational constraints (end-plate cracking and pressure-tube fretting) at Ontario Hydro's Bruce-B and Darlington stations. The R and D programs are generating a more complete understanding of CANDU fuel behaviour, while the CANDU Owners Group (COG) Fuel Technology Program is being re-aligned to a more exclusive focus on the needs of operating stations. Technical highlights and realized benefits from the COG program are summarized. Re-organization of AECL to provide a one-company focus, with an outward looking view to new CANDU markets, has strengthened R and D in advanced fuel cycles. Progress in AECL's key fuel cycle programs is also summarized. (author)

  14. The experience of infertility: a review of recent literature.

    Science.gov (United States)

    Greil, Arthur L; Slauson-Blevins, Kathleen; McQuillan, Julia

    2010-01-01

    About 10 years ago Greil published a review and critique of the literature on the socio-psychological impact of infertility. He found at the time that most scholars treated infertility as a medical condition with psychological consequences rather than as a socially constructed reality. This article examines research published since the last review. More studies now place infertility within larger social contexts and social scientific frameworks although clinical emphases persist. Methodological problems remain but important improvements are also evident. We identify two vigorous research traditions in the social scientific study of infertility. One tradition uses primarily quantitative techniques to study clinic patients in order to improve service delivery and to assess the need for psychological counselling. The other tradition uses primarily qualitative research to capture the experiences of infertile people in a sociocultural context. We conclude that more attention is now being paid to the ways in which the experience of infertility is shaped by social context. We call for continued progress in the development of a distinctly sociological approach to infertility and for the continued integration of the two research traditions identified here.

  15. Hadron distributions - recent results from the CERN experiment NA44

    International Nuclear Information System (INIS)

    Xu, N.

    1996-01-01

    Proton distributions at midrapidity have been measured for 158A circ GeV/c Pb + Pb collisions in the focusing spectrometer experiment NA44 at CERN. A high degree of nuclear stopping is found in the truly heavy ion collisions. Systematic results of single particle transverse momentum distributions of pions, kaons, and protons, of 200A-GeV/c S+S and 158A circ GeV/c Pb+Pb central collisions will be addressed within the context of thermalization. By comparing these data with thermal and transport models, freeze-out parameters such as the temperature parameter T fo and mean collective flow velocity (Β) are extracted. Preliminary results of the particle ratios of K - /K + and p/p are discussed in the context of cascade models of RQMD and VENUS

  16. Recent results from the National Spherical Torus Experiment

    International Nuclear Information System (INIS)

    Maingi, R; Bell, M G; Bell, R E; Bialek, J; Bourdelle, C; Bush, C E; Darrow, D S; Fredrickson, E D; Gates, D A; Gilmore, M; Gray, T; Jarboe, T R; Johnson, D W; Kaita, R; Kaye, S M; Kubota, S; Kugel, H W; LeBlanc, B P; Maqueda, R J; Mastrovito, D; Medley, S S; Menard, J E; Mueller, D; Nelson, B A; Ono, M; Paoletti, F; Park, H K; Paul, S F; Peebles, T; Peng, Y-K M; Phillips, C K; Raman, R; Rosenberg, A L; Roquemore, A L; Ryan, P M; Sabbagh, S A; Skinner, C H; Soukhanovskii, V A; Stutman, D; Swain, D W; Synakowski, E J; Taylor, G; Wilgen, J; Wilson, J R; Wurden, G A; Zweben, S J

    2003-01-01

    The National Spherical Torus Experiment (NSTX) is a low aspect-ratio fusion research facility whose research goal is to make a determination of the attractiveness of the spherical torus concept in the areas of high-β stability, confinement, current drive, and divertor physics. Remarkable progress was made in extending the operational regime of the device in FY 2002. In brief, β t of 34% and β N of 6.5 were achieved. H-mode became the main operational regime, and energy confinement exceeded conventional aspect-ratio tokamak scalings. Heating was demonstrated with the radiofrequency antenna, and signatures of current drive were observed. Current initiation with coaxial helicity injection produced discharges of 400 kA, and first measurements of divertor heat flux profiles in H-mode were made

  17. Recent Results on Forward Physics from the CMS Experiment

    CERN Document Server

    Baus, Colin

    2013-01-01

    It is one of the aims of the CMS experiment at the LHC to improve the understanding of hadronicmultiparticle production and QCD in general. Of particular interest to the astroparticle physics community are theforward physics results, which probe the phase space where most of the primary energy in high energy collisionsflows to. On the other hand the forward region is also where the small-x part of the hadronic wave-functions canbe studied best. The parton distribution in hadrons at small-x is most uncertain and, for example, the search for theonset of saturation is ongoing. Data from CMS are already improving the hadronic event generators available tothe analysis of cosmic ray data. Here we are reviewing some of the latests developments.

  18. Recent results on dimuon production from the NA38 experiment

    International Nuclear Information System (INIS)

    Lourenco, C.

    1995-01-01

    We report on the production of intermediate and high mass muon pairs in p-A and S-U collisions, as measured by the NA38 experiment at the CERN SPS. The ratio between ψ' and J/ψ cross-sections is found to be constant in p-A interactions but decreases from p-A to S-U and as the released transverse energy, E T , increases. While the p-A intermediate mass continuum is well explained by the superposition of Drell-Yan and charm contributions, the signal observed in the S-U data is larger than the linear extrapolation of the proton-nucleus results. No correlation is seen between dimuon and direct photon production. (orig.)

  19. Remote sensing terminology: past experience and recent needs

    Science.gov (United States)

    Kancheva, Rumiana

    2013-10-01

    Terminology is a key issue for a better understanding among people using various languages. Terminology accuracy is essential during all phases of international cooperation. It is crucial to keep up with the latest quantitative and qualitative developments and novelties of the terminology in advanced technology fields such as aerospace science and industry. This is especially true in remote sensing and geoinformatics which develop rapidly and have wide and ever extending applications in various domains of human activity. The importance of the correct use of remote sensing terms refers not only to people working in this field but also to experts in many disciplines who handle remote sensing data and information products. The paper is devoted to terminology issues that refer to all aspects of remote sensing research and application areas. The attention is drawn on the recent needs and peculiarities of compiling specialized dictionaries in the subject area of remote sensing. Details are presented about the work in progress on the preparation of an English-Bulgarian dictionary of remote sensing terms focusing on Earth observations and geoinformation science. Our belief is that the elaboration of bilingual and multilingual dictionaries and glossaries in this spreading, most technically advanced and promising field of human expertise is of great practical importance. Any interest in cooperation and initiating of suchlike collaborative multilingual projects is welcome and highly appreciated.

  20. Pharmaceutical cost-containment policies and sustainability: recent Irish experience.

    Science.gov (United States)

    Kenneally, Martin; Walshe, Valerie

    2012-01-01

    Our objective is to review and assess the main pharmaceutical cost-containment policies used in Ireland in recent years, and to highlight how a policy that improved fiscal sustainability but worsened economic sustainability could have improved both if an option-based approach was implemented. The main public pharmaceutical cost-containment policy measures including reducing the ex-factory price of drugs, pharmacy dispensing fees and community drug scheme coverage, and increasing patient copayments are outlined along with the resulting savings. We quantify the cost implications of a new policy that restricts the entitlement to free prescription drugs of persons older than 70 years and propose an alternative option-based policy that reduces the total cost to both the state and the patient. This set of policy measures reduced public spending on community drugs by an estimated €380m in 2011. The policy restricting free prescription drugs for persons older than 70 years, though effective in reducing public cost, increased the total cost of the drugs supplied. The policy-induced cost increase stems from a fees anomaly between the two main community drugs schemes which is circumvented by our alternative option-based policy. Our findings highlight the need for policymakers, even when absorbed with reducing cost, to design cost-containment policies that are both fiscally and economically sustainable. Copyright © 2012 International Society for Pharmacoeconomics and Outcomes Research (ISPOR). Published by Elsevier Inc. All rights reserved.

  1. Recent experiments with ECRH/ECCD in T-10

    International Nuclear Information System (INIS)

    Kislov, D.A.

    2001-01-01

    Experiments with ECRH performed during 1998-2000 are presented. An operating regime with an edge transport barrier, interpreted as the H-mode, has been studied with both on-axis and off-axis ECRH. Experimental data imply formation of an internal transport barrier simultaneously with the external transport barrier in the case of off-axis ECRH. Strong evolution of plasma potential in the regions of the external and internal transport barriers has been observed using Heavy Ion Beam Probe diagnostics. The mode of improved confinement with peaked density profiles and increased ion temperature has been observed after pellet injection into ECRH heated plasmas. Experimental study of q(r) profile control by ECCD has been performed. Instabilities, identified as the neoclassical tearing modes, have been found to limit beta in the regimes with a high fraction of bootstrap current. The dependence of the critical β on the q(r) profile has been observed. A systematic study of plasma turbulence has been started using Correlation Reflectometry diagnostics. (author)

  2. Canadian CANDU fuel development program and recent fuel operating experience

    International Nuclear Information System (INIS)

    Lau, J.H.K.; Inch, W.W.R.; Cox, D.S.; Steed, R.G.; Kohn, E.; Macici, N.N.

    1999-01-01

    This paper reviews the performance of the CANDU fuel in the Canadian CANDU reactors in 1997 and 1998. The operating experience demonstrates that the CANDU fuel has performed very well. Over the 2-year period, the fuel-bundle defect rate for all bundles irradiated in the Canadian CANDU reactors has remained very low, at between 0.006% to 0.016%. On a fuel element basis, this represents an element defect rate of less than about 0.0005%. One of the reasons for the good fuel performance is the support provided by the Canadian fuel research and development programs. These programs address operational issues and provide evolutionary improvements to the fuel products. The programs consist of the Fuel Technology Program, funded by the CANDU Owners Group, and the Advanced Fuel and Fuel Cycles Technology Program, funded by Atomic Energy of Canada Ltd. These 2 programs, which have been in place for many years, complement each other by sharing expert resources and experimental facilities. This paper describes the programs in 1999/2000, to provide an overview of the scope of the programs and the issues that these programs address. (author)

  3. Recent results of the NA48/2 experiment

    CERN Document Server

    Raggi, Mauro

    2009-01-01

    NA48/2 collected the wolrd largest sample of K± --+ 7r±7ro'Y decays. Direct Emission (DE) and Interference (INT) fractions with respect to the internal bremsstrahlung (IB) have been measured in the range 0 < T; < 80 MeV: FracnE(O < T; < 80 MeV) = (3.32 ± 0.15sta ± 0.14sys) X 10-2 Frac1NT(O < T; < 80 MeV) = -(2.35 ± 0.35sta ± 0.39sys) X 10-2 where T; is the kinetic energy of the charged pion in the kaon rest frame. A sample of 7253 K± --+ 7r±e+ e- decay candidates has been collected by the NA48/2 experiment. The branching ratio in the full kinematic range was measured to be BR = (3.11 ± 0.12) · 10-1. For both decays CP violating asymmetry has been studied.

  4. Recent results from the ATLAS experiment on the Higgs boson

    CERN Document Server

    van Vulpen, Ivo; The ATLAS collaboration

    2017-01-01

    Five years ago, particle physicists announced the discovery of the Higgs boson, the last missing ingredient in the Standard Model. Since then, the enormous wealth of data collected by the ATLAS experiment has allowed us to zoom in on the properties of this fundamental scalar that is linked to electroweak symmetry breaking, a fundamental ingredient in the model that describes the elementary particles. I will present the latest results on its properties like the mass, width, observation of different decay channels and coupling(structure) and discuss their implications in the context of the Standard Model. Because of the special role of the Higgs boson, the precision measurements can be used to look for physics beyond the Standard Model that are expected to show up at the TeV energies the LHC can probe, by looking for inconsistencies between the predicted and observed properties. I will discuss our strategy, the impact current limits have on these models and describe what new Higgs boson decay channels and prope...

  5. Recent results from the UA1 experiment at CERN

    International Nuclear Information System (INIS)

    Dobrzynski, L.

    1986-10-01

    Results based on a sample of events with large missing transverse energy corresponding to 715 nb -1 of data from the UA1 experiment at the CERN antipp Collider are presented. High transverse momentum tau-leptons from W decays are observed for the first time through their semi-hadronic decay modes. The first direct tests of the e-μ-τ universality of the weak charged couplings at Q 2 =m 2 W is provided. Measured W and Z 0 rates and heavy flavour cross sections are used to predict rates of missing transverse energy events from all known Standard Model processes, and thereby to place limits on possible new sources. After taking into account all known sources of missing energy events, we find a mass limit on a fourth generation charged lepton of m L > 41 GeV/c 2 and a limit on the number of additional neutrinos of N ν 2 for the gluino and 70 GeV/c 2 for the squark are also given. Finally, two events are presented in which two energetic hadronic jets and a high energy lepton are balanced by missing energy. These events are discussed and compared to all observed W + 2-jet events

  6. Retinoblastoma: a recent experience at the National University Hospital, Singapore.

    Science.gov (United States)

    Aung, LeLe; Chan, Yiong Huak; Yeoh, Eng Juh; Tan, Poh Lin; Quah, Thuan Chong

    2009-08-01

    Retinoblastoma is a very rare disease. There were 30 cases of retinoblastoma diagnosed and treated at National University Hospital (NUH). A retrospective chart review was performed on the medical records of 30 patients who were diagnosed with retinoblastoma between 1995 and 2008 at the Department of Paediatrics, National University Hospital, Singapore. The median age at diagnosis was 1.6 years (range, 0-5.9) with a median follow-up of 1.8 years (range, 0.1 to 11.6). The median time from presenting signs to the time of diagnosis was 5.2 months (range, 0-25.2). Common presenting signs of retinoblastoma were identified; the most common of which were leukocoria (50.0%), squinting (13.3%), poor vision (10.0%), strabismus (6.6%) and unknown (33.3%). Of the 30 patients, 10 were from Singapore whilst the other 20 patients were from the surrounding countries. Twelve patients had bilateral disease at the time of diagnosis, while 18 had unilateral disease. Staging information was available in 27 patients. Enucleation was performed in 25 of 30 patients. Radiation therapy was given in 3 patients in 1995 (bilateral disease), 2001 (bilateral disease) and 2003 (unilateral disease). At the time of analysis, 19 patients were alive with no evidence of disease. Overall 5-year survival for the cohort was 88.1% [95% confidence interval (CI), 88.0-100] and event-free survival for the whole cohort was 74.2% (95% CI, 55.8-92.6). In our limited experience, the importance of collaboration and standardisation of the staging system, raising awareness and education of primary healthcare providers and parents are strongly stressed.

  7. Recent results on charm from Fermilab experiment E-687

    International Nuclear Information System (INIS)

    Buchholz, D.; Gourlay, S.; Moroni, L.; Ratti, S.P.; Shephard, W.D.

    1990-12-01

    About 10 4 charm decays have been reconstructed from first-run data of Fermilab experiment E687 using the Fermilab Wide-Band Photon Spectrometer with the world's highest energy photon beam. The success of techniques for isolating and reconstructing charm event samples based on two complementary vertexing strategies is illustrated. Preliminary results are presented. These include lifetime value of (0.50 ± 0.06 ± 0.03)ps for the D s + , and (0.20 ± 0.03 ± 0.03)ps for the Λ c + . Preliminary values for the D + and D 0 lifetimes are consistent with currently accepted world averages. Signals for the Cabibbo-suppressed decays D 0 → π + π - π + π - , D + → K + K - π + , and D + → φπ + are shown; for B(D 0 → π + π - π + π - )/B(D 0 → K - π + π + π - ) our preliminary value is 0.10 ± 0.02 ± 0.02. Preliminary values for ratios B(D 0 → Kstring 0 K + K - )/B(D 0 → Kstring 0 π + π - ) and B(D 0 → Kstring 0 φ)/B(D 0 → Kstring 0 π + π - ) are 0.20 ± 0.06 and 0.16 ± 0.06. Preliminary results are given for cross sections of D* ± and D ± photoproduction on a Be target for the p 2 τ dependence of D minus-plus photoproduction and for the ratios D double-prime/D* + and D* - /D minus-plus . The energy dependence of the total open charm photoproduction cross section is compared with model predictions for photon energies up to 350 GeV. 18 refs., 5 figs

  8. Recent experience with large solar thermal systems in The Netherlands

    Energy Technology Data Exchange (ETDEWEB)

    Bokhoven, T.P.; Dam, J. Van; Kratz, P. [ZEN-International bv, Gouda (Netherlands)

    2001-07-01

    Since 1995, two large solar thermal systems (1200 and 2400 m{sup 2}) have been realised in The Netherlands for industrial purposes. It is expected that large solar systems will be used more often in the coming years. For that reason and for the benefit of successful solar projects, important practical experience with these large systems is reported. In 1995/1996, a system was constructed in Lisse for the purpose of agricultural drying and conditioning, consisting of a 1200-m{sup 2} (high performance) flat-plate collector array and a 1000-m{sup 3} water storage tank. The tank has been constructed as the foundation of a warehouse building and is situated below groundwater level. The combination of these two conditions, together with the other storage parameters, has given grounds for many extra design considerations compared to other underground storage units. Special details had to be designed, for these specific conditions, concerning leakages (in/out of the tank), anti-floating measures and underwater insulation which is stable at high temperatures. The lessons learned in this project can be of value for those considering the construction of this kind of underground storage unit. In 1996/1997, a 2400-m{sup 2} system was realised in Breda at a confectionery factory (van Melle), in which the drain-back concept was used on such a scale for the first time. The various design characteristics for drain-back systems, as were already known from two decades of usage in small domestic hot water systems, were upscaled to a 'super drain-back' system. The scale of the project further emphasised the advantages of this concept in cost (both operational and investment), performance and safety. However, the size of the system also brought some unexpected side effects which should be taken into account in future designs. (Author)

  9. FANP concept for plant life management and recent experience

    International Nuclear Information System (INIS)

    Nopper, H.; Daeuwel, W.; Waas, U.

    2002-01-01

    The deregulation of the power generation industry has resulted in increased competitive pressure and is forcing operators to improve plant operating economy while maintaining high levels of plant safety. A key factor to meet this challenge is to apply a comprehensive plant life management (PLIM) approach. The PLIM strategy addresses all relevant ageing and degradation mechanisms, the safety concept and the plant component documentation. In addition, it affects the management of plant personnel, consumables, operations management systems and administrative control procedures. Framatome ANP GmbH has developed an integrated PLIM concept and associated software tools applicable for both new and operating plants. The concept includes procedures and strategies regarding mechanical, electrical and I and C components as well as civil structures. The majority of e.g. mechanical components in a well-kept power plant will experience a technical service life, which is far above the intended design life. In most cases, only a small percentage of mechanical components is subject to significant degradation which may effect the integrity or the function of the component. The intention of an effective PLIM concept is to select safety and availability relevant components, were relevant degradation can not be ruled out. The PLIM concept utilizes a combination of strategies to identify components in a power plant: which are relevant to life management. An integrated safety review identifies components essential to safety, providing a classification of the associated safety levels. Assessment concerning the availability relevance of components is conduced. Components identified to be important to safety and availability are subject to a screening process for further grouping with respect to degradation potential. The selection process provides reasonable prioritisation of ageing relevant components and ensures that efforts are devoted to elements, where ageing is a relevant concern

  10. Hydrodynamics experiments with soap films and soap bubbles: A short review of recent experiments

    Science.gov (United States)

    Kellay, H.

    2017-11-01

    In this short review, I focus on recent experiments that benefit from the advantages offered by the two-dimensionality of the flow in suspended thin liquid films to reconsider hydrodynamics problems which have resisted a full understanding. The first problem discussed here concerns friction drag in channel flows. The use of turbulent channel flows, using thin liquid films, allows measurements of friction drag as well as mean velocity profiles for flows with different spectral exponents. Is there a link between the spectral properties of the turbulence and the mean velocity profiles or the frictional drag? This is the first question considered. The second issue examined considers the long time dynamics of large scale vortices. These are obtained in half bubbles rendered "turbulent" through thermal convection. These vortices, which live in a quasi two-dimensional environment, have a long time dynamics where their vorticity goes through what seems to be a well-defined cycle with generic features.

  11. Suicidal Ideation in Adolescence: Examining the Role of Recent Adverse Experiences

    Science.gov (United States)

    Thompson, Richard; Proctor, Laura J.; English, Diana J.; Dubowitz, Howard; Narasimhan, Subasri; Everson, Mark D.

    2012-01-01

    Although there is a well-known link between adverse experiences and suicidal ideation, there has been little study of the effects of recent adverse experiences on suicidal ideation in teenagers. This study examined the association between recent adverse experiences and suicidal ideation in a sample of 740 at-risk 16-year-old youth in the LONGSCAN…

  12. 78 FR 56822 - Certified Flight Instructor Flight Reviews; Recent Pilot in Command Experience; Airmen Online...

    Science.gov (United States)

    2013-09-16

    ...-0780; Amdt. No. 61-131] RIN 2120-AK23 Certified Flight Instructor Flight Reviews; Recent Pilot in Command Experience; Airmen Online Services AGENCY: Federal Aviation Administration (FAA), DOT. ACTION... review requirements. This rule also clarifies that the generally applicable recent flight experience...

  13. Review of recent benchmark experiments on integral test for high energy nuclear data evaluation

    Energy Technology Data Exchange (ETDEWEB)

    Nakashima, Hiroshi; Tanaka, Susumu; Konno, Chikara; Fukahori, Tokio; Hayashi, Katsumi [Japan Atomic Energy Research Inst., Tokai, Ibaraki (Japan). Tokai Research Establishment

    1998-11-01

    A survey work of recent benchmark experiments on an integral test for high energy nuclear data evaluation was carried out as one of the work of the Task Force on JENDL High Energy File Integral Evaluation (JHEFIE). In this paper the results are compiled and the status of recent benchmark experiments is described. (author)

  14. 14 CFR 135.97 - Aircraft and facilities for recent flight experience.

    Science.gov (United States)

    2010-01-01

    ... 14 Aeronautics and Space 3 2010-01-01 2010-01-01 false Aircraft and facilities for recent flight experience. 135.97 Section 135.97 Aeronautics and Space FEDERAL AVIATION ADMINISTRATION, DEPARTMENT OF... Flight Operations § 135.97 Aircraft and facilities for recent flight experience. Each certificate holder...

  15. 78 FR 66261 - Certified Flight Instructor Flight Reviews; Recent Pilot in Command Experience; Airmen Online...

    Science.gov (United States)

    2013-11-05

    ...-0780; Amdt. No. 61-131] RIN 2120-AK23 Certified Flight Instructor Flight Reviews; Recent Pilot in Command Experience; Airmen Online Services; Confirmation of Effective Date AGENCY: Federal Aviation...-calendar month flight review requirements. This rule also clarifies that the generally applicable recent...

  16. Recent laser experiments on the Aurora KrF/ICF laser system

    International Nuclear Information System (INIS)

    Turner, T.P.; Jones, J.E.; Czuchlewski, S.J.; Watt, R.G.; Thomas, S.J.; Kang, M.; Tallman, C.R.; Mack, J.M.; Figueira, J.F.

    1990-01-01

    The Aurora KrF/ICF Laser Facility at Los Alamos is operational at the kilojoule-level for both laser and target experiments. We report on recent laser experiments on the system and resulting system improvements. 3 refs., 4 figs

  17. Energy confinement scaling in tokamaks: some implications of recent experiments with ohmic and strong auxiliary heating

    International Nuclear Information System (INIS)

    Goldston, R.J.

    1984-02-01

    Recent results from confinement scaling experiments on tokamaks with ohmic and strong auxiliary heating are reviewed. An attempt is made to draw these results together into a low-density ohmic confinement scaling law, and a scaling law for confinement with auxiliary heating. The auxiliary heating confinement law may also serve to explain the saturation in tau/sub E/ vs anti n/sub e/ observed in some ohmic heating density scaling experiments

  18. Recent results on charge-parity symmetry violation at the Belle experiment

    International Nuclear Information System (INIS)

    Moloney, G.R.; Sevior, M.E.; Taylor, G.N.; Tovey, S.N.; Varvell, K.; Bakich, A.; Peak, L.

    2002-01-01

    Full text: The observation of large Charge-Parity, CP, symmetry violation in the decay of B mesons has recently been reported by the Belle collaboration. Belle is an international collaboration of 54 institutes from 13 countries. The Belle experiment studies the decay of B B meson pairs produced at the KEKB B factory in Tsukuba, Japan. This presentation will include a survey of recent measurements by Belle, including the latest measurement of the CP violation parameter, sin2φ 1 . The Australian contribution to the construction and maintenance of the Belle detector will also be presented - including the assembly of detector modules for the recent upgrade of the Belle Silicon Vertex Detector

  19. Medical genetics, public understanding and patient experiences: An exploratory qualitative study of recently pregnant women

    Science.gov (United States)

    Garman, Jamie L.

    The purpose of the study was to document how individuals' experiences and understanding of genetics concepts affects their medical experiences. Recently pregnant women were interviewed because they represent a population that needs to comprehend biological and genetic information to understand their health. Three women were designated as science experts (SE) defined as having extensive university level science education and three women were designated as science non-experts (SNE). In general, SEs described a more positive pregnancy experience. Both SEs and SNEs demonstrated a basic understanding of genetic concepts but varied in the application of concepts to personal medical issues. Participants' views and experiences of pre and postnatal tests were linked to their understanding of nature of science components such as recognition that tests have limitations. Results from this study indicate an incomplete understanding of the nature of science among participants may have led to unsatisfactory medical experiences.

  20. Relationship between Recent Flight Experience and Pilot Error General Aviation Accidents

    Science.gov (United States)

    Nilsson, Sarah J.

    Aviation insurance agents and fixed-base operation (FBO) owners use recent flight experience, as implied by the 90-day rule, to measure pilot proficiency in physical airplane skills, and to assess the likelihood of a pilot error accident. The generally accepted premise is that more experience in a recent timeframe predicts less of a propensity for an accident, all other factors excluded. Some of these aviation industry stakeholders measure pilot proficiency solely by using time flown within the past 90, 60, or even 30 days, not accounting for extensive research showing aeronautical decision-making and situational awareness training decrease the likelihood of a pilot error accident. In an effort to reduce the pilot error accident rate, the Federal Aviation Administration (FAA) has seen the need to shift pilot training emphasis from proficiency in physical airplane skills to aeronautical decision-making and situational awareness skills. However, current pilot training standards still focus more on the former than on the latter. The relationship between pilot error accidents and recent flight experience implied by the FAA's 90-day rule has not been rigorously assessed using empirical data. The intent of this research was to relate recent flight experience, in terms of time flown in the past 90 days, to pilot error accidents. A quantitative ex post facto approach, focusing on private pilots of single-engine general aviation (GA) fixed-wing aircraft, was used to analyze National Transportation Safety Board (NTSB) accident investigation archival data. The data were analyzed using t-tests and binary logistic regression. T-tests between the mean number of hours of recent flight experience of tricycle gear pilots involved in pilot error accidents (TPE) and non-pilot error accidents (TNPE), t(202) = -.200, p = .842, and conventional gear pilots involved in pilot error accidents (CPE) and non-pilot error accidents (CNPE), t(111) = -.271, p = .787, indicate there is no

  1. Space, the final frontier: A critical review of recent experiments performed in microgravity.

    Science.gov (United States)

    Vandenbrink, Joshua P; Kiss, John Z

    2016-02-01

    Space biology provides an opportunity to study plant physiology and development in a unique microgravity environment. Recent space studies with plants have provided interesting insights into plant biology, including discovering that plants can grow seed-to-seed in microgravity, as well as identifying novel responses to light. However, spaceflight experiments are not without their challenges, including limited space, limited access, and stressors such as lack of convection and cosmic radiation. Therefore, it is important to design experiments in a way to maximize the scientific return from research conducted on orbiting platforms such as the International Space Station. Here, we provide a critical review of recent spaceflight experiments and suggest ways in which future experiments can be designed to improve the value and applicability of the results generated. These potential improvements include: utilizing in-flight controls to delineate microgravity versus other spaceflight effects, increasing scientific return via next-generation sequencing technologies, and utilizing multiple genotypes to ensure results are not unique to one genetic background. Space experiments have given us new insights into plant biology. However, to move forward, special care should be given to maximize science return in understanding both microgravity itself as well as the combinatorial effects of living in space. Copyright © 2015. Published by Elsevier Ireland Ltd.

  2. Cosmic rays, aerosols, clouds, and climate: Recent findings from the CLOUD experiment

    Science.gov (United States)

    Pierce, J. R.

    2017-08-01

    The Cosmics Leaving OUtdoor Droplets (CLOUD) experiment was created to systematically test the link between galactic cosmic rays (GCR) and climate, specifically, the connection of ions from GCR to aerosol nucleation and cloud condensation nuclei (CCN), the particles on which cloud droplets form. The CLOUD experiment subsequently unlocked many of the mysteries of nucleation and growth in our atmosphere, and it has improved our understanding of human influences on climate. Their most recent publication (Gordon et al., 2017) provides their first estimate of the GCR-CCN connection, and they show that CCN respond too weakly to changes in GCR to yield a significant influence on clouds and climate.

  3. Recent results on weak decays of charmed mesons from the Mark III experiment

    International Nuclear Information System (INIS)

    Browder, T.E.

    1989-01-01

    Recent results from the Mark III experiment on weak decays of charmed mesons are presented. Measurements of the resonant substructure of D 0 → K - π + π - π + decays, the first model independent result on D s → φπ + , as well as limits on D s → ηπ + and D s → η'π + are described. The implications of these new results are also discussed. 37 refs., 7 figs., 4 tabs

  4. Low-energy photon scattering and photoactivation experiments: selected recent results from the Stuttgart Dynamitron facility

    CERN Document Server

    Kneiss, U

    2002-01-01

    Photon scattering off bound nuclear states (nuclear resonance fluorescence (NRF)) and photoactivation of long-lived isomers are complementary to one another and share the principal advantage of a well-known reaction mechanism. The experimental progress achieved during the last years allows nowadays experiments of tremendously increased sensitivity opening new fields of applications. In the present lecture recent results are summarized from experiments performed at the well-established Bremsstrahlung photon scattering and photoactivation facilities of the 4.3 MV Stuttgart Dynamitron accelerator. Three current topics are discussed in details: The systematics of E1 two-phonon excitations of the type (2 sup + x 3 sup -) in nuclei near shell closures; the first observation of a population inversion of nuclear states, the precondition for a possible gamma-laser, by feeding from higher-lying photo-excited states (NRF experiments on sup 1 sup 0 sup 3 Rh); and the photoactivation of long-lived isomers. Here first resu...

  5. Does operative experience during residency correlate with reported competency of recent general surgery graduates?

    Science.gov (United States)

    Safavi, Arash; Lai, Sarah; Butterworth, Sonia; Hameed, Morad; Schiller, Dan; Skarsgard, Erik

    2012-01-01

    Background Identification of attributes of residency training that predict competency would improve surgical education. We hypothesized that case experience during residency would correlate with self-reported competency of recent graduates. Methods Aggregate case log data of residents enrolled in 2 general surgery programs were collected over a 12-month period and stratified into Surgical Council on Resident Education (SCORE) categories. We surveyed recent (surgery (4, 0.04%), and the least common EU procedure was abdomen–spleen (1, 0.1%). The questionnaire response rate was 45%. For EC procedures, self-reported competency was highest in skin and soft tissue, thoracic and head and neck (each 100%) and lowest in vascular–venous (54%), whereas for EU procedures it was highest in abdomen–general (100%) and lowest in vascular–arterial (62%). The correlation between case volume and self-reported competency was poor (R = 0.2 for EC procedures). Conclusion Self-reported competency correlates poorly with operative case experience during residency. Other curriculum factors, including specific rotations and timing, balance between inpatient and outpatient surgical experience and competition for cases, may contribute to procedural competency acquisition during residency. PMID:22854144

  6. Survey of Equine Referring Veterinarians' Satisfaction with Their Most Recent Equine Referral Experience.

    Science.gov (United States)

    Best, C; Coe, J B; Hewson, J; Meehan, M; Kelton, D

    2018-02-22

    Little is known about the veterinary referral process and factors that contribute to positive outcomes. To investigate equine referring veterinarians' (rDVMs') satisfaction with their most recent referral experience and compare rDVM and specialist perspectives. 187 rDVMs and 92 specialists (referral care providers). Cross-sectional observational study. An online survey was administered to both rDVMs and specialists. Referring veterinarian satisfaction with their most recent referral experience was evaluated. Both rDVMs and specialists were asked to identify factors influencing a rDVM's decision where to refer, and the top 3 factors they perceive are barriers to referral care. Median rDVM satisfaction with their most recent referral care experience was 80 of 100 (mean, 75; range, 8-100). Referring veterinarians provided the lowest satisfaction score for the item asking about "The competition the referral hospital poses to your practice" (mean, 56.96; median, 62; range, 0-100). The top factor rDVMs identified as influencing their decision where to refer was "quality of care," whereas specialists identified "quality of communication and updates from the clinician." Referring veterinarians' top barrier to referral care was "high cost of referral care," and for specialists was "poor service provided to the client by the referral hospital." Referring veterinarians generally were satisfied with referral care, but areas exist where rDVMs and specialists differ in what they view as important to the referral process. Exploring opportunities to overcome these differences is likely to support high quality care. © 2018 The Authors. Journal of Veterinary Internal Medicine published by Wiley Periodicals, Inc. on behalf of the American College of Veterinary Internal Medicine.

  7. Survey of Equine Referring Veterinarians' Satisfaction with Their Most Recent Equine Referral Experience

    Science.gov (United States)

    Coe, J.B.; Hewson, J.; Meehan, M.; Kelton, D.

    2018-01-01

    Background Little is known about the veterinary referral process and factors that contribute to positive outcomes. Objective To investigate equine referring veterinarians' (rDVMs') satisfaction with their most recent referral experience and compare rDVM and specialist perspectives. Sample 187 rDVMs and 92 specialists (referral care providers). Methods Cross‐sectional observational study. An online survey was administered to both rDVMs and specialists. Referring veterinarian satisfaction with their most recent referral experience was evaluated. Both rDVMs and specialists were asked to identify factors influencing a rDVM's decision where to refer, and the top 3 factors they perceive are barriers to referral care. Results Median rDVM satisfaction with their most recent referral care experience was 80 of 100 (mean, 75; range, 8–100). Referring veterinarians provided the lowest satisfaction score for the item asking about “The competition the referral hospital poses to your practice” (mean, 56.96; median, 62; range, 0–100). The top factor rDVMs identified as influencing their decision where to refer was “quality of care,” whereas specialists identified “quality of communication and updates from the clinician.” Referring veterinarians' top barrier to referral care was “high cost of referral care,” and for specialists was “poor service provided to the client by the referral hospital.” Conclusions and Clinical Importance Referring veterinarians generally were satisfied with referral care, but areas exist where rDVMs and specialists differ in what they view as important to the referral process. Exploring opportunities to overcome these differences is likely to support high quality care. PMID:29469978

  8. Recent results on heavy flavor physics from LEP experiments using 1990-92 data

    Energy Technology Data Exchange (ETDEWEB)

    Gasparini, U. [Istituto di Fisica Sperimentale, Padova (Italy)

    1994-12-01

    After three years of data taking, the four LEP experiments collected a total of about four million Z{sup 0} hadronic decays, in which a heavy quark pair (either b{bar b} or c{bar c}) is produced with 40% probability. Results are presented both in the sector of the electroweak precision measurements, with particular emphasis on the beauty quark, and in the determination of the beauty decay properties, where lifetimes and branching ratio measurements take advantage of the large statistics now available and of the recent improvements in the analysis based on microvertex detectors and particle identification devices.

  9. Land use impacts of rapid transit: implications of recent experience. Final report

    Energy Technology Data Exchange (ETDEWEB)

    Knight, R.L.; Trygg, L.L.

    1977-08-01

    Evidence of land use impacts of recent major rapid transit improvements are reviewed and conclusions drawn concerning the extent and nature of such impacts and the conditions under which they have occurred. Transit improvements studied are primarily post-World War II in origin. American and Canadian examples are stressed, although European experience is teated briefly. Virtually all major modern American and Canadian rapid transit investments are included, covering conventional rapid rail, commuter rail, light rail and bus/busway. In addition to conclusions on general patterns of land use impact and causes, research recommendations and Federal policy implications are drawn.

  10. Recent results of the IGEX 76Ge double-beta decay experiment

    International Nuclear Information System (INIS)

    Aalseth, C.E.; Avignone, F.T. III; Brodzinski, R.L.; Hensley, W.K.; Miley, H.S.; Reeves, J.H.; Cebrian, S.; Gonzales, D.; Garcia, E.; Irastorza, I.G.; Morales, A.; Morales, J.; Ortiz de Solorzano, A.; Puimedon, J.; Sarsa, M.L.; Scopel, S.; Villar, J.A.; Kirpichnikov, I.V.; Starostin, A.S.; Vasenko, A.A.

    2000-01-01

    The International Germanium Experiment (IGEX) has now analyzed 117 mol yr of data from its isotopically enriched (86% 76 Ge) germanium detectors. Applying pulse shape discrimination (PSD) to the more recent data, the lower bound on the half-life for neutrinoless double-beta decay of 76 Ge is deduced: T 1sol2 (0ν) > 1.57 x 10 25 yr (90% C.L.). This corresponds to an upper bound on the Majorana neutrino mass parameter, ν >, between 0.33 eV and 1.35 eV depending on the choice of theoretical nuclear matrix elements used in the analysis

  11. Recent Progress on the magnetic turbulence experiment at the Bryn Mawr Plasma Laboratory

    Science.gov (United States)

    Schaffner, D. A.; Cartagena-Sanchez, C. A.; Johnson, H. K.; Fahim, L. E.; Fiedler-Kawaguchi, C.; Douglas-Mann, E.

    2017-10-01

    Recent progress is reported on the construction, implementation and testing of the magnetic turbulence experiment at the Bryn Mawr Plasma Laboratory (BMPL). The experiment at the BMPL consists of an ( 300 μs) long coaxial plasma gun discharge that injects magnetic helicity into a flux-conserving chamber in a process akin to sustained slow-formation of spheromaks. A 24cm by 2m cylindrical chamber has been constructed with a high density axial port array to enable detailed simultaneous spatial measurements of magnetic and plasma fluctuations. Careful positioning of the magnetic structure produced by the three separately pulsed coils (one internal, two external) are preformed to optimize for continuous injection of turbulent magnetized plasma. High frequency calibration of magnetic probes is also underway using a power amplifier.

  12. Experiences of migration and the determinants of obesity among recent Iranian immigrants in Victoria, Australia.

    Science.gov (United States)

    Delavari, Maryam; Farrelly, Ashley; Renzaho, Andre; Mellor, David; Swinburn, Boyd

    2013-01-01

    There is evidence to suggest that immigrant groups from low- or medium-human development index countries show a significant adoption of obesogenic behaviors and experience weight gain following migration to Australia. The objective of this study is to understand the changes that Iranian immigrants experience in relation to the determinants of obesity after migration to Victoria, Australia. We conducted five focus group discussions with 33 recent Iranian immigrants. This study took an interpretive qualitative approach to data analysis using the constant comparative method. Participants discussed individual level acculturation (e.g., in diet, body size, attitudes), as well as environmental level changes (e.g., physical/structural and sociocultural) that occurred after immigration. Stress during the initial immigration transition, which affected diet and physical activity habits, was a common experience among participants. Gender and the effect of political/religious changes were also important factors. Participants' discourse largely focused on their ability and willingness to adopt positive health behaviors after migration. This study provides insight into the effect of migration on the determinants of obesity among Iranian immigrants in Victoria, Australia, and offers a contrast with the existing evidence by considering the experience of a group that is generally well educated, often emigrates for reasons related to personal freedom as opposed to material deprivation, and has rates of obesity similar to high-income countries.

  13. Correlates of domestic violence experience among recently-married women residing in slums in Pune, India.

    Science.gov (United States)

    Kalokhe, Ameeta S; Iyer, Sandhya R; Kolhe, Ambika R; Dhayarkar, Sampada; Paranjape, Anuradha; Del Rio, Carlos; Stephenson, Rob; Sahay, Seema

    2018-01-01

    The high risk of experiencing domestic violence (DV) among married women in India who reside in slum communities underscores the need for effective, evidence-based, and culturally-tailored primary prevention. To inform such DV primary prevention strategies for this population, we herein aimed to identify correlates of DV experience in early marriage. Utilizing a cross-sectional design, potential correlates of DV experience were explored among a geographically-clustered random sample of 100 recently-married women residing in slums in Pune, India. In multivariable regression, DV experience was associated with less educational attainment by the participant's spouse (standardized β = -0.281, p = 0.004), less satisfaction of the spouse's family with the maanpaan (wedding-related gifts provided by the bride's family) they received at the time of marriage (standardized β = -0.298, p<0.001), poorer conflict negotiation skills (standardized β = -0.308, p<0.001), and greater acknowledgement of DV occurrence in family and friends (standardized β = 0.436, p<0.001). These correlates suggest strategies that could be incorporated into future DV primary prevention interventions for this vulnerable population (i.e. promoting completion of formal education of boys alongside girls, mitigating causes of familial dowry harassment, improving conflict negotiation skills, and challenging norms surrounding DV).

  14. Recent performance experience with US light water reactor self-actuating safety and relief valves

    Energy Technology Data Exchange (ETDEWEB)

    Hammer, C.G.

    1996-12-01

    Over the past several years, there have been a number of operating reactor events involving performance of primary and secondary safety and relief valves in U.S. Light Water Reactors. There are several different types of safety and relief valves installed for overpressure protection of various safety systems throughout a typical nuclear power plant. The following discussion is limited to those valves in the reactor coolant systems (RCS) and main steam systems of pressurized water reactors (PWR) and in the RCS of boiling water reactors (BWR), all of which are self-actuating having a setpoint controlled by a spring-loaded disk acting against system fluid pressure. The following discussion relates some of the significant recent experience involving operating reactor events or various testing data. Some of the more unusual and interesting operating events or test data involving some of these designs are included, in addition to some involving a number of similar events and those which have generic applicability.

  15. Amelioration of erectile dysfunction following a switch from carbamazepine to oxcarbazepine: recent clinical experience.

    Science.gov (United States)

    Sachdeo, Rajesh; Sathyan, Revathi R

    2005-07-01

    Oxcarbazepine is an antiepileptic drug (AED) indicated for use as monotherapy and add-on therapy in adults and children 4 years of age and older. Despite being structurally related to carbamazepine, oxcarbazepine differs substantially in its pharmacokinetic and safety profile; oxcarbazepine has a much lower risk of pharmacokinetic drug-drug interactions than carbamazepine. Carbamazepine has also been shown to induce the hepatic synthesis of sex hormone-binding globulin, thus reducing free serum testosterone levels and possibly causing erectile dysfunction (ED) in some men; these effects have not been observed with oxcarbazepine. This paper provides a discussion of recent clinical experience with men who presented in private clinical practice with complaints of ED while being treated with carbamazepine for seizure disorders. The four illustrative case studies presented in this report suggest that switching AED treatment from carbamazepine to oxcarbazepine in men with epilepsy can reduce the ED side effects observed with carbamazepine.

  16. NDT with the structural weld overlay program. Recent field experience and lessons learned

    International Nuclear Information System (INIS)

    Rishel, R.; Lenz, H.; Turley, G.; Newton, B.

    2007-01-01

    Structural weld overlay (SWOL) has become a predominant mitigation technique within the Alloy 600 program. For the pressurizer nozzles, MRP-139 requires volumetric examination by year end 2007. Many nozzles are un-inspectable due to geometry and material limitations that preclude interrogation of the required examination volume. SWOL therefore is the mitigation technique which overcomes these limitations. SWOL of the pressurizer nozzles has been a challenge for all the vendors. Alloy 52 has proven to be difficult to weld under field conditions. The NDT technique chosen to demonstrate the integrity of the overlay needs to be adapted to the specific repair process and nozzle geometry. The purpose of this paper will be to present Westinghouse's integrated approach for SWOL with the focus on the NDT aspects. Topics will include main repair process steps, NDT qualification, recent field experience and lessons learned. (author)

  17. Recent Operating Experience involving Power Electronics Failure in Korea Nuclear Power Plants

    International Nuclear Information System (INIS)

    Lee, Jaedo

    2015-01-01

    Recently, modern power electronics devices for electrical component were steadily increased in electrical systems which used for main power control and protection. To upgrade the system reliability we recommended the redundancy for electrical equipment trip system. The past several years, Korean Nuclear power plants have changed the electrical control and protection systems (Auto Voltage Regulator, Power Protection Relay) for main generator and main power protection relay systems. In this paper we deal with operating experience involving modern solid state power electronics failure in Korean nuclear power plants. One of the failures we will discuss the degraded phenomenon of power electronics device for CEDMCS(Control Element Drive Mechanism Control System). As the result of the failure we concerned about the modification for trip source of main generator excitation systems and others. We present an interesting issue for modern solid state devices (IGBT, Thyristors). (authors)

  18. Experiences of primary care professionals providing healthcare to recently arrived migrants: a qualitative study.

    Science.gov (United States)

    Lindenmeyer, Antje; Redwood, Sabi; Griffith, Laura; Teladia, Zaheera; Phillimore, Jenny

    2016-09-22

    The main objectives of the study were to explore the experiences of primary care professionals providing care to recent migrants in a superdiverse city and to elicit barriers and facilitators to meeting migrants' care needs. This paper focuses on a strong emergent theme: participants' descriptions and understandings of creating a fit between patients and practices. An exploratory, qualitative study based on the thematic analysis of semistructured interviews. A purposive sample of 10 practices. We interviewed 6 general practitioners, 5 nurses and 6 administrative staff; those based at the same practice opted to be interviewed together. 10 interviewees were from an ethnic minority background; some discussed their own experiences of migration. Creating a fit between patients and practice was complex and could be problematic. Some participants defined this in a positive way (reaching out, creating rapport) while others also focused on ways in which patients did not fit in, for example, different expectations or lack of medical records. A small but vocal minority put the responsibility to fit in on to migrant patients. Some participants believed that practice staff and patients sharing a language could contribute to achieving a fit but others outlined the disadvantages of over-reliance on language concordance. A clearly articulated, team-based strategy to create bridges between practice and patients was often seen as preferable. Although participants agreed that a fit between patients and practice was desirable, some aimed to adapt to the needs of recently arrived migrants, while others thought that it was the responsibility of migrants to adapt to practice needs; a few viewed migrant patients as a burden to the system. Practices wishing to improve fit might consider developing strategies such as introducing link workers and other 'bridging' people; however, they could also aim to foster a general stance of openness to diversity. Published by the BMJ Publishing Group

  19. Employment for radiation oncologists in Australia and New Zealand: Recent graduates survey of experiences and perspectives.

    Science.gov (United States)

    Leung, John; Kariyasawam, Sanjeewanie; Forstner, Dion; Chee, Raphael; James, Melissa

    2018-02-01

    This paper reports the key findings of the first survey of recent Radiation Oncology graduates in Australia, New Zealand (ANZ) and Singapore. It explores their experiences in entering the workforce, challenges and perspectives. The survey was conducted in April and May 2016 focusing on graduates from 2013 to 2015. The questions related to relocation, current employment, experiences in finding a job, intentions regarding rural work, job satisfaction and perceptions of the job market. The response rate was 80% (66/83). Most respondents (72.7%) commenced and completed their training in the same location. The large majority of respondents (91%) were employed with 51% as consultants, 20% as fellows and 15% as locums. Sixty-four percent of respondents spent more than twelve weeks looking for a consultant position, but this was expected by 80% of respondents. Seventy-three percent of respondents spent more than four weeks looking for a fellowship position, but this was expected by 90%. Twenty seven percent of respondents lived and worked in a rural area with nearly half of respondents who did not work in a rural area, indicating they would consider so if certain conditions were met. The large majority (75%) were satisfied with their current employment with only seven percent reporting dissatisfaction. Respondents felt that the job market was very competitive because of the large number of trainees and better workforce planning was required to ensure a reasonable balance between workforce supply and demand. Some career guidance and mentorship for readiness for the job market was thought to be beneficial. This initial survey of recent Radiation Oncology graduates in ANZ and Singapore has revealed the large majority are employed as consultants or fellows, although there is apprehension about a competitive job market. The survey should be repeated on a regular basis to monitor future trends. © 2017 The Royal Australian and New Zealand College of Radiologists.

  20. The RISCOM Model in practice - recent experiences from new areas of application

    Energy Technology Data Exchange (ETDEWEB)

    Andersson, Kjell [Karita Research AB, Taeby (Sweden); Wene, Clas-Otto [Wenergy, Lund (Sweden)

    2006-09-15

    The RISCOM project started with a pilot study in 1997, funded by the Swedish Nuclear Power Inspectorate (SKI) and the Swedish Radiation Protection Institute (SSI). The RISCOM Model was further developed, tested and used as part of the European RISCOM II project. The RISCOM Model has emerged as a result of efforts in the area of nuclear waste management to make decision processes for e.g. the selection of sites for final disposal transparent. This is also the area where the model was first applied when hearings were designed for the Swedish site selection process. In recent years the RISCOM Model has been used to analyze the prerequisites for transparency in several areas, and the Transparency Forum idea has been applied in practical situations, most notably for risk assessment of mobile telephone systems and cleaning-up and remediation of contaminated sites. In this paper we summarize recent experiences in applying the RISCOM model in different policy making areas, comment on some aspects where the model offers unique possibilities and emphasize some crucial issues with regard to future applications.

  1. The RISCOM Model in practice - recent experiences from new areas of application

    International Nuclear Information System (INIS)

    Andersson, Kjell; Wene, Clas-Otto

    2006-01-01

    The RISCOM project started with a pilot study in 1997, funded by the Swedish Nuclear Power Inspectorate (SKI) and the Swedish Radiation Protection Institute (SSI). The RISCOM Model was further developed, tested and used as part of the European RISCOM II project. The RISCOM Model has emerged as a result of efforts in the area of nuclear waste management to make decision processes for e.g. the selection of sites for final disposal transparent. This is also the area where the model was first applied when hearings were designed for the Swedish site selection process. In recent years the RISCOM Model has been used to analyze the prerequisites for transparency in several areas, and the Transparency Forum idea has been applied in practical situations, most notably for risk assessment of mobile telephone systems and cleaning-up and remediation of contaminated sites. In this paper we summarize recent experiences in applying the RISCOM model in different policy making areas, comment on some aspects where the model offers unique possibilities and emphasize some crucial issues with regard to future applications

  2. Strangers in a strange land: health care experiences for recent Latino immigrants in Midwest communities.

    Science.gov (United States)

    Harari, Nurit; Davis, Matthew; Heisler, Michele

    2008-11-01

    Latino immigrants in recent years are moving to U.S. communities that have little experience with immigration from Latin America. Although public health initiatives have been created to expand health care services to uninsured adults and children, little is known about whether and to what extent new immigrants benefit from such resources. We conducted 50 in-depth, semi-structured interviews with recent Latino immigrants residing in the Ann Arbor/Ypsilanti area of southeast Michigan to explore (a) these immigrants' perceptions of access to public health resources; (b) their assessments of their own health status, social and health needs, and patterns of use of health care services; (c) barriers to health care utilization; (d) strategies they have adopted to approach these barriers; and (e) how best to address the needs of growing immigrant communities. Latino immigrants often are not using and are unaware of local public health programs and other health resources. The principal barriers to care noted included lack of insurance, language barriers, and isolation in new communities. Many strategies, both effective and ineffective, have been adopted to overcome these barriers. With the dynamic flux of new immigrants into many communities, outreach efforts must be continuously renewed and re-oriented to reach new arrivals.

  3. Special relativity and superluminal motions: a discussion of some recent experiments

    Energy Technology Data Exchange (ETDEWEB)

    Recami, E. [Istituto Nazionale di Fisica Nucleare, Milan (Italy)]|[Bergamo Univ., Bergamo (Italy). Fac. di Ingegneria]|[State Univ. of Campinas, Campinas (Brazil); Fontana, F. [Pirelli Cavi, Milan (Italy). R and D sector; Garavaglia, R. [Milan Univ., Milan (Italy). Dipt. di Scienze dell' Informazione

    2000-03-01

    Some experiments, performed at Berkeley, Cologne, Florence, Vienna, Orsay and Rennes led to the claim that something seems to travel with a group velocity larger than the speed c of light in vacuum. Various other experimental results seem to point in the same direction. For instance, localized wavelet-type solutions of Maxwell equations have been found, both theoretically and experimentally, that travel with superluminal speed. Even mounic and electronic neutrinos - it has been proposed - might be tachyons, since their square mass appears to be negative. With regard to the first mentioned experiments, it was very recently claimed by Guenter Nimtz that those results with evanescent waves or tunnelling photons - implying superluminal signal and impulse transmission - violate Einstein causality. This note, on the contrary, discusses that all such results do not place relativistic causality in jeopardy, even if they refer to actual tachyonic motions. In fact, special relativity can cope even with also the known paradoxes , devised for faster than light motion, even if this is not widely recognized. Here the paper shows, in detail and rigorously, how to solve the oldest casual paradox. originally proposed by Tolman, which is the kernel of many further tachyon paradoxes. The key to the solution is a careful application of tachyon mechanics, as it unambiguously follows from special relativity.

  4. Test Capabilities and Recent Experiences in the NASA Langley 8-Foot High Temperature Tunnel

    Science.gov (United States)

    Hodge, Jeffrey S.; Harvin, Stephen F.

    2000-01-01

    The NASA Langley 8-Foot High Temperature Tunnel is a combustion-heated hypersonic blowdown-to-atmosphere wind tunnel that provides flight enthalpy simulation for Mach numbers of 4, 5, and 7 through an altitude range from 50,000 to 120,000 feet. The open-.jet test section is 8-ft. in diameter and 12-ft. long. The test section will accommodate large air-breathing hypersonic propulsion systems as well as structural and thermal protection system components. Stable wind tunnel test conditions can be provided for 60 seconds. Additional test capabilities are provided by a radiant heater system used to simulate ascent or entry heating profiles. The test medium is the combustion products of air and methane that are burned in a pressurized combustion chamber. Oxygen is added to the test medium for air-breathing propulsion tests so that the test gas contains 21 percent molar oxygen. The facility was modified extensively in the late 1980's to provide airbreathing propulsion testing capability. In this paper, a brief history and general description of the facility are presented along with a discussion of the types of supported testing. Recently completed tests are discussed to explain the capabilities this facility provides and to demonstrate the experience of the staff.

  5. Distributed Solar Incentive Programs: Recent Experience and Best Practices for Design and Implementation

    Energy Technology Data Exchange (ETDEWEB)

    Bird, L.; Reger, A.; Heeter, J.

    2012-12-01

    Based on lessons from recent program experience, this report explores best practices for designing and implementing incentives for small and mid-sized residential and commercial distributed solar energy projects. The findings of this paper are relevant to both new incentive programs as well as those undergoing modifications. The report covers factors to consider in setting and modifying incentive levels over time, differentiating incentives to encourage various market segments, administrative issues such as providing equitable access to incentives and customer protection. It also explores how incentive programs can be designed to respond to changing market conditions while attempting to provide a longer-term and stable environment for the solar industry. The findings are based on interviews with program administrators, regulators, and industry representatives as well as data from numerous incentive programs nationally, particularly the largest and longest-running programs. These best practices consider the perspectives of various stakeholders and the broad objectives of reducing solar costs, encouraging long-term market viability, minimizing ratepayer costs, and protecting consumers.

  6. High density LHCD experiments and recent progress on HT-7 superconducting tokamak

    International Nuclear Information System (INIS)

    2000-01-01

    The quasi-steady state (τ H > 10 τ Eoh ) H-mode was obtained with very high plasma density by Lower Hybrid Current Drive (LHCD). The line average density during improved confinement phase is about 4.5∼6.0x10 13 cm -3 which is very close to the Greenwald density limit (78 ∼ 96% of Greenwald density limit). The τ E is about 1.5 ∼ 2.0 times than the L-mode scaling during H-phase. The experimental results show a good agreement with code simulation for the LH off-axis power deposition profile with a reproducible manner. These off-axis hollow current profiles and enhanced confinement improvements are attributed to a strong reduction of electron thermal diffusivity in the reversed shear region. Steady state full LH wave current drive has been achieved. The pulse length is 3.5 seconds, which reaches the present limit of PF system. The good plasma condition is obtained by ICRF boronization, which makes Z eff close to 1.0. High density shots are obtained by two different fueling methods: multi pellet injection and supersonic beam injection. The later shows a high fueling efficiency that could be used for steady-state operation and the plasma density exceeds the Greenwald density limit. ICRH preionization, start-up, heating and its synergy with LHCD have been tested during recent experiments and some interesting results have been obtained. (author)

  7. Recent experimental progress in the TMX-U thermal barrier tandem mirror experiment

    International Nuclear Information System (INIS)

    Turner, W.C.; Allen, S.L.; Casper, T.A.

    1984-01-01

    Recent experiments on the TMX-U thermal barrier device at LLNL have achieved the end plugging of axial ion losses up to a central cell density of n/sub c/ = 2 x 10 12 cm. During these tests, the axial potential profile characteristic of a thermal barrier has been measured experimentally, indicating an ion-confining potential greater than 1.5 kV and a potential depression of 0.45 kV in the barrier region. The average beta of hot electrons in the thermal barrier has been increased to 15% and appears limited only by classical scattering and ECRH pulse duration. Furthermore, deuterium ions in the central cell have been heated with ICRF to an average energy of 1.5 keV, with a heating efficiency of 40%. During strong end plugging, the axial ion confinement time reached 50 to 100 ms while the nonambipolar radial ion confinement time was 5 to 15 ms - independent of end plugging. Radial ion confinement time exceeding 100 ms has been attained on shots without end plugging. Plates, floated electrically on the end walls, have increased the radial ion confinement time by a factor of 1.8. Further improvement in the central cell density during end plugging can be expected by increasing the ICRF, improving the central cell vacuum conditions and beam heating efficiency, and increasing the radial extent of the potential control plates on the end walls

  8. Recent experience with onshore oil and gas operations in the Mackenzie Delta, NWT

    International Nuclear Information System (INIS)

    Burns, J.

    1999-01-01

    Hydrocarbon deposits in the Beaufort Sea and Mackenzie Delta indicate mean discovered gas reserves of 5 trillion cubic feet of natural gas, 67 million barrels of condensate, and 247 million barrels of oil in fields located onshore. There may be even bigger undiscovered reserves that could be proven by a surge in drilling likely to occur in this region within the next few years. There are a number of characteristics of this area that appeal to the oil and gas industry over and above the discovered and undiscovered reserves. There is a local aboriginal group with a settled land claim, clear and reasonable rules for access, a business-like approach to development and a sophisicated understanding of the oil and gas industry. There is reasonable access by road, commercial air service, rail and barge by Hay river or sea with an excellent harbour at Tuktoyaktuk. Local contractors and labour with applicable skills and good equipment are available. The Inuvialuit Petroleum Corp. and its partners Altagas Services Inc. and Enbridge Inc. completed a project to supply the town of Inuvik with natural gas for electricity generation and local distribution. This project is a small example of the physical, economic and regulatory environments that the oil industry will face with the undertaking of larger projects. Aspects of the region described include: the Inuvialuit, recent experience, logistics, regulatory environment, project approvels, environmental, and specific observations

  9. Outcomes and Prognostic Variables in Adenoid Cystic Carcinoma of the Head and Neck: A Recent Experience

    International Nuclear Information System (INIS)

    Gomez, Daniel R.; Hoppe, Bradford S.; Wolden, Suzanne L.; Zhung, Joanne E.; Patel, Snehal G.; Kraus, Dennis H.; Shah, Jatin P.; Ghossein, Ronald A.; Lee, Nancy Y.

    2008-01-01

    Purpose: To analyze the recent experience of patients with adenoid cystic carcinoma treated with radiation therapy at Memorial Sloan-Kettering Cancer Center. Methods and Materials: From 1990 to 2004, a total of 59 patients with a diagnosis of primary adenoid cystic carcinoma of the head and neck received radiation therapy at our institution. The subsite distribution was oral cavity, 28% (n = 17); paranasal sinuses, 22% (n = 13); parotid, 14% (n = 8); submandibular, 14% (n = 8); oropharynx, 10% (n = 6); sublingual, 3% (n = 2); nasopharynx, 3% (n = 2); and other, 5% (n = 3). T Stage distribution was T1, 34% (n = 20); T2, 19% (n = 11); T3, 14% (n = 8); and T4, 34% (n = 20). Twenty-nine percent of patients (n = 17) were treated with intensity-modulated radiation therapy; 25% (n =15), with three-dimensional conformal therapy, and the remainder, with conventional techniques. Ninety percent (n = 53) of patients received treatment including the base of skull. Results: Median follow-up for surviving patients was 5.9 years. Five-year and 10-year rates of local control and distant metastases-free survival were 91%/81% and 81%/49%, respectively. Five-year and 10-year rates of disease-free and overall survival were 76%/40% and 87%/65%, respectively. On univariate analysis, stage T4 (p = 0.004) and gross/clinical nerve involvement (p = 0.002) were associated with decreased progression free survival, whereas stage T4 and lymph node involvement were associated with decreased overall survival (p = 0.046 and p < 0.001, respectively). Conclusions: Radiation therapy in combination with surgery produces excellent rates of local control, although distant metastases account for a high proportion of failures. Routine treatment to the base of skull reduces the significance of histologic perineural invasion, but major nerve involvement remains an adverse prognostic factor

  10. Recent results on Pb+Pb collisions at 158 AGeV from the WA98 experiment at CERN

    NARCIS (Netherlands)

    Wyslouch, B

    1998-01-01

    We present recent results obtained with the WA98 experiment at CERN SPS. The experiment consists of large acceptance hadron and photon spectrometers which allow to study many aspects of heavy ion collisions. We use event-by-event measurements of charged and neutral particle multiplicity to establish

  11. Linguistic Resource Creation for Research and Technology Development: A Recent Experiment

    National Research Council Canada - National Science Library

    Strassel, Stephanie; Maxwell, Mike; Cieri, Christopher

    2003-01-01

    .... Experiments in porting technologies to handle new natural languages have revealed a great potential for multilingual computing, but also a frustrating lack of linguistic resources for most languages...

  12. Plans and Recent Developments for Fluid Physics Experiments Aboard the ISS

    Science.gov (United States)

    McQuillen, John B.; Motil, Brian J.

    2016-01-01

    From the very first days of human spaceflight, NASA has been conducting experiments in space to understand the effect of weightlessness on physical and chemically reacting systems. NASA Glenn Research Center (GRC) in Cleveland, Ohio has been at the forefront of this research looking at both fundamental studies in microgravity as well as experiments targeted at reducing the risks to long duration human missions to the moon, Mars, and beyond. In the current International Space Station (ISS) era, we now have an orbiting laboratory that provides the highly desired condition of long-duration microgravity. This allows continuous and interactive research similar to Earth-based laboratories. Because of these capabilities, the ISS is an indispensable laboratory for low gravity research. NASA GRC has been actively involved in developing and operating facilities and experiments on the ISS since the beginning of a permanent human presence on November 2, 2000. As the lead Center for Fluid Physics, NASA GRC is developing and testing the Pack Bed Reactor Experiment (PBRE), Zero Boil Off (ZBOT) Two Phase Flow Separator Experiment (TPFSE), Multiphase Flow Heat Transfer (MFHT) Experiment and the Electro-HydroDynamic (EHD) experiment. An overview each experiment, including its objectives, concept and status will be presented. In addition, data will be made available after a nominal period to NASAs Physical Science Informatics PSI database to the scientific community to enable additional analyses of results.

  13. On-line experiments with high-energy protons: recent results and possible future directions

    International Nuclear Information System (INIS)

    Hansen, P.G.

    1980-01-01

    Following a brief overview of the research programme at ISOLDE, a few new results are discussed in detail. These include the first observation of a new radioactive decay mode: Beta-delayed two-neutron emission from 11 Li. Non-nuclear experiments are believed to be of increasing importance; as an example of these a series of experiments on shifts in the energies of K X-rays are reviewed. (Auth.)

  14. An Evaluation of Recent Pick-up Point Experiments in European Cities: the Rise of two Competing Models?

    OpenAIRE

    AUGEREAU, V; DABLANC, L

    2007-01-01

    In this paper, we present an analysis of recent collection point/lockerbank experiments in Europe, including the history of some of the most notable experiments. Two 'models' are currently quite successful (Kiala relay points in France and Packstation locker banks in Germany), although they are quite different. As a first interpretation of these results, we propose that these two models be considered as complementary to one another.

  15. IMPULSE Highlights for recent experiments at the Advanced Photon Source (2/9-2/18 2014)

    Energy Technology Data Exchange (ETDEWEB)

    Jensen, Brian J. [Los Alamos National Lab. (LANL), Los Alamos, NM (United States)

    2014-03-18

    This report is a presentation, with slides noting, Over 40 experiments were completed during this run using X-ray imaging on the IMPULSE system at Sector 32 IDB; Summary of new experiments: Idealized sphere compaction – Capture progression of dynamic densification through an idealized system on 0.500 mm borosilicate glass spheres (Slide 1); Detonator and EBW Imaging Experiments on IMPULSE – First time HE was intentionally detonated at APS (Slide 2); Spall and high strain rate crack nucleation/propagation in PMMA – PCI data is providing new and unique insights for model validation (Slide 3); Fiber composite for armor applications was studied under ballistic impact of Dyneema (Collaboration with Army Research Laboratory) (Slide 4). Summary of on-going experiments; Crack propagation in vitreous carbon – observed crack motion and caustic; Jet formation experiments on large grain cerium to examine phase dependent strength; Ballistic impact of Comp-B and TNT to examine thermo-mechanical response in-situ with various penetrator geometries to vary shear concentration. Other efforts: IMPULSE system moved and installed in Sector 35 (DCS). This includes the 4-frame X-ray detection system, 4- channel PDV, and other gun diagnostics; New remotely operated mobile IMPULSE structure in fabrication – to be delivered to APS in April; 4 Mini-VISAR Systems and 4-channel PDV installed in DCS instrumentation room with all associated diagnostics.

  16. Recent H majority inverted radio frequency heating scheme experiments in JET-ILW

    DEFF Research Database (Denmark)

    Van Eester, Dirk; Lerche, Ernesto; Kazakov, Yevgen

    2017-01-01

    Inverted 3He and D ion cyclotron minority heating scenarios were recently tested in JET-ILW. They confirm the good heating efficiency at low concentrations of ~3%. The 3He minority heating scheme is only modestly affected by the change from a carbon (JET-C) to a Beryllium (JET-ILW) wall but unlike...

  17. Overview of recent AWE fusion-related studies, experiments and facilities

    Directory of Open Access Journals (Sweden)

    Roberts P.D.

    2013-11-01

    Full Text Available The presentation will describe the current status of modelling short and long pulse laser irradiation and its application to inertial fusion designs. Recent results will be described which give confidence in the modelling in specific regimes. An update will be given of the AWE ORION laser facility and the availability planned for academic access.

  18. The use of radioisotopes in human experiments: comments in response to recent media articles

    International Nuclear Information System (INIS)

    Boyd, R.E.

    1994-04-01

    Recent newspaper articles question the propriety and ethical foundation of early experimental programs in which radioisotopes were administered to human subjects. This paper describes the relevant activities of ANSTO's predecessor, the Australian Atomic Energy Commission, and provides an historical background to these and subsequent events

  19. Learning Informally to Use Teaching Games for Understanding: The Experiences of a Recently Qualified Teacher

    Science.gov (United States)

    O'Leary, Nick

    2014-01-01

    This article reports on a study of one recently qualified teacher's employment of the Teaching Games for Understanding (TGfU) model in a UK secondary school. The study sought to examine how the teacher, not formally educated in its use, delivered TGfU and to identify those factors that led to this interpretation of the model. Occupational…

  20. Sex and Relationships Education and Gender Equality: Recent Experiences from Andalusia (Spain)

    Science.gov (United States)

    Venegas, Mar

    2013-01-01

    Despite recent advances in sex and relationships education (SRE), the Spanish education system still lacks coherent policies in this field. This paper provides an overview of the current situation, focusing specifically on Andalusia, and discusses the importance of providing SRE for young people. It first describes current Spanish education policy…

  1. Adaptation of multiwire chambers to some recent experiments in elementary particle physics

    International Nuclear Information System (INIS)

    Comby, G.

    1977-01-01

    Three realizations of gas multiplication detectors are presented in the field of multiwire chambers. Le 'NEUTRINO' experiment is intended for investigating neutrino interactions at energies as high as possible with using drift chambers. The 'LEZARD' experiment is intended for investigating lepton and hadron production at high transverse momentum in hadron-nucleon collisions up to the higher energies attainable at SPS (use of a multiwire proportional chamber), the apparatus has the performance of a spectrometer. A spark chamber equipped with memories has been developed for controlling bubble chamber experiments. Emphasis is put on the evolution towards detectors associated with 'another thing' to obtain a more specific operation: such as the plasma memory and spark chamber association, some possible association with function gaps is pointed out (delay function, homothetic function) [fr

  2. The data exchange between LEP machine and its experiments - Recent developments

    International Nuclear Information System (INIS)

    Brummer, P.J.

    1994-01-01

    This paper describes the present data communications system between the LEP machine and the LEP experiments. The system should adapt easily to changes of experiments as well as to new acquisition methods and changes of the machine. During 1991 and 1992, software quality and response times were improved. In order to cope with increasing data rates a new computer system has been installed. The need for continuing operation while the software was being modified imposed a phased approach to the changeover. Some alternative methods of communication with experimental groups are discussed and compared with the one presented here. In future, fast data bases will play an increasingly important role in this activity. ((orig.))

  3. Toward Full Participation in Management Consulting Practice: Experiences of Recent College Graduates

    Science.gov (United States)

    Chao, Chia-an

    2005-01-01

    Purpose - This study seeks to understand the college-to-work transition process from the perspectives of a group of new management consultants. Design/methodology/approach - This study focuses on the experience of a group of management consultants, how they construct meaning in their work, and the workplace itself. Participants in this study…

  4. What Does an Inventory of Recent Innovation Experiences Tell Us about Agricultural Innovation in Africa?

    Science.gov (United States)

    Triomphe, Bernard; Floquet, Anne; Kamau, Geoffrey; Letty, Brigid; Vodouhe, Simplice Davo; Ng'ang'a, Teresiah; Stevens, Joe; van den Berg, Jolanda; Selemna, Nour; Bridier, Bernard; Crane, Todd; Almekinders, Cornelia; Waters-Bayer, Ann; Hocde, Henri

    2013-01-01

    Purpose: Within the context of the European-funded JOLISAA project (JOint Learning in and about Innovation Systems in African Agriculture), an inventory of agricultural innovation experiences was made in Benin, Kenya and South Africa. The objective was to assess multi-stakeholder agricultural innovation processes involving smallholders. Approach:…

  5. Recent research on stishovite: Hugoniot and partial release Z experiments and DFT EOS calculations

    Science.gov (United States)

    Furnish, Michael; Shulenburger, Luke; Desjarlais, Michael; Fei, Yingwei

    2017-06-01

    We have conducted a series of ride-along experiments on the Z facility to ascertain the Hugoniot of silica centered in the stishovite phase over a range 0.4 - 1.0 TPa, together with partial release states produced at the interface between the sample and a fused silica window. The stishovite samples were synthesized in a large-volume multi-anvil press at 15 GPa and 1773 K, with an initial density of 4.29 gm/cc. The new Z experiments on stishovite fill in a gap between gas gun experiments and NIF experiments. The states are compared with the Hugoniots of quartz and fused silica for inferences as to EOS. They are generally consistent with Sesame 7360 predictions. Sound speed constraints from these data are discussed. The new Hugoniot data cross over the melting curve of stishovite, providing insight into the properties of solid and liquid under extreme conditions in conjunction with predictions from density-functional theory modeling. These data are fundamentally important for understanding the interior of silicate-based super-Earths. Sandia National Labs is a multi-program laboratory managed and operated by Sandia Corporation, a wholly owned subsidiary of Lockheed Martin Corp., for the U.S. Dept. of Energy's National Nuclear Security Administration under contract DE-AC04-94AL85000.

  6. Recent research on stishovite: Hugoniot and partial release Z experiments and DFT EOS calculations.

    Energy Technology Data Exchange (ETDEWEB)

    Furnish, Michael D.; Shulenburger, Luke; Desjarlais, Michael; Fei, Yingwei

    2018-04-01

    We have conducted a series of ride-along experiments on the Z facility to ascertain the Hugoniot of silica centered in the stishovite phase over a range 0.4 - 1.0 TPa, together with partial release states produced at the interface between the sample and a fused silica window. The stishovite samples were synthesized in a large-volume multi-anvil press at 15 GPa and 1773 K, with an initial density of 4.29 gm/cc. The new Z experiments on stishovite fill in a gap between gas gun experiments and NIF experiments. The states are compared with the Hugoniots of quartz and fused silica for inferences as to EOS. They are generally consistent with Sesame 7360 predictions. Sound speed constraints from these data are discussed. The new Hugoniot data cross over the melting curve of stishovite; together with the partial-release data and predictions from density-functional theory modeling, they provide insights into the properties of solid and liquid under extreme conditions. These data are fundamentally important for understanding the interior of silicate-based super-Earths.

  7. Recent updates on the Standard Model Higgs boson measurements from the ATLAS and CMS experiments

    CERN Document Server

    Wang, Song-Ming

    2017-01-01

    This report presents the latest results from the ATLAS and CMS experiments on the measurements of the Standard Model Higgs boson by using the proton-proton collisions produced by the Large Hadron Collider during the first two years of Run 2 data taking.

  8. Reconstruction of showers at TeV energy by the CLUE Experiment and its application to recent data

    International Nuclear Information System (INIS)

    Bartoli, B.; Cresti, M.; Mariotti, M.; Peruzzo, L.; Sacco, R.; Saggion, A.; Sartori, G.; Sbarra, C.; Bigongiari, C.; Cocca, E.; Lucchesi, D.; Marsella, G.; Menzione, A.; Paoletti, R.; Parlavecchio, G.; Scribano, A.; Stamerra, A.; Turini, N.; Zetti, F.; Liello, F.

    1999-01-01

    The CLUE UV Cerenkov telescope array has started to take data with 8 telescopes in January 1998. The UV Cerenkov images obtained by the CLUE experiment are very different with respect to the visible case, and a new method for reconstructing the shower direction has been worked out. The shower reconstruction is shown and an application to recent data is given

  9. Reconstruction of showers at TeV energy by the CLUE Experiment and its application to recent data

    Energy Technology Data Exchange (ETDEWEB)

    Bartoli, B.; Cresti, M.; Mariotti, M.; Peruzzo, L.; Sacco, R.; Saggion, A.; Sartori, G.; Sbarra, C.; Bigongiari, C.; Cocca, E.; Lucchesi, D.; Marsella, G.; Menzione, A.; Paoletti, R.; Parlavecchio, G.; Scribano, A.; Stamerra, A.; Turini, N.; Zetti, F.; Liello, F

    1999-03-01

    The CLUE UV Cerenkov telescope array has started to take data with 8 telescopes in January 1998. The UV Cerenkov images obtained by the CLUE experiment are very different with respect to the visible case, and a new method for reconstructing the shower direction has been worked out. The shower reconstruction is shown and an application to recent data is given.

  10. Recent progress of fast-ion loss detector project in Asian fusion experiments

    International Nuclear Information System (INIS)

    Isobe, Mitsutaka; Zhang Yipo; Kim, Jun-Young

    2013-01-01

    The A3 foresight program is accelerating close collaboration for fast-ion diagnostics development between Asian three countries. A recent big step in our activities is that the operation of fast-ion loss detector (FILD) on HL-2A has begun lately. The localized bright spot appeared on the scintillator screen while a high-energy neutral beam was tangentially co-injected. The design of FILD system on EAST is steadily ongoing. The diagnostics port available for our purpose was decided in March, 2013. For KSTAR, the FILD is working successfully. In order to understand observed beam-ion loss signals while the RMP coils are turned on, the LORBIT code has been improved recently to treat non-axisymmetric perturbed field due to RMP coils and discreteness of TF coils. (author)

  11. Recent Results of ICC Experiment Simulations by the PSI-Center

    Science.gov (United States)

    Nelson, B. A.; Glasser, A. H.; Jarboe, T. R.; Kim, C. C.; Marklin, G. J.; Lowrie, W.; Meier, E. T.; Milroy, R. D.; Shumlak, U.; Sovinec, C. R.; O'Bryan, J. B.; Held, E.; Ji, J.-Y.; Lukin, V. S.

    2010-11-01

    The Plasma Science and Innovation Center (PSI-Center - http://www.psicenter.org) performs simulations of collaborating Innovative Confinement Concept (ICC) experiments. Collaborators include the Bellan Plasma Group (Caltech), CTH (Auburn U), FRX-L (Los Alamos National Laboratory), HIT-SI (U Wash - UW), LDX (M.I.T.), MST & Pegasus (U Wisc-Madison), PHD (UW), PFRC (PPPL), SSX (Swarthmore College), TCS (UW), and ZaP (UW). Modifications have been made to the NIMROD, HiFi, and PSI-Tet codes to specifically model these ICC experiments, including mesh generation/refinement, appropriate boundary conditions (external fields, insulating BCs, etc.), and kinetic and neutral particle interactions. Output files from these codes are interfaced to the powerful 3-D visualization program, VisIt (http://www.llnl.gov/visit). Results from these simulations, as well as an overview of the Interfacing Group status will be presented.

  12. Recent Precision Experiments with Exotic Nuclei Produced with Uranium Projectiles and Experimental Prospects at Fair

    Directory of Open Access Journals (Sweden)

    Geissel H.

    2014-03-01

    Full Text Available Precision experiments with relativistic fragments separated in-flight require special experimentalmethods to overcome the inherent large emittance from the creation in nuclear reactions and atomic interactions in matter. At GSI relativistic exotic nuclei have been produced via uranium projectile fragmentation and fission and investigated with the inflight separator FRS directly, or in combination with either the storage-cooler ring ESR or the FRS Ion Catcher. 1000 A·MeV 238U ions were used to create 60 new neutron-rich isotopes separated and identified with the FRS to measure their production cross sections. In another experimental campaign the fragments were separated in flight and injected into the storage-cooler ring ESR for accurate mass and lifetime measurements. In these experimentswe have obtained accurate new mass values analyzed via a novel method which has reduced the systematic errors for both Schottky Mass Spectrometry (SMS and for Isochronous Mass Spectrometry (IMS. Pioneering experiments have been carried out with the FRS Ion Catcher consisting of three experimental components, the dispersive magnetic system of the FRS with a monoenergetic and a homogeneous degrader, a cryogenic stopping cell filled with pure helium and a multiple-reflection time-of flight mass separator. The FRS Ion Catcher enables high precision spectroscopy experiments with eV to keV exotic nuclides. Results from these different FRS experiments are presented in this overview together with prospects for the next-generation facility Super-FRS. The novel features of the Super-FRS compared with the present FRS will be discussed in addition.

  13. Recent H majority inverted radio frequency heating scheme experiments in JET-ILW

    Directory of Open Access Journals (Sweden)

    Van Eester Dirk

    2017-01-01

    Full Text Available Inverted 3He and D ion cyclotron minority heating scenarios were recently tested in JET-ILW. They confirm the good heating efficiency at low concentrations of ∼3%. The 3He minority heating scheme is only modestly affected by the change from a carbon (JET-C to a Beryllium (JET-ILW wall but unlike what was the case in JET-C, the intrinsic Be ions D-like particles in terms of charge-over-mass ratio do not prevent the D (or 4He minority regime from being exploited. Direct and indirect evidence of the existence of fast particle subpopulations was found in both cases.

  14. Training experience and views of recently appointed consultants in geriatric medicine.

    Science.gov (United States)

    Sandler, M

    1992-01-01

    A postal survey of 71 recently appointed consultant geriatricians was undertaken in spring 1991. Several respondents were concerned about the adequacy of training in domiciliary visiting and continuing care, and about the time allocated for research and study. A high proportion felt they had been poorly prepared for the administrative and organisational components of their consultant post, and 75% of respondents advocated training in managerial skills for senior registrars. These findings are relevant to the planning of future training for senior registrars in geriatric medicine.

  15. Short-crested waves in deep water: a numerical investigation of recent laboratory experiments

    DEFF Research Database (Denmark)

    Fuhrman, David R.; Madsen, Per A.

    2006-01-01

    A numerical study of quasi-steady, doubly-periodic monochromatic short-crested wave patterns in deep water is conducted using a high-order Boussinesq-type model. Simulations using linear wavemaker conditions in the nonlinear model are initially used to approximate conditions from recent laboratory...... inclusion of steady third-order components in the wave generation is shown to significantly reduce the modulations (and other unsteady features), further confirming the explanation. This numerical work makes apparent some previously unknown difficulties associated with the physical generation of even...

  16. Feedback from recent operating experience in nuclear power plants regarding fire safety

    Energy Technology Data Exchange (ETDEWEB)

    Forell, Burkhard [Gesellschaft fuer Anlagen- und Reaktorsicherheit (GRS) gGmbH, Koeln (Germany)

    2015-12-15

    The paper provides insights from the operating experience in German nuclear power plants with reportable fire safety related events. The three reportable events outlined in more detail resulted in German Information Notices prepared by GRS and distributed on behalf of the Federal German regulatory body. The events concerned deficiencies at pipe penetration seals, which were not filled with mineral wool. Also at fire doors deficiencies of the insulation inside the door wings occurred. One event concerned a smouldering fire of rubber material in a waste drum which was placed in a plant internal drying facility for radioactive waste.

  17. Recent Spin Pump Experiments on Superfluid 3He-A1

    Science.gov (United States)

    Yamaguchi, A.; Kamada, N.; Motoyama, G.; Sumiyama, A.; Aoki, Y.; Okuda, Y.; Kubota, M.; Kojima, H.

    2013-05-01

    The superfluid 3He A1 phase, containing a spin-polarized condensate allows us to explore the dynamics of superfluid spin current. In the mechano-spin effect (MSE), a mechanically applied pressure gradient and a superleak-spin filter enable one to directly boost spin polarization of 3He in a small chamber. We are developing new apparatus for achieving greater enhancement of spin density. A development of a new-type 3He-hydraulic actuator has been already reported. We present here the construction of new-type of superleak-spin-filter made of packed powder aluminum oxide (referred as PAP-SL). The PAP-SL is popular in the study of superfluid 4He, but has not been established for that of the superfluid 3He. The attempt to construct the PAP-SL for the spin pump experiment was made by using aluminum oxide powder with nominal 1 μm powder diameter and with packing fraction of 40 %. Before executing the experiment, the nuclear demagnetization cryostat of ISSP, Univ. Tokyo which has been used for this experimental activity, was heavily damaged by the 2011 Great East Japan (Higashi Nihon) Earthquake. The repair work and earthquake damage protection strengthening has just been accomplished.

  18. Recent experience and future evolution of the CMS High Level Trigger System

    CERN Document Server

    Bauer, Gerry; Branson, James; Bukowiec, Sebastian Czeslaw; Chaze, Olivier; Cittolin, Sergio; Coarasa Perez, Jose Antonio; Deldicque, Christian; Dobson, Marc; Dupont, Aymeric; Erhan, Samim; Gigi, Dominique; Glege, Frank; Gomez-Reino Garrido, Robert; Hartl, Christian; Holzner, Andre Georg; Masetti, Lorenzo; Meijers, Franciscus; Meschi, Emilio; Mommsen, Remigius; Nunez Barranco Fernandez, Carlos; O'Dell, Vivian; Orsini, Luciano; Paus, Christoph Maria Ernst; Petrucci, Andrea; Pieri, Marco; Polese, Giovanni; Racz, Attila; Raginel, Olivier; Sakulin, Hannes; Sani, Matteo; Schwick, Christoph; Spataru, Andrei Cristian; Stoeckli, Fabian; Sumorok, Konstanty

    2012-01-01

    The CMS experiment at the LHC uses a two-stage trigger system, with events flowing from the first level trigger at a rate of 100 kHz. These events are read out by the Data Acquisition system (DAQ), assembled in memory in a farm of computers, and finally fed into the high-level trigger (HLT) software running on the farm. The HLT software selects interesting events for offline storage and analysis at a rate of a few hundred Hz. The HLT algorithms consist of sequences of offline-style reconstruction and filtering modules, executed on a farm of 0(10000) CPU cores built from commodity hardware. Experience from the 2010-2011 collider run is detailed, as well as the current architecture of the CMS HLT, and its integration with the CMS reconstruction framework and CMS DAQ. The short- and medium-term evolution of the HLT software infrastructure is discussed, with future improvements aimed at supporting extensions of the HLT computing power, and addressing remaining performance and maintenance issues.

  19. Recent experience with testing of parallel disc gate valves under accident flow conditions

    International Nuclear Information System (INIS)

    LaPointe, P.A.; Clayton, J.K.

    1992-01-01

    This paper presents the nuclear valve industry's latest and most extensive valve qualification test program experience. The test program includes a variety of 25 different gate and globe valves. All the test valves are power operated using either air, electric, or gas/hydraulic operators. The valves are categorized in size and pressure class so as to form a group of appropriate parent valve assemblies. Parent valve assembly qualification is used as the basis for qualification of candidate valve assemblies. The parent and candidate valve assemblies are representative of a nuclear plant's safety-related valve applications. The test program was performed in accordance with ANSI B16.41-1983 'Functional Qualification Requirements for Power Operated Active Valve Assemblies for Nuclear Power Plants.' The focus of this paper is on functional valve qualification test experience and specifically flow interruption testing to Annex G of the aforementioned test standard. Results of the flow test are summarized, including the coefficient of friction for each of the gate type valves reported. Information on valve size, pressure class, and actuator are given for all valves in the program. Although all valves performed extremely well, only selected test data are presented. The effects of the speed of operation and the effects of different fluid flow rates as they relate to the coefficient of friction between the valve disc and seat are discussed. The variation in the coefficient of friction based on other variables in the thrust equation, namely, differential pressure area is cited

  20. Understanding the burnout experience: recent research and its implications for psychiatry.

    Science.gov (United States)

    Maslach, Christina; Leiter, Michael P

    2016-06-01

    The experience of burnout has been the focus of much research during the past few decades. Measures have been developed, as have various theoretical models, and research studies from many countries have contributed to a better understanding of the causes and consequences of this occupationally-specific dysphoria. The majority of this work has focused on human service occupations, and particularly health care. Research on the burnout experience for psychiatrists mirrors much of the broader literature, in terms of both sources and outcomes of burnout. But it has also identified some of the unique stressors that mental health professionals face when they are dealing with especially difficult or violent clients. Current issues of particular relevance for psychiatry include the links between burnout and mental illness, the attempts to redefine burnout as simply exhaustion, and the relative dearth of evaluative research on potential interventions to treat and/or prevent burnout. Given that the treatment goal for burnout is usually to enable people to return to their job, and to be successful in their work, psychiatry could make an important contribution by identifying the treatment strategies that would be most effective in achieving that goal. © 2016 World Psychiatric Association.

  1. Understanding the burnout experience: recent research and its implications for psychiatry

    Science.gov (United States)

    Maslach, Christina; Leiter, Michael P.

    2016-01-01

    The experience of burnout has been the focus of much research during the past few decades. Measures have been developed, as have various theoretical models, and research studies from many countries have contributed to a better understanding of the causes and consequences of this occupationally‐specific dysphoria. The majority of this work has focused on human service occupations, and particularly health care. Research on the burnout experience for psychiatrists mirrors much of the broader literature, in terms of both sources and outcomes of burnout. But it has also identified some of the unique stressors that mental health professionals face when they are dealing with especially difficult or violent clients. Current issues of particular relevance for psychiatry include the links between burnout and mental illness, the attempts to redefine burnout as simply exhaustion, and the relative dearth of evaluative research on potential interventions to treat and/or prevent burnout. Given that the treatment goal for burnout is usually to enable people to return to their job, and to be successful in their work, psychiatry could make an important contribution by identifying the treatment strategies that would be most effective in achieving that goal. PMID:27265691

  2. [Autism and social support in recently immigrated families : experience of parents from Maghreb].

    Science.gov (United States)

    Ben-Cheikh, Imen; Rousseau, Cécile

    2013-01-01

    This qualitative exploratory study examines the impact of an autism diagnosis on the social support networks of North African's parents recently immigrated to Quebec and having a child diagnosed with pervasive developmental disorder. Semi-structured interviews were conducted with ten parents and participant observation took place during support meetings for the mothers. Our results highlight how the autism diagnosis transforms the parents' family and community networks, creating tensions and losses while also generating new links, sources of support. Group meetings between mothers of the same community experiencing the same problem are perceived particularly beneficial. The analysis of the relationship between professional service providers and families underlines how the development of a therapeutic alliance is threatened by major problems caused by administrative obstacles and intercultural communication difficulties. A greater awareness by health and social professionals of the interaction between the migratory context and the social network challenges associated with autism diagnostic for immigrant families would help ease these parents' loneliness and suffering.

  3. Recent results from the UA5 experiment at the CERN panti p collider

    International Nuclear Information System (INIS)

    Boeckmann, K.

    1983-11-01

    Recent data on the multiplicity distribution of charged particles produced in non-diffractive panti p collision at √s = 540 GeV are presented. A definite change of the normalized multiplicity distribution is observed when compared to lower energy data up to 62 GeV. A significant violation of KNO scaling is also clearly evidenced by the moments of the multiplicity distribution. The analysis of short range two particle correlations gives results for the mean cluster decay multiplicity consistent with previous results from a study of long range forward-backward correlations. The mean cluster is compatible with decaying into 1.5 resonances or directly produced stable particles which contribute in average 1.4 charged secondaries. (orig.)

  4. The weight of the visual world is modified by recent experience

    DEFF Research Database (Denmark)

    Ásgeirsson, Árni Gunnar; Kyllingsbæk, Søren; Kristjánsson, Árni

    . Recent proposals assume that repetition priming operates at multiple levels. Here we focus on two questions: (1) does repetition priming have a purely perceptual component? and (2) how does such a component fit into the TVA framework? (Bundesen, C. 1990. Psychological bulletin and Review, 97, 523......-547) In this study we briefly (20-110 ms.) presented subjects with a circular array of 6 digits, one of which was a color singleton target (1T5D partial report), whole report trials (6T) where subjects reported as many uniformly colored digits as possible and single target presentation (1T0D). Non-speeded accuracy...... tasks were chosen to isolate the perceptual component in repetition priming from response related biases and motor components. Color and position repetition benefits were evident at very brief exposures. The results support the hypothesis that repetition priming occurs for feature processing, while...

  5. Recent developments in the area of SoftQCD and Diffractive Physics at the ATLAS Experiment

    CERN Document Server

    Astalos, Robert; The ATLAS collaboration

    2018-01-01

    The ATLAS Collaboration released several new measurements in the area of SoftQCD and diffractive physics, ranging from the exclusive production of dimuons, over the total pp cross section measurement to studies of correlated hadron production. An overview of these most recent developments will be given in this talk: The total inelastic proton-proton cross section and the diffractive part of the inelastic cross section has been measured at 8 and 13 TeV in special data sets taken with low beam currents and using forward scintillators. More precise measurements of the total pp cross section and the elastic and inelastic contributions have been extracted from measurements of the differential elastic cross section using the optical theorem. In the absence of forward proton tagging, exclusive processes can be distinguished in the central part of the ATLAS detector exploiting the large rapidity gap in the central region and the absence of charged particles reconstructed in the inner tracking detector. This strategy ...

  6. Recent ARPES experiments on quasi-1D bulk materials and artificial structures.

    Science.gov (United States)

    Grioni, M; Pons, S; Frantzeskakis, E

    2009-01-14

    The spectroscopy of quasi-one-dimensional (1D) systems has been a subject of strong interest since the first experimental observations of unusual line shapes in the early 1990s. Angle-resolved photoemission (ARPES) measurements performed with increasing accuracy have greatly broadened our knowledge of the properties of bulk 1D materials and, more recently, of artificial 1D structures. They have yielded a direct view of 1D bands, of open Fermi surfaces, and of characteristic instabilities. They have also provided unique microscopic evidence for the non-conventional, non-Fermi-liquid, behavior predicted by theory, and for strong and singular interactions. Here we briefly review some of the remarkable experimental results obtained in the last decade.

  7. Decommissioning Small Research and Training Reactors; Experience on Three Recent University Projects - 12455

    Energy Technology Data Exchange (ETDEWEB)

    Gilmore, Thomas [LVI Services Inc. (United States); DeWitt, Corey; Miller, Dustin; Colborn, Kurt [Enercon Services, Inc. (United States)

    2012-07-01

    Decommissioning small reactors within the confines of an active University environment presents unique challenges. These range from the radiological protection of the nearby University population and grounds, to the logistical challenges of working in limited space without benefit of the established controlled, protected, and vital areas common to commercial facilities. These challenges, and others, are discussed in brief project histories of three recent (calendar year 2011) decommissioning activities at three University training and research reactors. These facilities include three separate Universities in three states. The work at each of the facilities addresses multiple phases of the decommissioning process, from initial characterization and pre-decommissioning waste removal, to core component removal and safe storage, through to complete structural dismantlement and site release. The results of the efforts at each University are presented, along with the challenges that were either anticipated or discovered during the decommissioning efforts, and results and lessons learned from each of the projects. (authors)

  8. Operational experience and recent developments at the National Medical Cyclotron, Sydney

    International Nuclear Information System (INIS)

    Conard, E.M.; Arnott, D.W.

    1996-01-01

    The National Medical Cyclotron, Sydney, Australia commenced operation in mid 1991, with a mission to provide PET and SPECT radionuclides throughout Australia. The realization of the present production capacity has been synonymous with the development of the facility's industrial cyclotron (IBA Cyclone 30). The choice of cyclotron was based on the Cyclone 30's virtues as a compact, user-friendly, energy efficient cyclotron, offering the beam quality characteristic of negative ion technology. Development of the cyclotron has improved reliability and increased beam capacity, while improvements to targetry have increased production reliability. More recently, the installation and commissioning of a new solid target irradiation facility has provided much needed redundancy. This paper describes the major cyclotron and targetry developments carried out to date. (orig.)

  9. Neutrino Physics without Neutrinos: Recent results from the NEMO-3 experiment and plans for SuperNEMO

    CERN Multimedia

    CERN. Geneva

    2015-01-01

    The observation of neutrino oscillations has proved that neutrinos have mass. This discovery has renewed and strengthened the interest in neutrinoless double beta decay experiments which provide the only practical way to determine whether neutrinos are Majorana or Dirac particles. The recently completed NEMO-3 experiment, located in the Laboratoire Souterrain de Modane in the Frejus Tunnel, was an experiment searching for neutrinoless double beta decays using a powerful technique for detecting a two-electron final state by employing an apparatus combining tracking, calorimetry, and the time-of-flight measurements. We will present latest results from NEMO-3 and will discuss the status of SuperNEMO, the next generation experiment that will exploit the same experimental technique to extend the sensitivity of the current search.

  10. Feeling lonely in the lab: A literature review and partial examination of recent loneliness induction procedures for experiments

    Directory of Open Access Journals (Sweden)

    Pels Fabian

    2017-01-01

    Full Text Available Few laboratory experiments have been conducted in loneliness research in the past. Therefore, the purpose of this article is to review, partially investigate and discuss loneliness induction procedures in order to facilitate future laboratory experiments in loneliness research (e.g. to examine the link between loneliness and social cognition. Previous studies have found both unconscious (i.e. professional hypnosis and conscious (i.e. recalling and calling out lonely experiences procedures to be successful in inducing loneliness. Another conscious procedure (i.e. recalling and writing down lonely experiences that has been described in recent literature has not yet been examined. Therefore, the present study aimed to examine this procedure using a one-group before-after design. However, this procedure, in which the participants had to recall and write down two lonely situations, was not found to significantly induce loneliness. Of 16 participants, only three reported at least some higher feelings of loneliness following this procedure.

  11. Recent regulatory experience of low-Btu coal gasification. Volume III. Supporting case studies

    Energy Technology Data Exchange (ETDEWEB)

    Ackerman, E.; Hart, D.; Lethi, M.; Park, W.; Rifkin, S.

    1980-02-01

    The MITRE Corporation conducted a five-month study for the Office of Resource Applications in the Department of Energy on the regulatory requirements of low-Btu coal gasification. During this study, MITRE interviewed representatives of five current low-Btu coal gasification projects and regulatory agencies in five states. From these interviews, MITRE has sought the experience of current low-Btu coal gasification users in order to recommend actions to improve the regulatory process. This report is the third of three volumes. It contains the results of interviews conducted for each of the case studies. Volume 1 of the report contains the analysis of the case studies and recommendations to potential industrial users of low-Btu coal gasification. Volume 2 contains recommendations to regulatory agencies.

  12. Advanced diagnostics for laser plasma interaction studies and some recent experiments

    International Nuclear Information System (INIS)

    Chaurasia, S.; Munda, D.S.; Dhareshwar, L.J.

    2008-10-01

    The complete characterization of Laser plasma interaction studies related to inertial confinement fusion laser and Equation of state (EOS) studies needs many diagnostics to explain the several physical phenomena occurring simultaneously in the laser produced plasma. This involves many on ion emission are important to understand physical phenomena which are responsible for generation of laser plasma as well as its interaction with an intense laser. In this report we describe the development of various x-ray diagnostics which are used in determining temporal, spatial and spectral properties of x-rays radiated from laser produced plasma. Diagnostics which have been used in experiments for investigation of laser-produced plasma as a source of ions are also described. Techniques using an optical streak camera and VISAR which are being used in the Equation of States (EOS) studies of various materials, which are important for material science, astrophysics as well as ICF is described in details. (author)

  13. A decade of experiments and recent upgrading at the AMS facility in Bucharest

    Energy Technology Data Exchange (ETDEWEB)

    Stan-Sion, C., E-mail: stansion@nipne.r [Department for Applied Physics, National Institute for Physics and Nuclear Engineering, Str. Atomistilor 407, Magurele, Bucharest 77125 (Romania); Enachescu, M.; Constantinescu, O.; Dogaru, M. [Department for Applied Physics, National Institute for Physics and Nuclear Engineering, Str. Atomistilor 407, Magurele, Bucharest 77125 (Romania)

    2010-04-15

    The Bucharest AMS facility has been in operation since 1998. We shortly present the performed experiments, the major upgrade of the AMS facility at NIPNE - Bucharest and the ongoing progress resulting since. We mounted a new ion source, of NEC 40 sample MC-SNCIS type and we reinforced the vacuum on the injector deck. Computer control on all parameters of the injector deck was implemented through a build-in-house electronic set-up. By converting the Tandem accelerator from a belt-driven charging system to a Pelletron and by introducing a modern GVM we have obtained a reduction of the fluctuations of the terminal voltage by at least two orders of magnitude.

  14. Recent management experience of UK performance assessments of radioactive waste disposal

    International Nuclear Information System (INIS)

    Thompson, B.G.J.; Wakerley, M.W.; Sumerling, T.J.

    1993-01-01

    The approach to management used over the past decade by a UK Government regulatory body (HMIP) to develop, test and apply integrated risk assessment methods, using a team of private contractors, is described. Two assessment projects using different contractual arrangements are compared and the significant issues arising from this experience are discussed both from the viewpoint of the client and of the main contractors. These issues include: - the client research management environment and use of computer-based information management systems; - estimating and controlling resources and timescales; - multi-disciplinary team working, communication and conflict resolution; - accomodating new information and computational tools during an assessment; - alternative documentation structures for reporting an assessment; - confidence, quality assurance (QA) and peer review

  15. Recent experiences in the development of locally-produced ready to use foods

    International Nuclear Information System (INIS)

    Ryan, Kelsey; Manary, Mark

    2014-01-01

    Ready-to-use foods for treatment of moderate acute malnutrition (MAM) are micronutrient-fortified, lipid pastes containing roasted peanuts, oil, micronutrients, sugar, soy and/or dairy ingredient powders. The benefits of pastes like ready-to-use therapeutic food (RUTF), ready-to-use supplementary food (RUSF), and lipid nutrient supplements (LNS) for the treatment of nutritional maladies are that they are shelf-stable due to their low water activity, they are easily transportable, and they can be eaten as-is. Since the development of ready-to-use foods, cost reduction and local production experimentation have been ongoing. Attempts to replace ingredients like skim milk powder with alternate dairy protein ingredients or non-animal ingredients have been reported, but little food and process development information has been revealed. Linear programming or least-cost optimization mathematical models have been employed to help design low cost paste formulas from a selection of ingredients that also meet nutritional requirements. A new user-friendly tool can be used to develop new formulas that incorporate locally-sourced ingredients. New approaches to ingredient utilization are necessary for future ready-to-use food production and will require the development of novel processes for local ingredients compared to traditional pastes. The challenges of incorporating novel ingredients include processing changes, flavor and acceptability, and meeting nutrient requirements. Our research is designed to not only look at substitute ingredients, but also to optimize processing conditions in order to reduce cost by energy savings, extended shelf-life, and lower nutrient degradation. An RUSF using a novel dairy ingredient, whey permeate, was recently developed and is currently being tested in a prospective, double-blind randomized clinical trial for children with MAM in Malawi. Recent research in the development and testing of ready-to-use foods for MAM include a programmatic study

  16. Radioactive material releases in the nuclear fuel cycle - Recent experience and improvements

    International Nuclear Information System (INIS)

    Allan, C.J.; Allsop, P.J.; Anderson, R.W.; Boss, C.R.; Frost, S.E.

    1997-01-01

    The nuclear fuel cycle involves a wide range of activities and technologies from the mining of uranium, to the production of electricity and radioisotopes for medical and industrial applications, to the reprocessing and recycling of used fuel, to decommissioning and waste disposal. Worker exposures and releases to the environment are carefully controlled in: (a) all stages of uranium mining, refining and fuel fabrication, where occupational exposures and releases have decreased while production has increased; (b) the operation of nuclear power plants, where occupational exposures and releases have decreased as reactor vendors evolve their products and reactor operators optimize their procedures; (c) fuel reprocessing facilities in the U.K. and France, where occupational exposures and releases have decreased while the amount of fuel processed has increased; and in (d) decommissioning nuclear facilities and waste management activities. The nuclear industry's recent record of achievement in controlling its releases and ensuring the radiological protection of its employees has been excellent. It is clear that releases and occupational exposures from modem nuclear facilities of all types contribute negligibly to the radiation environment to which all biota are exposed. But the general public seems not to appreciate the low environmental impact of nuclear activities. The future of nuclear power and of other applications of nuclear technology applications in medicine, in agriculture and in industry will depend on maintaining a high standard of performance so that the public and decision makers can be assured that the industry is safe. (author)

  17. Recent ion cyclotron range of frequencies experiments in JT-60U

    International Nuclear Information System (INIS)

    Kimura, H.; Fujii, T.; Saigusa, M.; Moriyama, S.; Sato, M.; Nemoto, M.; Kondoh, T.; Hamamatsu, K.

    1995-01-01

    Recent results on the minority ion second harmonic heating on JT-60U are presented. Maximum coupled power reached 6.4MW. Good antenna-plasma coupling capability and a small fraction (less than 10%) of an incremental radiation loss to r.f. power are confirmed. Power absorption rate increases with increasing r.f. power and is saturated around unity at r.f. powers higher than 3MW. The sawtooth stabilization by minority ion second harmonic heating was realized over a wide parameter range, i.e. I P =0.9MA-4MA, q 95 =2.3-8.6, n e =(1.3-5)x10 19 m -3 and P IC ≥2.2MW. A figure of merit V P left angle n e right angle /P tot for efficiency of the sawtooth stabilization is about 50% higher than those in other devices where fundamental resonance minority ion heating is employed. The longest stable period reached 2.33s. Attainable sawtooth-free periods scale with the resistive diffusion time. It was found that the energy confinement is further improved by 25% during the reheating phase after the giant sawtooth crash. The electron temperature profile became more peaked at the improved confinement phase. Those phenomena were observed only in low q discharges (q 95 ≤2.9). ((orig.))

  18. Recent developments in the production of liquid fuels via catalytic conversion of microalgae: experiments and simulations

    Energy Technology Data Exchange (ETDEWEB)

    Shi, Fan; Wang, Pin; Duan, Yuhua; Link, Dirk; Morreale, Bryan

    2012-01-01

    Due to continuing high demand, depletion of non-renewable resources and increasing concerns about climate change, the use of fossil fuel-derived transportation fuels faces relentless challenges both from a world markets and an environmental perspective. The production of renewable transportation fuel from microalgae continues to attract much attention because of its potential for fast growth rates, high oil content, ability to grow in unconventional scenarios, and inherent carbon neutrality. Moreover, the use of microalgae would minimize ‘‘food versus fuel’’ concerns associated with several biomass strategies, as microalgae do not compete with food crops in the food chain. This paper reviews the progress of recent research on the production of transportation fuels via homogeneous and heterogeneous catalytic conversions of microalgae. This review also describes the development of tools that may allow for a more fundamental understanding of catalyst selection and conversion processes using computational modelling. The catalytic conversion reaction pathways that have been investigated are fully discussed based on both experimental and theoretical approaches. Finally, this work makes several projections for the potential of various thermocatalytic pathways to produce alternative transportation fuels from algae, and identifies key areas where the authors feel that computational modelling should be directed to elucidate key information to optimize the process.

  19. Some experience with the recent development of standards in radiation protection

    International Nuclear Information System (INIS)

    TSCHURLOVITS, M.

    2003-01-01

    Conceptual issues in Radiation protection are today subject of a development being faster and more complex than some years ago. Scientific progress has to be incorporated into standards and legislative issues, but the time schedule is becoming tighter than before. This is because developments take place by different bodies, under different constraints and also in different administrative levels and dimensions. This lead to a situation that additional interactions takes place and issues of practicability have to be taken into account, disregarding irrational political issues. Some major issues in 1990 recommendation are not yet implemented and not properly used. Another issue is that standards for different exposures are not discriminating between different potential of dose reduction, but execute all in the same manner. As the discrepancy between conceptual and practical issues becomes more diverging than before, some more effort is needed to develop links between different types of standards (as recommendations and technical standards). In the present paper, the recent development for some modes of exposure is discussed considering issues as interaction of different types of standards, use of different dose quantities, hierarchy of limits. (author)

  20. Recent Advances In Structural Vibration And Failure Mode Control In Mainland China: Theory, Experiments And Applications

    International Nuclear Information System (INIS)

    Li Hui; Ou Jinping

    2008-01-01

    A number of researchers have been focused on structural vibration control in the past three decades over the world and fruit achievements have been made. This paper introduces the recent advances in structural vibration control including passive, active and semiactive control in mainland China. Additionally, the co-author extends the structural vibration control to failure mode control. The research on the failure mode control is also involved in this paper. For passive control, this paper introduces full scale tests of buckling-restrained braces conducted to investigate the performance of the dampers and the second-editor of the Code of Seismic Design for Buildings. For active control, this paper introduces the HMD system for wind-induced vibration control of the Guangzhou TV tower. For semiactive control, the smart damping devices, algorithms for semi-active control, design methods and applications of semi-active control for structures are introduced in this paper. The failure mode control for bridges is also introduced

  1. What is all this fuss about Tus? Comparison of recent findings from biophysical and biochemical experiments

    KAUST Repository

    Berghuis, Bojk A.

    2017-11-07

    Synchronizing the convergence of the two-oppositely moving DNA replication machineries at specific termination sites is a tightly coordinated process in bacteria. In Escherichia coli, a “replication fork trap” – found within a chromosomal region where forks are allowed to enter but not leave – is set by the protein–DNA roadblock Tus–Ter. The exact sequence of events by which Tus–Ter blocks replisomes approaching from one direction but not the other has been the subject of controversy for many decades. Specific protein–protein interactions between the nonpermissive face of Tus and the approaching helicase were challenged by biochemical and structural studies. These studies show that it is the helicase-induced strand separation that triggers the formation of new Tus–Ter interactions at the nonpermissive face – interactions that result in a highly stable “locked” complex. This controversy recently gained renewed attention as three single-molecule-based studies scrutinized this elusive Tus–Ter mechanism – leading to new findings and refinement of existing models, but also generating new questions. Here, we discuss and compare the findings of each of the single-molecule studies to find their common ground, pinpoint the crucial differences that remain, and push the understanding of this bipartite DNA–protein system further.

  2. New Mexico Liquid Metal αω -dynamo experiment: Most Recent Progress

    Science.gov (United States)

    Si, Jiahe; Sonnenfeld, Richard; Colgate, Art; Li, Hui

    2017-10-01

    The goal of the New Mexico Liquid Metal αω -dynamo experiment is to demonstrate a galactic dynamo can be generated through two phases, the ω-phase and α-phase by two semi-coherent flows in laboratory. We have demonstrated an 8-fold poloidal-to-toroidal flux amplification from differential rotation (the ω-effect) by minimizing turbulence in our apparatus. To demonstrate the α-effect, major upgrades are needed. The upgrades include building a helicity injection facility, mounting new 100hp motors and new sensors, designing a new data acquisition system capable of transmitting data from about 80 sensors in a high speed rotating frame with an overall 200kS/sec sampling rate. We hope the upgrade can be utilized to answer the question of whether a self-sustaining αω -dynamo can be implemented with a realistic lab fluid flow field, as well as to obtain more details to understand dynamo action in highly turbulent Couette flow.

  3. The Canadian CANDU fuel development program and recent fuel operating experience

    International Nuclear Information System (INIS)

    Lau, J.H.K.; Inch, W.W.R.; Cox, D.S.; Steed, R.G.; Kohn, E.; Macici, N.N.

    1999-01-01

    This paper reviews the performance of the CANDU fuel in the Canadian CANDU reactors in 1997 and 1998. The operating experience demonstrates that the CANDU fuel has performed very well. Over the two-year period, the fuel-bundle defect rate for all bundles irradiated in the Canadian CANDU reactors has remained very low, at between 0.006% to 0.016%. On a fuel element basis, this represents an element defect rate of less than about 0.0005%. One of the reasons for the good fuel performance is the support provided by the Canadian fuel research and development programs. These programs address operational issues and provide evolutionary improvements to the fuel products. The programs consist of the Fuel Technology Program, funded by the CANDU Owners Group, and the Advanced Fuel and Fuel Cycles Technology Program, funded by Atomic Energy of Canada Ltd. These two programs, which have been in place for many years, complement each other by sharing expert resources and experimental facilities. This paper describes the programs in 1999/2000, to provide an overview of the scope of the programs and the issues that these programs address. (author)

  4. [Recent developments on the European ban on animal experiments for cosmetics].

    Science.gov (United States)

    Ruhdel, I W

    2001-01-01

    For the second time the European Commission has postponed the sales ban on cosmetics products that have been developed and tested in animal experiments now until 2002. In the meantime the Commission wants to adopt the Seventh Amendment of the EU Cosmetics Directive. In its draft the Commission proposes to scrap the sales ban and replace it with an animal testing ban. This change would avoid possible conflicts with the WTO, however, from the animal welfare point of view would result in animal testing moving into third countries instead of avoiding them. This is because cosmetics products tested on animals outside the EU could be sold in the EU without any restrictions. As a consequence this measure would take the pressure from authorities and industry to further develop and adopt alternative methods. Other proposed measures are not acceptable from the animal welfare point of view, e.g. because they contradict Directive 86/609 and would result in a delay of the application of validated alternative methods. The Deutscher Tierschutzbund therefore still demands an immediate and complete sales ban in connection with an animal testing ban within the EU.

  5. Private initiatives and policy options: recent health system experience in India.

    Science.gov (United States)

    Purohit, B C

    2001-03-01

    In the recent past the impact of structural adjustment in the Indian health care sector has been felt in the reduction in central grants to States for public health and disease control programmes. This falling share of central grants has had a more pronounced impact on the poorer states, which have found it more difficult to raise local resources to compensate for this loss of revenue. With the continued pace of reforms, the likelihood of increasing State expenditure on the health care sector is limited in the future. As a result, a number of notable trends are appearing in the Indian health care sector. These include an increasing investment by non-resident Indians (NRIs) in the hospital industry, leading to a spurt in corporatization in the States of their original domicile and an increasing participation by multinational companies in diagnostics aiming to capture the potential of the Indian health insurance market. The policy responses to these private initiatives are reflected in measures comprising strategies to attract private sector participation and management inputs into primary health care centres (PHCs), privatization or semi-privatization of public health facilities such as non-clinical services in public hospitals, innovating ways to finance public health facilities through non-budgetary measures, and tax incentives by the State governments to encourage private sector investment in the health sector. Bearing in mind the vital importance of such market forces and policy responses in shaping the future health care scenario in India, this paper examines in detail both of these aspects and their implications for the Indian health care sector. The analysis indicates that despite the promising newly emerging atmosphere, there are limits to market forces; appropriate refinement in the role of government should be attempted to avoid undesirable consequences of rising costs, increasing inequity and consumer exploitation. This may require opening the health

  6. Resident Research Experience and Career Path Association: A National Survey of Recent Otolaryngology Graduates.

    Science.gov (United States)

    Zahtz, Gerald; Vambutas, Andrea; Hussey, Heather M; Rosen, Lisa

    2014-07-01

    To determine whether the research rotation experience affects the career path of otolaryngology residents. Two web-based surveys were disseminated by the AAO-HNS; one to current and former resident trainees and the other to current residency program directors. A web-based survey was disseminated to all AAO-HNS members classified as otolaryngology residents or residency graduates within the last 6 years, regarding their research rotation and its potential influence on their career path. A second web-based survey was delivered simultaneously to program directors to evaluate their perception of the need for research in a training program and their role in the rotation. Chi-square tests for independence as well as multivariate analyses were conducted to determine whether aspects of the resident research rotation related to career path. The resident survey was completed by 350 respondents (25% response rate), and 39 program directors completed the second survey (37% response rate). Multiple factors were examined, including federal funding of faculty, mentorship, publications prior to residency, success of research project measured by publication or grant submission, and type of research. Multivariate analyses revealed that factors most predictive of academic career path were intellectual satisfaction and presence of a T32 training grant within the program (P research rotation vary across institutions. Factors that enhance stronger intellectual satisfaction and the presence of T32 grant, which demonstrates an institution's commitment to research training, may promote pursuit of a career in academia versus private practice. © American Academy of Otolaryngology—Head and Neck Surgery Foundation 2014.

  7. Effectiveness of an integrated approach to reduce perinatal mortality: recent experiences from Matlab, Bangladesh

    Directory of Open Access Journals (Sweden)

    Rahman Anisur

    2011-12-01

    Full Text Available Abstract Background Improving perinatal health is the key to achieving the Millennium Development Goal for child survival. Recently, several reviews suggest that scaling up available effective perinatal interventions in an integrated approach can substantially reduce the stillbirth and neonatal death rates worldwide. We evaluated the effect of packaged interventions given in pregnancy, delivery and post-partum periods through integration of community- and facility-based services on perinatal mortality. Methods This study took advantage of an ongoing health and demographic surveillance system (HDSS and a new Maternal, Neonatal and Child Health (MNCH Project initiated in 2007 in Matlab, Bangladesh in half (intervention area of the HDSS area. In the other half, women received usual care through the government health system (comparison area. The MNCH Project strengthened ongoing maternal and child health services as well as added new services. The intervention followed a continuum of care model for pregnancy, intrapartum, and post-natal periods by improving established links between community- and facility-based services. With a separate pre-post samples design, we compared the perinatal mortality rates between two periods--before (2005-2006 and after (2008-2009 implementation of MNCH interventions. We also evaluated the difference-of-differences in perinatal mortality between intervention and comparison areas. Results Antenatal coverage, facility delivery and cesarean section rates were significantly higher in the post- intervention period in comparison with the period before intervention. In the intervention area, the odds of perinatal mortality decreased by 36% between the pre-intervention and post-intervention periods (odds ratio: 0.64; 95% confidence intervals: 0.52-0.78. The reduction in the intervention area was also significant relative to the reduction in the comparison area (OR 0.73, 95% CI: 0.56-0.95; P = 0.018. Conclusion The continuum

  8. Recent experience with multidisciplinary analysis and optimization in advanced aircraft design

    Science.gov (United States)

    Dollyhigh, Samuel M.; Sobieszczanski-Sobieski, Jaroslaw

    1990-01-01

    The task of modern aircraft design has always been complicated due to the number of intertwined technical factors from the various engineering disciplines. Furthermore, this complexity has been rapidly increasing by the development of such technologies as aeroelasticity tailored materials and structures, active control systems, integrated propulsion/airframe controls, thrust vectoring, and so on. Successful designs that achieve maximum advantage from these new technologies require a thorough understanding of the physical phenomena and the interactions among these phenomena. A study commissioned by the Aeronautical Sciences and Evaluation Board of the National Research Council has gone so far as to identify technology integration as a new discipline from which many future aeronautical advancements will arise. Regardless of whether one considers integration as a new discipline or not, it is clear to all engineers involved in aircraft design and analysis that better methods are required. In the past, designers conducted parametric studies in which a relatively small number of principal characteristics were varied to determine the effect on design requirements which were themselves often diverse and contradictory. Once a design was chosen, it then passed through the various engineers' disciplines whose principal task was to make the chosen design workable. Working in a limited design space, the discipline expert sometimes improved the concept, but more often than not, the result was in the form of a penalty to make the original concept workable. If an insurmountable problem was encountered, the process began over. Most design systems that attempt to account for disciplinary interactions have large empirical elements and reliance on past experience is a poor guide in obtaining maximum utilizations of new technologies. Further compounding the difficulty of design is that as the aeronautical sciences have matured, the discipline specialist's area of research has generally

  9. Novos modelos de gerência nos hospitais públicos: as experiências recentes

    Directory of Open Access Journals (Sweden)

    Cristiani Vieira Machado

    2001-06-01

    Full Text Available O artigo aborda a proliferação de modalidades de gerência e/ou de inserção de profissionais de saúde alternativas à administração estatal direta nos hospitais públicos brasileiros nos anos 90. Parte-se do pressuposto de que essas modalidades representam novas formas de articulação público-privada na área da saúde, o que remete à discussão mais ampla acerca do padrão de atuação do Estado na saúde. Assim, o movimento de proliferação de modalidades alternativas é analisado em função de três dimensões principais: a contexto macro-político em que esse movimento se inscreve, em especial debate acerca da Reforma do Estado e a condução das políticas de saúde; b as estratégias dos atores políticos- os gestores do sistema de saúde- de implementação dessas modalidades nos hospitais públicos; c a int1uência das especificidades das instituições - da esfera federal, estadual e municipal- na adoção dessas propostas. A pesquisa de campo se restringiu aos hospitais públicos localizados no Município do Rio de Janeiro. As modalidades identificadas no estudo foram: o modelo Organização Social; as fundações privadas de apoio aos hospitais; a terceirização da gerência de hospitais; e a terceirização de atividades assistenciais nos hospitais, principalmente através da contratação de coope rativas de profissionais de saúde. Observou-se que a proliferação das modalidades alternativas nesses hospitais se acentua no período pós-95, de forma compatível com as diretrizes nacionais de Reforma do Estado, e com a multiplicação dessas experiências em todo o país. Entretanto, esse movimento apresenta características diferentes nos hospitais da esfera federal, estadual e municipal. O artigo aponta também a relevância das escolhas e das estratégias políticas dos gestores do sistema de saúde para a adoção dessas propostas.The papel' addresses the proliferation 01' different types of managernent and/ 01' 01

  10. Paying for improvements in quality: recent experience in the NHS in England

    Directory of Open Access Journals (Sweden)

    Rachel Meacock

    2014-05-01

    Full Text Available There is a long-term international trend towards linking payments more closely to providers’ performance. The US and England have been at the forefront of the design and introduction of such pay-for-performance (P4P schemes. England’s experience is, however, likely to have greater salience for the Nordic countries’ health care systems due to the publicly funded finance structure. We review the development of five of England’s major schemes and summarise the available evidence on their impacts. These schemes are: the Quality and Outcomes Framework (QOF; Advancing Quality; the Commissioning for Quality and Innovation (CQUIN framework; Best Practice Tariffs; and the newest ‘non-payment’ policies. Much of the evidence is limited by the non-experimental way in which the schemes have been introduced, with limited data available prior to the introduction of the schemes and no experimentally unexposed providers to serve as controls. Nonetheless, the existing evidence suggests that P4P can result in modest short-term improvements in the incentivised aspects of performance. There is little evidence of effort diversion, yet some to suggest positive spillovers of these schemes onto non-incentivised aspects of performance. While there is some evidence of gaming and inequitable consequences, these do not appear to be widespread. The gains that can accrue across large patient populations as a result of relatively small financial incentives mean that P4P schemes can be cost-effective. P4P programmes are likely to be most effective when introduced as a supporting part to a wider quality improvement initiative, and when results are published to encourage a reputational as well as a financial incentive for improvement. Though the accumulation of evidence to support P4P has not been systematic or especially robust, it remains a popular policy tool with decision-makers in England, with its reach set to increase further in the future. Normal 0 false false

  11. Micro-fabric damages in Boom Clay inferred from cryo-BIB-SEM experiment: recent results

    Science.gov (United States)

    Desbois, Guillaume; Schmatz, Joyce; Klaver, Jop; Urai, Janos L.

    2017-04-01

    The Boom Clay is considered as a potential host rock in Belgium for nuclear waste disposal in a deep geological formation. One of the keys to understand the long-term performance of such a host rock is the fundamental understanding of coupling between microstructural evolution, poromechanical behaviour and the state of hydration of the system. At in situ conditions, Boom Clay is a nearly water-saturated (>94%) clay-rich geomaterial. Subsequently, for measurement of mechanical and transport properties in laboratory, cores of Boom Clay are vacuum-packed in Al-coated-poly-ethylene barrier foil to be best preserved at original hydric state. Because clay microstructures are very sensitive to dehydration, the validity of investigations done on such preserved or/and dried samples is often questionable. Desbois et al. (2009, 2013, 2014) showed the possibility to image fluid-filled porosity in Boom Clay, by using the FIB-cryo-SEM (FIB: Focussed Ion Beam) and FIB-cryo-SEM (BIB: Broad Ion Beam) techniques. However, surprisingly in Desbois et al. (2014), BIB-cryo-SEM experiments on Boom Clay, shown that the majority of the pores were fluid-free, contrasting with result in Desbois et al. (2009). In Desbois et al. (2014), several reasons were discussed to explain such discrepancies. The likely ones are the sealing efficiency of the Al-barrier foil at long term and the volume expansion due to the release of in-situ stress after core extraction, contributing both to dehydration and microfabric damage. This contribution presents the newest results based on cryo-BIB-SEM. Small pieces (30 mm3) of Boom Clay were preserved in liquid nitrogen after the core extraction at the MOL/Dessel Underground Research Laboratory in Belgium. A maximum of ten minutes time span was achieved between opening the core, the sub-sample extraction and the quenching of sub-samples in liquid nitrogen. First results show that all pores visible at cryo-SEM resolution are water saturated. However, water

  12. Sexual Risk-Taking Among Recently Emancipated Female Foster Youth: Sexual Trauma and Failed Family Reunification Experiences.

    Science.gov (United States)

    Gonzalez-Blanks, Ana; Yates, Tuppett M

    2016-12-01

    Foster youth evidence shows elevated rates of risk behaviors, including sexual risk-taking (e.g., unprotected sex). Some studies have identified child maltreatment, particularly sexual abuse, as a risk for later sexual risk-taking, but none have examined how child welfare placement experiences relate to youth's sexual risk-taking. This study investigated relations among child maltreatment, child welfare placements, and sexual risk-taking among 114 recently emancipated female foster youth. Sexual abuse and failed reunifications with parents were associated with greater sexual risk-taking. Moreover, dissociative symptoms exacerbated the relation between sexual abuse and sexual risk-taking. These findings highlight the need for greater consideration of risks associated with emancipated youth's sexual risk-taking and for more research to understand how youth experience unsuccessful family reunifications. © 2015 The Authors. Journal of Research on Adolescence © 2015 Society for Research on Adolescence.

  13. Recent progress in econophysics: Chaos, leverage, and business cycles as revealed by agent-based modeling and human experiments

    Science.gov (United States)

    Xin, Chen; Huang, Ji-Ping

    2017-12-01

    Agent-based modeling and controlled human experiments serve as two fundamental research methods in the field of econophysics. Agent-based modeling has been in development for over 20 years, but how to design virtual agents with high levels of human-like "intelligence" remains a challenge. On the other hand, experimental econophysics is an emerging field; however, there is a lack of experience and paradigms related to the field. Here, we review some of the most recent research results obtained through the use of these two methods concerning financial problems such as chaos, leverage, and business cycles. We also review the principles behind assessments of agents' intelligence levels, and some relevant designs for human experiments. The main theme of this review is to show that by combining theory, agent-based modeling, and controlled human experiments, one can garner more reliable and credible results on account of a better verification of theory; accordingly, this way, a wider range of economic and financial problems and phenomena can be studied.

  14. Alcohol use and alcohol/marijuana use during the most recent sexual experience differentially predict characteristics of the sexual experience among sexually active young adult drinkers.

    Science.gov (United States)

    Fairlie, Anne M; Garcia, Tracey A; Lee, Christine M; Lewis, Melissa A

    2018-07-01

    Few studies have examined associations between using alcohol only and using both alcohol and marijuana with sexual behavior on specific occasions. The current study examined alcohol and marijuana use during the most recent sexual experience in association with relationship characteristics, psychological issues, and condom use. Young adult drinkers aged 18-25 who reported not using a condom during sex in the past month were recruited nationally. An analytic subsample (N = 378) was identified based on substance use during the most recent sexual experience [53% female, 70% Caucasian; mean age = 22.42 years (SD = 1.90)]. Using logistic regression, two dummy codes compared the alcohol use only group (n = 197) and the both alcohol and marijuana group (n = 95) to the group who used neither substance (n = 86). Participant sex, drinking frequency, and number of sexual partners were included as covariates. The alcohol only group and the both alcohol and marijuana group had greater odds of being with a casual acquaintance and loss of respect compared to the group who used neither substance. The alcohol only group had greater odds of being with someone they just met and embarrassment compared to the group who used neither substance. No associations were found for condom use or emotional difficulties. Preventative interventions may need to address both alcohol and marijuana to more effectively reduce risky behaviors. Copyright © 2018 Elsevier Ltd. All rights reserved.

  15. For information: Geneva University - Recent results of the BaBar experiment on CP Violation in the B mesons decays

    CERN Multimedia

    Université de Genève

    2005-01-01

    UNIVERSITE DE GENEVE ECOLE DE PHYSIQUE Département de physique nucléaire et corspusculaire 24, Quai Ernest-Ansermet - 1211 GENEVE 4 Tél : (022) 379 62 73 Fax: (022) 379 69 92 Wednesday 18 May PARTICLE PHYSICS SEMINAR at 17:00 - Stückelberg Auditorium Recent results of the BaBar experiment on CP Violation in the B mesons decays by Prof. Jean-Pierre Lees / LAPP, Annecy After a brief introduction on B physics at B factories and the current status of the BaBar experiment, I will show how CP violation effects in the decays B->D(*)K(*) and B->D(*)pi/rho can be used to probe the value of the angle gamma of the Unitarity triangle, and what precision can be expected on this measurement by the end of the BaBar running, in 2008. Information: http://dpnc.unige.ch/seminaire/annonce.html Organizer: A. Cervera Villanueva

  16. Topical negative pressure therapy Recent experience of the department of plastic surgery at Ibn Sina University Hospital, Rabat, Morocco

    Directory of Open Access Journals (Sweden)

    Abdelmoughit Echchaoui

    2014-12-01

    Full Text Available IntroductionThe topical negative pressure therapy (TNP is a non-invasive method to treat chronic and acute wounds locally, using a continuous or intermittent negative pressure.The objective of this study is to present the first experience of this type of treatment used in clinical cases in our department. By presenting these cases, we highlight indication and efficiency of this new technique applied in relatively complicated situations, at the same time it also allows a significant improvement in treating injuries and chronic wounds.Materials and methodsIn this study, we present the recent experience of the Department of Reconstructive and Plastic Surgery of the University Hospital Center of Avicenne in Rabat. This therapy was used for the first time this year (in 2014, in three young patients who presented with chronic wounds associated with local and general factors that are unfavorable for the healing process.ResultsIn all three of our cases we obtained highly satisfactory clinical results.TNP allows wounds to bud in a shorter time, as well as a fast healing by second intention due to controlled wound healing or split-skin graft without using flaps. This enables to decrease the margin of error, the time and the number of dressing replacements, and to reduce the length of hospital stay.ConclusionThis is an expensive and specific equipment. However, the cost-benefit ratio analysis shows that it is an essential method that should be part of our therapeutic strategies.Keywords: loss of substance, negative pressure, budding, healing.  

  17. Recent Heavy Ion Results on the Hard Scattering and Jet Quenching from the ATLAS and CMS experiments on the LHC.

    CERN Document Server

    Olszewski, A; The ATLAS collaboration

    2014-01-01

    "Recent results on studies of hard scattering processes and jet quenching in nuclear collisions from the ATLAS \\cite{atlas} and CMS \\cite{cms} experiments at the Large Hadron Collider (LHC) are reviewed. They are based on high statistics samples of PbPb collisions at $\\sqrt{s_{\\rm NN}}=2.76$~TeV collected at the LHC in 2011 and $pp$ collisions at $\\sqrt{s}=2.76$~TeV and $p$Pb collisions at $\\sqrt{s_{\\rm NN}}=5.02$~TeV collected in 2013. New results for $R_{\\rm AA}$ the jet nuclear modification factors confirm a strong suppression of jet production. Modifications of jet fragmentation properties in PbPb collisions are observed. In $p$Pb collisions jets are not strongly modified but some non-scaling behavior of jet rates in collisions with different centralities is observed by ATLAS. New measurements for the electroweak boson production in $p$Pb collisions allow a more precise testing of parton distributions in lead nuclei with the conclusion that the EPS09 description of nuclear modifications of parton distribu...

  18. Recent Experiences of the NASA Engineering and Safety Center (NESC) GN and C Technical Discipline Team (TDT)

    Science.gov (United States)

    Dennehy, Cornelius J.

    2010-01-01

    The NASA Engineering and Safety Center (NESC), initially formed in 2003, is an independently funded NASA Program whose dedicated team of technical experts provides objective engineering and safety assessments of critical, high risk projects. The GN&C Technical Discipline Team (TDT) is one of fifteen such discipline-focused teams within the NESC organization. The TDT membership is composed of GN&C specialists from across NASA and its partner organizations in other government agencies, industry, national laboratories, and universities. This paper will briefly define the vision, mission, and purpose of the NESC organization. The role of the GN&C TDT will then be described in detail along with an overview of how this team operates and engages in its objective engineering and safety assessments of critical NASA projects. This paper will then describe selected recent experiences, over the period 2007 to present, of the GN&C TDT in which they directly performed or supported a wide variety of NESC assessments and consultations.

  19. Experiences of pain: a longitudinal, qualitative study of patients with head and neck cancer recently treated with radiotherapy.

    Science.gov (United States)

    Schaller, Anne; Larsson, Britt; Lindblad, Mona; Liedberg, Gunilla M

    2015-06-01

    It is not unusual for patients with head and neck cancer (HNC) to suffer from both tumor- and treatment-related pain that is difficult to alleviate despite individualized pain management. The aim of this qualitative study was to describe how HNC patients experience pain and how pain influences those who are treated with radiotherapy (RT). Qualitative semistructured interviews were performed 1 and 6 months after patients completed RT. The interviews addressed symptoms, moods, and suffering. The study included 26 patients with HNC who had recently completed RT. The interviews were analyzed using manifest content analysis. The main category was: HNC patients did not report that their severe physical pain influenced their psychological suffering, but it did influence their social lives. Furthermore, four categories were revealed: pain in the head and neck region, overwhelming fatigue, altered mood and preoccupied mind, and decreased participation and changed relationships. Physical pain, psychological distress, and social withdrawal were prominent at both interviews and consequently their situation can be considered as chronic. Remarkably, patients did not express a clear relationship between pain and psychological load. This may imply a biomedical view of pain or may reflect the difficult situation patients were in (i.e., facing a possibly life-threatening cancer). Thus, their situation might require a prioritization and might negatively affect the possibility of identifying the interaction between the different pain dimensions. The biopsychosocial model of chronic pain aims to understand the interaction between pain and psychosocial factors. Interventions aiming to teach patients with HNC how to internalize the biopsychosocial model framework to manage pain could be useful and should be evaluated in future research. Copyright © 2015 American Society for Pain Management Nursing. Published by Elsevier Inc. All rights reserved.

  20. Recent sea experience in South Africa and national principles: Learning from national scale SEAs for renewable energy and power corridors

    CSIR Research Space (South Africa)

    Lochner, Paul A

    2016-05-01

    Full Text Available Strategic Environmental Assessments (SEAs) for the development of wind and solar photovoltaic (PV) energy and powerline corridors have recently been completed in South Africa, leading to a decision by the South African Cabinet in February 2016...

  1. The Experience of Condom Use and Other Sexual Risk Practices among Male Brewery Employees Who Recently Migrated in Nigeria

    Science.gov (United States)

    Sunmola, Adegbenga M; Adebayo, Dada; Olapegba, Makinde; Alarape, Aderemi

    2006-01-01

    Objective: To identify factors that predict condom use and sexual practices of brewery employees who had recently been on short- and longterm migration in the course of their jobs in Nigeria. Design: A cross-sectional survey design was adopted to investigate the relationship between sexual practices and condom use of migrant employees, and to…

  2. The Colour of Skill: Contesting a Racialised Regime of Skill from the Experience of Recent Immigrants in Canada

    Science.gov (United States)

    Guo, Shibao

    2015-01-01

    This article contests a racialised skills regime in Canada. Canadian studies of the labour market transitions of skilled immigrants are analysed through the lens of critical race theory. The analysis shows that knowledge and skills of recent immigrants in Canada are racialised and materialised on the basis of ethnic and national origins. Skin…

  3. A Bayes Factor Meta-Analysis of Recent Extrasensory Perception Experiments: Comment on Storm, Tressoldi, and Di Risio (2010)

    Science.gov (United States)

    Rouder, Jeffrey N.; Morey, Richard D.; Province, Jordan M.

    2013-01-01

    Psi phenomena, such as mental telepathy, precognition, and clairvoyance, have garnered much recent attention. We reassess the evidence for psi effects from Storm, Tressoldi, and Di Risio's (2010) meta-analysis. Our analysis differs from Storm et al.'s in that we rely on Bayes factors, a Bayesian approach for stating the evidence from data for…

  4. Recent Results from the Precision Array for Probing the Epoch of Reionization (PAPER) Experiment in South Africa

    Science.gov (United States)

    Backer, Donald C.; PAPER Collaboration

    2010-01-01

    The goal of the Precision Array for Probing the Epoch of Reionization (PAPER) experiment is detection of the power spectrum of the fluctuations of 21cm emission at high redshift (7-11) when the first stars were forming. The design of PAPER consists of broad-band dipoles, active balun, coaxial cable transmission, analog gain/filtering, digitization and correlation. Analysis of PAPER data requires RFI excision, iterative calibration and source removal, and full-hemisphere imaging. A 16-dipole engineering test array has been deployed at the NRAO Green Bank, WV site; a 4-dipole was deployed in Western Australia in 2007. See Parsons et al. arXiv:0904.2334 for a brief description of the status of the experiment in the middle of 2009. This poster will describe the first deployment of a PAPER experiment at the Karoo SKA development site in South Africa. Our work has been supported by the National Science Foundation; we thank the South African MeerKAT team for their generous contributions.

  5. Recent Measurement of Flavor Asymmetry of Antiquarks in the Proton by Drell–Yan Experiment SeaQuest at Fermilab

    Energy Technology Data Exchange (ETDEWEB)

    Nagai, Kei [Tokyo Inst. of Technology (Japan)

    2017-01-27

    A measurement of the flavor asymmetry of the antiquarks ($\\bar{d}$ and $\\bar{u}$) in the proton is described in this thesis. The proton consists of three valence quarks, sea quarks, and gluons. Antiquarks in the proton are sea quarks. They are generated from the gluon splitting: g → q + $\\bar{q}$. According to QCD (Quantum Chromodynamics), the gluon splitting is independent of quark flavor. It suggests that the amounts of $\\bar{d}$ and $\\bar{u}$ should be the same in the proton. However, the NMC experiment at CERN found that the amount of $\\bar{d}$ is larger than that of $\\bar{u}$ in the proton using the deep inelastic scattering in 1991. This result is obtained for $\\bar{d}$ and $\\bar{u}$ integrated over Bjorken x. Bjorken x is the fraction of the momentum of the parton to that of the proton. The NA51 experiment (x ~ 0.2) at CERN and E866/NuSea experiment (0.015 < x < 0.35) at Fermilab measured the flavor asymmetry of the antiquarks ($\\bar{d}$/$\\bar{u}$) in the proton as a function of x using Drell–Yan process. The experiments reported that the flavor symmetry is broken over all measured x values. Understanding the flavor asymmetry of the antiquarks in the proton is a challenge of the QCD. The theo- retical investigation from the first principle of QCD such as lattice QCD calculation is important. In addition, the QCD effective models and hadron models such as the meson cloud model can also be tested with the flavor asymmetry of antiquarks. From the experimental side, it is important to measure with higher accuracy and in a wider x range. The SeaQuest (E906) experiment measures $\\bar{d}$/$\\bar{u}$ at large x (0.15 < x < 0.45) accurately to understand its behavior. The SeaQuest experiment is a Drell–Yan experiment at Fermi National Accelerator Laboratory (Fermilab). In the Drell–Yan process of proton-proton reaction, an antiquark in a proton and a quark in another proton annihilate and create a virtual photon, which then decays into a muon pair

  6. The Impact of the Global Economic Crisis on the Business Environment:Recent European Experience and Support Measures

    Directory of Open Access Journals (Sweden)

    Angela ROMAN

    2011-11-01

    Full Text Available The aim of our paper is to underline the main characteristics of the business and economical environment and emphasise the negative implications of the recent economic crisis on a panel of EU member countries, namely:Bulgaria, Hungary, Latvia, Lithuania and Romania. The results of our research are pointing out the challenges and difficulties that the business environment from the panel countries is facing and also the need for the decision and policy makers to intensify their preoccupations and efforts in order to help and stimulate the enhancement of the business environment and thus achieve a sustainable long term economic growth.

  7. Fourier photospectroscopy of Xe-C60 through a Xe 4d resonance window: theory versus recent experiment

    International Nuclear Information System (INIS)

    Patel, Aakash B; Chakraborty, Himadri S

    2011-01-01

    The photoionization cross section of endohedral Xe-C 60 over a Xe 4d giant resonance energy region, calculated in the time-dependent local density approximation, is compared with recent measurements (Kilcoyne et al 2010 Phys. Rev. Lett. 105 213001). An analysis based on the Fourier transforms of oscillatory cross sections is performed to derive a number of inherent similarities between the prediction and the data, including a large beating-type oscillation and several others of intermediate size. Results stress the need for more accurate measurements to access the wealth of information about the geometry of the system. (fast track communication)

  8. Recent results and future plans for a 45 actuator adaptive x-ray optics experiment at the advanced light source

    Energy Technology Data Exchange (ETDEWEB)

    Brejnholt, Nicolai F., E-mail: brejnholt1@llnl.gov; Poyneer, Lisa A.; Hill, Randal M.; Pardini, Tommaso; Hagler, Lisle; Jackson, Jessie; Jeon, Jae; McCarville, Thomas J.; Palmer, David W. [Lawrence Livermore National Laboratory, Livermore, California (United States); Celestre, Richard [Advanced Light Source - Lawrence Berkeley National Laboratory, Berkeley, California (United States); Brooks, Audrey D. [Northrop Grumman - AOA Xinetics Inc., Cambridge, Massachusetts (United States)

    2016-07-27

    We report on the current status of the Adaptive X-ray Optics project run by Lawrence Livermore National Laboratory (LLNL). LLNL is collaborating with the Advanced Light Source (ALS) to demonstrate a near real-time adaptive X-ray optic. To this end, a custom-built 45 cm long deformable mirror has been installed at ALS beamline 5.3.1 (end station 2) for a two-year period that started in September 2014. We will outline general aspects of the instrument, present results from a recent experimental campaign and touch on future plans for the project.

  9. Recent Lightning Experiments at the International Center for Lightning Research and Testing: From Ball Lightning to Gamma Rays

    Science.gov (United States)

    Uman, M. A.

    2008-12-01

    Recent lightning data and the instrumentation used to acquire it at the UF-FIT International Center for Lightning Research and Testing, located on about 1 square kilometer of flat ground at the Camp Blanding Army National Guard Base in north-central Florida, are discussed. The progress of several on-going studies is reviewed: (1) understanding the physics of the "classical" rocket-and-wire triggering of lightning from natural overhead thunderclouds, (2) attempting to generate ball lightning by allowing triggered-lightning to strike various materials and objects (e.g., tree-trunk sections, pools of salt water, silicon powder), (3) measuring the very close (100 m to 1 km) electric and magnetic fields of natural cloud-to-ground lightning, and (4) probing the relationship between lightning processes and the x-rays and gamma-rays associated with them.

  10. Modulating Tumor Immunology by Inhibiting Indoleamine 2,3-Dioxygenase (IDO): Recent Developments and First Clinical Experiences.

    Science.gov (United States)

    Davar, Diwakar; Bahary, Nathan

    2018-04-01

    Indoleamine 2,3-dioxygenase (IDO) and tryptophan 2,3-dioxygenase (TDO) catalyze the first rate-limiting step in the oxidative metabolism of compounds containing indole rings, including the transformation of the essential amino acid L-tryptophan to N-formyl-L-kynurenine. Through direct and indirect means, IDO exerts both tolerogenic and pro-inflammatory effects and has a profound immunoregulatory role in the tumor microenvironment. Although the role of IDO in mediating peripheral acquired immunologic tolerance has been known for some time, its role in tumorigenesis and the subversion of anti-tumor immunity have only recently been appreciated. Small-molecule inhibitors of IDO1 and TDO are being evaluated as single agents and in combination with immune checkpoint blockade in a host of advanced cancers. In this review, we delineate the tolerogenic and pro-inflammatory effects of IDO as it relates to immune escape and discuss current clinical progress in this area.

  11. From Idea to Innovation: The Role of LDRD Investments in Sandia's Recent Successful B61 Experiments.

    Energy Technology Data Exchange (ETDEWEB)

    Arrowsmith, Marie Danielle [Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)

    2015-11-01

    The Laboratory Directed Research and Development (LDRD) program, authorized by U.S. Congress in 1991, enables Department of Energy (DOE) laboratories to devote a small portion of their research funding to high-risk and potentially high-payoff research. Because it is high-risk, LDRD-supported research may not lead to immediate mission impacts; however, many successes at DOE labs can be traced back to investments in LDRD. LDRD investments have a history of enabling significant payoffs for long-running DOE and NNSA missions and for providing anticipatory new technologies that ultimately become critical to future missions. Many of Sandia National Laboratories’ successes can be traced back to investments in LDRD. Capabilities from three LDRDs were critical to recent tests of the B61-12 gravity bomb—tests that would previously have only been performed experimentally.

  12. Recent progress of the NEA Stripa project on in situ experiments in granite associated with the disposal of radioactive waste

    International Nuclear Information System (INIS)

    Carlyle, S.G.; Carlsson, H.S.

    1987-01-01

    The NEA Stripa project has devoted considerable effort to the measurement and assessment of the hydrogeology, hydrogeochemistry and migration phenomena of the stripa granite and to the simulation of conditions likely to be found within an engineered repository in granitic rock. These include refining existing, and developing new, geophysical and hydraulic techniques for the mapping and characterization of fractures in crystalline rocks; conducting field experiments to assess the migration of tracers in single-and multiple-fracture systems; and studying the behaviour of bentonite clay as the back-filling and sealing material in a granitic environment. This paper summarizes the most important findings and outlines the main aims of possible future research under any phase 3 of the project. The latter may include making mathematical predictions of the hydrogeological behavior of the Stripa granite and their subsequent validation by field measurements

  13. The NHS breast screening programme (pathology) EQA: experience in recent years relating to issues involved in individual performance appraisal.

    Science.gov (United States)

    Parham, D M; Coleman, D; Kodikara, S; Moss, S; Ellis, I O; Al-Sam, S; Anderson, N; Bobrow, L; Buley, I; Connolly, C E; Dallimore, N S; Hales, S; Hanby, A; Humphreys, S; Knox, F; Lowe, J; Macartney, J; Nash, R; Patnick, J; Pinder, S E; Quinn, C M; Robertson, A J; Shrimankar, J; Walker, R A; Wells, C; Winder, R; Patel, N

    2006-02-01

    The original role of the National Health Service breast screening programme (pathology) external quality assessment (EQA) scheme was educational; it aimed to raise standards, reinforce use of common terminology, and assess the consistency of pathology reporting of breast disease in the UK. To examine the performance (scores) of pathologists participating in the scheme in recent years. The scheme has evolved to help identify poor performers, reliant upon setting an acceptable cutpoint. Therefore, the effects of different cutpoint strategies were evaluated and implications discussed. Pathologists who joined the scheme improved over time, particularly those who did less well initially. There was no obvious association between performance and the number of breast cancer cases reported each year. This is not unexpected because the EQA does not measure expertise, but was established to demonstrate a common level of performance (conformity to consensus) for routine cases, rather than the ability to diagnose unusual/difficult cases. A new method of establishing cutpoints using interquartile ranges is proposed. The findings also suggest that EQA can alter a pathologist's practice: those who leave the scheme (for whatever reason) have, on average, marginally lower scores. Consequently, with the cutpoint methodology currently used (which is common to several EQA schemes) there is the potential for the cutpoint to drift upwards. In future, individuals previously deemed competent could subsequently be erroneously labelled as poor performers. Due consideration should be given to this issue with future development of schemes.

  14. Recent ORNL experience in site performance prediction: the Gas Centrifuge Enrichment Plant and the Oak Ridge Central Waste Disposal Facility

    International Nuclear Information System (INIS)

    Pin, F.G.

    1985-01-01

    The suitability of the Portsmouth Gas Centrifuge Enrichment Plant Landfill and the Oak Ridge, Tennessee, Central Waste Disposal Facility for disposal of low-level radioactive waste was evaluated using pathways analyses. For these evaluations, a conservative approach was selected; that is, conservatism was built into the analyses when assumptions concerning future events had to be made or when uncertainties concerning site or waste characteristics existed. Data from comprehensive laboratory and field investigations were used in developing the conceptual and numerical models that served as the basis for the numerical simulations of the long-term transport of contamination to man. However, the analyses relied on conservative scenarios to describe the generation and migration of contamination and the potential human exposure to the waste. Maximum potential doses to man were calculated and compared to the appropriate standards. Even under this conservative framework, the sites were found to provide adequate buffer to persons outside the DOE reservations and conclusions concerning site capacity and site acceptability were drawn. Our experience through these studies has shown that in reaching conclusions in such studies, some consideration must be given to the uncertainties and conservatisms involved in the analyses. Analytical methods to quantitatively assess the probability of future events to occur and to quantitatively determine the sensitivity of the results to data uncertainty may prove useful in relaxing some of the conservatism built into the analyses. The applicability of such methods to pathways analyses is briefly discussed

  15. Finite-difference time-domain modeling of infrasound from pulsating auroras and comparison with recent experiments

    Science.gov (United States)

    de Larquier, S.; Pasko, V. P.; Stenbaek-Nielsen, H. C.; Wilson, C. R.; Olson, J. V.

    2009-12-01

    Atmospheric infrasonic waves are acoustic waves with frequencies ranging from 0.02 to 10 Hz, slightly higher than the acoustic cut-off frequency (approximately 0.032 Hz), but lower than the audible frequencies (typically 20 Hz-15 kHz) [e.g., Blanc, Ann. Geophys., 3, 673, 1985]. A number of natural events have been identified as generating atmospheric infrasound, such as volcanoes, tornadoes, avalanches, earthquakes [e.g., Bedard and Georges, Physics Today, S3, 32, 2000], ocean surfaces [e.g., Gossard and Hooke, Waves in the Atmosphere, Elsevier, 1975, Ch. 9], lightning [e.g., Assink et al., GRL, 35, L15802, 2008; Pasko, JGR, 114, D08205, 2009], or transient luminous events in the middle atmosphere termed sprites [e.g., Farges, Lightning: Principles, Instruments and Applications, H.D. Betz et al. (eds), Springer, 2009, Ch. 18]. The importance of infrasound studies has been emphasized in the past ten years from the Comprehensive Nuclear-Test-Ban Treaty verification perspective [e.g., Le Pichon et al., JGR, 114, D08112, 2009]. A proper understanding of infrasound propagation in the atmosphere is required for identification and classification of different infrasonic waves and their sources [Drob et al., JGR, 108, D21, 4680, 2003]. The goal of the present work is to provide a quantitative interpretation and explanation of infrasonic signatures from pulsating auroras reported recently by Wilson et al. [GRL, 32, L14810, 2005]. The infrasound signals observed with an infrasonic array at Fairbanks, Alaska had a mean amplitude of 0.05 Pa, a delay of about 5 minutes from the pulsating aurora, and an almost normal incidence on the ground plane [Wilson et al., 2005]. We employ a finite-difference time-domain (FDTD) model of infrasound propagation in a realistic atmosphere. We use the absorption model of infrasound introduced by Sutherland and Bass [J. Acoust. Soc. Am., 115, 1012, 2004]. Classical absorption mechanisms as well as molecular relaxation mechanisms are taken into

  16. Recent references

    International Nuclear Information System (INIS)

    Ramavataram, S.

    1991-01-01

    In support of a continuing program of systematic evaluation of nuclear structure data, the National Nuclear Data Center maintains a complete computer file of references to the nuclear physics literature. Each reference is tagged by a keyword string, which indicates the kinds of data contained in the article. This master file of Nuclear Structure References (NSR) contains complete keyword indexes to literature published since 1969, with partial indexing of older references. Any reader who finds errors in the keyword descriptions is urged to report them to the National Nuclear Data Center so that the master NSR file can be corrected. In 1966, the first collection of Recent References was published as a separate issue of Nuclear Data Sheets. Every four months since 1970, a similar indexed bibliography to new nuclear experiments has been prepared from additions to the NSR file and published. Beginning in 1978, Recent References was cumulated annually, with the third issue completely superseding the two issues previously published during a given year. Due to publication policy changes, cumulation of Recent Reference was discontinued in 1986. The volume and issue number of all the cumulative issues published to date are given. NNDC will continue to respond to individual requests for special bibliographies on nuclear physics topics, in addition to those easily obtained from Recent References. If the required information is available from the keyword string, a reference list can be prepared automatically from the computer files. This service can be provided on request, in exchange for the timely communication of new nuclear physics results (e.g., preprints). A current copy of the NSR file may also be obtained in a standard format on magnetic tape from NNDC. Requests for special searches of the NSR file may also be directed to the National Nuclear Data Center

  17. Planning for Sea Level Rise: An AGU Talk in the Form of a Co-Production Experiment Exploring Recent Science

    Science.gov (United States)

    Behar, D. H.; Kopp, R. E.; DeConto, R.; Weaver, C. P.; White, K. D.; May, K.; Bindschadler, R.

    2017-12-01

    Global sea level rise (SLR) may present the most urgent climate change adaptation challenge facing coastal communities today. The direction is clear, impacts are manifesting now, and the pace of rise is likely to accelerate. As a result, many coastal communities have begun planning their adaptation response and some are quite far along in the process. At the same time, evolving science provides new observations, models, and understanding of land-ocean dynamics that can increase clarity while also in many ways increase uncertainty about the scope, timing, and regional nature of SLR. The planning, design, and construction of water infrastructure has a relatively long timeline (up to 30 years), and thus the evolution of scientific knowledge presents challenges for communities already planning for SLR based on previous information. When does science become actionable for decision-makers? Are there characteristics or thresholds that could cause communities decide to move from one set of scenarios to another, or change approaches altogether? This talk focuses on two important studies different in kind but dominating the conversation about SLR adaptation planning today. First, DeConto and Pollard (2016) have suggested significantly higher upper end projections for Antarctic ice sheet melt, which increase both global and regional SLR above most previously assumed upper limits. Second, probabilistic projections using model output and expert elicitation as presented in Kopp et al (2014) are increasingly appearing in federal reports and planning-related documents. These two papers are pushing the boundaries of the science-to-planning interface, while the application of this work as actionable science is far from settled. This talk will present the outcome of recent conversations among our diverse author team. The authors are engaged in SLR planning related contexts from many angles and perspectives and include the aforementioned Kopp and DeConto as well as representatives of

  18. Recent experiences in power development

    Energy Technology Data Exchange (ETDEWEB)

    Morrow, D. [EPCOR, Edmonton, AB (Canada)

    2002-07-01

    This PowerPoint presentation included a corporate profile of EPCOR, a power utility providing electricity, water and natural gas to 1.6 million customers in Alberta, British Columbia, Manitoba, Ontario, and the U.S. Pacific Northwest. With $4 billion in assets, the utility has operations in power generation, distribution, transmission, retail, and water services, with 70 per cent of its earnings generated outside Edmonton. Two of its operations are the Genesee plant in Alberta which is a 820 MW coal-fired plant, and the Taylor plant in Alberta which is a 13 MW run-of-the-river hydro plant. EPCOR's commitment to Alberta is primarily through coal development. EPCOR is looking into wind, hydro, waste heat, geothermal, and other green energy alternatives, with the expectation of generating 25 per cent of its new generation capacity as green energy. This presentation also outlined EPCOR's Weather Dancer 1 wind power project in the Peigan First Nation community in Alberta. It is estimated to generate about 3000 MWh of green energy per year. EPCOR is also looking into hydro opportunities at Miller Creek in British Columbia where it plans to construct a 32 MW plant. It is also willing to consider gas turbine and wood waste projects as well as cogeneration projects. 8 figs.

  19. Atomics International's recent decommissioning experience

    International Nuclear Information System (INIS)

    Kittinger, W.D.

    1981-01-01

    A program for decommissioning eight nuclear facilities has been underway by the Atomics International (AI) Division of Rockwell International during the past five years. The facilities are located at the Rockwell Santa Susana Field Laboratory, approximately 30 miles from the center of Los Angeles. The facilities served experimental and development programs for space nuclear power, liquid metal technology, and commercial power generation. The land involved is under lease to the Federal government and may revert to private ownership. The programs conducted in these facilities were terminated in the 1960s, and the facilities were placed in a layaway status. They were designated as being surplus to programmatic needs in the early 1970s, and decommissioning project authorization was received from the government in 1974

  20. The FINUDA experiment: recent results

    Energy Technology Data Exchange (ETDEWEB)

    Filippi, A., E-mail: filippi@to.infn.it [INFN sez. di Torino (Italy); Piano, S., E-mail: stefano.piano@ts.infn.it [INFN sez. di Trieste (Italy)

    2015-08-15

    A description of the techniques used in FINUDA to perform, by means of global fits, the analysis of some YN (hyperon-nucleon) spectra is reported. The study of the features of many experimental spectra and how they can be decomposed by contributions of Quasi-Free (QF) background reactions is a fundamental issue to achieve a good and reliable description of the K{sup −}2N→YN absorptions.

  1. Interprofessional experiences of recent healthcare graduates: A social psychology perspective on the barriers to effective communication, teamwork, and patient-centred care.

    Science.gov (United States)

    Thomson, Krist; Outram, Sue; Gilligan, Conor; Levett-Jones, Tracy

    2015-01-01

    Achieving safe, quality health care is highly dependent on effective communication between all members of the healthcare team. This study explored the attitudes and experiences of recent healthcare graduates regarding interprofessional teamwork and communication within a clinical setting. A total of 68 pharmacy, nursing, and medicine graduates participated in 12 semi-structured focus group discussions in clinical workplaces across three Australian states. Discussion focussed on graduates' experiences of interprofessional education and its impact on their capacity for interprofessional teamwork and communication. The Social Identity and Realistic Conflict theories were used as a framework for qualitative data analysis. A consistent pattern of profession-focussed, rather than patient- or team-focussed goals was revealed along with reports of negative stereotyping, hierarchical communication, and competition for time with the patient. Graduates acknowledged the importance of communication, teamwork, and patient-centred care and felt a better understanding of the roles of other health professionals would assist them to work together for patients' wellbeing. Identifying workplace identities and differential goals has uncovered possible motivations underlying health professionals' behaviour. These insights may help improve interprofessional collaboration by focusing attention on common team goals, increasing feelings of worth and being valued among different professionals, and decreasing the need for competition.

  2. The Daily Relationship Between Aspects of Food Insecurity and Medication Adherence Among People Living with HIV with Recent Experiences of Hunger.

    Science.gov (United States)

    Pellowski, Jennifer A; Kalichman, Seth C; Cherry, Sabrina; Conway-Washington, Christopher; Cherry, Chauncey; Grebler, Tamar; Krug, Larissa

    2016-12-01

    Limited access to resources can significantly impact health behaviors. Previous research on food insecurity and HIV has focused on establishing the relationship between lacking access to nutritious food and antiretroviral (ARV) medication non-adherence in a variety of social contexts. This study aims to determine if several aspects of food insecurity co-occur with missed doses of medication on a daily basis among a sample of people living with HIV who have recently experienced hunger. The current study utilized a prospective, observational design to test the daily relationship between food insecurity and medication non-adherence. Participants were followed for 45 days and completed daily assessments of food insecurity and alcohol use via interactive text message surveys and electronic medication adherence monitoring using the Wisepill. Fifty-nine men and women living with HIV contributed a total of 2,655 days of data. Results showed that severe food insecurity (i.e., hunger), but not less severe food insecurity (i.e., worrying about having food), significantly predicted missed doses of medication on a daily level. Daily alcohol use moderated this relationship in an unexpected way; when individuals were hungry and drank alcohol on a given day, they were less likely to miss a dose of medication. Among people living with HIV with recent experiences of hunger, this study demonstrates that there is a daily relationship between hunger and non-adherence to antiretroviral therapy. Future research is needed to test interventions designed to directly address the daily relationship between food insecurity and medication non-adherence.

  3. Educating Recent Immigrants.

    Science.gov (United States)

    IDRA Newsletter, 1994

    1994-01-01

    This newsletter contains six articles all related to the theme of education for recent legal and illegal immigrants. In "Golden Lord with Us from the Main Forest: Some Thoughts on the Education of Recent Immigrants," Aurelio M. Montemayor reflects on his experiences growing up in a bilingual, bicultural extended family of…

  4. Recent recordings

    CERN Multimedia

    Steve Goldfarb

    The University of Michigan ATLAS Collaboratory Project would like to announce the publication of a number of recent web lectures concerning ATLAS and the LHC. Most recently, we produced a series of presentations made at the First ATLAS Physics Workshop of the Americas, held at SLAC in August. The complete set of lectures can be found here.There is a lot of outstanding material there, relevant to all of ATLAS, including detector summaries, trigger and physics talks, software and computing presentations, and an overview of operations. Viewing requires a standard web browser with RealPlayer plug-in (included in most browsers automatically) and works on any major platform. Lectures can be viewed directly over the web or downloaded locally.Additional ATLAS material, including plenary lectures, workshops and tutorials, can be found via our portal athttp://www.wlap.org/atlasincluding: First ATLAS Physics Workshop of the Americas (Aug 2007) Glasgow Overview Week Plenary Sessions (Jul 2007) CTEQ Workshop: "Physics at ...

  5. Timely awareness and prevention of emerging chemical and biochemical risks in foods: Proposal for a strategy based on experience with recent cases

    NARCIS (Netherlands)

    Kleter, G.A.; Groot, M.J.; Poelman, M.; Kok, E.J.; Marvin, H.J.P.

    2009-01-01

    A number of recent food safety incidents have involved chemical substances, while various activities aim at the early identification of emerging chemical risks. This review considers recent cases of chemical and biochemical risks, as a basis for recommendations for awareness and prevention of

  6. Recent Workshops

    CERN Multimedia

    Wickens, F. J.

    Since the previous edition of ATLAS e-news, the NIKHEF Institute in Amsterdam has hosted not just one but two workshops related to ATLAS TDAQ activities. The first in October was dedicated to the Detector Control System (DCS). Just three institutes, CERN, NIKHEF and St Petersburg, provide the effort for the central DCS services, but each ATLAS sub-detector provides effort for their own controls. Some 30 people attended, including representatives for all of the ATLAS sub-detectors, representatives of the institutes working on the central services and the project leader of JCOP, which brings together common aspects of detector controls across the LHC experiments. During the three-day workshop the common components were discussed, and each sub-detector described their experiences and plans for their future systems. Whilst many of the components to be used are standard commercial components, a key custom item for ATLAS is the ELMB (Embedded Local Monitor Board). Prototypes for this have now been extensively test...

  7. Recent recordings

    CERN Multimedia

    Steven Goldfarb

    The University of Michigan ATLAS Collaboratory Project is happy to announce the publication of a number of recent web lectures, including the full Plenary Session from the ATLAS Overview Week, held at CERN in October. Archives from that event are located here and directly on the Indico agenda. Click on the pictures below to access more information. Latest NewsAs announced in the Collaborative Tool Workshop, held on Tuesday of the Overview Week, future events in the Michigan Archives will be available for viewing with a Flash Player plug-in (right image above), as well as the usual Real Player plug-in. This additional option, made possible by our usage of the Lecture Object and standard formats for storing all media and metadata, allows the viewer to choose her/his preferred environment. As always, viewing of the lectures is supported on all major platforms and browsers and there is also the option to download lectures for remote viewing with limited or no network bandwidth.ATLAS 2007 ArchivesAdditional...

  8. Articulação de políticas públicas a partir dos fóruns de competitividade setoriais: a experiência recente da cadeia produtiva têxtil e de confecções Sectorial competitiveness forums and public policy articulation: the recent experience of the textile and garment production chain

    Directory of Open Access Journals (Sweden)

    Samuel A. Antero

    2006-02-01

    Full Text Available Este artigo reflete sobre a ação do Fórum de Competitividade da Cadeia Produtiva Têxtil e de Confecções como articulador de políticas públicas e apresenta sugestões/ alternativas para essa cadeia produtiva. Inicia com um panorama sobre o fórum de competitividade, demonstrando seu conceito, objetivos e metodologia de trabalho, que prevê o consenso tripartite (empresários, trabalhadores e governo para a formulação de políticas públicas. Em seguida, desenvolve uma análise da evolução recente da cadeia produtiva têxtil e de confecções, buscando produzir um primeiro balanço dos problemas e potencialidades identificados. O artigo também analisa a experiência desse fórum de competitividade setorial, visando identificar inovações e problemas na coordenação e cooperação dos diversos atores para a consecução de políticas setoriais de desenvolvimento. Por último, aborda os principais desafios e dificuldades, dando especial ênfase a duas questões estratégicas: as ações para geração de emprego e renda e as ações para o desenvolvimento da competitividade da cadeia têxtil e de confecções.This article reflects upon the role of the Competitiveness Forum of the Textile and Garment Production Chain in public policymaking, and presents suggestions/alternatives for this chain. It begins by presenting an overview of the competitiveness forum, outlining the concept, objectives and work methodology, which calls for a tripartite consensus (business, workers, and government in public policymaking. In then examines the recent evolution of the textile and garment production chain, so as to present a balance of the identified problems and potentials. It analyzes the experience of this sectorial competitiveness forum so as to identify innovations and issues regarding the coordination and cooperation of the several agents involved in sectorial development policy-making. Finally, the article presents the main challenges and

  9. "From the prison door right to the sidewalk, everything went downhill," a qualitative study of the health experiences of recently released inmates.

    Science.gov (United States)

    Binswanger, Ingrid A; Nowels, Carolyn; Corsi, Karen F; Long, Jeremy; Booth, Robert E; Kutner, Jean; Steiner, John F

    2011-01-01

    In many states, budget constraints are prompting earlier release of prison inmates. Prior studies have demonstrated elevated mortality rates in the post-release period but little is known about the health experiences of former inmates in the transition from prison to the community. The objective of this study was to understand the health-seeking experiences, perceptions of risk, and medical and mental health needs of former prisoners in the first two months after release from prison. Participants consisted of 29 former inmates within the first two months after their release from prison to the Denver, Colorado area. Using qualitative methods, trained interviewers conducted individual, in-person, semi-structured interviews exploring participants' experiences with health, mental health, and health care since release. Interview transcripts were coded and analyzed utilizing a team-based approach to inductive analysis. We found that health-related behavior occurred in the context of a complex life experience, with logistical problems exacerbated by emotional distress. Major themes included 1) transitional challenges; 2) cognitive responses including perceptions about personal risk, knowledge and priorities; 3) emotional responses including pronounced stress, fear, anxiety, disappointment; and 4) health behaviors. Former inmates reported multiple challenges, poor transitional preparation preceding release, and inadequate or absent continuity of mental and physical health care in the context of significant emotional distress and anxiety. Improved release planning, coordination between the medical, mental health and criminal justice systems may reduce the risk of poor health outcomes for this population. Copyright © 2011 Elsevier Ltd. All rights reserved.

  10. Recent US target-physics-related research in heavy-ion inertial fusion: simulations for tamped targets and for disk experiments in accelerator test facilities

    Energy Technology Data Exchange (ETDEWEB)

    Mark, J.W.K.

    1982-03-22

    Calculations suggest that experiments relating to disk heating, as well as beam deposition, focusing and transport can be performed within the context of current design proposals for accelerator test-facilities. Since the test-facilities have lower ion kinetic energy and beam pulse power as compared to reactor drivers, we achieve high-beam intensities at the focal spot by using short focal distance and properly designed beam optics. In this regard, the low beam emittance of suggested multi-beam designs are very useful. Possibly even higher focal spot brightness could be obtained by plasma lenses which involve external fields on the beam which is stripped to a higher charge state by passing through a plasma cell. Preliminary results suggest that intensities approx. 10/sup 13/ - 10/sup 14/ W/cm/sup 2/ are achievable. Given these intensities, deposition experiments with heating of disks to greater than a million degrees Kelvin (100 eV) are expected.

  11. Recent US target-physics-related research in heavy-ion inertial fusion: simulations for tamped targets and for disk experiments in accelerator test facilities

    International Nuclear Information System (INIS)

    Mark, J.W.K.

    1982-01-01

    Calculations suggest that experiments relating to disk heating, as well as beam deposition, focusing and transport can be performed within the context of current design proposals for accelerator test-facilities. Since the test-facilities have lower ion kinetic energy and beam pulse power as compared to reactor drivers, we achieve high-beam intensities at the focal spot by using short focal distance and properly designed beam optics. In this regard, the low beam emittance of suggested multi-beam designs are very useful. Possibly even higher focal spot brightness could be obtained by plasma lenses which involve external fields on the beam which is stripped to a higher charge state by passing through a plasma cell. Preliminary results suggest that intensities approx. 10 13 - 10 14 W/cm 2 are achievable. Given these intensities, deposition experiments with heating of disks to greater than a million degrees Kelvin (100 eV) are expected

  12. Review of Andrés Solimano, International Migration in the Age of Crisis and Globalisation. Historical and Recent Experiences, Cambridge University Press, 2010. 223 Pp.

    Directory of Open Access Journals (Sweden)

    Dirina Claudiu – Ciprian

    2015-12-01

    Full Text Available “International Migration in the Age of Crisis and Globalization. Historical and Recent Experiences” represents a work of major interest in the field of migration and globalization. Apparently two concepts that relate one to another, on a background of major population dynamics, the two notions are the two important pillars in what might perfectly be described as a complex analysis of migration, starting from the elements that have initiated it, and culminating with a fine comparison of positive and negative aspects of this phenomenon.

  13. Timely awareness and prevention of emerging chemical and biochemical risks in foods: proposal for a strategy based on experience with recent cases.

    Science.gov (United States)

    Kleter, G A; Groot, M J; Poelman, M; Kok, E J; Marvin, H J P

    2009-05-01

    A number of recent food safety incidents have involved chemical substances, while various activities aim at the early identification of emerging chemical risks. This review considers recent cases of chemical and biochemical risks, as a basis for recommendations for awareness and prevention of similar risks at an early stage. These cases include examples of unapproved genetically modified food crops, intoxications with botanical products containing unintentionally admixed toxic herbs, residues of unapproved antibiotics and contaminants in farmed aquaculture species such as shrimp and salmon; and adverse effects of chemical and biological pesticides of natural origin. Besides case-specific recommendations for mitigation of future incidents of the same nature, general inferences and recommendations are made. It is recommended, for example, to establish databases for contaminants potentially present within products. Pro-active reconnaissance can facilitate the identification of products potentially contaminated with hazardous substances. In international trade, prevention and early identification of hazards are aided by management systems for product quality and safety, rigorous legislation, and inspections of consignments destined for export. Cooperation with the private sector and foreign authorities may be required to achieve these goals. While food and feed safety are viewed from the European perspective, the outcomes also apply to other regions.

  14. Recent results from Gargamelle

    International Nuclear Information System (INIS)

    Musset, P.

    1980-01-01

    Following a brief summary of the main results from recent neutrino experiments, recent results from Gargamelle, including experimental design, a description of the leptonic neuutral current reaction, signal corrections and calculations of the neutral current elastic reaction rate, are presented. Decay rates of charmed particles were also studied. A μ - μ - background signal is identified and a genuine μ + μ - signal of 30 + or - 8 events found. Only indirect evidence for the production of charmed particles produced in the hadronic reaction is found. Experimental designs and their constraints are discussed

  15. Multi-GeV electron beam and high brightness betatron x-ray generation in recent Texas Petawatt laser-driven plasma accelerator experiments

    Science.gov (United States)

    Wang, Xiaoming; Zgadzaj, Rafal; Fazel, Neil; Li, Zhengyan; Zhang, Xi; Henderson, Watson; Chang, Yen-Yu; Korzekwa, Rick; Tsai, H.-E.; Quevedo, Hernan; Dyer, Gilliss; Gaul, Erhard; Martinez, Mikael; Bernstein, Aaron; Spinks, Michael; Gordan, Joseph; Donovan, Michael; Khudik, Vladimir; Shvets, Gennady; Ditmire, Todd; Downer, Michael

    2014-10-01

    Compact laser-plasma accelerators (LPAs) driven by petawatt (PW) lasers have produced highly collimated, quasi-monoenergetic multi-GeV electron bunches with ~100 pC charge, which are promising sources of ultrafast x-rays. Here we report three recent advances in PW-LPA performance brought about by optimizing the focal volume of the Texas PW laser with a deformable mirror. First, we accelerated electrons up to 3 GeV with hundreds of pC over 1 GeV and 1 GeV, 10% >2 GeV). Third, by introducing a double-peaked laser focus, creating a ``double bubble'' that subsequently merged, we significantly increased electron charge (0.5 nC) above 1 GeV, while producing brighter (1022photon/mm2/rad/0.1%), harder (up to 30 keV) betatron x-rays, characterized by a multi-metal filter pack and phase-contrast imaging. We observe evidence of dimuon production by irradiating a high-Z target with this high-charge, GeV electron beam.

  16. Recent progress on air-bearing slumping of segmented thin-shell mirrors for x-ray telescopes: experiments and numerical analysis

    Science.gov (United States)

    Zuo, Heng E.; Yao, Youwei; Chalifoux, Brandon D.; DeTienne, Michael D.; Heilmann, Ralf K.; Schattenburg, Mark L.

    2017-08-01

    Slumping (or thermal-shaping) of thin glass sheets onto high precision mandrels was used successfully by NASA Goddard Space Flight Center to fabricate the NuSTAR telescope. But this process requires long thermal cycles and produces mid-range spatial frequency errors due to the anti-stick mandrel coatings. Over the last few years, we have designed and tested non-contact horizontal slumping of round flat glass sheets floating on thin layers of nitrogen between porous air-bearings using fast position control algorithms and precise fiber sensing techniques during short thermal cycles. We recently built a finite element model with ADINA to simulate the viscoelastic behavior of glass during the slumping process. The model utilizes fluid-structure interaction (FSI) to understand the deformation and motion of glass under the influence of air flow. We showed that for the 2D axisymmetric model, experimental and numerical approaches have comparable results. We also investigated the impact of bearing permeability on the resulting shape of the wafers. A novel vertical slumping set-up is also under development to eliminate the undesirable influence of gravity. Progress towards generating mirrors for good angular resolution and low mid-range spatial frequency errors is reported.

  17. Recent progress in the LACOMERA Project (Large-Scale Experiments on Core Degradation, Melt Retention and Coolability) at the Forschungszentrum Karslruhe

    International Nuclear Information System (INIS)

    Miassoedov, A.; Alsmeyer, H.; Eppinger, B.; Meyer, L.; Steinbrueck, M.

    2004-01-01

    The LACOMERA Project at the Forschungszentrum Karlsruhe (FZK) is a 3 year action within the 5 th Framework Programme of the EU. The overall objective of the project is to offer research institutions from the EU member countries and associated states access to four large-scale experimental facilities QUENCH, LIVE, DISCO-H, and COMET which can be used to investigate core melt scenarios from the beginning of core degradation to melt formation and relocation in the vessel, possible melt dispersion to the reactor cavity, and finally corium concrete interaction and corium coolability in the reactor cavity. As a result of two calls for proposals, seven organisations from four countries are expected to profit from the LACOMERA Project participating in preparation, conduct and analysis of the following experiments: QUENCH-L1: Air ingression impact on core degradation. The test has provided unique data for the investigation of air ingress phenomenology in conditions as representative as possible of the reactor case regarding the source term. QUENCH-L2: Boil-off of a flooded bundle. The test will be of a generic interest for all reactor types, providing a link between the severe accident and design basis areas, and would deliver oxidation and thermal hydraulic data at high temperatures. LIVE-L1: Simulation of melt relocation into the Reactor Pressure Vessel (RPV) lower head for VVER conditions. The experiment will provide important information on the melt pool behaviour during the stages of air circulation at the outer RPV surface with a subsequent flooding of the lower head. LIVE-L2: Transient corium spreading and its impact on the heat fluxes to the RPV wall and on the final shape of the melt in the RPV lower head. The test will address the questions of melt stabilisation and the effects of crust formation near the RPV wall for a nonsymmetrical melt pool shape. COMET-L1: Long-term 2D concrete ablation in siliceous concrete cavity at intermediate decay heat power level with

  18. The Recent Pathology Residency Graduate Job Search Experience: A Synthesis of 5 Years of College of American Pathologists Job Market Surveys.

    Science.gov (United States)

    Gratzinger, Dita; Johnson, Kristen A; Brissette, Mark D; Cohen, David; Rojiani, Amyn M; Conran, Richard M; Hoffman, Robert D; Post, Miriam D; McCloskey, Cindy B; Roberts, Cory A; Domen, Ronald E; Talbert, Michael L; Powell, Suzanne Z

    2018-04-01

    - Pathology residents and fellows tailor their training and job search strategies to an actively evolving specialty in the setting of scientific and technical advances and simultaneous changes in health care economics. - To assess the experience and outcome of the job search process of pathologists searching for their first non-fellowship position. - The College of American Pathologists (CAP) Graduate Medical Education Committee has during the past 5 years sent an annual job search survey each June to CAP junior members and fellows in practice 3 years or less who have actively searched for a non-fellowship position. - Job market indicators including job interviews, job offers, positions accepted, and job satisfaction have remained stable during the 5 years of the survey. Most survey respondents who had applied for at least 1 position had accepted a position at the time of the survey, and most applicants who had accepted a position were satisfied or very satisfied. However, most attested that finding a non-fellowship position was difficult. Despite a perceived push toward subspecialization in surgical pathology, the reported number of fellowships completed was stable. Respondent demographics were not associated with job search success with 1 significant exception: international medical school graduate respondents reported greater perceived difficulty in finding a position, and indeed, fewer reported having accepted a position. - Pathology residents and fellows seeking their first position have faced a relatively stable job market during the last 5 years, with most accepting positions with which they were satisfied.

  19. Processos participativos para elaboração de Planos Diretores Municipais: inovações em experiências recentes

    Directory of Open Access Journals (Sweden)

    Eleusina Lavor Holanda de Freitas

    2018-02-01

    Full Text Available Resumo A Constituição Brasileira de 1988 instituiu a democracia participativa. Em 2001, o Estatuto da Cidade tornou lei federal a cidade justa e sustentável e vinculou a participação à implementação dessa nova política urbana, de responsabilidade municipal. Em 2016, uma segunda leva de planos diretores foi elaborada, passando de “experiências” para tornar-se processo com peso nas decisões políticas. Arquitetos urbanistas estão entre os mais envolvidos. Atores sociais ligados à questão urbana se perguntam como melhorar e dar qualidade à participação no processo de revisão da legislação urbanística. Este texto apresenta métodos de trabalho nos processos participativos implementados que possam inspirar profissionais envolvidos com a democratização das cidades. São discutidos os casos dos municípios de Jundiaí e de Vinhedo, no Estado de São Paulo, que, com a introdução de inovadora metodologia participativa e com base em diferentes instrumentos de pesquisa, conseguiram resultados em leis que refletem um projeto de cidades mais democráticas e inclusivas.

  20. As parcerias público-privadas para o desenvolvimento de infraestrutura rodoviária: experiência recente em Portugal

    Directory of Open Access Journals (Sweden)

    Joaquim Filipe Ferraz Esteves Araújo

    2014-06-01

    Full Text Available As parcerias público-privadas (PPPs tornaram-se, nas últimas décadas, uma moda em todo o mundo. Tendo em mente o pressuposto teórico das PPPs, analisa-se a relação entre a utilização destas e os resultados obtidos no setor da construção e gestão de rodovias em Portugal. Por meio de revisão teórica da literatura e da análise dos dados existentes, propõe-se discutir os aspetos positivos e negativos dessa experiência. Os resultados apontam acordos de construção e gestão das rodovias que, na prática, não resultaram em uma mais-valia para o Estado, porque contrariam as boas práticas na utilização dos recursos públicos.

  1. El control de los agregados monetarios: lecciones y experiencias del caso venezolano reciente The control of monetary aggregates: lessons and experiences from the recent Venezuelan case

    Directory of Open Access Journals (Sweden)

    Leonardo V. Vera

    2009-04-01

    Full Text Available Este trabajo intenta exponer las dificultades que confronta la autoridad monetaria para ejercer algún grado de control sobre los agregados monetarios, y para ello evalúa la experiencia reciente de una economía abierta y dependiente de un recurso mineral exportable como Venezuela. El trabajo no sólo expone argumentos analíticos, sino además provee evidencia muy sencilla en demostración de que existen numerosas fuentes de endogeneidad de la base monetaria, del multiplicador y de otros agregados más amplios en la economía venezolana. Aunque el Banco Central en Venezuela no viene anunciando ni explicando públicamente la estrategia y el alcance de la política monetaria, el trabajo muestra que la autoridad monetaria se ha movido sigilosamente, en los últimos tiempos, hacia una estrategia de uso de las tasas marcadores de las operaciones de mercado abierto como variable operativa buscando un objetivo final de actividad económica.This work examines the difficulties and formidable challenges faced by monetary authorities to control the behavior of monetary aggregates in an open economy dependent of an exportable natural resource such as Venezuela. The work not only introduces analytical arguments but also provides some empirical evidence that shows the several sources of endogeneity in the monetary base, the multiplier and other wider monetary aggregates in Venezuela. Though the Central Bank currently does not announce a clear strategy and target for the practice of monetary policy, we argue that the monetary authority has recently moved towards a strategy of targeting short-term interest rates. Presumably, the use of the repo rate as a monetary policy instrument is tied to a final target of economic activity.

  2. Nitrogen loss from karst area in China in recent 50 years: An in-situ simulated rainfall experiment's assessment.

    Science.gov (United States)

    Song, Xianwei; Gao, Yang; Green, Sophie M; Dungait, Jennifer A J; Peng, Tao; Quine, Timothy A; Xiong, Bailian; Wen, Xuefa; He, Nianpeng

    2017-12-01

    Karst topography covers more than 1/3 of the People's Republic of China in area. The porous, fissured, and soluble nature of the underlying karst bedrock (primarily dolomite and limestone) leads to the formation of underground drainage systems. Karst conduit networks dominate this system, and rainfall takes a crucial role on water cycle at China karst area. Nitrogen loss from the karst system is of particular concern, with regard to nutrient use efficiency as well as water quality, as much of the karst system, including steeply sloping terrain, is used for intensive agriculture. We use simulated rainfall experiments to determine the relationship between rainfall and nitrogen loss at typical karst slope land and then estimate nitrogen loss from the karst soil. The results show that both surface runoff and subsurface runoff have a significant linear correlation with rainfall at all studied sites. Subsurface runoff is larger than surface runoff at two karst sites, while the opposite is true at the non-karst site. Exponential function satisfactorily described the correlation between rainfall and nitrogen concentrations in runoff. Nitrates accounted for 60%-95% of the dissolved nitrogen loss (DN, an index of N-loss in this research). The estimated annual N-loss load varies between 1.05 and 1.67 Tg N/year in the whole karst regions of China from 1961 to 2014. Approximately, 90% of the N-loss load occurred during the wet season, and 90% of that passed through the subsurface. Understanding the processes and estimating N-loss is highly valuable in determining long-term soil security and sustainability in karst regions.

  3. O Tribunal de Contas da União (TCU e a gestão ambiental brasileira: experiência recente

    Directory of Open Access Journals (Sweden)

    Luiz Henrique Moraes de Lima

    Full Text Available A Constituição de 1988 ampliou a esfera de competência do Tribunal de Contas da União (TCU, assegurando-lhe maior poder de atuação, inclusive na área ambiental. A partir de 1998, com a definição de sua estratégia de atuação nessa área, e de forma crescente, o TCU vem desempenhando um importante papel na avaliação das políticas ambientais públicas do governo federal. A realização de diversas auditorias operacionais em instituições e programas governamentais têm resultado em minuciosos diagnósticos e relevantes recomendações, no sentido de tornar mais efetivas as políticas públicas ambientais. Este estudo descreve e comenta a evolução da fiscalização do TCU sobre a gestão ambiental brasileira nos últimos anos. Também é lembrada a atuação de entidades de fiscalização superiores de outros países na área ambiental. São analisados os critérios da estratégia de atuação ambiental do Tribuna de Contas, bem como as determinações e recomendações de algumas recentes deliberações envolvendo a gestão de recursos hídricos, o licenciamento ambiental e a avaliação ambiental estratégica. Este artigo procura relacionar a atuação do TCU na área ambiental com a busca por um controle preventivo, pedagógico e orientador da gestão pública, em substituição ao tradicional modelo de controle formalista e a posteriori. O artigo conclui que a atuação do tribunal é positiva para a sociedade, recomendando que seja ampliada.

  4. Cosmogenic activation: Recent results

    Science.gov (United States)

    Kudryavtsev, Vitaly A.

    2018-01-01

    Activation of materials is known to cause background events in underground experiments that may affect the sensitivity of these experiments to rare event searches. The most common source of activation is the exposure of materials to cosmic rays at the surface of the Earth but other various sources of neutrons may also be dangerous. Different computer codes provide estimates of production rates of radioactive isotopes due to activation but their results are sometimes inconsistent. High-sensitivity experiments looking for dark matter, neutrino-less double-beta decay or neutrinos from various sources, although affected by activation, provide crucial tests of models used in the codes. Recent calculations and measurements of activation rates are discussed in this paper.

  5. Recent Experiences with Severe and Cerebral Malaria

    African Journals Online (AJOL)

    1974-06-29

    Jun 29, 1974 ... Malaria admissions. Cerebral malaria ... Cerebral signs. Haemoglobin below 10 g/100 ml (not all tested). Enlarged tender liver or jaundice, or both ... articl~ by H. Smitskamp and F. H. Wolthuis entitled 'New concepts in treatment of malaria with malignant tertian cerebral involvement' which appeared in the ...

  6. Recent results from the G0 experiment

    International Nuclear Information System (INIS)

    Real, J.S.; Androic, D.; Armstrong, D.S.; Arvieux, J.; Bailey, S.L.; Beck, D.H.; Beise, E.J.; Benesch, J.; Benmokhtar, F.; Bimbot, L.; and others

    2010-01-01

    We have measured parity violating asymmetries in elastic electron-proton and quasi-elastic electron-deuteron scattering at backward electron angle. These measurements have been done at two momentum transfers: Q2 = 0.22 and 0.63 (GeV/c)2. Together with our previous forward angle measurement, we can extract strange quark contributions to the electromagnetic form factors of the nucleon, as well as nucleon axial form factor coming from the neutral weak interaction. The results indicate a strange quark magnetic contribution close to zero at these Q2, and a possible non zero strange quark electric contribution for the high Q2 . The first Q2 behavior measurement of the nucleon axial form factor in elastic electron scattering shows a good agreement with radiative corrections calculated at Q2 = 0 and with a dipole form using the axial mass determined in neutrino scattering.

  7. Recent results from the AMS-02 experiment

    Directory of Open Access Journals (Sweden)

    Vecchi Manuela

    2015-01-01

    Full Text Available The AMS-02 detector is a large acceptance magnetic spectrometer operating onboard the International Space Station since May 2011. The main goals of the detector are the search for antimatter and dark matter in space, as well as the measurement of cosmic ray composition and flux. Precise measurements of cosmic ray positrons and electrons are presented in this document, based on 41×109 events collected during the first 30 months of operations.

  8. Recent solvent extraction experience at Savannah River

    International Nuclear Information System (INIS)

    Gray, L.W.; Burney, G.A.; Gray, J.H.; Hodges, M.E.; Holt, D.L.; Macafee, I.M.; Reif, D.J.; Shook, H.E.

    1986-01-01

    Tributyl phosphate-based solvent extraction processes have been used at Savannah River for more than 30 years to separate and purify thorium, uranium, neptunium, plutonium, americium, and curium isotopes. This report summarizes the advancement of solvent extraction technology at Savannah River during the 1980's. Topics that are discussed include equipment improvements, solvent treatment, waste reduction, and an improved understanding of the various chemistries in the process streams entering, within, and leaving the solvent extraction processes

  9. Recent results in the DIVA experiment

    International Nuclear Information System (INIS)

    1978-03-01

    Divertor effects have been studied over a wide range of plasma parameters: electron temperature T sub(eo) = 200 - 700 eV, ion temperature T sub(io) = 60 - 300 eV and density n sub(eo) = (1.5 - 8.0) x 10 13 cm -3 in the main plasma, and T sub(es) = 20 - 100 eV, T sub(is) = 20 - 60 eV and n sub(es) = (1.5 - 5.0) x 10 12 cm -3 in the scrape-off layer plasma. The following results are obtained. 1) The divertor reduces plasma-wall interactions near the main plasma by guiding loss plasma into the divertor chamber. A maximum divertor efficiency is 35% for particle flux and 75% for heat flux. 2) The scrape-off layer plasma shields impurity influx, guides ionized impurities into the divertor, and reduces influx of injected impurities into the main plasma by a factor of 2 - 4. Shielding efficiency is higher for aluminum than for carbon. Shielding effect is also observed in a conventional discharge. 3) The divertor reduces radiation loss by a factor of 2 - 4 and hence increases the energy-confinement time by a factor of 2.5. 4) The divertor does not significantly affect particle-confinement time, ion temperature and heat diffusion coefficient. 5) The radiation loss due to pseudo continuum mainly from gold ions is comparable to that due to oxygen lines. Impurity confinement time is comparable to the average particle-confinement time. 6) The particle flow velocity is a few times less than the sound velocity, the heat transmission rate is consistent with a sheath model, and the particle diffusion coefficient in the scrape-off layer is about ten times less than the Bohm diffusion coefficient. Scaling for electron temperature is obtained. 7) Ion sputtering, arcing and evaporation are identified. The ion sputtering by impurity ions is the dominant process of metallic impurity release from a limiter or a neutralizer plate in a stable discharge. (J.P.N.)

  10. Health care financing: recent experience in Africa.

    Science.gov (United States)

    Dunlop, D W

    1983-01-01

    The economic realities of health sector development in Africa has been analyzed in this paper. Both the global and national macroeconomic context has been defined. Given the available data, it is clear that most African countries face increasingly serious economic realities, such as slow or even declining economic growth (per capita), a depressed food production situation, severe balance of payments crises, and increasing dependence on external financial assistance. Given the limited but increasingly available 1981 and 1982 data, the economic situation in many countries is more constrained than those indicated by the data contained in this paper. In this context, the potential competitive situation facing governmental health care systems was reviewed. In addition, the diversity in the sources of health expenditures between countries in Africa was highlighted. These data provide clear evidence that governments clearly do not finance the entire health care system and that individual payment for service in many countries represent an important source of revenue for many care providers in various health care systems operating in any given country. The potential for governments to finance either an expansion of or improvements to the government component of their health care systems is then reviewed. The highlights of this analysis include the following points. First, the tax structure in many African countries is highly dependent on export and import duties, which in turn creates dependency on sustained foreign demand for exports.(ABSTRACT TRUNCATED AT 250 WORDS)

  11. Recent progress in Large Helical Device experiments

    Energy Technology Data Exchange (ETDEWEB)

    Komori, A.; Morisaki, T.; Mutoh, T.; Sakakibara, S.; Takeiri, Y.; Kumazawa, R.; Kubo, S.; Ida, K.; Morita, S.; Narihara, K.; Shimozuma, T.; Tanaka, K.; Watanabe, K. Y.; Yamada, H.; Yoshinuma, M.; Akiyama, T.; Ashikawa, N.; Beidler, C. D.; Emoto, M.; Fujita, T.

    2005-07-01

    In order to realize the thermonuclear fusion reactor some critical issues to be solved are underlying in our path. The steady state operation with high confinement performance is known to be essential for the purpose. From the view point of economic feasibility, the high beta operation is favorable for the reduction of the construction cost. However compatibility between good confinement and high beta plasma is an important issue for the helical devices. When the plasma shifts outward with an increasing in beta, confinement degradation takes place because orbit of helically trapped particles drifts from the magnetic flux surfaces [1,2]. The restrict of the plasma shift is possible and valid for high-beta plasma production, to be sure, while it is important to investigate the beta-limit determined by the magnetohydrodynamics (MHD) equilibrium and stability, which is an essential subject to repress the confinement degradation due to other causes. (Author)

  12. Recent experiences with independent power projects

    International Nuclear Information System (INIS)

    Kline, R.H.; Fitzowitch, J.R.; Dalla-Longa, L.

    1999-01-01

    New opportunities are making it possible to develop independent power projects involving partnerships with the electric power industry, and the petroleum and natural gas industry . This paper described those opportunities, the impediments and the risks involved. Mercury Electric Corp. has been involved in power projects at remote gas field and oil field sites where they use of a turbogenerator which runs on flare gas to generate electricity. TransCanada Power's involvement in independent power projects includes the supply and transport of gas and their ability to provide gas fired combined cycle technology. They are involved in a project at Hermiston, Oregon and also in a cogeneration project in Medicine Hat, Alberta. The CanCarb City of Medicine Hat project makes use of waste heat at an industrial facility. 11 figs

  13. Recent results from LHCf

    Directory of Open Access Journals (Sweden)

    Menjo H.

    2015-01-01

    Full Text Available The LHCf experiment is one of the LHC forward experiments. The aim of LHCf is to provide critical calibration data of hadronic intraction models used in air shower simulations. The LHCf has completed the operations for p-p collisions with a collision energy of √s = 0.9 and 7 TeV p-p in 2010 and for p-Pb collisions with a collision energy per nucleon of √sNN = 5.02. The recent LHCf result of forward neutron energy spectra at 7 TeV p-p collision and forward π0 spectra at p-Pb collisions are presented in this paper.

  14. Recent results from CMS

    CERN Multimedia

    CERN. Geneva

    2016-01-01

    With the increase in center-of-mass energy, a new energy frontier has been opened by the Large Hadron Collider. More than 25 fb^-1 of proton-proton collisions at sqrt(s)=13 TeV have been delivered to both ATLAS and CMS experiments during 2016. This enormous dataset can be used to test the Standard Model in a complete new regime with tremendous precision and it has the potential to unveil new physics or set strong bounds on it. In this talk some of the most recent results made public by the CMS Collaboration will be presented. The focus will mainly be on searches for physics beyond the Standard Model, with particular emphasis on searches for dark matter candidates.

  15. Jefferson Lab physics overview: Recent results

    International Nuclear Information System (INIS)

    I review highlights of the Jefferson Lab nucleon structure program. I shall emphasize recent results from experiments exploring the spin structure of the nucleon and from dedicated experiments aimed at accessing the generalized parton distributions (GPDs).

  16. In search of late time evolution self-similar scaling laws of Rayleigh-Taylor and Richtmyer-Meshkov hydrodynamic instabilities - recent theorical advance and NIF Discovery-Science experiments

    Science.gov (United States)

    Shvarts, Dov

    2017-10-01

    Hydrodynamic instabilities, and the mixing that they cause, are of crucial importance in describing many phenomena, from very large scales such as stellar explosions (supernovae) to very small scales, such as inertial confinement fusion (ICF) implosions. Such mixing causes the ejection of stellar core material in supernovae, and impedes attempts at ICF ignition. The Rayleigh-Taylor instability (RTI) occurs at an accelerated interface between two fluids with the lower density accelerating the higher density fluid. The Richtmyer-Meshkov (RM) instability occurs when a shock wave passes an interface between the two fluids of different density. In the RTI, buoyancy causes ``bubbles'' of the light fluid to rise through (penetrate) the denser fluid, while ``spikes'' of the heavy fluid sink through (penetrate) the lighter fluid. With realistic multi-mode initial conditions, in the deep nonlinear regime, the mixing zone width, H, and its internal structure, progress through an inverse cascade of spatial scales, reaching an asymptotic self-similar evolution: hRT =αRT Agt2 for RT and hRM =αRM tθ for RM. While this characteristic behavior has been known for years, the self-similar parameters αRT and θRM and their dependence on dimensionality and density ratio have continued to be intensively studied and a relatively wide distribution of those values have emerged. This talk will describe recent theoretical advances in the description of this turbulent mixing evolution that sheds light on the spread in αRT and θRM. Results of new and specially designed experiments, done by scientists from several laboratories, were performed recently using NIF, the only facility that is powerful enough to reach the self-similar regime, for quantitative testing of this theoretical advance, will be presented.

  17. An Undergraduate Research Experience that Integrates Traditional Field Mapping, LiDAR, and 3D Numerical Modeling: Applying Lessons from a Recent Report from the National Academies of Sciences, Engineering, and Medicine in an Intermediate-Level Tectonic Landscapes Course

    Science.gov (United States)

    Reinen, L. A.; Brenner, K.

    2017-12-01

    Ongoing efforts to improve undergraduate education in science, technology, engineering, and mathematics (STEM) fields focus on increasing active student participation and decreasing traditional lecture-based teaching. Undergraduate research experiences (UREs), which engage students in the work of STEM professionals, are an example of these efforts. A recent report from the National Academies of Sciences, Engineering and Medicine (Undergraduate Research Experiences for STEM Students: Successes, Challenges, and Opportunities; 2017) provides characteristics of UREs, and indicates that participation in UREs increases student interest and persistence in STEM as well as provides opportunities to broaden student participation in these fields. UREs offer an excellent opportunity to engage students in research using the rapidly evolving technologies used by STEM professionals. In the fall of 2016, students in the Tectonic Landscapes class at Pomona College participated in a course-based URE that combined traditional field mapping methods with analysis of high-resolution topographic data (LiDAR) and 3D numerical modeling to investigate questions of active local faulting. During the first ten weeks students developed skills in: creation of fault maps from both field observations (GPS included) and high-resolution digital elevation models (DEMs), assessment of tectonic activity through analyses of DEMs of hill slope diffusion models and geomorphic indices, and evaluation of fault geometry hypotheses via 3D elastic modeling. Most of these assignments were focused on a single research site. While students primarily used Excel, ArcMap, and Poly3D, no previous knowledge of these was required or assumed. Through this iterative approach, students used increasingly more complex methods as well as gained greater ownership of the research process with time. The course culminated with a 4-week independent research project in which each student investigated a question of their own

  18. Recent lung imaging studies

    International Nuclear Information System (INIS)

    Taplin, G.V.; Chopra, S.K.

    1976-01-01

    Radionuclide lung imaging procedures have been available for 11 years but only the perfusion examination has been used extensively and mainly for the diagnosis of pulmonary embolism (P.E.). Its ability to reveal localized ischemia makes it a valuable test of regional lung function as well as a useful diagnostic aid in P.E. Although it had been recognized for several years that chronic obstructive pulmonary disease (COPD) can cause lung perfusion defects which may simulate pulmonary embolism, relatively little use has been made of either the radioxenon or the radioaerosol inhalation lung imaging procedures until the last few years as a means of distinguishing P.E. from COPD. In this review emphasis is placed on our recent experience with both of these inhalation procedures in comparison with pulmonary function tests and roentgenography for the early detection of COPD in population studies. Equal emphasis is given to simultaneous aerosol ventilation-perfusion (V/P) imaging for a functional diagnosis of P.E. Two new developments in regional lung diffusion imaging, performed after the inhalation of radioactive gases and/or rapidly absorbed radioaerosols are described. The experimental basis for their potential clinical application in pulmonary embolism detection is presented

  19. Recent crustal movements

    Science.gov (United States)

    Maelzer, H.

    Calculation of temporal height changes for the determination of recent vertical crustal movements in northern, western, and southern Germany is described. Precise geodetic measurements and their analysis for the determination of recent crustal movements in north-eastern Iceland, western Venezuela, and central Peru are described. Determination of recent vertical crustal movements by leveling and gravity data; geodetic modeling of deformations and recent crustal movements; geodetic modeling of plate motions; and instrumental developments in geodetic measuring are discussed.

  20. BEAM EMITTANCE MEASUREMENT TOOL FOR CEBAF OPERATIONS

    International Nuclear Information System (INIS)

    Chevtsov, Pavel; Tiefenback, Michael

    2008-01-01

    A new software tool was created at Jefferson Lab to measure the emittance of the CEBAF electron beams. The tool consists of device control and data analysis applications. The device control application handles the work of wire scanners and writes their measurement results as well as the information about accelerator settings during these measurements into wire scanner data files. The data analysis application reads these files and calculates the beam emittance on the basis of a wire scanner data processing model. Both applications are computer platform independent but are mostly used on LINUX PCs recently installed in the accelerator control room. The new tool significantly simplifies beam emittance measurement procedures for accelerator operations and contributes to a very high availability of the CEBAF machine for the nuclear physics program at Jefferson Lab.

  1. Recent SUSY Results from CMS

    CERN Multimedia

    CERN. Geneva

    2012-01-01

    We present a summary of the recent results of searches for supersymmetry conducted by the CMS experiment. Several searches are reported using complementary final states and methods. The results presented include searches for stops and sbottoms, production of charginos and neutralinos, and R-parity violating signatures. Several of them are the first results of their kind from CMS, while others increased the mass reach significantly over previously published results from the LHC.

  2. Recent advances in dental implants

    OpenAIRE

    Hong, Do Gia Khang; Oh, Ji-hyeon

    2017-01-01

    Dental implants are a common treatment for the loss of teeth. This paper summarizes current knowledge on implant surfaces, immediate loading versus conventional loading, short implants, sinus lifting, and custom implants using three-dimensional printing. Most of the implant surface modifications showed good osseointegration results. Regarding biomolecular coatings, which have been recently developed and studied, good results were observed in animal experiments. Immediate loading had similar c...

  3. Directed Forgetting of Recently Recalled Autobiographical Memories

    Science.gov (United States)

    Barnier, Amanda J.; Conway, Martin A.; Mayoh, Lyndel; Speyer, Joanne; Avizmil, Orit; Harris, Celia B.

    2007-01-01

    In 6 experiments, the authors investigated list-method directed forgetting of recently recalled autobiographical memories. Reliable directed forgetting effects were observed across all experiments. In 4 experiments, the authors examined the impact of memory valence on directed forgetting. The forget instruction impaired recall of negative,…

  4. Beam-Profile Instrumentation for a Beam-Halo Measurement Overall Description, Operation, and Beam Data

    CERN Document Server

    Gilpatrick, J D; Day, L; Kerstiens, D; Stettler, M; Valdiviez, R

    2001-01-01

    The halo experiment presently being conducted at the Low Energy Demonstration Accelerator (LEDA) at Los Alamos National Laboratory (LANL) has specific instruments that acquire horizontally and vertically projected particle-density beam distributions out to greater than 105:1 dynamic range. We measure the core of the distributions using traditional wire scanners, and the tails of the distribution using water-cooled graphite scraping devices. The wire scanner and halo scrapers are mounted on the same moving frame whose location is controlled with stepper motors. A sequence within the Experimental Physics and Industrial Control System (EPICS) software communicates with a National Instrument LabVIEW virtual instrument to control the movement and location of the scanner/scraper assembly. Secondary electrons from the wire scanner 33 μm carbon wire and protons impinging on the scraper are both detected with a lossy-integrator electronic circuit. Algorithms implemented within EPICS and in Research Systems Interactiv...

  5. ATLAS @ LHC: status and recent results

    CERN Document Server

    McPherson, Robert; The ATLAS collaboration

    2017-01-01

    The status and data taking summary of the ATLAS experiment at the CERN Large Hadron Collider is reviewed. Recent physics analysis results are presented, and the detector upgrade program is briefly summarized.

  6. Recent Case Law

    DEFF Research Database (Denmark)

    Petz, Thomas; Sagaert, Vincent; Østergaard, Kim

    2004-01-01

    In this section authors from various European countries report the recent case law in their country on the field of private patrimonial law, that is decisions on the law of property, juridical acts, the law of obligations, contract law and prescription. The European Review of Private Law (ERPL......) started this section in 2003. The section aims to give our readers an overview of what is happening in the most recent European case law. We have asked the national reporters to report the juridical essence of the decisions given by the highest courts in their country. These national reports...... not relate the facts of the decision, nor the personal opinion of the reporter. One can find discussions on the most important decisions of European courts in ERPL’s case note section. The recent case law section gives overviews of decisions published in periods of four months. The period of January...

  7. Recent diagnostic developments on LHD

    International Nuclear Information System (INIS)

    Sudo, S; Ozaki, T; Ashikawa, N; Emoto, M; Goto, M; Hamada, Y; Ida, K; Ido, T; Iguchi, H; Inagaki, S; Isobe, M; Kawahata, K; Khlopenkov, K; Kobuchi, T; Liang, Y; Masuzaki, S; Minami, T; Morita, S; Muto, S; Nagayama, Y; Nakanishi, H; Narihara, K; Nishizawa, A; Ohdachi, S; Osakabe, M; Peterson, B J; Sakakibara, S; Sasao, M; Sato, K; Shoji, M; Tamura, N; Tanaka, K; Toi, K; Tokuzawa, T; Watanabe, K; Watanabe, T; Yamada, I; Goncharov, P; Ejiri, A; Okajima, S; Mase, A; Tsuji-Iio, S; Akiyama, T; Lyon, J F; Vyacheslavov, L N; Sanin, A

    2003-01-01

    The recent diagnostic developments on the large helical device (LHD) are described briefly. LHD is the largest helical machine with all superconducting coils, and its purpose is to prove the ability of a helical system to confine a fusion-relevant plasma in steady state. According to the missions of LHD research, the diagnostic devices are categorized as follows: diagnostics for (i) high nτ E T plasmas and transport physics; (ii) magnetohydrodynamic stability; (iii) long pulse operation and divertor function; and (iv) energetic particles. These are briefly described focusing on the recent developments of the devices. Since the LHD experiment started in March 1998, five series of experimental campaigns have been carried out. The LHD diagnostics during these periods were operated successfully, and contributed to the analysis of the experimental results

  8. Recent diagnostic developments on LHD

    Energy Technology Data Exchange (ETDEWEB)

    Sudo, S; Ozaki, T; Ashikawa, N; Emoto, M; Goto, M; Hamada, Y; Ida, K; Ido, T; Iguchi, H; Inagaki S; Isobe, M; Kawahata, K; Khlopenkov, K; Kobuchi, T; Liang, Y; Masuzaki, S; Minami, T; Morita, S; Muto, S; Nagayama, Y; Nakanishi, H; Narihara, K; Nishizawa, A; Ohdachi, S; Osakabe, M; Peterson, BJ; Sakakibara, S; Sasao, M; Sato, K; Shoji, M; Tamura, N; Tanaka, K; Toi, K; Tokuzawa, T; Watanabe, K; Watanabe, T; Yamada, I [National Institute for Fusion Science, Toki 509-5292 (Japan); Goncharov, P [Grad. Univ. Advanced Studies, Oroshi-cho 322-6, Toki 509-5292 (Japan); Ejiri, A [University of Tokyo, Tokyo 113-0033 (Japan); Okajima, S [Chubu University, Kasugai-shi, 487-8501 (Japan); Mase, A [Kyushu University, Kasuga, 816-8580 (Japan); Tsuji-Iio, S [Tokyo Institute of Technology, Meguro-ku, Tokyo 152-8550 (Japan); Akiyama, T [Tokyo Institute of Technology, Meguro-ku, Tokyo 152-8550 (Japan); Lyon, J F [Oak Ridge National Laboratory, Oak Ridge, TN 37831-8072 (United States); Vyacheslavov, L N [Budker Institute of Nuclear Physics, 630090, Novosibirsk (Russian Federation); Sanin, A [Budker Institute of Nuclear Physics, 630090, Novosibirsk (Russian Federation)

    2003-07-01

    The recent diagnostic developments on the large helical device (LHD) are described briefly. LHD is the largest helical machine with all superconducting coils, and its purpose is to prove the ability of a helical system to confine a fusion-relevant plasma in steady state. According to the missions of LHD research, the diagnostic devices are categorized as follows: diagnostics for (i) high n{tau}{sub E}T plasmas and transport physics; (ii) magnetohydrodynamic stability; (iii) long pulse operation and divertor function; and (iv) energetic particles. These are briefly described focusing on the recent developments of the devices. Since the LHD experiment started in March 1998, five series of experimental campaigns have been carried out. The LHD diagnostics during these periods were operated successfully, and contributed to the analysis of the experimental results.

  9. Recent results from the Tevatron

    Energy Technology Data Exchange (ETDEWEB)

    Vellidis, Costas; Bravina, L.; Foka, Y.; Kabana, S.

    2015-01-01

    The Tevatron p$\\bar{p}$ collider was shut down in 2011, after 10 years of high performance operation at a center-of-mass energy √s = 1.96 TeV in Run II. The two experiments, CDF and DZero, continue to analyze the collected data, aiming to extract all possible information regarding studies of the standard model and searches for new physics. A short review of some of the recent measurements at the Tevatron, and of the impact of the Tevatron program to high energy physics, is presented.

  10. Recent results from Jefferson Lab

    International Nuclear Information System (INIS)

    Volker D. Burkert

    1999-01-01

    Recent results on studies of the structure of nucleons and nuclei in the regime of strong interaction QCD are discussed. Use of high current polarized electron beams, polarized targets, and recoil polarimeters, in conjunction with modern spectrometers and detector instrumentation allow much more detailed studies of nucleon and nuclear structure than has been possible in the past. The CEBAF accelerator at Jefferson Lab was build to study the internal structure of hadrons in a regime where confinement is important and strong interaction QCD is the relevant theory. They author discusses how the first experiments already make significant contributions towards an improved understanding of hadronic structure

  11. Recent Results from Jefferson Lab

    International Nuclear Information System (INIS)

    Volker Burkert

    2000-03-01

    Recent results on studies of the structure of nucleons and nuclei in the regime of strong interaction QCD are discussed. Use of high current polarized electron beams, polarized targets, and recoil polarimeters, in conjunction with modern spectrometers and detector instrumentation allow much more detailed studies of nucleon and nuclear structure than has been possible in the past. The CEBAF accelerator at Jefferson Lab was built to study the internal structure of hadrons in a regime where confinement is important and strong interaction QCD is the relevant theory. I discuss how the first experiments already make significant contributions towards an improved understanding of hadronic structure

  12. Recent CMS B physics results

    CERN Document Server

    Polikarpov, Sergey

    2017-01-01

    Various recent CMS B physics results are reported, including measurement of B hadron lifetimes; observation of $\\Upsilon\\mathrm{(1S)}$ pair production; angular analysis of the rare decay $\\mathrm{B}^0\\rightarrow\\mathrm{K}^{*0}\\mu^{+}\\mu^{-}$; search for X(5568) state. All analyses are performed using data collected by the CMS experiment at the LHC in pp collisions at $\\sqrt{s}=8$\\,TeV, which corresponds to an integrated luminosity of about $20\\,\\mathrm{fb}^{-1}$.

  13. Recent results from Heliotron J

    International Nuclear Information System (INIS)

    Sano, F.; Mizuuchi, T.; Nagasaki, K.

    2003-01-01

    Recent 70-GHz, 0.4-MW ECH experiments in Heliotron J have revealed the existence of the spontaneous confinement transition, like that of H-mode, at rather low threshold line-averaged densities of 1.2-1.6 x 10 19 m -3 . The transition was discovered in two edge iota windows: one is 0.54<ι(a)/2π<0.56 at separatrix discharge plasmas and the other is 0.62<ι(a)/2π<0.63 at partial wall-limiter plasmas. The energy confinement time for the separatrix discharge plasmas was found to be enhanced beyond the normal ISS95 scaling in the transient H-mode phase, being 50% better than that in the ''before transition'' phase. The bootstrap current properties, ECCD experiments and the initial 0.7-MW NBI H-mode characteristics are also discussed. (orig.)

  14. Recent developments: Industry briefs

    International Nuclear Information System (INIS)

    Anon.

    1992-01-01

    This is the February 1992 'Industry Briefs' portion of the 'Recent Developments' section. Issues mentioned are: (1) closure of San Onofre Unit 1, (2) start-up of Penly Unit 2, (3) signing of a safeguards agreement with North Korea, (4) Canadian nuclear activities in Romania, and (5) the merger of two Japanese fuel cycle companies

  15. Recent results from LEP

    Indian Academy of Sciences (India)

    The major goals of LEP2 are precision measurement of the mass and width of theW boson and search for new particles such as ... Recent results from LEP. Selection strategy: • Exclude hadronic events using multiplicity. • Identify 2 leptons (e, μ, tagging as at LEP I). • Apply selection cuts on. – acoplanarity angle between the ...

  16. Recent results from LEP

    Indian Academy of Sciences (India)

    Recent results from the LEP collider at CERN are presented: on the identification of +- → +- and the determination of the mass and width and limits on its anomalous couplings; the search for the Standard Model and non-minimal Higgs; search for SUSY and other new particles. Fits to all electroweak data leading to ...

  17. Recent progress in Biophysics

    International Nuclear Information System (INIS)

    Bemski, G.

    1980-03-01

    Recent progress in biophysics is reviewed, and three examples of the use of physical techniques and ideas in biological research are given. The first one deals with the oxygen transporting protein-hemoglobin, the second one with photosynthesis, and the third one with image formation, using nuclear magnetic resonance. (Author) [pt

  18. Biofuel technologies. Recent developments

    Energy Technology Data Exchange (ETDEWEB)

    Gupta, Vijai Kumar [National Univ. of Ireland Galway (Ireland). Dept. of Biochemistry; MITS Univ., Rajasthan (India). Dept. of Science; Tuohy, Maria G. (eds.) [National Univ. of Ireland Galway (Ireland). Dept. of Biochemistry

    2013-02-01

    Written by experts. Richly illustrated. Of interest to both experienced researchers and beginners in the field. Biofuels are considered to be the main potential replacement for fossil fuels in the near future. In this book international experts present recent advances in biofuel research and related technologies. Topics include biomethane and biobutanol production, microbial fuel cells, feedstock production, biomass pre-treatment, enzyme hydrolysis, genetic manipulation of microbial cells and their application in the biofuels industry, bioreactor systems, and economical processing technologies for biofuel residues. The chapters provide concise information to help understand the technology-related implications of biofuels development. Moreover, recent updates on biofuel feedstocks, biofuel types, associated co- and byproducts and their applications are highlighted. The book addresses the needs of postgraduate researchers and scientists across diverse disciplines and industrial sectors in which biofuel technologies and related research and experimentation are pursued.

  19. Recent applications of SUPERFISH

    International Nuclear Information System (INIS)

    Gluckstern, R.L.; Neri, F.

    1988-01-01

    The program, SUPERFISH, obtains the frequencies and fields for azimuthally symmetric TM or TE modes in azimuthally symmetric cavities. The r-z plane is covered by a triangular mesh and the resulting difference equations for the field component H/sub phi/(TM) or E/sub phi/(TE) at the vertices of the mesh solved by direct matrix inversion. In the present paper, we describe a number of recent modifications of SUPERFISH

  20. Recent progress in microcalorimetry

    CERN Document Server

    Calvet, E; Skinner, H A

    2013-01-01

    Recent Progress in Microcalorimetry focuses on the methodologies, processes, and approaches involved in microcalorimetry, as well as heat flow, temperature constancy, and chemistry of alumina and cements.The selection first offers information on the different types of calorimeters; measurement of the heat flow between the calorimeter and jacket boundaries by means of a thermoelectric pile; and constructional details of the microcalorimeter. Discussions focus on classification of calorimeters, use of thermoelectric piles as thermometers, correct measurement of heat flow from a calorimeter conta

  1. Hydrophilic Carotenoids: Recent Progress

    Directory of Open Access Journals (Sweden)

    Attila Agócs

    2012-04-01

    Full Text Available Carotenoids are substantially hydrophobic antioxidants. Hydrophobicity is this context is rather a disadvantage, because their utilization in medicine as antioxidants or in food chemistry as colorants would require some water dispersibility for their effective uptake or use in many other ways. In the past 15 years several attempts were made to synthetize partially hydrophilic carotenoids. This review compiles the recently synthetized hydrophilic carotenoid derivatives.

  2. Silicene: Recent theoretical advances

    KAUST Repository

    Lew Yan Voon, L. C.

    2016-04-14

    Silicene is a two-dimensional allotrope of silicon with a puckered hexagonal structure closely related to the structure of graphene and that has been predicted to be stable. To date, it has been successfully grown in solution (functionalized) and on substrates. The goal of this review is to provide a summary of recent theoretical advances in the properties of both free-standing silicene as well as in interaction with molecules and substrates, and of proposed device applications.

  3. Recent results from LHCb

    CERN Document Server

    Oblakowska-Mucha, A

    2016-01-01

    The LHCb detector is a single-arm forward spectrometer that collects data at the LHC. In this review, a few of recent results in the field of $b$-hadron decays performed by the LHCb Collaboration are presented. The analyses use proton-proton collision data corresponding to 3 fb$^{-1}$ collected by the LHCb detector during 2011 and 2012 physics runs with the center-of-mass energies of 7 and 8 TeV.

  4. Recent developments: Industry briefs

    International Nuclear Information System (INIS)

    Anon.

    1990-01-01

    Recent nuclear industry briefs are presented. These briefs include: Swiss voters reject phaseout; EdF confirms order for Civaux 1; NDP surprise victor in Ontario; Czechoslovakia joins Foratom; Poland abandons Zarnowiec; Cogema's UP3 facility operationa; Wismut to clsoe mining operations; court rules in favor of US government in Yucca Mountain waste site; Italian government ratifies ENEL reactor shutdowns; and Seabrook enters commercial operation

  5. Semiconductor detectors. Recent evolution

    International Nuclear Information System (INIS)

    Siffert, P.

    1977-01-01

    The recent evolution as well as the problems appearing in the use of semiconductor counters in both X and γ-ray as well as heavy ions spectroscopy are reviewed. For the photon counters the discussion is limited to cadmium telluride and mercuric iodide room temperature diodes, whereas for heavy ions, identification by means of thin ΔE/Δx counters and some problems related to the pulse amplitude in E detectors are considered [fr

  6. Recent developments: Industry briefs

    International Nuclear Information System (INIS)

    Anon.

    1992-01-01

    This article is the 'Industry Briefs' portion of Nuexco's July 1992 'Recent Developments' section. Specific items mentioned include: (1) the merger of Entergy and Gulf States Utilities, (2) restart of the Sequoyah Fuels facility in Oklahoma, (3) development of the 7th and 8th nuclear units in Taiwan, (4) purchase of interest in Rio Algom, Ltd, and (5) acquisition of the Italian firm AGIP by a Canadian company

  7. Recent developments in biodosimetry

    International Nuclear Information System (INIS)

    Trivedi, A.; Greenstock, C.L.

    1995-08-01

    This report reviews recent developments in biodosimetry (1989-1993), and presents a comparative study of the existing techniques and their future prospects. The report summarizes the sensitivity, reproducibility, limiting dose, dose-rate, energy, linear energy transfer (LET) responses, sources of variability and uncertainty, and other practical aspects of each bio-indicator. The strengths and weaknesses of each approach are evaluated on the basis of a set of common criteria for particular applications. (author). 155 refs., 15 tabs

  8. Chile; Recent Economic Developments

    OpenAIRE

    International Monetary Fund

    1996-01-01

    This paper examines the sources of growth in Chile and compares Chile’s experience with that of other countries. Two alternative measures of the sources of growth for Chile are presented to facilitate comparisons with other studies. The first measure adjusts factor inputs for the degree of utilization (using the unemployment rate), and the second measure introduces an index of the quality of factor inputs. The paper presents estimates of potential output of Chile for 1971–95, and also discuss...

  9. Recent highlights from STAR

    Science.gov (United States)

    Zha, Wangmei

    2018-02-01

    The Solenoidal Tracker at RHIC (STAR) experiment takes advantage of its excellent tracking and particle identification capabilities at mid-rapidity to explore the properties of strongly interacting QCD matter created in heavy-ion collisions at RHIC. The STAR collaboration presented 7 parallel and 2 plenary talks at Strangeness in Quark Matter 2017 and covered various topics including heavy flavor measurements, bulk observables, electro-magnetic probes and the upgrade program. This paper highlights some of the selected results.

  10. Comparison of the cladding deformation measured during the Power Burst Facility loss-of-coolant accident in-pile experiments with recent Oak Ridge National Laboratory out-of-pile results

    International Nuclear Information System (INIS)

    Broughton, J.M.; McCardell, R.K.; MacDonald, P.E.

    1981-01-01

    A series of four large break loss-of-coolant accident fuel behavior experiments have been performed in the Power Burst Facility. The results of these experiments are briefly reviewed and compared with results from the ORNL multirod burst test program. The effect of cladding burst temperature and prior irradiation were investigated. The cladding strain of the previously irradiated test rods was more uniformly distributed around the cladding circumference and larger than for similar unirradiated test rods. The ORNL out-of-pile single rod test results are in good agreement with the Power Burst Facility (PBF) test results with unirradiated test rods, and the ORNL out-of-pile, single-rod test results with heated shrouds and the PBF test results with previously irradiated test rods are comparable

  11. NAUTILUS recent results

    Science.gov (United States)

    Fafone, V.; Astone, P.; Bassan, M.; Bonifazi, P.; Carelli, P.; Coccia, E.; D'Antonio, S.; Federici, G.; Marini, A.; Minenkov, Y.; Modena, I.; Modestino, G.; Moleti, A.; Pallottino, G. V.; Pizzella, G.; Quintieri, L.; Rocchi, A.; Ronga, F.; Terenzi, R.; Visco, M.; Votano, L.

    The resonant-mass gravitational wave detector NAUTILUS, operated by the ROG collaboration at the INFN Frascati National Laboratories, is in continuous data taking since June 1998 with peak sensitivity of h ~= 3×10-22Hz-1/2. It has recently proven to be capable of recording signals due to the passage of cosmic rays. The results of the latest coincidence analyses between the NAUTILUS data and the cosmic ray signals measured by detectors located above and below NAUTILUS are reported.

  12. Recent advances on happiness

    Directory of Open Access Journals (Sweden)

    Mohammad Reza Abedi

    2013-05-01

    Full Text Available Happiness plays essential role on building prosperity and success in any society. Happiness is one of the essential factors to reach prosperity and success in people’s life and jobs but happiness is not always the same as capability, but they may be correlated while capability is a necessary for having a happy life and happiness feeds back on capability in different ways. People who feel happy could better contribute to society and help other people build better future. This study performs a review on recently completed studies on factors, which influence happiness, new definitions of happiness. The study concentrates more on empirical investigations on the concept of happiness.

  13. Recent BABAR Results

    Energy Technology Data Exchange (ETDEWEB)

    Eigen, Gerald [University of Bergen, Bergen (Norway). Dept. of Physics

    2015-04-29

    We present herein the most recent BABAR results on direct CP asymmetry measurements in B → Xsγ, on partial branching fraction and CP asymmetry measurements in B → Xs+-, on a search for B → π/ηℓ+- decays, on a search for lepton number violation in B+ → X-+ℓ'+ modes and a study of B0 →ωω and B0 → ωφ decays.

  14. Recent RI tomography

    International Nuclear Information System (INIS)

    Katsuyama, Naofumi; Kawakami, Kenshi

    1979-01-01

    In this paper, new equipments for radionuclide tomography and recent radiopharmaceuticals with positron emission are described. Positron CT is very usefull for functional imaging. Those nucleides 11 C, 13 N and 15 O have been studied for their sake, but used as a usefull tool as tracer elements for the basic research in the fields of chemistry, bio-chemistry, biology and medicine. Also they have been utilized in the diagnosis of diseases, particularly in the non-invasive and dynamic assessment of metabolic and functional disorders in the patients. We will also describe the clinical usefullness of a commercial scanner such as the Anger multiplane tomographic scanner (PHO/CON). (author)

  15. Supersymmetric inflation: Recent progress

    International Nuclear Information System (INIS)

    Ovrut, B.A.; Steinhardt, P.J.

    1986-01-01

    The new inflationary universe scenario is, in principle, a simple and powerful approach to resolving a large number of fundamental cosmological problems. However, in order for the scenario to be considered a complete theory, one critical question remains to be answered: What is the physics responsible for the phase transition that triggers the exponential expansion (inflation) of the universe? One possibility that the authors and several other groups have been pursuing is that the physics responsible for the phase transition involves (local) supersymmetry. The goal of this paper is to review the present status of ''Supersymmetric Inflation'', particularly emphasizing some very exciting results that they recently obtained

  16. Recent results in hydrogen research

    International Nuclear Information System (INIS)

    Berman, M.; Sherman, M.P.; Wong, C.C.

    1987-01-01

    Progress has been made in the NRC-supported hydrogen research program in three areas: (1) a comparison of the HECTR and MAAP codes; (2) the completion of a series of experiments in the FLAME facility on flame acceleration and the transition from deflagration to detonation; and (3) a qualitative assessment of the potential for local detonations in a reactor containment. There are significant differences between the combustion models in HECTR and MAAP. These modelling differences can result in different predictions of containment pressure and temperature. Recent FLAME experiments have shown that spontaneous transition from deflagration to detonation can take place in hydrogen mixtures that are relatively insensitive. The presence of obstacles and the degree of confinement also play important roles in the likelihood of this transition. Information obtained during these experiments has been combined with other data and subjective judgments to develop a qualitative methodology for estimating the probability of local detonations. This methodology has been applied to the Bellefonte containment for some accident scenarios

  17. Climate change: Recent findings

    International Nuclear Information System (INIS)

    Hesselmans, G.H.F.M.

    1993-08-01

    In the late eighties several reports have been published on climate change and sea level rise. In the meantime insights may have changed due to the availability of better and more observations and/or more advanced climate models. The aim of this report is to present the most recent findings with respect to climate change, in particular of sea level rise, storm surges and river peak flows. These climate factors are important for the safety of low-lying areas with respect to coastal erosion and flooding. In the first chapters a short review is presented of a few of the eighties reports. Furthermore, the predictions by state of the art climate models at that time are given. The reports from the eighties should be considered as 'old' information, whereas the IPCC supplement and work, for example, by Wigley should be considered as new information. To assess the latest findings two experts in this field were interviewed: dr J. Oerlemans and dr C.J.E. Schuurmans, a climate expert from the Royal Netherlands Meteorological Institute (KNMI). Their views are presented together with results published in recent papers on the subject. On the basis of this assessment, the report presents current knowledge regarding predictions of climate change (including sea-level rise) over the next century, together with an assessment of the uncertainties associated with these predictions. 14 figs., 11 tabs., 24 refs

  18. Sublingual Immunotherapy: Recent Advances

    Directory of Open Access Journals (Sweden)

    Enrico Compalati

    2013-01-01

    Full Text Available The practice of administering sublingual immunotherapy for respiratory allergy is gaining more and more diffusion worldwide as a consequence of the robust demonstration of clinical efficacy and safety provided by recent high-powered and well-designed studies, confirming for individual seasonal allergens the results of previous metanalyses in adult and pediatric populations. Preliminary evidence derives from recent rigorous trials on perennial allergens, like house dust mites, and specifically designed studies addressed the benefits on asthma. Emerging research suggests that SLIT may have a future role in other allergic conditions such as atopic dermatitis, food, latex and venom allergy. Efforts to develop a safer and more effective SLIT for inhalant allergens have led to the development of allergoids, recombinant allergens and formulations with adjuvants and substances targeting antigens to dendritic cells that possess a crucial role in initiating immune responses. The high degree of variation in the evaluation of clinical effects and immunological changes requires further studies to identify the candidate patients to SLIT and biomarkers of short and long term efficacy. Appropriate management strategies are urgently needed to overcome the barriers to SLIT compliance.

  19. Reviews of recent publications

    Directory of Open Access Journals (Sweden)

    2003-01-01

    Full Text Available Aizenberg, Edna. Parricide on the Pampa? A New Study and Translation of Alberto Gerchunoffs "Los gauchos judíos" by Jan Mennell Emerson, Caryl, ed. Critical Essays on Mikhail Bakhtin by Michael Barry Finney, Gail. Christa Wolf by Stephen Brockmann Hoeg, Jerry. Science, Technology, and Latin American Narrative in the Twentieth Century and Beyond by Paul Fallon Mendez-Ramirez, Hugo. Neruda's Ekphrastic Experience: Mural Art and Canto general by Agustin Boyer Perriam, Chris, Michael Thompson, Susan Frenk, and Vanessa Knights. A New History of Spanish Writing: 1939 to the 1990s by William Sherzer Soto, Francisco. Reinaldo Arenas by Marina Llorente

  20. Reviews of recent publications

    Directory of Open Access Journals (Sweden)

    1994-06-01

    Full Text Available Bjornson, Richard. The African Quest for Freedom and Identity: Cameroonian Writing and the National Experience by Thomas A. Hale Cixous, Hélène. 'Coming to Wrting' and Other Essays by Randi Brox Birn Derwin, Susan. The Ambivalence of Form: Lukacs, Freud, and the Novel by Eva L. Corredor Kaminsky, Amy K. Reading the Body Politic: Feminist Criticism and Latin American Women Writers by Naomi Lindstrom Nägele, Rainer. Theater, Theory, Speculation: Walter Benjamin and the Scenes of Modernity by Alice A. Kuzniar Tomlinson, John. Cultural Imperialism by Michael Filcher Weisberg, Richard. Poethics and Other Strategies of Law and Literature by Sara B. Blair

  1. Recent experience in the use of IAEA planning methodologies for energy, electricity and nuclear power planning among Member States of Europe, the Middle East and North Africa. Proceedings of a workshop

    International Nuclear Information System (INIS)

    1996-02-01

    This report contains the proceedings of a workshop held in Budapest, Hungary, from 18 to 22 July 1994. The workshop had, as a basic objective, the promotion of the regional exchange of experience in the use of the IAEA's planning tools and of providing a forum for further co-operation among participating countries. This report is intended to serve as a useful guide for the users of the IAEA planning models, as well as energy and electricity planners in general. Refs, figs, tabs

  2. Recent development on Nimrod

    International Nuclear Information System (INIS)

    Gardner, I.S.K.

    1977-01-01

    Recent development carried out on the main magnet field correction system, the beam diagnostics and the beam extraction systems of the Nimrod 7 GeV proton synchrotron, is described. New magnet field correction system provides a correction set of different magnet parameters. An analog of the requiered correction set is produced by the analogue programmer. A full aperture ferrite current transformer has been installed to measure the beam injected into the accelerator. The aperture of the transformer is 97 by 25 cm. The extracted beam intensity, position and profile are monitored at various points in the external beam transport lines, using multiple plate secondary emission chambers. Beam spill for a rapid cycling bubble chamber and extracted beams for the study of a spallation of neutron source target have been produced

  3. Neutrino mass: Recent results

    International Nuclear Information System (INIS)

    Robertson, R.G.H.

    1989-01-01

    Some recent developments in the experimental search for neutrino mass are discussed. Simpson and Hime report finding new evidence for a 17-keV neutrino in the β decay of 3 H and 35 S. New data from Los Alamos on the electron neutrino mass as measured in tritium beta decay give an upper limit of 13.5 eV at the 95% confidence level. This result is not consistent with the long-standing ITEP result of 26(5) eV within a ''model-independent'' range of 17 to 40 eV. It now appears that the electron neutrino is not sufficiently massive to close the universe by itself. 38 refs., 1 figs., 2 tabs

  4. Recent patents on flavonoids.

    Science.gov (United States)

    Mamta, Gokhale; Bansal, Y K; Sandhu, S S

    2013-12-01

    Flavonoids are substances which are widely distributed in the plant kingdom. They occur in considerable quantities in common food products, spices and beverages. Interest of researchers has been greatly enhanced towards therapeutic potential of flavonoids in last some years. This review summarizes important patents pertaining to recent biotechnological techniques applied for the production, analysis of biosynthetic pathways, effects and applications of different flavonoids. For systematic studies investigations which have been published in the form of patents, are classified in different sectors like biosynthesis, medical application, antimicrobial activity, alteration of flower color, industrial application, cosmetics, food and plant tissue culture. A number of activities have been observed in each sector with vast area of research on flavonoids.

  5. GRBs: Recent Observational Results

    Science.gov (United States)

    Gehrels, Neil

    2009-01-01

    We are in an exciting period of discovery for gamma-ray bursts. The Swift observatory is detecting 100 bursts per year, providing arcsecond localizations and sensitive observations of the prompt and afterglow emission. The Fermi observatory is observing 250 bursts per year with its medium-energy ORB instrument and about 10 bursts per year with its high-energy LAT instrument. In addition, rapid-response telescopes on the ground are providing new capabilities to study optical emission during the prompt phase and spectral signatures of the host galaxies. The combined data set is enabling great advances in our understanding of GRBs including afterglow physics, short burst origin, and high energy emission. This talk will highlight recent findings.

  6. Recent developments in myelofibrosis

    Directory of Open Access Journals (Sweden)

    Mesa RA

    2012-07-01

    Full Text Available Raoul Tibes, James M Bogenberger, Ruben A MesaDivision of Hematology and Oncology, Mayo Clinic, Scottsdale, AZ, USAAbstract: The myeloproliferative neoplasm of myelofibrosis (MF is clinically constituted by individuals both with primary MF, as well as those that evolved from an antecedent polycythemia vera or essential thrombocythemia. Individuals presenting with MF have a heterogeneous phenotype which can involve significant constitutional symptoms (night sweats, fevers, weight loss, fatigue, variable but frequently problematic splenomegaly, and multifactorial cytopenias. These individuals clearly have decreased survival. Refinement of MF prognostic scores can distinguish from survival as poor as 16 months, to a median survival of 185 months. Sadly, although curative, allogeneic stem cell transplant still has sobering success rates for individuals of the standard ages for MF. Recent reports suggest less than half of patients will be alive at 3 years after allotransplant above the age of 60 years. The most important recent advancement in MF therapy has been the development of Janus kinase 2 (JAK2 inhibitors led by ruxolitinib, now Food and Drug Administration approved in the United States, and several other JAK2 inhibitors (in testing including SAR302503, CYT387, and SB1518. In randomized, placebo-controlled studies, ruxolitinib was demonstrated to be superior for the improvement of splenomegaly and symptoms. These benefits are mirrored across other JAK2 inhibitors. Improving anemia remains an unmet need in MF and is currently being evaluated by clinical trials utilizing the JAK2 inhibitor CYT387, as well as pomalidomide. Additional areas of interest for MF therapy include the inhibition of histone/lysine deacetylases, hedgehog pathway inhibition, as well as combination strategies with JAK2 inhibitors.Keywords: myeloproliferative neoplasm, myelofibrosis, JAK2 inhibitors

  7. Laser technology inspires new accelerator concepts

    CERN Multimedia

    Katarina Anthony

    2012-01-01

    A new EU-funded research network, LA³NET, is bringing together universities, research centres and industry partners worldwide to explore the use of laser technology in particle beam generation, acceleration and diagnostics. As one of the network partners, CERN will be hosting three early stage researchers in the BE and EN Departments.   One of the laser systems now in use in the ISOLDE experiment. If you take a closer look at recent experimental developments, you’ll notice a new topic trending: laser technology. It’s being used to study the characteristics of particles, as incorporated into the new ALPHA-2 set-up; to conduct diagnostics of particle beams, as used in a laser wire scanner at Petra III; to “breed” unusual ion beams, as carried out by ISOLDE’s Resonance Ionization Laser Ion Source (RILIS); and even to accelerate particles to high energies, as explored at Berkeley’s BELLA facility. These projects notwithstanding...

  8. Recent Results from BLAST

    International Nuclear Information System (INIS)

    Hasell, D.K.

    2005-01-01

    The Bates Large Acceptance Spectrometer Toroid experiment, BLAST, at the MIT-Bates Linear Accelerator Laboratory is designed to study in a systematic manner the spindependent electromagnetic interaction in few-nucleon systems at momentum transfers below 1 GeV/c. Utilizing a polarized electron beam, highly polarized internal gas targets of H and D, and a symmetric detector configuration, BLAST is able to make simultaneous measurements of several reaction channels for different combinations of beam helicity and target polarization (vector for H, both vector and tensor for D). BLAST will provide new data on the nucleon and deuteron form factors as well as study few body physics and pion production. Preliminary results are presented

  9. Reviews of recent publications

    Directory of Open Access Journals (Sweden)

    2009-06-01

    Full Text Available Sara Lennox. Cemetery of the Murdered Daughters: Feminism, History, and Ingeborg Bachmann by Kristin T. Vander Lugt Birgit Tautz. Reading and Seeing Ethnic Differences in the Enlightenment: From China to Africa by Susanne Kelley Patrick Greaney. Untimely Beggar. Poverty and Power from Baudelaire to Benjamin by Christine Rinne Philip Payne, Graham Bartram, and Galin Tihanov, eds. A Companion to the Works of Robert Musil by Geoffrey C. Howes Jennifer Willging. Telling Anxiety: Anxious Narration in the Work of Marguerite Duras, Annie Ernaux, Nathalie Sarraute and Anne Hébert by Natalie Edwards Michael Lucey. Never Say I: Sexuality and the First Person in Colette, Gide, and Proust by Elissa Gelfand Anthony Waine. Changing Cultural Tastes. Writers and the Popular in Modern Germany by Katrin Völkner Susan Ireland and Patrice Proulx, eds. Textualizing the Immigrant Experience in Contemporary Quebec by Amy Hubbell Cristina Peri Rossi. State of Exile . Trans. Marilyn Buck. by Reina Ruiz

  10. Recent Perspectives in Geoheritage

    Science.gov (United States)

    Olive, Cécile; van Wyk de Vries, Benjamin

    2015-04-01

    Geoheritage is developing at all scales from small local sites, regional and national initiatives, to global Geoparks and to UNESCO World Heritage sites. It is increasingly appreciated that the more people understand geosciences and Earth systems processes, the better we as scientists are able to communicate concepts such as natural hazards, risk, and environmental change. Getting people to visit geoheritage sites is one of the best ways to communicate concepts and to draw the public into the geoscience process. Local communities, and be involved in the creation of geoheritage sites and can benefit from an increased awareness and a deepened sense of place and importantly, can reap the economic benefits from visitors. As geoscience itself changes, geoheritage should adapt to reflect new knowledge and find ways to communicate and answer newly-arising societal questions. Also, geoscience individuals and organisations should assure a strong representation in governmental and international heritage structures, to assure that the community and our science is fully represented at all levels and that the great diversity of outstanding geological value be fully realised. In 2014 a complete GeoHeritage review has been called for by the UNESCO World Heritage committee, echoing a widening gap between the geo-community and mandated NGOs. Clarification of Geopark and World Heritage site distinctions has been called for. This is a consequence of the divergence between States, academics and UNESCO advisory bodies. The gap is about 1) what geological elements are outstanding for science and heritage; 2) site assessment, 3) who is competent to assess; 4) management and compatibility of humans in geoheritage sites. We will explore and share experience on geoheritage and World Heritage from an international viewpoint and through our experiences on the Chaîne des Puys and Limagne Fault World Heritage project.

  11. Recent results of CHIMERA activity

    Directory of Open Access Journals (Sweden)

    Pagano A.

    2012-07-01

    Full Text Available The experimental activity of CHIMERA in recent years has been characterized by a steady progress in the detection technique and data analysis. Since 2008 the detector system benefits of new implementations: a new reaction chamber, a new charged particle identification in silicon detector made by an extended pulse shape method and an efficient system for the identification of exotic beams produced by projectile-like fragmentation (In-flight method. These implementations appear to be promising tools in view of further exclusive experiments in the field of isospin physics. The coupling of CHIMERA with other equipments (such as interferometers and highly segmented arrays, magnetic elements, neutron detectors, etc. is also envisaged in order to extend the studies of the reaction mechanism in heavy ion physics.

  12. PHENIX recent heavy flavor results

    Energy Technology Data Exchange (ETDEWEB)

    Lim, Sanghoon

    2014-06-15

    Cold nuclear matter (CNM) effects provide an important ingredient to interpret the results from heavy-ion collisions. Such effects include nuclear shadowing, intrinsic parton transverse momentum broadening, and initial patron energy loss. The measurement of heavy quark production is a good probe to study the CNM effects particularly on gluons, since heavy quarks are mainly produced via gluon fusions at RHIC energy. The PHENIX experiment has an ability to study the CNM effects by measuring leptons from heavy-flavor decay in a broad kinematic range. Comparisons of the results measured in different rapidity regions allow us to study modification of gluon density function in the Au nucleus depending on parton fractional momentum x. In addition, comparisons to the results from heavy-ion collisions (Au + Au and Cu + Cu) measured by PHENIX provide an insight into the role of CNM effects in such collisions. Recent PHENIX results on heavy quark production are discussed in this presentation.

  13. Recent Developments In Urea

    Science.gov (United States)

    Rosker, Mark J.

    1987-03-01

    Recent developments relating to the application of the urea crystal to non-linear optics reviewed. The urea crystal has been shown to be a useful material for non-linear optics applications. Urea has been studied within the context of both frequency upconversion1 and, more recently, optical parametric oscillation (0P0).2-4 It is particularly the latter application which will be discussed. Urea is an organic crystal within the 42m space group class, the same as the ADP ismorphs. It is optically clear from 200 nm to 1.4 μm, which is consistent with parametric oscillation in the visible and near infrared. Its birefringence is approximately twice that of ADP, which leads to an OPO producing light at shorter wavelengths than for most other non-linear crystals. The non-linear coefficient of urea is approximately 2.5 times that of ADP. While a relatively soft crystal, urea can be optically polished to a flatness of less than an optical wavelength using methods similar to those of ADP. The thermal behavior of urea is excellent; the temperature-dependence of the phase-matching angle is much smaller then ADP. Urea is a hygroscopic crystal, a fact which complicates its practical use. Typically, this problem is overcome by immersing the crystal in an index matching liquid such as hexane. The most difficult problem with regards to the use of urea has been and continues to crystal growth. However, high quality urea crystals of length greater than 20 mm in the (110) direction have been grown from solution in the laboratory. Solution growth requires precise temperature control over very long growth times (on the order of one year). Recently, crystal sizes on the order of 1 cm3 have become commercially available. The urea crystal is positive uniaxial, a characteristic which is advantageous for OPO ications. By utilizing type II (o -> o + e) phase-matching and resonating the ordinary wave, the degree of Poynting vector walk-off of the signal from the pump due to double action is

  14. Most recent Web Lectures

    CERN Multimedia

    Steven Goldfarb

    Web Archives of ATLAS Plenary Sessions, Workshops, Meetings, and Tutorials recorded over the past two years are available via the University of Michigan portal here. Most recent additions include the ROOT Workshop held at CERN on March 26-27, the Physics Analysis Tools Workshop held in Bergen, Norway on April 23-27, and the CTEQ Workshop: "Physics at the LHC: Early Challenges" held at Michigan State University on May 14-15. Viewing requires a standard web browser with RealPlayer plug-in (included in most browsers automatically) and works on any major platform. Lectures can be viewed directly over the web or downloaded locally. In addition, you will find access to a variety of general tutorials and events via the portal. Suggestions for events or tutorials to record in 2007, as well as feedback on existing archives is always welcome. Please contact us at wlap@umich.edu. Thank you and enjoy the lectures! The Michigan Web Lecture Team Tushar Bhatnagar, Steven Goldfarb, Jeremy Herr, Mitch McLachlan, Homer A....

  15. Recent Developments at Aladdin

    CERN Document Server

    Jacobs, Ken; Bisognano, Joseph; Eisert, David; Fisher, Michael; Green, Michael; Keil, Richard; Kleman, Kevin J; Legg, Robert; Rogers, Greg; Stott, John

    2005-01-01

    Following on the success of lower emittance operation at 800 MeV, SRC is pursuing a number of additional enhancements to the performance of the Aladdin storage ring. Work on Aladdin has included development of low emittance lattices at 1 GeV, which will maximize the capabilities of a recently installed spectromicroscopy beamline and a proposed high-resolution keV beamline. Installation of one-meter long insertion devices in the short straight sections within the quadrant arcs of the four sided storage ring is being considered to increase the number of undulator beamlines from four to possibly eight. Studies have been made to determine what is the minimum insertion device gap that does not interfere with nominal ring operation (injection, ramping, and lifetime at full energy), and indicate that smaller-gapped devices for higher photon energy are reasonable. Lifetime increases or further emittance reductions appear possible with modest aperture increases at a small number of points on the ring. Finally, plannin...

  16. Recent SLC developments

    International Nuclear Information System (INIS)

    Ross, M.

    1993-04-01

    The SLAC Linear Collider (SLC) is the forerunner of a new generation of high energy accelerators. As such, it incorporates many novel features that must be fully exploited to achieve optimum performance. In this paper we present an overview of the frontiers of collider performance at SLC. Recent developments have centered on polarization, intensity and emittance preservation issues. A polarized source and spin transport system were successfully commissioned in 1992 and operated with high reliability. Practical intensity limits associated with rapid growth ( S ) bunch length instabilities have been observed in the damping rings. Ring RF voltage manipulations are used to suppress the instabilities. Emittance preservation technique development has focused on controlling system-wide instabilities and improving feedback and tuning procedures. Control of instabilities of all time scales, pulse to pulse, fast and slow, is one of the most challenging aspects of the collider. The challenge is met with (1) very high level of control and automation required for general tuning and optimization, (2) real-time transport line optical correction and monitoring, (3) coupled, high level, trajectory and energy feedback, (4) high order multipole optical correction and monitoring, (5) feedback-based linac beam emittance preservation, and (6) interaction region luminosity optimization. The common thread beneath all of these is the SLC control system which must provide a level of control, diagnosis and feedback not required for simpler machines

  17. Helix mimetics: Recent developments.

    Science.gov (United States)

    Wilson, Andrew J

    2015-10-01

    The development of protein-protein interaction (PPIs) inhibitors represents a challenging goal in chemical biology and drug discovery. PPIs are problematic targets because they involve large surfaces with less well defined features and recognition motifs that are less amenable to conventional experimental and computational ligand discovery methodologies. α-Helix mediated PPIs represent a sub group with a clearly defined interface and thus may be more amenable to the development of generic ligand discovery methods. Indeed, this is borne out in numerous studies using peptides covalently constrained into a helical conformation resulting in improvement of myriad biophysical and cellular properties. It is however desirable to have small molecule alternatives: a helix mimetic (proteomimetic) is a generic small molecule scaffold that projects functional groups in a similar spatial orientation so as to mimic the presentation of key amino acid side chains from the helix that mediates the PPI. The first true example of a helix mimetic was described over a decade ago however this approach has not yet been elaborated to the extent that it receives similar levels of attention to constrained peptides. This review explores recent significant developments in the area of small molecule α-helix mimetics and provides a critical overview of success stories, potential limitations of the approach, and areas for future development. Copyright © 2015 Elsevier Ltd. All rights reserved.

  18. Recent development of THORplan

    International Nuclear Information System (INIS)

    Lin Tzungyi; Liu Yenwan Hsueh

    2006-01-01

    THORplan is a treatment planning system under development and refinement at Tsing Hua University, Taiwan for BNCT purpose. It prepares input file of MCNP for the flux/dose calculation and processes the output files for dose contour and dose profile displays. Using Interactive Data Language, THORplan is recently developed with user-friendly interface with three modules. THORimage reads in CT images of patient head, and transforms it into 5 tissue types according to threshold values of CT numbers. User may also use pen-drawing to specify tumor, muscle and eye-lens if needed. In the homogeneous model, each 8x8 voxels is homogenized into one cell, and cells of similar compositions are grouped into one material. Cell cards and material cards are then generated. THORinput reads in KERMA factors, source files, cell and material cards. Number of particles to be simulated, source plane location and orientation are specified by the user. After execution of MCNP, THORdose combines MCNP output files from separate runs due to neutron and photon sources, and runs of different beam directions. According to the user-specified RBE and irradiation time, THORdose generates a 3D dose data which can be displayed as 2D contours, 1D profiles and DVH for use in treatment planning. (author)

  19. Recent advances in radiopharmaceuticals

    International Nuclear Information System (INIS)

    Smith, S.

    2000-01-01

    Full text: Radiopharmaceuticals in Nuclear Medicine may be divided into diagnostic and therapeutic agents. The diagnostic area is perceived to be mature, while the therapeutic side of nuclear medicine is still evolving. There are over 100 diagnostic radiopharmaceutical products available, the greatest number applied in cardiology followed by oncology and neurology. The greatest success in therapeutic nuclear medicine has been achieved in thyroid cancer, hyperthyroidism and bone pain palliation. Those in the field believe the future of nuclear medicine resides in the growth potential of the emerging therapeutic market, hence much of the recent research has been focussed in the development of therapeutic agents for targeting cancers. Radiopharmaceuticals under development or in clinical trials involve the use of radionuclides such as Y-90, Pd-103, Ir-192, Re-188, I-131, Sm-153, Sn-114, Sr-90, Cu-64 and In-111. Advances in cyclotron and camera technology as well as automation has enhanced and widened the potential use of positron emitting radiopharmaceuticals such as F-18 Fluorodeoxyglucose (FDG). However the relationship between FDG uptake and glucose consumption in normal and diseased tissue is still to be defined. Many challenges remain for the nuclear medicine community to apply new knowledge of human biochemistry in the development of new radiopharmaceuticals. A better understanding of effects of radiation and its role in the design of therapeutic agents is undoubtedly pivotal for advancing therapeutic Nuclear Medicine into the future

  20. Recent advances of nanodosimetry

    International Nuclear Information System (INIS)

    Grosswendt, B.

    2004-01-01

    The early damage to genes and cells due to ionizing radiation is initiated by the overlay of the track structure of charged particles and of the structure of radiosensitive sub-cellular volumes. As a result of this overlay, a specified number of ionizations (the ionization cluster size) is formed per primary particle. Therefore, one of the aims of nanodosimetry is to determine ionization cluster-size distributions in nano-metric volumes of liquid water, as a substitute to sub-cellular structures. After a short description of the main aspects of cluster-size formation by charged particles, an overview of the advanced measuring techniques that use millimetric target volumes filled with a low-pressure gas to simulate nano-metric target volumes at unit density is given. Afterwards, physical principles are discussed which are applicable to convert ionization cluster-size distributions measured in gases into those for liquid water. Finally, a tentative possibility is proposed of how to relate parameters derived from cluster-size distributions in liquid water to parameters derived from radiation-induced radiobiological experiments. (authors)

  1. Recent results from TFTR

    International Nuclear Information System (INIS)

    Hawryluk, R.J.; Bell, M.G.; Bitter, M.

    1984-05-01

    During the past year, the research activities on TFTR have encompassed three broad areas. The first was to extend the operating range of TFTR. Plasma currents up to 1.5 MA were achieved in discharges with a = 0.83 m, R = 2.55 m at a toroidal field of 2.7 T. In these large plasmas, the maximum line average density was 3.35 x 10 19 m -3 . The second activity was a study of the scaling of the energy confinement time, tau/sub E/, in ohmically heated discharges as a function of plasma current, density, and plasma size. These experiments indicate a favorable scaling of tau/sub E/ with size and density. Energy confinement times in excess of 0.25 s were obtained in deuterium discharges. The third activity was a study of adiabatic compression. During compression, the plasma current and ion temperature scaled approximately as predicted; however, the electron temperature and density scaled less strongly than predicted for ideal compression

  2. Self-Organization of Stem Cell Colonies and of Early Mammalian Embryos: Recent Experiments Shed New Light on the Role of Autonomy vs. External Instructions in Basic Body Plan Development

    Directory of Open Access Journals (Sweden)

    Hans-Werner Denker

    2016-10-01

    Full Text Available “Organoids”, i.e., complex structures that can develop when pluripotent or multipotent stem cells are maintained in three-dimensional cultures, have become a new area of interest in stem cell research. Hopes have grown that when focussing experimentally on the mechanisms behind this type of in vitro morphogenesis, research aiming at tissue and organ replacements can be boosted. Processes leading to the formation of organoids in vitro are now often addressed as self-organization, a term referring to the formation of complex tissue architecture in groups of cells without depending on specific instruction provided by other cells or tissues. The present article focuses on recent reports using the term self-organization in the context of studies on embryogenesis, specifically addressing pattern formation processes in human blastocysts attaching in vitro, or in colonies of pluripotent stem cells (“gastruloids”. These morphogenetic processes are of particular interest because, during development in vivo, they lead to basic body plan formation and individuation. Since improved methodologies like those employed by the cited authors became available, early embryonic pattern formation/self-organization appears to evolve now as a research topic of its own. This review discusses concepts concerning the involved mechanisms, focussing on autonomy of basic body plan development vs. dependence on external signals, as possibly provided by implantation in the uterus, and it addresses biological differences between an early mammalian embryo, e.g., a morula, and a cluster of pluripotent stem cells. It is concluded that, apart from being of considerable biological interest, the described type of research needs to be contemplated carefully with regard to ethical implications when performed with human cells.

  3. Recent progress on laser acceleration research

    International Nuclear Information System (INIS)

    Nakajima, Kazuhisa; Dewa, Hideki; Hosokai, Tomonao; Kanazawa, Shuhei; Kando, Masaki; Kondoh, Shuji; Kotaki, Hideyuki

    2000-01-01

    Recently there has been a tremendous experimental progress in ultrahigh field particle acceleration driven by ultraintense laser pulses in plasmas. A design of the laser wakefield accelerators aiming at GeV energy gains is discussed by presenting our recent progress on the laser wakefield acceleration experiments, the developments of high quality electron beam injectors and the capillary plasma waveguide for optical guiding of ultrashort intense laser pulses. (author)

  4. Recent QCD Studies at the Tevatron

    Energy Technology Data Exchange (ETDEWEB)

    Group, Robert Craig

    2008-04-01

    Since the beginning of Run II at the Fermilab Tevatron the QCD physics groups of the CDF and D0 experiments have worked to reach unprecedented levels of precision for many QCD observables. Thanks to the large dataset--over 3 fb{sup -1} of integrated luminosity recorded by each experiment--important new measurements have recently been made public and will be summarized in this paper.

  5. Recent results from ep scattering at HERA

    International Nuclear Information System (INIS)

    Haas, T.

    1994-09-01

    The HERA experiments, H1 and ZEUS, had their second running period during the summer and fall of 1993 collecting 0.5 pb -1 of data each, a twentyfold increase in statistics over the previous running period. This large increase in statistics together with an improved understanding of the detectors has brought a wide range of physics questions within the reach of the experiments. In this report we give a brief overview of some of the studies performed recently. (orig.)

  6. CANDU plant maintenance: Recent developments

    International Nuclear Information System (INIS)

    Charlebois, P.

    2000-01-01

    CANDU units have long been recognized for their exceptional safety and reliability. Continuing development in the maintenance area has played a key role in achieving this performance level. For over two decades, safety system availability has been monitored closely and system maintenance programs adjusted accordingly to maintain high levels of performance. But as the plants approach mid life in a more competitive environment and component aging becomes a concern, new methods and techniques are necessary. As a result, recent developments are moving the maintenance program largely from a corrective and preventive approach to predictive and condition based maintenance. The application of these techniques is also being extended to safety related systems. These recent developments include use of reliability centred methods to define system maintenance requirements and strategies. This approach has been implemented on a number of systems at Canadian CANDU plants with positive results. The pilot projects demonstrated that the overall maintenance effort remained relatively constant while the system performance improved. It was also possible to schedule some of the redundant component maintenance during plant operation without adverse impact on system availability. The probabilistic safety assessment was found to be useful in determining the safety implications of component outages. These new maintenance strategies are now making use of predictive and condition based maintenance techniques to anticipate equipment breakdown and schedule preventive maintenance as the need arises rather than time based. Some of these techniques include valve diagnostics, vibration monitoring, oil analysis, thermography. Of course, these tools and techniques must form part of an overall maintenance management system to ensure that maintenance becomes a living program. To facilitate this process and contain costs, new information technology tools are being introduced to provide system engineers

  7. Determinants of Recent Immigrants' Location Choices

    DEFF Research Database (Denmark)

    Damm, Anna Piil

    This paper exploits a Danish spatial dispersal policy on refugees which can be regarded a natural experiment to investigate the influence of regional factors on recent immigrants' locational choices. The main push factors are lack of co-ethnics and presence of immigrants. Additional push factors...

  8. Nucleon structure in view of recent developments

    International Nuclear Information System (INIS)

    Martin, A.D.

    1993-01-01

    We review the present knowledge of the parton structure of the proton. We discuss recent developments concerning deep-inelastic scattering and parton distributions at small x, with emphasis on the predictions of perturbative QCD that are relevant to the experiment at HERA. (author). 37 refs, 16 figs, 1 tab

  9. Recent advances in dental implants.

    Science.gov (United States)

    Hong, Do Gia Khang; Oh, Ji-Hyeon

    2017-12-01

    Dental implants are a common treatment for the loss of teeth. This paper summarizes current knowledge on implant surfaces, immediate loading versus conventional loading, short implants, sinus lifting, and custom implants using three-dimensional printing. Most of the implant surface modifications showed good osseointegration results. Regarding biomolecular coatings, which have been recently developed and studied, good results were observed in animal experiments. Immediate loading had similar clinical outcomes compared to conventional loading and can be used as a successful treatment because it has the advantage of reducing treatment times and providing early function and aesthetics. Short implants showed similar clinical outcomes compared to standard implants. A variety of sinus augmentation techniques, grafting materials, and alternative techniques, such as tilted implants, zygomatic implants, and short implants, can be used. With the development of new technologies in three-dimension and computer-aided design/computer-aided manufacturing (CAD/CAM) customized implants can be used as an alternative to conventional implant designs. However, there are limitations due to the lack of long-term studies or clinical studies. A long-term clinical trial and a more predictive study are needed.

  10. Recent advances in safeguards operations

    International Nuclear Information System (INIS)

    Agu, B.; Iwamoto, H.

    1983-01-01

    The facilities and nuclear materials under IAEA safeguards have steadily increased in the past few years with consequent increases in the manpower and effort required for the implementation of effective international safeguards. To meet this challenge, various techniques and instruments have been developed with the assistance, support and cooperation of the Member States. Improved NDA equipment now permits accurate verification of plutonium and HEU bearing items; and optical and TV surveillance systems have improved remarkably. Experience in safeguarding nuclear facilities now includes fast-reactor fuel reprocessing and enrichment plants, even though the Hexapartite Safeguards Project is yet to define an agreed approach for safeguarding enrichment plants. The establishment of field offices now enables the IAEA to adequately implement safeguards at important facilities and also with more effective use of manpower. Closer cooperation with Member States via liaison or similar committees makes for effective safeguards implementation and the speedy solution of attendant problems. The technical support programmes from the Member States continue to provide the basis of the recent advances in safeguards techniques and instrumentation. (author)

  11. Recent Advances in Diamond Detectors

    CERN Document Server

    Trischuk, W.

    2008-01-01

    With the commissioning of the LHC expected in 2009, and the LHC upgrades expected in 2012, ATLAS and CMS are planning for detector upgrades for their innermost layers requiring radiation hard technologies. Chemical Vapor Deposition (CVD) diamond has been used extensively in beam conditions monitors as the innermost detectors in the highest radiation areas of BaBar, Belle and CDF and is now planned for all LHC experiments. This material is now being considered as an alternate sensor for use very close to the interaction region of the super LHC where the most extreme radiation conditions will exist. Recently the RD42 collaboration constructed, irradiated and tested polycrystalline and single-crystal chemical vapor deposition diamond sensors to the highest fluences available. We present beam test results of chemical vapor deposition diamond up to fluences of 1.8 x 10^16 protons/cm^2 showing that both polycrystalline and single-crystal chemical vapor deposition diamonds follow a single damage curve allowing one t...

  12. Collaborative experience

    DEFF Research Database (Denmark)

    Mortensen, Thomas Bøtker

    Literature review: Collaborative experience has been shown to have a positive effect on the collaborative outcome in general (Anand & Khanna, 2000; Kale, Dyer & Singh, 2002). Furthermore, it has been linked to the ability to exploit the network of the firm for learning (Powell, Koput and Smith...... experience was largest the higher the hypothesized ambiguity. Theoretically contribution: This research project aims at contributing to existing literature by arguing, that collaborative experience is a moderating variable which moderates the effects on collaborative outcome from the level of complexity......, that the largest effects from collaborative experience is from recent collaborative experience, since knowledge depreciates when it is not used. Methodologically contribution: The research project studies the dyad and aims at introducing, to this field of research, an established way of collecting data, a new...

  13. Recent Experiences in the Respiratory Unit of the Johannesburg ...

    African Journals Online (AJOL)

    Fifty-six patients,of whom 47 had intermittent positive pressure respiration, required treatment in an intensive care unit. Twenty-two patients died in the intensive care unit-a mortality rate of 39%. Also discussed and briefly illustrated are problems of intermittent positive pressure respiration, tracheostomy and endotracheal ...

  14. Recent Experiences in the Respiratory Unit of the Johannesburg ...

    African Journals Online (AJOL)

    sive care unit-a mortality rate of 39%. Also discussed and briefly iIIus~rated are problems of intermittent positive pressure respiration, tracheostomy and endotracheal intubation, cardiac arrhythmias, oxygen toxicity, fat embolism and tetanus. S. AII'. Med. l., 45,801 (1971). The staff of the Respiratory Unit of the Johannesburg.

  15. Recent experience in the analysis of postmortem samples for plutonium

    International Nuclear Information System (INIS)

    Thomas, V.W. Jr.; Kirby, L.J.; Nelson, I.C.

    1975-01-01

    Procedures are described for isotopic analysis of large autopsy tissue samples for 239 , 240 Pu and 238 Pu at Hanford. Internal tracers ( 242 Pu, 236 Pu) are presently used to measure radiochemical recovery to an accuracy of +- 5 percent. Sample sizes may be up to at least 400g for soft tissues and up to 50g for bone with recoveries of 70 +- 30 percent. Some critical points of the procedure, problems and their solutions are discussed

  16. Recent FRC translation experiments on FRX-C/T

    International Nuclear Information System (INIS)

    Rej, D.J.; Armstrong, W.T.; Chrien, R.E.; Hugrass, W.N.; Klingner, P.L.; McKenna, K.F.; Sherwood, E.G.; Siemon, R.E.; Tuszewski, M.

    1985-01-01

    Since the last CT Symposium, several accomplishments have been realized from the FRC translation studies on the FRX-C/T device: (1) FRCs have been launched into, and trapped in, a dc magnetic guide field region without the use of any pulsed ''gate'' coils; (2) detailed studies of translation dynamics have been performed which are consistent with energy conservation, adiabatic compression theory, and 2-D MHD simulations; (3) the confinement properties of translated FRC has been evaluated; (4) translation through either puff or static deuterium gas fill has been demonstrated; (5) higher density (n less than or equal to 4 x 10 15 cm -3 ) FRCs have been translated over 10-m lengths; (6) the n = 2 rotational instability has been stabilized by FRC translation into a weak helical quadrupole field

  17. Recent results on J${\\psi}$ from experiment NA50

    CERN Document Server

    Abreu, M C; Alexa, C; Arnaldi, R; Ataian, M R; Baglin, C; Baldit, A; Bedjidian, Marc; Beolè, S; Boldea, V; Bordalo, P; Borenstein, S R; Borges, C; Bussière, A; Capelli, L; Castagner, C; Castor, J I; Chaurand, B; Cheynis, B; Chiavassa, E; Cicalò, C; Claudino, T; Comets, M P; Constans, N; Constantinescu, S; Cortese, P; Cruz, J; De Falco, A; Dellacasa, G; De Marco, N; Devaux, A; Dita, S; Drapier, O; Espagnon, B; Fargeix, J; Force, P; Gallio, M; Gavrilov, Yu K; Gerschel, C; Glubellino, P; Golubeva, M B; Gonin, M; Grigorian, A A; Grossiord, J Y; Guber, F F; Guichard, A; Gulkanian, H R; Hakobyan, R S; Haroutunian, R; Idzik, M; Jouan, D; Karavitcheva, T L; Kluberg, L; Kurepin, A B; Le Bornec, Y; Lourenço, C; Macciotta, P; MacCormick, M; Marzari-Chiesa, A; Masera, M; Masoni, A; Monteno, M; Musso, A; Petiau, P; Piccotti, A; Pizzi, J R; Da Silva, W; Prino, F; Puddu, G; Quintans, C; Ramos, S; Ramello, L; Rato-Mendes, P; Riccati, L; Romana, A; Saturnini, P; Santos, H; Scalas, E; Scomparin, E; Serci, S; Shahoyan, R; Sigaudo, F; Silva, S; Sitta, M; Sonderegger, P; Tarrago, X; Topilskaya, N S; Usai, G L; Vercellin, Ermanno; Villatte, L; Willis, N

    2002-01-01

    The J/ psi production in Pb-Pb interactions induced by 158 GeV/c incident Pb ions is studied as a function of centrality, as estimated from the neutral transverse energy or, alternatively, from the very forward hadronic energy of the collision. The J/ psi yield exhibits a similar pattern with a first drop for mid-peripheral collisions and a steady decrease for the most central reactions. Conventional hadronic models axe unable to fairly reproduce this trend which finds a natural explanation in a deconfined quark-gluon phase scenario. The J / psi transverse momentum distributions and their dependence with centrality are also reviewed in this presentation. (20 refs).

  18. The Urban Experience in Recent Young Adult Novels.

    Science.gov (United States)

    Hughes-Hassell, Sandra; Guild, Sandy L.

    2002-01-01

    Uses 14 novels to illustrate 9 characteristics that exemplify the best young adult novels written about urban youth. Notes that the novels were chosen because in their characters, their settings, and the problems that drive their plots, they respond honestly and with understanding to the needs of urban teens to read about people "just like" them.…

  19. Recent Advances in Enzymatic Fuel Cells: Experiments and Modeling

    Directory of Open Access Journals (Sweden)

    Ivan Ivanov

    2010-04-01

    Full Text Available Enzymatic fuel cells convert the chemical energy of biofuels into electrical energy. Unlike traditional fuel cell types, which are mainly based on metal catalysts, the enzymatic fuel cells employ enzymes as catalysts. This fuel cell type can be used as an implantable power source for a variety of medical devices used in modern medicine to administer drugs, treat ailments and monitor bodily functions. Some advantages in comparison to conventional fuel cells include a simple fuel cell design and lower cost of the main fuel cell components, however they suffer from severe kinetic limitations mainly due to inefficiency in electron transfer between the enzyme and the electrode surface. In this review article, the major research activities concerned with the enzymatic fuel cells (anode and cathode development, system design, modeling by highlighting the current problems (low cell voltage, low current density, stability will be presented.

  20. The JCSS probabilistic model code: Experience and recent developments

    NARCIS (Netherlands)

    Chryssanthopoulos, M.; Diamantidis, D.; Vrouwenvelder, A.C.W.M.

    2003-01-01

    The JCSS Probabilistic Model Code (JCSS-PMC) has been available for public use on the JCSS website (www.jcss.ethz.ch) for over two years. During this period, several examples have been worked out and new probabilistic models have been added. Since the engineering community has already been exposed

  1. Recent Efforts and Experiments in the Construction of Aviation Engines

    Science.gov (United States)

    SCHWAGER

    1920-01-01

    It became evident during World War I that ever-increasing demands were being placed on the mean power of aircraft engines as a result of the increased on board equipment and the demands of aerial combat. The need was for increased climbing efficiency and climbing speed. The response to these demands has been in terms of lightweight construction and the adaptation of the aircraft engine to the requirements of its use. Discussed here are specific efforts to increase flying efficiency, such as reduction of the number of revolutions of the propeller from 1400 to about 900 r.p.m. through the use of a reduction gear, increasing piston velocity, locating two crankshafts in one gear box, and using the two-cycle stroke. Also discussed are improvements in the transformation of fuel energy into engine power, the raising of compression ratios, the use of super-compression with carburetors constructed for high altitudes, the use of turbo-compressors, rotary engines, and the use of variable pitch propellers.

  2. Recent experiences and problems in conducting pressure vessel surveillance examinations

    International Nuclear Information System (INIS)

    Perrin, J.S.

    1979-01-01

    Each of the commercial power reactors in the U.S.A. has a pressure vessel surveillance program. The purpose of the programs is to monitor the effects of radiation on the mechanical properties on the steel pressure vessels. A program for a given reactor includes a series of irradiation capsules containing neutron dosimeters and mechanical property specimens. The capsules are periodically removed during the life of the reactor and evaluated. The surveillance capsule examinations conducted to date have been valuable in assessing the effects of radiation on pressure vessels. However, a number of problems have been observed in the course of capsule examinations which potentially could reduce the maximum value of the data obtained. These problems are related to specimen design and preparation, capsule design and preparation, capsule installation and removal, capsule disassembly, specimen testing and evaluation, program documentation, and quality assurance. Examples of problems encountered in the preceding areas are presented in the present paper, and recommendations are made for minimization or prevention of these problems in future programs. Included in the recommendations is that appropriate ASTM standards, ASME Boiler and Pressure Vessel Code sections, and NRC regulations provide the appropriate framework for prevention of problems

  3. Recent results from CERN SPS experiments and the future heavy ...

    Indian Academy of Sciences (India)

    If such high energy densities can be obtained and the energy is sufficiently thermalised, strongly interacting matter will manifest itself as a quark-gluon plasma; the hadronic constituents become deconfined and hadrons lose their identity. Several possible signatures have been proposed over the years to look for such a ...

  4. Roundup of Recent Releases on the Gay and Lesbian Experience.

    Science.gov (United States)

    Azzolina, David S.

    1993-01-01

    The 42 titles of this nonfiction bibliography are grouped as follows: (1) collected works; (2) general works; (3) autobiography; (4) cultural studies; (5) history; (6) legal and military issues; (7) literature, film, and the arts; (8) philosophy and religion; (9) science; and (10) vocational issues. (SLD)

  5. Vortical Flow Management for Improved Configuration Aerodynamics - Recent Experiences

    Science.gov (United States)

    1983-07-01

    literature . This paper complements a preceding NASA Langley paper (rtf. 1). 2. HELICAL TRIPS The onset of asymmetry in the forebody vortices at high...this flap (shaded area) may be eliminated by means of a gothic -shaped apex. Further, by a suitable re-structuring of the vortex to delay its inboard

  6. Hypertensive disorders in pregnancy: experience with 442 recent ...

    African Journals Online (AJOL)

    Objective: To determine the incidence, pattern,and outcome of pregnancies complicatedwith hypertensive disorders at amajor university teaching hospital in Nigeria. Methods: A descriptive review of 442 consecutive cases of hypertensive disorders in pregnancy. Statistical analysis was with Fisher's exact test, Relative risk, ...

  7. Recent results from the Bugey neutrino oscillation experiment

    International Nuclear Information System (INIS)

    Koang, D.H.

    1984-01-01

    The energy spectrum of electron antineutrinos has been measured at two distances, 13.6 and 18.3 meters, from the core of a PWR power reactor at Bugey (France). About 63000 antineutrinos events have been recorded using the inverse β-decay reaction antiνe + p → n + e + . A significant difference in the counting rate between the two positions has been observed. The compatibility of the results with solutions in a two-neutrino oscillation analysis is discussed

  8. Recent experience in applying the cytogenetic dosimetry assay

    Energy Technology Data Exchange (ETDEWEB)

    Khvostunov, I.K., E-mail: 726727@mrrc.obninsk.ru [Medical Radiological Research Centre, Koroliov Str. 4, Obninsk, Kaluga Region, 249036 (Russian Federation); Sevan' kaev, A.V. [Medical Radiological Research Centre, Koroliov Str. 4, Obninsk, Kaluga Region, 249036 (Russian Federation); Lloyd, D.C. [Health Protection Agency, Centre for Radiation, Chemical and Environmental Hazards, Chilton, Didcot, Oxfordshire (United Kingdom); Nugis, V.Yu. [Burnasyan Federal Medical Biophysical Center of the Federal Medical Biological Agency, Marshala Novikova Str., 23, Moscow (Russian Federation); Voisin, P. [Institute for Radiation Protection and Nuclear Safety, SRBE, B.P. 17, 92262 Fontenay-aux-Roses Cedex (France)

    2011-09-15

    This paper considers how well standard calibration curve for translocations constructed for lymphocyte cultures irradiated in vitro with gamma-rays from {sup 60}Co compares with the translocations yield in lymphocytes taken from people at a long post-exposure time. Data were used from radiation accident victims overexposed to doses ranging from 0.2 to 8.5 Gy and who were cytogenetically followed-up for various times upto 50 y. Their cultured lymphocytes had been scored both by the conventional dicentric method and by FISH for all translocations involving painted chromosomes (2, 3, 8); (2, 3, 5) or (2, 4, 12). The in vivo dose response relationship was derived by fitting translocation frequencies to the contemporary individual doses obtained independently and confirmed by different biological assays and physical dosimetry. A comparison with the conventional in vitro curve indicates reductions of translocation frequencies with increasing time which would prejudice retrospective dose assessment by FISH. This has led to the possibility to amend the in vitro dose response curve for translocations to make it more suitable for use in retrospective biodosimetry. This approach for retrospective biodosimetry therefore uses a dose response relationship based on truly persisting translocations.

  9. [Medulloblastoma: improved survival in recent decades. Unicentric experience].

    Science.gov (United States)

    Igual Estellés, Lucía; Berlanga Charriel, Pablo; Cañete Nieto, Adela

    2017-01-01

    The aim of the study is to analyse variations in the treatment of medulloblastoma, the most common childhood brain tumour, and its impact on survival over the past two decades, as well as its clinical and pathological features. Survival analysis of all patients under 14 years old diagnosed with medulloblastoma between January 1990 and December 2013 in a Paediatric Oncology Unit. Sixty-three patients were diagnosed and treated for medulloblastoma, with a median follow-up of 5.1 years (range 0.65-21.7 years). The overall survival (OS) at 3 and 5 years was 66±13% and 55±14%, respectively. The OS at 5 years was 44%±25% in patients diagnosed in the 1990's, showing an increase to 70%±23% (p=0.032) since 2000. Clinical prognosis factors were included in the logistic regression model: age (p=0.008), presence of metastases and/or residual tumour (p=0.007), and receiving chemotherapy with radiotherapy after surgery (p=0.008). Statistically significant differences were observed for all of them. In our institution there has been a significant increase in medulloblastoma survival in the last decades. Multivariate analysis showed that this improvement was not related to the date of diagnosis, but with the introduction of chemotherapy in adjuvant treatment. This study confirmed that clinical factors significantly associated with worse outcome were age and presence of metastases at diagnosis. Copyright © 2016 Asociación Española de Pediatría. Publicado por Elsevier España, S.L.U. All rights reserved.

  10. Recent results of ECRH experiments on L-2M stellarator

    International Nuclear Information System (INIS)

    Shchepetov, S.V.; Akulina, D.K.; Batanov, G.M.

    1999-01-01

    Results are reported from experimental study of ECH heated plasma in the L-2M stellarator with special emphasis on studying the turbulent processes. It is shown that the total plasma energy at fixed total heating power is strongly dependent on the plasma position. Visible degradation of plasma confinement is observed for the inward shifted magnetic configurations where the stability conditions of ideal interchange MHD modes are violated. However, even in this case the situation can be improved by decreasing the average radius of the plasma boundary with the help of graphite limiter resulting in the increase of the Shafranov shift of magnetic surfaces and deepening of the magnetic well due to the effect of self-stabilization. This in turn causes stabilization of ideal MHD interchange modes and visible increase in plasma energy and volume average value of beta. Statistical properties of turbulence was studied both for the central part of the plasma column and for the plasma edge. It is shown that one of the critical factors determining the coherent structures and turbulent fluxes in the edge plasma is the radial electric field. (author)

  11. The impact of media coverage of referendums. Recent European experiences

    DEFF Research Database (Denmark)

    Svensson, Palle

    During the last decade a number of national referendums have taken place in Europe, mostly obligatory or government called referendums on European issues. Following these events a growing literature of research has dealt with this important aspect of democracy. In this paper the main results of t...... of this new literature are reviewed in order to identify the extent to which and under what circumstances the outcome of referendums can be influenced by the media and their coverage of referendums....

  12. Recent Results in Dark Matter Direct Detection Experiments

    Energy Technology Data Exchange (ETDEWEB)

    Kelso, Christopher Michael [Univ. of Chicago, IL (United States)

    2012-08-01

    In this dissertation, we study the original excess of low energy events observed by the Co- GeNT collaboration and the annual modulation reported by the DAMA/LIBRA collaboration, and discuss whether these signals could both be the result of the same elastically scattering dark matter particle. We find that, without channeling but when taking into account uncertainties in the relevant quenching factors, a dark matter candidate with a mass of approximately ~7.0 GeV and a cross section with nucleons of σDM-N ~2 x 10-40 cm2 could account for both of these observations. We also compare the region of parameter space favored by DAMA/LIBRA and CoGeNT to the constraints from XENON 10, XENON 100, and CDMS (Si).

  13. Operational experience and recent developments at the National Medical Cyclotron

    International Nuclear Information System (INIS)

    Conard, E.; Pac, B.; Arnott, D.W.

    1994-01-01

    The National Medical Cyclotron is a radioisotope production facility run by ANSTO and located on the grounds of the Royal Prince Alfred Hospital in Sydney, Australia. A CYCLONE 30 (IBA) cyclotron is used in the production of short-lived PET radiopharmaceuticals required by the hospital's PET Scanner and also to produce a number of bulk radiochemicals for processing and distribution throughout Australasia. Following commissioning of the cyclotron and beam lines in October 1991, and the overcoming of a number of early open-quote teething close-quote problems especially relating to the reliability of the r.f. and solid target transport systems, a steady program of improvements has been pursued. These improvements have included development of new beam diagnostics and the design and installation of a new beam line for SPECT radioisotope production. The current operations schedule includes the production of 18 FDG, 13 NH 3 , 15 O 2 and 201 Tl, 67 Ga and 123 I. This paper will discuss the process of development of the cyclotron to ably meet the present demands on it, and the problems resolved in the pursuit of this goal

  14. Recent results on short-range gravity experiment

    International Nuclear Information System (INIS)

    Hata, Maki; Akiyama, Takashi; Ikeda, Yuki; Kawamura, Hirokazu; Narita, Keigo; Ninomiya, Kazufumi; Ogawa, Naruya; Sato, Toshiaki; Seitaibashi, Etsuko; Sekiguchi, Yuta; Tsutsui, Ryosuke; Yazawa, Kazumasa; Murata, Jiro

    2009-01-01

    According to the ADD model, deviation from Newton's inverse square law is expected at below sub-millimeter scale. Present study is an experimental investigation of the Newton's gravitational law at a short range scale. We have developed an experimental setup using torsion balance bar, and succeeded to confirm the inverse square law at a centimeter scale. In addition, composition dependence of gravitational constant G is also tested at the centimeter scale, motivated to test the weak equivalence principle.

  15. Homelessness: Recent Statistics, Targeted Federal Programs, and Recent Legislation

    Science.gov (United States)

    2005-05-31

    number. 1. REPORT DATE 31 MAY 2005 2. REPORT TYPE N/A 3. DATES COVERED - 4. TITLE AND SUBTITLE Homelessness : Recent Statistics , Targeted...Prescribed by ANSI Std Z39-18 Homelessness : Recent Statistics , Targeted Federal Programs, and Recent Legislation Summary There is no single federal...2290 pgraney@crs.loc.gov Paul Irwin Education for Homeless Children and Youth 7-7573 pirwin@crs.loc.gov Garrine Laney Violence Against Women Act

  16. Recent Highlights from the ISOLDE Facility

    Science.gov (United States)

    Johnston, K.

    2015-11-01

    The ISOLDE facility is CERN's longest running experiment. In its 45 years of operation it has become the world's most comprehensive radioactive-isotope factory. Now capable of delivering more than 1000 isotopes from 70 chemical elements, ISOLDE supports a wide and diverse physics programme. This short article summarizes some of the recent highlights from this programme in the areas of nuclear physics, medicine and biology.

  17. Recent Advances and Challenges in Process Identification

    DEFF Research Database (Denmark)

    Jørgensen, Sten Bay; Lee, J.H.

    2001-01-01

    Process identification is undergoing tremendous developments as computational capabilities improve. Theories are rapidly catching up with the needs of practical applications but practical process identification experiences still reveal significant gaps between theory and practice. This review...... attempts to highlight the present gaps and challenges. With this objective, the review treats recent progress in process identification with data gathered in closed loop, and in the tailoring of an entire identification process to a given control objective....

  18. Recent Developments in Information Management

    OpenAIRE

    Tonta, Yaşar

    2005-01-01

    This presentation covers recent developments in information management outlining ubiquitous computing, ubiquitous access to information, personalization, portals, information architecture, open access, search mechanisms and institutional repositories.

  19. Recent advances in stellarator optimization

    Science.gov (United States)

    Gates, D. A.; Boozer, A. H.; Brown, T.; Breslau, J.; Curreli, D.; Landreman, M.; Lazerson, S. A.; Lore, J.; Mynick, H.; Neilson, G. H.; Pomphrey, N.; Xanthopoulos, P.; Zolfaghari, A.

    2017-12-01

    Computational optimization has revolutionized the field of stellarator design. To date, optimizations have focused primarily on optimization of neoclassical confinement and ideal MHD stability, although limited optimization of other parameters has also been performed. The purpose of this paper is to outline a select set of new concepts for stellarator optimization that, when taken as a group, present a significant step forward in the stellarator concept. One of the criticisms that has been leveled at existing methods of design is the complexity of the resultant field coils. Recently, a new coil optimization code—COILOPT++, which uses a spline instead of a Fourier representation of the coils,—was written and included in the STELLOPT suite of codes. The advantage of this method is that it allows the addition of real space constraints on the locations of the coils. The code has been tested by generating coil designs for optimized quasi-axisymmetric stellarator plasma configurations of different aspect ratios. As an initial exercise, a constraint that the windings be vertical was placed on large major radius half of the non-planar coils. Further constraints were also imposed that guaranteed that sector blanket modules could be removed from between the coils, enabling a sector maintenance scheme. Results of this exercise will be presented. New ideas on methods for the optimization of turbulent transport have garnered much attention since these methods have led to design concepts that are calculated to have reduced turbulent heat loss. We have explored possibilities for generating an experimental database to test whether the reduction in transport that is predicted is consistent with experimental observations. To this end, a series of equilibria that can be made in the now latent QUASAR experiment have been identified that will test the predicted transport scalings. Fast particle confinement studies aimed at developing a generalized optimization algorithm are also

  20. Recent Discoveries and Bible Translation.

    Science.gov (United States)

    Harrelson, Walter

    1990-01-01

    Discusses recent discoveries for "Bible" translation with a focus on the "Dead Sea Scrolls." Examines recent discoveries that provide direct support for alternative reading of biblical passages and those discoveries that have contributed additional insight to knowledge of cultural practices, especially legal and religious…

  1. Recent results from lattice calculations

    OpenAIRE

    Hashimoto, Shoji

    2004-01-01

    Recent results from lattice QCD calculations relevant to particle physics phenomenology are reviewed. They include the calculations of strong coupling constant, quark masses, kaon matrix elements, and D and B meson matrix elements. Special emphasis is on the recent progress in the simulations including dynamical quarks.

  2. Experiment Databases

    Science.gov (United States)

    Vanschoren, Joaquin; Blockeel, Hendrik

    Next to running machine learning algorithms based on inductive queries, much can be learned by immediately querying the combined results of many prior studies. Indeed, all around the globe, thousands of machine learning experiments are being executed on a daily basis, generating a constant stream of empirical information on machine learning techniques. While the information contained in these experiments might have many uses beyond their original intent, results are typically described very concisely in papers and discarded afterwards. If we properly store and organize these results in central databases, they can be immediately reused for further analysis, thus boosting future research. In this chapter, we propose the use of experiment databases: databases designed to collect all the necessary details of these experiments, and to intelligently organize them in online repositories to enable fast and thorough analysis of a myriad of collected results. They constitute an additional, queriable source of empirical meta-data based on principled descriptions of algorithm executions, without reimplementing the algorithms in an inductive database. As such, they engender a very dynamic, collaborative approach to experimentation, in which experiments can be freely shared, linked together, and immediately reused by researchers all over the world. They can be set up for personal use, to share results within a lab or to create open, community-wide repositories. Here, we provide a high-level overview of their design, and use an existing experiment database to answer various interesting research questions about machine learning algorithms and to verify a number of recent studies.

  3. Recent advances in laparoscopic surgery.

    Science.gov (United States)

    Lee, Wei-Jei; Chan, Chien-Pin; Wang, Bing-Yen

    2013-02-01

    Laparoscopic surgery has been widely adopted and new technical innovation, procedures and evidence based knowledge are persistently emerging. This review documents recent major advancements in laparoscopic surgery. A PubMed search was made in order to identify recent advances in this field. We reviewed the recent data on randomized trials in this field as well as papers of systematic review. Laparoscopic cholecystectomy is the most frequently performed procedure, followed by laparoscopic bariatric surgery. Although bile duct injuries are relatively uncommon (0.15%-0.6%), intraoperative cholangiography still plays a role in reducing the cost of litigation. Laparoscopic bariatric surgery is the most commonly performed laparoscopic gastrointestinal surgery in the USA, and laparoscopic Nissen fundoplication is the treatment of choice for intractable gastroesophageal reflux disease. Recent randomized trials have demonstrated that laparoscopic gastric and colorectal cancer resection are safe and oncologically correct procedures. Laparoscopic surgery has also been widely developed in hepatic, pancreatic, gynecological and urological surgery. Recently, SILS and robotic surgery have penetrated all specialties of abdominal surgery. However, evidence-based medicine has failed to show major advantages in SILS, and the disadvantage of robotic surgery is the high costs related to purchase and maintenance of technology. Laparoscopic surgery has become well developed in recent decades and is the choice of treatment in abdominal surgery. Recently developed SILS techniques and robotic surgery are promising but their benefits remain to be determined. © 2012 Japan Society for Endoscopic Surgery, Asia Endosurgery Task Force and Wiley Publishing Asia Pty Ltd.

  4. Recent Honey Bee Colony Declines

    National Research Council Canada - National Science Library

    Johnson, Renee

    2007-01-01

    ...). Current reports indicate that beekeepers in 35 states have been affected. Recent surveys indicate that about one-half of surveyed beekeepers have experienced "abnormal" or "severe" colony losses...

  5. Recent advances on optical metasurfaces

    Science.gov (United States)

    Zhao, Yang; Liu, Xing-Xiang; Alù, Andrea

    2014-12-01

    Metasurfaces, the two-dimensional equivalent of metamaterials, are periodic arrays of sub-wavelength engineered inclusions that can locally manipulate and enhance wave-matter interactions, thus providing unprecedented possibilities to realize exotic wave phenomena over a sub-wavelength thickness. In this review, we summarize recent advances in the theoretical modeling, realization and application of optical metasurfaces, outlining their impact on integrated and free-space flatland nanophotonic components. We describe recent developments on the homogenization of periodic metasurfaces with arbitrary inclusion shape and geometry and, on the basis of this description, we revisit recent developments in this area of research, especially focusing on their optical applications for radiation control, lensing, beam shaping and optical communications.

  6. Recent Advances in Percutaneous Nephrolithotomy

    Directory of Open Access Journals (Sweden)

    Erem Kaan Basok

    2014-05-01

    Full Text Available The continuous innovations in technology, instrumentations, and techniques allow urologists to perform percutaneous nephrolithotomy (PCNL with increasing efficacy. Although recent advances have facilitated the procedure, some steps are still challenging. A thorough review of the recent urologic literature was performed to identify these improvements in PCNL technique. The newer developments mainly focused on multimodal imaging techniques, miniaturisation of instruments, tracking and navigation systems during access to the stone, and robotic systems. Further studies are necessary to better define the benefits of these new fruitful developments which remain an active research field.

  7. Recent developments in food irradiation

    International Nuclear Information System (INIS)

    Loaharanu, P.

    1985-01-01

    Nowadays there is growing interest by the food industry, government and consumers in the use of food irradiatin to kill harmful insects, prevent diseases and keep food fresher longer. This interest has been stimulated by growing public concern over chemicals used in foods. While food irradiation technologies have been around for more than 50 years, only recently have they become cost effective and gained prominent attention as potentially safer ways of protecting food products and public health. This paper looks at recent developments in food irradiation processing and discusses the issues that lie ahead. (author)

  8. Recent Results from the Pierre Auger observatory

    International Nuclear Information System (INIS)

    Kampert, Karl-Heinz

    2010-01-01

    The Pierre Auger observatory is a hybrid air shower experiment which uses multiple detection techniques to investigate the origin, spectrum, and composition of ultrahigh energy cosmic rays. We present recent results on these topics and discuss their implications to the understanding the origin of the most energetic particles in nature as well as for physics beyond the Standard Model, such as violation of Lorentz invariance and 'top-down' models of cosmic ray production. Future plans, including enhancements underway at the southern site in Argentina will be presented. (author)

  9. Recent Results on Top Physics in CMS

    CERN Multimedia

    CERN. Geneva

    2012-01-01

    Top physics is a pillar of the physics programme at the LHC. It involves precision measurements, leading to constraints on standard model parameters, as well as many measurements of observables sensitive to new physics. In this seminar, an overview of measurements performed by the CMS experiment in the domain of top physics will be presented, based on pp data collected in 2011 at a center-of-mass energy of 7 TeV. The results will be compared to expectations from theory. Emphasis in will be given to more recent results and to the treatment of systematic uncertainties.

  10. Recent trials to verify quantum mechanics

    International Nuclear Information System (INIS)

    Paty, M.

    1974-01-01

    An account of the experiments which deal with the verification of Quantum Mechanics and the hidden variable problem is made. First, the well-known EPR paradox is recalled which, in spite of its refutation by Bohr, was the starting point of the questionning on the completeness of Quantum Mechanics and of hidden variable theories; and then Bell's theorem, which shows that the two approaches, Quantum Mechanics and hidden variables, can be put in contradiction. Thereafter the various types of experiments which have been carried out on that subject, mostly concerning the correlation measurements between two photons emitted by a quantum system are described. The most recent experimental results are diverging, some of them to confirm and some others to contradict quantum mechanics. A review of these is given; and a discussion is presented about their possible implications [fr

  11. Recent trend of diagnostic radiology

    International Nuclear Information System (INIS)

    Kim, S.Y.; Kim, H.K.

    1979-01-01

    Present status and recent trend of diagnostic radiology have been reviewed. The interrelationships and Characteristics of various fields of radiology such as computed tomography, X-ray radiology, and nuclear medicine were discussed. The mevit of computed tomography and the promising use of short lived, accelerator produced radionuclides, and radiotherapy in nuclear medicine were emphasized. (author)

  12. Telematics Simulation: Recent Developments & Issues.

    Science.gov (United States)

    Sutherland, Janet; Ekker, Knut; Morgan, Konrad; Crookall, David; Carbonell, Amparo Garcia

    Recent developments in Internet technologies have enabled new, more flexible forms of telematic simulation and have raised issues that were not considered in the early days of networked learning. Ultimately, these questions revolve around: (1) the learning cost-effectiveness of telematic simulation (quality and quantity of learning as opposed to…

  13. Properties of neutrinos: Recent results

    International Nuclear Information System (INIS)

    Robertson, R.G.H.

    1987-01-01

    Recent progress in experimental determinations of the properties of neutrinos is summarized. In particular, the extensive work on direct kinematic measurements of neutrino mass, on neutrino counting and on neutrino oscillations is highlighted. It is concluded that there may already be sufficient information to fix the masses of the neutrinos, but the evidence is still far from convincing. 63 refs., 13 figs

  14. Recent Releases.

    DEFF Research Database (Denmark)

    popular cinema was considered off limits for serious studies of Bible and culture. Recently, however, there has been a growing understanding of how the Bible is being used in popular culture—not as a historical document or as an authoritative canon, but as part of the cultural intertext. Cinema is a vivid...

  15. Loop quantum cosmology: Recent progress

    Indian Academy of Sciences (India)

    there are new phenomenological scenarios for the evolution of the very early universe such as inflation. We give an overview of the main effects, focussing on recent results obtained by different groups. Keywords. Quantum geometry; quantum cosmology; inflation. PACS Nos 04.60.Pp; 98.80.Bp; 98.80.Qc. 1. Introduction.

  16. Holography applications in recent China

    Science.gov (United States)

    Hsu, Dahsiung

    2000-10-01

    Reports on recent developments on holography applications in China are given in this paper, including the development of anti-counterfeiting Holograms from 1986-2000, China issued Banknotes in 1999 with holograms and OVIs, the developments in Machine Readable Holograms in China, the developments in Anti-counterfeiting Information Networks in China.

  17. Nanovaccines: recent developments in vaccination

    Indian Academy of Sciences (India)

    In the past 100 years, vaccination has contributed immensely to public health by preventing a number of infectious diseases. Attenuated, killed or part of the microorganism is employed to stimulate the immune system against it. Progress in biotechnology has provided protective immunity through DNA vaccines. In recent ...

  18. Recent developments in MCNPX trademark

    International Nuclear Information System (INIS)

    Hughes, H.G.; Adams, K.J.; Chadwick, M.B.

    1998-01-01

    The MCNPX Monte Carlo particle transport code is rapidly developing into a significant computational tool for high-energy transport applications. In this paper, the authors will discuss three recent enhancements to MCNPX: a new charged-particle collisional energy-loss model, a geometry-independent mesh-based tally system, and a radiography simulation capability

  19. Recent results from the Swinburne supercomputer software correlator

    Science.gov (United States)

    Tingay, Steven; et al.

    I will descrcibe the development of software correlators on the Swinburne Beowulf supercomputer and recent work using the Cray XD-1 machine. I will also describe recent Australian and global VLBI experiments that have been processed on the Swinburne software correlator, along with imaging results from these data. The role of the software correlator in Australia's eVLBI project will be discussed.

  20. Recent results from AMANDA II

    Energy Technology Data Exchange (ETDEWEB)

    Hanson, K.; Ahrens, J.; Bai, X.; Barwick, S.W.; Becka, T.; Becker, K.-H.; Bernardini, E.; Bertrand, D.; Binon, F.; Biron, A.; Boeser, S.; Botner, O.; Bouhali, O.; Burgess, T.; Carius, S.; Castermans, T.; Chen, A.; Chirkin, D.; Conrad, J.; Cooley, J.; Cowen, D.F.; Davour, A.; De Clercq, C.; De Young, T.; Desiati, P.; Dewulf, J.-P.; Doksus, P.; Ekstroem, P.; Feser, T.; Gaisser, T.K.; Gaug, M.; Gerhardt, L.; Goldschmidt, A.; Hallgren, A.; Halzen, F.; Hardtke, R.; Hauschildt, T.; Hellwig, M.; Herque, P.; Hill, G.C.; Hulth, P.O.; Hundertmark, S.; Jacobsen, J.; Karle, A.; Koci, B.; Koepke, L.; Kuehn, K.; Kowalski, M.; Lamoureux, J.I.; Leich, H.; Leuthold, M.; Lindahl, P.; Liubarsky, I.; Madsen, J.; Marciniewski, P.; Matis, H.S.; McParland, C.P.; Minaeva, Y.; Miocinovic, P.; Morse, R.; Nahnhauer, R.; Neunhoeffer, T.; Niessen, P.; Nygren, D.R.; Ogelman, H.; Olbrechts, Ph.; Perez de los Heros, C.; Pohl, A.C.; Price, P.B.; Przybylski, G.T.; Rawlins, K.; Resconi, E.; Rhode, W.; Ribordy, M.; Richter, S.; Rodriguez Martino, J.; Ross, D.; Sander, H.-G.; Schmidt, T.; Schneider, D.; Schwarz, R.; Silvestri, A.; Solarz, M.; Spiczak, G.M.; Spiering, C.; Steele, D.; Steffen, P.; Stokstad, R.G.; Sudhoff, P.; Sulanke, K.-H.; Taboada, I.; Thollander, L.; Tilav, S.; Walck, C.; Weinheimer, C.; Wiebusch, C.H.; Wiedemann, C.; Wischnewski, R.; Wissing, H.; Woschnagg, K.; Yodh, G.; Young, S

    2003-04-01

    We present new data taken with the AMANDA-II neutrino telescope array. The AMANDA-II upgrade was completed at the beginning of 2000. It significantly extends the sensitivity of the 10-string AMANDA-B10 detector to high- and ultrahigh-energy neutrino fluxes into regions of interest for probing current astrophysical models which remain unexplored by other experiments.

  1. Recent diboson measurements from ATLAS

    CERN Document Server

    Di Ciaccio, Lucia; The ATLAS collaboration

    2016-01-01

    The production and scattering of two electroweak vector bosons (V) @ LHC are sensitive to terms of SM & Beyond SM(BSM) Lagrangian well beyond the reach of previous experiments Measurements of dibosons final states are of great interest: * to test of the SM at the TeV scale (EW and QCD corrections & calculations * to search for New Physics

  2. Recent developments in pediatric headache.

    Science.gov (United States)

    Hershey, Andrew D

    2010-06-01

    This review will focus on some of the recent findings in pediatric headache including headache characteristics, epidemiology, comorbid associations and treatment updates. Pediatric headache remains a frequent health problem for children and their families, yet there remain many gaps in our knowledge. This review will broadly address some of the recent findings and highlight the gaps in our understanding and treatment of pediatric headache. There will be a focus on pediatric migraine as this has been the best characterized and studied. Our understanding of pediatric headache is improving with increased recognition of the characteristics and associated symptomology. This should further guide the individualized treatment approaches for improved outcome and reduction of progression into adulthood.

  3. Recent discoveries of anticancer flavonoids.

    Science.gov (United States)

    Raffa, Demetrio; Maggio, Benedetta; Raimondi, Maria Valeria; Plescia, Fabiana; Daidone, Giuseppe

    2017-12-15

    In this review we report the recent advances in anticancer activity of the family of natural occurring flavonoids, covering the time span of the last five years. The bibliographic data will be grouped, on the basis of biological information, in two great categories: reports in which the extract plants bioactivity is reported and the identification of each flavonoid is present or not, and reports in which the anticancer activity is attributable to purified and identified flavonoids from plants. Wherever possible, the targets and mechanisms of action as well as the structure-activity relationships of the molecules will be reported. Also, in the review it was thoroughly investigated the recent discovery on flavonoids containing the 2-phenyl-4H-chromen-4-one system even if some examples of unusual flavonoids, bearing a non-aromatic B-ring or other ring condensed to the base structure are reported. Copyright © 2017 Elsevier Masson SAS. All rights reserved.

  4. Recent trends in biodiesel production

    Directory of Open Access Journals (Sweden)

    Meisam Tabatabaei

    2015-09-01

    Full Text Available This article fully discusses the recent trends in the production of one the most attractive types of biofuels, i.e., biodiesel.with a focus on the existing obstacles for its large scale production. Moreover, recent innovations/improvements under three categories of upstream, mainstream, and downstream processes are also presented. Upstream strategies are mainly focused on seeking more sustainable oil feedstocks and/or enhancing the quality of waste-oriented ones. The mainstream strategies section highlights the numerous attempts made to enhance agitation efficiency including chemical and/or mechanical strategies. Finally, the innovative downstream strategies basically dealing with 1 separation of biodiesel and glycerin, 2 purification of biodiesel and glycerin, and 3 improving the characteristics of the produced fuel, are comprehensively reviewed.

  5. Recent developments in neutrino physics

    Energy Technology Data Exchange (ETDEWEB)

    Garvey, G.T.

    1991-01-01

    I shall attempt to summarize recent developments in the experimental situation in neutrino physics. The paper will deal with recent results, drawing on either published work or research that has been presented in preprint form, as there is an adequate supply of interesting and controversial data restricting oneself to these generally more reliable sources. The discussion of the theoretical implication of these experimental results will be presented in the following paper by Boris Kayser. The topics to be covered in this presentation are: direct measurements of {bar {nu}}{sub e} mass via beta endpoint studies; status of solar neutrino observations; status of 17-keV neutrino'' reports; and the use of {nu}p elastic scattering to determine the strange quark'' content of the proton. 2 refs., 15 figs., 9 tabs.

  6. Recent developments in neutrino physics

    International Nuclear Information System (INIS)

    Garvey, G.T.

    1991-01-01

    I shall attempt to summarize recent developments in the experimental situation in neutrino physics. The paper will deal with recent results, drawing on either published work or research that has been presented in preprint form, as there is an adequate supply of interesting and controversial data restricting oneself to these generally more reliable sources. The discussion of the theoretical implication of these experimental results will be presented in the following paper by Boris Kayser. The topics to be covered in this presentation are: direct measurements of bar ν e mass via beta endpoint studies; status of solar neutrino observations; status of ''17-keV neutrino'' reports; and the use of νp elastic scattering to determine the ''strange quark'' content of the proton. 2 refs., 15 figs., 9 tabs

  7. Recent developments in complex scaling

    International Nuclear Information System (INIS)

    Rescigno, T.N.

    1980-01-01

    Some recent developments in the use of complex basis function techniques to study resonance as well as certain types of non-resonant, scattering phenomena are discussed. Complex scaling techniques and other closely related methods have continued to attract the attention of computational physicists and chemists and have now reached a point of development where meaningful calculations on many-electron atoms and molecules are beginning to appear feasible

  8. Recent investigations on the tofet

    Directory of Open Access Journals (Sweden)

    Piero Bartoloni

    2016-12-01

    Full Text Available The sanctuary called tophet affected both scholars of the Phoenician and Punic world that the public concerned by the problems of the ancient world. Two recent works by Bruno D'Andrea and Valentina Melchiorri concern shrines called tophet. Bruno D'Andrea studied the sanctuaries of North Africa after the Roman conquest of the region. Valentina Melchiorri studies the sanctuary of Sulky, current Sant'Antioco, in southwestern Sardinia.

  9. Recent results from Jefferson Lab

    International Nuclear Information System (INIS)

    Smith, E.

    2000-01-01

    Precision measurements of the structure of nucleons and nuclei in the regime of strong interaction QCD are now possible with the availability of high current polarized electron beams, polarized targets, and recoil polarimeters, in conjunction with modern spectrometers and detector instrumentation. The authors present some recent results from the Jefferson Lab on the charge and current distributions of nucleons and nuclei. They also review measurements which relate physics at small distances to the regime where strong interaction QCD is the relevant theory

  10. Recent Advances in Electrochemical Glycobiosensing

    OpenAIRE

    Sánchez-Pomales, Germarie; Zangmeister, Rebecca A.

    2011-01-01

    Biosensors based on electrochemical transduction mechanisms have recently made advances into the field of glycan analysis. These glyco-biosensors offer simple, rapid, sensitive, and economical approaches to the measurement need for rapid glycan analysis for biomarker detection, cancer and disease diagnostics, and bioprocess monitoring of therapeutic glycoproteins. Although the prevalent methods of glycan analysis (high-performance liquid chromatography, mass spectrometry, and nuclear magnet...

  11. Recent Advances in Metallaaromatic Chemistry.

    Science.gov (United States)

    Frogley, Benjamin J; Wright, L James

    2018-02-09

    Metallaaromatics can be broadly defined as aromatic compounds in which one of the ring atoms is a transition metal. The metallabenzenes are one important class of these compounds that has undergone extensive study recently. Closely related species such as fused-ring metallabenzenes, heterometallabenzenes, π-coordinated metallabenzenes and metallabenzynes have also attracted considerable attention. Although many metallaaromatics can be considered as metalla-analogues of classic organic aromatic compounds, this is not always the case. Recent seminal studies have shown that metallapentalenes and metallapentalynes, which are metalla-analogues of the anti-aromatic compounds pentalene and pentalyne, are in fact aromatic and highly stable. Very unusual spiro-metallaaromatic compounds have also recently been isolated. In this concepts article, key features of all these intriguing metallaaromatic compounds are discussed with reference to the structural, spectroscopic, reactivity and theoretical studies that have been undertaken. These compounds continue to generate much interest, not only because of the contributions they make to fundamental chemical understanding, but also because of the promise of possible practical applications. © 2018 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim.

  12. Recent advances in Broomrapes research

    Directory of Open Access Journals (Sweden)

    MARIA GEVEZOVA

    2012-01-01

    Full Text Available Orobanchaceae (broomrapes is a morphologically diverse family of predominantly herbaceous, parasitic plants. The majority of species are facultative or obligate root parasites that subsist on broad-leaf plants, thereby depleting them of nutrients, minerals and water. The taxonomy status of the family Orobanchaceae among other flowering plants is often subject of debate. They possess only a few morphological features suitable for taxonomy purposes and yet even they are quite changeable. The variability within the species is too high and hampers the attempts to create proper determination keys. During last two decades several molecular markers were used for reevaluate taxonomy, biodiversity and phylogenetic relationships within the family. Recent investigations supported by molecular taxonomy analyses have resulted in re-definition of Orobanchaceae family. According to this classification Orobanchaceae consists of 89 genera, containing 2061 species. On the Balkans the family Orobanchaceae is represented by 3 genera: Orobanche includes 25 species; Phelipanche comprises of 9 species and some putative hybrids; Diphelypaea occurs with single species, Diphelypaea boissieri, in Macedonia and Greece. Only a few recent studies based on modern methods took place during last decade. Their findings confirmed differences between Phelipanche and Orobanche genera, but raised new question about their internal structure. Several broomrape species parasitize important crops. They are widely spread in Bulgaria, Southern Europe, Russia, Middle East and Northern Africa. They cause losses in crop productivity estimated at hundreds of millions of dollars annually than affect the livelihoods of 100 million farmers. A wide variety of approaches have been explored to control broomrapes, but none have been found to be sufficiently effective and affordable. The new findings about their life cycle and the recent genomic project focused on sequences of Ph. aegyptiaca genome

  13. Recent development of hydrodynamic modeling

    Science.gov (United States)

    Hirano, Tetsufumi

    2014-09-01

    In this talk, I give an overview of recent development in hydrodynamic modeling of high-energy nuclear collisions. First, I briefly discuss about current situation of hydrodynamic modeling by showing results from the integrated dynamical approach in which Monte-Carlo calculation of initial conditions, quark-gluon fluid dynamics and hadronic cascading are combined. In particular, I focus on rescattering effects of strange hadrons on final observables. Next I highlight three topics in recent development in hydrodynamic modeling. These include (1) medium response to jet propagation in di-jet asymmetric events, (2) causal hydrodynamic fluctuation and its application to Bjorken expansion and (3) chiral magnetic wave from anomalous hydrodynamic simulations. (1) Recent CMS data suggest the existence of QGP response to propagation of jets. To investigate this phenomenon, we solve hydrodynamic equations with source term which exhibits deposition of energy and momentum from jets. We find a large number of low momentum particles are emitted at large angle from jet axis. This gives a novel interpretation of the CMS data. (2) It has been claimed that a matter created even in p-p/p-A collisions may behave like a fluid. However, fluctuation effects would be important in such a small system. We formulate relativistic fluctuating hydrodynamics and apply it to Bjorken expansion. We found the final multiplicity fluctuates around the mean value even if initial condition is fixed. This effect is relatively important in peripheral A-A collisions and p-p/p-A collisions. (3) Anomalous transport of the quark-gluon fluid is predicted when extremely high magnetic field is applied. We investigate this possibility by solving anomalous hydrodynamic equations. We found the difference of the elliptic flow parameter between positive and negative particles appears due to the chiral magnetic wave. Finally, I provide some personal perspective of hydrodynamic modeling of high energy nuclear collisions

  14. Thermal methodology: recent developments; Methodologie thermique: developpements recents

    Energy Technology Data Exchange (ETDEWEB)

    Jumel, J.; Lepoutre, F.; Balageas, D. [Office National d' Etudes et de Recherches Aerospatiales (ONERA), 75 - Paris (France)]|[Centre National de la Recherche Scientifique (CNRS), 75 - Paris (France)]|[CEA Le Ripault, 37 - Tours (France)] [and others

    2001-07-01

    This conference day organized by the French society of thermal engineering (SFT) was devoted to the recent advances in thermal instrumentation. Eight papers were presented and were dealing with: the measurement of the microscopic thermal properties of C/C and C/C-SiC composite materials; the metrology of the local probe thermal microscopy (analysis of the probe-sample thermal interaction); the emission factor of semi-transparent materials at high temperature (2000 deg.C); the study of the tungsten-rhenium couples between 1000 and 2000 deg.C; the theoretical aspects of thermocouple instrumentation in the estimation of surface or interface thermal conditions; the microscale thermo-physical characterisation of metal coatings; the thermal microscopy measurement of the contact resistance of a metal inclusion in a thermoplastic matrix; and the application of laser-induced fluorescence in thermal metrology (from turbulence to combustion). (J.S.)

  15. Recent Progress in Quantum Hadrodynamics

    Energy Technology Data Exchange (ETDEWEB)

    John Dirk Walecka, Brian D. Serot

    1997-01-01

    Quantum hadrodynamics (QHD) is a framework for describing the nuclear many-body problem as a relativistic system of baryons and mesons. Motivation is given for the utility of such an approach and for the importance of basing it on a local, Lorentz-invariant lagrangian density. Calculations of nuclear matter and finite nuclei in both renormalizable and nonrenormalizable, effective QHD models are discussed. Connections are made between the effective and renormalizable models, as well as between relativistic mean-field theory and more sophisticated treatments. Recent work in QHD involving nuclear structure, electroweak interactions in nuclei, relativistic transport theory, nuclear matter under extreme conditions, and the evaluation of loop diagrams is reviewed.

  16. Recent Methodology in Ginseng Analysis

    Science.gov (United States)

    Baek, Seung-Hoon; Bae, Ok-Nam; Park, Jeong Hill

    2012-01-01

    As much as the popularity of ginseng in herbal prescriptions or remedies, ginseng has become the focus of research in many scientific fields. Analytical methodologies for ginseng, referred to as ginseng analysis hereafter, have been developed for bioactive component discovery, phytochemical profiling, quality control, and pharmacokinetic studies. This review summarizes the most recent advances in ginseng analysis in the past half-decade including emerging techniques and analytical trends. Ginseng analysis includes all of the leading analytical tools and serves as a representative model for the analytical research of herbal medicines. PMID:23717112

  17. Recent physics results from LEP

    International Nuclear Information System (INIS)

    Augustin, J.E.

    1990-12-01

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

  18. Recent trends in biocatalysis engineering.

    Science.gov (United States)

    Illanes, Andrés; Cauerhff, Ana; Wilson, Lorena; Castro, Guillermo R

    2012-07-01

    During the last 30 years the scope of biocatalysis has been expanding due to the advances in several technological fields. Diverse techniques as structural enzyme improvement (e.g. protein engineering, direct evolution), engineering approaches (e.g. ionic liquids, supercritical fluids) and physical stabilization (e.g. immobilization, CLEAS) have been developed, which in combination are powerful tools to improve biotransformation and to synthesize new products. In the present work, recent advances in biocatalysis are reviewed. Copyright © 2011 Elsevier Ltd. All rights reserved.

  19. Recent developments in switching theory

    CERN Document Server

    Mukhopadhyay, Amar

    2013-01-01

    Electrical Science Series: Recent Developments in Switching Theory covers the progress in the study of the switching theory. The book discusses the simplified proof of Post's theorem on completeness of logic primitives; the role of feedback in combinational switching circuits; and the systematic procedure for the design of Lupanov decoding networks. The text also describes the classical results on counting theorems and their application to the classification of switching functions under different notions of equivalence, including linear and affine equivalences. The development of abstract har

  20. Recent advances in metal carcinogenesis

    Energy Technology Data Exchange (ETDEWEB)

    Sunderman, F.W. Jr.

    Recent advances in metal carcinogenesis are comprehensively reviewed, including (a) epidemiological and clinical aspects, (b) carcinogenesis bioassays, (c) bacterial mutagenesis, (d) mammalian cell mutagenesis, (e) chromosomal damage, (f) mammalian cell transformation, (g) microsomal metabolism, (h) DNA strandbreaks and crosslinks, (i) DNA polymerase infidelity, (j) RNA strand initiation, and (k) helical transition of B-DNA to Z-DNA. Based upon these observations, several hypotheses are proposed for the molecular pathogenesis of carcinogenesis by metal compounds. These hypotheses are amenable to experimental test by existing techniques of molecular biology.

  1. Recent results for Mark III

    International Nuclear Information System (INIS)

    Brient, J.C.

    1987-12-01

    This paper presents recent results from the Mark III detector at SPEAR, in the open charm sector. The first topic discussed is the reanalysis of the direct measurement of the D hadronic branching fractions, where a detailed study has been made of the Cabibbo suppressed and multi-π 0 's D decays backgrounds in the double tag sample. Next, the Dalitz plot analysis of the D decays to Kππ is presented, leading to the relative fractions of three-body versus pseudoscalarvector decays. 7 refs., 5 figs

  2. Recent progress in ion sources

    International Nuclear Information System (INIS)

    Osher, J.E.

    1975-01-01

    This paper is intended to survey recent developments in ion sources, particularly work reported at the ''Symposium on Ion Sources and the Formation of Ion Beams'' held in Berkeley in October 1974. The approach here will be to subdivide this topic into three main areas; briefly list and discuss notable progress in each; and finally add some additional detail through a few specific, selected examples. The major items of progress discussed include development of large-area plasma surfaces for multiple- aperture ion sources, a significant increase in available negative-ion current densities, and improved general agreement between extraction electrode design and performance. (U.S.)

  3. Recent developments in bone scanning

    International Nuclear Information System (INIS)

    Ell, P.J.; Radia, R.G.; Jarritt, P.H.

    1981-01-01

    Progress in nuclear medicine is achieved through advances in radiopharmaceuticals, improvement in instrumentation design and improvement in data processing (computer hard- and software). With the appearance of the sup(99m)Tc-labelled phosphates, a major step towards finding ideal bone seeking tracers was undertaken. The more recent modifications of these tracers have tended to offer only minor advantages over and above what has already been achieved, i.e., improved skeletal uptake and somewhat faster blood clearance characteristics. Whilst computer hard- and software is undergoing constant streamlining (more power, in lesser space, with greater economy), instrumentation designs have matured. All of these techniques have relied upon conventional planar imaging and only very recently have alternative apparatuses appeared. The issue at stake is whether some form of tomographic imaging may have a role to play in the investigation of the skeleton. Important and inherent advantages occur if one is able to reconstruct data into tomograms: data interpretation is performed with the benefit of depth information, contrast resolution permits the visualization of structures previously masked and computer analysis permits the measurement of tracer uptake within well-defined sections of the organ or segment to be investigated. In this review, the authors offer original data which may provide some pointers as to future areas of application of this new approach. (Auth.)

  4. [Visual dependence after recent stroke].

    Science.gov (United States)

    Bonan, I; Derighetti, F; Gellez-Leman, M-C; Bradaï, N; Yelnik, A

    2006-05-01

    After chronic stroke, inability to use pertinent somatosensory or vestibular information have been described. The aim of the study was to determine whether visual dependence occurred early after stroke before rehabilitation. Thirty patients with recent hemiplegia (16 right and 14 left hemispheric stroke) performed the rod and frame test (RFT). Patients were asked to adjust the rod to the vertical position under 3 conditions: basically, with a frame tilted 18 degrees to the right and then with the frame tilted to the left. Bias in each condition (mean, SD) was recorded and compared to adjustments of the rod by 23 controls. Motor control, sensibility, functional level (functional independence measure), age, neglect, and then balance by the postural assessment scale for stroke were assessed. Fifty-six per cent (17/30) of patients but only 26% of controls were influenced by the tilt of the frame on the 2 sides (visual dependence). No correlation was found between visual dependence and the characteristics of the patients. Many patients with recent hemiplegia seem to rely on visual input. The mechanisms of such visual dependence are discussed. Rehabilitation programs should take into account the possible impairment of sensory organisation and should include exercises to be performed under visual disturbances.

  5. Recent applications of peanut phytoalexins.

    Science.gov (United States)

    Holland, Kevin W; O'Keefe, Sean F

    2010-11-01

    The search for natural alternatives to synthetic antioxidants and antimicrobials is growing tremendously as consumers become concerned with currently used compounds. Peanut phytoalexins may become a viable source of these compounds. Recent developments have shown compounds derived from peanuts possess both high antioxidant activity and antimicrobial capabilities. Some of these compounds have been identified as stilbenes and other low molecular weight phenolic compounds. Patents have been awarded for increasing the amounts of these compounds in peanut plants and in the peanut seeds. Increasing phytoalexins in peanut seeds may provide a method to increase dietary consumption of these compounds. In addition to their use as antioxidants and antimicrobials, peanut phytoalexins may possess beneficial health effects. Studies have shown these compounds to have anti-diabetic, anticancer, and vasodilatory effects. Many of the recent patents concerning peanut phytoalexins focus on this area with patents being submitted for synergistic effects with chemotherapy drugs and treatment of diabetes and hepatitis B. Peanut phytoalexins may not only be able to replace synthetic food ingredients, but may also treat diseases that currently plague the human population.

  6. Recent Advances in Electrochemical Immunosensors

    Directory of Open Access Journals (Sweden)

    Benoît Piro

    2017-04-01

    Full Text Available Immunosensors have experienced a very significant growth in recent years, driven by the need for fast, sensitive, portable and easy-to-use devices to detect biomarkers for clinical diagnosis or to monitor organic pollutants in natural or industrial environments. Advances in the field of signal amplification using enzymatic reactions, nanomaterials such as carbon nanotubes, graphene and graphene derivatives, metallic nanoparticles (gold, silver, various oxides or metal complexes, or magnetic beads show how it is possible to improve collection, binding or transduction performances and reach the requirements for realistic clinical diagnostic or environmental control. This review presents these most recent advances; it focuses first on classical electrode substrates, then moves to carbon-based nanostructured ones including carbon nanotubes, graphene and other carbon materials, metal or metal-oxide nanoparticles, magnetic nanoparticles, dendrimers and, to finish, explore the use of ionic liquids. Analytical performances are systematically covered and compared, depending on the detection principle, but also from a chronological perspective, from 2012 to 2016 and early 2017.

  7. Recent Advances in Electrochemical Immunosensors

    Science.gov (United States)

    Piro, Benoît; Reisberg, Steeve

    2017-01-01

    Immunosensors have experienced a very significant growth in recent years, driven by the need for fast, sensitive, portable and easy-to-use devices to detect biomarkers for clinical diagnosis or to monitor organic pollutants in natural or industrial environments. Advances in the field of signal amplification using enzymatic reactions, nanomaterials such as carbon nanotubes, graphene and graphene derivatives, metallic nanoparticles (gold, silver, various oxides or metal complexes), or magnetic beads show how it is possible to improve collection, binding or transduction performances and reach the requirements for realistic clinical diagnostic or environmental control. This review presents these most recent advances; it focuses first on classical electrode substrates, then moves to carbon-based nanostructured ones including carbon nanotubes, graphene and other carbon materials, metal or metal-oxide nanoparticles, magnetic nanoparticles, dendrimers and, to finish, explore the use of ionic liquids. Analytical performances are systematically covered and compared, depending on the detection principle, but also from a chronological perspective, from 2012 to 2016 and early 2017. PMID:28387718

  8. Recent advances in azaborine chemistry.

    Science.gov (United States)

    Campbell, Patrick G; Marwitz, Adam J V; Liu, Shih-Yuan

    2012-06-18

    The chemistry of organoboron compounds has been primarily dominated by their use as powerful reagents in synthetic organic chemistry. Recently, the incorporation of boron as part of a functional target structure has emerged as a useful way to generate diversity in organic compounds. A commonly applied strategy is the replacement of a CC unit with its isoelectronic BN unit. In particular, the BN/CC isosterism of the ubiquitous arene motif has undergone a renaissance in the past decade. The parent molecule of the 1,2-dihydro-1,2-azaborine family has now been isolated. New mono- and polycyclic B,N heterocycles have been synthesized for potential use in biomedical and materials science applications. This review is a tribute to Dewar's first synthesis of a monocyclic 1,2-dihydro-1,2-azaborine 50 years ago and discusses recent advances in the synthesis and characterization of heterocycles that contain carbon, boron, and nitrogen. Copyright © 2012 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.

  9. Recent advances in understanding dengue

    Science.gov (United States)

    Yacoub, Sophie; Mongkolsapaya, Juthathip; Screaton, Gavin

    2016-01-01

    Dengue is an emerging threat to billions of people worldwide. In the last 20 years, the incidence has increased four-fold and this trend appears to be continuing. Caused by one of four viral serotypes, dengue can present as a wide range of clinical phenotypes with the severe end of the spectrum being defined by a syndrome of capillary leak, coagulopathy, and organ impairment. The pathogenesis of severe disease is thought to be in part immune mediated, but the exact mechanisms remain to be defined. The current treatment of dengue relies on supportive measures with no licensed therapeutics available to date. There have been recent advances in our understanding of a number of areas of dengue research, of which the following will be discussed in this review: the drivers behind the global dengue pandemic, viral structure and epitope binding, risk factors for severe disease and its pathogenesis, as well as the findings of recent clinical trials including therapeutics and vaccines. We conclude with current and future dengue control measures and key areas for future research. PMID:26918159

  10. Recent advances in understanding dengue.

    Science.gov (United States)

    Yacoub, Sophie; Mongkolsapaya, Juthathip; Screaton, Gavin

    2016-01-01

    Dengue is an emerging threat to billions of people worldwide. In the last 20 years, the incidence has increased four-fold and this trend appears to be continuing. Caused by one of four viral serotypes, dengue can present as a wide range of clinical phenotypes with the severe end of the spectrum being defined by a syndrome of capillary leak, coagulopathy, and organ impairment. The pathogenesis of severe disease is thought to be in part immune mediated, but the exact mechanisms remain to be defined. The current treatment of dengue relies on supportive measures with no licensed therapeutics available to date. There have been recent advances in our understanding of a number of areas of dengue research, of which the following will be discussed in this review: the drivers behind the global dengue pandemic, viral structure and epitope binding, risk factors for severe disease and its pathogenesis, as well as the findings of recent clinical trials including therapeutics and vaccines. We conclude with current and future dengue control measures and key areas for future research.

  11. Overview of recent ALICE results

    CERN Document Server

    Gunji, Taku

    2016-01-01

    The ALICE experiment explores the properties of strongly interacting QCD matter at extremely high temperatures created in Pb-Pb collisions at LHC and provides further insight into small-system physics in (high-multiplicity) pp and p-Pb collisions. The ALICE collaboration presented 27 parallel talks, 50 posters, and 1 flash talk at Quark Matter 2015 and covered various topics including collective dynamics, correlations and fluctuations, heavy flavors, quarkonia, jets and high $p_{\\rm T}$ hadrons, electromagnetic probes, small system physics, and the upgrade program. This paper highlights some of the selected results.

  12. Recent advances in epilepsy genetics.

    Science.gov (United States)

    Orsini, Alessandro; Zara, Federico; Striano, Pasquale

    2018-02-22

    In last few years there has been rapid increase in the knowledge of epilepsy genetics. Nowadays, it is estimated that genetic epilepsies include over than 30% of all epilepsy syndromes. Several genetic tests are now available for diagnostic purposes in clinical practice. In particular, next-generation sequencing has proven to be effective in revealing gene mutations causing epilepsies in up to a third of the patients. This has lead also to functional studies that have given insight into disease pathophysiology and consequently to the identification of potential therapeutic targets opening the way of precision medicine for epilepsy patients. This minireview is focused on the most recent advances in genetics of epilepsies. We will also overview the modern genomic technologies and illustrate the diagnostic pathways in patients with genetic epilepsies. Finally, the potential implications for a personalized treatment (precision medicine) are also discussed. Copyright © 2017 Elsevier B.V. All rights reserved.

  13. Recent Advances in Superhydrophobic Electrodeposits

    Directory of Open Access Journals (Sweden)

    Jason Tam

    2016-03-01

    Full Text Available In this review, we present an extensive summary of research on superhydrophobic electrodeposits reported in the literature over the past decade. As a synthesis technique, electrodeposition is a simple and scalable process to produce non-wetting metal surfaces. There are three main categories of superhydrophobic surfaces made by electrodeposition: (i electrodeposits that are inherently non-wetting due to hierarchical roughness generated from the process; (ii electrodeposits with plated surface roughness that are further modified with low surface energy material; (iii composite electrodeposits with co-deposited inert and hydrophobic particles. A recently developed strategy to improve the durability during the application of superhydrophobic electrodeposits by controlling the microstructure of the metal matrix and the co-deposition of hydrophobic ceramic particles will also be addressed.

  14. Concentrations: Recent Developments in Italy

    Directory of Open Access Journals (Sweden)

    Claudio Tesauro

    2015-10-01

    Full Text Available Recent Italian developments in antitrust concentrations was the topic I was assigned to address at the conference held on 23 April to celebrate the first anniversary of the Italian Antitrust Review. What is immediately clear is that far fewer concentrations have been notified over the last few years. This is probably due to the economic crisis, which caused a reduction in corporate transactions; but also the changes to the turnover thresholds for notification seem to have had a significant impact. Consequently, an interesting debate is underway regarding the need for further changes the threshold system. Moreover, the drastic market developments and the subsequent increased number of decisions to revise remedies should also be further examined. These two issues are the subject of this paper.

  15. Epigenesis in Kant: Recent reconsiderations.

    Science.gov (United States)

    Zammito, John H

    2016-08-01

    Epigenesis has become a far more exciting issue in Kant studies recently, especially with the publication of Jennifer Mensch's Kant' Organicism. In my commentary, I propose to clarify my own position on epigenesis relative to that of Mensch and others by once again considering the discourse of epigenesis in the wider eighteenth century. Historically, I maintain that Kant was never fully an epigenesist because he feared its materialist implications. This makes it highly unlikely that he drew heavily, as other interpreters like Dupont and Huneman have suggested, on Caspar Friedrich Wolff for his ultimate theory of "generic preformation." In order to situate more precisely what Kant made of epigenesis, I distinguish his metaphysical use, as elaborated by Mensch, from his view of it as a theory for life science. In that light, I raise questions about the scope and authority of philosophy vis a vis natural science. Copyright © 2016 Elsevier Ltd. All rights reserved.

  16. Recent research in snow hydrology

    Science.gov (United States)

    Dozier, Jeff

    1987-01-01

    Recent work on snow-pack energy exchange has involved detailed investigations on snow albedo and attempts to integrate energy-balance calculations over drainage basins. Along with a better understanding of the EM properties of snow, research in remote sensing has become more focused toward estimation of snow-pack properties. In snow metamorphism, analyses of the physical processes must now be coupled to better descriptions of the geometry of the snow microstructure. The dilution method now appears to be the best direct technique for measuring the liquid water content of snow; work on EM methods continues. Increasing attention to the chemistry of the snow pack has come with the general focus on acid precipitation in hydrology.

  17. Recent developments in quantum mechanics

    International Nuclear Information System (INIS)

    Piron, C.

    1989-01-01

    It is essentially a review of recent progress in Quantum Mechanics obtained by the ''Geneva School'', put all together in a synthesis for the first time. During these twelve last years Quantum Mechanics has developed deeply in three aspects: 1) the interpretation has been completely clarified but many ''senior'' physicists delight in the mystery of their school-days Quantum Mechanics and do not want to change their minds. 2) The formalism has been developed and generalized to many (if it is not all) physical situations. 3) Many new rules of calculation have been developed. In conclusion many paradoxes and/or unsolved problems have been solved and many calculations which usually appear just as tricks can be explained and justified. I want here to give a brief survey of each one of these three points and to end by some examples which show the power and the efficiency of this new theory. (orig.)

  18. Recent advances on tea polyphenols

    Science.gov (United States)

    Kanwar, Jyoti; Taskeen, Mujtaba; Mohammad, Imthiyaz; Huo, Congde; Chan, Tak Hang; Dou, Qing Ping

    2012-01-01

    Over the past decade many scientific and medical studies have focused on green tea for its long-purported health benefits. There is convincing evidence that tea is a cup of life. It has multiple preventive and therapeutic effects. This review thus focuses on the recent advances of tea polyphenols and their applications in the prevention and treatment of human cancers. Of the various polyphenols in tea, (−)-Epigallocatechin-3-gallate (EGCG) is the most abundant, and active compound studied in tea research. EGCG inhibits several molecular targets to inhibit cancer initiation and modulates several essential survival pathways to block cancer progression. Herein, we describe the various mechanisms of action of EGCG and also discuss previous and current ongoing clinical trials of EGCG and green tea polyphenols in different cancer types. PMID:22201858

  19. Recent results on Tore Supra

    International Nuclear Information System (INIS)

    Moreau, D.

    1995-01-01

    Recent results regarding heating, confinement, current drive and profile modifications, heat and particle exhaust are reported. Improved core confinement is obtained after pellet injection (PEP) or Lower Hybrid current drive (LHEP) and may be linked with small - or reversed - central magnetic shear. Conversely, by increasing the magnetic shear in the gradient region, both LHCD and fast wave electron heating (FWEH) have produced improved global confinement was carried by the bootstrap current. Fast wave current drive has been observed at the level of 80 kA in a 0.4 MA discharge. In the ergodic divertor configuration, stable radiative layers were obtained with neon injection. At least 80% of a total of 7 MW injected power were radiated without confinement degradation or impurity accumulation. Finally, the heat exhaust capability of the various actively cooled plasma facing components is briefly described. (author) 14 refs.; 13 figs

  20. Recent trends in computational photonics

    CERN Document Server

    Benson, Trevor; Rue, Richard; Wurtz, Gregory

    2017-01-01

    This book brings together the recent cutting-edge work on computational methods in photonics and their applications. The latest advances in techniques such as the Discontinuous Galerkin Time Domain method, Finite Element Time Domain method, Finite Difference Time Domain method as well as their applications are presented. Key aspects such as modelling of non-linear effects (Second Harmonic Generation, lasing in fibers, including gain nonlinearity in metamaterials), the acousto-optic effect, and the hydrodynamic model to explain electron response in nanoplasmonic structures are included. The application areas covered include plasmonics, metamaterials, photonic crystals, dielectric waveguides, fiber lasers. The chapters give a representative survey of the corresponding area. .

  1. Milnacipran: recent findings in depression

    Directory of Open Access Journals (Sweden)

    Guest editors: Stuart Montgomery (London

    2010-08-01

    Full Text Available EDITORIAL FOREWORDPage 1   Milnacipran: recent findings in depression Stuart Montgomery (London, UK and Mike Briley (Castres, France REVIEWSPage 3   Suicidality: risk factors and the effects of antidepressants. The example of parallel reduction of suicidality and other depressive symptoms during treatment with the SNRI, milnacipran Philippe Courtet (Montpellier, FrancePage 9   Treatment of patients with comorbid depression and diabetes with metformin and milnacipran Peter Hofmann (Graz, AustriaPage 17  Antidepressant therapy with milnacipran and venlafaxine Lucilla Mansuy (Toulouse, FrancePage 23  Milnacipran: a unique antidepressant? Siegfried Kasper and Gerald Pail (Vienna, Austria This supplement is based on a symposium that took place at the 9th International Forum on Mood and Anxiety in Monte Carlo in November 2009 and is supported by an unconditional education grant from Pierre Fabre Médicament.

  2. Recent progress in prominence seismology.

    Science.gov (United States)

    Ballester, José Luis

    2006-02-15

    Prominence seismology is a rapidly developing topic which seeks to infer the internal structure and properties of solar prominences from the study of their oscillations. An extense observational background about oscillations in quiescent solar prominences has been gathered during the last 70 years. These observations point out the existence of two different types of oscillations: flare-induced oscillations (winking filaments) which affect the whole prominence and are of large amplitude and small amplitude oscillations which seem to be of local nature. From the theoretical point of view, few models have been set up to explain the phenomenon of winking filaments while, on the contrary, for small amplitude oscillations a large number of models trying to explain the observed features have been proposed. Here, recent theoretical and observational developments on both types of oscillations are reviewed, and suggestions about future research topics which should provide us with a more in-depth knowledge of solar prominences are made.

  3. Recent ATLAS Heavy Ion results

    CERN Multimedia

    CERN. Geneva

    2012-01-01

    Lead nucleus collisions in the LHC recreate the state of matter which existed when the universe was a few microseconds old. This super-hot matter, composed of quark and gluons, emits thousands of particles as it expands, cools and converts back into hadrons. The ATLAS detector provides an excellent opportunity to perform detailed studies of this novel state of matter, measuring its bulk properties and its response to penetrating probes. Recent studies of particle correlations and fluctuations shed light on the initial geometry and its evolution into the final state. Studies of jet suppression and fragmentation show how the energetic partons interact with the medium. High precision measurements of boson production and first results on boson-jet correlations are important steps towards quantitative understanding of the parton energy loss mechanism.

  4. Recent advances in computational aerodynamics

    Science.gov (United States)

    Agarwal, Ramesh K.; Desse, Jerry E.

    1991-04-01

    The current state of the art in computational aerodynamics is described. Recent advances in the discretization of surface geometry, grid generation, and flow simulation algorithms have led to flowfield predictions for increasingly complex and realistic configurations. As a result, computational aerodynamics is emerging as a crucial enabling technology for the development and design of flight vehicles. Examples illustrating the current capability for the prediction of aircraft, launch vehicle and helicopter flowfields are presented. Unfortunately, accurate modeling of turbulence remains a major difficulty in the analysis of viscosity-dominated flows. In the future inverse design methods, multidisciplinary design optimization methods, artificial intelligence technology and massively parallel computer technology will be incorporated into computational aerodynamics, opening up greater opportunities for improved product design at substantially reduced costs.

  5. Recent advances in computational optimization

    CERN Document Server

    2013-01-01

    Optimization is part of our everyday life. We try to organize our work in a better way and optimization occurs in minimizing time and cost or the maximization of the profit, quality and efficiency. Also many real world problems arising in engineering, economics, medicine and other domains can be formulated as optimization tasks. This volume is a comprehensive collection of extended contributions from the Workshop on Computational Optimization. This book presents recent advances in computational optimization. The volume includes important real world problems like parameter settings for con- trolling processes in bioreactor, robot skin wiring, strip packing, project scheduling, tuning of PID controller and so on. Some of them can be solved by applying traditional numerical methods, but others need a huge amount of computational resources. For them it is shown that is appropriate to develop algorithms based on metaheuristic methods like evolutionary computation, ant colony optimization, constrain programming etc...

  6. Recent Advances in Electrochemical Glycobiosensing

    Directory of Open Access Journals (Sweden)

    Germarie Sánchez-Pomales

    2011-01-01

    Full Text Available Biosensors based on electrochemical transduction mechanisms have recently made advances into the field of glycan analysis. These glyco-biosensors offer simple, rapid, sensitive, and economical approaches to the measurement need for rapid glycan analysis for biomarker detection, cancer and disease diagnostics, and bioprocess monitoring of therapeutic glycoproteins. Although the prevalent methods of glycan analysis (high-performance liquid chromatography, mass spectrometry, and nuclear magnetic resonance spectroscopy provide detailed identification and structural analysis of glycan species, there are significantly few low-cost, rapid glycan assays available for diagnostic and screening applications. Here we review instances in which glyco-biosensors have been used for glycan analysis using a variety of electrochemical transduction mechanisms (e.g., amperometric, potentiometric, impedimetric, and voltammetric, selective binding agents (e.g., lectins and antibodies, and redox species (e.g., enzyme substrates, inorganic, and nanomaterial.

  7. Recent Science Campaigns at HAARP

    Science.gov (United States)

    McCoy, R. P.; Bristow, W. A.; Fallen, C. T.

    2017-12-01

    Experiments in HF ionospheric heating using the High­frequency Active Auroral Research Program (HAARP) facilities have tremendous potential for informing our investigation of the Earth's upper atmosphere, ionosphere, and magnetosphere. They provide a unique opportunity for quantifying and modeling the multi­scale coupled processes that characterize the interactions between the plasma in near­Earth space, the Earth's magnetic field, and the neutral gasses of the atmosphere. Physical parameters of the region are often difficult to measure with ground­based instruments, and the measurements that are possible are often poorly resolved in range or time or unavailable outside narrow altitude regimes. HF ionospheric modification experiments allow us to measure ionospheric and thermospheric state parameters more systematically and over a broader range of conditions than would otherwise be possible. HAARP is the world's most powerful and most flexible HF transmitting facility, capable of generating 3.6 MW of RF power over a frequency range from about 2 MHz to about 10 MHz. The electronic phased array antenna provides the ability to direct the RF energy to a large region of the sky above Alaska. HAARP was constructed through a research program managed by the Air Force Research Laboratory (AFRL), and the Office of Naval Research (ONR). It was jointly funded by AFRL, ONR, and the Defense Advanced Projects Research Agency (DARPA). These agencies ended of their program of HAARP research in 2014, and donated the site equipment to the University of Alaska, Fairbanks (UAF), in the summer of 2015, who now operate the facility as an international observatory for radio plasma heating and subauroral physics. Since taking control of HAARP, UAF has carried out research campaigns in February 2017, and September 2017. The topics investigated in the campaigns included the physics of ionospheric irregularities (FAI), the stimulated electromagnetic emissions (SEE), generation of optical

  8. Recent developments in Lambda networking

    Science.gov (United States)

    de Laat, C.; Grosso, P.

    About 6 years ago the first baby-steps were made on opening up dark fiber and DWDM infrastructure for direct use by ISP's after the transformation of the old style Telecom sector into a market driven business. Since then Lambda workshops, community groups like GLIF and a number of experiments have led to many implementations of hybrid national research and education networks and lightpath-based circuit exchanges as pioneered by SURFnet in GigaPort and NetherLight in collaboration with StarLight in Chicago and Canarie in Canada. This article looks back on those developments, describes some current open issues and research developments and proposes a concept of terabit networking.

  9. Recent developments in nuclear instruments

    International Nuclear Information System (INIS)

    Vaidya, P.P.

    2004-01-01

    Full text : Nuclear Instrumentation is a field of vital importance for DAE. It has important applications in many areas of interest such as Reactor Monitoring and control, Accelerator based research, Laser and nuclear physics experiments, Health and environmental monitoring, Astrophysics experiments etc. It is a specialized field involving expertise in detection of radioactivity down to the level of few events per minute as well as processing and analysis of signals which can be as small as few hundred micro volts embedded in noise. Some applications involve digitizing and processing these signals with 0.001% accuracy and timing accuracies of a fraction of nano sec. Rapid developments in semiconductor related technologies have influenced the field of nuclear instrumentation. Development of FPGA's and ASIC's have made it possible to develop miniaturized smart and portable instruments for field applications. Advancements in field of computers, communications and various field buses have been successfully utilized for smart, portable and DSP based instrumentation. Smart sensor with detector and front-end electronics on a single silicon chip is now a reality. These instruments are also made intelligent by addition of fuzzy logic, artificial neural networks and expert systems. Electronics Division of BARC has made significant contribution to the field of nuclear instrumentation to achieve self-reliance in this area. This has also led to development of several new methods, which have been published in international journals and appreciated worldwide. As a step towards achieving complete self-reliance a programme for development of FPGA's, HMC's and ASIC's has been undertaken and is being followed with special emphasis. This also includes development of detector and front- end electronics on a single chip. This talk brings out details of these developments and describes the 'state of art' work done in India

  10. Some recent results from CLEO II

    Energy Technology Data Exchange (ETDEWEB)

    Kass, R. [Ohio State Univ., Columbus, OH (United States). Dept. of Physics

    1997-06-01

    The CLEO experiment has been operating for several years now collecting e{sup +}e{sup {minus}} annihilation data at and near the {Upsilon}(4S) resonance (E{sub cm} {approx} 10.6 GeV). The accumulated event sample contains several million B{anti B} and {tau}{sup +}{tau}{sup {minus}} pairs. These data are used to explore rare b, c, and {tau} decays. In this report, several recent CLEO results in the area of B-meson and {tau} decay are presented. The topics covered include: penguin decays of B-mesons, measurement of exclusive b {r_arrow} u semileptonic transitions, {tau} decays with an {eta} in the final state, precision measurement of the Michel parameters in leptonic {tau} decay, and a search for lepton number violation using {tau}`s. 39 refs., 26 figs.

  11. Latin America; Recent History; Democracy; Historical Memory

    Directory of Open Access Journals (Sweden)

    Guillermo MIRA DELLI-ZOTTI

    2011-05-01

    Full Text Available This article identifies the restoration of the democracy and its persistence as one of the most remarkable facts of the recent history of Latin America. Nevertheless, in the experience of the subcontinent, democracy does not appear like synonymous of democratization. Starting off with the transitions, this article is led toward a periodic analysis of the so-called democratic crossing of Latin America. At the same time, it studies the unequal incidence that the impact of the «historical memory» has had in the public sphere of countries like Argentina, Chile, Uruguay, El Salvador and Guatemala, contrasting with the case of Brazil.

  12. Recent results from the HAWC observatory

    Science.gov (United States)

    Salesa Greus, F.

    2017-05-01

    The High-Altitude Water Cherenkov Observatory (HAWC) is a TeV gamma-ray detector located at an altitude of 4100 meters on the slope of the Sierra Negra volcano in Puebla, Mexico. Inaugurated in March 2015, HAWC observes 65% of the sky every day with more than 90% duty cycle and an excellent angular resolution. HAWC plays an important role as a survey instrument for multi-wavelength studies, and presently is the most sensitive instrument to detect transients and extended sources of gamma-rays at multi-TeV energies. In this contribution I present the recent results from the experiment and discuss the future goals of the Collaboration.

  13. Recent results from TRISTAN at KEK

    Energy Technology Data Exchange (ETDEWEB)

    Suzuki, Shiro [Nagoya Univ., Chikusa-ku (Japan)

    1994-12-01

    Recent results of the TRISTAN experiment with high luminosity runs are reviewed. Updated results on lepton and quark pair production in the annihilation processes are presented, and limits on the compositeness scale and lower mass limit for extra Z bosons are given. The total hadronic cross section is presented in the effective Born approximation. A search for a resonance suggested by the L3 group is done in several different final states. The strong coupling constant {alpha}{sub s} is derived from several observables with an improved theoretical framework. The running nature of {alpha}{sub s} is studied in comparison with PEP4 and ALEPH data. Various properties of quark and gluon jets are examined. Hard scattering of two photons is established and these data provide information on quark and gluon distributions in the photon.

  14. Patellar tendinopathy - recent developments toward treatment.

    Science.gov (United States)

    Christian, Robert A; Rossy, William H; Sherman, Orrin H

    2014-01-01

    Patellar tendinopathy (PT) is a clinical and chronic overuse condition of unknown pathogenesis and etiology marked by anterior knee pain typically manifested at the inferior pole of the patella. PT has been referred to as "jumper's knee" since it is particularly common among populations of jumping athletes, such as basketball and volleyball players. Due to its common refractory response to conservative treatment, a variety of new treatments have emerged recently that include dry-needling, sclerosing injections, platelet-rich plasma therapy, arthroscopic surgical procedures, surgical resection of the inferior patellar pole, extracorporeal shock wave treatment, and hyperthermia thermotherapy. Since PT has an unknown pathogenesis and etiology, PT treatment is more a result of physician experience than evidence-based science. This review will summarize the current literature on this topic, identify current research efforts aimed to understand the pathological changes in abnormal tendons, provide exposure to the emerging treatment techniques, and provide suggested direction for future research.

  15. The coso EGS project - Recent developments

    Science.gov (United States)

    Rose, P.; Sheridan, J.; McCulloch, J.; Moore, J.N.; Kovac, K.; Weidler, R.; Hickman, S.

    2005-01-01

    An Enhanced Geothermal System (EGS) field experiment will be conducted to hydraulically stimulate injection well 34-9RD2, located on the east flank of the Coso geothermal reservoir, with the objective of increasing the injection rate of this well to 750 gpm at a wellhead pressure of 100 psi or less. The stimulation of this well is expected to create hydraulic communication with the recently drilled production well 38C-9, which is directly south of 34-9RD2. We summarize the results of fracture and stress analyses based upon borehole image logs of 38C-9; petrographic and petrologic analyses of cuttings from both the injection well 34-9RD2 and the production well 38C-9; and plans for the redrilling and stimulation of 34-9RD2.

  16. Recent development of transient electronics

    Directory of Open Access Journals (Sweden)

    Huanyu Cheng

    2016-01-01

    Full Text Available Transient electronics are an emerging class of electronics with the unique characteristic to completely dissolve within a programmed period of time. Since no harmful byproducts are released, these electronics can be used in the human body as a diagnostic tool, for instance, or they can be used as environmentally friendly alternatives to existing electronics which disintegrate when exposed to water. Thus, the most crucial aspect of transient electronics is their ability to disintegrate in a practical manner and a review of the literature on this topic is essential for understanding the current capabilities of transient electronics and areas of future research. In the past, only partial dissolution of transient electronics was possible, however, total dissolution has been achieved with a recent discovery that silicon nanomembrane undergoes hydrolysis. The use of single- and multi-layered structures has also been explored as a way to extend the lifetime of the electronics. Analytical models have been developed to study the dissolution of various functional materials as well as the devices constructed from this set of functional materials and these models prove to be useful in the design of the transient electronics.

  17. Recent situations around nuclear ships

    International Nuclear Information System (INIS)

    Mizuno, Hiroshi

    1978-01-01

    The philosophy when the safety standard for nuclear ships is drawn up and the international rules specifically for nuclear ships are summarized. As for the safety standard for nuclear ships, the safety requirements for ordinary ships, for the ships transporting nuclear reactors, for ordinary nuclear reactors, and for the reactors moving around the seas must be included. As for the international rules for nuclear ships, there are chapter 8 ''Nuclear ships'' in the International Convention on the Safety of Life at Sea, 1960 and 1974, and Safety Consideration in the Use of Ports and Approaches by Nuclear Merchant Ships. Also there are national rules and standards in Japan and foreign countries. One of the means to explore the practicality of nuclear ships is the investigation of the economy. At this time, the social merits and demerits of nuclear ships must be compared with conventional ships by taking total expenses into account without omission. When oil is depleted, the age of nuclear ships will not necessarily begin, and the will be still some competitors. The investigations concerning the economy of nuclear ships have been carried out in various countries. The present state of the development of nuclear ships in Japan and foreign countries is explained. Many conferences and symposia have been held concerning nuclear ships, and those held recently are enumerated. The realization of nuclear ship age cannot be anticipated from existing papers and shipbuilding projects. (Kako, I.)

  18. Recent Trends in Antitrust Enforcement

    Directory of Open Access Journals (Sweden)

    Mario Siragusa

    2015-10-01

    Full Text Available This article intends to discuss a selection of the most relevant features of the most recent trends in antitrust enforcement. Firstly, anticompetitive signalling will be addressed: its assessment depends on the kind of information provided. Where such information is of public knowledge or is very well known by the market participants, signalling should not be deemed as anticompetitive. Secondly, the Power Cable case has raised for the first time various problematic issues, such as the possibility to impose parental liability on a purely financial investor, even where the presumed direct infringer would have been able to pay the fine. This appears to be irreconcilable with the objectives for which the case law on parental liability has been elaborated. Thirdly, as to the concept of restriction of competition by object, it is argued that the Intel case does not disavow the principles established in Cartes Bancaires. Indeed, the finding of a violation and the different methodology applied in the first case are only due to its specific factual circumstances. Finally, the nouvelle vague of the case law on the anticompetitive abuse of rights has led to two opposite approaches, one at the EU and the other at the Italian level. The first one, based on the finding of objective circumstances, is perfectly consistent with existing EU case law, while the second, exclusively focused on the exclusionary intent, seems to be in sharp contrast with it. The hope is that the Court of Justice will intervene to resolve this contradiction.

  19. Recent advances in nuclear cardiology

    International Nuclear Information System (INIS)

    Lee, Won Woo

    2016-01-01

    Nuclear cardiology is one of the major fields of nuclear medicine practice. Myocardial perfusion studies using single-photon emission computed tomography (SPECT) have played a crucial role in the management of coronary artery diseases. Positron emission tomography (PET) has also been considered an important tool for the assessment of myocardial viability and perfusion. However, the recent development of computed tomography (CT)/magnetic resonance imaging (MRI) technologies and growing concerns about the radiation exposure of patients remain serious challenges for nuclear cardiology. In response to these challenges, remarkable achievements and improvements are currently in progress in the field of myocardial perfusion imaging regarding the applicable software and hardware. Additionally, myocardial perfusion positron emission tomography (PET) is receiving increasing attention owing to its unique capability of absolute myocardial blood flow estimation. An F-18-labeled perfusion agent for PET is under clinical trial with promising interim results. The applications of F-18 fluorodeoxyglucose (FDG) and F-18 sodium fluoride (NaF) to cardiovascular diseases have revealed details on the basic pathophysiology of ischemic heart diseases. PET/MRI seems to be particularly promising for nuclear cardiology in the future. Restrictive diseases, such as cardiac sarcoidosis and amyloidosis, are effectively evaluated using a variety of nuclear imaging tools. Considering these advances, the current challenges of nuclear cardiology will become opportunities if more collaborative efforts are devoted to this exciting field of nuclear medicine

  20. Recent space nuclear power systems

    International Nuclear Information System (INIS)

    Takizuka, Takakazu; Yasuda, Hideshi; Hishida, Makoto

    1991-01-01

    For the advance of mankind into the space, the power sources of large output are indispensable, and it has been considered that atomic energy is promising as compared with solar energy and others. Accordingly in USA and USSR, the development of the nuclear power generation systems for space use has been carried out since considerable years ago. In this report, the general features of space nuclear reactors are shown, and by taking the system for the SP-100 project being carried out in USA as the example, the contents of the recent design regarding the safety as an important factor are discussed. Moreover, as the examples of utilizing space nuclear reactors, the concepts of the power source for the base on the moon, the sources of propulsive power for the rockets used for Mars exploration and others, the remote power transmission system by laser in the space and so on are explained. In September, 1988, the launching of a space shuttle of USA was resumed, and the Jupiter explorer 'Galileo' and the space telescope 'Hubble' were successfully launched. The space station 'Mir' of USSR has been used since February, 1986. The history of the development of the nuclear power generation systems for space use is described. (K.I.)

  1. Small gauge vitrectomy: Recent update

    Science.gov (United States)

    Khanduja, Sumeet; Kakkar, Ashish; Majumdar, Saptrishi; Vohra, Rajpal; Garg, Satpal

    2013-01-01

    Small gauge vitrectomy, also known as minimally invasive vitreous surgery (MIVS), is a classic example of progress in biomedical engineering. Disparity in conjunctival and scleral wound location and reduction in wound diameter are its core principles. Fluidic changes include increased pressure head loss with consequent reduction in infusional flow rate and use of higher aspiration vacuum at the cutter port. Increase An increase in port open/port closed time maintains an adequate rate of vitreous removal. High Intensity Discharge (HID) lamps maintain adequate illumination in spite of a decrease in the number of fiberoptic fibers. The advantages of MIVS are, a shorter surgical time, minimal conjunctival damage, and early postoperative recovery. Most complications are centered on wound stability and risk of postoperative hypotony, endophthalmitis, and port site retinal break formation. MIVS is suited in most cases, however, it can cause dehiscence of recent cataract wounds. Retraction of the infusion cannula in the suprachoroidal space may occur in eyes with scleral thinning. As a lot has been published and discussed about sutureless vitrectomy a review of this subject is necessary. A PubMed search was performed in December 2011 with terms small gauge vitrectomy, 23-gauge vitrectomy, 25-gauge vitrectomy, and 27 gauge vitrectomy, which were revised in August 2012. There were no restrictions on the date of publication but it was restricted to articles in English or other languages, if there abstracts were available in English. PMID:23772118

  2. Recent advances in methyltransferase biocatalysis.

    Science.gov (United States)

    Bennett, Matthew R; Shepherd, Sarah A; Cronin, Victoria A; Micklefield, Jason

    2017-04-01

    S-adenosyl-L-methionine-dependent methyltransferses are ubiquitous in nature, methylating a vast range of small molecule metabolites, as well as biopolymers. This review covers the recent advances in the development of methyltransferase enzymes for synthetic applications, focusing on the methyltransferase catalyzed transformations with S-adenosyl methionine analogs, as well as non-native substrates. We discuss how metabolic engineering approaches have been used to enhance S-adenosyl methionine production in vivo. Enzymatic approaches that enable the more efficient generation of S-adenosyl methionine analogs, including more stable analogs, will also be described; this has expanded the biocatalytic repertoire of methyltransferases from methylation to a broader range of alkylation reactions. The review also examines how the selectivity of the methyltransferase enzymes can be improved through structure guided mutagenesis approaches. Finally, we will discuss how methyltransferases can be deployed in multi-enzyme cascade reactions and suggest future challenges and avenues for further investigation. Copyright © 2017 Elsevier Ltd. All rights reserved.

  3. MPTS Operation and Recent Upgrade

    Science.gov (United States)

    Leblanc, B. P.; Diallo, A.; Labik, G.; Stevens, D. R.

    2011-10-01

    NSTX's Multi-Point Thomson Scattering (MPTS) diagnostic has supported plasma operation for over ten years, during which time a phased implementation has been pursued. The measurements span the horizontal midplane covering around 90 percent of the full-bore confined plasma and the scrape-off layer (SOL). While beginning with one 30-Hz Nd:YAG laser and 10 radial positions, MPTS has operated with a second laser - combined frequency of 60 Hz - and 30 radial positions during the past six years. A recent upgrade brings the total number of radial positions to 42. While most of the 12 new channels are set to improve spatial resolution in the pedestal and internal transport barrier (ITB) regions, a limited number of extra channels have been added to the inner edge and the SOL. Many of the new channels resulted from the splitting of existing fiber bundles, an option that had been left open in MPTS's original design. The 42-channel configuration is planned to begin operation during the 2011 NSTX experimental run. Experimental results will be presented. Future plans for the upcoming NSTX center-stack upgrade will be discussed. U.S. Dept. of Energy Contract No. DE-AC02-09CH11466.

  4. Recent Advances in Ruminant Nutrition

    Directory of Open Access Journals (Sweden)

    Hasan Rüştü Kutlu

    2014-01-01

    Full Text Available One of the most industrialized animal production branches of ruminant production successfully requires a blending of theoretical knowledge of nutritional principles with practical stockmanship, maintaining health and dealing with numbers. It is well known that high yielding, dairy cows, require balanced diet with adequate nutrients for yielding. This is not provided with only a few feedstuffs. Milk production in dairy cows is related to the improvements in genetic merit of farm animals and also developments in feed science, feed technology and animal nutrition. In particular, feeds and feed technology studies associated with sustainability, economical perspectives and product quality in the last decade have been in advance. In the present work, recent advances in feed sources and feed technology, minerals (macro and trace minerals , vitamins and amino acids, feed additives (antibiotics alternative growth stimulants, rumen modulator, organic acids, antioxidants, enzymes, plant extracts, nutrition-products (meat-milk-progeny quality and functional food production (milk, meat nutrition-reproduction, nutrition-animal health, nutrition-environmental temperature, nutrition-global warming were evaluated.

  5. Recent developments in topical thrombins.

    Science.gov (United States)

    Kessler, Craig M; Ortel, Thomas L

    2009-07-01

    Managing blood loss is part of the surgeon's responsibility during surgical procedures, and a variety of therapeutic strategies are available to help accomplish this. Topical haemostatic agents are among the agents used to control surgical bleeding and locally arrest blood flow. Bovine thrombin is a commonly used topical haemostatic agent; however, its use has been associated with potential risks, including well-documented cases of antibody-mediated coagulopathy. This coagulopathy develops as a consequence of antibody formation directed against bovine thrombin, other bovine coagulation proteins, and their human orthologs. The fact that a coagulopathy can result in association with the use of bovine plasma-derived thrombin preparations prompted the FDA to require pharmaceutical companies to place a black-box warning in their prescribing information for products containing bovine plasma-derived thrombin. Recently, human plasma-derived thrombin and recombinant human thrombin have been approved by the FDA with the expectation that they will be less immunogenic than the bovine-derived product. In clinical studies, purified human plasma-derived thrombin and recombinant thrombin have demonstrated equivalent efficacy and safety, with improved immunogenicity profiles compared with bovine-derived thrombin agents. Well-designed and adequately powered clinical trials should be conducted to indicate whether human thrombin products would improve the risk-benefit and cost-benefit profiles for surgeries complicated by excessive bleeding.

  6. Recent advances on acute paraplegia

    Directory of Open Access Journals (Sweden)

    Gentian Vyshka

    2016-11-01

    Full Text Available Paraplegia and spinal cord injuries are issues of major concern to the actual medicine. But recent advances have raised hopes for a better prognosis, which has always been poor or infaust since medicine was practiced. However and interestingly enough, some concepts and definitions on the occurrence have survived for millennia. Once encountered as an issue, traumatic or non-traumatic paraplegia needs a multidisciplinary approach and a careful staging of the problem. Different scales are available with Frankel's and American Spinal Injury Association most widely used as alternatives or complementary tools. The authors discuss therapeutic options with a special focus on the stem cell therapy which has seen an impressive increase on the number of trials for a successful treatment. Sourcing and yielding of stem cells are made possible through a number of techniques, with material aspirated from bone marrow or adipose tissue, which are used along with other sources of neuronal precursors such as olfactory ensheathing cells. Nevertheless, large and multicenter studies are still lacking. However, with the quality of the ongoing work and research, the optimistic attitude seems warranted. Meanwhile, other rehabilitation and medical care interventions, always at hand, need to be applied in every individual suffering from paraplegia and spinal cord injury.

  7. Recent lifeline seismic risk studies

    Energy Technology Data Exchange (ETDEWEB)

    Kiremidjian, A.S.

    1990-01-01

    The objective of this book is to present some recent earthquake hazard and vulnerability analysis models for lifeline systems. The approach considered is different from seismic risk analysis of conventional structures in that lifelines are spatially distributed with components exposed to varying hazard levels. Losses to lifeline systems can result from direct damage to components that are affected by a single event or they can be due to down time and unavailability of the product they supply. The emphasis in the papers is on the evaluation of direct losses from failures of various types of systems. Methods for estimating direct losses and treatment of uncertainties are described in two of the papers. The approach considered is general and can be applied to most lifeline systems. Example analyses include water and transportation systems. Several of the papers summarize developments made under the Seismic Risk Assessment Study for Water and Sewage Systems conducted by the Seismic Risk Committee of the Technical Council for Lifeline Earthquake Engineering of ASCE.

  8. Recent situation of food irradiation

    International Nuclear Information System (INIS)

    Todoriki, Setsuko

    2003-01-01

    This paper summarized recent situation of food irradiation from July 2002 to June 2003. The Codex General Standard for Irradiated Foods and the Codex Recommended International Code of Practice for Radiation Processing of Food were revised by 26th CAC, 2003. The maximum absorbed dose delivered to a food should not exceed 10 kGy, except when necessary to achieve a legitimate technological purpose. Guidelines for the Use of Irradiation as a Phytosanitary Measure were carried by 5th Interim Commission on Phytosanitary Measures (ICPM) in April 2003. The Food Standards Australia New Zealand (FSANZ) permitted irradiation of eight kinds of foods. Scientific Committee on Food (SCF) in EU published Revision of the Opinion of the Scientific Committee on Food on the irradiation of food. In United States, the amount of irradiated beef is increasing. To keep safety of our foods in today's changing environment, Parliament in Japan passed the Food Safety Basic Law in May, 2003. Under the law, the Japanese government promotes several key food safety policies. (S.Y.)

  9. Recent advances in nuclear cardiology

    Energy Technology Data Exchange (ETDEWEB)

    Lee, Won Woo [Dept. Nuclear Medicine, Seoul National University Bundang Hospital, Seoul National University College of Medicine, Seongnam (Korea, Republic of)

    2016-09-15

    Nuclear cardiology is one of the major fields of nuclear medicine practice. Myocardial perfusion studies using single-photon emission computed tomography (SPECT) have played a crucial role in the management of coronary artery diseases. Positron emission tomography (PET) has also been considered an important tool for the assessment of myocardial viability and perfusion. However, the recent development of computed tomography (CT)/magnetic resonance imaging (MRI) technologies and growing concerns about the radiation exposure of patients remain serious challenges for nuclear cardiology. In response to these challenges, remarkable achievements and improvements are currently in progress in the field of myocardial perfusion imaging regarding the applicable software and hardware. Additionally, myocardial perfusion positron emission tomography (PET) is receiving increasing attention owing to its unique capability of absolute myocardial blood flow estimation. An F-18-labeled perfusion agent for PET is under clinical trial with promising interim results. The applications of F-18 fluorodeoxyglucose (FDG) and F-18 sodium fluoride (NaF) to cardiovascular diseases have revealed details on the basic pathophysiology of ischemic heart diseases. PET/MRI seems to be particularly promising for nuclear cardiology in the future. Restrictive diseases, such as cardiac sarcoidosis and amyloidosis, are effectively evaluated using a variety of nuclear imaging tools. Considering these advances, the current challenges of nuclear cardiology will become opportunities if more collaborative efforts are devoted to this exciting field of nuclear medicine.

  10. Small gauge vitrectomy: Recent update

    Directory of Open Access Journals (Sweden)

    Sumeet Khanduja

    2013-01-01

    Full Text Available Small gauge vitrectomy, also known as minimally invasive vitreous surgery (MIVS, is a classic example of progress in biomedical engineering. Disparity in conjunctival and scleral wound location and reduction in wound diameter are its core principles. Fluidic changes include increased pressure head loss with consequent reduction in infusional flow rate and use of higher aspiration vacuum at the cutter port. Increase An increase in port open/port closed time maintains an adequate rate of vitreous removal. High Intensity Discharge (HID lamps maintain adequate illumination in spite of a decrease in the number of fiberoptic fibers. The advantages of MIVS are, a shorter surgical time, minimal conjunctival damage, and early postoperative recovery. Most complications are centered on wound stability and risk of postoperative hypotony, endophthalmitis, and port site retinal break formation. MIVS is suited in most cases, however, it can cause dehiscence of recent cataract wounds. Retraction of the infusion cannula in the suprachoroidal space may occur in eyes with scleral thinning. As a lot has been published and discussed about sutureless vitrectomy a review of this subject is necessary. A PubMed search was performed in December 2011 with terms small gauge vitrectomy, 23-gauge vitrectomy, 25-gauge vitrectomy, and 27 gauge vitrectomy, which were revised in August 2012. There were no restrictions on the date of publication but it was restricted to articles in English or other languages, if there abstracts were available in English.

  11. Recent development of capture of CO2

    CERN Document Server

    Chavez, Rosa Hilda

    2014-01-01

    "Recent Technologies in the capture of CO2" provides a comprehensive summary on the latest technologies available to minimize the emission of CO2 from large point sources like fossil-fuel power plants or industrial facilities. This ebook also covers various techniques that could be developed to reduce the amount of CO2 released into the atmosphere. The contents of this book include chapters on oxy-fuel combustion in fluidized beds, gas separation membrane used in post-combustion capture, minimizing energy consumption in CO2 capture processes through process integration, characterization and application of structured packing for CO2 capture, calcium looping technology for CO2 capture and many more. Recent Technologies in capture of CO2 is a valuable resource for graduate students, process engineers and administrative staff looking for real-case analysis of pilot plants. This eBook brings together the research results and professional experiences of the most renowned work groups in the CO2 capture field...

  12. A recent intermezzo at the Ribosome Club.

    Science.gov (United States)

    Pavlov, Michael Y; Liljas, Anders; Ehrenberg, Måns

    2017-03-19

    Two sets of ribosome structures have recently led to two different interpretations of what limits the accuracy of codon translation by transfer RNAs. In this review, inspired by this intermezzo at the Ribosome Club, we briefly discuss accuracy amplification by energy driven proofreading and its implementation in genetic code translation. We further discuss general ways by which the monitoring bases of 16S rRNA may enhance the ultimate accuracy (d-values) and how the codon translation accuracy is reduced by the actions of Mg 2+ ions and the presence of error inducing aminoglycoside antibiotics. We demonstrate that complete freezing-in of cognate-like tautomeric states of ribosome-bound nucleotide bases in transfer RNA or messenger RNA is not compatible with recent experiments on initial codon selection by transfer RNA in ternary complex with elongation factor Tu and GTP. From these considerations, we suggest that the sets of 30S subunit structures from the Ramakrishnan group and 70S structures from the Yusupov/Yusupova group may, after all, reflect two sides of the same coin and how the structurally based intermezzo at the Ribosome Club may be resolved simply by taking the dynamic aspects of ribosome function into account.This article is part of the themed issue 'Perspectives on the ribosome'. © 2017 The Authors.

  13. Gas detectors: recent developments and future perspectives

    International Nuclear Information System (INIS)

    Sauli, F.

    1998-01-01

    Thirty years after the invention of the multi-wire proportional chamber, and 20 from the first Vienna Wire Chamber Conference, the interest and research efforts devoted to gas detectors are still conspicuous, as demonstrated by the number of papers submitted to this conference. Innovative and performing devices have been perfected over the years, used in experiments, and still developed today. Introduced 10 years ago, the micro-strip gas chamber appears to fulfill the needs of high-luminosity trackers; progress in this field will be reported, followed by a discussion on discharge problems encountered and possible solutions. Recent and potentially more powerfull devices such as the micro-gap, narrow-gap and micro-dot chambers will be described. A new generation of detectors exploiting avalanche multiplication in narrow gaps has emerged recently, namely micromegas, CAT (compteur a trous) and the Gas Electron Multiplier (GEM); whilst still in their infancy, they have promising performances with increased reliability in harsh operating conditions. I will describe also some 'tools of trade' used to model the counting action and to analyze the properties of the detectors, discuss limitations to their performances, and suggest ways to improvement. Several still controversial subjects of study (as for example, aging), and imaginative efforts of the experimenters ensure a continuing progress in the field of gas detectors, and new editions of this conference for years to come. (author)

  14. Global metabolic impacts of recent climate warming.

    Science.gov (United States)

    Dillon, Michael E; Wang, George; Huey, Raymond B

    2010-10-07

    Documented shifts in geographical ranges, seasonal phenology, community interactions, genetics and extinctions have been attributed to recent global warming. Many such biotic shifts have been detected at mid- to high latitudes in the Northern Hemisphere-a latitudinal pattern that is expected because warming is fastest in these regions. In contrast, shifts in tropical regions are expected to be less marked because warming is less pronounced there. However, biotic impacts of warming are mediated through physiology, and metabolic rate, which is a fundamental measure of physiological activity and ecological impact, increases exponentially rather than linearly with temperature in ectotherms. Therefore, tropical ectotherms (with warm baseline temperatures) should experience larger absolute shifts in metabolic rate than the magnitude of tropical temperature change itself would suggest, but the impact of climate warming on metabolic rate has never been quantified on a global scale. Here we show that estimated changes in terrestrial metabolic rates in the tropics are large, are equivalent in magnitude to those in the north temperate-zone regions, and are in fact far greater than those in the Arctic, even though tropical temperature change has been relatively small. Because of temperature's nonlinear effects on metabolism, tropical organisms, which constitute much of Earth's biodiversity, should be profoundly affected by recent and projected climate warming.

  15. Recent research on fumonisins: a review.

    Science.gov (United States)

    Scott, P M

    2012-01-01

    Fumonisins are well known mycotoxins produced by Fusarium verticillioides, F. proliferatum and other Fusarium species. Many new fumonisins and fumonisin-like compounds have been detected by mass spectrometry in cultures of F. verticillioides. Recently, fumonisins B(2) and B(4) were produced by Aspergillus niger isolated from coffee and fumonisin B(2) in A. niger from grapes. Fumonisin B(2) was itself detected in coffee beans, wine and beer, adding to the list of foodstuffs and feedstuffs other than corn (maize) and sorghum in which fumonisins have been found in recent years. Fumonisin B(1) (FB(1)) can bind to proteins (PB FB(1)) and to other matrix components during food processing involving heat. The occurrence of bound fumonisins in processed corn foods is common. Another type of binding (or association) relates to observed instability of fumonisins in rice flour, corn starch and corn meal at room temperature; this can affect the immunoaffinity column clean-up procedure in analysis of naturally contaminated starch-containing corn foods for fumonisins. The occurrence of N-fatty acylated fumonisin derivatives in retail fried corn foods has also been demonstrated. Bioaccessibility of free FB(1) and total bound FB(1) (TB FB(1)) present in corn flakes has been estimated by in vitro digestion experiments. Intentional binding of fumonisins to cholestyramine has been demonstrated in vivo and is a potential means of detoxification of animal feed.

  16. Recent top physics results from CMS

    CERN Multimedia

    CERN. Geneva

    2014-01-01

    The top quark, discovered in 1995 at the Tevatron, is the heaviest known elementary particle. The largeness of its mass gives rise to a number of peculiar properties: top quarks decay before they would hadronize and the measurement of their decay products provides direct access to its properties such as spin, charge, or polarization. The top quark couples most strongly with the Higgs boson, and plays a key role in the electro-weak symmetry breaking and in many scenarios of physics beyond the Standard Model. With its large center-of-mass energy and luminosity, the LHC produces top quarks in copious quantities, giving access to many new precision measurements. In this seminar, I will present recent measurements from the CMS experiment. I will focus in particular on the results on single-top quark production, where results are available in all production modes, the t-, the s- and the tW-channels. Furthermore, I will present recent measurements of top quark properties as well as searches for anomalous couplings ...

  17. Recent developments and perspective in spintronics

    Science.gov (United States)

    Fert, A.

    2008-03-01

    Recent developments and perspective in spintronics: A. Fert, UMR CNRS/Thales, 91767 Palaiseau and Université Paris-Sud, 91405 Orsay, France After an introduction on the fundamentals of spin transport and the discovery of GMR, I will focus on the most recent developments in spintronics. I will first describe the field of the spin transfer phenomena by reviewing experimental results on magnetic switching and generation of microwave oscillations by spin transfer. The synchronization and phase locking of a collection of STO’s (Spin Transfer Oscillators) is an example of new important problem raised by the experiments of spin transfer. I will present data on the synchronization of electrically connected STO. I will then continue the review with results on spintronics with semiconductors, molecular spintronics and spin Hall effect.Acknowledgements: I thanks all the coworkers of my recent works on spintronics, A. Anane[1], J. Barnas [2], A. Barthélémy [1], A. Bernand-Mantel [1], M. Bibes [1], O. Boulle [1], V.Cros [1], C.Deranlot [1], M.Elsen [1], G. Faini [3], B. Georges [1], JM.George [1], R. Giraud [3], M. Gmitra [2], J.Grollier [1], A.Hamzic [5], L. Hueso [6], H.Jaffrès [1], S. Laribi [1], A. Lemaitre [3], P. M. Levy [7], N. Mathur [6], R. Mattana [1],, F. Petroff [1], P. Seneor [1], F.Van Dau [1], A. Vaurès [1]. [1] Unité Mixte de Physique CNRS/Thales, Palaiseau and Université Paris Sud,Orsay, France[2] Department of Physics, Adam Mickiewicz University, Poznan, Poland[3] CNRS- LPN, Marcoussis, France[4] IEF, Université Paris-Sud, Orsay, France[5] University of Zagreb, Croatia[6] Cambridge University, UK [7] New York University

  18. Basic ESR studies on recent corals

    Science.gov (United States)

    Walther, Ralf; Barabas, Michael; Mangini, Augusto

    Experiments on recent corals ( Acropora palmata, Barbados) were carried out to study the dating relevant properties of the characteristic ESR signals. Highly resolved signal growth curves (55 aliquots of a sieve fraction 125-250 μm) were obtained by γ-irradiation in small steps up to 20 kGy. The signal growth curve of the 'dating signal' at g = 2.0006 can only be approximated by a single exponential saturation function in a certain dose range. Thus, ADs derived with this function tend to be overestimated. A better analytical description by two different functions was tested. Isothermal annealing experiments were carried out at various temperatures before and after irradiation with a definite γ-dose respectively. The thermal decay of the dating signal is not 1st order. Furthermore, the decay process is strongly influenced by the decay of the traps themselves. The behaviour of the signals at g = 2.0057 and g = 2.0031 was compared with that of the dating signal. A surprising result was the growth of the signal at g = 2.0057 with γ-irradiation.

  19. LIFE: Recent Developments and Progress

    Energy Technology Data Exchange (ETDEWEB)

    Anklam, T M

    2011-04-08

    Test results from the NIF show excellent progress toward achieving ignition. Experiments designed to verify coupling of the laser energy to the fusion target have shown that the efficiency meets that needed for ignition. Several tests with the cryogenic targets needed for ignition have been performed, and world-record neutron output produced. The National Ignition Campaign is on schedule to meet its 2012 ignition milestone, with the next phase in the campaign due to start later this month. It has been a busy and very productive year. The NIF is in full 24/7 operations and has progressed markedly in the path toward ignition. The long-standing goal of the National Ignition Campaign to demonstrate ignition by the end of FY 2012 is on track. The LIFE plant design has matured considerably, and a delivery plan established based on close interactions with vendors. National-level reviews of fusion are underway, and are due to present initial findings later this year. A value proposition has been drafted for review. The LIFE project is ready to move into the delivery phase.

  20. Recent developments in GEANT4

    Energy Technology Data Exchange (ETDEWEB)

    Allison, J. [Geant4 Associates International Ltd., 9 Royd Terrace, Hebden Bridge HX7 7BT (United Kingdom); The University of Manchester, School of Physics and Astronomy, Manchester M13 9PL (United Kingdom); Amako, K. [KEK, 1-1 Oho, Tsukuba, Ibaraki 305-0801 (Japan); Geant4 Associates International Ltd., 9 Royd Terrace, Hebden Bridge HX7 7BT (United Kingdom); Apostolakis, J. [CERN, 1211 Genéve 23 (Switzerland); Arce, P. [CIEMAT, Medical Applications Unit, Avenida Complutense 40, 28040 Madrid (Spain); Asai, M. [SLAC National Accelerator Laboratory, 2575 Sand Hill Road, Menlo Park, CA 94025 (United States); Aso, T. [National Institute of Technology, Toyama College, 1-2 Ebie Neriya, Imizu, Toyama 9330293 (Japan); Bagli, E. [INFN Sezione di Ferrara, Via Saragat 1, 44122 Ferrara (Italy); Bagulya, A. [Lebedev Physical Institute, Leninskii Pr. 53, Moscow 119991 (Russian Federation); Banerjee, S. [Fermi National Accelerator Laboratory, P.O. Box 500, Batavia, IL 60510 (United States); Barrand, G. [IN2P3/LAL, Universite Paris-Sud, Orsay (France); Beck, B.R. [Lawrence Livermore National Laboratory, 7000 East Avenue, Livermore, CA 94550 (United States); Bogdanov, A.G. [National Research Nuclear University (Moscow Engineering Physics Institute), Kashirskoe shosse 31, Moscow 115409 (Russian Federation); Brandt, D. [SSW Trading, Am Knick 4, Oststeinbek (Germany); Brown, J.M.C. [Queen' s University Belfast, School of Mathematics and Physics, University Road, Belfast, Northern Ireland BT7 1NN (United Kingdom); Burkhardt, H. [CERN, 1211 Genéve 23 (Switzerland); Canal, Ph. [Fermi National Accelerator Laboratory, P.O. Box 500, Batavia, IL 60510 (United States); Cano-Ott, D. [CIEMAT, Centro de Investigaciones Energéticas Medioambientales y Tecnólogicas, Avenida Complutense 40, 28040 Madrid (Spain); Chauvie, S. [Sante Croce e Carle Hospital, Via Coppino 26, I-12100 Cuneo (Italy); and others

    2016-11-01

    GEANT4 is a software toolkit for the simulation of the passage of particles through matter. It is used by a large number of experiments and projects in a variety of application domains, including high energy physics, astrophysics and space science, medical physics and radiation protection. Over the past several years, major changes have been made to the toolkit in order to accommodate the needs of these user communities, and to efficiently exploit the growth of computing power made available by advances in technology. The adaptation of GEANT4 to multithreading, advances in physics, detector modeling and visualization, extensions to the toolkit, including biasing and reverse Monte Carlo, and tools for physics and release validation are discussed here. - Highlights: • Multithreading resulted in a smaller memory footprint and nearly linear speed-up. • Scoring options, faster geometry primitives, more versatile visualization were added. • Improved electromagnetic and hadronic models and cross sections were developed. • Reverse Monte Carlo and general biasing methods were added. • Physics validation efforts were expanded and new validation tools were added.

  1. Recent results in visual servoing

    Science.gov (United States)

    Chaumette, François

    2008-06-01

    Visual servoing techniques consist in using the data provided by a vision sensor in order to control the motions of a dynamic system. Such systems are usually robot arms, mobile robots, aerial robots,… but can also be virtual robots for applications in computer animation, or even a virtual camera for applications in computer vision and augmented reality. A large variety of positioning tasks, or mobile target tracking, can be implemented by controlling from one to all the degrees of freedom of the system. Whatever the sensor configuration, which can vary from one on-board camera on the robot end-effector to several free-standing cameras, a set of visual features has to be selected at best from the image measurements available, allowing to control the degrees of freedom desired. A control law has also to be designed so that these visual features reach a desired value, defining a correct realization of the task. With a vision sensor providing 2D measurements, potential visual features are numerous, since as well 2D data (coordinates of feature points in the image, moments, …) as 3D data provided by a localization algorithm exploiting the extracted 2D measurements can be considered. It is also possible to combine 2D and 3D visual features to take the advantages of each approach while avoiding their respective drawbacks. From the selected visual features, the behavior of the system will have particular properties as for stability, robustness with respect to noise or to calibration errors, robot 3D trajectory, etc. The talk will present the main basic aspects of visual servoing, as well as technical advances obtained recently in the field inside the Lagadic group at INRIA/INRISA Rennes. Several application results will be also described.

  2. Recent advances in childhood vasculitis.

    Science.gov (United States)

    Ozen, Seza; Acar-Ozen, Nazire Pinar

    2017-09-01

    The review aims to summarize the recent findings in vasculitis that may have an impact in our understanding or management of these diseases. We are learning more about monogenic diseases that closely mimic the pediatric vasculitides. Deficiency of adenosine deaminase 2 can present with a polyarteritis nodosa (PAN)-like picture and should be included in the differential of all pediatric cases of PAN with a family history or in cases with early stroke, or in cases resistant to conventional therapy. Mutations in tumor necrosis factor α-induced protein 3 results in a disease that can present as Behçet disease called haploinsufficiency of A20. In fact, these patients would also fulfill the existing criteria for PAN and Behçet disease, respectively. Additional advances in Behçet disease pathogenesis come from a large genetic study of Turkish Behçet disease using data obtained from genotyping using the Immunochip. This confirmed the HLA-B-51 locus as the most significant association and identified new risk loci. Large Iranian and Japanese cohorts were used as replication cohorts. Best treatment of pediatric vasculitis remains a challenge as we continue to lack controlled studies. There are new reports in treatment on Henoch-Schönlein purpura/Immunoglobulin A vasculitis which is one of our most frequent childhood vasculitides. Small series of new treatments for central nervous system vasculitis and Takayasu disease will also be summarized. Diagnostic criteria have been reassessed in pediatric Behçet disease as well as adult and childhood forms of antineutrophil cytoplasmic antibodies-positive vasculitis. The new pathways defined in monogenic diseases may help us better understand the pathogenesis and may help us design more targeted therapy. Although pediatric cases are being increasingly recognized, the relative rarity of the diseases presents an obstacle for studies. Thus, we can reach conclusive results for their management through multicenter studies only.

  3. Recent Advances in Chinese Archeomagnetism

    Directory of Open Access Journals (Sweden)

    Shuhui Cai

    2017-11-01

    Full Text Available The geomagnetic field is one of Earth's fundamental properties with a history of ~3.5 Gyr. The field, generated in Earth's core is a window to the deep interior of Earth and may have played a key role in evolution of life on our planet. Materials on Earth's surface that contain magnetic minerals can record information about the geomagnetic field in which they formed. Fired archeological materials (e.g., pottery, brick, and burnt clay are favorable recorders of the field, and have been widely employed to recover geomagnetic variations over periods of hundreds to thousands of years. The longevity of Chinese civilization and the abundant nature of archeological artifacts make Chinese archeomagnetism a promising source of data. The main work of Chinese archeomagnetism was carried out in the 1980s and 90s, followed by a break of more than a decade; in the 2010s activity resumed. In this paper, we review the development of Chinese archeomagnetism, including a summary of previous work, recent progress, remaining issues and future studies with the aim of promoting an understanding of archeomagnetic work in China and to guide the way for future studies. Here, we compile published data, including some data discovered in old publications that have not yet been included in paleomagnetic databases. We also establish the first, albeit preliminary, archeomagnetic reference curves (with 42 declination / inclination pairs and 76 / 192 archeointensities for the geomagnetic field in China (ArchInt_China.1a / ArchInt_China.1b, ArchDec_China.1, ArchInc_China.1, which can be used for global comparison of the field and regional archeomagnetic dating.

  4. Asthma exacerbation prediction: recent insights.

    Science.gov (United States)

    Fleming, Louise

    2018-04-01

    Asthma attacks are frequent in children with asthma and can lead to significant adverse outcomes including time off school, hospital admission and death. Identifying children at risk of an asthma attack affords the opportunity to prevent attacks and improve outcomes. Clinical features, patient behaviours and characteristics, physiological factors, environmental data and biomarkers are all associated with asthma attacks and can be used in asthma exacerbation prediction models. Recent studies have better characterized children at risk of an attack: history of a severe exacerbation in the previous 12 months, poor adherence and current poor control are important features which should alert healthcare professionals to the need for remedial action. There is increasing interest in the use of biomarkers. A number of novel biomarkers, including patterns of volatile organic compounds in exhaled breath, show promise. Biomarkers are likely to be of greatest utility if measured frequently and combined with other measures. To date, most prediction models are based on epidemiological data and population-based risk. The use of digital technology affords the opportunity to collect large amounts of real-time data, including clinical and physiological measurements and combine these with environmental data to develop personal risk scores. These developments need to be matched by changes in clinical guidelines away from a focus on current asthma control and stepwise escalation in drug therapy towards inclusion of personal risk scores and tailored management strategies including nonpharmacological approaches. There have been significant steps towards personalized prediction models of asthma attacks. The utility of such models needs to be tested in the ability not only to predict attacks but also to reduce them.

  5. [Human babesiosis--recent discoveries].

    Science.gov (United States)

    Mitrović, Sanja; Kranjcić-Zec, Ivana; Arsić-Arsenijević, Valentina; Dzamić, Aleksandar; Radonjić, Ivana

    2004-01-01

    Babesiosis is caused by intraerythrocytic parasites of the genus Babesia, which is a common animal infection worldwide. This protozoa requires both a competent vertebrate and a nonvertebrate host (Ixodes sp. etc.) to maintain the transmission cycle. Human babesiosis is predominantly caused by Babesia microti (rodent-borne piroplasm, an emerging zoonosis in humans in North America) and by Babesia divergens (bovine pathogen, in Europe). Occasionally, infection in America is caused also by a newly recognized species, so-called WA1 piroplasm. The spectrum of human babesiosis in the USA is broad, and ranges from an apparently silent infection to a fulminant. In Europe, babesiosis is considerably rarer, but more lethal (42% mortality rate in Europe and 5% in the USA, for clinically apparent infections) and mostly in splenectomized patients. Various determinants are involved in the severity of infection, such as age, immunocompetence and coinfection with other pathogens (Borrelia burgdorferi). B. microti antigens can trigger specific activation of T-cells and the infection can be effectively controlled by a Th1-dominant CD4+ T-cell response. The diagnosis of babesiosis should include examination of blood smears stained by Giemsa, as well as serologic evaluation with indirect immunofluorescent antibody tests and possibly PCR. The treatment of babesiosis depends on severity of cases; if it is mild it resolves spontaneously, whereas very severe cases with B. divergens require prompt treatment that includes erythrocyte exchange transfuision along with intravenous clindamycin and oral quinine to arrest hemolysis and prevent renalfailure. This paper offers an overview of recent developments in the investigation of Babesia sp. and babesiosis.

  6. Recent results relevant to ignition physics and machine design issues

    International Nuclear Information System (INIS)

    Coppi, B.; Airoldi, A.; Bombarda, F.

    1999-01-01

    The plasma regimes under which ignition can be achieved involve a characteristic range of parameters and issues on which information has been provided by recent experiments. In particular, these results have motivated a new, in-depth analysis of the expected performance of the Ignitor machine as well as of the plasma processes that it can investigate. The main results and recent advances in the design of key systems of the machine are reported. (author)

  7. Recent results relevant to ignition physics and machine design issues

    International Nuclear Information System (INIS)

    Coppi, B.; Airoldi, A.; Bombarda, F.

    2001-01-01

    The plasma regimes under which ignition can be achieved involve a characteristic range of parameters and issues on which information has been provided by recent experiments. In particular, these results have motivated a new, in-depth analysis of the expected performance of the Ignitor machine as well as of the plasma processes that it can investigate. The main results and recent advances in the design of key systems of the machine are reported. (author)

  8. Comparing recent uranium supply scenarios

    International Nuclear Information System (INIS)

    Arnold, N.; Gufler, K.

    2014-01-01

    For more than one decade – even after the Fukushima accidents - an increase in global nuclear energy generation capacity is widely expected. At the same time a variety of uranium supply scenarios were published by industry, academics or international organizations, drawing different pictures of future uranium supply. They were created with the background of a uranium market facing several challenges. First an excursion in the uranium market price, in 2007, then reduced nuclear growth expectations after 2011, at least in non-Asian countries, also implying considerable changes to the supply side. For this publication a meta-study was carried out identifying, evaluating and comparing different recent scenarios on the availability of uranium. While there are some differences in the frame conditions (e.g. the expected uranium demand, the time fame, the considered mining projects,..), there are also notable similarities in these scenarios. This concerns long lead times for mine openings as well as the dependence on large mining projects (e.g. Olympic Dam, Cigar Lake). Generally, a decline in production in about 10 years is assumed, and thus the necessity of the timely development of mining projects is pointed out. In addition the omission of uranium from Russian nuclear weapons and the chances of keeping the changes in secondary supplies in balance with primary production have been widely discussed. Here, the production growth in Kazakhstan but also the role of the current market situation are central aspects. As another aspect the possible contribution from unconventional resources is of interest, particularly against the background of rising production costs for conventional resources. Finally, it shall be reflected how well older scenarios were able to map the reality and which trends could or could not be anticipated. It is relevant to identify which aspects in the development of mining capacities are essential for security of supply, and can therefore be regarded

  9. Recent Physics Results from NSTX

    International Nuclear Information System (INIS)

    Menard, J E; Bell, M G; Bell, R E; Bialek, J M; Boedo, J A; Bush, C E; Crocker, N A; Diem, S; Ferron, J R; Fredrickson, E D; Gates, D A; Hill, K W; Hosea, J C; Kaye, S M; Kessel, C E; Kubota, S; Kugel, H W; LeBlanc, B P; Lee, K C; Levinton, F M; Maingi, R; Mansfield, D K; Majeski, R P; Maqueda, R J; Mazzucato, E; Medley, S S; Mueller, D; Park, H K; Paul, S F; Peebles, W A; Raman, R; Sabbagh, S A; Skinner, C H; Smith, D R; Sontag, A C; Soukhanovskii, V A; Stratton, B C; Stutman, D; Taylor, G; Tritz, K; Wilson, J R; Yuh, H; Zhu, W; Zweben, S J

    2006-01-01

    The National Spherical Torus Experiment (NSTX) has made considerable progress in advancing the scientific understanding of high performance long-pulse plasmas needed for ITER and future low-aspect-ratio Spherical Torus (ST) devices. Plasma durations up to 1.6s (5 current redistribution times) have been achieved at plasma currents of 0.7 MA with non-inductive current fractions above 65% while achieving β T and β N values of 16% and 5.7 (%mT/MA), respectively. Newly available Motional Stark Effect data has allowed systematic study and validation of current drive sources and improved the understanding of ''hybrid''-like scenarios. In MHD research, six mid-plane ex-vessel radial field coils have been utilized to infer and correct intrinsic error fields, provide rotation control, and actively stabilize the n=1 resistive wall mode at ITER-relevant low plasma rotation values. In transport and turbulence, the low aspect ratio and wide range of achievable β in NSTX provide unique data for confinement scaling studies. A new high-k scattering diagnostic is investigating turbulent density fluctuations with wavenumbers extending from ion to electron gyro-scales. In the area of energetic particle research, cyclic neutron rate drops have been associated with the destabilization of multiple large Toroidal Alfven Eigenmodes (TAEs) similar to the ''sea-of-TAE'' modes predicted for ITER. Three wave coupling processes between energetic particle modes and TAEs have also been observed for the first time. In boundary physics, advanced shape control has been utilized to study the role of magnetic balance in H-mode access and ELM stability. Peak divertor heat flux has been reduced by a factor of 5 using an H-mode compatible radiative divertor, and Lithium conditioning has demonstrated particle pumping and improved thermal confinement. Finally, non-solenoidal plasma start-up research is particularly important for the ST, and Coaxial Helicity Injection has now produced 160kA plasma

  10. Recent validation tests of the Edelweiss II detector holders

    International Nuclear Information System (INIS)

    Schwamm, F.; Chapellier, M.; Herve, S.; Karolak, M.; Navick, X.-F.

    2006-01-01

    A very good understanding of noise sources is highly important for the sensitivity of a dark matter search experiment. One of these noise contributions in the Edelweiss experiment could be the microphonics and temperature variations caused by vibrations of the cryostat. Recent studies complement an earlier work in describing the effect of the Edelweiss II detector holders on the amplitude of the vibrations seen by the detector. The results of these studies will be presented in this article

  11. Recent trends in metals extraction

    Directory of Open Access Journals (Sweden)

    Regel-Rosocka, M.

    2013-08-01

    Full Text Available After near 70 years of practical usage, solvent extraction is a perfectly mastered technique of separation, widely used on an industrial scale for the separation of metals mainly from raw materials. However, currently, in the era of depleting natural resources and increasingly less accessible deposits, environmental restrictions, etc., an increasing interest, both from social and economical constrains, is being directed at the extraction of metals from the secondary sources (such as batteries, electronic scrap. In many cases, solvent extraction, due to its operational characteristics, can be considered as the Best Available Technology for the purpose of separating multielemental metal solutions. This paper provides a brief overview of past achievements and present scenario of solvent extraction investigations and developments, describing some recently commissioned solvent extraction plants, whereas the Skorpion Zinc plant (Namibia for zinc extraction from raw materials and caesium removal from radioactive High Level Wastes (HLWs are told over in detail as case studies. The paper also presents some proposals for the use of liquid-liquid extraction to separate metal ions from secondary sources (e.g. cobalt from industrial waste streams. The review highlights the emerging use of ionic liquids as new extractants for metals, providing an insight into this exciting research field. Despite its detractors, solvent extraction has entered in force into XXI century as a leading separation technology for metals.Después de casi 70 años de uso práctico, la extracción líquido-líquido o extracción con disolventes es una técnica de separación muy evolucionada, utilizándose a escala industrial en el beneficio de metales obtenidos de diversas materias primas. Sin embargo, con el agotamiento de los recursos naturales y el aumento de depósitos minerales de más difícil acceso, restricciones medio ambientales, etc., ha aumentado el interés, tanto desde

  12. Recent Impacts on the Moon

    Science.gov (United States)

    Robinson, M. S.; Bowles, Z. R.; Daubar, I.; Povilaitis, R.; Thompson, S. D.; Thompson, T. J.; Wagner, R.

    2013-12-01

    Prior to Lunar Reconnaissance Orbiter (LRO) observations, an understanding of impact rates of meteoroids meteors in Earth's atmosphere [4], recent impacts recorded on Mars [5,6,7], and lunar 'flashes' (likely impacts) observed by teams such as those at Marshall Space Flight Center [8]. Since July of 2009, the Lunar Reconnaissance Orbiter Camera (LROC) collects meter scale Narrow Angle Camera (NAC) images, with repeat coverage in areas of high interest. Planned and serendipitous re-imaging with similar illumination conditions provides the means to detect temporal surface changes with the ultimate goal of measuring the current flux of impacts on the Moon. To easily detect a change at the surface, NAC-pairs separated in time (temporal pair), with similar illumination geometries are compared. Overlapping regions in a temporal pair are map projected and co-registered and a ratio is computed (second observation / first observation) and examined for temporal anomalies. Some changes are clearly distinguished as newly formed craters with rims and ejecta, while others are simply small (a few pixels) reflectance changes (crater not resolved). Detections are categorized as relatively high reflectance changes (HRC) or low reflectance changes (LRC) relative to the surrounding substrate. To date the LRCs outnumber the HRCs by a factor of ten. Clusters (>3) of changes were discovered in 48 temporal pairs. So far, we have identified 599 individual changes, with 547 LRCs and 48 HRCs. Of the 599 detections, sixteen represent resolved craters, and of these diameters range up to 20 m, suggesting bolide sizes up to ~1 m diameter. The total surface area examined to date is ~25,000 square km and the maximum time window between repeat images is 2.5 years, yielding an estimated minimum 364,000 new lunar craters per year (or one crater per year for every 104 square km) detectable at the scale of NAC images (secondary or primary events), assuming all temporal changes are due to impacts. The

  13. Recent life events and psychosis: The role of childhood adversities.

    Science.gov (United States)

    Mansueto, Giovanni; Faravelli, Carlo

    2017-10-01

    Life events are commonly reported to be related to psychosis. However, less attention has been given to the role that recent events play on psychosis, in relation to exposure to childhood adversity. The current study aimed to evaluate the relationship between recent events and psychosis, taking into account the role of early adversities. 78 psychotic patients and 156 controls were enrolled. Childhood adversity was evaluated using a validated semi-structured interview and the Childhood Experience of Care and Abuse Questionnaire. Recent events were recorded using a semi-structured interview with a normative and contextual approach. The diagnosis of psychosis was made according to Jablenski's criteria. Chi-square, t-test, odds ratio, and binary logistic regression statistical analyses were performed. Psychotic patients reported an excess of recent events. The occurrence of more than one recent event increased the risk of psychosis; there was a cumulative effect between recent and childhood events on psychosis. Recent events were significantly related to psychosis, even in the absence of childhood adversity or when adjusted for it. Our findings suggested that the effect of recent events on psychosis may be amplified by previous exposure to early adversity. Recent events alone, could be also linked to psychosis independently of childhood adversity. Copyright © 2017 Elsevier B.V. All rights reserved.

  14. LHCb: Recent results on B and D decays from LHCb

    CERN Multimedia

    Obłakowska-Mucha, A

    2014-01-01

    The LHCb experiment has collected more than 3 fb$^{-1}$ of integrated luminosity in 2011 and 2012 and is producing a large amount of excellent results in beauty and charmed meson physics. An overview of the most recent results on rare B decays, CP violation, and charm physics will be given along with an outlook to the physics perspectives and to the LHCb upgrade.

  15. Recent Developments in VSD Imaging of Small Neuronal Networks

    Science.gov (United States)

    Hill, Evan S.; Bruno, Angela M.; Frost, William N.

    2014-01-01

    Voltage-sensitive dye (VSD) imaging is a powerful technique that can provide, in single experiments, a large-scale view of network activity unobtainable with traditional sharp electrode recording methods. Here we review recent work using VSDs to study small networks and highlight several results from this approach. Topics covered include circuit…

  16. Recent ATLAS Higgs measurements using di-boson decays

    CERN Multimedia

    CERN. Geneva

    2018-01-01

    The seminar presents recent measurements of Higgs boson production properties using decays to pairs of W bosons, Z bosons or photons. The results are based on 36 fb-1 of pp collision data taken in 2015 and 2016 at 13 TeV by the ATLAS experiment.

  17. Recent developments at the Rehovot 14UD pelletron

    International Nuclear Information System (INIS)

    Hollos, G.; Kaim, R.; Shachar, Y.; Yurman, Y.

    1984-01-01

    We describe our experience with electrostatic quadrupole lenses which are now operating in the low-energy mid-column and in the terminal of the 14UD Pelletron accelerator. The recent replacement of all needles in the closed corona voltage distribution system and its effect on machine performance are discussed. (orig.)

  18. Recent developments at the Rehovot 14UD Pelletron

    Science.gov (United States)

    Hollos, G.; Kaim, R.; Shachar, Y.; Yurman, Y.

    1984-02-01

    We describe our experience with electrostatic quadrupole lenses which are now operating in the low-energy mid-column and in the terminal of the 14UD Pelletron accelerator. The recent replacement of all needles in the closed corona voltage distribution system and its effect on machine performance are discussed.

  19. Recent results on heterojunctions and superlattices: transport and optics

    International Nuclear Information System (INIS)

    Voos, M.

    1983-01-01

    Recent experimental results obtained on two-dimensional semiconductor structures, namely heterojunctions and superlattices are presented. This review, which includes both optical and transport experiments, is not exhaustive, but describes briefly some investigations which are thought to be important from the point of view of fundamental physics. (Author) [pt

  20. Recent radioactive ion beam program at RIKEN and related topics

    Indian Academy of Sciences (India)

    Recent experimental programs at RIKEN concerning RI beams are reviewed. RIKEN has the ring cyclotron (RRC) with high intense heavy-ion beams and large acceptance fragment separator, RIPS. The complex can provide high intense RI-beams. By using the high intense RI-beams, a variety of experiments have been ...

  1. Some recent results at the Saclay electron linear accelerator

    International Nuclear Information System (INIS)

    Schuhl, C.

    1985-02-01

    Four examples of experiments realized recently are presented: the pi zero photoproduction on the proton near the threshold, the magnetic form factor of the deuteron, the electromagnetic form factor measurement of the tritium, the many body effects in the reaction 3 He(e,e'p) [fr

  2. Recent archaeomagnetic studies in Slovakia: Comparison of methodological approaches

    Science.gov (United States)

    Kubišová, Lenka

    2016-03-01

    We review the recent archaeomagnetic studies carried out on the territory of Slovakia, focusing on the comparison of methodological approaches, discussing pros and cons of the individual applied methods from the perspective of our experience. The most widely used methods for the determination of intensity and direction of the archaeomegnetic field by demagnetisation of the sample material are the alternating field (AF) demagnetisation and the Thellier double heating method. These methods are used not only for archaeomagnetic studies but also help to solve some geological problems. The two methods were applied to samples collected recently at several sites of Slovakia, where archaeological prospection invoked by earthwork or reconstruction work of developing projects demanded archaeomagnetic dating. Then we discuss advantages and weaknesses of the investigated methods from different perspectives based on several examples and our recent experience.

  3. Review of recent irradiation-creep results

    International Nuclear Information System (INIS)

    Coghlan, W.A.

    1982-05-01

    Materials deform faster under stress in the presence of irradiation by a process known as irradiation creep. This phenomenon is important to reactor design and has been the subject of a large number of experimental and theoretical investigations. The purpose of this work is to review the recent experimental results to obtain a summary of these results and to determine those research areas that require additional information. The investigations have been classified into four subgroups based on the different experimental methods used. These four are: (1) irradiation creep using stress relaxation methods, (2) creep measurements using pressurized tubes, (3) irradiation creep from constant applied load, and (4) irradiation creep experiments using accelerated particles. The similarity and the differences of the results from these methods are discussed and a summary of important results and suggested areas for research is presented. In brief, the important results relate to the dependence of creep on swelling, temperature, stress state and alloying additions. In each of these areas new results have been presented and new questions have arisen which require further research to answer. 65 references

  4. Recent advances in solar photovoltaic technology

    International Nuclear Information System (INIS)

    Yoshihiro Hamakawa

    2000-01-01

    The current state of the art in recent progress of Japanese photovoltaic activities are overviewed. Firstly, a new strategy for the renewable energy promotion so called Fundamental Principle to promote New Energy Developments and Utilization, and its action planning for PV technology up to year of 2010 are introduced. The program structure and some tangible actions such as tax reduction for investment in the renewable energy plants, government financial support of 2/3 subsidy of PV system developments for public facilities namely as PV Field Test Experiments, and a 1/2 subsidy for the private solar house as PV House Monitor Plan are presented. Secondly, some new topics in the field of solar cell production technology in Japan and also statistics of the solar cell module productions for three kinds of silicon basis solar cells are summarized. Progress of the conversion efficiency in various types of solar cells are also surveyed. In the final part of paper possible new roles to contribute to the global environmental issues by the PV system developments are proposed. (Author)

  5. Recent developments with microchannel-plate PMTs

    Science.gov (United States)

    Lehmann, A.; Böhm, M.; Britting, A.; Eyrich, W.; Pfaffinger, M.; Uhlig, F.; Belias, A.; Dzhygadlo, R.; Gerhardt, A.; Götzen, K.; Kalicy, G.; Krebs, M.; Lehmann, D.; Nerling, F.; Patsyuk, M.; Peters, K.; Schepers, G.; Schmitt, L.; Schwarz, C.; Schwiening, J.; Traxler, M.; Zühlsdorf, M.; Düren, M.; Etzelmüller, E.; Föhl, K.; Hayrapetyan, A.; Kröck, B.; Merle, O.; Rieke, J.; Schmidt, M.; Wasem, T.; Cowie, E.; Keri, T.; Achenbach, P.; Cardinali, M.; Hoek, M.; Lauth, W.; Schlimme, S.; Sfienti, C.; Thiel, M.

    2017-12-01

    Microchannel-plate (MCP) PMTs are the favored photon sensors for the DIRC detectors of the PANDA experiment at FAIR. Until recently the main drawback of MCP-PMTs were serious aging effects which led to a limited lifetime due to a rapidly decreasing quantum efficiency (QE) of the photo cathode (PC) as the integrated anode charge (IAC) increased. In the latest models of PHOTONIS and Hamamatsu an innovative atomic layer deposition (ALD) technique is applied to overcome these limitations. During the last five years comprehensive aging tests with ALD coated MCP-PMTs were performed and the results were compared to tubes treated with other techniques. The QE in dependence of the IAC was measured as a function of the wavelength and the position across the PC. For the best performing tubes the lifetime improvement in comparison to the older MCP-PMTs is a factor of > 50 based on an IAC of meanwhile > 10 C /cm2 . In addition, the performance results of a new 2-in. ALD coated MCP-PMT prototype from Hamamatsu with a very high position resolution (128×6 anode pixels) is presented and the first conclusions from investigations concerning the PC aging mechanism will be discussed.

  6. Recent Progress in Mirror Studies in Novosibirsk

    International Nuclear Information System (INIS)

    Kruglyakov, E.P.; Dimov, G.I.; Ivanov, A.A.; Koidan, V.S.

    2005-01-01

    At present, in the Budker Institute of Nuclear Physics there is in operation the most complete set of modern mirror machines based on different principles of plasma confinement. This set includes the multi-mirror system GOL-3 for confinement of dense plasma heated by relativistic electron beam, the gas dynamic trap (GDT) for confinement of collisional plasma and anisotropic fast ions, and the ambipolar trap AMBAL-M.Mirrors have a number of advantages in comparison with the closed magnetic systems like tokamak, stellarator, etc. The most important are the following. The effects of disruptions are not appeared in mirrors. There are no divertor problems in them. Plasma pressure in a mirror device can be comparable with magnetic field pressure. As to the multi-mirror system, in this case, the β value can be even significantly higher than unity (the so called >). At last, mirrors are convenient for direct conversion of energy of charged particles leaving out the ends. This circumstance can turn out to be especially important in future > schemes of fusion reactors.In principle, mirrors are very attractive from the engineering point of view, if the plasma confined in axisymmetric magnetic systems would be MHD stable. At present, the problem of MHD stability has already been solved for all axisymmetric traps designed in Novosibirsk. At least, the value β [approximately or equal to] 0.4 was obtained in these traps without any indications of macroscopic instability development.Some important results were obtained recently in the GOL-3 experiments. A specific mechanism of reduction of longitudinal electron thermal conductivity was detected. Recently, the magnetic system of the GOL-3 device was reconstructed into multi-mirror configuration. In this configuration, a new mechanism of fast ion heating was observed. As a result, the ion temperature was increased from a few eV up to 1 keV and the confinement time significantly increased (up to 1ms). These results were obtained

  7. Recent innovations in IFR safety research

    International Nuclear Information System (INIS)

    Wade, D.C.

    1994-01-01

    Recent progress in IFR safety research suggests potential for two extensions of passive features to improve the robustness of safety response. This report provides a discussion of these recent innovations

  8. Recent negative ion source activity at JYFL

    Science.gov (United States)

    Kalvas, T.; Tarvainen, O.; Komppula, J.; Laitinen, M.; Sajavaara, T.; Koivisto, H.; Jokinen, A.; Dehnel, M. P.

    2013-02-01

    A filament-powered multicusp ion source for production of H- has been developed for the Jyväskylä Pelletron accelerator for use in ion beam lithography and particle induced X-ray emission applications. The source can be considered conventional with the exception of the filter field being created with an electric magnet for continuous adjustability. A permanent magnet dipoleantidipole electron dump is integrated in the puller electrode. The source provides 50 μA H- beam at 10 keV energy with 0.019 mm mrad 95 % normalized rms emittance through a 2 mm aperture. Lower emittance is achievable by changing the plasma electrode insert to a smaller aperture one if application requires. A new commercial MCC30/15 cyclotron has been installed at the Jyväskylä accelerator laboratory providing 30MeV H+ and 15Mev D+ for use in nuclear physics experiments and applications. The ion source delivered with the cyclotron is a a filament-powered multicusp source capable of about 130 h continuous operation at 1 mA H- output between filament changes. The ion source is located in the cyclotron vault and therefore a significant waiting time for the vault cooldown is required before filament change is possible. This kind of operation is not acceptable as 350 h and longer experiments are expected. Therefore a project for developing a CW 13.56 MHz RF ion source has been initiated. A planar RF antenna replacing the filament back plate of the existing TRIUMF-type ion source has been used in the first tests with 240 μA of H- and 21 mA of electrons measured at 1.5 kW of RF power. Tests with higher RF power levels were prevented by electron beam induced sparking. A new plasma chamber has been built and a new extraction is being designed for the RF ion source. The extraction code IBSimu has recently gone through a major update on how smooth electrode surfaces are implemented in the Poisson solvers. This has made it possible to implement a fast multigrid solver with low memory consumption. Also

  9. The PARTRAC code: Status and recent developments

    Science.gov (United States)

    Friedland, Werner; Kundrat, Pavel

    Biophysical modeling is of particular value for predictions of radiation effects due to manned space missions. PARTRAC is an established tool for Monte Carlo-based simulations of radiation track structures, damage induction in cellular DNA and its repair [1]. Dedicated modules describe interactions of ionizing particles with the traversed medium, the production and reactions of reactive species, and score DNA damage determined by overlapping track structures with multi-scale chromatin models. The DNA repair module describes the repair of DNA double-strand breaks (DSB) via the non-homologous end-joining pathway; the code explicitly simulates the spatial mobility of individual DNA ends in parallel with their processing by major repair enzymes [2]. To simulate the yields and kinetics of radiation-induced chromosome aberrations, the repair module has been extended by tracking the information on the chromosome origin of ligated fragments as well as the presence of centromeres [3]. PARTRAC calculations have been benchmarked against experimental data on various biological endpoints induced by photon and ion irradiation. The calculated DNA fragment distributions after photon and ion irradiation reproduce corresponding experimental data and their dose- and LET-dependence. However, in particular for high-LET radiation many short DNA fragments are predicted below the detection limits of the measurements, so that the experiments significantly underestimate DSB yields by high-LET radiation [4]. The DNA repair module correctly describes the LET-dependent repair kinetics after (60) Co gamma-rays and different N-ion radiation qualities [2]. First calculations on the induction of chromosome aberrations have overestimated the absolute yields of dicentrics, but correctly reproduced their relative dose-dependence and the difference between gamma- and alpha particle irradiation [3]. Recent developments of the PARTRAC code include a model of hetero- vs euchromatin structures to enable

  10. Recent developments in MAD version 8

    International Nuclear Information System (INIS)

    Grote, H.; Iselin, F.C.

    1990-01-01

    In view of experience with the language decoder and memory manager, large parts of MAD have been rewritten recently. The dynamic memory manager is replaced by the CERN-written ZEBRA package which has been used successfully in more than 100 other programs for HEP data analysis. A new dynamic table handler keeps large tables in memory as long as they fit; it dumps them on disk or to the Cray SSD (solid-state storage device) if necessary. Tables are accessed by simple subroutine calls in a manner transparent to the user. The input language has been extended to use a more object-oriented approach. Accelerator elements are described in terms of classes of objects, providing easy selection of single elements in a large machine. A powerful mechanism has been implemented for writting tables of selected optical functions and/or element parameters in selected positions of the machine. These tables are generated and written under control of the table handler, and can be read directly by the LEP control system. MAD contains a plot module with various options to plot data from internal tables. The tables can also be fed into a stand-alone plot program. At present the following program modulus are complete: Command Decoder; Optical Functions Calculation; Closed-Orbit Correction; Harmon (chromaticity calculation); Plotting. It is foreseen that by the end of 1989 the following other modules will be ready: Matching, including some new features; Lie Algebraic Analysis: Tracking by TRANSPORT and Lie Algebraic Methods; Electron Beam Parameters; Polarization. (orig.)

  11. Recent space debris related topics in Japan

    Science.gov (United States)

    Kibe, S.; Kawamoto, S.; Gilardi, G.

    This paper introduces recent space debris related activities in Japan. As for the ground based observation, the progress of the 1 m optical telescope construction at the Bisei Space Guard Center is to be reported as well as technology development such as the automated debris detection and attitude estimation techniques from optical image data. Next, activities on the hypervelocity acceleration technology are to be mentioned. Tokyo Institute of Technology team succeeded to launch a projectile of 0.6 g at 8.2 km/s using their Two-/Three- Stage Light Gas Gun, which is believed to be the world record for TSLGGs. In addition, National Aerospace Laboratory has been continuing their efforts to develop the Inhibited Conical Shaped Charge Launcher and is currently investigating the effects of high internal energy and irregular shape of the projectile. Based on the projectile density measurement method newly proposed by them, comparison with the other CSC system than NAL's one is to be shown. Finally, introduced is the progress of research activities on the active removal system for post mission spacecraft. Based on the technological foundation acquired in the ETS-VII experiment, NAL and NASDA are pursuing the possibility of active removal of system level large objects from the densely populated orbit, which contains a lot of technological challenges such as angular motion estimation using only image data, angular momentum dissipation, electro-dynamic tether as a highly efficient thruster and remote and autonomous robot operation. Also shortly introduced is domestic dis cussion on implementation of debris related activities in Japan's new space development organization to be founded in January 2004.

  12. Recent progress in gasoline surrogate fuels

    KAUST Repository

    Sarathy, Mani

    2017-12-06

    Petroleum-derived gasoline is currently the most widely used fuel for transportation propulsion. The design and operation of gasoline fuels is governed by specific physical and chemical kinetic fuel properties. These must be thoroughly understood in order to improve sustainable gasoline fuel technologies in the face of economical, technological, and societal challenges. For this reason, surrogate mixtures are formulated to emulate the thermophysical, thermochemical, and chemical kinetic properties of the real fuel, so that fundamental experiments and predictive simulations can be conducted. Early studies on gasoline combustion typically adopted single component or binary mixtures (n-heptane/isooctane) as surrogates. However, the last decade has seen rapid progress in the formulation and utilization of ternary mixtures (n-heptane/isooctane/toluene), as well as multicomponent mixtures that span the entire carbon number range of gasoline fuels (C4–C10). The increased use of oxygenated fuels (ethanol, butanol, MTBE, etc.) as blending components/additives has also motivated studies on their addition to gasoline fuels. This comprehensive review presents the available experimental and chemical kinetic studies which have been performed to better understand the combustion properties of gasoline fuels and their surrogates. Focus is on the development and use of surrogate fuels that emulate real fuel properties governing the design and operation of engines. A detailed analysis is presented for the various classes of compounds used in formulating gasoline surrogate fuels, including n-paraffins, isoparaffins, olefins, naphthenes, and aromatics. Chemical kinetic models for individual molecules and mixtures of molecules to emulate gasoline surrogate fuels are presented. Despite the recent progress in gasoline surrogate fuel combustion research, there are still major gaps remaining; these are critically discussed, as well as their implications on fuel formulation and engine

  13. Recent UCN source developments at Los Alamos

    International Nuclear Information System (INIS)

    Seestrom, S.J.; Anaya, J.M.; Bowles, T.J.

    1998-01-01

    The most intense sources of ultra cold neutrons (UCN) have bee built at reactors where the high average thermal neutron flux can overcome the low UCN production rate to achieve usable densities of UCN. At spallation neutron sources the average flux available is much lower than at a reactor, though the peak flux can be comparable or higher. The authors have built a UCN source that attempts to take advantage of the high peak flux available at the short pulse spallation neutron source at the Los Alamos Neutron Science Center (LANSCE) to generate a useful number of UCN. In the source UCN are produced by Doppler-shifted Bragg scattering of neutrons to convert 400-m/s neutrons down into the UCN regime. This source was initially tested in 1996 and various improvements were made based on the results of the 1996 running. These improvements were implemented and tested in 1997. In sections 2 and 3 they discuss the improvements that have been made and the resulting source performance. Recently an even more interesting concept was put forward by Serebrov et al. This involves combining a solid Deuterium UCN source, previously studied by Serebrov et al., with a pulsed spallation source to achieve world record UCN densities. They have initiated a program of calculations and measurements aimed at verifying the solid Deuterium UCN source concept. The approach has been to develop an analytical capability, combine with Monte Carlo calculations of neutron production, and perform benchmark experiments to verify the validity of the calculations. Based on the calculations and measurements they plan to test a modified version of the Serebrov UCN factory. They estimate that they could produce over 1,000 UCN/cc in a 15 liter volume, using 1 microamp of 800 MeV protons for two seconds every 500 seconds. They will discuss the result UCN production measurements in section 4

  14. Recent Decadal Variations of El Nino Predictability

    Science.gov (United States)

    Wang, Guomin; Hendon, Harry; Zhao, Mei

    2017-04-01

    Predictive skill for El Niño in the equatorial eastern Pacific across a range of forecast models declined in the early 21st century relative to what was achieved in the late 20th century. This decline coincided with a reduction of El Niño variability in the eastern Pacific and a shift in Pacific climate to an enhanced east-west surface temperature gradient and stronger trade winds in the central Pacific, which has previously been associated with the recent hiatus in global surface warming. It is an outstanding question as to whether this shift in climate at the end of the 20th century acted to weaken El Niño variability, hence predictability, or whether El Niño variability weakened by chance thus reducing predictability but in so doing resulted in the shift in climate. Using seasonal forecast sensitivity experiments with the Australian Bureau of Meteorology coupled model POAMA2.4, the shift to intensified east-west surface temperature gradient and stronger central Pacific trade winds is shown to weaken the ocean-atmosphere feedback that amplify eastern Pacific El Niño, thus resulting in weaker variability that is less predictable. This weakened coupling helps explain the fitful behaviour and challenges for forecasting the non-developing El Niño in early 2014. In contrast, the Pacific mean state appears to have swung to a more favourable condition for promoting El Nino toward the end of 2014, thus supporting stronger development of El Nino in 2015.

  15. Recent Progress in the Study of Topological Semimetals

    Science.gov (United States)

    Bernevig, Andrei; Weng, Hongming; Fang, Zhong; Dai, Xi

    2018-04-01

    The topological semimetal is a new, theoretically predicted and experimentally discovered, topological state of matter. In one of its several realizations, the topological semimetal hosts Weyl fermions, elusive particles predicted more than 85 years ago, sought after in high-energy experiments, but only recently found in a condensed-matter setting. In the present review, we catalogue the most recent progress in this fast-developing research field. We give special attention to topological invariants and the material realization of three different types of topological semimetal. We also discuss various photo emission, transport and optical experimental observables that characterize the appearance of topological semimetal phases.

  16. Tourist product in experience economy

    OpenAIRE

    Stasiak Andrzej

    2014-01-01

    The turn of the 20th and 21st c. was marked by the development of experience economy, in which the basic commodities are not specific products, but the customers’ emotions, impressions and experiences. Tourism has always been a particular “holiday experience industry”. In recent years, however, the importance of the conscious creation of emotional tourism products has become even greater; we may observe continuous efforts to multiply and intensify tourism experience. The key activities to ach...

  17. Recent results from CERN-WA98

    International Nuclear Information System (INIS)

    Stankus, P.

    1997-02-01

    The CERN experiment WA98 is a general-survey, open-spectrometer experiment designed to examine 160 A GeV/c Pb+A collisions at the CERN-SPS. The experiment has a broad physics agenda, as suggested by its many different subsystems. A diagram of the experiment as it stood in 1995 is shown in the report. Detectors whose results are presented here are described briefly

  18. Recent results from CERN-WA98

    Energy Technology Data Exchange (ETDEWEB)

    Stankus, P.; WA98 Collaboration

    1997-02-01

    The CERN experiment WA98 is a general-survey, open-spectrometer experiment designed to examine 160 A GeV/c Pb+A collisions at the CERN-SPS. The experiment has a broad physics agenda, as suggested by its many different subsystems. A diagram of the experiment as it stood in 1995 is shown in the report. Detectors whose results are presented here are described briefly.

  19. Ultrafast gas switching experiments

    International Nuclear Information System (INIS)

    Frost, C.A.; Martin, T.H.; Patterson, P.E.; Rinehart, L.F.; Rohwein, G.J.; Roose, L.D.; Aurand, J.F.; Buttram, M.T.

    1993-01-01

    We describe recent experiments which studied the physics of ultrafast gas breakdown under the extreme overvoltages which occur when a high pressure gas switch is pulse charged to hundreds of kV in 1 ns or less. The highly overvolted peaking gaps produce powerful electromagnetic pulses with risetimes Khz at > 100 kV/m E field

  20. Alignement experience in STAR

    CERN Document Server

    Margetis, S; Lauret, J; Perevozchikov, V; Van Buren, G; Bouchef, J

    2007-01-01

    The STAR experiment at RHIC uses four layers of silicon strip and silicon drift detectors for secondary vertex reconstruction. An attempt for a direct charm meson measurement put stringent requirements on alignment and calibration. We report on recent alignment and drift velocity calibration work performed on the inner silicon tracking system.